/* ==========================================================
   GifCaption – Styles
   Dark creative-tool theme
   ========================================================== */

/* ── Variables ────────────────────────────── */
:root {
  --bg-base: #0c0c14;
  --bg-primary: #12121e;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #252540;
  --bg-elevated: #2d2d4a;
  --border: #3a3a5c;
  --border-light: #4a4a6a;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-dim: rgba(99, 102, 241, 0.15);
  --cyan: #22d3ee;
  --danger: #ef4444;
  --danger-hover: #f87171;
  --success: #10b981;
  --warning: #f59e0b;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.5);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── Buttons ──────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: background .15s, color .15s, box-shadow .15s;
  text-decoration: none; line-height: 1.4;
}
.btn svg { flex-shrink: 0; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-accent { background: var(--accent-dim); color: var(--accent-hover); border: 1px solid var(--accent); }
.btn-accent:hover { background: var(--accent); color: #fff; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-full { width: 100%; justify-content: center; }
.btn-small { padding: 5px 12px; font-size: 13px; }
.btn-xs { padding: 3px 10px; font-size: 12px; }

/* ── Forms ────────────────────────────────── */
label { display: block; margin-bottom: 4px; font-size: 13px; font-weight: 600; color: var(--text-secondary); }
textarea, select, input[type="text"] {
  width: 100%; padding: 8px 10px;
  background: var(--bg-primary); color: var(--text-primary);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 16px; font-family: inherit; resize: vertical;
}
textarea:focus, select:focus, input[type="text"]:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-dim);
}
select { cursor: pointer; }
input[type="color"] {
  width: 40px; height: 32px; padding: 2px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg-primary); cursor: pointer;
}
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--bg-tertiary); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid var(--bg-secondary);
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid var(--bg-secondary);
}
.form-group { margin-bottom: 12px; }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

.btn-group { display: flex; gap: 0; }
.btn-group .align-btn {
  flex: 1; padding: 6px 0; font-size: 12px; font-weight: 600;
  background: var(--bg-primary); color: var(--text-secondary);
  border: 1px solid var(--border); cursor: pointer; transition: all .15s;
}
.btn-group .align-btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.btn-group .align-btn:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.btn-group .align-btn:not(:first-child) { border-left: none; }
.btn-group .align-btn.active,
.btn-group .align-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Landing Page ─────────────────────────── */
.landing {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 2rem;
}
.landing-header { text-align: center; margin-bottom: 2.5rem; }
.landing-header h1 { font-size: 3rem; font-weight: 800; letter-spacing: -1px; }
.landing-header .tagline { font-size: 1.15rem; color: var(--text-secondary); margin-top: .5rem; }
.landing-header .sub { font-size: .9rem; color: var(--text-muted); margin-top: .4rem; }

.landing-upload {
  width: 100%; max-width: 520px;
  background: var(--bg-secondary); border: 2px dashed var(--border);
  border-radius: var(--radius-lg); padding: 3rem 2rem; text-align: center;
  cursor: pointer; transition: border-color .2s, background .2s;
}
.landing-upload:hover, .landing-upload.dragover {
  border-color: var(--accent); background: var(--accent-dim);
}
.landing-upload svg { color: var(--text-muted); margin-bottom: 1rem; }
.landing-upload h2 { font-size: 1.3rem; margin-bottom: .5rem; }
.landing-upload p { color: var(--text-secondary); font-size: .95rem; }

.landing-features {
  max-width: 520px; width: 100%; margin-top: 2.5rem;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
.feature-card {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 1rem 1.2rem;
}
.feature-card h3 { font-size: .85rem; color: var(--accent-hover); margin-bottom: .3rem; }
.feature-card p { font-size: .8rem; color: var(--text-muted); line-height: 1.4; }

.landing-footer {
  margin-top: 2rem; font-size: .8rem; color: var(--text-muted); text-align: center;
}
.landing-footer kbd {
  display: inline-block; padding: 1px 6px; background: var(--bg-tertiary);
  border: 1px solid var(--border); border-radius: 3px; font-size: .75rem;
}

