/* Piano Note Frequency Finder 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;
}

/* Toggle options */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  margin-bottom: var(--space-xs);
}
.toggle-label input {
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Piano section */
.piano-section {
  margin-bottom: var(--space-md);
}
.piano-scroll-container {
  overflow-x: auto;
  overflow-y: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: var(--space-md) var(--space-sm) var(--space-sm);
  -webkit-overflow-scrolling: touch;
}
.piano-scroll-container::-webkit-scrollbar {
  height: 8px;
}
.piano-scroll-container::-webkit-scrollbar-track {
  background: var(--color-bg);
  border-radius: 4px;
}
.piano-scroll-container::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
.piano-scroll-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}
.piano-keyboard {
  position: relative;
  height: 160px;
  min-width: 2120px; /* 52 white keys * ~40px + some padding */
  user-select: none;
}
.piano-key {
  position: absolute;
  cursor: pointer;
  border: 1px solid #333;
  transition: background 0.1s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  box-sizing: border-box;
}
.piano-key--white {
  background: linear-gradient(to bottom, #f8f8f8, #e8e8e8);
  width: 40px;
  height: 100%;
  z-index: 1;
  border-radius: 0 0 4px 4px;
  color: #555;
  font-size: 9px;
}
.piano-key--white:hover {
  background: linear-gradient(to bottom, #e0ffe8, #d0f0d8);
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.3);
}
.piano-key--white.active,
.piano-key--white.selected {
  background: linear-gradient(to bottom, #00ff41, #00cc33);
  box-shadow: 0 0 15px rgba(0, 255, 65, 0.5);
  color: #000;
}
.piano-key--black {
  background: linear-gradient(to bottom, #222, #111);
  width: 26px;
  height: 62%;
  z-index: 2;
  border-radius: 0 0 3px 3px;
  color: #888;
  font-size: 7px;
}
.piano-key--black:hover {
  background: linear-gradient(to bottom, #1a3a1a, #0d2a0d);
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.3);
}
.piano-key--black.active,
.piano-key--black.selected {
  background: linear-gradient(to bottom, #009922, #006611);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.5);
  color: #fff;
}
.piano-key .key-label {
  pointer-events: none;
  line-height: 1.1;
  text-align: center;
}
.piano-key .key-hz {
  pointer-events: none;
  font-size: 7px;
  opacity: 0.7;
  line-height: 1;
  margin-top: 1px;
}
.piano-keyboard.hide-labels .key-label,
.piano-keyboard.hide-labels .key-hz {
  display: none;
}
.piano-keyboard.hide-hz .key-hz {
  display: none;
}
.piano-scroll-hint {
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  display: none;
}

/* Tooltip */
.piano-tooltip {
  position: fixed;
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  pointer-events: none;
  z-index: 100;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  display: none;
}

/* Selected note info panel */
.note-info-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  min-height: 80px;
}
.note-info-placeholder {
  text-align: center;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: var(--space-md) 0;
}
.note-info-main {
  text-align: center;
  margin-bottom: var(--space-md);
}
.note-info-name {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}
.note-info-freq {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--color-secondary);
  margin-top: var(--space-xs);
}
.note-info-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}
.note-detail {
  text-align: center;
  padding: var(--space-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.detail-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.detail-value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  color: var(--color-text);
  font-weight: 600;
}
.note-info-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

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

/* Panel title */
.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);
  max-height: 600px;
  overflow-y: auto;
}
.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 tbody tr {
  cursor: pointer;
  transition: background 0.15s;
}
.data-table tr:hover td {
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}
.data-table tr.search-match td {
  background: color-mix(in srgb, var(--color-secondary) 15%, transparent);
}

/* Octave color coding for piano range */
.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; }

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); }

/* 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:nth-child(2) {
  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 .piano-section,
body.print-mode .note-info-panel,
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,
body.print-mode .piano-tooltip {
  display: none !important;
}
body.print-mode .table-wrap {
  max-height: none;
  overflow: visible;
}
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,
  .piano-section, .note-info-panel, .action-btns, .play-btn,
  .copy-row-btn, .footer, .back-to-top, .skip-link, #how-to-use,
  #faq, .formula-section, .related-grid, .hamburger, .related-card,
  .piano-tooltip {
    display: none !important;
  }
  .table-wrap {
    max-height: none !important;
    overflow: visible !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;
  }
  .note-info-details {
    grid-template-columns: repeat(2, 1fr);
  }
  .piano-keyboard {
    height: 130px;
  }
  .piano-key--white {
    width: 34px;
  }
  .piano-key--black {
    width: 22px;
  }
  .piano-scroll-hint {
    display: block;
  }
  .data-table {
    font-size: 11px;
  }
  .data-table th, .data-table td {
    padding: 4px 6px;
  }
}

@media (max-width: 480px) {
  .piano-keyboard {
    height: 100px;
  }
  .piano-key--white {
    width: 30px;
  }
  .piano-key--black {
    width: 18px;
  }
  .piano-key {
    font-size: 6px;
  }
  .note-info-details {
    grid-template-columns: 1fr 1fr;
  }
  .note-info-name {
    font-size: 2rem;
  }
  .note-info-freq {
    font-size: 1rem;
  }
  .action-btns {
    flex-direction: column;
    align-items: stretch;
  }
}