:root {
  --bg: #0a0a0a;
  --bg2: #111;
  --bg3: #1a1a1a;
  --fg: #00ff41;
  --fg-dim: #00aa2a;
  --accent: #00e5ff;
  --amber: #ffb000;
  --red: #ff3355;
  --border: #222;
  --glow: 0 0 10px rgba(0, 255, 65, 0.3);
  --font-pixel: 'Press Start 2P', monospace;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  min-height: 100vh;
  overflow-x: hidden;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px;
}

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

header h1 {
  font-family: var(--font-pixel);
  font-size: clamp(14px, 3vw, 24px);
  color: var(--fg);
  text-shadow: var(--glow), 0 0 30px rgba(0, 255, 65, 0.15);
  letter-spacing: 2px;
  margin-bottom: 6px;
}

.subtitle {
  font-size: clamp(9px, 1.5vw, 12px);
  color: var(--fg-dim);
  font-family: var(--font-mono);
  font-weight: 300;
}

#main-layout {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

#left-col {
  flex: 1;
  min-width: 0;
}

/* Drop Zone */
#drop-zone {
  border: 2px dashed var(--fg-dim);
  border-radius: 12px;
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  margin: 12px 0;
  background: rgba(0, 255, 65, 0.02);
  animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--fg-dim); }
  50% { border-color: var(--fg); box-shadow: var(--glow); }
}

#drop-zone:hover, #drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0, 229, 255, 0.05);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.drop-icon { font-size: 36px; margin-bottom: 8px; }
.drop-text { font-family: var(--font-pixel); font-size: 11px; margin-bottom: 4px; }
.drop-subtext { font-size: 10px; color: #555; }

/* ROM Info */
#rom-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  background: var(--bg2);
  border-radius: 6px;
  font-size: 11px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

#rom-info.hidden { display: none; }

#rom-name { color: var(--accent); font-weight: 700; }
#rom-size { color: #666; }
#rom-mode-badge {
  background: var(--fg-dim);
  color: var(--bg);
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
}

/* Canvas */
#canvas-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 8px 0;
  position: relative;
}

#crt-bezel {
  position: relative;
  border-radius: 12px;
  padding: 8px;
  background: linear-gradient(145deg, #1a1a1a, #0d0d0d);
  box-shadow: inset 0 0 30px rgba(0,0,0,0.8), 0 4px 20px rgba(0,0,0,0.6), 0 0 2px var(--fg-dim);
  overflow: hidden;
}

#canvas {
  display: block;
  border-radius: 4px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: min(100%, 640px);
  height: auto;
  aspect-ratio: 2/1;
  background: #000;
}

.scanline-overlay {
  position: absolute;
  top: 8px; left: 8px; right: 8px; bottom: 8px;
  border-radius: 4px;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
  z-index: 2;
}

#fps-counter {
  position: absolute;
  top: 14px; right: 14px;
  font-size: 9px;
  color: var(--amber);
  font-family: var(--font-mono);
  z-index: 5;
  background: rgba(0,0,0,0.6);
  padding: 2px 6px;
  border-radius: 3px;
}

#fps-counter.hidden { display: none; }

/* Controls */
#controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  margin: 8px 0;
}

.ctrl-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  background: var(--bg3);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.ctrl-btn:hover {
  background: #252525;
  border-color: var(--fg-dim);
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.15);
}

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

.ctrl-btn.active {
  background: var(--fg-dim);
  color: var(--bg);
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.speed-control label { cursor: default; }

#speed-slider {
  width: 80px;
  accent-color: var(--fg);
}

#speed-val {
  color: var(--amber);
  font-size: 11px;
  min-width: 24px;
}

/* Settings */
#settings-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin: 6px 0;
  font-size: 11px;
}

.setting-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.setting-group label { color: #666; }

.setting-group select, .setting-group input[type="color"] {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg3);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
}

.setting-group input[type="color"] {
  width: 28px; height: 24px;
  padding: 1px;
  cursor: pointer;
}

/* Quirks */
#quirks-row { margin: 6px 0; }

.quirks-toggle { font-size: 11px !important; }

#quirks-panel {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 0;
  font-size: 11px;
}

#quirks-panel.hidden { display: none; }

#quirks-panel label {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #888;
  cursor: pointer;
}

#quirks-panel input[type="checkbox"] { accent-color: var(--fg); }

/* Keypad */
#keypad {
  margin: 12px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.keypad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  max-width: 280px;
  width: 100%;
}

.key-btn {
  font-family: var(--font-pixel);
  font-size: 14px;
  padding: 14px 0;
  background: var(--bg3);
  color: var(--fg);
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.1s;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.key-btn:hover { border-color: var(--fg-dim); }

.key-btn.pressed {
  background: var(--fg);
  color: var(--bg);
  box-shadow: 0 0 15px rgba(0, 255, 65, 0.4);
  transform: scale(0.95);
}

.keymap-hint {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  font-size: 9px;
  color: #444;
  flex-wrap: wrap;
  justify-content: center;
}

/* Gallery */
#gallery {
  margin: 16px 0;
}

#gallery h3 {
  font-family: var(--font-pixel);
  font-size: 11px;
  margin-bottom: 10px;
  color: var(--amber);
}

#gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}

.gallery-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.gallery-item:hover {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.15);
}

.gallery-item .rom-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.gallery-item .rom-type {
  font-size: 8px;
  color: #555;
  text-transform: uppercase;
}

/* Debug Panel */
#debug-panel {
  width: 320px;
  min-width: 280px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  max-height: 80vh;
  overflow-y: auto;
  font-size: 10px;
}

#debug-panel.hidden { display: none; }

#debug-panel h3 {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: var(--amber);
  margin-bottom: 10px;
}

#debug-panel h4 {
  font-size: 10px;
  color: var(--accent);
  margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
}

.debug-section { margin-bottom: 12px; }

.mono-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
}

.mono-grid .reg {
  color: #666;
}

.mono-grid .val {
  color: var(--fg);
}

.mono-text {
  font-family: var(--font-mono);
  font-size: 10px;
  white-space: pre;
  color: #888;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.5;
}

.mono-text .current-line {
  background: rgba(0, 255, 65, 0.1);
  color: var(--fg);
}

.debug-controls {
  display: flex;
  gap: 6px;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px 10px;
  font-size: 10px;
  color: #444;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  margin-left: 12px;
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Responsive */
@media (max-width: 768px) {
  #main-layout { flex-direction: column; }
  #debug-panel { width: 100%; max-height: 50vh; }
  #canvas { width: 100%; }
  .keypad-grid { max-width: 260px; }
  .key-btn { padding: 12px 0; font-size: 12px; }
  header h1 { font-size: 14px; }
}

.hidden { display: none !important; }