/* ═══════════════════════════════════════════════════════════════════════════
   PhotoSplit Studio — style.css
   Full design system with dark mode, glassmorphism, animations, responsive
═══════════════════════════════════════════════════════════════════════════ */

/* ── Google Fonts ─────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ── CSS Custom Properties (Design Tokens) ───────────────────────────────── */
:root {
  /* Colors — Light Mode */
  --bg-base:         #f0f2f8;
  --bg-surface:      #ffffff;
  --bg-surface-2:    #f7f8fc;
  --bg-glass:        rgba(255,255,255,0.72);
  --bg-glass-border: rgba(255,255,255,0.9);
  --border:          rgba(99,102,241,0.15);
  --border-strong:   rgba(99,102,241,0.30);

  --accent:          #6366f1;
  --accent-2:        #8b5cf6;
  --accent-grad:     linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --accent-glow:     rgba(99,102,241,0.25);

  --success:         #10b981;
  --warning:         #f59e0b;
  --danger:          #ef4444;
  --info:            #3b82f6;

  --text-primary:    #1e1b4b;
  --text-secondary:  #6b7280;
  --text-muted:      #9ca3af;
  --text-on-accent:  #ffffff;

  /* Sizing */
  --sidebar-w:       300px;
  --header-h:        60px;
  --ad-top-h:        90px;
  --radius-sm:       6px;
  --radius-md:       12px;
  --radius-lg:       20px;
  --radius-xl:       28px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 16px rgba(99,102,241,0.12), 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg:  0 12px 40px rgba(99,102,241,0.18), 0 4px 16px rgba(0,0,0,0.10);
  --shadow-glass: 0 8px 32px rgba(31,38,135,0.12);

  /* Motion */
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
  --ease-smooth: cubic-bezier(0.4,0,0.2,1);
  --dur-fast:    120ms;
  --dur-normal:  220ms;
  --dur-slow:    380ms;
}

/* Dark Mode Tokens */
[data-theme="dark"] {
  --bg-base:         #0f0e17;
  --bg-surface:      #1a1825;
  --bg-surface-2:    #211e30;
  --bg-glass:        rgba(26,24,37,0.82);
  --bg-glass-border: rgba(99,102,241,0.20);
  --border:          rgba(99,102,241,0.18);
  --border-strong:   rgba(99,102,241,0.40);

  --text-primary:    #e8e6f0;
  --text-secondary:  #a09eb8;
  --text-muted:      #6b6988;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.40);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.40), 0 0 0 1px rgba(99,102,241,0.10);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.50), 0 0 0 1px rgba(99,102,241,0.15);
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.40);
}

/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 15px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--dur-slow) var(--ease-smooth),
              color var(--dur-slow) var(--ease-smooth);
}

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 99px; }

/* ── Layout Shell ─────────────────────────────────────────────────────────── */
#app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Ad — Top Leaderboard ─────────────────────────────────────────────────── */
#ad-leaderboard {
  width: 100%;
  min-height: var(--ad-top-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
#site-header {
  height: var(--header-h);
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-grad);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 0 16px var(--accent-glow);
}

.header-spacer { flex: 1; }

/* Privacy Badge */
.privacy-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(16,185,129,0.10);
  border: 1px solid rgba(16,185,129,0.30);
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--success);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.privacy-badge svg { flex-shrink: 0; }

/* Dark Mode Toggle */
.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dur-fast) var(--ease-smooth);
  flex-shrink: 0;
}
.icon-btn:hover {
  background: var(--bg-surface-2);
  border-color: var(--border-strong);
  color: var(--accent);
  transform: scale(1.05);
}
.icon-btn:active { transform: scale(0.95); }

/* ── Main Body ────────────────────────────────────────────────────────────── */
#main-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--dur-normal) var(--ease-smooth);
  z-index: 10;
}

.sidebar-section {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-section:last-child { border-bottom: none; }

.section-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* ── Upload Zone ──────────────────────────────────────────────────────────── */
#upload-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--dur-normal) var(--ease-smooth);
  background: var(--bg-surface-2);
  position: relative;
  overflow: hidden;
}

#upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-grad);
  opacity: 0;
  transition: opacity var(--dur-normal) var(--ease-smooth);
}

#upload-zone:hover,
#upload-zone.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

