/* ─── Feynman page overrides (loaded after test.css) ─── */

body.feynman-page {
  background:
    radial-gradient(circle at top left, rgba(196, 122, 26, 0.14), transparent 26rem),
    linear-gradient(180deg, #fbf7ef 0%, #f3efe5 100%);
}

.feynman-kicker {
  background: rgba(196, 122, 26, 0.14);
  color: #c47a1a;
}

.feynman-chip {
  background: rgba(196, 122, 26, 0.14);
  color: #c47a1a;
}

.feynman-button {
  background: #c47a1a;
  border-color: #c47a1a;
}

.feynman-button:hover {
  background: #a86815;
  border-color: #a86815;
}

.feynman-skills-card {
  border-left: 3px solid rgba(196, 122, 26, 0.4);
}

.feynman-skills-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.feynman-skills-list li {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  padding: 5px 10px;
  border-radius: 8px;
  background: rgba(196, 122, 26, 0.08);
  color: var(--color-text);
}

.feynman-skills-empty {
  color: var(--color-text-faint);
  background: transparent !important;
  font-style: italic;
}

.feynman-frames-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(19, 38, 73, 0.08);
  color: #556677;
}

.feynman-frames-badge.has-frames {
  background: rgba(39, 174, 96, 0.14);
  color: #1a8a4a;
}

/* ─── Dark mode ─── */

[data-theme="dark"] body.feynman-page,
[data-theme="dark"].feynman-page {
  background:
    radial-gradient(circle at top left, rgba(196, 122, 26, 0.1), transparent 26rem),
    linear-gradient(180deg, #141414 0%, #1a1a1a 100%);
}

[data-theme="dark"] .feynman-kicker {
  background: rgba(224, 160, 64, 0.15);
  color: #e0a040;
}

[data-theme="dark"] .feynman-chip {
  background: rgba(224, 160, 64, 0.15);
  color: #e0a040;
}

[data-theme="dark"] .feynman-button {
  background: #e0a040;
  border-color: #e0a040;
  color: #141414;
}

[data-theme="dark"] .feynman-button:hover {
  background: #c88c30;
  border-color: #c88c30;
}

[data-theme="dark"] .feynman-skills-card {
  border-left-color: rgba(224, 160, 64, 0.35);
}

[data-theme="dark"] .feynman-skills-list li {
  background: rgba(224, 160, 64, 0.1);
}

[data-theme="dark"] .feynman-frames-badge {
  background: rgba(255, 255, 255, 0.06);
  color: #8899aa;
}

[data-theme="dark"] .feynman-frames-badge.has-frames {
  background: rgba(95, 168, 95, 0.15);
  color: #5fa85f;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) body.feynman-page,
  :root:not([data-theme]).feynman-page,
  body.feynman-page {
    background:
      radial-gradient(circle at top left, rgba(196, 122, 26, 0.1), transparent 26rem),
      linear-gradient(180deg, #141414 0%, #1a1a1a 100%);
  }

  :root:not([data-theme]) .feynman-kicker {
    background: rgba(224, 160, 64, 0.15);
    color: #e0a040;
  }

  :root:not([data-theme]) .feynman-chip {
    background: rgba(224, 160, 64, 0.15);
    color: #e0a040;
  }

  :root:not([data-theme]) .feynman-button {
    background: #e0a040;
    border-color: #e0a040;
    color: #141414;
  }

  :root:not([data-theme]) .feynman-button:hover {
    background: #c88c30;
    border-color: #c88c30;
  }

  :root:not([data-theme]) .feynman-skills-card {
    border-left-color: rgba(224, 160, 64, 0.35);
  }

  :root:not([data-theme]) .feynman-skills-list li {
    background: rgba(224, 160, 64, 0.1);
  }

  :root:not([data-theme]) .feynman-frames-badge {
    background: rgba(255, 255, 255, 0.06);
    color: #8899aa;
  }

  :root:not([data-theme]) .feynman-frames-badge.has-frames {
    background: rgba(95, 168, 95, 0.15);
    color: #5fa85f;
  }
}

/* ═══════════════════════════════════════════════════════════
   Debug Panel (Ctrl+D)
   ═══════════════════════════════════════════════════════════ */

