/* ---- Unified-app scene integration -------------------------------------
   #keyboard-app is shown only while the Keyboard scene is active; SceneManager
   toggles body.keyboard-active (the scene's bodyClass). #home hosts the p5
   canvas full-screen behind the chord panel and navigation menu. */
#keyboard-app { display: none; }
body.keyboard-active #keyboard-app { display: block; }
#keyboard-app #home { position: fixed; inset: 0; z-index: 0; }
/* Shared ADSR (adsr.js) host, toggled from the menu's "Audio Settings" item. */
#keyboard-audio-gui { position: fixed; top: 10px; left: 10px; z-index: 130; }

#home canvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}

body.keyboard-active #home canvas {
  opacity: 1;
}

.keyboard-note {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  max-width: 90vw;
  text-align: center;
  font-family: 'Fira Code', monospace;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary, #666);
  background: rgba(246, 246, 246, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border, #e0e0e0);
  border-radius: 20px;
  padding: 14px 36px 12px 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  z-index: 105;
}
.keyboard-note-close {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid #ccc;
  border-radius: 50%;
  background: rgb(248, 248, 248);
  color: #1f1f1f;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}
.keyboard-note-close:hover {
  background: #ffbc1f;
}
.keyboard-note-title {
  margin-bottom: 6px;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary, #1f1f1f);
}
.keyboard-note-subtitle {
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text-secondary, #666);
}
.keyboard-note-cta {
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary, #666);
}
.keyboard-note-title a,
.keyboard-note-cta a {
  display: inline-block;
  color: var(--accent, #ff7300);
  background: rgba(246, 246, 246, 0.9);
  border: 1px solid var(--accent, #ff7300);
  border-radius: 20px;
  padding: 3px 12px;
  margin-left: 4px;
  font-size: 0.82rem;
  text-decoration: none;
  pointer-events: auto;
  transition: background 0.2s ease, color 0.2s ease;
}
.keyboard-note-title a:hover,
.keyboard-note-cta a:hover {
  background: var(--accent, #ff7300);
  color: #fff;
}
.keyboard-note-hints {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary, #888);
}
.keyboard-note-hints strong {
  color: var(--text-primary, #1f1f1f);
  font-weight: 500;
  margin-right: 4px;
}
body.keyboard-active .keyboard-note {
  opacity: 1;
  pointer-events: auto;
}
body.note-dismissed .keyboard-note {
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Info reopen button (bottom-left) shown when note is dismissed */
.keyboard-note-reopen {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 106;
  background: rgba(246, 246, 246, 0.9);
  backdrop-filter: blur(8px);
  color: var(--text-primary, #1f1f1f);
  border: 1px solid var(--border, #e0e0e0);
  border-radius: 20px;
  padding: 6px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, background 0.2s ease;
}
.keyboard-note-reopen:hover {
  background: rgba(255, 255, 255, 1);
}
body.keyboard-active.note-dismissed .keyboard-note-reopen {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 480px) {
  .keyboard-note {
    font-size: 0.8rem;
    bottom: 12px;
    padding: 12px 30px 10px 14px;
  }
  .keyboard-note-title {
    font-size: 0.9rem;
  }
  .keyboard-note-subtitle,
  .keyboard-note-cta {
    font-size: 0.78rem;
  }
  .keyboard-note-hints {
    font-size: 0.72rem;
    gap: 4px 10px;
  }
  .keyboard-note-reopen {
    font-size: 0.75rem;
    padding: 5px 12px;
  }
}
#audio-gui {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 110;
  transition: opacity 0.5s ease;
}
#audio-gui.hidden {
  display: none;
}
.nav-audio-btn {
  background: none;
  color: var(--text-secondary, #666);
  border: none;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 400;
  padding: 0;
  cursor: pointer;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.3s;
}
.nav-audio-btn:hover {
  color: var(--accent, #ff7300);