#upload-zone.drag-over::before { opacity: 0.05; }

#upload-zone .upload-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
  display: block;
  position: relative;
  transition: transform var(--dur-normal) var(--ease-spring);
}
#upload-zone:hover .upload-icon,
#upload-zone.drag-over .upload-icon { transform: translateY(-4px) scale(1.15); }

#upload-zone .upload-text {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

#upload-zone .upload-text strong {
  color: var(--accent);
  font-weight: 700;
}

#upload-zone .upload-formats {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 6px;
  position: relative;
}

#file-input { display: none; }

/* ── File List ────────────────────────────────────────────────────────────── */
#file-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 180px;
  overflow-y: auto;
}

.file-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-smooth);
  animation: slideIn var(--dur-normal) var(--ease-spring);
}

.file-chip:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.file-chip.active { border-color: var(--accent); background: rgba(99,102,241,0.07); }

.file-chip-icon { font-size: 1rem; flex-shrink: 0; }
.file-chip-name {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.file-chip-remove {
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all var(--dur-fast);
  border: none;
  background: none;
  flex-shrink: 0;
}
.file-chip-remove:hover { color: var(--danger); background: rgba(239,68,68,0.10); }

/* ── Output Settings ──────────────────────────────────────────────────────── */
.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8rem;
  transition: border-color var(--dur-fast);
  outline: none;
  margin-bottom: 10px;
}

.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

select.form-control { cursor: pointer; }

.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
  height: 4px;
}

.range-val {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  min-width: 28px;
  text-align: right;
}

/* Toggle switch */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.toggle-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.toggle {
  position: relative;
  width: 38px;
  height: 21px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border-strong);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 15px;
  height: 15px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--dur-normal) var(--ease-spring);
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(17px); }

/* ── Detection Settings ───────────────────────────────────────────────────── */
.threshold-section .form-label { display: block; margin-bottom: 4px; }

/* ── Ad — Sidebar Rectangle ──────────────────────────────────────────────── */
#ad-sidebar {
  margin: 16px;
  min-height: 250px;
  background: var(--bg-surface-2);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  flex-shrink: 0;
}

/* ── Main Canvas Area ─────────────────────────────────────────────────────── */
#canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-base);
}

/* Toolbar */
#canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  min-height: 52px;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.toolbar-sep {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 4px;
}

.toolbar-spacer { flex: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur-fast) var(--ease-smooth);
  white-space: nowrap;
  outline: none;
}

.btn:active { transform: scale(0.96); }

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover { opacity: 0.9; box-shadow: 0 4px 16px var(--accent-glow); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-surface-2);
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger {
  background: rgba(239,68,68,0.10);
  border-color: rgba(239,68,68,0.30);
  color: var(--danger);
}
.btn-danger:hover { background: rgba(239,68,68,0.20); }

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 2px 8px rgba(16,185,129,0.30);
}
.btn-success:hover { opacity: 0.9; transform: translateY(-1px); }

.btn:disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

/* Canvas zone icons */
.btn .btn-icon { font-size: 1em; }

/* ── Canvas Wrapper & Scroll ──────────────────────────────────────────────── */
#canvas-scroll {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  position: relative;
}

#canvas-wrapper {
  position: relative;
  display: inline-block;
  line-height: 0;
  border-radius: var(--radius-md);
  overflow: visible;
  box-shadow: var(--shadow-lg);
  cursor: crosshair;
}

#main-canvas {
  display: block;
  max-width: none;
  border-radius: var(--radius-md);
}

/* Empty state */
#empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-muted);
  padding: 48px;
  text-align: center;
}
#empty-state .empty-icon { font-size: 4rem; opacity: 0.4; }
#empty-state h2 { font-size: 1.2rem; color: var(--text-secondary); font-weight: 600; }
#empty-state p  { font-size: 0.85rem; max-width: 300px; line-height: 1.6; }

/* ── Progress Bar ─────────────────────────────────────────────────────────── */
#progress-container {
  padding: 8px 16px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  display: none;
}
#progress-container.active { display: block; }

#progress-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 4px;
}

#progress-bar-fill {
  height: 100%;
  background: var(--accent-grad);
  border-radius: 99px;
  transition: width 200ms var(--ease-smooth);
  width: 0%;
}

