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

:root {
  --green: #00ff41;
  --green-dim: #00aa2a;
  --green-dark: #004d15;
  --amber: #ffb000;
  --red: #ff2442;
  --cyan: #00e5ff;
  --bg: #0a0a0a;
  --bg-panel: #111111;
  --bg-input: #1a1a1a;
  --border: #222;
  --text: #cccccc;
  --glow: 0 0 10px rgba(0, 255, 65, 0.3);
  --glow-strong: 0 0 20px rgba(0, 255, 65, 0.5), 0 0 40px rgba(0, 255, 65, 0.2);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'VT323', 'Courier New', monospace;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

#app { max-width: 1200px; margin: 0 auto; padding: 10px; }

header {
  text-align: center;
  padding: 15px 10px;
  border-bottom: 2px solid var(--green-dark);
  margin-bottom: 20px;
  position: relative;
}
header h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(10px, 2.5vw, 18px);
  color: var(--green);
  text-shadow: var(--glow);
  letter-spacing: 2px;
  line-height: 1.5;
}
header .dash { color: var(--amber); }
header .subtitle {
  margin-top: 8px;
  font-size: 15px;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.4);
  letter-spacing: 2px;
}
.badge {
  position: absolute; top: 10px; right: 10px;
  font-size: 11px; color: var(--green-dim);
  font-family: 'VT323', monospace;
}

#main-container { display: flex; flex-direction: column; align-items: center; gap: 20px; }

#rom-panel {
  background: var(--bg-panel);
  border: 2px solid var(--green-dark);
  border-radius: 8px;
  padding: 24px;
  width: 100%; max-width: 700px;
  box-shadow: var(--glow);
}
#rom-panel h2 {
  font-family: 'Press Start 2P', monospace;
  font-size: 14px; color: var(--green);
  text-shadow: var(--glow); margin-bottom: 8px; text-align: center;
}
.rom-instructions { text-align: center; color: var(--green-dim); font-size: 14px; margin-bottom: 16px; }

#rom-slots { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.rom-slot { background: var(--bg-input); border: 1px solid var(--border); border-radius: 6px; padding: 10px; }
.rom-label { font-family: 'Press Start 2P', monospace; font-size: 10px; color: var(--green); margin-bottom: 6px; }
.rom-addr { color: var(--green-dim); font-size: 9px; }
.rom-dropzone {
  border: 1px dashed var(--green-dark); border-radius: 4px; padding: 12px 8px;
  text-align: center; cursor: pointer; transition: all 0.2s; position: relative;
  min-height: 50px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.rom-dropzone:hover, .rom-dropzone.dragover {
  border-color: var(--green); background: rgba(0, 255, 65, 0.05);
  box-shadow: inset 0 0 15px rgba(0, 255, 65, 0.1);
}
.rom-dropzone.loaded { border-color: var(--green); border-style: solid; background: rgba(0, 255, 65, 0.08); }
.rom-status { font-size: 18px; }
.rom-text { font-size: 12px; color: var(--green-dim); }
.rom-input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.rom-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  font-family: 'Press Start 2P', monospace; font-size: 11px; padding: 10px 18px;
  border: none; border-radius: 4px; cursor: pointer; transition: all 0.15s;
  text-transform: uppercase; letter-spacing: 1px; user-select: none;
  -webkit-user-select: none; touch-action: manipulation;
}
.btn-primary { background: var(--green-dark); color: var(--green); border: 2px solid var(--green); box-shadow: var(--glow); }
.btn-primary:not(:disabled):hover { background: var(--green); color: #000; box-shadow: var(--glow-strong); }
.btn-primary:disabled { opacity: 0.3; cursor: not-allowed; box-shadow: none; }
.btn-primary:not(:disabled) { animation: glow-pulse 2s ease-in-out infinite; }
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 10px rgba(0,255,65,0.3); }
  50% { box-shadow: 0 0 25px rgba(0,255,65,0.6), 0 0 50px rgba(0,255,65,0.3); }
}
.btn-secondary { background: var(--bg-input); color: var(--green); border: 1px solid var(--green-dark); }
.btn-secondary:hover { background: var(--green-dark); }
.btn-coin { background: #332200; color: var(--amber); border: 2px solid var(--amber); font-size: 12px; padding: 12px 20px; }
.btn-coin:active { transform: translateY(2px); box-shadow: none; }
.btn-start-game { background: #220011; color: var(--red); border: 2px solid var(--red); font-size: 11px; padding: 12px 16px; }
.btn-start-game:active { transform: translateY(2px); }
.btn-move, .btn-fire {
  background: var(--bg-input); color: var(--green); border: 2px solid var(--green-dark);
  font-size: 13px; padding: 14px 22px; border-bottom-width: 4px;
}
.btn-fire { border-color: var(--red); color: var(--red); }
.btn-move:active, .btn-fire:active { transform: translateY(2px); border-bottom-width: 2px; }

#screen-container { width: 100%; max-width: 560px; display: flex; flex-direction: column; align-items: center; }
#screen-bezel {
  background: #000; border: 4px solid #1a1a1a; border-radius: 12px; padding: 16px;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.8), 0 0 30px rgba(0,255,65,0.1);
  width: 100%; display: flex; justify-content: center;
}
#crt-wrapper { position: relative; width: 100%; aspect-ratio: 224 / 256; max-width: 448px; }
#canvas {
  width: 100%; height: 100%;
  image-rendering: pixelated; image-rendering: -moz-crisp-edges; image-rendering: crisp-edges;
  display: block; background: #000;
}
#scanlines {
  position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg, transparent 0px, transparent 1px, rgba(0,0,0,0.15) 1px, rgba(0,0,0,0.15) 2px);
  mix-blend-mode: multiply;
}
#scanlines.disabled { display: none; }
#crt-wrapper.crt-effect { filter: contrast(1.1) brightness(1.05); border-radius: 8px; overflow: hidden; box-shadow: inset 0 0 80px rgba(0,0,0,0.4); }
#stats-bar { display: flex; gap: 16px; padding: 8px; font-size: 13px; color: var(--green-dim); width: 100%; justify-content: center; flex-wrap: wrap; }
#audio-display { color: var(--cyan); }

