/* ===================================
   CSS CUSTOM PROPERTIES - THEME SYSTEM
   =================================== */

:root {
  /* Spacing */
  --spacing-xs: 0.15rem;
  --spacing-sm: 0.25rem;
  --spacing-md: 0.5rem;
  --spacing-lg: 0.75rem;
  --spacing-xl: 1rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);

  /* Z-index layers */
  --z-base: 1;
  --z-dropdown: 100;
  --z-overlay: 500;
  --z-modal: 1000;
  --z-tooltip: 2000;
}

/* Theme: Dark (Default) */
[data-theme="dark"] {
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #2a2a2a;
  --color-bg-tertiary: #3a3a3a;
  --color-bg-overlay: rgba(0, 0, 0, 0.8);

  --color-text-primary: #ffffff;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #808080;

  --color-accent: #00bcd4;
  --color-accent-hover: #00acc1;
  --color-accent-active: #0097a7;

  --color-success: #4caf50;
  --color-warning: #ff9800;
  --color-danger: #f44336;

  --color-border: #404040;
  --color-border-light: #505050;
}

/* Theme: Green on Black */
[data-theme="matrix"] {
  --color-bg-primary: #000000;
  --color-bg-secondary: #0a0a0a;
  --color-bg-tertiary: #1a1a1a;
  --color-bg-overlay: rgba(0, 0, 0, 0.9);

  --color-text-primary: #00ff00;
  --color-text-secondary: #00cc00;
  --color-text-muted: #008800;

  --color-accent: #00ff00;
  --color-accent-hover: #00ff41;
  --color-accent-active: #00cc00;

  --color-success: #00ff00;
  --color-warning: #88ff00;
  --color-danger: #ff4400;

  --color-border: #003300;
  --color-border-light: #005500;
}

/* Theme: Bold & Vivid */
[data-theme="vivid"] {
  --color-bg-primary: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #21262d;
  --color-bg-overlay: rgba(13, 17, 23, 0.85);

  --color-text-primary: #ffffff;
  --color-text-secondary: #c9d1d9;
  --color-text-muted: #8b949e;

  --color-accent: #ff007a;
  --color-accent-hover: #ff3393;
  --color-accent-active: #cc0062;

  --color-success: #00d9ff;
  --color-warning: #ffd700;
  --color-danger: #ff4444;

  --color-border: #30363d;
  --color-border-light: #484f58;
}

/* Theme: Spectrum (Multi-color sections) */
[data-theme="spectrum"] {
  --color-bg-primary: #000000;
  --color-bg-secondary: #0a0a0a;
  --color-bg-tertiary: #1a1a1a;
  --color-bg-overlay: rgba(0, 0, 0, 0.9);

  --color-text-primary: #ffffff;
  --color-text-secondary: #cccccc;
  --color-text-muted: #888888;

  /* Default accent (green for sequencer) */
  --color-accent: #00ff00;
  --color-accent-hover: #00ff41;
  --color-accent-active: #00cc00;

  /* Section-specific colors */
  --color-presets: #00d9ff;        /* Cyan */
  --color-presets-hover: #33e0ff;
  --color-presets-border: #006080;

  --color-effects: #ff9500;        /* Orange */
  --color-effects-hover: #ffaa33;
  --color-effects-border: #804a00;

  --color-sequencer: #00ff00;      /* Green */
  --color-sequencer-hover: #00ff41;
  --color-sequencer-border: #008000;

  --color-looppedal: #ff00ff;      /* Magenta */
  --color-looppedal-hover: #ff33ff;
  --color-looppedal-border: #800080;

  --color-success: #00ff00;
  --color-warning: #ff9500;
  --color-danger: #ff0055;

  --color-border: #222222;
  --color-border-light: #333333;
}

/* Spectrum theme section overrides */
[data-theme="spectrum"] .presets {
  border-color: var(--color-presets-border);
}

[data-theme="spectrum"] .presets__title {
  color: var(--color-presets);
}

[data-theme="spectrum"] .preset-btn:hover,
[data-theme="spectrum"] .preset-btn.is-active {
  border-color: var(--color-presets);
}

