:root {
  --bg-dark: #0d0d1a;
  --bg-panel: #141428;
  --bezel-brown: #3d2b1f;
  --bezel-dark: #2a1d14;
  --commodore-red: #C5302A;
  --accent-cyan: #87D6DD;
  --border-subtle: #2a2a4a;
  --text-dim: #6a6a8a;
  --text-bright: #e0e0ff;
  --led-green: #00ff44;
}

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

body {
  background: var(--bg-dark);
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(135,214,221,0.03) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(197,48,42,0.02) 0%, transparent 50%);
  color: var(--text-bright);
  font-family: 'IBM Plex Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

.font-retro { font-family: 'Press Start 2P', cursive; }
.font-mono { font-family: 'IBM Plex Mono', monospace; }

/* CRT Effects */
.crt-container {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

.crt-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.15) 1px,
    rgba(0,0,0,0.15) 2px
  );
  pointer-events: none;
  z-index: 2;
}

.crt-glow {
  position: absolute;
  inset: -4px;
  border-radius: 24px;
  box-shadow: 
    inset 0 0 60px rgba(135,214,221,0.05),
    0 0 30px rgba(135,214,221,0.08),
    0 0 60px rgba(135,214,221,0.04);
  pointer-events: none;
  z-index: 3;
}

.crt-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
  z-index: 4;
}

.crt-curvature {
  border-radius: 16px;
}

/* Bezel */
.bezel {
  background: linear-gradient(145deg, #4a3628, #2a1d14);
  border-radius: 28px;
  padding: 16px;
  box-shadow: 
    0 8px 32px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.3);
}

/* LED */
.led-power {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--led-green);
  box-shadow: 0 0 6px var(--led-green), 0 0 12px var(--led-green);
  animation: led-blink 2s ease-in-out infinite;
}

.led-off {
  background: #333;
  box-shadow: none;
  animation: none;
}

@keyframes led-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Status flag LEDs */
.flag-led {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  transition: all 0.1s;
}

.flag-on {
  background: #ff4444;
  box-shadow: 0 0 4px #ff4444;
}

.flag-off {
  background: #331111;
}

/* Buttons */
.hw-btn {
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.1s;
  letter-spacing: 0.5px;
  position: relative;
  top: 0;
}

.hw-btn:active {
  top: 2px;
  filter: brightness(0.8);
}

.hw-btn-green { background: #22aa44; color: #fff; box-shadow: 0 3px 0 #177730; }
.hw-btn-yellow { background: #ccaa22; color: #222; box-shadow: 0 3px 0 #997711; }
.hw-btn-orange { background: #cc6622; color: #fff; box-shadow: 0 3px 0 #994411; }
.hw-btn-red { background: #cc2222; color: #fff; box-shadow: 0 3px 0 #991111; }

/* Upload zones */
.upload-zone {
  border: 2px dashed var(--border-subtle);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(20,20,40,0.5);
}

.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent-cyan);
  background: rgba(135,214,221,0.05);
}

.upload-zone.loaded {
  border-color: #22aa44;
  border-style: solid;
  background: rgba(34,170,68,0.05);
}

/* Panel */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 16px;
}

/* VIC-20 Keyboard */
.vic-key {
  background: linear-gradient(180deg, #d4c4a0, #b8a880);
  color: #222;
  border: 1px solid #8a7a5a;
  border-radius: 4px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 32px;
  padding: 2px 4px;
  transition: all 0.05s;
  user-select: none;
  box-shadow: 0 2px 0 #8a7a5a;
}

.vic-key:active, .vic-key.pressed {
  background: linear-gradient(180deg, #b8a880, #a09068);
  transform: translateY(1px);
  box-shadow: 0 1px 0 #8a7a5a;
}

.vic-key-dark {
  background: linear-gradient(180deg, #5a5040, #4a4030);
  color: #ddd;
  border-color: #3a3020;
  box-shadow: 0 2px 0 #3a3020;
}

.vic-key-dark:active, .vic-key-dark.pressed {
  background: linear-gradient(180deg, #4a4030, #3a3020);
}

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

/* Canvas rendering */
canvas { image-rendering: pixelated; image-rendering: crisp-edges; }

/* Debug panel */
.debug-panel {
  max-height: 400px;
  overflow-y: auto;
}

.mem-byte {
  font-size: 11px;
  padding: 1px 2px;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .bezel { padding: 8px; border-radius: 16px; }
  .vic-key { min-width: 28px; height: 28px; font-size: 8px; }
}