:root {
  --bg-dark: #0d0d1a;
  --bg-panel: #1a1a2e;
  --bg-panel-inner: #16213e;
  --border-color: #2a2a4a;
  --text-primary: #e0e0ff;
  --text-secondary: #8888aa;
  --text-accent: #ffcc00;
  --bezel-outer: #8b7355;
  --bezel-inner: #6b5535;
  --crt-glow: rgba(100, 255, 100, 0.08);
  --key-bg: #d4c5a0;
  --key-border: #a0926e;
  --key-text: #2a2a2a;
  --key-pressed: #b0a080;
  --rainbow-red: #e04040;
  --rainbow-orange: #e08040;
  --rainbow-yellow: #e0c040;
  --rainbow-green: #40b040;
  --green-check: #4ae04a;
  --red-x: #e04a4a;
}

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

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 50% 0%, rgba(40,40,80,0.3) 0%, transparent 60%),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.005) 2px, rgba(255,255,255,0.005) 4px);
}

#header {
  text-align: center;
  padding: 16px 20px 10px;
}

.rainbow-bar {
  height: 6px;
  background: linear-gradient(90deg, var(--rainbow-red) 0%, var(--rainbow-red) 25%, var(--rainbow-orange) 25%, var(--rainbow-orange) 50%, var(--rainbow-yellow) 50%, var(--rainbow-yellow) 75%, var(--rainbow-green) 75%, var(--rainbow-green) 100%);
  border-radius: 3px;
  margin-bottom: 12px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

#header h1 {
  font-family: 'Press Start 2P', cursive;
  font-size: 20px;
  color: var(--text-accent);
  text-shadow: 0 0 20px rgba(255,204,0,0.3);
  letter-spacing: 2px;
}

.subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

#main-layout {
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: flex-start;
}

#left-panel, #right-panel {
  width: 240px;
  flex-shrink: 0;
}

#center-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 12px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
}

.panel h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-accent);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.rom-slot {
  margin-bottom: 8px;
}

.rom-slot label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  padding: 6px 8px;
  background: var(--bg-panel-inner);
  border-radius: 4px;
  border: 1px solid var(--border-color);
  transition: border-color 0.2s;
}

.rom-slot label:hover {
  border-color: var(--text-accent);
}

.rom-slot input[type="file"] {
  display: none;
}

.rom-status {
  font-size: 14px;
  color: var(--red-x);
  font-weight: bold;
}

.rom-status.loaded {
  color: var(--green-check);
}

.rom-hint {
  display: block;
  font-size: 9px;
  color: var(--text-secondary);
  margin-left: 24px;
  margin-top: 2px;
}

.rom-buttons {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.rom-buttons button {
  flex: 1;
  padding: 8px;
  border: none;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

#power-btn {
  background: linear-gradient(180deg, #3a6e3a, #2a4e2a);
  color: #aaffaa;
  border: 1px solid #4a8e4a;
}

#power-btn:disabled {
  background: linear-gradient(180deg, #3a3a3a, #2a2a2a);
  color: #666;
  border-color: #444;
  cursor: not-allowed;
}

#power-btn:not(:disabled):hover {
  background: linear-gradient(180deg, #4a8e4a, #3a6e3a);
  box-shadow: 0 0 10px rgba(100,255,100,0.3);
}

#power-btn.running {
  background: linear-gradient(180deg, #6e3a3a, #4e2a2a);
  color: #ffaaaa;
  border-color: #8e4a4a;
}

#reset-btn {
  background: linear-gradient(180deg, #5a5a3a, #4a4a2a);
  color: #ddddaa;
  border: 1px solid #7a7a4a;
}

#reset-btn:disabled {
  background: linear-gradient(180deg, #3a3a3a, #2a2a2a);
  color: #666;
  border-color: #444;
  cursor: not-allowed;
}

#reset-btn:not(:disabled):hover {
  background: linear-gradient(180deg, #7a7a4a, #5a5a3a);
}

.storage-slot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding: 6px;
  background: var(--bg-panel-inner);
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.storage-icon {
  font-size: 18px;
}

.storage-slot label {
  font-size: 11px;
  cursor: pointer;
  flex: 1;
}

.storage-slot input[type="file"] {
  display: none;
}

.file-name {
  width: 100%;
  font-size: 9px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tape-controls {
  display: flex;
  gap: 4px;
  width: 100%;
  margin-top: 4px;
}

.tape-btn {
  flex: 1;
  padding: 3px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 3px;
  cursor: pointer;
  font-size: 10px;
}

