:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --compare-accent: #f59e0b;
  --compare-accent-soft: rgba(245, 158, 11, 0.24);
  --border: #334155;
  --radius: 8px;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  padding: 0 20px 40px;
}

header {
  text-align: center;
  padding: 24px 0 8px;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header .subtitle {
  display: block;
  margin-top: 2px;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* Controls */
#controls {
  max-width: 800px;
  margin: 0 auto;
  padding: 12px 0;
}

.global-controls-shell {
  border: 1px solid #2f4f75;
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.12), rgba(30, 41, 59, 0.7));
  padding: 9px 10px 6px;
  margin-bottom: 12px;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.12);
}

.global-controls-title {
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #93c5fd;
  margin-bottom: 8px;
}

.control-row-global {
  margin-bottom: 0;
}

.control-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
}

.control-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

.control-group select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 10px;
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  cursor: pointer;
  outline: none;
}

.control-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.control-group select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.scale-type-selector {
  min-width: 170px;
}

.context-toggle {
  padding: 7px 16px;
}

#context-mode-panel {
  display: none;
  max-width: 1120px;
  margin: 0 auto 12px;
  padding: 10px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.context-mode-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Scale Finder Panel */
#scale-finder-panel {
  margin: 0 auto 12px;
  max-width: 800px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}

.scale-finder-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.scale-finder-status {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  min-height: 1.5em;
}

.scale-finder-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.scale-finder-btn {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.scale-finder-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
}

.scale-finder-btn.primary:hover {
  background: var(--accent-hover);
}

.scale-finder-btn.secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--text-muted);
}

.scale-finder-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 300px;
  overflow-y: auto;
}

.scale-finder-result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  color: var(--text-primary);
  transition: all 0.2s;
}

.scale-finder-result:hover {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
}

.scale-finder-result-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.scale-finder-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.scale-finder-percentage {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
}

.scale-finder-details {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.mode-context-cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mode-context-guide,
.mode-context-row {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 10px;
  align-items: center;
}

.mode-context-guide {
  padding: 7px 10px;
  border: 1px dashed #334155;
  border-radius: 6px;
  background: #1b273d;
}

.mode-context-row {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  text-align: left;
  color: var(--text-primary);
  transition: border-color 0.15s, transform 0.15s;
  font-family: 'Inter', sans-serif;
  width: 100%;
}

.mode-context-row:hover {
  border-color: var(--accent);
  transform: translateY(-0.5px);
}

.mode-context-row.active {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.12);
}

.mode-row-meta {
  min-width: 0;
}

.mode-row-head {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mode-row-sub {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.mode-row-diagram {
  overflow: hidden;
  padding-bottom: 2px;
}

.mode-interval-lane {
  --note-w: 34px;
  --interval-w: 20px;
  --shift-step: calc(var(--note-w) + var(--interval-w));
  display: flex;
  align-items: flex-end;
  width: max-content;
  margin-left: calc(var(--shift) * var(--shift-step));
  padding: 2px 0;
}

.mode-note-cell {
  width: var(--note-w);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  color: #cbd5e1;
  position: relative;
  padding-top: 16px;
}

.mode-note-cell::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 50%;
  transform: translateX(-50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #64748b;
}

.mode-note-cell.tonic {
  color: #7dd3fc;
}

.mode-note-cell.tonic::before {
  background: #38bdf8;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}

.mode-interval-cell {
  width: var(--interval-w);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  color: var(--text-muted);
  position: relative;
  padding-top: 0;
  margin-bottom: 2px;
}

.mode-interval-cell::before {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 12px;
  border-top: 2px solid var(--step-color, #64748b);
  opacity: 0.75;
}

.mode-interval-cell.whole {
  --step-color: #38bdf8;
  color: #7dd3fc;
}

.mode-interval-cell.half {
  --step-color: #f59e0b;
  color: #fbbf24;
}

@media (max-width: 980px) {
  .mode-context-guide,
  .mode-context-row {
    grid-template-columns: 1fr;
  }

  .mode-row-head {
    white-space: normal;
  }
}

/* Label toggle */
.label-toggle-group {
  display: flex;
  gap: 0;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.label-toggle {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: none;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: 'Inter', sans-serif;
}

.label-toggle.active {
  background: var(--accent);
  color: #fff;
}

.label-toggle:hover:not(.active) {
  background: #475569;
}

/* Toggle section */
.toggle-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Pentatonic toggle */
.overlay-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 14px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: 'Inter', sans-serif;
}

