/* Equal Temperament Frequency Chart Styles */

/* Controls row */
.controls-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 0.8fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}
.control-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}
.input-label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  font-family: var(--font-mono);
}
.input-field {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  padding: var(--space-xs) var(--space-sm);
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.input-field:focus {
  outline: none;
  border-color: var(--color-primary);
}
.input-with-unit {
  display: flex;
  gap: var(--space-xs);
}
.input-with-unit .input-field {
  flex: 1;
}
.unit-badge {
  display: flex;
  align-items: center;
  padding: 0 var(--space-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}
.slider-wrap {
  margin-top: var(--space-xs);
}
.slider {
  width: 100%;
  accent-color: var(--color-primary);
  cursor: pointer;
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-top: 2px;
}
.a4-display {
  margin-top: var(--space-xs);
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-primary);
  text-align: center;
}

/* Search */
.search-wrap {
  position: relative;
}
.search-wrap .input-field {
  padding-right: 2.5rem;
}
.search-clear-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  display: none;
}
.search-clear-btn.visible {
  display: block;
}
.search-clear-btn:hover {
  color: var(--color-primary);
}
.search-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-top: 4px;
  min-height: 1.2em;
}

/* Sort buttons */
.sort-btns {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.sort-btn {
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}
.sort-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.sort-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}

/* Octave filter */
.octave-filter {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.octave-filter-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.octave-cb {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.octave-cb input {
  accent-color: var(--color-primary);
  cursor: pointer;
}
.oct-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.octave-toggle-btn {
  padding: 2px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  transition: all 0.2s;
}
.octave-toggle-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Octave color coding */
.oct-0, tr.octave-0 td:first-child { color: #8888aa; }
.oct-1, tr.octave-1 td:first-child { color: #9b59b6; }
.oct-2, tr.octave-2 td:first-child { color: #3498db; }
.oct-3, tr.octave-3 td:first-child { color: #1abc9c; }
.oct-4, tr.octave-4 td:first-child { color: #00ff41; }
.oct-5, tr.octave-5 td:first-child { color: #f1c40f; }
.oct-6, tr.octave-6 td:first-child { color: #e67e22; }
.oct-7, tr.octave-7 td:first-child { color: #e74c3c; }
.oct-8, tr.octave-8 td:first-child { color: #ff6b9d; }
.oct-9, tr.octave-9 td:first-child { color: #c0c0c0; }

tr.octave-0 { background: rgba(136,136,170,0.03); }
tr.octave-1 { background: rgba(155,89,182,0.03); }
tr.octave-2 { background: rgba(52,152,219,0.03); }
tr.octave-3 { background: rgba(26,188,156,0.03); }
tr.octave-4 { background: rgba(0,255,65,0.04); }
tr.octave-5 { background: rgba(241,196,15,0.03); }
tr.octave-6 { background: rgba(230,126,34,0.03); }
tr.octave-7 { background: rgba(231,76,60,0.03); }
tr.octave-8 { background: rgba(255,107,157,0.03); }
tr.octave-9 { background: rgba(192,192,192,0.03); }

/* Piano keyboard */
.piano-section {
  margin-bottom: var(--space-md);
}
.piano-keyboard {
  display: flex;
  position: relative;
  height: 120px;
  max-width: 800px;
  margin: 0 auto;
  user-select: none;
}
.piano-key {
  position: relative;
  cursor: pointer;
  border: 1px solid #333;
  transition: background 0.1s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 9px;
}
.piano-key--white {
  background: linear-gradient(to bottom, #f8f8f8, #e8e8e8);
  flex: 1;
  height: 100%;
  z-index: 1;
  border-radius: 0 0 4px 4px;
  color: #333;
}
.piano-key--white:hover {
  background: linear-gradient(to bottom, #e0ffe8, #d0f0d8);
}
.piano-key--white.active {
  background: linear-gradient(to bottom, #00ff41, #00cc33);
}
.piano-key--black {
  background: linear-gradient(to bottom, #222, #111);
  width: 28px;
  height: 70%;
  position: absolute;
  z-index: 2;
  border-radius: 0 0 3px 3px;
  color: #888;
  font-size: 8px;
}
.piano-key--black:hover {
  background: linear-gradient(to bottom, #1a3a1a, #0d2a0d);
}
.piano-key--black.active {
  background: linear-gradient(to bottom, #009922, #006611);
  color: #fff;
}

/* Action buttons */
.action-btns {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-lg);
}