#controls-panel { width: 100%; max-width: 560px; }
#game-controls { display: flex; flex-direction: column; gap: 10px; align-items: center; }
.control-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
#keyboard-map { margin-top: 16px; padding: 12px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 6px; }
#keyboard-map h3 { font-family: 'Press Start 2P', monospace; font-size: 10px; color: var(--green-dim); margin-bottom: 8px; text-align: center; }
.key-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; font-size: 13px; }
kbd { background: var(--bg-input); border: 1px solid var(--green-dark); border-radius: 3px; padding: 1px 5px; font-family: 'VT323', monospace; color: var(--green); font-size: 14px; }

#settings-panel { width: 100%; max-width: 560px; }
.settings-group { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 6px; padding: 14px; }
.settings-group h3 { font-family: 'Press Start 2P', monospace; font-size: 10px; color: var(--green-dim); margin-bottom: 10px; }
.setting-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 14px; }
.setting-row label { min-width: 90px; color: var(--green-dim); }
.setting-row select { background: var(--bg-input); color: var(--green); border: 1px solid var(--green-dark); padding: 4px 8px; font-family: 'VT323', monospace; font-size: 14px; border-radius: 3px; }
.setting-row input[type="checkbox"] { accent-color: var(--green); width: 18px; height: 18px; }

/* ---- SN76477 PANEL ---- */
#sn76477-panel {
  margin-top: 12px;
  background: var(--bg-panel);
  border: 1px solid #003a44;
  border-radius: 6px;
  padding: 14px;
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.08);
}
#sn76477-panel h3 {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px; color: var(--cyan);
  margin-bottom: 6px;
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.4);
}
.sn-desc { font-size: 12px; color: #4a8a94; margin-bottom: 12px; line-height: 1.4; }

.sn-pins {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; margin-bottom: 12px;
}
.sn-led {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg-input); border: 1px solid #002b33;
  border-radius: 4px; padding: 5px 6px;
}
.sn-led .led {
  width: 10px; height: 10px; border-radius: 50%;
  background: #113;
  border: 1px solid #224;
  box-shadow: inset 0 0 3px #000;
  transition: all 0.1s;
  flex-shrink: 0;
}
.sn-led.on .led {
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan), 0 0 14px rgba(0,229,255,0.5);
  border-color: var(--cyan);
}
.led-label { font-size: 11px; color: #6aa; font-family: 'VT323', monospace; letter-spacing: 0.5px; }
.sn-led.on .led-label { color: var(--cyan); }

#scope {
  width: 100%;
  height: 80px;
  background: #000;
  border: 1px solid #003a44;
  border-radius: 4px;
  margin-bottom: 12px;
  display: block;
}

.sn-controls { display: flex; flex-direction: column; gap: 7px; }
.sn-slider-row { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.sn-slider-row label { min-width: 82px; color: var(--cyan); font-size: 12px; }
.sn-slider-row input[type="range"] { flex: 1; accent-color: var(--cyan); height: 5px; cursor: pointer; }
.sn-val { min-width: 62px; text-align: right; color: var(--cyan); font-family: 'VT323', monospace; font-size: 13px; }

.sn-btn-row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.btn-sn {
  background: #002028; color: var(--cyan); border: 2px solid var(--cyan);
  font-family: 'Press Start 2P', monospace; font-size: 10px; padding: 10px 14px;
  border-radius: 4px; cursor: pointer; transition: all 0.15s;
  text-shadow: 0 0 6px rgba(0,229,255,0.4);
  box-shadow: 0 0 8px rgba(0,229,255,0.12);
  flex: 1;
}
.btn-sn:hover { background: #003844; box-shadow: 0 0 18px rgba(0,229,255,0.4); }
.btn-sn:active { transform: translateY(2px); background: var(--cyan); color: #000; }

#debug-panel { margin-top: 12px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 6px; padding: 10px; }
#debug-panel summary { font-family: 'Press Start 2P', monospace; font-size: 9px; color: var(--amber); cursor: pointer; user-select: none; }
#debug-content { margin-top: 10px; }
#cpu-state {
  font-family: 'VT323', monospace; font-size: 13px; color: var(--green);
  background: #000; padding: 8px; border-radius: 4px; border: 1px solid var(--border);
  overflow-x: auto; white-space: pre; line-height: 1.5;
}

footer { text-align: center; padding: 20px 10px; margin-top: 30px; border-top: 1px solid var(--green-dark); }
footer a { color: var(--green-dim); text-decoration: none; font-family: 'Press Start 2P', monospace; font-size: 10px; letter-spacing: 1px; }
footer a:hover { color: var(--green); text-shadow: var(--glow); }

.hidden { display: none !important; }

@media (max-width: 600px) {
  #rom-slots { grid-template-columns: 1fr; }
  .key-grid { grid-template-columns: 1fr; }
  .sn-pins { grid-template-columns: repeat(2, 1fr); }
  .badge { position: static; margin-top: 4px; }
  .btn { font-size: 10px; padding: 8px 12px; }
}

@media (min-width: 900px) {
  #main-container {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 20px; align-items: start;
  }
  #rom-panel { grid-column: 1 / -1; }
  #screen-container { grid-column: 1; max-width: 100%; }
  #controls-panel { grid-column: 1; }
  #settings-panel { grid-column: 2; grid-row: 2 / 4; max-width: 320px; }
}