.overlay-toggle .toggle-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  font-size: 11px;
  color: transparent;
  transition: all 0.15s;
  border: 1px solid var(--border);
}

.overlay-toggle.active {
  border-color: #f59e0b;
  color: var(--text-primary);
}

.overlay-toggle.active .toggle-check {
  background: #f59e0b;
  color: #000;
  border-color: #f59e0b;
}

.overlay-toggle:hover {
  border-color: #f59e0b80;
}

.overlay-toggle.caged.active {
  border-color: #8b5cf6;
}

.overlay-toggle.caged.active .toggle-check {
  background: #8b5cf6;
  border-color: #8b5cf6;
}

.overlay-toggle.caged:hover {
  border-color: #8b5cf680;
}

/* Degree toggles */
.degree-toggles {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
}

.toggles-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

.degree-buttons {
  display: flex;
  gap: 4px;
}

.degree-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.degree-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--deg-color, #64748b);
  opacity: 0.5;
  transition: all 0.15s;
}

.degree-btn:hover {
  border-color: var(--deg-color, #64748b);
  color: var(--text-primary);
}

.degree-btn.active {
  background: var(--deg-color, #3b82f6);
  border-color: var(--deg-color, #3b82f6);
  color: #fff;
  box-shadow: 0 0 12px color-mix(in srgb, var(--deg-color) 40%, transparent);
}

.degree-btn.active::after {
  opacity: 0;
}

/* Fretboard */
#fretboard-container {
  padding: 20px 0;
  overflow-x: auto;
}

#spread-action-row {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 9px;
  margin: -4px auto 8px;
}

.spread-open-btn {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 2px solid var(--compare-accent);
  background: rgba(245, 158, 11, 0.12);
  color: #fde68a;
  font-size: 1.2rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.spread-open-btn:hover {
  background: rgba(245, 158, 11, 0.24);
  transform: translateY(-1px);
}

.spread-open-btn.spread-enabled {
  background: var(--compare-accent);
  color: #111827;
}

.spread-open-btn.spread-enabled:hover {
  background: #fbbf24;
}

.spread-open-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.spread-action-label {
  font-family: 'JetBrains Mono', monospace;
  color: #fbbf24;
  font-size: 0.75rem;
}

#spread-board-section {
  display: none;
  max-width: 1100px;
  margin: 0 auto 10px;
  padding: 11px 12px 12px;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--compare-accent-soft);
  border-radius: var(--radius);
  box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.08);
}

.spread-board-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.spread-board-title {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #fbbf24;
}

.spread-board-source {
  margin-top: 2px;
  font-size: 0.8rem;
  color: #fdba74;
  font-family: 'JetBrains Mono', monospace;
}

.spread-board-close {
  border: 1px solid var(--compare-accent-soft);
  background: rgba(15, 23, 42, 0.7);
  border-radius: 5px;
  color: #fbbf24;
  padding: 4px 10px;
  font-size: 0.72rem;
  cursor: pointer;
}

.spread-board-close:hover {
  border-color: var(--compare-accent);
  color: #fde68a;
}

.spread-toggle-section {
  margin-top: 8px;
}

.spread-degree-toggles {
  border-color: var(--compare-accent-soft);
}

#spread-fretboard-container {
  padding: 12px 0 3px;
  overflow-x: auto;
}

.fretboard-svg {
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,0.4));
}

/* Info panel */
#info-panel {
  text-align: center;
  padding: 6px;
  min-height: 28px;
}

#note-info {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Advanced section */
#advanced-section {
  max-width: 1100px;
  margin: 20px auto 0;
}

#advanced-section summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

#advanced-section summary::before {
  content: '▸';
  transition: transform 0.15s;
}

#advanced-section[open] summary::before {
  transform: rotate(90deg);
}

#advanced-section summary:hover {
  color: var(--text-secondary);
  border-color: var(--accent);
}

#chord-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 0;
}

/* Voicings panel */
#voicings-panel {
  display: none;
}

.voicings-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  padding-left: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.voicings-grid {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.mini-chord {
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}

.voicing-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.voicing-group-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  text-align: center;
  white-space: nowrap;
}

.mini-chord:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.mini-chord.selected {
  border-color: #facc15;
  background: rgba(250, 204, 21, 0.08);
  box-shadow: 0 0 12px rgba(250, 204, 21, 0.15);
}