.feynman-debug-overlay {
  position: fixed;
  top: var(--header-height, 56px);
  right: 0;
  bottom: 0;
  width: min(460px, 42vw);
  z-index: 9000;
  display: flex;
  justify-content: flex-end;
  align-items: stretch;
  padding: 0;
  overflow: hidden;
  background: transparent;
  box-shadow: -12px 0 24px rgba(0, 0, 0, 0.12);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.feynman-debug-overlay.hidden {
  transform: translateX(100%);
  opacity: 0;
  pointer-events: none;
}

.feynman-debug-panel {
  width: 100%;
  max-width: none;
  height: 100%;
  background: #1a1a1e;
  border-radius: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: -24px 0 80px rgba(0, 0, 0, 0.42);
}

.feynman-debug-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: #141416;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.feynman-debug-title {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: #e0a040;
  letter-spacing: 0.03em;
}

.feynman-debug-timing {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: #6a7a8a;
  margin-left: auto;
}

.feynman-debug-copy {
  background: rgba(224, 160, 64, 0.08);
  border: 1px solid rgba(224, 160, 64, 0.35);
  color: #e0a040;
  border-radius: 6px;
  padding: 5px 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  cursor: pointer;
}

.feynman-debug-copy:hover {
  background: rgba(224, 160, 64, 0.14);
  border-color: rgba(224, 160, 64, 0.55);
}

.feynman-debug-close {
  background: none;
  border: none;
  color: #6a7a8a;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.feynman-debug-close:hover {
  color: #e0a040;
}

.feynman-debug-body {
  overflow-y: auto;
  padding: 16px 20px;
  flex: 1;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.55;
  color: #c8ccd0;
}

.feynman-debug-empty {
  color: #556677;
  font-style: italic;
}

.feynman-debug-empty kbd {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
}

.dbg-note {
  color: #7f8b96;
  font-size: 0.74rem;
}

/* Stage sections */
.dbg-stage {
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  overflow: hidden;
}

.dbg-stage-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  cursor: default;
  user-select: none;
}

.dbg-stage-name {
  font-weight: 600;
  color: #e0a040;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.dbg-stage-meta {
  color: #556677;
  font-size: 0.72rem;
  margin-left: auto;
}

.dbg-stage-meta .dbg-ok { color: #5fa85f; }
.dbg-stage-meta .dbg-err { color: #e74c3c; }
.dbg-stage-meta .dbg-warn { color: #e0a040; }

/* Collapsible sections within a stage */
.dbg-section {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.dbg-section-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  color: #8899aa;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  cursor: pointer;
  text-align: left;
}

.dbg-section-toggle:hover {
  background: rgba(255, 255, 255, 0.03);
  color: #c8ccd0;
}

.dbg-section-toggle .dbg-chevron {
  transition: transform 0.15s;
  font-size: 0.65rem;
}

.dbg-section-toggle.open .dbg-chevron {
  transform: rotate(90deg);
}

.dbg-section-toggle .dbg-section-label {
  flex: 1;
}

.dbg-section-toggle .dbg-section-hint {
  color: #445566;
  font-size: 0.7rem;
}

.dbg-section-content {
  display: none;
  padding: 0 14px 12px 14px;
}

.dbg-section-content.open {
  display: block;
}

.dbg-pre {
  background: #111113;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 400px;
  overflow-y: auto;
  color: #a8b8c8;
  font-size: 0.74rem;
  line-height: 1.5;
}

.dbg-pre.dbg-pre--code {
  color: #88c8ff;
}

.dbg-pre.dbg-pre--error {
  color: #e74c3c;
  border-color: rgba(231, 76, 60, 0.2);
}

/* Skills badges inside debug */

@media (max-width: 960px) {
  .feynman-debug-overlay {
    top: 0;
    width: 100vw;
  }
}
.dbg-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 4px 0;
}

.dbg-skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.72rem;
}

.dbg-skill-badge.loaded {
  background: rgba(95, 168, 95, 0.15);
  color: #5fa85f;
}

.dbg-skill-badge.failed {
  background: rgba(231, 76, 60, 0.15);
  color: #e74c3c;
}

