/* ============================================================
   Chord Finder — Styles
   FrequencyDetector.com
   ============================================================ */

/* Mode Tabs */
.mode-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.mode-tab {
  flex: 1;
  padding: 12px var(--space-md);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.mode-tab:hover {
  background: rgba(0, 255, 65, 0.05);
  color: var(--color-text);
}

.mode-tab--active {
  background: rgba(0, 255, 65, 0.12);
  color: var(--color-primary);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

/* Mode Panels */
.mode-panel {
  margin-bottom: var(--space-md);
}

/* Manual Mode Instructions */
.manual-instructions {
  text-align: center;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-sm);
}

/* Piano Keyboard */
.piano-wrap {
  overflow-x: auto;
  padding: var(--space-sm) 0;
  margin-bottom: var(--space-sm);
}

.piano-keyboard {
  display: flex;
  position: relative;
  height: 160px;
  min-width: 560px;
  margin: 0 auto;
  max-width: 700px;
}

.piano-key {
  position: relative;
  cursor: pointer;
  transition: background 0.1s, box-shadow 0.1s;
  user-select: none;
  -webkit-user-select: none;
}

.piano-key--white {
  flex: 1;
  height: 100%;
  background: linear-gradient(180deg, #f0f0f0 0%, #ffffff 15%, #e8e8e8 100%);
  border: 1px solid #999;
  border-radius: 0 0 5px 5px;
  z-index: 1;
  min-width: 28px;
}

.piano-key--white:hover {
  background: linear-gradient(180deg, #e0ffe4 0%, #f0fff2 15%, #d8f5dc 100%);
}

.piano-key--white.piano-key--selected {
  background: linear-gradient(180deg, #00cc33 0%, #00ff41 15%, #00dd38 100%);
  box-shadow: 0 0 16px rgba(0, 255, 65, 0.6), inset 0 -4px 8px rgba(0, 0, 0, 0.15);
  border-color: #00aa2a;
}

.piano-key--black {
  width: 22px;
  height: 60%;
  background: linear-gradient(180deg, #333 0%, #1a1a1a 100%);
  border: 1px solid #000;
  border-radius: 0 0 4px 4px;
  margin-left: -11px;
  margin-right: -11px;
  z-index: 2;
}

.piano-key--black:hover {
  background: linear-gradient(180deg, #444 0%, #2a2a2a 100%);
}

.piano-key--black.piano-key--selected {
  background: linear-gradient(180deg, #00aa33 0%, #008828 100%);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.5);
  border-color: #006619;
}

.piano-key__label {
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 9px;
  color: #666;
  pointer-events: none;
  white-space: nowrap;
}

.piano-key--selected .piano-key__label {
  color: #003300;
  font-weight: 700;
}

/* Selected notes display */
.selected-notes-display {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.selected-notes-text {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  font-weight: 700;
  flex: 1;
  letter-spacing: 0.05em;
}

/* Chord Result Section */
.chord-result-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  margin-bottom: var(--space-md);
}

.chord-result-main {
  margin-bottom: var(--space-md);
}

/* Big Chord Name */
.chord-name-display {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  margin-bottom: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(0, 255, 65, 0.02);
  transition: border-color 0.3s, background 0.3s;
}

.chord-name-display--match {
  border-color: var(--color-primary);
  background: rgba(0, 255, 65, 0.06);
}

.chord-name-big {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(0, 255, 65, 0.4), 0 0 60px rgba(0, 255, 65, 0.15);
}

.chord-quality-label {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--color-secondary);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* Chord Details Grid */
.chord-details-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.chord-detail-card {
  text-align: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0, 255, 65, 0.02);
}

.chord-detail-card__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.chord-detail-card__value {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-primary);
}

/* Chord Info Rows */
.chord-info-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.chord-info-row__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
  min-width: 80px;
}

.chord-info-row__value {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text);
}

/* Diagram Section */
.diagram-section {
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
}

/* Guitar Diagram */
.guitar-diagram-wrap {
  display: flex;
  justify-content: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.3);
}

.guitar-diagram-wrap canvas {
  max-width: 100%;
  height: auto;
}

/* Piano Diagram */
.piano-diagram-wrap {
  display: flex;
  justify-content: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.3);
}

.piano-diagram-wrap canvas {
  max-width: 100%;
  height: auto;
}

/* Play Chord Row */
.play-chord-row {
  display: flex;
  justify-content: center;
  margin-top: var(--space-md);
}

/* Alternate Voicings */
.alternate-voicings-section {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.alt-voicings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
}

.alt-voicing-card {
  text-align: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.3);
}

.alt-voicing-card__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

/* Detected Tones List (shared with multi-tone) */
.detected-tones-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  background: var(--color-surface);
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: var(--space-sm);
}

.tones-placeholder {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  padding: var(--space-md);
}

.tone-item {
  display: grid;
  grid-template-columns: 80px 60px 1fr 50px;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px var(--space-xs);
  border-radius: var(--radius-sm);
  background: rgba(0, 255, 65, 0.03);
  border: 1px solid rgba(0, 255, 65, 0.08);
}

.tone-item:first-child {
  border-color: var(--color-primary);
  background: rgba(0, 255, 65, 0.06);
}

.tone-item__note {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-secondary);
}

.tone-item__freq {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  font-weight: 700;
}

.tone-item__bar-wrap {
  position: relative;
  height: 14px;
  background: rgba(0, 255, 65, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.tone-item__bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  opacity: 0.6;
  transition: width 0.1s;
}

.tone-item__db {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  text-align: right;
}

/* File Drop Zone */
.file-drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  margin-top: var(--space-sm);
  transition: border-color 0.2s, background 0.2s;
}

.file-drop-zone--hover {
  border-color: var(--color-primary);
  background: rgba(0, 255, 65, 0.05);
}

.file-drop-zone__text {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}

/* Session Stats */
.session-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.session-stat {
  text-align: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.session-stat__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;
}

.session-stat__value {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-primary);
}

/* Controls Grid */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.control-group {
  display: flex;
  flex-direction: column;
}

.control-group__label {
  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;
}

.control-group__value {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-primary);
}

.control-row {
  display: flex;
  align-items: center;
}

/* Freeze Badge */
.badge-freeze {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-secondary);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  animation: freezePulse 1.5s ease-in-out infinite;
}

@keyframes freezePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* File upload button */
.file-upload-btn {
  cursor: pointer;
}

/* Export Actions */
.export-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

/* Small button variant */
.btn--sm {
  padding: 6px 12px;
  font-size: var(--fs-xs);
}

/* Keyboard Hints */
.kbd-hints {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Responsive */
@media (max-width: 768px) {
  .chord-name-big {
    font-size: 3rem;
  }

  .chord-details-grid {
    grid-template-columns: 1fr;
  }

  .piano-keyboard {
    min-width: 480px;
    height: 130px;
  }

  .piano-key--black {
    width: 18px;
    margin-left: -9px;
    margin-right: -9px;
  }

  .tone-item {
    grid-template-columns: 70px 50px 1fr 40px;
  }

  .controls-grid {
    grid-template-columns: 1fr;
  }

  .session-stats {
    grid-template-columns: 1fr;
  }

  .mode-tabs {
    font-size: var(--fs-xs);
  }

  .alt-voicings-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .chord-name-big {
    font-size: 2.5rem;
  }

  .piano-keyboard {
    min-width: 400px;
    height: 110px;
  }

  .chord-info-row {
    flex-direction: column;
    gap: 2px;
  }
}