.range-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
}

/* Theory Panel */
#theory-panel {
  display: flex;
  justify-content: center;
  gap: 24px;
  max-width: 900px;
  margin: 12px auto 0;
  flex-wrap: wrap;
}

#diatonic-section,
#circle-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

#diatonic-section {
  flex: 1;
  min-width: 280px;
}

#circle-section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* Diatonic Chord Chips */
#diatonic-chords {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.diatonic-empty {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.chord-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: 'JetBrains Mono', monospace;
  min-width: 56px;
}

.chord-chip:hover {
  border-color: var(--accent);
  background: #1e3a5f;
}

.chord-chip.active {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.12);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.15);
}

.chord-numeral {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 600;
}

.chord-chip.active .chord-numeral {
  color: #fbbf24;
}

.chord-symbol {
  font-size: 0.78rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Perspective info */
#perspective-info {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 6px;
  font-size: 0.78rem;
  color: #fbbf24;
  font-family: 'JetBrains Mono', monospace;
}

.reset-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  padding: 3px 10px;
  font-size: 0.72rem;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: all 0.15s;
}

.reset-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Circle of Fifths */
.cof-svg {
  width: 280px;
  height: 280px;
}

.cof-svg circle[data-cof-note]:hover {
  filter: brightness(1.3);
}

.cof-svg circle[data-cof-note] {
  transition: filter 0.1s;
}

/* Feedback reminder banner */
.feedback-banner {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100vw - 24px);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.88);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.28);
  color: #cbd5e1;
  z-index: 1100;
}

.feedback-banner[hidden] {
  display: none;
}

.feedback-banner-text {
  font-size: 0.72rem;
  line-height: 1.2;
  white-space: nowrap;
}

.feedback-banner-open {
  border: 1px solid rgba(148, 163, 184, 0.45);
  border-radius: 999px;
  padding: 3px 10px;
  background: rgba(59, 130, 246, 0.16);
  color: #bfdbfe;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.feedback-banner-open:hover {
  border-color: rgba(96, 165, 250, 0.8);
  background: rgba(59, 130, 246, 0.28);
}

/* Feedback popup */
.feedback-popup-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(26, 28, 34, 0.78);
  backdrop-filter: blur(1.5px);
  z-index: 1200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.feedback-popup-backdrop[hidden] {
  display: none !important;
}

.feedback-popup-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

.feedback-popup {
  width: min(100%, 720px);
  min-height: 390px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: #dedee3;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feedback-no-thanks {
  align-self: flex-end;
  margin: 16px 18px 0 0;
  border: none;
  background: transparent;
  color: #4f46b8;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
}

.feedback-no-thanks:hover {
  text-decoration: underline;
}

.feedback-popup-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  text-align: center;
  padding: 22px 36px 18px;
}

.feedback-popup-content h2 {
  color: #312f9f;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  line-height: 1.08;
  font-weight: 700;
  text-wrap: balance;
}

.feedback-popup-hint {
  min-height: 1.6em;
  color: #373777;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.feedback-popup-hint.visible {
  opacity: 1;
}

.feedback-popup-hint.error {
  color: #9f1239;
}

.feedback-popup-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.6);
}

.feedback-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-left: 1px solid rgba(0, 0, 0, 0.08);
  padding: 16px 10px;
  background: transparent;
  color: #312f9f;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: clamp(0.85rem, 1.3vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.feedback-action:first-child {
  border-left: none;
}

.feedback-action-icon {
  width: 0.95em;
  height: 0.95em;
  flex-shrink: 0;
}

.feedback-action:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

.feedback-action:active {
  transform: translateY(1px);
}

/* Collaborate guestbook */
.collab-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(26, 28, 34, 0.78);
  backdrop-filter: blur(1.5px);
  z-index: 1250;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.collab-backdrop[hidden] {
  display: none !important;
}

.collab-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

.collab-modal {
  width: min(100%, 640px);
  max-height: min(84vh, 780px);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: #dedee3;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  padding: 22px 26px 20px;
}

.collab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.collab-header h2 {
  color: #312f9f;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
}

.collab-close {
  border: none;
  background: transparent;
  color: #4f46b8;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  padding: 4px 8px;
}

.collab-close:hover {
  color: #312f9f;
}

.collab-subtitle {
  margin-top: 4px;
  color: #373777;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.collab-list {
  flex: 1;
  min-height: 120px;
  overflow-y: auto;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}

