:root {
  --bg-primary: #080c14;
  --bg-secondary: #0f172a;
  --bg-card: #131d31;
  --bg-card-hover: #19263f;
  --bg-input: #0a0f1d;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-emerald: #10b981;
  --accent-emerald-hover: #059669;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 0 25px rgba(59, 130, 246, 0.2);
  --shadow-glow-emerald: 0 0 25px rgba(16, 185, 129, 0.25);
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.app-header {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon-wrapper {
  position: relative;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon {
  font-size: 20px;
  filter: drop-shadow(0 2px 6px rgba(59, 130, 246, 0.5));
}

.brand-icon-glow {
  position: absolute;
  inset: 0;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
  pointer-events: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.brand-badge {
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid rgba(16, 185, 129, 0.35);
  -webkit-text-fill-color: var(--accent-emerald);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

/* Header auxiliary icon buttons (Shortcuts, API Docs, Admin Payments - Task 3) */
.header-icon-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  min-width: 38px;
  height: 36px;
  padding: 0 12px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
  box-sizing: border-box;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateY(-1px);
}

.header-icon-btn .btn-icon {
  font-size: 14px;
  line-height: 1;
}

.header-icon-btn .btn-label-desktop {
  font-size: 12px;
  letter-spacing: 0.02em;
}

.admin-link-btn {
  border-color: rgba(59, 130, 246, 0.35);
  background: rgba(59, 130, 246, 0.08);
  color: #93c5fd;
}

.admin-link-btn:hover {
  border-color: rgba(59, 130, 246, 0.6);
  background: rgba(59, 130, 246, 0.18);
  color: #fff;
}

@media (max-width: 900px) {
  .header-icon-btn {
    min-width: 36px;
    width: 36px;
    height: 36px;
    padding: 0;
  }
  .header-icon-btn .btn-label-desktop {
    display: none;
  }
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(16, 185, 129, 0.08);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.status-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  position: relative;
}

.status-pulse-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid var(--accent-emerald);
  animation: pulseBeacon 2s infinite;
}

@keyframes pulseBeacon {
  0% { transform: scale(0.9); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* Layout */
.app-container {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 24px;
  padding: 24px 32px;
  flex: 1;
  max-width: 1750px;
  margin: 0 auto;
  width: 100%;
}

@media (max-width: 1200px) {
  .app-container {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 16px;
  }
}

/* Panels */
.panel {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease;
}

.panel:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.panel-header {
  padding: 16px 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.01em;
}

.panel-icon {
  font-size: 18px;
}

.panel-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 3px 9px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.panel-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  flex: 1;
}

/* Sample Bar */
.sample-bar-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sample-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sample-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sample-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.sample-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.sample-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.15);
  padding: 1px 5px;
  border-radius: 4px;
}

.sample-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent-blue);
  transform: translateY(-1px);
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(59, 130, 246, 0.35);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  text-align: center;
  background: var(--bg-input);
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.dropzone-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: opacity 0.3s;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.07);
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.15);
}

.dropzone-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.dropzone-icon-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.dropzone:hover .dropzone-icon-circle {
  transform: scale(1.08);
}

.dropzone-text {
  text-align: left;
}

.dropzone-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.dropzone-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

.file-input {
  display: none;
}

.file-info-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(59, 130, 246, 0.35);
  margin-top: 14px;
  position: relative;
  z-index: 2;
  animation: fadeIn 0.2s ease;
}

.chip-remove-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 0 2px;
  transition: color 0.15s;
}

.chip-remove-btn:hover {
  color: var(--accent-rose);
}

/* Page Selector Bar */
.page-select-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 16px;
}

.page-select-inner {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-icon {
  font-size: 16px;
}

.page-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.page-stepper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-step-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 5px 9px;
  cursor: pointer;
  font-size: 11px;
  transition: all 0.15s;
}

.page-step-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.page-input {
  width: 50px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-mono);
  text-align: center;
  padding: 4px 0;
  outline: none;
}

.page-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.page-reprocess-btn {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.2));
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: var(--radius-sm);
  color: #93c5fd;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.page-reprocess-btn:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
  transform: translateY(-1px);
}

/* Loading Skeletons */
.diagrams-skeleton-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skeleton-header-bar {
  display: flex;
  justify-content: space-between;
}

.skeleton-title-pill {
  width: 140px;
  height: 20px;
  border-radius: 6px;
}

.skeleton-nav-pill {
  width: 110px;
  height: 20px;
  border-radius: 6px;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

@media (max-width: 768px) {
  .skeleton-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.skeleton-card {
  height: 105px;
  border-radius: var(--radius-sm);
}

.skeleton-shimmer {
  background: linear-gradient(90deg, #101726 0%, #1a253a 50%, #101726 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Diagrams Grid */
.diagrams-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.diagrams-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.diagrams-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.diagrams-counter-badge {
  font-size: 11px;
  font-weight: 700;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  padding: 2px 7px;
  border-radius: 10px;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.task-switch-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.task-nav-btn {
  background-color: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.task-nav-btn:hover {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
}

.active-task-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 4px 10px;
  border-radius: 12px;
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-family: var(--font-mono);
}

.diagrams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 10px;
  max-height: 240px;
  overflow-y: auto;
  padding: 4px;
}

.diagram-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 6px 6px 6px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.diagram-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-blue);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.45);
}

.diagram-card.active {
  border: 2px solid var(--accent-emerald);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.35);
  background: rgba(16, 185, 129, 0.08);
}

.card-num-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 2;
  font-family: var(--font-mono);
}

.diagram-thumb {
  width: 100%;
  height: 80px;
  object-fit: contain;
  border-radius: 4px;
  background-color: #0b101c;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.diagram-caption {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.diagram-turn-badge {
  font-size: 10px;
  color: var(--text-secondary);
  font-weight: 600;
}

.diagram-fen-badge {
  font-size: 9px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 4px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: help;
}

.diagram-status-pill {
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  align-self: center;
}

.diagram-status-pill.solved {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.diagram-status-pill.unsolved {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.diagram-confidence-badge {
  font-size: 9px;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 6px;
  padding: 1px 5px;
  margin-top: 2px;
  align-self: center;
}

.diagram-healed-badge {
  font-size: 9px;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.18);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 6px;
  padding: 2px 5px;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 95%;
  cursor: help;
}

.task-healed-banner {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 6px;
  padding: 4px 8px;
  margin-bottom: 6px;
}

.card-actions-row {
  display: flex;
  gap: 4px;
  justify-content: center;
  margin-top: 2px;
}

.card-action-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 9px;
  font-weight: 600;
  padding: 2px 5px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
  flex: 1;
}

.card-action-btn:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

/* Textarea Preview */
.editor-wrapper {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.editor-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.editor-header-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.editor-stats-badge {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.editor-actions {
  display: flex;
  gap: 8px;
}

.editor-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.editor-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.textarea-relative {
  position: relative;
  flex: 1;
}

.ocr-textarea {
  width: 100%;
  min-height: 200px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  padding: 14px;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.ocr-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

/* Action Button */
.btn-primary {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-primary-kbd {
  font-size: 11px;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.25);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-left: auto;
}

/* SIDE-BY-SIDE SECTION */
.side-by-side-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 12px;
}

.side-by-side-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}

@media (max-width: 950px) {
  .side-by-side-container {
    grid-template-columns: 1fr;
  }
}

.scan-column, .board-column {
  display: flex;
  flex-direction: column;
}

.scan-header, .board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.scan-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scan-title, .board-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.scan-badge, .board-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* Scan Toolbar */
.scan-toolbar {
  display: flex;
  align-items: center;
  gap: 5px;
}

.scan-zoom-level {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid rgba(6, 182, 212, 0.25);
  min-width: 42px;
  text-align: center;
  user-select: none;
}

.scan-tool-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.scan-tool-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.scan-inspect-btn {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  border-color: rgba(59, 130, 246, 0.3);
}

.scan-inspect-btn:hover {
  background: var(--accent-blue);
  color: #fff;
}

.scan-img-wrapper {
  flex: 1;
  min-height: 330px;
  max-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  touch-action: none;
}

.side-by-side-scan {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.15s cubic-bezier(0.2, 0, 0, 1);
  cursor: zoom-in;
  user-select: none;
  touch-action: none;
  transform-origin: center center;
  will-change: transform;
}

.side-by-side-scan.zoomed {
  cursor: grab;
}

.side-by-side-scan.grabbing {
  cursor: grabbing !important;
}

.scan-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  text-align: center;
  padding: 24px;
}

.placeholder-icon {
  font-size: 34px;
  opacity: 0.7;
}

.placeholder-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.placeholder-subtitle {
  font-size: 12px;
}

/* Board Column & Chessboard Styling */
.board-container-outer {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.board-container {
  width: 100%;
  max-width: 410px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.1);
  background: #182234;
  touch-action: none;
}

#board, #modalBoard {
  width: 100% !important;
  touch-action: none !important;
}

.chessboard-63f37, .square-55d63 {
  touch-action: none !important;
  user-select: none;
  -webkit-touch-callout: none;
}

/* Modern High-Contrast Chessboard Squares */
.white-1e1d7 {
  background-color: #dee3e6 !important;
  color: #8ca2ad !important;
}

.black-3c85d {
  background-color: #8ca2ad !important;
  color: #dee3e6 !important;
}

