/* =====================================================
   Zooniverse Web UI — Styles
   ===================================================== */

:root {
  --bg: #0f1117;
  --bg-card: #1a1b23;
  --bg-hover: #252731;
  --border: #2a2d3a;
  --text: #e1e4ed;
  --text-dim: #8b8fa3;
  --accent: #5b8def;
  --accent-hover: #7aa3ff;
  --success: #34d399;
  --error: #f87171;
  --warning: #fbbf24;
  --gold: #f59e0b;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

/* ─── Layout ─── */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.header .logo { font-weight: 700; font-size: 18px; color: var(--accent); }
.header .logo span { color: var(--text-dim); font-weight: 400; }
.header .user-info { font-size: 13px; color: var(--text-dim); }
.header .user-info .name { color: var(--text); }

.main-layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* ─── Left: Subject area ─── */
.subject-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  min-width: 0;
  overflow-y: auto;
}

.workflow-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  flex-shrink: 0;
}
.workflow-bar input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  max-width: 300px;
}
.workflow-bar input:focus { border-color: var(--accent); }
.workflow-bar button {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  transition: background .15s;
}
.workflow-bar button:hover { background: var(--accent-hover); }

/* Subject image */
.image-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  min-height: 300px;
  position: relative;
  overflow: hidden;
  cursor: crosshair;
}
.image-area img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* Drawing canvas overlay */
.drawing-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  display: none;
}
.drawing-canvas.active { display: block; }

/* Multi-image flipbook support */
.multi-image-nav {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-top: 8px;
  flex-shrink: 0;
}
.multi-image-nav button {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 32px; height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.multi-image-nav button:hover { background: var(--bg-hover); }
.multi-image-nav button.active { border-color: var(--accent); color: var(--accent); }

/* ─── Question & Options ─── */
.question-area {
  flex-shrink: 0;
  padding: 14px 0 4px;
}
.question-text {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.5;
}

.options-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.option-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  transition: all .15s;
  user-select: none;
  min-width: 80px;
}
.option-btn:hover { background: var(--bg-hover); border-color: var(--accent); }
.option-btn .key-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
}

/* Drawing tools bar */
.drawing-tools {
  display: none;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.drawing-tools.active { display: flex; }
.drawing-tools .tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  transition: all .15s;
}
.drawing-tools .tool-btn:hover { background: var(--bg-hover); }
.drawing-tools .tool-btn.active { border-color: var(--accent); }
.drawing-tools .tool-btn .color-swatch {
  width: 14px; height: 14px;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,.2);
}

/* ─── Right sidebar ─── */
.sidebar {
  width: 320px;
  flex-shrink: 0;
  background: var(--bg-card);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-section:last-child { border-bottom: none; }
.sidebar-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

/* Accuracy stats */
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
  font-size: 14px;
}
.stat-row .label { color: var(--text-dim); }
.stat-row .value { font-weight: 600; }
.stat-row .value.good { color: var(--success); }
.stat-row .value.bad { color: var(--error); }
.stat-row .value.warn { color: var(--warning); }

.accuracy-ring {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}
.accuracy-ring svg { width: 80px; height: 80px; transform: rotate(-90deg); }
.accuracy-ring .bg { fill: none; stroke: var(--border); stroke-width: 6; }
.accuracy-ring .fg {
  fill: none;
  stroke: var(--success);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset .5s ease;
}
.accuracy-ring .center-text {
  font-size: 20px;
  font-weight: 700;
  fill: var(--text);
}

/* Feedback box */
.feedback-box {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.5;
  margin-top: 6px;
  display: none;
}
.feedback-box.show { display: block; }
.feedback-box.correct {
  background: rgba(52, 211, 153, .12);
  border: 1px solid rgba(52, 211, 153, .3);
  color: var(--success);
}
.feedback-box.wrong {
  background: rgba(248, 113, 113, .12);
  border: 1px solid rgba(248, 113, 113, .3);
  color: var(--error);
}
.feedback-box.info {
  background: rgba(91, 141, 239, .12);
  border: 1px solid rgba(91, 141, 239, .3);
  color: var(--accent);
}

/* Shortcuts settings */
.shortcut-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  font-size: 13px;
}
.shortcut-row .action-label { flex: 1; color: var(--text-dim); }
.shortcut-row .key-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px; height: 26px;
  padding: 0 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  transition: all .15s;
}
.shortcut-row .key-badge:hover { border-color: var(--accent); }
.shortcut-row .key-badge.listening {
  border-color: var(--warning);
  color: var(--warning);
  animation: pulse 1s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}

/* Toggle switch */
.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  font-size: 13px;
}
.toggle-row .label { color: var(--text-dim); }
.toggle {
  width: 40px; height: 22px;
  background: var(--border);
  border-radius: 11px;
  cursor: pointer;
  position: relative;
  transition: background .2s;
}
.toggle.on { background: var(--accent); }
.toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform .2s;
}
.toggle.on::after { transform: translateX(18px); }

