/* Modern, Clean Minimalist Light Mode Styling for Fretboard & Circle */

:root {
  --bg-color: #FAF8F5;
  --card-bg: #FFFFFF;
  --text-color: #2B2B2B;
  --text-muted: #6C6861;
  --border-color: #E9E5DF;
  --border-active: #A26950;
  --accent-color: #A26950;
  --accent-light: #F6F1EA;
  --accent-hover: #8F5941;
  --accent-gold: #D4A373;
  --accent-gold-light: #FAF2E8;
  
  --fretboard-wood: #EBDCCB;
  --fretboard-nut: #E0CEBA;
  --fret-wire: #B8AF9E;
  
  --font-serif: 'Lora', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  
  --shadow-sm: 0 2px 8px rgba(43, 43, 43, 0.03);
  --shadow-md: 0 8px 24px rgba(162, 105, 80, 0.06);
  --shadow-lg: 0 16px 36px rgba(162, 105, 80, 0.1);
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Page Layout */
.app-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
}

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2.5rem;
  text-align: center;
}

h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-style: italic;
  margin-bottom: 1.5rem;
}

/* Tabs Navigation */
.tabs-nav {
  display: flex;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.35rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.tab-btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 0.6rem 1.6rem;
  border-radius: 40px;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--text-color);
}

.tab-btn.active {
  background-color: var(--accent-light);
  color: var(--accent-color);
  font-weight: 600;
}

/* Master Volume Control */
.global-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1.2rem;
  border-radius: 30px;
  box-shadow: var(--shadow-sm);
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.volume-control input[type="range"] {
  width: 80px;
  accent-color: var(--accent-color);
  cursor: pointer;
}

/* Main Views */
.view-panel {
  display: none;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.view-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Fretboard Section Styles */
.fretboard-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2rem;
}

@media (max-width: 960px) {
  .fretboard-layout {
    grid-template-columns: 1fr;
  }
}

/* Sidebar & Control Panels */
.control-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card h2 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* Root Note Selectors */
.note-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.note-btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  aspect-ratio: 1;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.note-btn:hover {
  background-color: var(--bg-color);
  border-color: var(--accent-gold);
}

.note-btn.active {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(162, 105, 80, 0.2);
}

/* Flavor Buttons */
.flavor-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.flavor-btn {
  font-family: var(--font-sans);
  text-align: left;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--card-bg);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flavor-btn:hover {
  background-color: var(--bg-color);
}

.flavor-btn.active {
  background-color: var(--accent-light);
  border-color: var(--border-active);
  color: var(--accent-color);
  font-weight: 600;
}

.flavor-btn .chord-suffix {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.flavor-btn.active .chord-suffix {
  color: var(--accent-color);
}

/* Voicing Selections */
.voicing-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.voicing-item {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background-color: var(--card-bg);
}

.voicing-item:hover {
  background-color: var(--bg-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.voicing-item.active {
  border-color: var(--accent-color);
  background-color: var(--accent-gold-light);
  box-shadow: var(--shadow-sm);
}

.voicing-title {
  font-weight: 600;
  color: var(--text-color);
}

.voicing-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Right Content Display */
.main-display {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Fretboard Visualizer Display */
.fretboard-card {
  padding: 1.5rem;
}

.fretboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.chord-info-title h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
}

.chord-info-title p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.play-chord-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--accent-color);
  color: #FFFFFF;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(162, 105, 80, 0.2);
  transition: var(--transition);
}

.play-chord-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(162, 105, 80, 0.3);
}

.play-chord-btn:active {
  transform: translateY(0);
}

.fretboard-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: 12px;
  background-color: #FAF8F5;
  border: 1px solid var(--border-color);
  padding: 1.5rem 0.5rem;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.02);
}

.fretboard-svg {
  display: block;
  min-width: 800px;
  height: 180px;
  margin: 0 auto;
}