#progress-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Splits Strip ─────────────────────────────────────────────────────────── */
#splits-panel {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  display: none;
  flex-direction: column;
}

#splits-panel.visible { display: flex; }

#splits-header {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#splits-header h3 { font-size: 0.82rem; font-weight: 700; flex: 1; }
#splits-count {
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
}

#splits-strip {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  overflow-x: auto;
  overflow-y: hidden;
  min-height: 110px;
  max-height: 130px;
  align-items: center;
}

.split-thumb {
  position: relative;
  flex-shrink: 0;
  cursor: pointer;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border);
  transition: all var(--dur-fast) var(--ease-smooth);
  animation: slideIn var(--dur-normal) var(--ease-spring);
}
.split-thumb:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.split-thumb.selected { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.split-thumb canvas { display: block; height: 80px; width: auto; }

.split-thumb-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.65));
  padding: 6px 5px 4px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.split-thumb-num {
  font-size: 0.62rem;
  font-weight: 700;
  color: #fff;
}

.split-thumb-actions {
  display: flex;
  gap: 3px;
  opacity: 0;
  transition: opacity var(--dur-fast);
}
.split-thumb:hover .split-thumb-actions { opacity: 1; }

.split-action-btn {
  width: 20px;
  height: 20px;
  border: none;
  background: rgba(255,255,255,0.20);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #fff;
  transition: background var(--dur-fast);
  backdrop-filter: blur(4px);
}
.split-action-btn:hover { background: rgba(255,255,255,0.40); }

/* Rotation indicator */
.split-rotation-badge {
  position: absolute;
  top: 3px; right: 3px;
  background: rgba(99,102,241,0.85);
  color: #fff;
  font-size: 0.55rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  display: none;
}
.split-rotation-badge.visible { display: block; }

/* ── Bounding Box Overlays ────────────────────────────────────────────────── */
#overlay-svg {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.bbox-rect {
  pointer-events: all;
  fill: rgba(99,102,241,0.06);
  stroke: var(--accent);
  stroke-width: 2;
  rx: 3;
  cursor: move;
  transition: fill var(--dur-fast);
  vector-effect: non-scaling-stroke;
}
.bbox-rect:hover { fill: rgba(99,102,241,0.12); }
.bbox-rect.selected { stroke: #a855f7; stroke-width: 2.5; fill: rgba(168,85,247,0.09); }
.bbox-rect.crop-mode { stroke: var(--warning); fill: rgba(245,158,11,0.08); }

.bbox-handle {
  pointer-events: all;
  fill: var(--accent);
  stroke: #fff;
  stroke-width: 1.5;
  cursor: nwse-resize;
  transition: r var(--dur-fast);
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.30));
}
.bbox-handle:hover, .bbox-handle:active { r: 6; fill: #a855f7; }

.bbox-label {
  pointer-events: none;
  fill: var(--accent);
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
  paint-order: stroke;
  stroke: var(--bg-surface);
  stroke-width: 3px;
  stroke-linejoin: round;
}

/* Draw cursor */
#canvas-wrapper.drawing { cursor: crosshair; }
#canvas-wrapper.moving  { cursor: move; }

/* ── Modal / Preview ─────────────────────────────────────────────────────── */
#modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-smooth);
}
#modal-backdrop.open { opacity: 1; pointer-events: all; }

#modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 24px;
  max-width: min(90vw, 900px);
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform var(--dur-normal) var(--ease-spring);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
#modal-backdrop.open #modal-box { transform: scale(1) translateY(0); }

#modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
#modal-title { font-size: 1rem; font-weight: 700; flex: 1; }

#modal-img-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 200px;
}
#modal-preview-img {
  max-width: 100%;
  max-height: 65vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

#modal-actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

/* ── Toast Notifications ──────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastIn var(--dur-normal) var(--ease-spring) forwards;
  pointer-events: all;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(12px);
  max-width: 320px;
}

.toast-success { background: rgba(16,185,129,0.95); color: #fff; }
.toast-error   { background: rgba(239, 68, 68,0.95); color: #fff; }
.toast-info    { background: rgba(99,102,241,0.95); color: #fff; }
.toast-warning { background: rgba(245,158,11,0.95); color: #fff; }

.toast.removing { animation: toastOut var(--dur-normal) var(--ease-smooth) forwards; }

