/* SynthelicZ Drums — styles.css
   Dark-neon theme · 2x2 grid layout · 60 fps animations */

:root {
  --bg-primary: #0d0d12;
  --bg-secondary: #15151e;
  --bg-surface: #1c1c2a;
  --bg-elevated: #242438;
  --text-primary: #e0e0ec;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --accent-cyan: #0af0fc;
  --accent-magenta: #f040a0;
  --accent-orange: #ff8c00;
  --accent-green: #40e080;
  --accent-red: #f44336;
  --glow-cyan: 0 0 12px rgba(10, 240, 252, 0.4);
  --glow-magenta: 0 0 12px rgba(240, 64, 160, 0.4);
  --border-color: #2a2a40;
  --border-radius: 6px;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', Consolas, monospace;
  --transition-fast: 120ms ease-out;
  --transition-normal: 250ms ease-out;
  --transition-slow: 400ms ease-out;
  --z-transport: 100;
  --z-mixer: 90;
  --z-overlay: 200;
}

/* ── Light mode overrides ────────────────────────────────── */
html.light-mode {
  --bg-primary: #f5f5f5;
  --bg-secondary: #e8e8ec;
  --bg-surface: #ffffff;
  --bg-elevated: #f0f0f4;
  --text-primary: #1a1a2e;
  --text-secondary: #555570;
  --text-muted: #8888a0;
  --border-color: #c8c8d4;
}

/* Darken kit SVG elements in light mode so colors are visible on white */
html.light-mode #audio .abcjs-inline-audio .abcjs-btn svg,
html.light-mode #audio .abcjs-inline-audio .abcjs-btn svg path,
html.light-mode #audio .abcjs-inline-audio .abcjs-btn svg polygon,
html.light-mode #audio .abcjs-inline-audio .abcjs-btn svg rect,
html.light-mode #audio .abcjs-inline-audio .abcjs-btn svg line {
  fill: #111 !important;
  stroke: #111 !important;
}
html.light-mode #drum-kit-svg { filter: saturate(1.6) brightness(0.65); }
html.light-mode #drum-kit-svg .kit-hardware { opacity: 0.45; }
html.light-mode #lane-viewport { background: linear-gradient(180deg, #f0f0f4 0%, #e8e8ec 100%); }

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
  width: 100vw;
}

/* Transport Bar */
#transport {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-transport);
  flex-wrap: wrap;
}
#transport .brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1em;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
  white-space: nowrap;
}
#transport .controls { display: flex; gap: 6px; align-items: center; }
#transport button {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 6px 14px;
  font-size: 0.9em;
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
#transport button:hover { background: var(--bg-surface); box-shadow: var(--glow-cyan); }
#transport button:active { transform: scale(0.96); }
#transport button:disabled { opacity: 0.35; cursor: default; box-shadow: none; }
#transport button.active {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  border-color: var(--accent-cyan);
}
#transport #btn-record.active {
  background: var(--accent-red);
  color: #fff;
  border-color: var(--accent-red);
  box-shadow: 0 0 12px rgba(244, 67, 54, 0.5);
  animation: record-pulse 1.2s ease-in-out infinite;
}
@keyframes record-pulse {
  0%, 100% { box-shadow: 0 0 12px rgba(244, 67, 54, 0.5); }
  50% { box-shadow: 0 0 20px rgba(244, 67, 54, 0.8); }
}
#transport .tempo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--text-secondary);
}
#transport .tempo input {
  width: 60px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: var(--font-mono);
  padding: 4px 8px;
  text-align: center;
}
#transport .spacer { flex: 1; }
#transport .beam-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85em;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
}

/* Main 2x2 Grid */
#main {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(400px, 2fr);
  grid-template-rows: 1fr minmax(180px, 35%);
  gap: 0;
  overflow: hidden;
  min-height: 0;
}

/* Top-left: Falling lanes */
#lane-viewport {
  grid-column: 1;
  grid-row: 1;
  position: relative;
  overflow: hidden;
  min-height: 80px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  border-right: 1px solid var(--border-color);
}
#lane-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

/* Top-right: Tabbed editor area */
#right-top {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

/* Bottom-left: Drum kit SVG */
#kit-viewport {
  grid-column: 1;
  grid-row: 2;
  position: relative;
  overflow: hidden;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}
#kit-viewport img, #kit-viewport svg { max-width: 100%; max-height: 100%; object-fit: contain; }

.kit-pad {
  position: absolute;
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  will-change: transform, filter;
}
.kit-pad:hover { filter: brightness(1.3); }
.kit-pad.hit {
  transform: scale(1.12);
  filter: brightness(1.6) drop-shadow(var(--glow-cyan));
  animation: pad-bounce 150ms ease-out;
}
@keyframes pad-bounce {
  0% { transform: scale(1.2); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

/* Bottom-right: Sheet belt */
#sheet-belt {
  grid-column: 2;
  grid-row: 2;
  overflow: hidden;
  white-space: nowrap;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
  padding: 0;
  position: relative;
  min-height: 0;
}
#sheet-belt .scroll-track {
  display: inline-flex;
  will-change: transform;
  transition: none;
}

