:root {
  --bg: #0a0a12;
  --bg2: #060810;
  --cyan: #00f0ff;
  --magenta: #ff00aa;
  --green: #39ff14;
  --yellow: #ffd000;
  --panel: #10121f;
  --border: #1e2440;
}

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

body {
  background:
    radial-gradient(circle at 20% 10%, rgba(0,240,255,0.06), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(255,0,170,0.06), transparent 40%),
    var(--bg);
  color: #cfe;
  font-family: 'VT323', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

/* CRT scanlines + vignette */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.18) 0px, rgba(0,0,0,0.18) 1px, transparent 1px, transparent 3px);
  box-shadow: inset 0 0 180px rgba(0,0,0,0.9);
}

#app {
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 16px 40px;
}

header { text-align: center; margin-bottom: 18px; }

h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(16px, 4.5vw, 30px);
  letter-spacing: 1px;
  color: var(--cyan);
  animation: flicker 5s infinite;
}
.glow-cyan {
  text-shadow: 0 0 6px var(--cyan), 0 0 18px rgba(0,240,255,0.6);
}
@keyframes flicker {
  0%,97%,100% { opacity: 1; }
  98% { opacity: 0.6; }
  99% { opacity: 0.9; }
}
.subtitle {
  font-size: 18px;
  color: #7fd;
  margin-top: 10px;
  letter-spacing: 1px;
}

/* Dropzone */
.dropzone {
  border: 3px dashed #2a3a66;
  border-radius: 14px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(0,240,255,0.02);
}
.dropzone:hover { border-color: var(--cyan); }
.drag-over .dropzone, body.drag-over .dropzone { }
.drag-over {
  border-color: var(--cyan) !important;
  box-shadow: 0 0 30px rgba(0,240,255,0.4);
  background: rgba(0,240,255,0.08);
}
.dz-icon { font-size: 48px; margin-bottom: 8px; }
.dz-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 16px;
  color: var(--green);
  text-shadow: 0 0 8px rgba(57,255,20,0.6);
  margin-bottom: 12px;
}
.dz-sub { font-size: 18px; color: #6ba; line-height: 1.4; }
#fileInput { display: none; }

/* Cartridge */
.cartridge {
  background: linear-gradient(180deg, #141830, #0d1020);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  cursor: pointer;
  transition: border-color 0.2s;
}
.cartridge:hover { border-color: var(--cyan); }
.cart-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; align-items: center; }
.badge {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  padding: 6px 8px;
  border-radius: 5px;
}
.badge-fmt { background: var(--magenta); color: #200; }
.badge-chip { background: rgba(0,240,255,0.12); color: var(--cyan); border: 1px solid rgba(0,240,255,0.4); }
.cart-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 15px;
  color: var(--yellow);
  text-shadow: 0 0 8px rgba(255,208,0,0.5);
  margin-bottom: 14px;
  line-height: 1.5;
  word-break: break-word;
}
.cart-meta { display: grid; grid-template-columns: 1fr; gap: 6px; font-size: 19px; }
.cart-meta .lbl {
  color: var(--cyan);
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  margin-right: 8px;
}

/* Canvas */
#canvas {
  width: 100%;
  height: 220px;
  background: #06080e;
  border: 2px solid var(--border);
  border-radius: 10px;
  margin: 16px 0 10px;
  display: block;
  box-shadow: inset 0 0 40px rgba(0,240,255,0.05);
}

.viz-modes { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.vmode {
  flex: 1;
  min-width: 90px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: #6ba;
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  padding: 10px 4px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}
.vmode:hover { border-color: var(--cyan); }
.vmode.active {
  color: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 12px rgba(57,255,20,0.3);
}

/* Transport */
.transport { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.tbtn {
  background: linear-gradient(180deg, #1a2140, #0f1428);
  border: 2px solid var(--border);
  border-bottom-width: 4px;
  color: #cfe;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 12px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.08s;
}
.tbtn:hover:not(:disabled) { border-color: var(--cyan); color: #fff; }
.tbtn:active:not(:disabled) { transform: translateY(2px); border-bottom-width: 2px; }
.tbtn:disabled { opacity: 0.4; cursor: not-allowed; }
.tbtn-main { color: var(--green); }
.toggle-on { color: var(--magenta); border-color: var(--magenta); box-shadow: 0 0 12px rgba(255,0,170,0.3); }
.toggle-off { opacity: 0.7; }

.vol-wrap { display: flex; align-items: center; gap: 6px; flex: 1; min-width: 120px; }
.vol-wrap span { font-size: 20px; }

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: #1a2140;
  border-radius: 4px;
  outline: none;
  flex: 1;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 20px;
  background: var(--cyan);
  border-radius: 3px;
  box-shadow: 0 0 8px var(--cyan);
  cursor: pointer;
}
input[type=range]::-moz-range-thumb {
  width: 16px; height: 20px;
  background: var(--cyan);
  border: none; border-radius: 3px;
  cursor: pointer;
}
input[type=range]:disabled { opacity: 0.4; }

.seek-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.time { font-size: 18px; color: var(--green); min-width: 40px; text-align: center; }

/* Mixer */
.mixer { margin-bottom: 16px; }
.mixer-title, .pl-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--cyan);
  margin-bottom: 10px;
  letter-spacing: 1px;
}
.mixer-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.chbtn {
  background: var(--panel);
  border: 1px solid var(--ch, var(--border));
  color: var(--ch, #6ba);
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  padding: 10px 2px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.12s;
  text-shadow: 0 0 4px currentColor;
}
.chbtn:hover:not(.disabled) { box-shadow: 0 0 10px var(--ch); }
.chbtn.muted {
  opacity: 0.3;
  text-decoration: line-through;
  text-shadow: none;
}
.chbtn.disabled { opacity: 0.15; cursor: not-allowed; border-style: dashed; }

/* Playlist */
.playlist {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 16px;
  max-height: 200px;
  overflow-y: auto;
}
.pl-item {
  font-size: 18px;
  padding: 8px 10px;
  border-radius: 5px;
  cursor: pointer;
  color: #8fa;
  transition: background 0.12s;
  word-break: break-word;
}
.pl-item:hover { background: rgba(0,240,255,0.08); }
.pl-item.active { color: var(--green); background: rgba(57,255,20,0.1); text-shadow: 0 0 6px rgba(57,255,20,0.5); }

/* Message */
.msg {
  font-size: 18px;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 10px;
  transition: opacity 0.6s;
  line-height: 1.4;
}
.msg.ok { background: rgba(57,255,20,0.08); border: 1px solid rgba(57,255,20,0.3); color: var(--green); }
.msg.err { background: rgba(255,0,170,0.08); border: 1px solid rgba(255,0,170,0.4); color: #ff6bc4; animation: shake 0.4s; }
.msg.fade { opacity: 0; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Footer */
footer {
  text-align: center;
  margin-top: 24px;
  font-size: 16px;
  color: #567;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
footer a { color: var(--cyan); text-decoration: none; }
footer a:hover { text-decoration: underline; text-shadow: 0 0 8px var(--cyan); }

.hidden { display: none !important; }

@media (max-width: 560px) {
  .mixer-grid { grid-template-columns: repeat(4, 1fr); }
  .cart-title { font-size: 12px; }
  #canvas { height: 180px; }
}
</parameter>