/* ════════════════════════════════════════════════
   Shark Scar Annotator — Dark Theme
   ════════════════════════════════════════════════ */

:root {
  --bg-base:      #0f1117;
  --bg-panel:     #1a1d27;
  --bg-card:      #242736;
  --bg-hover:     #2d3148;
  --border:       #2e3250;
  --accent:       #4a90d9;
  --accent-hover: #5ba3ed;
  --danger:       #ef4444;
  --success:      #10b981;
  --warning:      #f59e0b;
  --text-primary: #e8eaf0;
  --text-muted:   #6b7280;
  --text-label:   #9ca3af;
  --scar-color:   #ff6b6b;
  --body-color:   #4a90d9;
  --kp-color:     #10b981;
  --obs-color:    #c084fc;
  --zone-default: rgba(74, 144, 217, 0.15);
  --zone-hover:   rgba(74, 144, 217, 0.35);
  --zone-active:  rgba(74, 144, 217, 0.6);
}

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

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 13px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ─── HEADER ─── */
.header {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  height: 44px;
  flex-shrink: 0;
  z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 8px; }
.logo { font-weight: 700; font-size: 15px; letter-spacing: 0.3px; }
.header-video-name { color: var(--text-muted); font-size: 12px; max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header-right { display: flex; align-items: center; gap: 8px; }
.header-user { color: var(--text-muted); font-size: 12px; }

/* ─── WORKSPACE ─── */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ─── PANELS ─── */
.panel-left,
.panel-right {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  width: 220px;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.panel-right {
  border-right: none;
  border-left: 1px solid var(--border);
  width: 260px;
}
.panel-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-base);
}

/* ─── PANEL TABS ─── */
.panel-tabs { display: flex; gap: 2px; margin-bottom: 6px; }
.tab-btn {
  flex: 1; padding: 5px; border: none; border-radius: 4px;
  background: var(--bg-card); color: var(--text-muted); cursor: pointer; font-size: 12px;
}
.tab-btn.active { background: var(--accent); color: #fff; }
.tab-content { display: none; flex-direction: column; gap: 4px; }
.tab-content.active { display: flex; }

/* ─── VIDEO SECTION ─── */
.video-section {
  background: #000;
  flex-shrink: 0;
  position: relative;
}
#video-element {
  width: 100%;
  max-height: 220px;
  display: block;
  object-fit: contain;
  background: #000;
}
.video-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.ctrl-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
  white-space: nowrap;
}
.ctrl-btn:hover { background: var(--bg-hover); }
.seek-bar-wrap { flex: 1; min-width: 100px; }
.seek-bar { width: 100%; accent-color: var(--accent); }
.time-display, .frame-display { color: var(--text-muted); font-size: 11px; white-space: nowrap; }
.speed-select {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-primary); border-radius: 4px; padding: 2px 4px; font-size: 11px;
}

/* ─── CANVAS ─── */
.canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: crosshair;
  background: #111;
}
#annotation-canvas {
  position: absolute;
  top: 0; left: 0;
  touch-action: none;
}
.bbox-label-popup {
  position: absolute;
  background: var(--bg-panel);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 4px 6px;
  z-index: 50;
}
.bbox-label-popup input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  outline: none;
  font-size: 12px;
  width: 160px;
}

/* ─── ENHANCE BAR ─── */
.enhance-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 5px 10px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.enhance-bar label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-label);
  font-size: 12px;
}
.enhance-bar input[type=range] { width: 110px; accent-color: var(--accent); }
.enhance-bar span { min-width: 34px; color: var(--text-primary); }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 6px 12px; border-radius: 6px; border: none; cursor: pointer;
  font-size: 13px; font-weight: 500; gap: 4px; transition: background 0.15s;
}
.btn-primary  { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-success  { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); }
.btn-ghost { background: transparent; color: var(--text-primary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-card); }
.btn-sm { padding: 3px 8px; font-size: 11px; }
.btn-block { width: 100%; }
.btn-lg { padding: 10px; font-size: 14px; }
.btn.danger, .btn.danger:hover { background: var(--danger); color: #fff; }
.mt-8 { margin-top: 8px; }

/* ─── TOOL GRID ─── */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.tool-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 5px 4px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 11px;
  text-align: center;
}
.tool-btn:hover, .tool-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.tool-btn.danger { border-color: var(--danger); }
.tool-btn.danger:hover { background: var(--danger); }

/* ─── VIDEO LIST ─── */
.video-list { display: flex; flex-direction: column; gap: 3px; }
.video-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 6px 8px;
  cursor: pointer;
  transition: background 0.1s;
}
.video-item:hover { background: var(--bg-hover); }
.video-item.selected { border-color: var(--accent); background: rgba(74,144,217,0.12); }
.video-item-name { font-weight: 500; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.video-item-meta { color: var(--text-muted); font-size: 11px; display: flex; gap: 6px; }
.status-badge {
  display: inline-block; padding: 1px 5px; border-radius: 3px; font-size: 10px; font-weight: 600;
}
.status-unassigned { background: #374151; color: #9ca3af; }
.status-assigned    { background: #1e3a5f; color: #60a5fa; }
.status-in_progress { background: #3b2f00; color: var(--warning); }
.status-completed   { background: #064e3b; color: var(--success); }