/* High-Contrast Board Coordinates */
.notation-322f9 {
  font-family: var(--font-mono) !important;
  font-size: 11px !important;
  font-weight: 800 !important;
  opacity: 0.9 !important;
  user-select: none !important;
  pointer-events: none !important;
}

.white-1e1d7 .notation-322f9 {
  color: #5b6f84 !important;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

.black-3c85d .notation-322f9 {
  color: #f1f5f9 !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
}

.alpha-d2270 {
  bottom: 2px !important;
  right: 4px !important;
}

.numeric-fc462 {
  top: 2px !important;
  left: 4px !important;
}

/* Legal Move Highlights on Chessboard */
.highlight-legal {
  position: relative;
  box-shadow: inset 0 0 0 2px rgba(16, 185, 129, 0.75) !important;
}

.highlight-legal::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background-color: rgba(16, 185, 129, 0.85);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.8);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10;
  animation: legalPulse 1.2s infinite ease-in-out;
}

@keyframes legalPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.85; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

/* Legal Capture Highlights on Chessboard (Hollow target ring around enemy piece) */
.highlight-capture {
  position: relative;
  box-shadow: inset 0 0 0 2px rgba(239, 68, 68, 0.85) !important;
}

.highlight-capture::after {
  content: '' !important;
  position: absolute !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
  width: 82% !important;
  height: 82% !important;
  background-color: transparent !important;
  border: 4px solid rgba(239, 68, 68, 0.85) !important;
  border-radius: 50% !important;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.5) !important;
  pointer-events: none !important;
  z-index: 10 !important;
  animation: capturePulse 1.2s infinite ease-in-out !important;
}

@keyframes capturePulse {
  0%, 100% { transform: translate(-50%, -50%) scale(0.96); opacity: 0.85; }
  50% { transform: translate(-50%, -50%) scale(1.04); opacity: 1; }
}

/* Controls Bar */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-card);
  padding: 8px 14px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
  width: fit-content;
  margin: 12px auto 0 auto;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
}

.ctrl-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.ctrl-btn:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
  transform: scale(1.08);
}

.ctrl-btn:active {
  transform: scale(0.95);
}

.ctrl-btn.play-btn {
  width: 42px;
  height: 42px;
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.4);
}

.ctrl-btn.play-btn:hover {
  background: var(--accent-blue-hover);
  transform: scale(1.08);
}

.ctrl-divider {
  width: 1px;
  height: 20px;
  background: var(--border-color);
  margin: 0 2px;
}

.ctrl-btn.speed-btn {
  width: auto;
  padding: 0 10px;
  border-radius: 14px;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.turn-pill {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 12px;
  background: var(--bg-input);
  border-radius: 14px;
  border: 1px solid var(--border-color);
}

/* FEN EDITOR SECTION - Emil Kowalski Physics */
#fenEditorSection,
.fen-editor-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 12px;
  animation: emilSpoilerIn 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
  will-change: transform, opacity;
}

@keyframes emilSpoilerIn {
  0% {
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.fen-editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.fen-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.fen-status-pill {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  transition: all 0.2s ease;
}

.fen-status-pill.status-valid {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.fen-status-pill.status-invalid {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.35);
}

.fen-status-pill.status-check {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.fen-input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fen-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.fen-input {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 36px 8px 12px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.fen-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.25);
}

.fen-copy-icon-btn {
  position: absolute;
  right: 6px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 14px;
  transition: color 0.15s;
}

.fen-copy-icon-btn:hover {
  color: var(--text-primary);
}

.fen-buttons-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-fen-action {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-fen-apply {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.btn-fen-apply:hover {
  background: var(--accent-blue-hover);
  transform: translateY(-1px);
}

.btn-fen-toggle {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-fen-toggle:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-fen-reset {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.btn-fen-reset:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-fen-save {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.4);
  margin-left: auto;
}

.btn-fen-save:hover {
  background: rgba(16, 185, 129, 0.25);
}

/* MOVES TABLE */
.moves-container {
  max-height: 190px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-input);
}

.moves-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: var(--font-mono);
}

.moves-table th {
  background: var(--bg-card);
  padding: 8px 14px;
  text-align: left;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 5;
}

.moves-table td {
  padding: 6px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.moves-empty-cell {
  text-align: center;
  color: var(--text-muted);
  padding: 20px !important;
  font-family: var(--font-main);
  font-size: 13px;
}

.move-item {
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.move-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.move-item.active {
  background: rgba(59, 130, 246, 0.25);
  color: var(--accent-cyan);
  font-weight: 700;
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

.move-placeholder {
  color: var(--text-muted);
  font-style: italic;
  padding: 2px 4px;
}

.corr-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-amber);
  box-shadow: 0 0 6px var(--accent-amber);
}

/* CORRECTIONS BOX */
.corrections-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.corrections-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.corrections-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.corr-badge-count {
  font-size: 11px;
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.corrections-list {
  max-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.corr-empty-msg {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 8px;
}

.corr-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  animation: fadeIn 0.25s ease;
}

.corr-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.corr-num {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 700;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
}

.corr-orig {
  color: var(--accent-rose);
  text-decoration: line-through;
  font-family: var(--font-mono);
}

.corr-arrow {
  color: var(--text-muted);
  font-size: 10px;
}

.corr-fixed {
  color: var(--accent-emerald);
  font-weight: 700;
  font-family: var(--font-mono);
}

.corr-reason {
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 7px;
  border-radius: 4px;
}

/* DOWNLOAD BAR */
.download-bar {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

@media (max-width: 900px) {
  .download-bar {
    flex-wrap: wrap;
  }
}

.btn-secondary {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 12px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-download {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  border: none;
}

.btn-download:hover:not(:disabled) {
  background: linear-gradient(135deg, #047857, #059669);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-zip {
  background: linear-gradient(135deg, #7c3aed, #8b5cf6);
  color: white;
  border: none;
}

.btn-zip:hover:not(:disabled) {
  background: linear-gradient(135deg, #6d28d9, #7c3aed);
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

/* MODALS - Emil Kowalski (Linear / Vercel) Physics: cubic-bezier(0.16, 1, 0.3, 1) in 200ms */
.modal-backdrop,
#paymentModal,
#xrayModal,
#homeworkModal,
#calibrateModal,
#mediaCenterModal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: emilModalBackdropIn 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes emilModalBackdropIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-window,
.modal-payment-window,
#paymentModal .modal-window,
#xrayModal .modal-window,
#homeworkModal .modal-window {
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  width: 900px;
  max-width: 95vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.08);
  overflow: hidden;
  animation: emilModalWindowIn 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
  will-change: transform, opacity;
}

@keyframes emilModalWindowIn {
  0% {
    opacity: 0;
    transform: scale(0.96) translateY(8px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-window-sm {
  width: 550px;
}

.modal-header {
  padding: 16px 22px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  transition: color 0.15s;
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 22px;
  overflow-y: auto;
  flex: 1;
}

.modal-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .modal-split {
    grid-template-columns: 1fr;
  }
}

.modal-box-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.modal-img-container {
  min-height: 350px;
  max-height: 450px;
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: 10px;
  position: relative;
}

.modal-img-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.modal-board-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

#modalBoard {
  width: 100% !important;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  background: #182234;
}

.modal-footer {
  padding: 14px 22px;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.modal-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* Shortcuts Cheat Sheet Grid */
.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.shortcut-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.shortcut-keys kbd {
  background: #1e293b;
  border: 1px solid #334155;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 4px;
  box-shadow: 0 2px 0 #0f172a;
}

.shortcut-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Visual Board Piece Palette & Empire 4.0 Modals */
.piece-palette-panel {
  background: rgba(9, 13, 22, 0.75);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.palette-row,
.palette-tools-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.palette-group-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
}

.palette-piece-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 20px;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.palette-piece-btn:hover,
.palette-tool-btn:hover {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.18);
}

.palette-piece-btn.active,
.palette-tool-btn.active {
  border-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.25);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.palette-tool-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  height: auto;
  width: auto;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.palette-hint {
  margin-left: auto;
  font-size: 11.5px;
  color: var(--accent-cyan);
  font-weight: 600;
}

.xray-form-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.media-grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.media-video-card {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   SPARE PIECES PALETTE (Lichess Style Visual Board Editor)
   ========================================================================== */
.spare-pieces-palette {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  touch-action: none !important;
}

.palette-pieces-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.palette-piece-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(30, 41, 59, 0.8);
  color: #f8fafc;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  touch-action: none !important;
  line-height: 1;
}

.palette-piece-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

/* Active Glowing Blue Ring for Selected Palette Piece */
.palette-piece-btn.active,
.palette-tool-btn.palette-piece-btn.active {
  background: rgba(14, 165, 233, 0.25) !important;
  border: 2px solid #38bdf8 !important;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.45), 0 0 14px rgba(56, 189, 248, 0.4) !important;
  transform: translateY(-2px);
}

.palette-tool-btn {
  touch-action: none !important;
  user-select: none;
}

.palette-tool-btn.active:not(.palette-piece-btn) {
  background: rgba(14, 165, 233, 0.25) !important;
  border: 1px solid #38bdf8 !important;
  color: #38bdf8 !important;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.3) !important;
}

/* Drag & Drop Hover highlight on board square */
.square-drop-target {
  box-shadow: inset 0 0 0 3px #38bdf8 !important;
  background-color: rgba(56, 189, 248, 0.3) !important;
  transition: background-color 0.1s ease;
}

