:root {
  --phosphor: #33ff33;
  --phosphor-dim: #1a8c1a;
  --phosphor-bright: #66ff66;
  --amber: #ffb000;
  --amber-dim: #996800;
  --cyan: #00ffff;
  --bg: #0a0a0a;
  --panel-bg: #111111;
  --panel-border: #1a331a;
  --text-dim: #226622;
}

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

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

#crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  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
  );
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 4px var(--phosphor), 0 0 8px var(--phosphor); opacity: 1; }
  50% { box-shadow: 0 0 8px var(--phosphor-bright), 0 0 20px var(--phosphor); opacity: 0.8; }
}

@keyframes flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.8; }
  97% { opacity: 1; }
  98% { opacity: 0.85; }
}

@keyframes boot-text {
  0% { opacity: 0; transform: translateY(4px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes register-update {
  0% { background: var(--phosphor); color: var(--bg); }
  100% { background: transparent; color: var(--phosphor); }
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  position: relative;
}

.panel::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px; bottom: -1px;
  border: 1px solid rgba(51, 255, 51, 0.05);
  pointer-events: none;
}

.glow-text {
  text-shadow: 0 0 6px var(--phosphor), 0 0 12px rgba(51, 255, 51, 0.3);
}

.glow-amber {
  text-shadow: 0 0 6px var(--amber), 0 0 12px rgba(255, 176, 0, 0.3);
  color: var(--amber);
}

.glow-cyan {
  text-shadow: 0 0 6px var(--cyan), 0 0 12px rgba(0, 255, 255, 0.3);
  color: var(--cyan);
}

.led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.led-on {
  background: var(--phosphor);
  animation: pulse-glow 1.5s ease-in-out infinite;
}

.led-off {
  background: #1a2a1a;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.5);
}

.led-amber-on {
  background: var(--amber);
  box-shadow: 0 0 4px var(--amber), 0 0 8px var(--amber);
}

.flag-indicator {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--panel-border);
  transition: all 0.15s;
}

.flag-on {
  background: var(--phosphor);
  color: var(--bg);
  box-shadow: 0 0 6px var(--phosphor);
  border-color: var(--phosphor);
}

.flag-off {
  background: #0a1a0a;
  color: var(--text-dim);
}

.mem-cell {
  cursor: pointer;
  padding: 1px 3px;
  font-size: 11px;
  transition: background 0.1s;
  font-family: 'JetBrains Mono', monospace;
}

.mem-cell:hover {
  background: rgba(51, 255, 51, 0.15);
}

.mem-cell-reset {
  background: rgba(255, 176, 0, 0.2) !important;
  color: var(--amber) !important;
  text-shadow: 0 0 4px var(--amber);
}

.mem-cell-pc {
  background: rgba(0, 255, 255, 0.15) !important;
  color: var(--cyan) !important;
  text-shadow: 0 0 4px var(--cyan);
}

.mem-cell-edited {
  animation: register-update 0.5s ease-out;
}

.btn-arcade {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 10px 16px;
  border: 2px solid var(--phosphor);
  background: transparent;
  color: var(--phosphor);
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s;
  position: relative;
  letter-spacing: 1px;
}

.btn-arcade:hover {
  background: var(--phosphor);
  color: var(--bg);
  box-shadow: 0 0 12px var(--phosphor), 0 0 24px rgba(51, 255, 51, 0.2);
}

.btn-arcade:active {
  transform: scale(0.96);
}

.btn-arcade.btn-red {
  border-color: #ff3333;
  color: #ff3333;
}
.btn-arcade.btn-red:hover {
  background: #ff3333;
  color: var(--bg);
  box-shadow: 0 0 12px #ff3333;
}

.btn-arcade.btn-amber {
  border-color: var(--amber);
  color: var(--amber);
}
.btn-arcade.btn-amber:hover {
  background: var(--amber);
  color: var(--bg);
  box-shadow: 0 0 12px var(--amber);
}

.btn-arcade.btn-cyan {
  border-color: var(--cyan);
  color: var(--cyan);
}
.btn-arcade.btn-cyan:hover {
  background: var(--cyan);
  color: var(--bg);
  box-shadow: 0 0 12px var(--cyan);
}

.speed-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--panel-border);
  border-radius: 2px;
  outline: none;
}

.speed-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--phosphor);
  cursor: pointer;
  box-shadow: 0 0 6px var(--phosphor);
}

.log-entry {
  animation: boot-text 0.15s ease-out;
}

.tooltip-content {
  background: #1a1a1a;
  border: 1px solid var(--phosphor-dim);
  color: var(--phosphor);
  font-size: 11px;
  padding: 8px 12px;
  max-width: 280px;
  position: absolute;
  z-index: 100;
  pointer-events: none;
  line-height: 1.5;
}

select {
  font-family: 'JetBrains Mono', monospace;
  background: var(--panel-bg);
  color: var(--phosphor);
  border: 1px solid var(--panel-border);
  padding: 6px 10px;
  font-size: 11px;
  outline: none;
  cursor: pointer;
}

select:focus {
  border-color: var(--phosphor-dim);
}

input[type="text"] {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg);
  color: var(--phosphor);
  border: 1px solid var(--panel-border);
  padding: 2px 4px;
  font-size: 11px;
  outline: none;
  width: 24px;
  text-align: center;
  text-transform: uppercase;
}

input[type="text"]:focus {
  border-color: var(--phosphor);
  box-shadow: 0 0 4px var(--phosphor);
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--panel-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--phosphor-dim);
}

@media (max-width: 768px) {
  .mem-cell { font-size: 9px; padding: 1px 2px; }
  .btn-arcade { font-size: 8px; padding: 8px 12px; }
}