/* ── Editor Layout ────────────────────────── */
.editor-body { overflow: hidden; }

.editor-app {
  display: flex; flex-direction: column;
  height: 100vh; height: 100dvh; /* dvh fallback for mobile address bar */
  overflow: hidden;
}

.editor-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; height: 48px; min-height: 48px;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
.logo {
  font-size: 18px; font-weight: 800; color: var(--text-primary);
  text-decoration: none; letter-spacing: -.5px;
}
.logo:hover { text-decoration: none; color: var(--text-primary); }
.logo-accent { color: var(--accent); }
.header-actions { display: flex; gap: 8px; }

/* Upload zone */
.upload-zone {
  flex: 1; display: flex; align-items: center; justify-content: center; padding: 2rem;
}
.drop-zone {
  width: 100%; max-width: 500px;
  background: var(--bg-secondary); border: 2px dashed var(--border);
  border-radius: var(--radius-lg); padding: 3rem 2rem; text-align: center;
  cursor: pointer; transition: border-color .2s, background .2s;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent); background: var(--accent-dim);
}
.drop-icon { color: var(--text-muted); margin-bottom: 1rem; }
.drop-zone h2 { font-size: 1.25rem; margin-bottom: .4rem; }
.drop-zone p { color: var(--text-secondary); }
.drop-hint { font-size: .8rem; color: var(--text-muted); margin-top: .5rem; }

/* Editor workspace */
.editor-workspace { display: flex; flex-direction: column; flex: 1; overflow: hidden; }

.editor-main {
  display: flex; flex: 1; overflow: hidden;
}

/* Preview panel */
.editor-preview {
  flex: 1; display: flex; flex-direction: column;
  background: var(--bg-base);
  min-width: 0;
}
.canvas-container {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 12px; overflow: hidden;
  background:
    linear-gradient(45deg, #151520 25%, transparent 25%),
    linear-gradient(-45deg, #151520 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #151520 75%),
    linear-gradient(-45deg, transparent 75%, #151520 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-color: #0e0e1a;
}
#preview-canvas {
  max-width: 100%; max-height: 100%;
  display: block; border-radius: 2px;
  box-shadow: var(--shadow-lg);
  touch-action: none;  /* prevent scroll/zoom while dragging captions */
}

/* Playback controls */
.playback-controls {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary); border-top: 1px solid var(--border);
}
.ctrl-btn {
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
  background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary); cursor: pointer;
  transition: background .15s;
}
.ctrl-btn:hover { background: var(--bg-elevated); }
.ctrl-btn svg { pointer-events: none; }
.ctrl-btn-play { width: 40px; height: 40px; background: var(--accent); border-color: var(--accent); }
.ctrl-btn-play:hover { background: var(--accent-hover); }

.frame-scrubber { flex: 1; min-width: 60px; }
.frame-counter {
  font-size: 12px; color: var(--text-muted); font-variant-numeric: tabular-nums;
  min-width: 70px; text-align: center;
}
.speed-control { display: flex; align-items: center; gap: 4px; }
.speed-control input[type="range"] { width: 60px; }
.speed-label { font-size: 12px; color: var(--text-muted); min-width: 24px; }

/* Sidebar */
.editor-sidebar {
  width: 280px; min-width: 280px;
  display: flex; flex-direction: column;
  background: var(--bg-secondary); border-left: 1px solid var(--border);
  overflow-y: auto;
}
.sidebar-section { padding: 12px; border-bottom: 1px solid var(--border); }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.section-header h3 { font-size: 14px; font-weight: 700; }

.quick-actions { display: flex; gap: 6px; margin-bottom: 10px; }
.quick-actions .btn { flex: 1; justify-content: center; }