/* Scan Font Calibration Button */
.scan-calibrate-btn {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.25) 0%, rgba(5, 150, 105, 0.2) 100%) !important;
  border: 1px solid rgba(16, 185, 129, 0.45) !important;
  color: #34d399 !important;
  font-weight: 600 !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 5px !important;
  transition: all 0.2s ease !important;
}

.scan-calibrate-btn:hover {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.4) 0%, rgba(5, 150, 105, 0.35) 100%) !important;
  border-color: #34d399 !important;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.35) !important;
}

/* ==========================================================================
   MINIMALIST STUDENT HOMEWORK MODE (?hw=...)
   ========================================================================== */
.student-container {
  min-height: 100vh;
  background: radial-gradient(circle at 50% 20%, #0f172a 0%, #020617 100%);
  color: #f8fafc;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 9999;
}

.student-header {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

.student-header-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.student-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.student-icon {
  font-size: 28px;
}

.student-title {
  font-size: 16px;
  font-weight: 700;
  color: #f1f5f9;
}

.student-subtitle {
  font-size: 12px;
  color: #38bdf8;
  font-weight: 600;
}

.student-exit-btn {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #94a3b8;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.student-exit-btn:hover {
  background: rgba(51, 65, 85, 0.9);
  color: #f8fafc;
}

.student-progress-bar-bg {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  position: relative;
}

.student-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #0284c7 0%, #38bdf8 100%);
  transition: width 0.3s ease;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.6);
}

.student-main {
  flex: 1;
  max-width: 540px;
  width: 100%;
  margin: 0 auto;
  padding: 16px 16px 40px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.student-card {
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
}

.student-info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 10px;
  flex-wrap: wrap;
}

.student-turn-pill {
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12.5px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.student-turn-pill.turn-white {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
}

.student-turn-pill.turn-black {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #cbd5e1;
}

.student-goal-text {
  font-size: 13.5px;
  color: #38bdf8;
  font-weight: 600;
}

.student-board-wrapper {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(255, 255, 255, 0.1);
  touch-action: none !important;
}

.student-board,
#studentBoard,
#studentBoard .chessboard-63f37,
#studentBoard .square-55d63 {
  touch-action: none !important;
  user-select: none;
  -webkit-user-select: none;
}

.student-feedback {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.student-feedback.feedback-prompt {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
}

.student-feedback.feedback-success {
  background: rgba(16, 185, 129, 0.18);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.25);
}

.student-feedback.feedback-error {
  background: rgba(239, 68, 68, 0.18);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.25);
}

.student-actions-bar {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.student-action-btn {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
}

.student-action-btn.btn-retry {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.student-action-btn.btn-retry:hover {
  background: rgba(239, 68, 68, 0.35);
}

.student-action-btn.btn-next {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
}

.student-action-btn.btn-next:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
}

/* Victory Final Celebration Card */
.student-victory-card {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border: 2px solid rgba(16, 185, 129, 0.45);
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 24px rgba(16, 185, 129, 0.25);
  animation: victoryPop 0.4s ease-out;
}

@keyframes victoryPop {
  0% { transform: scale(0.92); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.victory-trophy {
  font-size: 64px;
  margin-bottom: 12px;
  animation: bounce 1.2s infinite ease-in-out alternate;
}

@keyframes bounce {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

.victory-title {
  font-size: 24px;
  font-weight: 800;
  color: #34d399;
  margin-bottom: 8px;
}

.victory-subtitle {
  font-size: 14px;
  color: #94a3b8;
  margin-bottom: 22px;
}

.victory-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hw-task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  transition: background 0.15s ease;
}

.hw-task-item:hover {
  background: rgba(30, 41, 59, 0.8);
}

/* ========================================================
   MONETIZATION, QUOTAS & PAYMENT MODAL STYLES (STAGE 3)
   ======================================================== */

/* Header Quota Status Badge */
.quota-badge-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.35);
  color: #38bdf8;
  font-weight: 700;
  padding: 5px 11px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

.quota-badge-btn:hover {
  background: rgba(14, 165, 233, 0.22);
  border-color: #38bdf8;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.25);
}

.quota-badge-btn.badge-vip {
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.2) 0%, rgba(245, 158, 11, 0.25) 100%);
  border-color: rgba(234, 179, 8, 0.55);
  color: #fde047;
  box-shadow: 0 0 16px rgba(234, 179, 8, 0.2);
}

.quota-badge-btn.badge-coach {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2) 0%, rgba(147, 51, 234, 0.25) 100%);
  border-color: rgba(168, 85, 247, 0.55);
  color: #d8b4fe;
  box-shadow: 0 0 16px rgba(168, 85, 247, 0.2);
}

.quota-badge-btn.badge-warning {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.45);
  color: #fca5a5;
  animation: pulseWarning 2s infinite;
}

@keyframes pulseWarning {
  0%, 100% { box-shadow: 0 0 0 rgba(239, 68, 68, 0); }
  50% { box-shadow: 0 0 14px rgba(239, 68, 68, 0.4); }
}

/* Payment Modal Window */
.modal-payment-window {
  max-width: 820px;
  width: 95%;
  background: linear-gradient(180deg, #131c2e 0%, #0b1120 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.75), 0 0 35px rgba(14, 165, 233, 0.15);
}

/* Quota Alert Banner */
.quota-alert-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(90deg, rgba(239, 68, 68, 0.15) 0%, rgba(225, 29, 72, 0.1) 100%);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 20px;
}

.quota-alert-icon {
  font-size: 26px;
  flex-shrink: 0;
}

.quota-alert-title {
  font-size: 15px;
  font-weight: 700;
  color: #fca5a5;
  margin-bottom: 2px;
}

.quota-alert-desc {
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.4;
}

/* Tariff Grid */
.tariff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.tariff-card {
  position: relative;
  background: rgba(30, 41, 59, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.tariff-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
  background: rgba(30, 41, 59, 0.85);
}

.tariff-card.active {
  border-color: #38bdf8;
  background: rgba(14, 165, 233, 0.08);
  box-shadow: 0 0 25px rgba(14, 165, 233, 0.2);
}

.tariff-card-featured {
  border-color: rgba(245, 158, 11, 0.4);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, rgba(30, 41, 59, 0.7) 100%);
}

.tariff-card-featured.active {
  border-color: #f59e0b;
  box-shadow: 0 0 30px rgba(245, 158, 11, 0.25);
}

.tariff-featured-badge {
  position: absolute;
  top: -12px;
  right: 18px;
  background: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(245, 158, 11, 0.4);
}

.tariff-card-header {
  margin-bottom: 12px;
}

.tariff-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.tariff-badge-pro {
  color: #fbbf24;
}

.tariff-title {
  font-size: 18px;
  font-weight: 800;
  color: #f8fafc;
  margin: 0 0 2px 0;
}

.tariff-subtitle {
  font-size: 12px;
  color: #94a3b8;
}

.tariff-price-block {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 14px;
}

.tariff-price-amount {
  font-size: 26px;
  font-weight: 900;
  color: #38bdf8;
  font-family: var(--font-mono, monospace);
}

.tariff-card-featured .tariff-price-amount {
  color: #fbbf24;
}

.tariff-price-currency {
  font-size: 13px;
  color: #94a3b8;
}

.tariff-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 18px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.tariff-features-list li {
  font-size: 13px;
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.4;
}

.f-check {
  color: #10b981;
  font-weight: 800;
  font-size: 14px;
}

.btn-select-tariff {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #f1f5f9;
  font-weight: 700;
  font-size: 13.5px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-select-tariff:hover {
  background: #0284c7;
  border-color: #38bdf8;
  color: #ffffff;
}

.tariff-card.active .btn-select-tariff {
  background: #0284c7;
  border-color: #38bdf8;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
}

.btn-select-featured {
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fef08a;
}

.btn-select-featured:hover {
  background: #f59e0b;
  border-color: #fbbf24;
  color: #0f172a;
}

.tariff-card-featured.active .btn-select-featured {
  background: #f59e0b;
  border-color: #fbbf24;
  color: #0f172a;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.45);
}

/* Payment Methods Section */
.payment-methods-section {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 20px;
}

.payment-tabs-header {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 12px;
  flex-wrap: wrap;
}

.payment-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  color: #94a3b8;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.payment-tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #f1f5f9;
}

.payment-tab-btn.active {
  background: rgba(14, 165, 233, 0.15);
  border-color: #38bdf8;
  color: #38bdf8;
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.2);
}

.tab-flag {
  font-size: 15px;
}

/* Kaspi Box */
.kaspi-payment-box {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}

.kaspi-qr-wrapper {
  position: relative;
  width: 170px;
  height: 170px;
  background: #ffffff;
  border-radius: 12px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
}

.kaspi-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 6px;
}

.qr-loading-spinner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  color: #0f172a;
  font-size: 12px;
  font-weight: 600;
  gap: 6px;
}

.kaspi-details {
  flex: 1;
  min-width: 250px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.kaspi-amount-label {
  font-size: 12px;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kaspi-amount-val {
  font-size: 28px;
  font-weight: 900;
  color: #f43f5e;
  font-family: var(--font-mono, monospace);
  line-height: 1;
}

.kaspi-order-id {
  font-size: 11.5px;
  color: #64748b;
  font-family: var(--font-mono, monospace);
}