.collab-empty {
  color: #373777;
  font-size: 0.88rem;
  padding: 18px 0;
  text-align: center;
}

.collab-empty.error {
  color: #9f1239;
}

.collab-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.55);
}

.collab-votes {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.collab-vote {
  border: none;
  background: transparent;
  color: #7c7cb8;
  font-size: 0.8rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
}

.collab-vote:hover {
  color: #312f9f;
}

.collab-vote.active {
  color: #312f9f;
}

.collab-vote-down.active {
  color: #9f1239;
}

.collab-score {
  color: #312f9f;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 700;
}

.collab-item-body {
  min-width: 0;
}

.collab-item-text {
  color: #26264f;
  font-size: 0.9rem;
  line-height: 1.4;
  overflow-wrap: break-word;
}

.collab-item-author {
  display: block;
  margin-top: 3px;
  color: #6b6ba3;
  font-size: 0.78rem;
  font-style: italic;
}

.collab-form {
  margin-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.6);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.collab-text {
  width: 100%;
  resize: vertical;
  border: 1px solid rgba(79, 70, 184, 0.3);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: #26264f;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  line-height: 1.4;
  padding: 10px 12px;
}

.collab-text:focus {
  outline: 2px solid rgba(79, 70, 184, 0.5);
  outline-offset: -1px;
}

.collab-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.collab-form-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.collab-author {
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(79, 70, 184, 0.3);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: #26264f;
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  padding: 7px 10px;
}

.collab-counter {
  color: #6b6ba3;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  flex-shrink: 0;
}

.collab-submit {
  border: none;
  border-radius: 8px;
  background: #312f9f;
  color: #eef;
  font-family: 'Saira Condensed', 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 8px 20px;
  cursor: pointer;
  flex-shrink: 0;
}

.collab-submit:hover {
  filter: brightness(1.15);
}

.collab-submit:disabled {
  opacity: 0.6;
  cursor: default;
}

.collab-form-hint {
  min-height: 1.3em;
  color: #373777;
  font-size: 0.8rem;
}

.collab-form-hint.error {
  color: #9f1239;
}

.spread-prompt-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1200;
  padding: 12px;
  background: rgba(2, 6, 23, 0.72);
}

.spread-prompt-card {
  width: min(430px, 100%);
  border-radius: 10px;
  border: 1px solid var(--compare-accent-soft);
  background: #111f36;
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.45);
  padding: 14px 15px 15px;
}

.spread-prompt-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fbbf24;
}

.spread-prompt-copy {
  margin-top: 7px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  line-height: 1.4;
}

.spread-prompt-actions {
  margin-top: 13px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.spread-prompt-btn {
  border-radius: 5px;
  font-size: 0.78rem;
  font-family: 'Inter', sans-serif;
  padding: 6px 12px;
  border: 1px solid var(--border);
  cursor: pointer;
}

.spread-prompt-btn.secondary {
  background: #1e293b;
  color: var(--text-secondary);
}

.spread-prompt-btn.secondary:hover {
  border-color: #64748b;
  color: var(--text-primary);
}

.spread-prompt-btn.primary {
  background: rgba(245, 158, 11, 0.12);
  color: #fde68a;
  border-color: var(--compare-accent-soft);
}

.spread-prompt-btn.primary:hover {
  border-color: var(--compare-accent);
  background: rgba(245, 158, 11, 0.2);
}

@media (max-width: 700px) {
  .feedback-banner {
    top: 6px;
    width: calc(100vw - 16px);
    max-width: none;
    justify-content: space-between;
    padding: 6px 8px;
  }

  .feedback-banner-text {
    font-size: 0.68rem;
    white-space: normal;
  }

  .feedback-banner-open {
    flex-shrink: 0;
    font-size: 0.66rem;
    padding: 3px 8px;
  }

  .feedback-popup {
    min-height: 330px;
    border-radius: 10px;
  }

  .feedback-popup-content {
    padding: 16px 18px 14px;
  }

  .feedback-popup-actions {
    grid-template-columns: 1fr;
  }

  .feedback-action {
    padding: 14px 12px;
    border-left: none;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
  }

  .feedback-action:first-child {
    border-top: none;
  }

  .collab-modal {
    border-radius: 10px;
    padding: 16px 16px 14px;
    max-height: 90vh;
  }

  .collab-form-row {
    flex-wrap: wrap;
  }
}