/* Tab bar */
#editor-tabs {
  display: flex;
  gap: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}
#editor-tabs .tab-btn {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 8px 18px;
  font-size: 0.9em;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
#editor-tabs .tab-btn:hover { color: var(--text-primary); background: var(--bg-surface); }
#editor-tabs .tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: var(--bg-surface);
}

/* Tab panes */
#tab-panes { flex: 1; position: relative; overflow: hidden; min-height: 0; }
.tab-pane { display: none; position: absolute; inset: 0; overflow: auto; }
.tab-pane.active { display: block; }
#score-viewport { padding: 16px; min-height: 0; }

/* ABC notation text */
#tab-abc { padding: 16px; }
#abc-text {
  font-family: var(--font-mono);
  font-size: 0.92em;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 14px 18px;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  user-select: text;
  cursor: text;
  tab-size: 4;
  overflow: auto;
  max-height: 100%;
}

/* abcjs paper + audio */
#paper {
  background: var(--bg-surface);
  border-radius: var(--border-radius);
  padding: 12px;
}
#paper svg { width: 100%; height: auto; }
#audio { display: flex; align-items: center; }
#audio .abcjs-inline-audio {
  background: transparent !important;
  border-radius: var(--border-radius) !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex !important;
  align-items: center !important;
  gap: 4px !important;
}
#audio .abcjs-inline-audio .abcjs-btn {
  background: var(--bg-elevated) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--border-radius) !important;
  cursor: pointer !important;
  transition: background var(--transition-fast) !important;
}
#audio .abcjs-inline-audio .abcjs-btn:hover {
  background: var(--bg-surface) !important;
  box-shadow: var(--glow-cyan) !important;
}
#audio .abcjs-inline-audio .abcjs-btn svg,
#audio .abcjs-inline-audio .abcjs-btn svg path,
#audio .abcjs-inline-audio .abcjs-btn svg polygon,
#audio .abcjs-inline-audio .abcjs-btn svg rect,
#audio .abcjs-inline-audio .abcjs-btn svg line {
  fill: #fff !important;
  stroke: #fff !important;
}
#audio .abcjs-inline-audio .abcjs-midi-clock {
  color: var(--text-secondary) !important;
  font-family: var(--font-mono) !important;
}
#audio .abcjs-inline-audio .abcjs-midi-progress-background {
  background: var(--bg-elevated) !important;
  border: 1px solid var(--border-color) !important;
}
#audio .abcjs-inline-audio .abcjs-midi-progress-indicator {
  background: var(--accent-cyan) !important;
}
.highlight { fill: var(--accent-cyan) !important; }
.abcjs-cursor { stroke: var(--accent-magenta) !important; stroke-width: 2px; }
.abcjs-css-warning { display: none; }

/* Bar Editor */
#bar-editor-viewport {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 10px;
  overflow: auto;
}
#bar-editor-viewport .placeholder-text {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.95em;
  text-align: center;
  margin: auto;
}
#bar-editor-viewport.bar-editor { justify-content: flex-start; }

.bar-toolbar { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.bar-counter {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--text-primary);
  min-width: 90px;
  text-align: center;
  user-select: none;
}
.bar-nav-btn, .bar-action-btn {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 5px 12px;
  font-size: 0.85em;
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}
.bar-nav-btn:hover, .bar-action-btn:hover { background: var(--bg-surface); box-shadow: var(--glow-cyan); }
.bar-nav-btn:active, .bar-action-btn:active { transform: scale(0.95); }
.bar-nav-btn:disabled, .bar-action-btn:disabled { opacity: 0.3; cursor: default; box-shadow: none; transform: none; }
.bar-del-btn:hover:not(:disabled) { border-color: var(--accent-red); box-shadow: 0 0 8px rgba(244, 67, 54, 0.4); }
.bar-toolbar-spacer { flex: 1; }

.bar-grid { flex: 1; overflow: auto; min-height: 0; }
.bar-grid-table {
  border-collapse: collapse;
  width: 100%;
  table-layout: fixed;
  font-family: var(--font-mono);
  user-select: none;
}
.bar-grid-table thead th {
  padding: 4px 0;
  text-align: center;
  font-size: 0.75em;
  font-weight: 400;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}
.grid-corner { width: 36px; min-width: 36px; }
.grid-col-header.beat-start { border-left: 2px solid var(--border-color); }

.grid-row-header {
  width: 36px;
  min-width: 36px;
  padding: 0 4px;
  text-align: right;
  font-size: 0.78em;
  font-weight: 700;
  white-space: nowrap;
  border-right: 1px solid var(--border-color);
  user-select: none;
  height: 28px;
  box-sizing: border-box;
  line-height: 28px;
  overflow: hidden;
}