/* ── Keyboard Shortcut Hint ───────────────────────────────────────────────── */
#kbd-hint {
  padding: 8px 16px;
  background: var(--bg-surface-2);
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
kbd {
  display: inline-block;
  padding: 1px 5px;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  font-family: inherit;
  font-size: 0.65rem;
  color: var(--text-secondary);
  box-shadow: 0 1px 0 var(--border-strong);
}

/* ── Zoom Controls ────────────────────────────────────────────────────────── */
#zoom-controls {
  position: fixed;
  bottom: 24px;
  left: calc(var(--sidebar-w) + 24px);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-strong);
  border-radius: 99px;
  padding: 5px 10px;
  box-shadow: var(--shadow-md);
  display: none;
}
#zoom-controls.visible { display: flex; }
#zoom-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 44px;
  text-align: center;
}

/* ── Sensitivity Controls ─────────────────────────────────────────────────── */
.detect-settings {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ── Animations ───────────────────────────────────────────────────────────── */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

.spinning { animation: spin 0.8s linear infinite; }

/* Detect button pulse while processing */
.processing-pulse { animation: pulse-glow 1.5s ease-in-out infinite; }

/* ── Draw-crop overlay ────────────────────────────────────────────────────── */
#draw-overlay {
  position: absolute;
  inset: 0;
  display: none;
  cursor: crosshair;
}
#draw-overlay.active { display: block; }

#draw-preview-rect {
  position: absolute;
  border: 2px dashed var(--warning);
  background: rgba(245,158,11,0.10);
  border-radius: 2px;
  pointer-events: none;
  display: none;
}

/* ── Fullscreen Spinner ───────────────────────────────────────────────────── */
#global-spinner {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.50);
  backdrop-filter: blur(6px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
}
#global-spinner.active { display: flex; }
#global-spinner .spinner-ring {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── SEO Section & Footer ─────────────────────────────────────────────────── */
.seo-wrapper {
  background: var(--bg-surface-2);
  border-top: 1px solid var(--border);
  padding: 80px 20px;
}
.seo-container {
  max-width: 800px;
  margin: 0 auto;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}
.seo-container h1 { font-size: 2.2rem; color: var(--text-primary); margin-bottom: 24px; font-weight: 800; letter-spacing: -0.03em; }
.seo-container h2 { font-size: 1.5rem; color: var(--text-primary); margin: 40px 0 16px; font-weight: 700; }
.seo-container p { margin-bottom: 16px; }
.seo-container ol, .seo-container ul { margin: 0 0 24px 24px; }
.seo-container li { margin-bottom: 8px; }
.seo-container strong { color: var(--accent); font-weight: 600; }

.site-footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  padding: 40px 20px;
  text-align: center;
}
.footer-inner { max-width: 800px; margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.85rem; font-weight: 500; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { color: var(--border-strong); font-size: 0.75rem; }

/* ── Generic Text Modals ──────────────────────────────────────────────────── */
.text-modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.72); backdrop-filter: blur(8px);
  z-index: 400; display: none; align-items: center; justify-content: center;
}
.text-modal-backdrop.open { display: flex; animation: slideIn 0.2s; }
.text-modal-box {
  background: var(--bg-surface); border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl); padding: 32px; max-width: 600px; width: 90%;
  max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow-lg);
}
.text-modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.text-modal-header h2 { font-size: 1.4rem; font-weight: 700; }
.text-modal-content { font-size: 0.95rem; line-height: 1.6; color: var(--text-secondary); }
.text-modal-content p, .text-modal-content ul { margin-bottom: 16px; }
.text-modal-content ul { margin-left: 24px; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --sidebar-w: 260px; }
}

@media (max-width: 720px) {
  #main-body { flex-direction: column; }
  #sidebar {
    width: 100%;
    min-width: 0;
    max-height: 280px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  #ad-sidebar { display: none; }
  #zoom-controls { left: 16px; }
  .privacy-badge span { display: none; }
  #kbd-hint { display: none; }
}

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden  { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.gap-2   { gap: 8px; }

/* Selection highlight in strip */
.split-thumb.highlighted { border-color: var(--warning); }

/* Drop indicator */
.drop-active {
  outline: 3px dashed var(--accent);
  outline-offset: 4px;
}