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

:root {
  --bg-deep: #0a0a1a;
  --bg-dark: #1a1a2e;
  --bg-mid: #16213e;
  --cyan: #00f0ff;
  --magenta: #ff00aa;
  --green: #00ff66;
  --amber: #ffaa00;
  --red: #ff3355;
  --text: #c8d6e5;
  --text-dim: #576574;
  --font-pixel: 'Press Start 2P', monospace;
  --font-mono: 'JetBrains Mono', monospace;
}

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

#app {
  max-width: 900px;
  margin: 0 auto;
  padding: 10px;
}

/* Header */
header {
  text-align: center;
  padding: 20px 10px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-deep) 100%);
  border-bottom: 2px solid var(--cyan);
}

header h1 {
  font-family: var(--font-pixel);
  font-size: clamp(14px, 4vw, 28px);
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(0,240,255,0.5), 0 0 40px rgba(0,240,255,0.2);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

header .subtitle {
  font-size: clamp(7px, 1.5vw, 11px);
  color: var(--magenta);
  font-family: var(--font-mono);
  opacity: 0.8;
}

.header-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.15) 2px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events: none;
}

/* ROM Slot */
.rom-slot {
  margin: 16px auto;
  max-width: 600px;
}

.slot-inner {
  border: 3px dashed var(--text-dim);
  border-radius: 8px;
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: all 0.3s;
  background: linear-gradient(135deg, rgba(26,26,46,0.8), rgba(10,10,26,0.8));
  animation: border-pulse 2s infinite;
}

@keyframes border-pulse {
  0%, 100% { border-color: var(--text-dim); }
  50% { border-color: var(--cyan); }
}

.slot-inner:hover, .slot-inner.dragover {
  border-color: var(--cyan);
  background: linear-gradient(135deg, rgba(0,240,255,0.05), rgba(255,0,170,0.05));
  box-shadow: 0 0 30px rgba(0,240,255,0.15);
}

.slot-inner.loaded {
  border-color: var(--green);
  border-style: solid;
  animation: none;
}

.led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #333;
  position: absolute;
  top: 10px;
  right: 14px;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.5);
}

.led.on {
  background: var(--green);
  box-shadow: 0 0 8px var(--green), inset 0 1px 2px rgba(255,255,255,0.3);
}

.insert-text {
  font-family: var(--font-pixel);
  font-size: clamp(10px, 2.5vw, 16px);
  color: var(--cyan);
  margin-bottom: 8px;
}

.blink-cursor {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.insert-sub {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.rom-info {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  min-height: 1.2em;
}

/* CRT Monitor */
#monitor {
  margin: 16px auto;
  max-width: 640px;
}

.crt-bezel {
  background: linear-gradient(145deg, #2a2a3a, #1a1a28);
  border-radius: 20px;
  padding: 18px 18px 10px;
  box-shadow:
    0 8px 32px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.3);
  position: relative;
}

.power-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  position: absolute;
  top: 8px;
  left: 18px;
  box-shadow: 0 0 4px var(--red);
  transition: all 0.3s;
}

.power-led.on {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.screen-container {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 256 / 192;
}

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

.scanline-overlay {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.2) 1px,
    rgba(0,0,0,0.2) 2px
  );
  pointer-events: none;
  z-index: 2;
}

.scanline-overlay.off {
  display: none;
}

.crt-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.5) 100%);
  pointer-events: none;
  z-index: 3;
}

.crt-powerup {
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  pointer-events: none;
  z-index: 4;
  transition: opacity 0.1s;
}

.crt-powerup.flash {
  animation: crt-on 0.5s forwards;
}

@keyframes crt-on {
  0% { opacity: 0.8; transform: scaleY(0.01); background: white; }
  30% { opacity: 0.6; transform: scaleY(0.01); }
  50% { opacity: 0.3; transform: scaleY(1); }
  100% { opacity: 0; transform: scaleY(1); }
}

.bezel-label {
  text-align: center;
  font-family: var(--font-pixel);
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 8px;
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* Controls */
#controls {
  margin: 12px auto;
  max-width: 640px;
}

.control-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.retro-btn {
  font-family: var(--font-pixel);
  font-size: 14px;
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: linear-gradient(180deg, #3a3a5c, #2a2a42);
  color: var(--text);
  box-shadow:
    0 4px 0 #1a1a2e,
    0 6px 12px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.1);
  transition: all 0.1s;
  user-select: none;
  -webkit-user-select: none;
}

.retro-btn:active {
  transform: translateY(3px);
  box-shadow:
    0 1px 0 #1a1a2e,
    0 2px 4px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.1);
}

.retro-btn:hover {
  background: linear-gradient(180deg, #4a4a6c, #3a3a52);
}

.retro-btn.small {
  font-size: 9px;
  padding: 8px 12px;
}

.retro-btn.tiny {
  font-size: 8px;
  padding: 4px 8px;
}

.retro-btn.active {
  background: linear-gradient(180deg, #1a5a3a, #0a3a2a);
  box-shadow: 0 4px 0 #082a1a, 0 6px 12px rgba(0,0,0,0.3), inset 0 1px 0 rgba(0,255,100,0.2);
  color: var(--green);
}

.sliders {
  gap: 16px;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-group label {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: var(--text-dim);
}

.slider-group span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  min-width: 32px;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100px;
  height: 6px;
  background: var(--bg-mid);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(0,240,255,0.4);
}

.toggle-group {
  display: flex;
  gap: 12px;
}

.toggle-group label {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Gamepad */
#gamepad {
  margin: 16px auto;
  max-width: 500px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-mid));
  border-radius: 12px;
  border: 1px solid rgba(0,240,255,0.1);
}