.grid-cell {
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  padding: 0;
  font-size: 1em;
  line-height: 26px;
  border: 1px solid var(--bg-primary);
  border-radius: 3px;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  min-width: 26px;
  height: 28px;
  max-height: 28px;
  box-sizing: border-box;
  overflow: hidden;
}
.grid-cell:empty::after { content: '\200B'; }
.grid-cell:hover { filter: brightness(1.35); transform: scale(1.08); z-index: 1; position: relative; }
.grid-cell.beat-start { border-left: 2px solid var(--border-color); }
.grid-cell[data-state="not played"] { background-color: var(--bg-elevated); color: transparent; }
.bar-grid-table tbody tr:nth-child(odd) .grid-cell[data-state="not played"] { background-color: var(--bg-surface); }

.hex-row { border-top: 2px solid var(--border-color); }
.hex-label { font-size: 0.72em; color: var(--text-muted); text-align: right; padding-right: 4px; }
.hex-cell {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72em;
  padding: 3px 0;
  color: var(--text-muted);
  user-select: all;
}
.hex-cell.beat-start { border-left: 2px solid var(--border-color); }

.bar-serial { flex-shrink: 0; padding: 4px 0; }
.bar-serial-code {
  font-family: var(--font-mono);
  font-size: 0.78em;
  color: var(--text-secondary);
  word-break: break-all;
  user-select: all;
}

.bar-editor-instructions {
  font-size: 0.82em;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 8px 12px;
  line-height: 1.6;
}
.bar-editor-instructions strong { color: var(--accent-cyan); }
.bar-editor-instructions b { color: var(--text-primary); }

/* Context menu */
.bar-context-menu {
  position: fixed;
  z-index: 300;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
  min-width: 160px;
  max-width: 240px;
  padding: 4px 0;
  font-size: 0.85em;
  user-select: none;
}
.ctx-header {
  padding: 6px 12px;
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.9em;
  border-bottom: 1px solid var(--border-color);
}
.ctx-separator { height: 1px; background: var(--border-color); margin: 4px 0; }
.ctx-item {
  padding: 5px 14px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background var(--transition-fast);
  white-space: nowrap;
}
.ctx-item:hover { background: var(--bg-surface); color: var(--accent-cyan); }
.ctx-action { color: var(--text-secondary); font-size: 0.92em; }

/* Record overlay (key map + beat indicator) */
.record-overlay {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}
.record-overlay[hidden] { display: none; }

.key-map {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}
.key-map-title {
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 700;
  color: var(--accent-red);
  margin-right: 4px;
  white-space: nowrap;
}
.key-hint {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: 0.78em;
  color: var(--text-secondary);
  white-space: nowrap;
}
.key-hint kbd {
  display: inline-block;
  min-width: 20px;
  padding: 1px 5px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.4;
  box-shadow: 0 1px 0 var(--border-color);
  transition: background var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}
.key-hint.flash kbd {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  box-shadow: var(--glow-cyan);
}

.beat-indicator {
  display: flex;
  gap: 8px;
  align-items: center;
}
.beat-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 700;
  color: var(--text-muted);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}
.beat-dot.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: var(--bg-primary);
  box-shadow: var(--glow-cyan);
}

/* Light mode overrides for record overlay */
html.light-mode .key-hint.flash kbd {
  background: #0090a0;
  color: #fff;
}
html.light-mode .beat-dot.active {
  background: #0090a0;
  border-color: #0090a0;
  color: #fff;
}

/* Mixer / Status */
#mixer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  z-index: var(--z-mixer);
  font-size: 0.85em;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
#mixer .status { font-family: var(--font-mono); }
#mixer button {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 4px 12px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
#mixer button:hover { background: var(--bg-surface); }
#mixer button:disabled { opacity: 0.35; cursor: default; }

/* Particle canvas overlay */
#particles { position: fixed; inset: 0; pointer-events: none; z-index: var(--z-overlay); }

/* Tap tempo button */
#btn-tap-tempo { font-family: var(--font-mono); min-width: 50px; }

/* Record overlay options */
.record-options { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.overdub-toggle {
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: 0.82em;
  color: var(--text-secondary); cursor: pointer; white-space: nowrap;
}

/* Armed state (pulsing border before first key) */
.record-overlay.armed { border-bottom-color: var(--accent-red); animation: armed-pulse 1.5s ease-in-out infinite; }
@keyframes armed-pulse {
  0%, 100% { border-bottom-color: var(--accent-red); }
  50% { border-bottom-color: var(--accent-orange); }
}

/* Beat-1 accent for metronome dots */
.beat-dot.active[data-beat="1"] {
  background: var(--accent-orange); border-color: var(--accent-orange);
  box-shadow: 0 0 12px rgba(255, 140, 0, 0.5);
}
html.light-mode .beat-dot.active[data-beat="1"] {
  background: #c06000; border-color: #c06000; color: #fff;
}

/* Responsive: narrow screens stack vertically */
@media (max-width: 768px) {
  #main {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto 1fr auto;
  }
  #lane-viewport { grid-column: 1; grid-row: 1; border-right: none; border-bottom: 1px solid var(--border-color); }
  #right-top { grid-column: 1; grid-row: 2; }
  #kit-viewport { grid-column: 1; grid-row: 3; border-right: none; }
  #sheet-belt { grid-column: 1; grid-row: 4; border-left: none; }
  #transport { font-size: 0.85em; padding: 6px 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .kit-pad.hit { animation: none; }
}