/* --- TB-123 Styles --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #030305;
  --red: #FF3B30;
  --cyan: #00FF9D;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e2e8f0;
  --muted: #64748b;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1;
  overflow-x: hidden;
  min-height: 100vh;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

/* Header */
#header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

#brand {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #fff;
}

#transport {
  display: flex;
  align-items: center;
  gap: 6px;
}

#transport button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 32px;
  height: 32px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
}

#transport button:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

#btn-play.active {
  background: var(--cyan);
  color: var(--bg);
  border-color: var(--cyan);
}

#btn-export:hover {
  border-color: var(--red);
  color: var(--red);
}

#btn-export:active {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

#btn-record.active {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
  animation: pulse-record 1s ease-in-out infinite;
}

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

#bpm-slider {
  width: 80px;
  accent-color: var(--cyan);
}

#bpm-display {
  min-width: 40px;
  text-align: center;
  font-size: 11px;
  color: var(--cyan);
}

/* Mode toggle */
#mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

#mode-toggle button {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 16px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.1s;
}

#mode-toggle button:hover {
  color: var(--text);
  border-color: var(--text);
}

#mode-toggle button.active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 255, 157, 0.06);
}

/* Grid */
#grid-container {
  margin-bottom: 16px;
}

#grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.grid-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.channel-label {
  width: 64px;
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--muted);
  text-align: right;
  flex-shrink: 0;
}

.cells {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 2px;
  flex: 1;
}

.cell {
  aspect-ratio: 1;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: all 0.05s;
}

.cell:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
}

.cell.on {
  background: rgba(0, 255, 157, 0.15);
  border-color: var(--cyan);
}

.cell.on:hover {
  background: rgba(0, 255, 157, 0.25);
}

.cell.playing {
  border-color: #fff;
}

.cell.on.playing {
  box-shadow: 0 0 8px var(--cyan);
  background: var(--cyan);
}

.cell-lead {
  margin-left: 2px;
}

/* Controls */
#synth-controls, #drum-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  margin-bottom: 16px;
}

.control-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.control-label {
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--muted);
}

.control-value {
  font-size: 10px;
  color: var(--cyan);
}

input[type="range"] {
  width: 120px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--cyan);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--cyan);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

#wave-select {
  display: flex;
  gap: 4px;
}

.wave-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 3px 10px;
  font-family: inherit;
  font-size: 10px;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: all 0.1s;
}

.wave-btn:hover {
  color: var(--text);
  border-color: var(--text);
}

.wave-btn.active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 255, 157, 0.06);
}

.hidden { display: none !important; }

/* Keymap footer */
#keymap {
  text-align: center;
  font-size: 9px;
  color: var(--muted);
  padding-top: 12px;
  border-top: 1px solid var(--border);
  letter-spacing: 0.5px;
}

@media (max-width: 560px) {
  #app { padding: 8px; }
  .control-group input[type="range"] { width: 80px; }
  .channel-label { width: 40px; font-size: 8px; }
}