/* Piano Stretch Tuning Calculator Styles */

/* Controls row */
.controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}
.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;
}

/* Piano type selector */
.piano-type-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}
.type-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;
  white-space: nowrap;
}
.type-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.type-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}
.type-desc {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  min-height: 2.5em;
}

/* Stretch display */
.stretch-display {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-xs);
}
.stretch-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-top: 4px;
  text-align: center;
}

/* Railsback Curve Canvas */
.curve-section {
  margin-bottom: var(--space-lg);
}
.canvas-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  overflow: hidden;
}
#railsback-canvas {
  width: 100%;
  height: auto;
  display: block;
  cursor: crosshair;
}
.curve-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}
.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.legend-swatch {
  display: inline-block;
  width: 16px;
  height: 3px;
  border-radius: 2px;
}

/* 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;
}

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

/* 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 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);
}

/* Cents offset coloring */
.cents-positive {
  color: #f39c12;
}
.cents-negative {
  color: #3498db;
}
.cents-zero {
  color: var(--color-text-muted);
}

/* A/B comparison buttons */
.ab-btn-group {
  display: flex;
  gap: 4px;
}
.ab-btn {
  padding: 2px 8px;
  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;
  white-space: nowrap;
}
.ab-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.ab-btn.playing-btn {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 15%, transparent);
}
.ab-btn--tet {
  /* 12-TET button accent */
}
.ab-btn--stretched {
  /* Stretched button accent */
}

/* Playing row glow */
.data-table tr.playing td {
  background: color-mix(in srgb, var(--color-primary) 15%, 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;
}

/* Highlight A4 row */
.data-table tr.key-a4 td {
  background: color-mix(in srgb, var(--color-primary) 6%, transparent);
  font-weight: 600;
}

/* Formula section */
.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);
}

/* Canvas tooltip */
.canvas-tooltip {
  position: absolute;
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text);
  pointer-events: none;
  z-index: 20;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.15s;
}
.canvas-tooltip.visible {
  opacity: 1;
}

/* Print styles */
body.print-mode .header,
body.print-mode .mobile-menu,
body.print-mode .breadcrumb,
body.print-mode .controls-row,
body.print-mode .curve-section,
body.print-mode .action-btns,
body.print-mode .ab-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 .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, .curve-section,
  .action-btns, .ab-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;
  }
  .table-wrap {
    max-height: none !important;
    overflow: visible !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;
  }
  .piano-type-selector {
    grid-template-columns: 1fr 1fr;
  }
  .data-table {
    font-size: 11px;
  }
  .data-table th, .data-table td {
    padding: 4px 6px;
  }
  .curve-legend {
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
  }
}

@media (max-width: 480px) {
  .piano-type-selector {
    grid-template-columns: 1fr;
  }
  .action-btns {
    flex-direction: column;
    align-items: stretch;
  }
  .ab-btn-group {
    flex-direction: column;
  }
}