/* Panel title reuse */
.panel-title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Table */
.freq-table-section {
  margin-top: var(--space-md);
}
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}
.data-table thead {
  position: sticky;
  top: 0;
  z-index: 10;
}
.data-table th {
  background: var(--color-surface);
  color: var(--color-primary);
  padding: var(--space-xs) var(--space-sm);
  text-align: left;
  border-bottom: 2px solid var(--color-border);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.data-table th.sortable {
  cursor: pointer;
  user-select: none;
}
.data-table th.sortable:hover {
  color: var(--color-secondary);
}
.data-table th.sort-asc::after {
  content: ' \2191';
}
.data-table th.sort-desc::after {
  content: ' \2193';
}
.data-table td {
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 50%, transparent);
  color: var(--color-text);
  white-space: nowrap;
}
.data-table tr:hover td {
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}
.data-table tr.hidden-row {
  display: none;
}
.data-table tr.search-match td {
  background: color-mix(in srgb, var(--color-secondary) 15%, transparent);
}

/* Playing row glow */
.data-table tr.playing td {
  background: color-mix(in srgb, var(--color-primary) 15%, transparent);
  box-shadow: inset 0 0 20px color-mix(in srgb, var(--color-primary) 10%, transparent);
}
@keyframes playGlow {
  0%, 100% { box-shadow: inset 0 0 10px color-mix(in srgb, var(--color-primary) 10%, transparent); }
  50% { box-shadow: inset 0 0 25px color-mix(in srgb, var(--color-primary) 20%, transparent); }
}
.data-table tr.playing td:first-child {
  animation: playGlow 1s ease-in-out infinite;
}

/* Sharp notes styling */
tr.sharp-note td:first-child {
  font-size: var(--fs-xs);
}

/* Play / Copy buttons in table */
.play-btn, .copy-row-btn {
  padding: 3px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  transition: all 0.2s;
}
.play-btn:hover, .copy-row-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.play-btn.playing-btn {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 15%, transparent);
}

/* Formula */
.formula-section {
  margin-top: var(--space-xl);
}
.formula-explainer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-md) 0;
}
.formula-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.fc-title {
  font-size: var(--fs-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.fc-formula {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--color-secondary);
  margin: var(--space-xs) 0;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}
.fc-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Content */
.content-section h2 {
  color: var(--color-primary);
  font-family: var(--font-display);
  margin-bottom: var(--space-md);
}
.content-section h3 {
  color: var(--color-secondary);
  margin: var(--space-lg) 0 var(--space-sm);
}
.content-list {
  padding-left: var(--space-lg);
  line-height: 1.8;
}
.content-list li {
  margin-bottom: var(--space-sm);
}

/* Related tools grid */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 700px;
  margin: 0 auto;
}
.related-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s;
}
.related-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.related-icon {
  font-size: 2rem;
}
.related-name {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
  text-align: center;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}
.faq-question {
  padding: var(--space-md);
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: '+';
  color: var(--color-primary);
  font-size: 1.2em;
}
details[open] .faq-question::after {
  content: '\2212';
}
.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
}

/* Print styles */
body.print-mode .header,
body.print-mode .mobile-menu,
body.print-mode .breadcrumb,
body.print-mode .controls-row,
body.print-mode .octave-filter,
body.print-mode .piano-section,
body.print-mode .action-btns,
body.print-mode .play-btn,
body.print-mode .copy-row-btn,
body.print-mode .footer,
body.print-mode .back-to-top,
body.print-mode .skip-link,
body.print-mode #how-to-use,
body.print-mode #faq,
body.print-mode .formula-section,
body.print-mode .related-grid,
body.print-mode .hamburger {
  display: none !important;
}
body.print-mode .data-table th,
body.print-mode .data-table td {
  color: #000 !important;
  background: #fff !important;
  border-color: #ccc !important;
}
body.print-mode .data-table tr:nth-child(even) td {
  background: #f5f5f5 !important;
}

@media print {
  .header, .mobile-menu, .breadcrumb, .controls-row, .octave-filter,
  .piano-section, .action-btns, .play-btn, .copy-row-btn, .footer,
  .back-to-top, .skip-link, #how-to-use, #faq, .formula-section,
  .related-grid, .hamburger, .related-card {
    display: none !important;
  }
  body, .page-wrapper {
    background: #fff !important;
    color: #000 !important;
  }
  .data-table th, .data-table td {
    color: #000 !important;
    background: #fff !important;
    border-color: #ccc !important;
    font-size: 10px !important;
    padding: 2px 6px !important;
  }
  .data-table tr:nth-child(even) td {
    background: #f5f5f5 !important;
  }
  .data-table thead {
    position: static;
  }
  h1, h2 {
    color: #000 !important;
    font-size: 16px !important;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .controls-row {
    grid-template-columns: 1fr !important;
  }
  .formula-explainer {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .sort-btns {
    flex-direction: row;
  }
  .piano-keyboard {
    height: 90px;
  }
  .piano-key--black {
    width: 22px;
  }
  .data-table {
    font-size: 11px;
  }
  .data-table th, .data-table td {
    padding: 4px 6px;
  }
}

@media (max-width: 480px) {
  .piano-keyboard {
    height: 70px;
  }
  .piano-key--black {
    width: 18px;
  }
  .piano-key {
    font-size: 7px;
  }
  .action-btns {
    flex-direction: column;
    align-items: stretch;
  }
}