:root {
  --green: #00ff41;
  --green-dim: #00aa2a;
  --green-dark: #003d10;
  --amber: #ffb000;
  --amber-dim: #cc8d00;
  --red: #ff3333;
  --bg: #0a0a0a;
  --bg-light: #141414;
  --bg-panel: #111411;
  --pcb: #1a472a;
  --pcb-dark: #0f2e1a;
  --copper: #b87333;
  --copper-light: #d4954a;
  --chip-body: #1a1a2e;
  --chip-pin: #c0c0c0;
}

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

body {
  background: var(--bg);
  color: var(--green);
  font-family: 'VT323', monospace;
  overflow-x: hidden;
  min-height: 100vh;
}

#scanlines {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
}

.font-pixel { font-family: 'Press Start 2P', cursive; }
.font-vt { font-family: 'VT323', monospace; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

.crt-glow {
  text-shadow: 0 0 10px var(--green), 0 0 20px var(--green), 0 0 40px rgba(0,255,65,0.3);
}

.amber-glow {
  text-shadow: 0 0 10px var(--amber), 0 0 20px var(--amber), 0 0 40px rgba(255,176,0,0.3);
}

.crt-screen {
  border: 2px solid #333;
  border-radius: 8px;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.6), 0 0 20px rgba(0,255,65,0.1);
  background: #050505;
  position: relative;
  overflow: hidden;
}

.crt-screen::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
  z-index: 1;
}

.pcb-bg {
  background: linear-gradient(135deg, var(--pcb-dark), var(--pcb), var(--pcb-dark));
  position: relative;
}

.pcb-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(90deg, transparent 49.5%, rgba(184,115,51,0.08) 49.5%, rgba(184,115,51,0.08) 50.5%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, rgba(184,115,51,0.08) 49.5%, rgba(184,115,51,0.08) 50.5%, transparent 50.5%);
  background-size: 20px 20px;
  pointer-events: none;
}

.retro-btn {
  font-family: 'Press Start 2P', cursive;
  font-size: 10px;
  padding: 8px 16px;
  border: 2px solid var(--green);
  background: var(--bg);
  color: var(--green);
  cursor: pointer;
  transition: all 0.1s;
  text-transform: uppercase;
  position: relative;
}

.retro-btn:hover {
  background: var(--green-dark);
  box-shadow: 0 0 10px rgba(0,255,65,0.3);
}

.retro-btn:active {
  transform: translateY(2px);
}

.retro-btn.active {
  background: var(--green);
  color: var(--bg);
}

.retro-btn.amber {
  border-color: var(--amber);
  color: var(--amber);
}

.retro-btn.amber:hover {
  background: rgba(255,176,0,0.1);
  box-shadow: 0 0 10px rgba(255,176,0,0.3);
}

.retro-btn.amber.active {
  background: var(--amber);
  color: var(--bg);
}

.retro-btn.red {
  border-color: var(--red);
  color: var(--red);
}

.retro-toggle {
  width: 40px;
  height: 20px;
  border: 2px solid var(--green);
  border-radius: 10px;
  background: var(--bg);
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}

.retro-toggle.on {
  background: var(--green-dark);
  border-color: var(--green);
}

.retro-toggle::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #666;
  top: 2px;
  left: 2px;
  transition: all 0.2s;
}

.retro-toggle.on::after {
  left: 22px;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.led-bar {
  width: 16px;
  height: 6px;
  margin: 1px 0;
  border-radius: 1px;
  transition: all 0.1s;
}

.drop-zone {
  border: 3px dashed #333;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.drop-zone.dragover {
  border-color: var(--green);
  background: rgba(0,255,65,0.05);
  box-shadow: inset 0 0 30px rgba(0,255,65,0.1);
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 10px,
    rgba(0,255,65,0.02) 10px,
    rgba(0,255,65,0.02) 20px
  );
  pointer-events: none;
}

.register-cell {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 3px 6px;
  background: rgba(0,0,0,0.5);
  border: 1px solid #222;
  color: var(--green);
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 36px;
}

.register-cell:hover {
  border-color: var(--green);
  box-shadow: 0 0 5px rgba(0,255,65,0.2);
}

.register-cell.active {
  border-color: var(--amber);
  color: var(--amber);
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes chip-boot {
  0% { opacity: 0; transform: scale(0.9); }
  100% { opacity: 1; transform: scale(1); }
}

.animate-boot {
  animation: chip-boot 0.6s ease-out;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.blink { animation: blink 1s infinite; }

.progress-bar {
  height: 12px;
  background: #111;
  border: 1px solid #333;
  position: relative;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--green);
  transition: width 0.3s;
  image-rendering: pixelated;
  background-image: repeating-linear-gradient(
    90deg,
    var(--green) 0px,
    var(--green) 6px,
    var(--green-dark) 6px,
    var(--green-dark) 8px
  );
}

.chip-pin {
  transition: all 0.15s;
}

.chip-pin.active {
  fill: var(--green);
  filter: drop-shadow(0 0 4px var(--green));
}

.env-shape {
  cursor: pointer;
  border: 1px solid #333;
  padding: 2px;
  transition: all 0.15s;
}

.env-shape:hover { border-color: var(--green-dim); }
.env-shape.active { border-color: var(--green); box-shadow: 0 0 6px rgba(0,255,65,0.3); }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

.tooltip-container { position: relative; }
.tooltip-container .tooltip-text {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #222;
  color: var(--green);
  font-family: 'VT323', monospace;
  font-size: 14px;
  padding: 4px 8px;
  border: 1px solid #444;
  white-space: nowrap;
  z-index: 100;
  transition: opacity 0.2s;
  pointer-events: none;
}
.tooltip-container:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}