[data-theme="spectrum"] .preset-btn:hover .preset-btn__name,
[data-theme="spectrum"] .preset-btn.is-active .preset-btn__name {
  color: var(--color-presets);
}

[data-theme="spectrum"] .audio-filters {
  border-color: var(--color-effects-border);
}

[data-theme="spectrum"] .audio-filters__title {
  color: var(--color-effects);
}

[data-theme="spectrum"] .effect-module__title {
  color: var(--color-effects);
}

[data-theme="spectrum"] .toggle__slider:before {
  background: var(--color-effects);
}

[data-theme="spectrum"] .sequencer {
  border-color: var(--color-sequencer-border);
}

[data-theme="spectrum"] .sequencer__title {
  color: var(--color-sequencer);
}

[data-theme="spectrum"] .pattern-selector__chain-label {
  color: var(--color-sequencer);
}

[data-theme="spectrum"] .loop-pedal {
  border-color: var(--color-looppedal-border);
}

[data-theme="spectrum"] .loop-pedal__title {
  color: var(--color-looppedal);
}

[data-theme="spectrum"] .loop-track__title {
  color: var(--color-looppedal);
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===================================
   APP LAYOUT
   =================================== */

.app {
  display: grid;
  grid-template-columns: minmax(117px, 0.65fr) minmax(162px, 1fr) minmax(500px, 3fr) minmax(200px, 1fr);
  grid-template-rows: auto 1fr auto auto; /* header, content, patterns, transport */
  width: 100%;
  height: 100%;
  background: var(--color-bg-primary);
  gap: 0;
}

.header {
  grid-column: 1 / -1;
  grid-row: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-bottom: 2px solid var(--color-border);
}

.header__title {
  font-size: clamp(1rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--color-accent);
}

.header__right {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.main {
  display: contents; /* Children participate in parent .app grid */
}

/* Ultra-wide layout: Presets | Audio Effects | Drum Sequencer | Loop Pedal */

.transport {
  grid-column: 1 / 3; /* Only span presets and audio effects columns */
  grid-row: 4;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border-top: 2px solid var(--color-border);
  gap: var(--spacing-md);
  margin: var(--spacing-md);
  margin-top: 0;
  border-radius: var(--radius-lg);
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-width: 44px;
  min-height: 30px;
}

.btn:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-primary);
  font-weight: 600;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--primary:active {
  background: var(--color-accent-active);
  border-color: var(--color-accent-active);
}

.btn--secondary {
  background: var(--color-bg-tertiary);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--icon {
  padding: var(--spacing-sm);
  font-size: 1.2rem;
}

.btn--transport {
  font-size: 1.5rem;
  padding: var(--spacing-md);
  min-width: 40px;
  min-height: 40px;
}

.btn--play.is-playing .icon--play {
  display: none;
}

.btn--play.is-playing .icon--pause {
  display: inline;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===================================
   PRESETS PANEL
   =================================== */

.presets {
  grid-column: 1;
  grid-row: 2 / 4; /* Span content and patterns rows */
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-y: auto;
  border: 1px solid var(--color-border);
  margin: var(--spacing-md);
  margin-right: 0;
  margin-bottom: 0;
}

.presets__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.presets__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.preset-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0 var(--spacing-md);  
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: left;
  width: 100%;
  min-height: 10px;
}

.preset-btn__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.preset-btn__info {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.preset-btn:hover,
.preset-btn.is-active {
  background: var(--color-bg-primary);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

/* ===================================
   AUDIO EFFECTS
   =================================== */

.audio-filters {
  grid-column: 2;
  grid-row: 2; /* Only content row, patterns panel below */
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-y: auto;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  margin: var(--spacing-md);
  margin-right: 0;
  margin-bottom: 0;
}

.audio-filters__title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-sm);
  flex: 1;
}

.effect-module {
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color var(--transition-fast);
}

.effect-module:has(input[type="checkbox"]:checked) {
  border-color: var(--color-accent);
}