/* ─── INPUTS ─── */
.input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 12px;
  outline: none;
}
.input:focus { border-color: var(--accent); }
textarea.input { resize: vertical; min-height: 48px; }
select.input { cursor: pointer; }

.search-bar { margin-bottom: 4px; }
.search-bar input { width: 100%; }

/* ─── SECTION LABELS ─── */
.section-label {
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 4px 0 2px;
}
.field-label { color: var(--text-label); font-size: 11px; margin-top: 6px; display: block; }
.optional-label {
  color: var(--text-muted); font-size: 10px; font-style: italic;
  letter-spacing: 0.5px; margin-top: 6px;
}

.divider { border-top: 1px solid var(--border); margin: 4px 0; }

/* ─── NO-SCARS BANNER & INFO NOTE ─── */
.no-scars-banner { padding: 16px 8px; text-align: center; color: var(--text-label); }
.no-scars-banner p { margin-bottom: 12px; font-size: 13px; }
.enc-info-note { font-size: 11px; color: var(--text-muted); font-style: italic; margin: 4px 0 0; }

/* ─── RADIO GROUPS ─── */
.radio-group {
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
  margin: 2px 0;
}
.radio-group.small { font-size: 11px; }
.radio-group label { color: var(--text-label); white-space: nowrap; }
.radio-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
}
.radio-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.radio-btn.sm { padding: 2px 6px; font-size: 10px; }

/* ─── STAR RATING ─── */
.star-rating { display: flex; gap: 4px; margin: 4px 0; }
.star {
  font-size: 22px;
  color: var(--border);
  cursor: pointer;
  transition: color 0.1s;
  user-select: none;
}
.star.active, .star.hover { color: var(--warning); }

/* ─── ZONE DIAGRAM ─── */
.zone-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px;
  margin: 4px 0;
}
.zone-diagram svg { width: 100%; }
.zone-seg polygon {
  fill: var(--zone-default);
  stroke: var(--border);
  stroke-width: 1;
  cursor: pointer;
  transition: fill 0.15s;
}
.zone-seg:hover polygon { fill: var(--zone-hover); }
.zone-seg.active polygon { fill: var(--zone-active); stroke: var(--accent); stroke-width: 2; }
.zone-seg text { fill: var(--text-primary); font-size: 11px; text-anchor: middle; dominant-baseline: middle; pointer-events: none; }
.zone-label { fill: var(--text-muted); font-size: 9px; }
.selected-zone-label { color: var(--accent); font-size: 11px; font-weight: 600; margin: 2px 0; }
#zone-svg.flipped { transform: scaleX(-1); }
#zone-svg.flipped .zone-seg text { transform: scaleX(-1); transform-box: fill-box; transform-origin: center; }

/* ─── KEYPOINT REFERENCE DIAGRAM ─── */
.kp-diagram { background: var(--bg-card); border: 1px solid var(--border); border-radius: 5px; padding: 4px; margin: 4px 0; }
.kp-diagram svg { width: 100%; }
.kp-dot { transition: all 0.2s; cursor: pointer; }
.kp-dot.pending  { fill: var(--text-muted); opacity: 0.2; }
.kp-dot.current  { fill: #f59e0b; opacity: 1; stroke: #f59e0b; stroke-width: 2; }
.kp-dot.done     { fill: #10b981; opacity: 1; }
.kp-dot.occluded { fill: #c084fc; opacity: 0.8; }
.kp-dot.skipped  { fill: var(--text-muted); opacity: 0.3; }
#kp-ref-svg.flipped { transform: scaleX(-1); }

/* ─── COLOR BUTTONS ─── */
.color-group { display: flex; gap: 4px; flex-wrap: wrap; margin: 4px 0; }
.color-btn {
  border: 2px solid transparent;
  border-radius: 4px;
  padding: 3px 7px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  transition: border-color 0.15s;
}
.color-btn.active { border-color: #fff; }

/* ─── SCARS LIST ─── */
.scars-list { display: flex; flex-direction: column; gap: 3px; }
.scar-item {
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: 4px;
  padding: 4px 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
}
.scar-item-info { flex: 1; }
.scar-item-type { font-weight: 600; color: var(--scar-color); }
.scar-item-meta { color: var(--text-muted); }
.scar-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 0 4px; font-size: 14px; }
.scar-remove:hover { color: var(--danger); }

