:root {
  --wood-color: #5c3e21; /* Walnut */
  --metal-bg: linear-gradient(180deg, #323639 0%, #222527 100%);
  --metal-highlight: #454a4f;
  --display-green: #39ff14;
  --led-red: #ff3333;
  
  --font-synth: 'Share Tech Mono', monospace;
}

body {
  margin: 0;
  padding: 0;
  background-color: #121314;
  color: #a1a1aa;
  font-family: var(--font-synth);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.synth-case {
  display: flex;
  width: 90%;
  max-width: 800px;
  height: 480px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Wood panels */
.wood-panel {
  width: 35px;
  background: var(--wood-color);
  background-image: linear-gradient(90deg, rgba(0,0,0,0.4) 0%, rgba(255,255,255,0.08) 50%, rgba(0,0,0,0.5) 100%);
  border-top: 1px solid rgba(255,255,255,0.1);
  box-shadow: inset 1px 0 0 rgba(255,255,255,0.1), inset -1px 0 0 rgba(0,0,0,0.4);
}

.wood-left {
  border-top-left-radius: 6px;
  border-bottom-left-radius: 6px;
}

.wood-right {
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
}

/* Metal deck console */
.synth-deck {
  flex-grow: 1;
  background: var(--metal-bg);
  border-top: 1px solid var(--metal-highlight);
  box-shadow: inset 0 15px 30px rgba(0,0,0,0.4);
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.synth-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #1a1c1e;
  padding-bottom: 15px;
}

.hub-btn {
  color: #fff;
  text-decoration: none;
  font-size: 11px;
  border: 1px solid #444;
  background: #111;
  padding: 4px 10px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
}

.hub-btn:hover {
  background: #222;
}

.synth-logo {
  font-size: 1.3rem;
  font-weight: normal;
  color: #fff;
  letter-spacing: 2px;
  margin: 0;
}

.led-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
}

.led-bulb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #222;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.8);
}

.led-red.active {
  background-color: var(--led-red);
  box-shadow: 0 0 8px var(--led-red), inset 0 1px 1px rgba(255,255,255,0.4);
}

.led-label {
  font-size: 10px;
  color: #888;
}

/* Controls Knobs & Faders */
.synth-controls {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-grow: 1;
  padding: 20px 0;
}

.control-station {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.control-station label {
  font-size: 11px;
  letter-spacing: 1px;
  color: #aaa;
}

.knob-wrapper {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #151718;
  border: 2px solid #111;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.8), 0 1px 0 rgba(255,255,255,0.05);
  display: flex;
  justify-content: center;
  align-items: center;
}

.synth-knob {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, #454a4f 0%, #1c1d1f 100%);
  box-shadow: 0 4px 8px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.2);
  position: relative;
  cursor: grab;
  transform: rotate(-135deg); /* -135deg to +135deg range */
}

.synth-knob:active {
  cursor: grabbing;
}

.knob-pointer {
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 14px;
  background-color: #fff;
  border-radius: 2px;
}

/* Volume Fader */
.fader-track {
  width: 20px;
  height: 90px;
  background: #111;
  border-radius: 4px;
  position: relative;
  box-shadow: inset 1px 1px 2px rgba(0,0,0,0.8);
}

.fader-groove {
  position: absolute;
  left: 50%;
  top: 5px;
  transform: translateX(-50%);
  width: 2px;
  height: 80px;
  background-color: #000;
}

.fader-handle {
  position: absolute;
  left: 50%;
  bottom: 60px; /* 0px to 68px range */
  transform: translateX(-50%);
  width: 32px;
  height: 18px;
  background: linear-gradient(180deg, #5c6267 0%, #222 100%);
  border: 1px solid #111;
  border-radius: 3px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.2);
  cursor: row-resize;
}

.fader-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--led-red);
  transform: translateY(-50%);
}

.value-readout {
  background: #0d0e0f;
  border: 1px solid #222;
  color: var(--display-green);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 3px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.8);
}

/* Keybed */
.synth-keys {
  display: flex;
  height: 130px;
  background-color: #000;
  padding-top: 4px;
  position: relative;
  box-shadow: inset 0 8px 10px rgba(0,0,0,0.7);
}

.key {
  cursor: pointer;
}

.key.white {
  flex-grow: 1;
  background: linear-gradient(180deg, #f0f0f0 0%, #ffffff 100%);
  border: 1px solid #aaa;
  border-bottom: 4px solid #ddd;
  border-bottom-left-radius: 3px;
  border-bottom-right-radius: 3px;
  z-index: 1;
  box-shadow: inset 0 1px 0 #fff;
}

.key.white:active, .key.white.active {
  background: #e0e0e0;
  border-bottom: 1px solid #888;
  height: 127px;
}

.key.black {
  width: 24px;
  height: 80px;
  background: linear-gradient(180deg, #333 0%, #000 100%);
  border: 1px solid #000;
  border-bottom-left-radius: 2px;
  border-bottom-right-radius: 2px;
  margin-left: -12px;
  margin-right: -12px;
  z-index: 2;
  box-shadow: 0 4px 6px rgba(0,0,0,0.6);
}

.key.black:active, .key.black.active {
  background: #111;
  height: 78px;
}