/* Demo Section */
.demo-section {
  margin-bottom: 3rem;
}

.demo-invite {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  overflow: hidden;
  margin-bottom: 0;
}

.demo-invite-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 50% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 30% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  pointer-events: none;
  animation: demo-glow-drift 8s ease-in-out infinite;
}

@keyframes demo-glow-drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(3%, -3%); }
}

.demo-invite-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.demo-invite-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}

.demo-invite:hover .demo-invite-icon {
  transform: scale(1.05);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.4);
}

.demo-invite-icon svg {
  width: 26px;
  height: 26px;
  color: white;
  margin-left: 2px;
}

.demo-invite-title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.demo-invite-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 320px;
}

.demo-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  border: none;
  border-radius: 100px;
  color: white;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
}

.demo-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.45);
}

.demo-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.4), 0 8px 25px rgba(59, 130, 246, 0.45);
}

.demo-toggle:active {
  transform: translateY(0);
}

.demo-toggle.active {
  background: var(--bg-tertiary);
  box-shadow: none;
}

.demo-toggle.active:hover {
  background: var(--border-hover);
  transform: none;
}

.demo-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s;
}

.demo-toggle.active svg {
  transform: rotate(180deg);
}

.demo-container {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, margin 0.4s ease-out;
  margin-top: 0;
}

.demo-container.open {
  max-height: 2000px;
  margin-top: 1rem;
}

.demo-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.5rem 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.demo-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 0%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 100%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.demo-label {
  display: block;
  text-align: center;
  font-size: 0.6875rem;
  color: #8b8b95;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0;
}

/* Config Display - Compact header */
.config-display {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
}

@media (min-width: 500px) {
  .config-display {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Dashboard Grid Layout */
.demo-dashboard {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Desktop: Three-column dashboard */
@media (min-width: 768px) {
  .demo-section {
    position: relative;
    left: 0;
    width: 100%;
    padding: 0;
    box-sizing: border-box;
    transition: left 0.4s ease-out, width 0.4s ease-out, margin 0.4s ease-out, padding 0.4s ease-out;
  }

  /* Expand to full width when demo is open */
  .demo-section.expanded {
    width: 100vw;
    left: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    padding: 0 2rem;
  }

  .demo-wrapper {
    max-width: none;
  }

  .demo-dashboard {
    display: grid;
    grid-template-columns: 200px 1fr 240px;
    gap: 1.5rem;
    align-items: stretch;
  }
}

/* Left Panel: Controls */
.dashboard-controls {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 10px;
  order: 1;
}

@media (min-width: 768px) {
  .dashboard-controls {
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding: 1rem;
    order: 0;
  }
}

/* Center: Strings - takes most space */
.dashboard-strings {
  flex: 1;
  min-width: 0;
  order: 0;
}

@media (min-width: 768px) {
  .dashboard-strings {
    order: 1;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    padding: 1rem;
  }

  .dashboard-strings .strings-display {
    max-width: 500px;
    margin: 0 auto;
  }
}

/* Right Panel: Chord Info */
.dashboard-chords {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 10px;
  order: 2;
}

@media (min-width: 768px) {
  .dashboard-chords {
    padding: 1rem;
    justify-content: flex-start;
  }
}

/* Compact Chord Display */
.chord-display-compact {
  text-align: center;
  padding: 0.5rem;
}

.chord-display-compact .chord-name {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.3));
}

.chord-display-compact .chord-alt {
  font-size: 0.875rem;
  color: var(--pro-purple);
}

.chord-display-compact .chord-notes {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Compact Tone Legend */
.tone-legend-compact {
  display: none;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 6px;
}

.tone-legend-compact.show {
  display: flex;
}

.tone-legend-compact .tone-legend-item {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.625rem;
  color: var(--text-muted);
}

/* Compact Chord Palette */
.chord-palette-compact {
  padding: 0.5rem;
}

.chord-palette-compact .chord-palette-label {
  font-size: 0.625rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  text-align: center;
}

.chord-palette-compact .chord-palette-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  justify-content: center;
}

.chord-palette-compact .chord-btn {
  padding: 0.3rem 0.5rem;
  font-size: 0.75rem;
}

/* Lock button at top of chord panel */
.dashboard-chords .lock-chord-container {
  justify-content: center;
  padding: 0.25rem 0;
}

.dashboard-chords .lock-chord-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.6875rem;
}

/* Compact Toggle */
.toggle-label-compact {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.625rem;
  color: var(--text-muted);
  justify-content: center;
}

.toggle-label-compact .toggle-slider {
  width: 28px;
  height: 16px;
}

.toggle-label-compact .toggle-slider::before {
  width: 12px;
  height: 12px;
}

.toggle-label-compact .toggle-input:checked + .toggle-slider::before {
  transform: translateX(12px);
}

.config-item {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.config-label {
  font-size: 0.625rem;
  color: #9898a3;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.config-select {
  padding: 0.5rem 0.75rem;
  background: linear-gradient(180deg, var(--bg-tertiary) 0%, #1f1f23 100%);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: not-allowed;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}