.effect-module__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.effect-module__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.effect-module__controls {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle__slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-primary);
  border: 2px solid var(--color-border);
  transition: all var(--transition-fast);
  border-radius: 24px;
}

.toggle__slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  border-radius: 50%;
}

.toggle input:checked + .toggle__slider {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.toggle input:checked + .toggle__slider:before {
  transform: translateX(20px);
  background-color: var(--color-bg-primary);
}

/* Compact Controls */
.control.control--compact {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 2px 4px;
  margin-bottom: 4px;
  align-items: center;
}

.control.control--compact .control__label {
  grid-column: 1 / -1;
  grid-row: 1;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  text-align: left;
  margin: 0;
}

.control.control--compact .control__slider {
  grid-column: 1;
  grid-row: 2;
  height: 4px;
  width: 100%;
  min-width: 60px;
  margin: 0;
}

.control.control--compact .control__value {
  grid-column: 2;
  grid-row: 2;
  font-size: 0.7rem;
  color: var(--color-text-primary);
  text-align: right;
  font-weight: 600;
  white-space: nowrap;
  margin: 0;
}

.control__select {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.control__select:hover {
  border-color: var(--color-accent);
}

.control__select:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* ===================================
   PATTERNS PANEL
   =================================== */

.patterns-panel {
  grid-column: 2;
  grid-row: 3; /* Below audio effects */
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  margin: var(--spacing-md);
  margin-right: 0;
  margin-bottom: 0;
}

.patterns-panel__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

/* Override pattern-selector styles when inside patterns-panel */
.patterns-panel .pattern-selector {
  margin-top: 0;
  padding: 0;
  background: transparent;
  border: none;
}

/* Spectrum theme colors for patterns panel */
[data-theme="spectrum"] .patterns-panel {
  border-color: var(--color-sequencer-border);
}

[data-theme="spectrum"] .patterns-panel__title {
  color: var(--color-sequencer);
}

/* ===================================
   SEQUENCER
   =================================== */

.sequencer {
  grid-column: 3;
  grid-row: 2 / 5; /* Span rows 2-4 for full height */
  display: flex;
  flex-direction: column;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin: var(--spacing-md);
}

.sequencer__header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.sequencer__title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sequencer__title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0;
}

.sequencer__controls {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-lg);
  align-items: flex-start;
  width: 50%;
  justify-content: flex-end;
}

.btn--small {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.sequencer__grid-container {
  display: grid;
  grid-template-columns: 255px 1fr; /* 80px label + 9*18px knobs + gaps */
  gap: var(--spacing-sm);
  flex: 1;
  min-height: 0;
  margin-bottom: var(--spacing-md);
}

.sequencer__track-names {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* Sticky header row for knob labels */
.track-header {
  display: grid;
  grid-template-columns: 80px repeat(9, 18px);
  gap: 1px;
  align-items: center;
  background: var(--color-bg-tertiary);
  border-bottom: 2px solid var(--color-accent);
  padding: 3px 2px;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-shrink: 0;
  height: 22px;
  box-sizing: border-box;
}

.track-header__name {
  font-size: 0.69rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  padding: 1px 2px;
}

.track-header__label {
  font-size: 0.55rem;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

/* Color-coded header labels matching knob colors */
.track-header__label--volume { color: #4caf50; }
.track-header__label--offset { color: #2196f3; }
.track-header__label--pan { color: #00bcd4; }
.track-header__label--pitch { color: #9c27b0; }
.track-header__label--attack { color: #ffeb3b; }
.track-header__label--decay { color: #ff9800; }
.track-header__label--length { color: #795548; }
.track-header__label--bass { color: #f44336; }
.track-header__label--treble { color: #e91e63; }

/* Track list container (no scroll to maintain canvas alignment) */
.track-names__scrollable {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.track-name {
  display: grid;
  grid-template-columns: 80px repeat(9, 18px);
  gap: 1px;
  align-items: center;
  background: var(--color-bg-tertiary);
  font-size: 0.81rem;
  font-weight: 500;
  line-height: 1.2;
  flex: 1 1 0;
  min-height: 18px;
  border-bottom: 1px solid var(--color-border);
  box-sizing: border-box;
  overflow: hidden;
  padding: 1px 2px;
}