/* Execution result */
.dbg-exec {
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.74rem;
}

.dbg-exec-status {
  font-weight: 600;
}

.dbg-exec-status.success { color: #5fa85f; }
.dbg-exec-status.failed { color: #e74c3c; }
.dbg-exec-status.fallback { color: #e0a040; }

/* Key-value pairs */
.dbg-kv {
  display: flex;
  gap: 8px;
  padding: 2px 0;
}

.dbg-kv-key {
  color: #6a7a8a;
  min-width: 120px;
}

.dbg-kv-val {
  color: #c8ccd0;
}

/* ── Layer & Element Toggle Panel ── */

.viz-layer-toggles {
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--color-divider, #d4d0c8);
}

.viz-layer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.viz-layer-categories {
  margin-bottom: 0.35rem;
}

.viz-layer-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font: 600 0.72rem/1.2 var(--font-body, 'Satoshi', sans-serif);
  color: var(--color-text-muted, #6b6860);
  background: var(--color-surface-2, #f0ede6);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s;
}

.viz-layer-chip:hover {
  background: var(--color-primary-highlight, #f5e6cc);
}

.viz-layer-chip input[type="checkbox"] {
  width: 0.8rem;
  height: 0.8rem;
  margin: 0;
  accent-color: var(--color-primary, #c47a1a);
}

.viz-layer-chip:has(input:not(:checked)) {
  opacity: 0.5;
  text-decoration: line-through;
}

/* Element-level toggles */
.viz-layer-elements {
  padding-top: 0.25rem;
  border-top: 1px dashed var(--color-divider, #d4d0c8);
  margin-top: 0.25rem;
}

.viz-layer-elements:empty {
  display: none;
}

.viz-element-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.15rem 0.4rem;
  border-radius: 9999px;
  font: 500 0.68rem/1.2 var(--font-body, 'Satoshi', sans-serif);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, opacity 0.15s;
}

.viz-element-chip input[type="checkbox"] {
  width: 0.7rem;
  height: 0.7rem;
  margin: 0;
}

.viz-element-chip:has(input:not(:checked)) {
  opacity: 0.4;
  text-decoration: line-through;
}

.viz-element-icon {
  font-size: 0.75rem;
}

.viz-element-vectors {
  background: rgba(231, 76, 60, 0.12);
  color: #c0392b;
}
.viz-element-vectors input { accent-color: #c0392b; }

.viz-element-labels {
  background: rgba(52, 152, 219, 0.12);
  color: #2471a3;
}
.viz-element-labels input { accent-color: #2471a3; }

.viz-element-measurement {
  background: rgba(46, 139, 87, 0.12);
  color: #2e8b57;
}
.viz-element-measurement input { accent-color: #2e8b57; }

.viz-element-trails {
  background: rgba(155, 89, 182, 0.12);
  color: #7d3c98;
}
.viz-element-trails input { accent-color: #7d3c98; }

.viz-element-fields {
  background: rgba(243, 156, 18, 0.12);
  color: #b7950b;
}
.viz-element-fields input { accent-color: #b7950b; }

/* ─── Explore Mode ─── */

body.explore-mode .test-panel-inner { display: none; }
body.explore-mode .explore-panel { display: flex !important; }

.explore-panel {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  padding: 20px 24px;
  gap: 12px;
}

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

.explore-back-btn {
  background: none;
  border: 1px solid var(--color-divider, #ddd);
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  color: inherit;
  display: flex;
  align-items: center;
  transition: background 0.15s;
}
.explore-back-btn:hover { background: var(--color-surface-offset, #f5f5f5); }
.explore-back-btn svg { width: 16px; height: 16px; }

.explore-title {
  font-family: var(--font-display, 'Instrument Serif', serif);
  font-size: 1.4rem;
  font-weight: 400;
  margin: 0;
  flex: 1;
}

.explore-domain-chip {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(196, 122, 26, 0.12);
  color: #c47a1a;
  font-weight: 600;
}

.explore-problem {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-text-secondary, #555);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--color-surface-offset, #fafafa);
  border-left: 3px solid var(--color-primary, #c47a1a);
}