/* SVG Interactive Styles */
.fretboard-wood-rect {
  fill: var(--fretboard-wood);
}
.fretboard-nut-rect {
  fill: var(--fretboard-nut);
}
.fret-line {
  stroke: var(--fret-wire);
  stroke-width: 1.5;
}
.fret-marker {
  fill: #FFFFFF;
  opacity: 0.65;
  stroke: var(--fret-wire);
  stroke-width: 1;
}
.string-line {
  stroke: #8C8475;
  stroke-linecap: round;
  transition: stroke 0.2s;
}
.string-line:hover {
  stroke: var(--accent-color);
  stroke-width: calc(inherit + 1px);
  cursor: pointer;
}
.string-label {
  font-size: 11px;
  font-weight: 700;
  fill: var(--text-muted);
  alignment-baseline: middle;
  text-anchor: middle;
}

/* Fingering markers */
.fret-dot-group {
  cursor: pointer;
  transition: var(--transition);
}
.fret-dot-circle {
  fill: var(--accent-color);
  stroke: #FFFFFF;
  stroke-width: 1.5;
  transition: var(--transition);
}
.fret-dot-circle.root {
  fill: var(--text-color);
  stroke: var(--accent-gold);
  stroke-width: 2.5;
}
.fret-dot-text {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  fill: #FFFFFF;
  text-anchor: middle;
  dominant-baseline: central;
}
.fret-dot-text.root {
  fill: var(--accent-gold);
}

/* Fret string label overlays (top nut status indicators: play/muted) */
.string-nut-indicator {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: bold;
  text-anchor: middle;
}
.string-nut-indicator.muted {
  fill: #C96A6A;
}
.string-nut-indicator.open {
  fill: #61A375;
}

/* Interactive Fretboard note trigger overlays */
.fret-trigger-rect {
  fill: transparent;
  cursor: pointer;
}
.fret-trigger-rect:hover {
  fill: rgba(162, 105, 80, 0.08);
}

/* Fret numbering markers under the fretboard */
.fret-num-text {
  font-size: 10px;
  fill: var(--text-muted);
  text-anchor: middle;
}

/* Chord Details Box */
.chord-details-card {
  padding: 1.5rem;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.detail-item {
  background-color: var(--bg-color);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

.detail-item-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.detail-item-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-color);
}

.detail-item-value.chord-formula {
  font-family: monospace;
}

/* Circle of Fifths Section Styles */
.circle-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 960px) {
  .circle-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.circle-visual-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.circle-svg-wrapper {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
}

.circle-svg {
  width: 100%;
  height: 100%;
}

/* Circle design tokens */
.circle-rim {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 1;
}

.circle-divider {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 1;
}

.circle-sector {
  cursor: pointer;
  transition: fill 0.2s, stroke 0.2s;
}

.circle-sector.major {
  fill: #FFFFFF;
  stroke: var(--border-color);
  stroke-width: 1;
}

.circle-sector.minor {
  fill: #e6d7c3;
  stroke: var(--border-color);
  stroke-width: 1;
}

.circle-sector:hover {
  fill: var(--accent-light) !important;
}

.circle-sector.active {
  fill: var(--accent-gold-light) !important;
  stroke: var(--accent-color) !important;
  stroke-width: 2.5px !important;
}

.circle-text {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  fill: var(--text-color);
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none; /* Let clicks pass to the path below */
  user-select: none;
}

.circle-text.minor {
  font-size: 11px;
  font-weight: 500;
  fill: var(--text-muted);
}

.circle-sector.active + .circle-text {
  fill: var(--accent-color);
  font-weight: 700;
}

/* Circle Control Controls Panel */
.circle-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.toggle-group {
  display: flex;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 0.2rem;
}

.toggle-btn {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  background: none;
  border: none;
  padding: 0.4rem 1rem;
  border-radius: 15px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-muted);
}

.toggle-btn.active {
  background-color: #FFFFFF;
  color: var(--text-color);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* Circle Info Panel */
.circle-info-card {
  padding: 2rem;
  height: 100%;
}

.key-signature-banner {
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent-color);
  padding: 1rem;
  border-radius: 0 12px 12px 0;
  margin-bottom: 1.5rem;
}