.dpad-container {
  display: grid;
  grid-template-columns: 40px 40px 40px;
  grid-template-rows: 40px 40px 40px;
  gap: 2px;
}

.dpad-btn {
  background: linear-gradient(180deg, #3a3a5c, #2a2a42);
  border: 1px solid rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.dpad-btn:active, .dpad-btn.pressed {
  background: linear-gradient(180deg, var(--bg-mid), #1a1a2e);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}

.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-center { grid-column: 2; grid-row: 2; background: #1a1a2e; border: none; cursor: default; }
.dpad-right { grid-column: 3; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 3; }

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.action-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--magenta), #aa0066);
  border: 2px solid rgba(255,255,255,0.1);
  color: white;
  font-family: var(--font-pixel);
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 3px 0 #660033, 0 4px 8px rgba(0,0,0,0.4);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.action-btn:active, .action-btn.pressed {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #660033;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(5, 32px);
  grid-template-rows: repeat(2, 32px);
  gap: 3px;
}

.keypad-btn {
  background: linear-gradient(180deg, #2a2a42, #1a1a2e);
  border: 1px solid rgba(0,240,255,0.15);
  color: var(--cyan);
  font-family: var(--font-pixel);
  font-size: 10px;
  cursor: pointer;
  border-radius: 4px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.keypad-btn:active, .keypad-btn.pressed {
  background: rgba(0,240,255,0.15);
}

/* Debug Panel */
#debug-panel {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: min(400px, 90vw);
  background: rgba(10,10,26,0.97);
  border-left: 2px solid var(--green);
  z-index: 100;
  overflow-y: auto;
  transform: translateX(0);
  transition: transform 0.3s;
}

#debug-panel.hidden {
  transform: translateX(100%);
}

.debug-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: rgba(0,255,100,0.05);
  border-bottom: 1px solid var(--green);
  font-family: var(--font-pixel);
  font-size: 10px;
  color: var(--green);
  position: sticky;
  top: 0;
  z-index: 1;
}

.close-btn {
  background: none;
  border: 1px solid var(--green);
  color: var(--green);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 4px;
}

.debug-section {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(0,255,100,0.1);
}

.debug-section h3 {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: var(--green);
  margin-bottom: 6px;
  opacity: 0.8;
}

.debug-section pre {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green);
  line-height: 1.5;
  white-space: pre;
  overflow-x: auto;
}

.psg-display {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.psg-ch {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
}

.psg-bar {
  flex: 1;
  height: 8px;
  background: rgba(0,255,100,0.1);
  border-radius: 4px;
  overflow: hidden;
}

.psg-fill {
  height: 100%;
  background: var(--green);
  width: 0%;
  transition: width 0.05s;
}

.psg-freq {
  min-width: 50px;
  text-align: right;
  font-size: 9px;
}

.disasm {
  font-size: 10px !important;
  max-height: 200px;
  overflow-y: auto;
}

.disasm .current {
  color: var(--cyan);
  background: rgba(0,240,255,0.1);
}

.mem-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.mem-controls label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
}

.mem-controls input {
  background: var(--bg-deep);
  border: 1px solid var(--green);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 4px;
  width: 50px;
  text-transform: uppercase;
}

.memview {
  font-size: 9px !important;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.4;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay.hidden {
  display: none;
}

.modal-box {
  background: var(--bg-dark);
  border: 2px solid var(--cyan);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-box h3 {
  font-family: var(--font-pixel);
  font-size: 12px;
  color: var(--cyan);
  margin-bottom: 16px;
  text-align: center;
}

.key-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.key-table td {
  padding: 6px 12px;
  border-bottom: 1px solid rgba(0,240,255,0.1);
  font-size: 12px;
}

.key-table td:first-child {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: bold;
}

.about-box p {
  font-size: 12px;
  line-height: 1.6;
  margin-bottom: 12px;
  color: var(--text);
}

.about-box .disclaimer {
  color: var(--text-dim);
  font-size: 10px;
  font-style: italic;
}

/* Status Bar */
#status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: rgba(0,0,0,0.5);
  border-top: 1px solid rgba(0,255,100,0.2);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  flex-wrap: wrap;
  gap: 8px;
}

/* Footer */
footer {
  text-align: center;
  padding: 16px;
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

footer a {
  color: var(--cyan);
  text-decoration: none;
}

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

.footer-disclaimer {
  font-size: 9px;
  opacity: 0.6;
}

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

/* Responsive */
@media (max-width: 600px) {
  #app { padding: 5px; }
  .crt-bezel { padding: 10px 10px 8px; border-radius: 12px; }
  .keypad { grid-template-columns: repeat(5, 28px); grid-template-rows: repeat(2, 28px); }
  .dpad-container { grid-template-columns: 35px 35px 35px; grid-template-rows: 35px 35px 35px; }
  .action-btn { width: 42px; height: 42px; font-size: 12px; }
  .retro-btn { padding: 8px 12px; font-size: 12px; }
  .retro-btn.small { font-size: 8px; padding: 6px 8px; }
  #status-bar { font-size: 8px; }
}

/* Fullscreen canvas */
canvas:-webkit-full-screen { width: 100vw; height: 100vh; object-fit: contain; background: #000; }
canvas:-moz-full-screen { width: 100vw; height: 100vh; object-fit: contain; background: #000; }
canvas:fullscreen { width: 100vw; height: 100vh; object-fit: contain; background: #000; }