/* Caption list */
.caption-list-empty {
  padding: 1.5rem 1rem; text-align: center; color: var(--text-muted); font-size: 13px; line-height: 1.6;
}
.caption-list-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--radius-sm);
  cursor: pointer; transition: background .1s;
  border: 1px solid transparent; margin-bottom: 4px;
}
.caption-list-item:hover { background: var(--bg-tertiary); }
.caption-list-item.selected { background: var(--accent-dim); border-color: var(--accent); }
.caption-color-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.caption-item-text {
  flex: 1; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.caption-item-range { font-size: 11px; color: var(--text-muted); font-variant-numeric: tabular-nums; }

/* Caption editor */
.caption-editor h3 { font-size: 14px; font-weight: 700; margin-bottom: 12px; }
.delete-caption-btn { margin-top: 20px; }

/* Timeline */
.editor-timeline {
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 0 0 4px;
}
.timeline-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 16px 4px;
}
.timeline-header h3 { font-size: 13px; font-weight: 700; color: var(--text-secondary); }
.timeline-hint { font-size: 11px; color: var(--text-muted); }

#timeline { overflow-x: auto; touch-action: none; }
#timeline svg { display: block; }

/* D3 brush overrides */
.caption-brush .overlay { fill: transparent; }
.caption-brush .selection { cursor: grab; }
.caption-brush .selection:active { cursor: grabbing; }
.caption-brush .handle { cursor: ew-resize; }

/* ── Overlays ─────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.overlay-content { text-align: center; }
.spinner {
  width: 40px; height: 40px; margin: 0 auto 1rem;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text, .progress-text {
  font-size: 15px; color: var(--text-secondary);
}
.progress-bar {
  width: 240px; height: 6px; background: var(--bg-tertiary);
  border-radius: 3px; margin-top: 12px; overflow: hidden;
}
.progress-bar-fill {
  height: 100%; width: 0; background: var(--accent);
  border-radius: 3px; transition: width .15s;
}

/* ── Legacy pages (create, gif viewer) ────── */
.container {
  max-width: 640px; margin: 3rem auto; padding: 2rem;
  background: var(--bg-secondary); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.container h1 { margin-bottom: 1rem; }
.container nav { margin-top: 1.5rem; }
.container form { margin-top: 1.5rem; }
.container input[type="file"] { display: block; margin-bottom: 1rem; color: var(--text-secondary); }

.result {
  margin-top: 1.5rem; padding: 1rem;
  background: rgba(16, 185, 129, .12); border: 1px solid var(--success);
  border-radius: var(--radius-sm); color: var(--success);
}
.error {
  margin-top: 1.5rem; padding: 1rem;
  background: rgba(239, 68, 68, .12); border: 1px solid var(--danger);
  border-radius: var(--radius-sm); color: var(--danger);
}

#gif-container { margin-top: 1.5rem; text-align: center; }
#gif-image { max-width: 100%; border-radius: var(--radius-sm); margin-bottom: 1rem; }

/* ── Mobile sidebar toggle ────────────────── */
.sidebar-toggle,
.timeline-toggle {
  display: none; /* hidden on desktop, shown on mobile via media query */
  width: 100%; padding: 10px 16px;
  background: var(--bg-tertiary); color: var(--text-primary);
  border: none; border-bottom: 1px solid var(--border);
  font-size: 14px; font-weight: 700; font-family: inherit;
  cursor: pointer; text-align: left;
  align-items: center; gap: 6px;
}
.sidebar-toggle::after,
.timeline-toggle::after {
  content: '\25BC'; font-size: 10px; margin-left: auto; transition: transform .2s;
}
.sidebar-toggle.collapsed::after,
.timeline-toggle.collapsed::after { transform: rotate(-90deg); }