/* ─── Auto-play controls ─── */
.autoplay-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 6px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-shrink: 0;
}
/* 合并成一行工具栏：播放—缩放—移动—亮度对比度 */
.image-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  padding: 6px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
  flex-shrink: 0;
}
.image-toolbar .autoplay-controls {
  margin-top: 0;
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
}
.tb-sep {
  display: none;
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}
.ap-btn {
  width: 32px; height: 32px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
.ap-btn:hover { background: var(--accent-hover); }
.ap-btn.paused { background: var(--warning); }
.ap-btn.paused:hover { background: #fbbf24; }

.ap-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: 4px;
}
.ap-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  max-width: 100px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}
.ap-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}
.ap-slider::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}
.ap-speed-label {
  font-size: 12px;
  color: var(--text);
  min-width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ─── Options display in sidebar ─── */
.options-display-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  font-size: 13px;
}
.options-display-item .key-badge-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}
.options-display-item .opt-label {
  color: var(--text);
}
.option-img {
  max-width: 120px;
  max-height: 60px;
  display: inline-block;
  vertical-align: middle;
  border-radius: 4px;
  margin-left: 4px;
}
.options-display-item .opt-selected {
  color: var(--warning);
  font-size: 11px;
  margin-left: auto;
}

.diff-canvas-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  display: none;
  object-fit: contain;
}
.diff-canvas-overlay.active { display: block; }

/* ─── Login overlay ─── */
.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px;
  width: 380px;
  box-shadow: var(--shadow);
}
.login-card h1 {
  font-size: 22px;
  margin-bottom: 6px;
}
.login-card p.sub {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 24px;
}
.login-card .form-group {
  margin-bottom: 14px;
}
.login-card label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.login-card input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
}
.login-card input:focus { border-color: var(--accent); }
.login-card .login-btn {
  width: 100%;
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 11px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background .15s;
}
.login-card .login-btn:hover { background: var(--accent-hover); }
.login-card .login-btn:disabled { opacity: .5; cursor: not-allowed; }
.login-card .error-msg {
  color: var(--error);
  font-size: 13px;
  margin-top: 10px;
  display: none;
}
.login-card .error-msg.show { display: block; }

/* ─── Logged-out bar (inside app) ─── */
.logged-out-bar {
  display: none;
  padding: 8px 16px;
  background: rgba(248,113,113,.1);
  border-bottom: 1px solid rgba(248,113,113,.2);
  color: var(--error);
  font-size: 13px;
  text-align: center;
}

/* ─── Status / snackbar ─── */
.status-msg {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: var(--shadow);
  z-index: 200;
  transition: opacity .3s;
  opacity: 0;
  pointer-events: none;
}
.status-msg.show {
  opacity: 1;
  pointer-events: auto;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .sidebar { width: 260px; }
}
@media (max-width: 640px) {
  .main-layout { flex-direction: column; }
  .sidebar { width: 100%; border-left: none; border-top: 1px solid var(--border); max-height: 40vh; }
}

/* ─── Scrollbars ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ─── Loading spinner ─── */
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 40px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── AI Assistant ─── */
.ai-reasoning-wrap { margin-bottom: 8px; }
.ai-reasoning-wrap summary {
  cursor: pointer;
  font-size: 11px;
  color: var(--text-dim);
  padding: 4px 0;
  user-select: none;
}
.ai-reasoning-wrap summary:hover { color: var(--text); }
.ai-reasoning {
  padding: 8px 10px;
  background: var(--bg);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.5;
  margin-top: 4px;
}
.ai-suggestion-header {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 4px;
  font-weight: 600;
}
.ai-suggestion-answer {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  background: rgba(91, 141, 239, .1);
  border-radius: 6px;
  margin-bottom: 6px;
  font-size: 12px;
}
.ai-path-header {
  font-size: 11px;
  color: var(--text-dim);
  margin: 8px 0 4px;
  font-weight: 600;
}
.ai-path-step {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 4px;
  font-size: 12px;
  border-radius: 4px;
}
.ai-path-step.current { background: rgba(91, 141, 239, .08); }
.ai-path-step.done { opacity: .45; }
.step-task { color: var(--accent); font-weight: 600; font-size: 11px; min-width: 24px; }
.step-arrow { color: var(--text-dim); font-size: 10px; }
.step-answer { color: var(--text); flex: 1; }
.step-confidence { font-size: 10px; padding: 1px 5px; border-radius: 3px; font-weight: 600; }
.step-confidence.high { background: rgba(52, 211, 153, .15); color: var(--success); }
.step-confidence.mid { background: rgba(251, 191, 36, .15); color: var(--warning); }
.step-confidence.low { background: rgba(248, 113, 113, .15); color: var(--error); }
.ai-adopt-btn {
  width: 100%;
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 5px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: opacity .15s;
  margin-bottom: 4px;
}
.ai-adopt-btn:hover { opacity: .85; }
.ai-adopt-btn:disabled { opacity: .4; cursor: not-allowed; }
.ai-error {
  padding: 8px;
  background: rgba(248, 113, 113, .1);
  border: 1px solid rgba(248, 113, 113, .2);
  border-radius: 6px;
  color: var(--error);
  font-size: 12px;
}