}
/* Hide audio buttons when scrolled away from hero */
.nav-audio-btn.nav-hidden {
  display: none;
}
#chord-panel {
  /* Master size for chord buttons and grid labels — tweak to test. */
  --chord-font-size: 16px;
  position: fixed;
  top: 55px;
  right: 0;
  bottom: 0;
  width: min(820px, 95vw);
  z-index: 120;
  background: rgba(246, 246, 246, 0.97);
  backdrop-filter: blur(20px);
  border-left: 1px solid var(--border, #e0e0e0);
  padding: 20px;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.35s ease;
}
#chord-panel.visible {
  transform: translateX(0);
}
#chord-panel-header {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#chord-panel-close {
  background: rgb(231, 231, 231);
  border: 1px solid #ccc;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  color: #1f1f1f;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
#chord-panel-close:hover {
  background: rgb(202, 202, 202);
}
#chord-triads {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  margin-bottom: 6px;
  flex: 1;
}
#chord-sus {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
}
.ext-section {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ext-label {
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  color: #555;
  white-space: nowrap;
  min-width: 52px;
}
#chord-9ths, #chord-11ths,
#chord-mode, #chord-fundamental {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.chord-btn {
  background: #eaeaea;
  color: #1f1f1f;
  border: 1px solid #ffffff;
  font-family: 'Fira Code', monospace;
  font-size: var(--chord-font-size, 15px);
  padding: 8px 8px;
  border-radius: 8px;
  cursor: pointer;
  min-width: 52px;
  text-align: center;
}
.chord-btn:hover {
  background: #ffc853;
  color: #fff;
}
.chord-btn.selected {
  background: #ffaa00;
  color: #fff;
  border-color: #ffffff;
}
.chord-btn:disabled,
.chord-btn.disabled {
  background: #f3f3f3;
  color: #b0b0b0;
  cursor: not-allowed;
}
.chord-btn:disabled:hover,
.chord-btn.disabled:hover {
  background: #f3f3f3;
  color: #b0b0b0;
}
#chord-grid {
  border-collapse: separate;
  border-spacing: 2px;
  table-layout: fixed;
  width: 100%;
}
#chord-grid th, #chord-grid td {
  padding: 5;
}
#chord-grid th {
  color: #343434;
  font-size: var(--chord-font-size, 15px);
  font-weight: 400;
  padding: 3px 5px;
  text-align: center;
}
#chord-grid thead th:first-child {
  width: 36px;
}
#chord-grid tbody th {
  text-align: right;
  padding-right: 8px;
  font-size: var(--chord-font-size, 15px);
}
#chord-grid td button {
  width: 100%;
  background: #eaeaea;
  color: #1f1f1f;
  border: 1px solid #ffffff;
  font-family: 'Fira Code', monospace;
  font-size: var(--chord-font-size, 15px);
  cursor: pointer;
  border-radius: 8px;
  padding: 8px 4px;
  text-align: center;
  white-space: nowrap;
  box-sizing: border-box;
}
#chord-grid td button:hover {
  background: #ffc853;
  color: #fff;
}
#chord-grid td button.selected {
  background: #ffaa00;
  color: #fff;
  border-color: #ffffff;
}

/* --- Mobile / small screens --- */
@media (max-width: 768px) {
  #chord-panel {
    width: 100%;
    padding: 16px 12px;
    font-size: 10px;
  }
  #chord-triads {
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
  }
  .chord-btn {
    font-size: 9px;
    padding: 3px 4px;
    min-width: 0;
  }
  #chord-grid {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-spacing: 1px;
  }
  #chord-grid td button {
    font-size: 9px;
    min-width: 44px;
    padding: 3px 4px;
  }
  #chord-grid th {
    font-size: 9px;
    padding: 2px 3px;
  }
  #chord-grid tbody th {
    padding-right: 4px;
    font-size: 9px;
  }
  .ext-label {
    font-size: 9px;
    min-width: 40px;
  }
  #audio-gui {
    top: 5px;
    left: 5px;
  }
}

@media (max-width: 480px) {
  #chord-triads {
    grid-template-columns: repeat(3, 1fr);
  }
  .chord-btn {
    font-size: 8px;
    padding: 3px 2px;
  }
  #chord-grid td button {
    font-size: 8px;
    min-width: 38px;
    padding: 3px 2px;
  }
  #chord-grid th, #chord-grid tbody th {
    font-size: 8px;
  }
}