.key-signature-banner h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--accent-color);
  margin-bottom: 0.25rem;
}

.key-signature-banner p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.diatonic-section h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.diatonic-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
  background: transparent;
}

.diatonic-table th {
  text-align: left;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.6rem 0.8rem;
  font-weight: 600;
  border: none;
}

.diatonic-table td {
  padding: 0.8rem;
  font-size: 0.88rem;
  vertical-align: middle;
  white-space: nowrap;
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.diatonic-table td:first-child {
  border-left: 1px solid var(--border-color);
  border-radius: 10px 0 0 10px;
}

.diatonic-table td:last-child {
  border-right: 1px solid var(--border-color);
  border-radius: 0 10px 10px 0;
}

.diatonic-row {
  cursor: default;
  transition: var(--transition);
}

.diatonic-row:hover td {
  background-color: var(--accent-light);
}

.diatonic-degree {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--accent-color);
}

.diatonic-chord-name {
  font-weight: 600;
}

/* Footer Section */
footer {
  margin-top: 4rem;
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--font-serif);
  font-style: italic;
}

.kofi-container {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.kofi-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background-color: var(--accent-light);
  border: 1px solid var(--border-color);
  color: var(--accent-color);
  padding: 0.6rem 1.4rem;
  border-radius: 50px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  font-style: normal; /* Override footer's italic style */
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.kofi-btn:hover {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(162, 105, 80, 0.15);
}

.kofi-btn:active {
  transform: translateY(0);
}

.kofi-icon {
  font-size: 1.1rem;
}


/* Sub-tabs Navigation inside Chord Explorer */
.subtabs-nav {
  display: flex;
  gap: 1.5rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1.5rem;
  padding-bottom: 0px;
}

.subtab-btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 0.6rem 0.5rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.subtab-btn:hover {
  color: var(--text-color);
}

.subtab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  font-weight: 600;
}

/* Subtab Panels */
.subtab-panel {
  display: none;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.subtab-panel.active {
  display: block;
}

/* Voicings Comparison Grid */
.voicings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.voicing-card {
  width: 100%;
  box-sizing: border-box;
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.voicing-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

.voicing-card.active {
  background-color: var(--accent-light);
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

.voicing-card h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.4rem;
}

.voicing-card-details {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  margin-top: 0.4rem;
}

.mini-fretboard-svg {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 200 / 55;
  display: block;
  pointer-events: none; /* Make clicks register on the card container */
  margin: 0.5rem 0;
  border-radius: 6px;
  background-color: #FAF8F5;
  border: 1px solid var(--border-color);
}

/* Diatonic Table Select and Play Controls */
.diatonic-select {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--card-bg);
  color: var(--text-color);
  cursor: pointer;
  outline: none;
  transition: var(--transition);
}

.diatonic-select:hover {
  border-color: var(--accent-color);
}

.diatonic-play-btn {
  background: none;
  border: none;
  color: var(--accent-color);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.diatonic-play-btn:hover {
  background-color: var(--accent-light);
  color: var(--accent-hover);
}

.diatonic-play-btn svg {
  display: block;
}

/* Mobile Responsive Styling (max-width: 768px) */
@media (max-width: 768px) {
  .note-btn {
    aspect-ratio: auto;
    height: 38px;
    font-size: 0.85rem;
  }

  .note-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }
  
  .flavor-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  
  .flavor-list > button:last-child {
    grid-column: span 2;
  }

  .card {
    padding: 1rem;
  }

  header {
    width: 100%;
    align-items: center;
  }

  .tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
  }

  .tabs-nav {
    max-width: 100%;
  }

  .global-controls {
    padding: 0.4rem 1rem;
  }

  .subtabs-nav {
    justify-content: center;
    gap: 1rem;
  }

  .kofi-btn {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    max-width: 100%;
    box-sizing: border-box;
  }

  .kofi-text {
    white-space: normal;
    text-align: left;
  }

  .diatonic-table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}