.tape-btn.active {
  color: var(--green-check);
  border-color: var(--green-check);
}

.tape-btn:hover {
  border-color: var(--text-accent);
}

#speed-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

#speed-panel h2 {
  width: 100%;
}

#speed-slider {
  flex: 1;
  accent-color: var(--text-accent);
}

#speed-value {
  font-size: 12px;
  color: var(--text-accent);
  min-width: 40px;
  text-align: right;
}

/* CRT Bezel */
#crt-bezel {
  background: linear-gradient(160deg, #a89070, #7a6545, #5a4a30);
  padding: 20px 24px;
  border-radius: 16px;
  box-shadow:
    0 4px 20px rgba(0,0,0,0.5),
    inset 0 2px 4px rgba(255,255,255,0.1),
    inset 0 -2px 4px rgba(0,0,0,0.3);
  position: relative;
}

#crt-screen {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow:
    inset 0 0 30px rgba(0,0,0,0.8),
    0 0 15px var(--crt-glow);
  line-height: 0;
}

#screen {
  width: 100%;
  max-width: 768px;
  height: auto;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  display: block;
}

#scanline-overlay {
  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;
}

/* Keyboard */
#keyboard-container {
  margin-top: 12px;
  width: 100%;
  max-width: 820px;
}

#keyboard {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px;
  background: linear-gradient(160deg, #c4b08a, #a89070);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

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

.key {
  min-width: 36px;
  height: 32px;
  background: linear-gradient(180deg, var(--key-bg), #c0b090);
  border: 1px solid var(--key-border);
  border-radius: 4px;
  color: var(--key-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 2px 0 #8a7a5e, 0 3px 4px rgba(0,0,0,0.3);
  transition: all 0.05s;
  text-align: center;
  padding: 0 4px;
}

.key:active, .key.pressed {
  background: var(--key-pressed);
  box-shadow: 0 0 0 #8a7a5e, 0 1px 2px rgba(0,0,0,0.3);
  transform: translateY(2px);
}

.key.wide { min-width: 54px; }
.key.wider { min-width: 72px; }
.key.space { min-width: 240px; }
.key.special {
  background: linear-gradient(180deg, #8a7a5e, #6a5a3e);
  color: #e0d8c0;
}

/* Status Bar */
#status-bar {
  display: flex;
  gap: 16px;
  padding: 8px 12px;
  margin-top: 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 10px;
  color: var(--text-secondary);
  flex-wrap: wrap;
  width: 100%;
  max-width: 820px;
  justify-content: center;
}

#status-bar span {
  white-space: nowrap;
}

/* Debug Panel */
#debug-content {
  max-height: 500px;
  overflow-y: auto;
}

.toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 3px;
  cursor: pointer;
  font-size: 10px;
  padding: 2px 6px;
}

#reg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
}

#reg-table th {
  text-align: left;
  padding: 3px 4px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-accent);
  font-weight: 500;
}

#reg-table td {
  padding: 2px 4px;
  border-bottom: 1px solid rgba(42,42,74,0.5);
  font-variant-numeric: tabular-nums;
}

.reg-hex { color: #7ec8e3; }
.reg-bin { color: #92df87; font-size: 9px; }

/* Footer */
footer {
  text-align: center;
  padding: 16px;
  font-size: 10px;
  color: var(--text-secondary);
}

footer a {
  color: var(--text-accent);
  text-decoration: none;
  margin-bottom: 4px;
  display: inline-block;
}

footer a:hover { text-decoration: underline; }

footer p { margin-top: 4px; font-size: 9px; }

/* Responsive */
@media (max-width: 1100px) {
  #right-panel { display: none; }
}

@media (max-width: 860px) {
  #main-layout {
    flex-direction: column;
    align-items: center;
  }
  #left-panel {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }
  #left-panel .panel { flex: 1; min-width: 200px; margin-bottom: 0; }
  #crt-bezel { padding: 12px 14px; }
  .key { min-width: 28px; height: 28px; font-size: 8px; }
  .key.wide { min-width: 42px; }
  .key.wider { min-width: 56px; }
  .key.space { min-width: 160px; }
}

@media (max-width: 500px) {
  .key { min-width: 22px; height: 24px; font-size: 7px; }
  .key.wide { min-width: 34px; }
  .key.wider { min-width: 44px; }
  .key.space { min-width: 120px; }
  .key-row { gap: 2px; }
  #keyboard { padding: 6px; gap: 2px; }
}