.kaspi-instruction-text {
  font-size: 12.5px;
  color: #cbd5e1;
  line-height: 1.4;
  background: rgba(255, 255, 255, 0.04);
  padding: 8px 12px;
  border-radius: 6px;
}

.kaspi-mobile-action {
  margin-top: 4px;
}

.btn-kaspi-pay {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 18px;
  background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 14px;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(225, 29, 72, 0.35);
  transition: all 0.2s ease;
}

.btn-kaspi-pay:hover {
  background: linear-gradient(135deg, #fb7185 0%, #f43f5e 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(225, 29, 72, 0.5);
}

.kaspi-status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  font-size: 12px;
  color: #94a3b8;
  flex-wrap: wrap;
}

/* Stripe Box */
.stripe-payment-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stripe-currency-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #cbd5e1;
}

.currency-pills {
  display: flex;
  gap: 6px;
}

.currency-pill {
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.currency-pill.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: #38bdf8;
  color: #38bdf8;
}

.stripe-summary {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 12px 16px;
}

.stripe-tariff-name {
  font-size: 15px;
  font-weight: 700;
  color: #f8fafc;
}

.stripe-price-val {
  font-size: 24px;
  font-weight: 800;
  color: #38bdf8;
  font-family: var(--font-mono, monospace);
  margin: 4px 0;
}

.stripe-desc {
  font-size: 12px;
  color: #94a3b8;
}

.stripe-sandbox-notice {
  background: rgba(234, 179, 8, 0.12);
  border: 1px solid rgba(234, 179, 8, 0.3);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 12px;
  color: #fde047;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-stripe-pay {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 18px;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 14.5px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
  transition: all 0.2s ease;
}

.btn-stripe-pay:hover {
  background: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

/* VIP Promocode Section */
.vip-promocode-section {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

.promocode-box {
  background: rgba(30, 41, 59, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 10px;
  padding: 12px 16px;
}

.promocode-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.promo-title {
  font-size: 13px;
  font-weight: 700;
  color: #f1f5f9;
}

.promo-hint {
  font-size: 11.5px;
  color: #94a3b8;
}

.promocode-input-row {
  display: flex;
  gap: 8px;
}

.promo-input {
  flex: 1;
  text-transform: uppercase;
  font-family: var(--font-mono, monospace);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.promo-apply-btn {
  white-space: nowrap;
  padding: 8px 18px;
}

.promo-result-msg {
  margin-top: 8px;
  font-size: 12.5px;
  padding: 6px 10px;
  border-radius: 6px;
}

.promo-result-msg.success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.promo-result-msg.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

@media (max-width: 640px) {
  .kaspi-payment-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .kaspi-status-bar {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .promocode-input-row {
    flex-direction: column;
  }
  .promo-apply-btn {
    width: 100%;
    justify-content: center;
  }
  .tariff-price-amount {
    font-size: 22px;
  }
  .payment-modal {
    width: 98%;
    padding: 8px;
  }
}




/* ==========================================================================
   LINEAR / APPLE DARK UI REDESIGN FOR STAGE 4
   ========================================================================== */

/* Top Header & Segmented Navbar Tabs */
.app-header {
  padding: 8px 24px !important;
}

.header-inner {
  max-width: 1320px !important;
  width: 100% !important;
  margin: 0 auto !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 10px !important;
  box-sizing: border-box !important;
}

.nav-tabs {
  display: flex;
  align-items: center;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3px;
  border-radius: 24px;
  gap: 3px;
}

.nav-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: all 180ms cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.nav-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-tab.active {
  background: var(--accent-blue);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(59, 130, 246, 0.35);
}

.header-icon-btn {
  height: 34px;
  min-width: 38px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 12px;
  font-weight: 600;
  padding: 0 12px;
  white-space: nowrap;
  flex-shrink: 0;
  box-sizing: border-box;
}

.header-icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateY(-1px);
}

.tab-view-content {
  width: 100%;
}

.tab-view-content.active,
.payment-tab-pane.active {
  animation: emilTabIn 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
  will-change: transform, opacity;
}

@keyframes emilTabIn {
  0% {
    opacity: 0;
    transform: translateY(4px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* App Container */
.app-container {
  display: flex !important;
  flex-direction: column !important;
  max-width: 1600px !important;
  margin: 0 auto !important;
  padding: 10px 20px !important;
  width: 100% !important;
  gap: 0 !important;
}

.tab-view-content {
  width: 100%;
}

/* 1. HERO UPLOAD SECTION */
.hero-upload-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0 40px;
  width: 100%;
}

.hero-card {
  max-width: 760px;
  width: 100%;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 18px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: #38bdf8;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  align-self: center;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
}

.hero-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #f8fafc;
  line-height: 1.25;
}

.hero-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 620px;
  margin: 0 auto;
}

.hero-page-select-wrapper {
  display: flex;
  justify-content: center;
}

.hero-convert-btn {
  width: 100%;
  height: 44px !important;
  font-size: 14px !important;
}

.hero-manual-text-details {
  background: rgba(10, 15, 29, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  text-align: left;
}

.hero-manual-text-summary {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease;
}

.hero-manual-text-summary:hover {
  color: var(--text-primary);
}

.hero-editor-wrapper {
  margin-top: 12px;
}

/* 2. WORKSPACE SECTION */
.workspace-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.workspace-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 6px 14px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.workspace-strip .page-select-bar {
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  box-shadow: none !important;
  gap: 8px !important;
}

.workspace-strip-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.workspace-file-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: #38bdf8;
  padding: 5px 12px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
}

.strip-file-name {
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workspace-strip-center {
  display: flex;
  align-items: center;
}

.workspace-strip-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Strict 3-Column Workspace Grid */
.workspace-grid {
  display: grid !important;
  grid-template-columns: 240px 1fr 340px !important;
  gap: 20px !important;
  align-items: start !important;
  width: 100% !important;
}

@media (max-width: 1280px) {
  .workspace-grid {
    grid-template-columns: 220px 1fr 300px !important;
    gap: 14px !important;
  }
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
}

/* LEFT COLUMN (240px) */
/* LEFT COLUMN (240px) */
.workspace-col-left {
  width: 240px !important;
  min-width: 240px !important;
}

@media (max-width: 1024px) {
  .workspace-col-left {
    width: 100% !important;
    min-width: unset !important;
  }
}

.panel-card {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.col-left-card {
  height: calc(100vh - 160px) !important;
  max-height: 840px !important;
  min-height: 520px !important;
  display: flex !important;
  flex-direction: column !important;
  padding: 12px !important;
  gap: 10px !important;
  overflow: hidden !important;
}

@media (max-width: 1024px) {
  .col-left-card {
    height: auto !important;
    max-height: none !important;
    min-height: unset !important;
  }
}

.card-header-compact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0 !important;
}

.card-header-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.task-switch-nav-compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  padding: 3px 6px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.task-nav-btn-sm {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(30, 41, 59, 0.7);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 11px;
}

.task-nav-btn-sm:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.active-task-badge-sm {
  font-size: 11.5px;
  font-weight: 700;
  color: #38bdf8;
  font-family: var(--font-mono);
}

.diagrams-container {
  flex: 1 1 auto !important;
  min-height: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

.diagrams-grid-vertical {
  flex: 1 1 auto !important;
  min-height: 0 !important;
  max-height: none !important;
  overflow-y: auto !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 8px !important;
  padding-right: 4px !important;
}

@media (max-width: 1024px) {
  .diagrams-grid-vertical {
    max-height: 320px !important;
  }
}

/* DIAGRAM CARDS */
.diagram-card {
  flex-shrink: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 4px !important;
  padding: 8px 8px 6px !important;
  height: auto !important;
  min-height: unset !important;
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-sm) !important;
  position: relative !important;
  overflow: hidden !important;
  cursor: pointer !important;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.diagram-card:hover {
  transform: translateY(-2px) !important;
  border-color: var(--accent-blue) !important;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.45) !important;
}

.diagram-card.active {
  border: 2px solid var(--accent-emerald) !important;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.35) !important;
  background: rgba(16, 185, 129, 0.08) !important;
}

.diagram-thumb {
  width: 100% !important;
  height: 94px !important;
  object-fit: contain !important;
  border-radius: 4px !important;
  background-color: #080c14 !important;
  border: 1px solid rgba(255, 255, 255, 0.06) !important;
}

.diagram-caption {
  font-size: 11.5px !important;
  font-weight: 700 !important;
  color: var(--text-primary) !important;
  margin-top: 2px !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
}

.diagram-turn-badge {
  font-size: 10.5px !important;
  color: var(--text-secondary) !important;
  font-weight: 600 !important;
}

.diagram-fen-badge {
  font-size: 9.5px !important;
  font-family: var(--font-mono) !important;
  color: #cbd5e1 !important;
  background: rgba(255, 255, 255, 0.04) !important;
  padding: 2px 4px !important;
  border-radius: 4px !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  cursor: help !important;
}

.diagram-confidence-badge {
  font-size: 9.5px !important;
  font-weight: 600 !important;
  color: #38bdf8 !important;
}

.diagram-status-pill {
  font-size: 9.5px !important;
  font-weight: 700 !important;
  padding: 2px 6px !important;
  border-radius: 8px !important;
  align-self: center !important;
}

.card-actions-row {
  display: flex !important;
  gap: 4px !important;
  justify-content: center !important;
  margin-top: 2px !important;
}