.track-name__label {
  padding: 1px 2px;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.75rem;
}

.track-name:last-child {
  border-bottom: none;
}

.track-name--loop {
  background: var(--color-bg-secondary);
  color: #ffffff;
}

/* Editable sample track names */
.track-name__label--editable {
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-radius: var(--radius-sm);
  border-bottom: 1px dashed var(--color-border);
}

.track-name__label--editable:hover {
  color: var(--color-accent);
  background: rgba(0, 0, 0, 0.2);
  border-bottom-color: var(--color-accent);
}

/* Inline edit input for track names */
.track-name__input {
  width: 100%;
  padding: 0 2px;
  font-size: 0.55rem;
  font-weight: 500;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  outline: none;
}

.track-name__input:focus {
  box-shadow: 0 0 0 2px rgba(0, 188, 212, 0.3);
}

/* Changeable track name (drum instruments) */
.track-name__label--changeable {
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-radius: var(--radius-sm);
}

.track-name__label--changeable:hover {
  color: var(--color-accent);
  background: rgba(0, 0, 0, 0.2);
}

/* ===================================
   MIXER KNOBS (Per-Track Controls)
   =================================== */

/* Individual mixer knob container - scales with track height */
.mixer-knob {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: ns-resize;
  user-select: none;
  gap: 0px;
  padding: 0;
  box-sizing: border-box;
}

.mixer-knob__svg {
  /* Scale to fill container height, maintain square aspect */
  width: auto;
  height: 100%;
  aspect-ratio: 1;
  max-width: 100%;
  max-height: 52px; /* Cap maximum size (40px + 30%) */
  min-height: 13px; /* Minimum readable size (10px + 30%) */
}

.mixer-knob__bg {
  fill: var(--color-bg-primary);
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.mixer-knob__indicator {
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  transform-origin: center;
  transition: transform 0.05s linear;
}

.mixer-knob__label {
  display: none; /* Labels now in header row */
}

/* Knob color variants for distinguishing parameter types */
.mixer-knob--volume { color: #4caf50; }     /* Green - Volume */
.mixer-knob--offset { color: #2196f3; }     /* Blue - Timing Offset */
.mixer-knob--pan { color: #00bcd4; }        /* Cyan - Pan */
.mixer-knob--pitch { color: #9c27b0; }      /* Purple - Pitch */
.mixer-knob--attack { color: #ffeb3b; }     /* Yellow - Attack */
.mixer-knob--decay { color: #ff9800; }      /* Orange - Decay */
.mixer-knob--length { color: #795548; }     /* Brown - Length */
.mixer-knob--bass { color: #f44336; }       /* Red - Bass */
.mixer-knob--treble { color: #e91e63; }     /* Pink - Treble */

/* Hover effect for knobs */
.mixer-knob:hover .mixer-knob__bg {
  stroke: currentColor;
}

.mixer-knob:hover .mixer-knob__label {
  color: currentColor;
}

/* Legacy volume knob styles (kept for compatibility) */
.volume-knob-container {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: ns-resize;
  user-select: none;
}

.volume-knob {
  width: 20px;
  height: 20px;
}

.volume-knob__bg {
  fill: var(--color-bg-primary);
  stroke: var(--color-border);
  stroke-width: 2;
}

.volume-knob__indicator {
  stroke: var(--color-accent);
  stroke-width: 3;
  stroke-linecap: round;
  transform-origin: center;
  transition: transform 0.05s linear;
}

.sequencer__grid-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

/* Spacer to align canvas with track names (matches header height: 22px) */
.sequencer__grid-spacer {
  height: 22px;
  flex-shrink: 0;
  background: var(--color-bg-tertiary);
  border-bottom: 2px solid var(--color-accent);
  box-sizing: border-box;
}