.explore-section {
  border: 1px solid var(--color-divider, #e8e8e8);
  border-radius: 10px;
  padding: 12px 16px;
  background: var(--color-surface, #fff);
}

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

.explore-section-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--color-text-secondary, #888);
}

.explore-reset-btn {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 6px;
  border: 1px solid var(--color-divider, #ddd);
  background: none;
  cursor: pointer;
  color: inherit;
  transition: background 0.15s;
}
.explore-reset-btn:hover { background: var(--color-surface-offset, #f5f5f5); }

/* Equations */
.explore-equations-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.explore-equation {
  padding: 8px 12px;
  border-radius: 6px;
  border-left: 3px solid transparent;
  transition: background 0.3s, border-color 0.3s;
  overflow-x: auto;
  text-align: center;
}

.explore-equation--active {
  background: rgba(196, 122, 26, 0.1);
  border-left-color: #c47a1a;
}

/* Sliders */
.explore-sliders {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.explore-slider-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.explore-slider-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.85rem;
}

.explore-slider-name {
  font-weight: 500;
}

.explore-slider-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: #c47a1a;
  font-weight: 600;
}

.explore-slider {
  width: 100%;
  height: 4px;
  accent-color: #c47a1a;
  cursor: pointer;
}

/* Narrative */
.explore-narrative {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-text-secondary, #666);
  font-style: italic;
}

/* Chat */
.explore-chat-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 200px;
}

.explore-chat {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 0;
  min-height: 120px;
  max-height: 300px;
}

.explore-msg {
  display: flex;
}
.explore-msg--student { justify-content: flex-end; }
.explore-msg--tutor { justify-content: flex-start; }

.explore-bubble {
  max-width: 88%;
  padding: 8px 14px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.5;
}

.explore-bubble--student {
  background: #c47a1a;
  color: #fff;
  border-bottom-right-radius: 4px;
}

.explore-bubble--tutor {
  background: var(--color-surface-offset, #f5f5f5);
  color: var(--color-text, #333);
  border-bottom-left-radius: 4px;
}

.explore-bubble--tutor p { margin: 0 0 0.4em; }
.explore-bubble--tutor p:last-child { margin-bottom: 0; }

.explore-chat-input-area {
  padding-top: 8px;
  border-top: 1px solid var(--color-divider, #eee);
}

.explore-chat-form {
  display: flex;
  gap: 6px;
  align-items: flex-end;
}

.explore-chat-textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--color-divider, #ddd);
  border-radius: 10px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.88rem;
  line-height: 1.4;
  background: var(--color-surface, #fff);
  transition: border-color 0.2s;
}
.explore-chat-textarea:focus {
  outline: none;
  border-color: #c47a1a;
}

.explore-chat-send {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: #c47a1a;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.15s;
}
.explore-chat-send:hover { opacity: 0.85; }
.explore-chat-send:disabled { opacity: 0.4; cursor: default; }
.explore-chat-send svg { width: 14px; height: 14px; }

.explore-typing-dots {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}
.explore-typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c47a1a;
  opacity: 0.4;
  animation: explore-dot-pulse 1.4s infinite ease-in-out both;
}
.explore-typing-dots span:nth-child(2) { animation-delay: 0.16s; }
.explore-typing-dots span:nth-child(3) { animation-delay: 0.32s; }

@keyframes explore-dot-pulse {
  0%, 80%, 100% { opacity: 0.2; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  .explore-domain-chip { background: rgba(224, 160, 64, 0.15); color: #e0a040; }
  .explore-problem { background: rgba(255,255,255,0.04); border-left-color: #e0a040; }
  .explore-section { border-color: rgba(255,255,255,0.08); background: rgba(255,255,255,0.03); }
  .explore-slider-value { color: #e0a040; }
  .explore-slider { accent-color: #e0a040; }
  .explore-equation--active { background: rgba(224, 160, 64, 0.1); border-left-color: #e0a040; }
  .explore-bubble--student { background: #e0a040; }
  .explore-bubble--tutor { background: rgba(255,255,255,0.06); }
  .explore-chat-send { background: #e0a040; }
  .explore-typing-dots span { background: #e0a040; }
}