.card-action-btn {
  font-size: 10px !important;
  padding: 2px 8px !important;
  height: 22px !important;
  border-radius: 4px !important;
  background: rgba(255, 255, 255, 0.05) !important;
  color: #94a3b8 !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  cursor: pointer !important;
  transition: all 0.15s ease !important;
}

.card-action-btn:hover {
  background: var(--accent-blue) !important;
  color: #fff !important;
  border-color: var(--accent-blue) !important;
}

.col-left-bottom-actions {
  flex-shrink: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
  padding-top: 8px !important;
  border-top: 1px solid rgba(255, 255, 255, 0.08) !important;
  margin-top: auto !important;
}

.col-left-bottom-actions button {
  height: 36px !important;
  font-size: 12px !important;
  font-weight: 600 !important;
}

/* CENTER COLUMN (1fr) & SIDE-BY-SIDE 1:1 */
.workspace-col-center {
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
  min-width: 0 !important;
}

.side-by-side-grid {
  display: grid !important;
  grid-template-columns: 1fr 1fr !important;
  gap: 16px !important;
  align-items: start !important;
}

@media (max-width: 850px) {
  .side-by-side-grid {
    grid-template-columns: 1fr !important;
  }
}

.scan-column, .board-column {
  display: flex !important;
  flex-direction: column !important;
  background: rgba(15, 23, 42, 0.75) !important;
  backdrop-filter: blur(14px) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  overflow: hidden !important;
  box-shadow: var(--shadow-card) !important;
}

.scan-header, .board-header {
  height: 40px !important;
  min-height: 40px !important;
  padding: 0 10px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  border-bottom: 1px solid var(--border-color) !important;
  background: rgba(255, 255, 255, 0.02) !important;
  white-space: nowrap !important;
  margin-bottom: 0 !important;
}

.scan-header-left, .board-header-left {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  white-space: nowrap !important;
}

.scan-title, .board-title {
  font-size: 12.5px !important;
  font-weight: 700 !important;
  color: var(--text-primary) !important;
  white-space: nowrap !important;
}

.scan-badge, .board-badge {
  font-size: 11px !important;
  padding: 2px 6px !important;
  border-radius: 12px !important;
}

.scan-toolbar {
  display: flex !important;
  align-items: center !important;
  gap: 3px !important;
  white-space: nowrap !important;
}

.scan-tool-btn {
  width: 26px !important;
  height: 26px !important;
  min-width: 26px !important;
  padding: 0 !important;
  font-size: 11px !important;
  border-radius: 4px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  color: var(--text-secondary) !important;
  cursor: pointer !important;
}

.scan-tool-btn:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  color: #fff !important;
}

.scan-zoom-level {
  font-size: 11px !important;
  font-weight: 700 !important;
  color: #38bdf8 !important;
  min-width: 32px !important;
  text-align: center !important;
}

/* CRITICAL: Scan container and board container strictly 1:1 aspect ratio */
.scan-img-wrapper, .board-container-outer {
  width: 100% !important;
  aspect-ratio: 1 / 1 !important;
  min-height: unset !important;
  max-height: unset !important;
  position: relative !important;
  overflow: hidden !important;
  background: #090d16 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  touch-action: none !important;
  border: none !important;
  border-radius: 0 !important;
}

.board-container {
  width: 100% !important;
  height: 100% !important;
  max-width: unset !important;
  aspect-ratio: 1 / 1 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  touch-action: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  background: transparent !important;
}

#board {
  width: 100% !important;
  height: 100% !important;
  touch-action: none !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

.chessboard-63f37 {
  border: none !important;
  box-sizing: border-box !important;
  touch-action: none !important;
}

/* BOARD HEADER RIGHT & ORIENTATION TOGGLE */
.board-header-right {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
}

.board-orientation-btn {
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  padding: 4px 10px !important;
  font-size: 11.5px !important;
  font-weight: 700 !important;
  font-family: var(--font-main) !important;
  border-radius: var(--radius-sm) !important;
  cursor: pointer !important;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1) !important;
  user-select: none !important;
  border: 1px solid transparent !important;
  white-space: nowrap !important;
  line-height: 1.2 !important;
}

.board-orientation-btn.is-white-orientation {
  background: rgba(16, 185, 129, 0.14) !important;
  border-color: rgba(16, 185, 129, 0.45) !important;
  color: #34d399 !important;
}

.board-orientation-btn.is-white-orientation:hover {
  background: rgba(16, 185, 129, 0.26) !important;
  border-color: #34d399 !important;
  color: #ffffff !important;
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.4) !important;
}

.board-orientation-btn.is-black-orientation {
  background: rgba(245, 158, 11, 0.18) !important;
  border-color: rgba(245, 158, 11, 0.5) !important;
  color: #fbbf24 !important;
}

.board-orientation-btn.is-black-orientation:hover {
  background: rgba(245, 158, 11, 0.3) !important;
  border-color: #fbbf24 !important;
  color: #ffffff !important;
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.4) !important;
}

.orientation-btn-icon {
  font-size: 13px !important;
}

.orientation-btn-text {
  font-size: 11.5px !important;
  font-weight: 700 !important;
}

/* SYNCHRONOUS LASER HOVER CROSSHAIR */
.scan-crosshair-overlay {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  pointer-events: none !important;
  transform-origin: center center !important;
  transition: transform 0.15s cubic-bezier(0.2, 0, 0, 1) !important;
  z-index: 10 !important;
  will-change: transform !important;
}

.scan-crosshair-box {
  position: absolute !important;
  border: 2.5px solid #00f0ff !important;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.85),
              0 0 14px rgba(0, 240, 255, 0.95),
              inset 0 0 10px rgba(0, 240, 255, 0.4) !important;
  background: rgba(0, 240, 255, 0.15) !important;
  box-sizing: border-box !important;
  border-radius: 2px !important;
  transition: left 0.06s ease-out, top 0.06s ease-out !important;
  animation: laserCrosshairPulse 1.8s infinite ease-in-out !important;
  pointer-events: none !important;
}

@keyframes laserCrosshairPulse {
  0%, 100% {
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.85),
                0 0 14px rgba(0, 240, 255, 0.95),
                inset 0 0 10px rgba(0, 240, 255, 0.4);
  }
  50% {
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.95),
                0 0 22px rgba(0, 240, 255, 1),
                inset 0 0 14px rgba(0, 240, 255, 0.65);
  }
}

.scan-crosshair-label {
  position: absolute !important;
  bottom: 2px !important;
  right: 2px !important;
  background: rgba(2, 132, 199, 0.95) !important;
  color: #ffffff !important;
  font-family: var(--font-mono) !important;
  font-size: 10px !important;
  font-weight: 800 !important;
  line-height: 1 !important;
  padding: 2px 4px !important;
  border-radius: 3px !important;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.7) !important;
  user-select: none !important;
  pointer-events: none !important;
  letter-spacing: 0.5px !important;
  text-transform: lowercase !important;
}

#board .square-55d63.crosshair-board-active,
#modalBoard .square-55d63.crosshair-board-active {
  box-shadow: inset 0 0 0 3px #00f0ff,
              0 0 14px rgba(0, 240, 255, 0.85) !important;
  z-index: 5 !important;
  position: relative !important;
}


/* Replay controls */
.controls-bar {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 6px !important;
  background: rgba(15, 23, 42, 0.75) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  padding: 5px 12px !important;
  height: 42px !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2) !important;
  box-sizing: border-box !important;
}

.ctrl-btn {
  width: 34px !important;
  height: 30px !important;
  border-radius: 6px !important;
  font-size: 13px !important;
  font-weight: 700 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  background: rgba(30, 41, 59, 0.7) !important;
  color: var(--text-primary) !important;
  cursor: pointer !important;
}

.ctrl-btn:hover {
  background: var(--accent-blue) !important;
  color: #fff !important;
  border-color: var(--accent-blue) !important;
}

.ctrl-btn.play-btn {
  width: 44px !important;
  height: 30px !important;
  font-size: 14px !important;
  background: var(--accent-blue) !important;
  color: #fff !important;
  border-color: var(--accent-blue) !important;
}

.ctrl-btn.speed-btn {
  width: 36px !important;
  font-size: 11px !important;
  font-weight: 700 !important;
}

.ctrl-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.1);
  margin: 0 2px;
}

.fen-toggle-wrapper {
  display: flex !important;
  justify-content: center !important;
  margin-top: 0 !important;
}

.btn-toggle-editor {
  background: rgba(30, 41, 59, 0.75) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
  color: var(--text-primary) !important;
  font-family: inherit !important;
  font-size: 12.5px !important;
  font-weight: 600 !important;
  padding: 5px 16px !important;
  height: 32px !important;
  border-radius: 18px !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 7px !important;
  white-space: nowrap !important;
  transition: all 0.2s ease !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2) !important;
}

.btn-toggle-editor:hover,
.btn-toggle-editor.active {
  background: rgba(56, 189, 248, 0.15) !important;
  border-color: rgba(56, 189, 248, 0.4) !important;
  color: #38bdf8 !important;
  transform: translateY(-1px) !important;
}

.btn-toggle-editor .toggle-arrow {
  font-size: 12px;
  transition: transform 0.2s ease;
}

/* FEN Drawer & Spare Pieces Palette (Compact 2-row layout) */
.fen-editor-section {
  background: rgba(15, 23, 42, 0.85) !important;
  backdrop-filter: blur(14px) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  padding: 8px 12px !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3) !important;
  margin-bottom: 0 !important;
}