/* ── Share Modal ─────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: 12px; padding: 1.5rem; width: 100%; max-width: 480px;
  position: relative; animation: modalIn .2s ease-out;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.modal-close {
  position: absolute; top: 12px; right: 12px; background: none; border: none;
  color: var(--text-muted); font-size: 1.5rem; cursor: pointer; line-height: 1;
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
}
.modal-close:hover { color: var(--text); background: var(--bg-base); }
.modal-title { font-size: 1.25rem; margin-bottom: 1rem; }
.modal-sm { max-width: 340px; text-align: center; }
.modal-body-text { font-size: .9rem; color: var(--text-secondary); margin-bottom: 1.25rem; line-height: 1.5; }
.modal-actions { display: flex; gap: .75rem; justify-content: center; }
.modal-actions .btn { min-width: 100px; justify-content: center; }
.share-preview {
  border-radius: 8px; overflow: hidden; margin-bottom: 1rem;
  background: var(--bg-base); display: flex; justify-content: center;
}
.share-preview img { max-width: 100%; max-height: 260px; display: block; }
.share-link-row {
  display: flex; gap: .5rem; margin-bottom: 1rem;
}
.share-url-input {
  flex: 1; padding: .5rem .75rem; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-base);
  color: var(--text); font-size: .875rem; outline: none;
}
.share-url-input:focus { border-color: var(--accent); }
.share-buttons { display: flex; flex-direction: column; gap: .5rem; }
.share-social {
  display: flex; gap: .5rem; justify-content: center;
}
.share-status {
  margin-top: .75rem; font-size: .85rem; text-align: center;
  color: var(--text-muted); min-height: 1.2em;
}
.share-status.success { color: #22c55e; }
.share-status.error { color: #ef4444; }

/* ── Responsive ──────────────────────────── */

/* Tablets & small desktops */
@media (max-width: 900px) {
  .editor-sidebar { width: 240px; min-width: 240px; }
}

/* Mobile */
@media (max-width: 768px) {
  /* Landing */
  .landing-features { grid-template-columns: 1fr; }
  .landing-header h1 { font-size: 2rem; }
  .landing-upload { padding: 2rem 1.5rem; }
  .landing-footer { display: none; } /* keyboard shortcuts irrelevant on mobile */

  /* Editor layout: vertical stack */
  .editor-main { flex-direction: column; }
  .editor-sidebar {
    width: 100%; min-width: 0;
    border-left: none; border-top: 1px solid var(--border);
    max-height: 45vh; /* prevent sidebar from eating the whole screen */
  }

  /* Show mobile toggles */
  .sidebar-toggle { display: flex; }
  .timeline-toggle { display: flex; }

  /* Sidebar collapsible */
  .editor-sidebar.mobile-collapsed .sidebar-section,
  .editor-sidebar.mobile-collapsed .caption-editor { display: none; }

  /* Timeline collapsible */
  .editor-timeline.mobile-collapsed .timeline-header,
  .editor-timeline.mobile-collapsed #timeline { display: none; }

  /* Compact playback bar */
  .playback-controls {
    flex-wrap: wrap; gap: 6px; padding: 6px 10px;
  }
  .speed-control { display: none; } /* hide speed on mobile — save space */
  .frame-counter { font-size: 11px; min-width: 50px; }

  /* Larger touch targets for controls */
  .ctrl-btn { width: 44px; height: 44px; }
  .ctrl-btn-play { width: 48px; height: 48px; }

  /* Timeline touch improvements */
  .editor-timeline { padding: 0 0 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .caption-brush .handle { width: 12px !important; } /* wider drag handles on touch */

  /* Canvas area fills remaining space */
  .canvas-container { padding: 8px; min-height: 180px; }

  /* Buttons */
  .btn { padding: 10px 16px; font-size: 14px; }
  .btn-xs { padding: 6px 12px; font-size: 13px; }
  .btn-small { padding: 8px 14px; }

  /* Header compact */
  .editor-header { padding: 0 10px; height: 44px; min-height: 44px; }
  .editor-header .btn { padding: 6px 10px; font-size: 13px; }

  /* Sliders — bigger thumb for touch */
  input[type="range"]::-webkit-slider-thumb { width: 24px; height: 24px; }
  input[type="range"]::-moz-range-thumb { width: 24px; height: 24px; }
}

/* Very small phones */
@media (max-width: 400px) {
  .header-actions { gap: 4px; }
  .editor-header .btn svg { display: none; }  /* icon-only on tiny screens */
  .landing-header h1 { font-size: 1.7rem; }
  .editor-sidebar { max-height: 50vh; }
  .quick-actions { flex-direction: column; }
}