.sequencer__canvas {
  display: block;
  width: 100%;
  flex: 1;
  min-height: 0;
  cursor: pointer;
}

.sequencer__visualization {
  height: 50px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.visualization__canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Pattern Selector */
.pattern-selector {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-top: var(--spacing-md);
}

.pattern-selector__chain {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding-right: var(--spacing-md);
  border-right: 1px solid var(--color-border);
}

.pattern-selector__chain-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
}

.pattern-selector__patterns {
  display: flex;
  gap: 3px;
  flex: 1;
  overflow-x: auto;
  padding: 2px;
}

.pattern-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.pattern-slot__button {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-primary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.pattern-slot__button:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-secondary);
}

.pattern-slot__button.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-primary);
}

.pattern-slot__button.is-queued {
  border-color: var(--color-warning);
  animation: pulse 1s ease-in-out infinite;
}

.pattern-slot__button.is-empty {
  opacity: 0.4;
  cursor: default;
}

.pattern-slot__button.is-empty:hover {
  border-color: var(--color-border);
  background: var(--color-bg-primary);
}

.pattern-slot__knob {
  width: 23px;
  height: 23px;
  cursor: ns-resize;
  user-select: none;
}

.pattern-slot__knob-bg {
  fill: var(--color-bg-primary);
  stroke: var(--color-border);
  stroke-width: 2;
}

.pattern-slot__knob-indicator {
  stroke: var(--color-text-secondary);
  stroke-width: 2.5;
  stroke-linecap: round;
  transform-origin: center;
  transition: transform 0.05s linear;
}

.pattern-slot__repeats {
  font-size: 0.5rem;
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* ===================================
   LOOP PEDAL
   =================================== */

.loop-pedal {
  grid-column: 4;
  grid-row: 2 / 5; /* Span rows 2-4 for full height */
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm);
  overflow-y: auto;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin: var(--spacing-md);
  margin-left: 0;
}

.loop-pedal__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0;
}

.loop-pedal__mic-status {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mic-level {
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}

.mic-level__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--color-success), var(--color-warning), var(--color-danger));
  transition: width 50ms linear;
}

.loop-pedal__tracks {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.loop-track {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0 6px;
  border: 1px solid var(--color-border);
}

.loop-track__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.loop-track__name {
  font-size: 0.75rem;
  font-weight: 600;
}

.loop-track__duration {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

.loop-track__controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin-bottom: 4px;
}

.loop-track__controls button {
  font-size: 0.75rem;
  padding: 4px 0;
  min-height: 20px;
}

.loop-track__waveform {
  height: 24px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  border: 1px solid var(--color-border);
}

.loop-pedal__master {
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
}

/* ===================================
   TRANSPORT CONTROLS
   =================================== */

.transport__controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.transport__info {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.transport__tempo,
.transport__position {
  display: flex;
  gap: var(--spacing-sm);
  align-items: baseline;
}

.transport__label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.transport__value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

/* ===================================
   FORM CONTROLS
   =================================== */

.control {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.control--vertical {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: var(--spacing-xs);
  align-items: center;
}

.control--vertical .control__label {
  grid-column: 1 / -1;
}

.control--vertical .control__slider {
  grid-column: 1;
  grid-row: 2;
  min-width: 80px;
}

.control--vertical .control__value {
  grid-column: 2;
  grid-row: 2;
  margin-left: 8px;
  white-space: nowrap;
}

.control__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.control__input {
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.9rem;
  min-width: 80px;
}

.control__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(0, 188, 212, 0.2);
}

.control__slider {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  outline: none;
}

.control__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.control__slider::-webkit-slider-thumb:hover {
  background: var(--color-accent-hover);
  transform: scale(1.1);
}

.control__slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.control__slider::-moz-range-thumb:hover {
  background: var(--color-accent-hover);
  transform: scale(1.1);
}

.control__value {
  font-size: 0.85rem;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

/* ===================================
   TUTORIAL OVERLAY
   =================================== */

.tutorial {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(4px);
}

.tutorial__content {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 500px;
  border: 2px solid var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.tutorial__title {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.tutorial__text {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.tutorial__navigation {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* ===================================
   HELP OVERLAY
   =================================== */

