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

:root {
  --bg: #1a1a1a;
  --bezel: #2a2219;
  --panel: #3a3530;
  --panel-highlight: #5a5045;
  --text: #c8c0b0;
  --text-bright: #e8e0d0;
  --green-phosphor: #00ff00;
  --green-dim: #00aa00;
  --red: #cc2200;
  --amber: #ccaa00;
  --brown: #6b4c2a;
  --woodgrain: #8b6914;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#app {
  max-width: 780px;
  width: 100%;
  padding: 10px;
}

#header {
  text-align: center;
  margin: 10px 0 8px;
  position: relative;
}

.rainbow-bar {
  height: 4px;
  background: linear-gradient(90deg, #ff0000, #ff8800, #ffff00, #00ff00, #0088ff, #8800ff);
  border-radius: 2px;
  margin-bottom: 8px;
}

#header h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 22px;
  color: var(--text-bright);
  letter-spacing: 2px;
  text-shadow: 0 0 10px rgba(0,255,0,0.3);
}

.subtitle {
  font-size: 11px;
  color: #888;
  margin-top: 4px;
}

#monitor-frame {
  background: linear-gradient(145deg, #3a3530, #2a2520);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
  margin-bottom: 8px;
}

#monitor-frame::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--woodgrain), transparent);
  opacity: 0.4;
}

#crt-bezel {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 30px rgba(0,255,0,0.15), inset 0 0 60px rgba(0,0,0,0.8);
  line-height: 0;
}

#canvas {
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  display: block;
}

.scanlines {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 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-off .scanlines { display: none; }
.crt-off #crt-bezel { box-shadow: none; }

#control-panel {
  background: linear-gradient(180deg, #4a4540, #3a3530);
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.08);
  margin-bottom: 6px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.control-buttons { gap: 6px; }

.btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 700;
  border: none;
  border-radius: 4px;
  padding: 8px 14px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.1s;
  box-shadow: 0 3px 0 rgba(0,0,0,0.4), 0 1px 4px rgba(0,0,0,0.3);
}
.btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.4);
}

.btn-load {
  background: linear-gradient(180deg, #5a5550, #4a4540);
  color: var(--text-bright);
}
.btn-load:hover { background: linear-gradient(180deg, #6a6560, #5a5550); }

.btn-run {
  background: linear-gradient(180deg, #dd3322, #aa2211);
  color: #fff;
  min-width: 80px;
}
.btn-run:hover { background: linear-gradient(180deg, #ee4433, #cc3322); }
.btn-run.running {
  background: linear-gradient(180deg, #ddaa00, #aa8800);
  color: #222;
}

.btn-reset {
  background: linear-gradient(180deg, #555, #444);
  color: var(--text-bright);
}
.btn-reset:hover { background: linear-gradient(180deg, #666, #555); }

.btn-keyboard {
  background: linear-gradient(180deg, var(--brown), #5a3c1a);
  color: var(--text-bright);
  font-size: 11px;
  padding: 6px 10px;
}

.file-info {
  font-size: 11px;
  color: #888;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-info.loaded { color: var(--green-dim); }

.speed-label, .crt-toggle-label {
  font-size: 11px;
  color: #999;
}
.crt-toggle-label { display: flex; align-items: center; gap: 4px; cursor: pointer; }

.speed-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  background: #2a2520;
  color: var(--text);
  border: 1px solid #555;
  border-radius: 3px;
  padding: 4px 6px;
}

.speed-display {
  font-size: 11px;
  color: var(--green-dim);
  min-width: 60px;
}

#status-bar {
  background: #222;
  border-radius: 6px;
  padding: 6px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-size: 11px;
  border: 1px solid #333;
  margin-bottom: 6px;
}

.status-section {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
}

.status-label {
  color: #777;
  font-weight: 500;
}

.reg {
  color: var(--green-phosphor);
  font-weight: 700;
  font-size: 11px;
}

.cc-flags { letter-spacing: 1px; }

.run-state {
  font-weight: 700;
  font-size: 11px;
}
.run-state.stopped { color: var(--red); }
.run-state.running { color: var(--green-phosphor); animation: blink 1s infinite; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

#keyboard-toggle-area {
  text-align: center;
  margin-bottom: 6px;
}

#onscreen-keyboard {
  background: linear-gradient(180deg, var(--brown), #4a3210);
  border-radius: 8px;
  padding: 8px;
  display: grid;
  gap: 3px;
  margin-bottom: 8px;
}
#onscreen-keyboard.hidden { display: none; }

.kb-row {
  display: flex;
  gap: 3px;
  justify-content: center;
}

.kb-key {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  background: linear-gradient(180deg, #5a4020, #3a2810);
  color: #eee;
  border: 1px solid #6a5030;
  border-radius: 3px;
  padding: 6px 8px;
  min-width: 28px;
  text-align: center;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 2px 0 rgba(0,0,0,0.5);
}
.kb-key:active, .kb-key.pressed {
  transform: translateY(1px);
  box-shadow: none;
  background: #2a1800;
}
.kb-key.wide { min-width: 60px; }
.kb-key.space { min-width: 200px; }

footer {
  text-align: center;
  padding: 12px;
  font-size: 11px;
}
footer a {
  color: #666;
  text-decoration: none;
}
footer a:hover {
  color: var(--green-dim);
}

@media (max-width: 600px) {
  #app { padding: 6px; }
  #header h1 { font-size: 16px; }
  #monitor-frame { padding: 10px; border-radius: 10px; }
  #control-panel { padding: 8px; gap: 6px; }
  .btn { padding: 6px 10px; font-size: 11px; }
  #status-bar { font-size: 10px; padding: 4px 8px; }
  .reg { font-size: 10px; }
}