.fen-editor-section:not([style*="display: none"]) {
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
}

.fen-editor-header {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 8px !important;
  padding-bottom: 4px !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06) !important;
}

.fen-label {
  font-size: 12px !important;
  font-weight: 700 !important;
}

.spare-pieces-palette {
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
  padding: 2px 0 !important;
  background: transparent !important;
  border: none !important;
  margin-top: 0 !important;
  touch-action: none !important;
}

.palette-row {
  display: flex !important;
  align-items: center !important;
  gap: 5px !important;
  flex-wrap: wrap !important;
}

.palette-pieces-row {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 8px !important;
}

.palette-color-group {
  display: flex !important;
  align-items: center !important;
  gap: 3px !important;
}

.palette-label {
  font-size: 12px !important;
  margin-right: 2px !important;
  opacity: 0.85 !important;
}

.palette-divider-vertical {
  width: 1px !important;
  height: 24px !important;
  background: rgba(255, 255, 255, 0.12) !important;
  margin: 0 3px !important;
}

.palette-piece-btn {
  width: 30px !important;
  height: 30px !important;
  min-width: 30px !important;
  border-radius: 6px !important;
  border: 1px solid rgba(255, 255, 255, 0.12) !important;
  background: rgba(30, 41, 59, 0.8) !important;
  color: #f8fafc !important;
  font-size: 19px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer !important;
  transition: all 0.15s ease !important;
  user-select: none !important;
  touch-action: none !important;
  line-height: 1 !important;
}

.palette-piece-btn:hover {
  background: rgba(56, 189, 248, 0.15) !important;
  border-color: rgba(56, 189, 248, 0.4) !important;
  transform: translateY(-1px) !important;
}

.palette-piece-btn.active,
.palette-tool-btn.palette-piece-btn.active {
  background: rgba(14, 165, 233, 0.25) !important;
  border: 2px solid #38bdf8 !important;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.45), 0 0 14px rgba(56, 189, 248, 0.4) !important;
  transform: translateY(-1px) !important;
}

.palette-tools-row {
  display: flex !important;
  align-items: center !important;
  gap: 5px !important;
  flex-wrap: wrap !important;
}

.palette-tool-btn {
  height: 28px !important;
  padding: 0 8px !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  border-radius: 5px !important;
  border: 1px solid rgba(255, 255, 255, 0.12) !important;
  background: rgba(30, 41, 59, 0.8) !important;
  color: var(--text-primary) !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
  cursor: pointer !important;
  white-space: nowrap !important;
  touch-action: none !important;
  transition: all 0.15s ease !important;
}

.palette-tool-btn:hover {
  background: rgba(255, 255, 255, 0.08) !important;
  border-color: rgba(255, 255, 255, 0.2) !important;
}

.palette-tool-btn.active:not(.palette-piece-btn) {
  background: rgba(14, 165, 233, 0.25) !important;
  border: 1px solid #38bdf8 !important;
  color: #38bdf8 !important;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.3) !important;
}

.palette-tool-btn.palette-eraser-btn {
  width: auto !important;
  height: 28px !important;
  font-size: 11px !important;
  padding: 0 8px !important;
}

.palette-hint {
  font-size: 10.5px !important;
  color: var(--accent-cyan) !important;
  margin-left: auto !important;
  font-weight: 500 !important;
  white-space: nowrap !important;
}

.fen-input-group {
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
}

.fen-input-wrapper {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
}

.fen-input {
  height: 30px !important;
  font-size: 11px !important;
  padding: 4px 8px !important;
  font-family: var(--font-mono) !important;
}

.fen-copy-icon-btn {
  height: 30px !important;
  width: 30px !important;
  min-width: 30px !important;
  padding: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  border-radius: 6px !important;
}

.fen-buttons-row {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  flex-wrap: wrap !important;
}

.btn-fen-action {
  height: 28px !important;
  padding: 0 8px !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  border-radius: 6px !important;
}

/* RIGHT COLUMN (340px) */
.workspace-col-right {
  width: 340px !important;
  min-width: 340px !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 10px !important;
  height: calc(100vh - 160px) !important;
  max-height: 840px !important;
  min-height: 520px !important;
  overflow-y: auto !important;
  padding-right: 2px !important;
}

@media (max-width: 1024px) {
  .workspace-col-right {
    width: 100% !important;
    min-width: unset !important;
    height: auto !important;
    max-height: none !important;
    min-height: unset !important;
  }
}

.col-right-card {
  padding: 12px !important;
  gap: 8px !important;
  flex-shrink: 0 !important;
}

.card-header-icon {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 14px !important;
  line-height: 1 !important;
  margin-right: 2px !important;
}

.moves-container {
  max-height: 240px !important;
  overflow-y: auto !important;
  border-radius: 6px !important;
  border: 1px solid rgba(255, 255, 255, 0.06) !important;
  background: rgba(10, 15, 29, 0.6) !important;
}

.corrections-section {
  max-height: 130px !important;
  overflow-y: auto !important;
  padding-right: 2px !important;
}

.col-right-actions {
  flex-shrink: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 6px !important;
  margin-top: auto !important;
}

.col-right-actions button {
  height: 36px !important;
  font-size: 12px !important;
  font-weight: 600 !important;
}

/* TABS 2 & 3 WORKSPACES */
.secondary-workspace-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  padding-top: 10px;
}

.secondary-tab-hero {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  box-shadow: var(--shadow-card);
}

.secondary-tab-header {
  display: flex;
  align-items: center;
  gap: 16px;
}

.secondary-tab-icon {
  font-size: 30px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.secondary-tab-title {
  font-size: 20px;
  font-weight: 800;
  color: #f8fafc;
}

.secondary-tab-subtitle {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.features-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 850px) {
  .features-cards-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-card-icon {
  font-size: 24px;
  margin-bottom: 4px;
}

.feature-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.feature-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.45;
}

.tools-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 850px) {
  .tools-split-grid {
    grid-template-columns: 1fr;
  }
}

.tool-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tool-card-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: #38bdf8;
  letter-spacing: 0.05em;
}

.tool-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.tool-card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.w-100 {
  width: 100% !important;
}

.btn-sm {
  height: 32px !important;
  font-size: 12px !important;
  padding: 0 10px !important;
}

/* BUTTONS UNIFORMITY */
button, .btn-primary, .btn-secondary, .btn-fen-action, .header-btn, .scan-tool-btn {
  white-space: nowrap !important;
  box-sizing: border-box !important;
}


/* Mobile Responsiveness Improvements */
@media (max-width: 768px) {
  .app-header {
    padding: 8px 12px !important;
  }
  .header-inner {
    flex-wrap: wrap !important;
    gap: 8px !important;
    justify-content: space-between !important;
  }
  .brand {
    order: 1 !important;
  }
  .brand-title {
    font-size: 16px !important;
  }
  .brand-subtitle {
    display: none !important;
  }
  .header-actions {
    order: 2 !important;
    gap: 6px !important;
  }
  .nav-tabs {
    order: 3 !important;
    width: 100% !important;
    overflow-x: auto !important;
    white-space: nowrap !important;
    padding: 3px !important;
    justify-content: flex-start !important;
    -webkit-overflow-scrolling: touch !important;
  }
  .nav-tab {
    padding: 5px 10px !important;
    font-size: 11px !important;
  }
  .quota-badge-btn {
    padding: 4px 8px !important;
    font-size: 11px !important;
    height: 32px !important;
  }
  .header-icon-btn {
    width: 30px !important;
    height: 30px !important;
    min-width: 30px !important;
  }
  .status-pill {
    display: none !important;
  }
  .hero-card {
    padding: 20px 16px !important;
    gap: 14px !important;
  }
  .hero-title {
    font-size: 20px !important;
  }
  .hero-subtitle {
    font-size: 12.5px !important;
  }
  .dropzone {
    padding: 18px 12px !important;
  }
  .hero-convert-btn {
    white-space: normal !important;
    height: auto !important;
    min-height: 44px !important;
    padding: 10px 14px !important;
    font-size: 13px !important;
  }
  .hero-convert-btn,
  .hero-convert-btn span,
  .hero-convert-btn .btn-primary-text {
    white-space: normal !important;
    text-align: center !important;
    line-height: 1.3 !important;
  }
  .hero-convert-btn .btn-primary-kbd {
    display: none !important;
  }
  .workspace-strip {
    flex-wrap: wrap !important;
    justify-content: center !important;
    gap: 8px !important;
    padding: 6px 8px !important;
  }
  .workspace-strip-left, .workspace-strip-center, .workspace-strip-right {
    justify-content: center !important;
    flex-wrap: wrap !important;
    gap: 6px !important;
  }
  .workspace-strip .page-select-bar {
    flex-wrap: wrap !important;
    justify-content: center !important;
    width: 100% !important;
    gap: 6px !important;
  }
  .page-select-inner {
    flex-wrap: wrap !important;
    justify-content: center !important;
    gap: 6px !important;
  }
  .page-reprocess-btn {
    white-space: nowrap !important;
    font-size: 11px !important;
    padding: 4px 8px !important;
  }
  .strip-file-name {
    max-width: 130px !important;
  }
  .turn-pill {
    font-size: 11px !important;
    padding: 4px 10px !important;
  }
  .secondary-tab-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
  }
  .secondary-tab-header button {
    margin-left: 0 !important;
    width: 100% !important;
    white-space: normal !important;
    text-align: center !important;
    justify-content: center !important;
  }
  .secondary-tab-hero {
    padding: 16px 14px !important;
  }
}

