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

:root {
  --bg: #111111;
  --panel-bg: #1a1a1a;
  --panel-border: #333;
  --bezel: #2a2418;
  --bezel-light: #3d3428;
  --green: #33ff33;
  --green-dim: #1a8a1a;
  --green-glow: rgba(51, 255, 51, 0.4);
  --red: #ff4444;
  --yellow: #ffcc00;
  --text: #aaaaaa;
  --text-bright: #dddddd;
  --btn-bg: #333;
  --btn-hover: #555;
  --btn-active: #1a8a1a;
  --font-display: 'VT323', monospace;
  --font-mono: 'Share Tech Mono', 'Courier New', monospace;
}

html { font-size: 14px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  min-height: 100vh;
  overflow-x: hidden;
}

#app {
  max-width: 960px;
  margin: 0 auto;
  padding: 10px;
}

/* Header */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 10px;
}
.header-left { display: flex; align-items: center; gap: 12px; }
.commodore-logo {
  width: 36px; height: 36px;
  background: var(--bezel-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid #555;
}
.chevron {
  width: 0; height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 14px solid var(--green);
  transform: rotate(-15deg);
}
h1 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--text-bright);
  letter-spacing: 2px;
}
.subtitle {
  font-size: 0.75rem;
  color: #666;
  letter-spacing: 1px;
}
.header-right {
  display: flex; align-items: center; gap: 6px;
}
.power-led {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #222;
  border: 1px solid #444;
  transition: all 0.3s;
}
.power-led.on {
  background: var(--green);
  box-shadow: 0 0 8px var(--green-glow), 0 0 16px var(--green-glow);
}
.led-label { font-size: 0.7rem; color: #666; }

/* CRT */
#crt-container {
  display: flex; justify-content: center;
  padding: 10px 0;
}
#crt-bezel {
  background: var(--bezel);
  border-radius: 24px;
  padding: 20px 24px;
  box-shadow: 0 0 40px rgba(0,0,0,0.8), inset 0 2px 4px rgba(255,255,255,0.05);
  border: 2px solid var(--bezel-light);
}
#crt-inner {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 0 30px var(--green-glow), 0 0 60px rgba(51,255,51,0.15), inset 0 0 60px rgba(0,0,0,0.5);
}
#screen {
  display: block;
  width: 640px;
  height: 400px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.scanlines {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.15) 1px,
    rgba(0,0,0,0.15) 2px
  );
}

/* Control Panel */
#control-panel {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  margin: 8px 0;
  flex-wrap: wrap;
}
.ctrl-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--btn-bg);
  color: var(--text-bright);
  border: 1px solid #555;
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.ctrl-btn:hover { background: var(--btn-hover); }
.ctrl-btn:active, .ctrl-btn.active { background: var(--btn-active); color: #fff; border-color: var(--green); }
.ctrl-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.power-btn.on { background: var(--green-dim); border-color: var(--green); color: #fff; }
.ctrl-group {
  display: flex; align-items: center; gap: 4px;
}
.ctrl-group label { font-size: 0.75rem; color: #888; }
.ctrl-group select, .ctrl-group input[type="range"] {
  font-family: var(--font-mono);
  background: #222;
  color: var(--text-bright);
  border: 1px solid #555;
  border-radius: 3px;
  padding: 2px 4px;
  font-size: 0.8rem;
}
#speedSlider { width: 60px; }
#speedLabel { font-size: 0.75rem; color: var(--green); min-width: 28px; }
.status-leds {
  display: flex; gap: 10px; margin-left: auto;
}
.led-group {
  display: flex; align-items: center; gap: 3px;
  font-size: 0.65rem; color: #666;
}
.led {
  width: 8px; height: 8px; border-radius: 50%;
  background: #222; border: 1px solid #444;
  transition: all 0.2s;
}
.led.green.on { background: var(--green); box-shadow: 0 0 6px var(--green-glow); }
.led.red.on { background: var(--red); box-shadow: 0 0 6px rgba(255,68,68,0.5); }
.led.yellow.on { background: var(--yellow); box-shadow: 0 0 6px rgba(255,204,0,0.5); }

/* Panels */
#panels { margin: 8px 0; }
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  margin-bottom: 6px;
  overflow: hidden;
}
.panel-header {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-bright);
  background: #222;
  border-bottom: 1px solid var(--panel-border);
  user-select: none;
  transition: background 0.2s;
}
.panel-header:hover { background: #2a2a2a; }
.panel-body {
  display: none;
  padding: 10px 12px;
}
.panel-body.open { display: block; }

