:root {
  --bg: #0a0a0f;
  --bg2: #0f0f1a;
  --bg3: #1a1a2e;
  --cyan: #00f0ff;
  --magenta: #ff00aa;
  --green: #00ff88;
  --amber: #ffaa00;
  --red: #ff3355;
  --text: #e0e0ee;
  --text-dim: #667;
  --glow-cyan: 0 0 12px #00f0ff66, 0 0 30px #00f0ff22;
  --glow-magenta: 0 0 12px #ff00aa66, 0 0 30px #ff00aa22;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* HEADER */
#header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: linear-gradient(180deg, #12122a 0%, var(--bg) 100%);
  border-bottom: 1px solid #1a1a3a;
  flex-shrink: 0;
}

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

#title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
  animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
  0%,100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

#subtitle {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
}

#fps-counter {
  font-family: 'Orbitron', sans-serif;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  background: #0a0a1a;
  border: 1px solid #1a1a3a;
  color: var(--green);
  min-width: 80px;
  text-align: center;
}
#fps-counter.warn { color: var(--amber); border-color: #3a3a1a; }
#fps-counter.bad { color: var(--red); border-color: #3a1a1a; }

/* CONTROLS */
#controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--bg2);
  border-bottom: 1px solid #1a1a3a;
  flex-shrink: 0;
  flex-wrap: wrap;
}

#controls-left { display:flex; gap:6px; align-items:center; }
#controls-center { display:flex; gap:16px; align-items:center; flex:1; justify-content:center; }
#controls-right { display:flex; gap:6px; }

#btn-load {
  position: relative;
  background: linear-gradient(135deg, #1a1a3a, #2a1a3a);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.2s;
  box-shadow: var(--glow-cyan);
  overflow: hidden;
}
#btn-load:hover {
  background: linear-gradient(135deg, #2a2a4a, #3a2a4a);
  box-shadow: 0 0 20px #00f0ff44, 0 0 40px #00f0ff22;
}
#btn-load input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.ctrl-btn {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  border: 1px solid #2a2a4a;
  background: var(--bg3);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ctrl-btn:hover:not(:disabled) {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
  color: var(--cyan);
}
.ctrl-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.slider-group label {
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--text-dim);
  font-weight: 700;
}
.slider-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100px;
  height: 4px;
  border-radius: 2px;
  background: var(--bg3);
  outline: none;
}
.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  box-shadow: 0 0 8px var(--cyan);
}
.slider-group span {
  font-size: 11px;
  color: var(--cyan);
  min-width: 40px;
  text-align: right;
}

/* PROGRESS BAR */
#progress-bar-container {
  padding: 4px 16px 6px;
  background: var(--bg);
  flex-shrink: 0;
}
#progress-bar {
  height: 6px;
  background: var(--bg3);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  border-radius: 3px;
  transition: width 0.1s linear;
}
#time-display {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* MAIN AREA */
#main-area {
  flex: 1;
  display: flex;
  min-height: 0;
  position: relative;
}

#canvas-container {
  flex: 1;
  position: relative;
  min-width: 0;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#stats-overlay {
  position: absolute;
  top: 8px;
  left: 8px;
  display: flex;
  gap: 16px;
  background: #0a0a0fcc;
  border: 1px solid #1a1a3a;
  border-radius: 6px;
  padding: 6px 12px;
  pointer-events: none;
}
#stats-overlay div {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.stat-label {
  font-size: 8px;
  color: var(--text-dim);
  letter-spacing: 1px;
}
#stats-overlay span:not(.stat-label) {
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
}

#drop-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a0a0fdd;
  z-index: 10;
  transition: opacity 0.3s;
}
#drop-overlay.hidden { opacity:0; pointer-events:none; }

#drop-content {
  text-align: center;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
#drop-icon { font-size: 64px; margin-bottom: 16px; }
#drop-text {
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  color: var(--cyan);
  letter-spacing: 2px;
}
#drop-text span {
  font-size: 11px;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

/* SIDEBAR */
#sidebar {
  width: 260px;
  background: var(--bg2);
  border-left: 1px solid #1a1a3a;
  padding: 12px;
  overflow-y: auto;
  flex-shrink: 0;
  transition: width 0.3s, padding 0.3s, opacity 0.3s;
}
#sidebar.hidden {
  width: 0;
  padding: 0;
  opacity: 0;
  overflow: hidden;
}
#sidebar h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--magenta);
  margin-bottom: 10px;
}
#sidebar h4 {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin: 12px 0 6px;
}
.sidebar-empty {
  font-size: 11px;
  color: var(--text-dim);
}

.track-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  border-bottom: 1px solid #1a1a2a;
  font-size: 10px;
}
.track-color {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}
.track-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}
.track-notes {
  color: var(--text-dim);
  font-size: 9px;
}
.track-btn {
  font-size: 8px;
  padding: 2px 5px;
  border: 1px solid #2a2a4a;
  background: transparent;
  color: var(--text-dim);
  border-radius: 3px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
}
.track-btn.active {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 6px #00f0ff33;
}
.track-btn:hover { border-color: var(--cyan); }

#channel-colors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
}
.ch-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 9px;
  color: var(--text-dim);
}
.ch-dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

/* FOOTER */
#footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 16px;
  font-size: 10px;
  color: var(--text-dim);
  background: var(--bg2);
  border-top: 1px solid #1a1a3a;
  flex-shrink: 0;
}
#footer a {
  color: var(--magenta);
  text-decoration: none;
}
#footer a:hover { text-decoration: underline; }

/* DRAG OVER */
body.drag-over #drop-overlay {
  background: #0a0a2fdd;
  border: 2px dashed var(--cyan);
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 3px; }

/* MOBILE */
@media (max-width: 700px) {
  #controls-center { display: none; }
  #stats-overlay { gap: 8px; padding: 4px 8px; }
  .stat-label { font-size: 7px; }
  #stats-overlay span:not(.stat-label) { font-size: 10px; }
  #sidebar { width: 200px; }
  #title { font-size: 14px; }
}