/* ─── KEYPOINTS LIST ─── */
.kp-help { color: var(--text-muted); font-size: 10px; font-style: italic; margin-bottom: 2px; }
.kp-list { display: flex; flex-direction: column; gap: 2px; max-height: 200px; overflow-y: auto; }
.kp-item {
  font-size: 11px; display: flex; justify-content: space-between;
  padding: 2px 4px; border-radius: 3px; cursor: pointer; transition: background 0.1s;
}
.kp-item:hover { background: var(--bg-hover); }
.kp-item.done { color: var(--success); }
.kp-item.occluded { color: var(--warning); }
.kp-item.skipped { color: var(--text-muted); opacity: 0.6; }
.kp-item.current { color: var(--accent); font-weight: 600; background: rgba(74,144,217,0.1); }
.kp-item.pending { color: var(--text-muted); }

/* ─── BADGES ─── */
.badge {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1px 6px;
  font-size: 10px;
  color: var(--text-muted);
}

/* ─── STATUS ─── */
.status-msg {
  min-height: 18px;
  font-size: 11px;
  padding: 4px 0;
  color: var(--success);
}
.status-msg.error { color: var(--danger); }

.muted { color: var(--text-muted); }
.hidden { display: none !important; }

/* ─── DRIVE LIST ─── */
.drive-list { display: flex; flex-direction: column; gap: 3px; margin-top: 4px; }
.drive-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
  cursor: pointer;
  font-size: 11px;
}
.drive-item:hover { background: var(--bg-hover); }
.drive-item.folder { color: var(--warning); }
.drive-item.video  { color: var(--text-primary); }

/* ─── SHORTCUTS GRID ─── */
.shortcuts-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 8px;
  font-size: 11px;
}
.shortcuts-grid span:nth-child(odd) {
  color: var(--accent);
  font-family: monospace;
  white-space: nowrap;
}
.shortcuts-grid span:nth-child(even) { color: var(--text-muted); }

/* ─── MODAL ─── */
.modal {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
}
.modal-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  min-width: 340px;
  max-width: 90vw;
}
.modal-box h3 { margin-bottom: 16px; font-size: 16px; }
.shortcuts-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
.shortcuts-table td { padding: 5px 8px; border-bottom: 1px solid var(--border); font-size: 12px; }
.shortcuts-table td:first-child { font-family: monospace; color: var(--accent); width: 90px; }

/* ─── SCROLLBARS ─── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── DROPDOWN ─── */
.dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute; right: 0; top: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  z-index: 200;
  min-width: 160px;
  padding: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.dropdown:hover .dropdown-menu,
.dropdown-menu:hover { display: block; }
.dropdown-item {
  display: block;
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 12px;
  text-decoration: none;
}
.dropdown-item:hover { background: var(--bg-hover); }

/* Keypoint visibility toggles */
.kp-vis-toggles { display: inline-flex; gap: 2px; margin-left: auto; margin-right: 4px; position: relative; z-index: 1; }
.kp-vis-btn {
  width: 22px; height: 22px; font-size: 11px; padding: 0;
  border: 1px solid var(--border); border-radius: 3px;
  background: transparent; color: var(--text-muted); cursor: pointer;
  line-height: 20px; text-align: center;
}
.kp-vis-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.kp-vis-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.kp-item { display: flex; align-items: center; gap: 4px; }

/* ─── Tutorial Feature Tour ─────────────────────────────────── */
.tutorial-overlay {
  position: fixed; inset: 0; z-index: 2000;
}
.tutorial-spotlight {
  position: fixed;
  border-radius: 8px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.72);
  z-index: 2001;
  transition: left 0.3s ease, top 0.3s ease, width 0.3s ease, height 0.3s ease;
  pointer-events: none;
}
.tutorial-tooltip {
  position: fixed;
  z-index: 2002;
  background: var(--bg-panel);
  border: 2px solid var(--accent);
  border-radius: 10px;
  padding: 20px 24px;
  max-width: 360px;
  min-width: 280px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}
.tutorial-tooltip h4 {
  color: var(--accent);
  font-size: 15px;
  margin: 0 0 8px;
}
.tutorial-tooltip p {
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.6;
  margin: 0 0 16px;
}
.tutorial-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tutorial-steps {
  color: var(--text-label);
  font-size: 12px;
}
.tutorial-btn-skip {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  margin-right: 10px;
  padding: 6px 8px;
}
.tutorial-btn-skip:hover { color: var(--text-primary); }
.tutorial-btn-next {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
}
.tutorial-btn-next:hover { filter: brightness(1.1); }

/* Info icons — per-section tutorial help */
.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  font-size: 10px;
  font-style: italic;
  font-weight: 700;
  font-family: Georgia, serif;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  cursor: pointer;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1;
  padding: 0;
}
.info-icon:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Save flash animation */
.save-flash {
  animation: saveFlash 0.6s ease;
}
@keyframes saveFlash {
  0%, 100% { background: var(--bg-card); }
  30% { background: rgba(16, 185, 129, 0.3); }
}

/* ─── PROGRESS STRIP ─── */
.progress-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  height: 24px;
}
.progress-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}
.progress-track {
  flex: 1;
  height: 8px;
  background: var(--bg-base);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--success);
  border-radius: 4px;
  transition: width 0.4s ease;
}