/* ROM Slots */
#romSlots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 6px;
  margin-bottom: 10px;
}
.rom-slot {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  background: #222;
  border: 1px solid #383838;
  border-radius: 4px;
  font-size: 0.72rem;
}
.rom-slot .rom-status {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #444;
  flex-shrink: 0;
}
.rom-slot .rom-status.loaded { background: var(--green); }
.rom-slot .rom-status.error { background: var(--red); }
.rom-slot .rom-label { flex: 1; color: #999; overflow: hidden; text-overflow: ellipsis; }
.rom-slot input[type="file"] { display: none; }
.rom-slot .rom-btn {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: var(--btn-bg);
  color: var(--text);
  border: 1px solid #555;
  border-radius: 3px;
  padding: 2px 6px;
  cursor: pointer;
}
.rom-slot .rom-btn:hover { background: var(--btn-hover); }
.rom-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.file-btn { position: relative; }

/* Tabs */
.tab-bar { display: flex; gap: 2px; margin-bottom: 8px; flex-wrap: wrap; }
.tab-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: #222;
  color: #888;
  border: 1px solid var(--panel-border);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  padding: 5px 10px;
  cursor: pointer;
}
.tab-btn.active { background: var(--panel-bg); color: var(--green); border-color: #555; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.info-box {
  background: #222;
  border: 1px solid #383838;
  border-radius: 4px;
  padding: 6px 8px;
  margin: 6px 0;
  font-size: 0.75rem;
  color: var(--green);
  min-height: 20px;
}
.prg-actions { display: flex; gap: 6px; }
.tape-deck { display: flex; gap: 16px; padding: 6px 0; font-size: 0.75rem; color: #888; }
.tape-controls { display: flex; gap: 6px; }
.disk-info { font-size: 0.75rem; color: #888; padding: 6px 0; }
.disk-info select {
  font-family: var(--font-mono);
  background: #222; color: var(--text-bright);
  border: 1px solid #555; border-radius: 3px;
  padding: 1px 3px; font-size: 0.75rem;
}

/* Debug */
#cpuRegs {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--green);
  padding: 6px 0;
  letter-spacing: 1px;
}
.debug-controls { display: flex; gap: 6px; margin: 6px 0; }
.mem-inspect { display: flex; align-items: center; gap: 4px; margin: 6px 0; font-size: 0.8rem; }
.hex-input {
  font-family: var(--font-mono);
  width: 50px;
  background: #222; color: var(--green);
  border: 1px solid #555;
  border-radius: 3px;
  padding: 3px 5px;
  font-size: 0.8rem;
  text-transform: uppercase;
}
.mem-dump, .disasm {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--green);
  background: #0a0a0a;
  border: 1px solid #333;
  border-radius: 4px;
  padding: 6px 8px;
  white-space: pre;
  overflow-x: auto;
  max-height: 120px;
  line-height: 1.3;
}

/* Keyboard */
#keyboard {
  background: #2a2622;
  border: 2px solid #3d3428;
  border-radius: 10px;
  padding: 10px;
  margin: 8px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-x: auto;
}
.kb-row {
  display: flex;
  gap: 3px;
  align-items: center;
}
.kb-separator {
  width: 10px;
  flex-shrink: 0;
}
.kb-key {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  min-width: 32px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #d4d0c8;
  color: #222;
  border: 1px solid #999;
  border-radius: 3px;
  cursor: pointer;
  user-select: none;
  padding: 0 4px;
  transition: all 0.1s;
  white-space: nowrap;
  flex-shrink: 0;
}
.kb-key:hover { background: #bbb; }
.kb-key:active, .kb-key.pressed {
  background: #888;
  color: #fff;
  transform: translateY(1px);
}
.kb-key.wide { min-width: 52px; }
.kb-key.wider { min-width: 72px; }
.kb-key.space { min-width: 160px; }
.kb-key.shift-active { background: var(--green); color: #000; }

/* Footer */
footer {
  text-align: center;
  padding: 12px;
  font-size: 0.65rem;
  color: #444;
  border-top: 1px solid #222;
  margin-top: 10px;
}
footer a { color: #555; text-decoration: none; margin-left: 12px; }
footer a:hover { color: var(--green); }

/* Responsive */
@media (max-width: 700px) {
  #screen { width: 320px; height: 200px; }
  #crt-bezel { padding: 10px 12px; border-radius: 14px; }
  h1 { font-size: 1.2rem; }
  #keyboard { overflow-x: auto; }
  .kb-key { min-width: 26px; height: 24px; font-size: 0.55rem; }
  .kb-key.space { min-width: 100px; }
}

/* CRT power on animation */
@keyframes crtOn {
  0% { filter: brightness(5) saturate(0); }
  30% { filter: brightness(2) saturate(0.5); }
  100% { filter: brightness(1) saturate(1); }
}
#crt-inner.powering-on {
  animation: crtOn 0.6s ease-out;
}