/* CONVERSION MODE SWITCHER TABS */
.conversion-mode-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  width: 100%;
}

.mode-tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-card, rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius-md, 10px);
  padding: 10px 14px;
  color: var(--text-secondary, #94a3b8);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.mode-tab-btn.active {
  background: rgba(43, 114, 226, 0.2);
  border-color: var(--accent-blue, #3b82f6);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.3);
}

.mode-tab-desc {
  font-size: 11px;
  opacity: 0.75;
}

/* BATCH RANGE CONVERSION PANEL */
.batch-convert-panel {
  background: var(--bg-card, #111827);
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius-lg, 16px);
  padding: 18px 20px;
  margin-top: 10px;
  margin-bottom: 6px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.batch-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.batch-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.batch-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary, #fff);
}

.batch-badge-pill {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #000;
  font-size: 10px;
  font-weight: 900;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.05em;
}

.batch-header-hint {
  font-size: 12px;
  color: var(--text-secondary, #94a3b8);
}

.batch-controls-row {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.batch-input-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.batch-input-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted, #64748b);
  text-transform: uppercase;
}

.batch-num-input {
  width: 72px;
  height: 38px;
  background: var(--bg-input, #1e293b);
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.15));
  border-radius: var(--radius-sm, 8px);
  color: #fff;
  padding: 0 8px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.batch-text-input {
  width: 140px;
  height: 38px;
  background: var(--bg-input, #1e293b);
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.15));
  border-radius: var(--radius-sm, 8px);
  color: #38bdf8;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono, monospace);
}

.batch-run-btn {
  height: 38px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border: none;
  border-radius: var(--radius-sm, 8px);
  color: #fff;
  cursor: pointer;
  transition: all 0.2s;
}

.batch-run-btn:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
}

.batch-progress-card {
  background: var(--bg-input, #1e293b);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md, 12px);
  padding: 12px 14px;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.batch-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
}

.batch-progress-status {
  color: var(--text-primary, #fff);
  font-weight: 600;
}

.batch-progress-pct {
  color: var(--accent-blue, #38bdf8);
  font-weight: 800;
  font-family: var(--font-mono, monospace);
}

.batch-progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.batch-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.batch-downloads-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.batch-dl-btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
  transition: all 0.2s;
}

.batch-dl-btn:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: #10b981;
}


/* ==================================================================== */
/* MODULE 1 & 2: EVAL BAR, STOCKFISH TOGGLE, CATALOG 2400 & VIRAL GALLERY */
/* ==================================================================== */

/* --- Eval Bar Styles --- */
.eval-bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 28px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: 4px;
  box-sizing: border-box;
  position: relative;
  transition: all 0.25s ease;
}

.eval-bar-track {
  width: 100%;
  flex: 1;
  background: #0f172a;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column-reverse; /* Fill from bottom for White */
}

.eval-bar-fill {
  width: 100%;
  background: linear-gradient(to top, #ffffff, #e2e8f0);
  transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 0 0 4px 4px;
}

.eval-score-pill {
  font-size: 10px;
  font-weight: 800;
  color: #38bdf8;
  margin-top: 4px;
  text-align: center;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* --- Stockfish Browser Analysis Bar Panel --- */
.stockfish-bar-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  background: rgba(30, 41, 59, 0.65);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 10px;
  padding: 8px 14px;
  margin-top: 10px;
  backdrop-filter: blur(8px);
}

.stockfish-toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.stockfish-checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.stockfish-toggle-switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 20px;
  background: #334155;
  border-radius: 20px;
  transition: background 0.2s;
}

.stockfish-toggle-switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform 0.2s;
}

.stockfish-checkbox:checked + .stockfish-toggle-switch {
  background: #0284c7;
}

.stockfish-checkbox:checked + .stockfish-toggle-switch::after {
  transform: translateX(18px);
}

.stockfish-toggle-text {
  font-size: 13px;
  font-weight: 700;
  color: #f1f5f9;
}

.stockfish-bestmove-display {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: #94a3b8;
}

.bestmove-label {
  color: #94a3b8;
}

.bestmove-val {
  color: #4ade80;
  font-size: 13px;
  font-family: monospace;
}

.stockfish-depth-badge {
  background: #0f172a;
  color: #38bdf8;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* --- Coach Quick Preset Card --- */
.coach-preset-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.85), rgba(15, 23, 42, 0.95));
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.preset-header {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.preset-title-block {
  display: flex;
  align-items: center;
  gap: 12px;
}

.preset-icon {
  font-size: 26px;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 10px;
  padding: 6px 10px;
}

.preset-title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: #f8fafc;
}

.preset-subtitle {
  margin: 4px 0 0 0;
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.4;
}

.preset-controls-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.preset-select {
  background: #0f172a;
  border: 1px solid #334155;
  color: #f8fafc;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  flex: 1;
  min-width: 200px;
}

.preset-action-btn {
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 800;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  white-space: nowrap;
}

.preset-link-feedback {
  margin-top: 16px;
  padding: 14px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.preset-link-info {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #10b981;
  font-weight: 700;
  font-size: 14px;
}

.preset-share-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.share-btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  transition: opacity 0.2s;
}

.share-btn:hover {
  opacity: 0.9;
}

.share-whatsapp {
  background: #25d366;
  color: #000;
}

.share-telegram {
  background: #229ed9;
}

.preset-url-input {
  flex: 1;
  min-width: 220px;
  padding: 8px 12px;
  font-size: 12px;
  font-family: monospace;
}

/* --- Catalog 2400 Section --- */
.catalog-section {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 24px;
}

.catalog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 16px;
}

.catalog-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.catalog-icon {
  font-size: 24px;
}

.catalog-title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: #f8fafc;
}

.catalog-count-pill {
  font-size: 12px;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  padding: 2px 8px;
  border-radius: 6px;
  margin-top: 2px;
  display: inline-block;
}

.catalog-search-wrap {
  flex: 1;
  max-width: 360px;
}

.catalog-search-input {
  width: 100%;
  background: #0f172a;
  border: 1px solid #334155;
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  box-sizing: border-box;
}

.catalog-search-input:focus {
  border-color: #38bdf8;
}

.catalog-books-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.catalog-book-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  color: #cbd5e1;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.catalog-book-tab:hover {
  background: #334155;
  color: #fff;
}

.catalog-book-tab.active {
  background: #0284c7;
  color: #fff;
  border-color: #38bdf8;
}

.book-tab-count {
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: 10px;
  font-size: 11px;
}

.catalog-subfilters-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-label {
  font-size: 12px;
  color: #94a3b8;
  font-weight: 600;
}

.filter-select {
  background: #0f172a;
  border: 1px solid #334155;
  color: #f8fafc;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

.catalog-items-found {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: #94a3b8;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.catalog-puzzle-card {
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.15s, border-color 0.15s;
}

.catalog-puzzle-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.4);
}

.puzzle-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.puzzle-book-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
}

.puzzle-diff-stars {
  color: #f59e0b;
  font-size: 12px;
}

.puzzle-title-row {
  font-size: 13px;
  font-weight: 700;
  color: #f8fafc;
}

.puzzle-turn-pill {
  font-size: 11px;
  font-weight: 600;
  color: #94a3b8;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.puzzle-theme-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.puzzle-theme-tag {
  background: #1e293b;
  color: #cbd5e1;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
}

.puzzle-first-move-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-family: monospace;
  color: #4ade80;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.puzzle-card-actions {
  display: flex;
  gap: 6px;
  margin-top: auto;
}

.puzzle-action-btn {
  flex: 1;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.puzzle-action-btn-primary {
  background: #0284c7;
  color: #fff;
}

.puzzle-action-btn-primary:hover {
  background: #0369a1;
}

.puzzle-action-btn-secondary {
  background: #1e293b;
  color: #cbd5e1;
}

.puzzle-action-btn-secondary:hover {
  background: #334155;
  color: #fff;
}

.catalog-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.catalog-page-indicator {
  font-size: 13px;
  font-weight: 700;
  color: #cbd5e1;
}

/* --- Viral 60 FPS Showcase Section (Tab 3) --- */
.viral-showcase-section {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 20px;
}

.viral-showcase-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.viral-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.viral-icon {
  font-size: 26px;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 10px;
  padding: 6px 10px;
}

.viral-title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: #f8fafc;
}

.viral-subtitle {
  margin: 4px 0 0 0;
  font-size: 13px;
  color: #94a3b8;
}

.viral-lang-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.viral-tab-lang {
  font-size: 12px;
  padding: 6px 14px;
}

.viral-tab-lang.active {
  background: #0284c7;
  color: #fff;
  border-color: #38bdf8;
}

.viral-badge-counter {
  font-size: 12px;
  font-weight: 700;
  color: #38bdf8;
  margin-left: 8px;
}

.viral-grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.viral-card {
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s, border-color 0.15s;
}

.viral-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.4);
}

.viral-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viral-fps-badge {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  padding: 3px 8px;
  border-radius: 8px;
  letter-spacing: 0.04em;
}

