/* ===== OPLabs Band Channel - ModGUI Styles ===== */

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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-surface: #0f3460;
  --bg-knob: #2a2a4a;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --accent-blue: #4fc3f7;
  --accent-orange: #ff8c00;
  --meter-green: #4caf50;
  --meter-yellow: #ff9800;
  --meter-red: #f44336;
  --mute-red: #e53935;
  --solo-yellow: #ffc107;
  --border-color: #2a2a4a;
  --knob-size: 56px;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 11px;
  user-select: none;
  -webkit-user-select: none;
}

.channel-strip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  height: 100%;
  width: 100%;
  background: var(--bg-secondary);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--accent-orange);
}

/* ===== Header ===== */
.ch-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2px;
}

.ch-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.ch-instrument-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid var(--accent-orange);
  color: var(--accent-orange);
  background: rgba(255, 140, 0, 0.12);
}

/* ===== Mute & Solo Buttons ===== */
.ch-mute-solo {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.ch-btn {
  flex: 1;
  height: 28px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--bg-primary);
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.ch-btn:hover {
  filter: brightness(1.3);
}

.ch-btn.mute.active {
  background: var(--mute-red);
  color: #fff;
  border-color: var(--mute-red);
  box-shadow: 0 0 8px rgba(229, 57, 53, 0.4);
}

.ch-btn.solo.active {
  background: var(--solo-yellow);
  color: #1a1a2e;
  border-color: var(--solo-yellow);
  box-shadow: 0 0 8px rgba(255, 193, 7, 0.4);
}

/* ===== Level Meter ===== */
.ch-meter-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.meter-stereo {
  display: flex;
  gap: 2px;
  height: 70px;
}

.meter-channel {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.meter-label {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-secondary);
}

.meter-track {
  flex: 1;
  width: 100%;
  background: var(--bg-primary);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.meter-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: var(--meter-green);
  transition: height 0.05s linear, background 0.1s ease;
  border-radius: 0 0 1px 1px;
}

.meter-fill.warm {
  background: var(--meter-yellow);
}

.meter-fill.hot {
  background: var(--meter-red);
}

.meter-peak {
  position: absolute;
  left: 1px;
  right: 1px;
  height: 2px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 1px;
  transition: bottom 0.1s ease;
  z-index: 2;
}

.meter-tick {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 1;
}

.meter-db-readout {
  display: flex;
  justify-content: space-between;
  padding: 0 4px;
  font-size: 9px;
  font-family: 'Courier New', monospace;
  color: var(--text-secondary);
}

.meter-db-readout span.hot {
  color: var(--meter-red);
  font-weight: 700;
}

/* ===== Knobs Row ===== */
.ch-knobs-row {
  display: flex;
  gap: 4px;
  justify-content: space-around;
}

.knob-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.knob-label {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.knob-rotary {
  width: var(--knob-size);
  height: var(--knob-size);
  position: relative;
  cursor: pointer;
  touch-action: none;
}

.knob-arc {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-knob);
  border: 2px solid var(--border-color);
  position: relative;
  transition: border-color 0.15s;
}

.knob-arc:hover {
  border-color: var(--accent-blue);
}

.knob-grip {
  position: absolute;
  width: 4px;
  height: 18px;
  background: var(--accent-blue);
  border-radius: 2px;
  left: 50%;
  top: 6px;
  transform-origin: 2px 22px;
  margin-left: -2px;
  transition: background 0.15s;
}

.knob-arc:hover .knob-grip {
  background: #81d4fa;
}

.knob-value {
  font-size: 10px;
  font-weight: 600;
  font-family: 'Courier New', monospace;
  color: var(--text-primary);
  text-align: center;
  min-width: 50px;
}

/* ===== Instrument Selector ===== */
.ch-instrument-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ch-instrument-label {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ch-instrument-select {
  width: 100%;
  height: 28px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--accent-orange);
  border-radius: 4px;
  padding: 0 6px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23ff8c00'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 24px;
}

.ch-instrument-select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 4px rgba(79, 195, 247, 0.3);
}

.ch-instrument-select option {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* ===== Responsive ===== */
@media (max-height: 280px) {
  .channel-strip { gap: 2px; padding: 4px; }
  .meter-stereo { height: 40px; }
  .ch-knobs-row { gap: 2px; }
  :root { --knob-size: 40px; }
  .knob-grip { height: 12px; top: 4px; transform-origin: 2px 16px; }
  .ch-label { font-size: 10px; }
}

@media (min-height: 400px) {
  .meter-stereo { height: 90px; }
  :root { --knob-size: 64px; }
}