.help {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(4px);
}

.help__content {
  position: relative;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  border: 2px solid var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.help__close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 2rem;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.help__close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.help__title {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent);
}

.help__sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.help__section h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.help__section p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.help__section ul {
  list-style: none;
  padding: 0;
}

.help__section li {
  padding: var(--spacing-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

kbd {
  display: inline-block;
  padding: 4px 8px;
  font-size: 0.85rem;
  font-family: 'Courier New', monospace;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
  min-width: 32px;
  text-align: center;
}

/* ===================================
   TOOLTIP
   =================================== */

.tooltip {
  position: fixed;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text-primary);
  pointer-events: none;
  z-index: var(--z-tooltip);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  max-width: 300px;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Tablet Portrait */
@media (max-width: 1024px) {
  .main {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    gap: var(--spacing-sm);
    overflow-y: auto;
  }

  .presets {
    max-height: 200px;
  }

  .presets__list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-sm);
  }

  .loop-pedal {
    max-height: 400px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .header__title {
    font-size: 1rem;
  }

  .header__right .btn {
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .header__right .btn .icon {
    display: none;
  }

  .transport {
    padding: var(--spacing-md);
  }

  .transport__info {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .btn--transport {
    font-size: 1.2rem;
    min-width: 50px;
    min-height: 50px;
  }

  .sequencer__grid-container {
    grid-template-columns: 80px 1fr;
  }

  .track-name {
    font-size: 0.75rem;
    padding: var(--spacing-xs);
  }
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

@keyframes slideInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.is-recording {
  animation: pulse 1s ease-in-out infinite;
}

/* ===================================
   SCROLLBAR STYLING
   =================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-light);
}

/* ===================================
   INSTRUMENT PICKER MODAL
   =================================== */

.instrument-picker-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.instrument-picker-modal.is-visible {
  opacity: 1;
  visibility: visible;
}

.instrument-picker-modal__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-overlay);
}

.instrument-picker-modal__content {
  position: relative;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.instrument-picker-modal.is-visible .instrument-picker-modal__content {
  transform: scale(1);
}

.instrument-picker-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.instrument-picker-modal__header h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--color-text-primary);
}

.instrument-picker-modal__close {
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.instrument-picker-modal__close:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
}

.instrument-picker-modal__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

/* Instrument Categories */
.instrument-picker__category {
  margin-bottom: var(--spacing-md);
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.instrument-picker__category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-tertiary);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.instrument-picker__category-header:hover {
  background: var(--color-bg-secondary);
}

.instrument-picker__category-name {
  font-weight: 600;
  color: var(--color-text-primary);
}

.instrument-picker__category-toggle {
  color: var(--color-text-secondary);
  transition: transform var(--transition-fast);
}

.instrument-picker__category.is-collapsed .instrument-picker__category-toggle {
  transform: rotate(-90deg);
}

.instrument-picker__instruments {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
}

.instrument-picker__category.is-collapsed .instrument-picker__instruments {
  display: none;
}

.instrument-picker__instrument {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  border: 2px solid transparent;
}

.instrument-picker__instrument:hover {
  background: var(--color-bg-tertiary);
}

.instrument-picker__instrument.is-selected {
  border-color: var(--color-accent);
  background: var(--color-bg-tertiary);
}

.instrument-picker__preview {
  width: 28px;
  height: 28px;
  border: none;
  background: var(--color-bg-primary);
  color: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

.instrument-picker__preview:hover {
  background: var(--color-accent);
  color: var(--color-bg-primary);
  transform: scale(1.1);
}

.instrument-picker__preview:active {
  transform: scale(0.95);
}

.instrument-picker__name {
  font-size: 0.85rem;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Responsive: Single column on small screens */
@media (max-width: 480px) {
  .instrument-picker__instruments {
    grid-template-columns: 1fr;
  }

  .instrument-picker-modal__content {
    width: 95%;
    max-height: 90vh;
  }
}