.viral-size-badge {
  font-size: 11px;
  font-weight: 700;
  color: #94a3b8;
}

.viral-video-player {
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 380px;
  border-radius: 8px;
  background: #000;
  object-fit: contain;
}

.viral-card-title {
  font-size: 13px;
  font-weight: 700;
  color: #f8fafc;
  line-height: 1.35;
}

.viral-card-desc-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 8px;
  font-size: 11px;
  color: #cbd5e1;
  max-height: 70px;
  overflow-y: auto;
  line-height: 1.4;
  white-space: pre-line;
}

.viral-card-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: auto;
}

.viral-copy-desc-btn {
  flex: 1;
  background: #1e293b;
  border: 1px solid #334155;
  color: #f8fafc;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.viral-copy-desc-btn:hover {
  background: #334155;
  border-color: #38bdf8;
}

.viral-download-btn {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
}

.viral-download-btn:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: #10b981;
}

/* ==========================================================================
   iLovePDF ULTRA-MINIMALIST 3-STEP FUNNEL
   ========================================================================== */

.hidden-feature {
  display: none !important;
}

.ilovepdf-container {
  max-width: 960px;
  width: 100%;
  margin: 30px auto 60px;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ilovepdf-step {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: emilStepFadeIn 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes emilStepFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Step 1: Hero Selection */
.ilovepdf-hero {
  text-align: center;
  max-width: 760px;
  margin: 20px auto;
  width: 100%;
}

.ilovepdf-hero-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
  line-height: 1.15;
  margin-bottom: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ilovepdf-hero-subtitle {
  font-size: 17px;
  line-height: 1.5;
  color: #94a3b8;
  margin-bottom: 34px;
  font-weight: 400;
}

.ilovepdf-dropzone-large {
  position: relative;
  background: #111827;
  border: 2px dashed rgba(59, 130, 246, 0.4);
  border-radius: 24px;
  padding: 56px 40px;
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
  cursor: pointer;
  text-align: center;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.ilovepdf-dropzone-large:hover,
.ilovepdf-dropzone-large.dragover {
  border-color: #3b82f6;
  background: #172033;
  transform: translateY(-2px);
  box-shadow: 0 25px 50px -12px rgba(59, 130, 246, 0.25);
}

.ilovepdf-btn-cta {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: 16px;
  padding: 18px 36px;
  font-size: 20px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-btn-cta:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: scale(1.02);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.5);
}

.ilovepdf-btn-cta:active {
  transform: scale(0.98);
}

.ilovepdf-drop-subtext {
  font-size: 14px;
  color: #64748b;
  font-weight: 500;
}

/* Step 2: Configure */
.ilovepdf-card {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 36px;
  width: 100%;
  max-width: 640px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.ilovepdf-file-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 16px 20px;
  gap: 16px;
}

.ilovepdf-file-left {
  display: flex;
  align-items: center;
  gap: 14px;
  overflow: hidden;
  min-width: 0;
  flex: 1;
}

.ilovepdf-file-left > div {
  min-width: 0;
  flex: 1;
}

.ilovepdf-file-badge {
  background: #ef4444;
  color: #ffffff;
  font-size: 12px;
  font-weight: 900;
  padding: 6px 10px;
  border-radius: 8px;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.ilovepdf-file-title {
  font-weight: 700;
  font-size: 15px;
  color: #f8fafc;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ilovepdf-file-desc {
  font-size: 12px;
  color: #94a3b8;
  margin-top: 2px;
}

.ilovepdf-btn-remove {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 13px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
  transition: all 150ms;
  flex-shrink: 0;
}

.ilovepdf-btn-remove:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.ilovepdf-options-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ilovepdf-choice-card {
  background: #182234;
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  cursor: pointer;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-choice-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  background: #1c273c;
}

.ilovepdf-choice-card.active {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.08);
}

.ilovepdf-radio-circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid #64748b;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 150ms;
}

.ilovepdf-choice-card.active .ilovepdf-radio-circle {
  border-color: #3b82f6;
}

.ilovepdf-choice-card.active .ilovepdf-radio-circle::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #3b82f6;
}

.ilovepdf-choice-content {
  flex: 1;
}

.ilovepdf-choice-title {
  font-size: 15px;
  font-weight: 700;
  color: #f8fafc;
}

.ilovepdf-choice-desc {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 3px;
}

.ilovepdf-range-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 14px;
  color: #cbd5e1;
}

.ilovepdf-page-box {
  width: 70px;
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: #ffffff;
  padding: 6px 10px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.ilovepdf-btn-convert {
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 16px;
  padding: 16px 24px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.35);
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
  width: 100%;
}

.ilovepdf-btn-convert:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

.ilovepdf-btn-convert:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Step 2 Progress */
.ilovepdf-progress-box {
  background: #182234;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ilovepdf-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
}

.ilovepdf-progress-msg {
  color: #f8fafc;
}

.ilovepdf-progress-pct {
  color: #38bdf8;
  font-weight: 800;
}

.ilovepdf-progress-track {
  background: #0f172a;
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.ilovepdf-progress-bar {
  background: linear-gradient(90deg, #3b82f6, #10b981);
  height: 100%;
  border-radius: 999px;
  transition: width 300ms ease;
}

/* Step 3: Success Result */
.ilovepdf-success-card {
  text-align: center;
  padding: 44px 36px;
}

.ilovepdf-success-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.ilovepdf-success-title {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.ilovepdf-success-desc {
  font-size: 15px;
  color: #94a3b8;
  margin-bottom: 28px;
}

.ilovepdf-download-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  width: 100%;
}

.ilovepdf-dl-main-btn {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  text-decoration: none;
  font-size: 20px;
  font-weight: 800;
  padding: 18px 36px;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  max-width: 440px;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-dl-main-btn:hover {
  background: linear-gradient(135deg, #34d399, #10b981);
  transform: scale(1.02);
  box-shadow: 0 14px 30px rgba(16, 185, 129, 0.45);
}

.ilovepdf-dl-sub-btn {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #38bdf8;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 150ms;
}

.ilovepdf-dl-sub-btn:hover {
  background: #334155;
  color: #ffffff;
}

.ilovepdf-btn-restart {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #94a3b8;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 16px;
  transition: all 150ms;
}

.ilovepdf-btn-restart:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

/* Spoiler for side-by-side verification */
.ilovepdf-spoiler-container {
  width: 100%;
  margin-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}

.ilovepdf-spoiler-btn {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #cbd5e1;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 200ms cubic-bezier(0.16, 1, 0.3, 1);
  margin: 0 auto;
  max-width: 100%;
  box-sizing: border-box;
}

.ilovepdf-spoiler-btn span {
  white-space: normal;
  line-height: 1.35;
}

.ilovepdf-spoiler-btn:hover {
  background: #273549;
  border-color: #38bdf8;
  color: #ffffff;
}

.ilovepdf-spoiler-arrow {
  transition: transform 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-spoiler-btn.open .ilovepdf-spoiler-arrow {
  transform: rotate(180deg);
}

.ilovepdf-container.spoiler-open,
.ilovepdf-container:has(#step3SpoilerBtn.open) {
  max-width: 1360px !important;
  transition: max-width 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-card.spoiler-open,
.ilovepdf-card:has(#step3SpoilerBtn.open) {
  max-width: 1320px !important;
  transition: max-width 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-spoiler-drawer {
  width: 100%;
  margin-top: 20px;
  animation: emilSpoilerIn 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ilovepdf-spoiler-drawer .workspace-section {
  width: 100%;
  margin: 0;
  padding: 0;
}

/* Mobile responsive */
@media (max-width: 640px) {
  .ilovepdf-hero-title {
    font-size: 26px;
  }
  .ilovepdf-hero-subtitle {
    font-size: 14px;
  }
  .ilovepdf-dropzone-large {
    padding: 32px 16px;
  }
  .ilovepdf-btn-cta {
    font-size: 16px;
    padding: 14px 20px;
  }
  .ilovepdf-card {
    padding: 20px 14px;
  }
  .ilovepdf-file-card {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 14px;
  }
  .ilovepdf-file-left {
    width: 100%;
    min-width: 0;
  }
  .ilovepdf-file-left > div {
    min-width: 0;
    flex: 1;
  }
  .ilovepdf-file-title {
    font-size: 14px;
  }
  .ilovepdf-file-desc {
    font-size: 11px;
  }
  .ilovepdf-btn-remove {
    align-self: flex-end;
    font-size: 12px;
    padding: 4px 8px;
    margin-top: -6px;
  }
  .ilovepdf-dl-main-btn {
    font-size: 16px;
    padding: 14px 18px;
  }
  .ilovepdf-spoiler-btn {
    font-size: 13px;
    padding: 10px 14px;
    width: 100%;
    max-width: 100%;
    display: flex;
    box-sizing: border-box;
    justify-content: center;
    white-space: normal;
    text-align: center;
    line-height: 1.4;
  }
  .header-inner {
    flex-wrap: nowrap !important;
    gap: 8px !important;
    justify-content: space-between !important;
  }
  .brand {
    min-width: 0 !important;
    flex-shrink: 1 !important;
  }
  .brand-title {
    font-size: 13px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  .brand-subtitle,
  .brand-sub-title {
    display: none !important;
  }
  .header-actions {
    gap: 6px !important;
    flex-shrink: 0 !important;
  }
  #userQuotaBadgeBtn {
    padding: 6px 10px !important;
    font-size: 11px !important;
    white-space: nowrap !important;
  }
}