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

:root {
  --bg-deep: #0d0d1a;
  --bg-main: #1a1a2e;
  --bg-panel: #16213e;
  --gb-purple: #6c3483;
  --gb-green: #9bbc0f;
  --gb-green-dark: #0f380f;
  --gb-green-light: #8bac0f;
  --berry: #e74c3c;
  --berry-glow: #ff6b6b;
  --text: #e0e0e0;
  --text-dim: #8888aa;
  --shell-dmg: #c0c0c8;
  --shell-cgb: #7b68ae;
  --screen-dmg: #9bbc0f;
  --maroon: #8b1a34;
}

body {
  font-family: 'Press Start 2P', monospace;
  background: var(--bg-deep);
  background-image: 
    radial-gradient(ellipse at 20% 50%, rgba(108,52,131,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(231,76,60,0.1) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,0.01) 2px, rgba(255,255,255,0.01) 4px);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-user-select: none;
  user-select: none;
}

#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 10px;
}

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

.title {
  font-size: clamp(18px, 4vw, 32px);
  color: var(--berry);
  text-shadow: 0 0 20px rgba(231,76,60,0.5), 2px 2px 0 #000;
  letter-spacing: 2px;
}
.title .berry { filter: drop-shadow(0 0 8px rgba(231,76,60,0.6)); }

.subtitle {
  font-size: clamp(7px, 1.5vw, 10px);
  color: var(--text-dim);
  margin-top: 6px;
  letter-spacing: 1px;
}

#main-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 700px;
}

/* Upload Zone */
.upload-zone {
  width: 100%;
  max-width: 500px;
  margin: 20px 0;
  transition: opacity 0.3s;
}
.upload-zone.hidden { display: none; }

.cartridge-slot {
  border: 3px dashed var(--gb-purple);
  border-radius: 12px;
  padding: 30px 20px;
  text-align: center;
  background: rgba(108,52,131,0.08);
  transition: all 0.3s;
  animation: pulse-border 2s ease-in-out infinite;
  cursor: pointer;
}
.cartridge-slot:hover, .cartridge-slot.dragover {
  border-color: var(--berry);
  background: rgba(231,76,60,0.08);
  box-shadow: 0 0 30px rgba(231,76,60,0.15);
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--gb-purple); }
  50% { border-color: rgba(108,52,131,0.4); }
}

.slot-label {
  font-size: clamp(10px, 2vw, 14px);
  color: var(--gb-green);
  margin-bottom: 15px;
  letter-spacing: 2px;
}

.slot-visual {
  width: 80px; height: 8px;
  background: var(--gb-purple);
  margin: 0 auto 15px;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(108,52,131,0.3);
}

.file-btn {
  display: inline-block;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 10px 20px;
  background: var(--gb-purple);
  color: white;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.file-btn:hover {
  background: var(--berry);
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(231,76,60,0.4);
}
.file-btn input { display: none; }

.hint {
  font-size: 7px;
  color: var(--text-dim);
  margin-top: 12px;
}

/* ROM Info */
.rom-info {
  background: var(--bg-panel);
  border: 1px solid rgba(108,52,131,0.3);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 10px 0;
  font-size: 8px;
  line-height: 2;
  width: 100%;
  max-width: 500px;
}
.rom-info.hidden { display: none; }
.rom-info .label { color: var(--gb-green); }
.rom-info .value { color: var(--text); }

/* Game Boy Shell */
.gameboy-shell {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 10px 0;
}
.gameboy-shell.hidden { display: none; }

.shell-top {
  background: var(--shell-dmg);
  border-radius: 16px 16px 8px 8px;
  padding: 16px 20px 10px;
  box-shadow: 
    0 4px 20px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.3);
  position: relative;
}
.gameboy-shell.cgb-mode .shell-top {
  background: linear-gradient(135deg, var(--shell-cgb), #5b4a8e);
}

.screen-bezel {
  background: #2a2a3a;
  border-radius: 8px;
  padding: 12px 14px 8px;
  position: relative;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.6);
}

.power-led {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #333;
  position: absolute;
  top: 6px; left: 14px;
  transition: background 0.3s;
}
.power-led.on {
  background: var(--berry);
  box-shadow: 0 0 8px var(--berry);
}

.screen-inner {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: inset 0 1px 4px rgba(0,0,0,0.4);
  line-height: 0;
}

#screen {
  width: 480px;
  height: 432px;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  background: var(--gb-green-dark);
  display: block;
}

.gameboy-shell.cgb-mode #screen {
  background: #111;
}

.scanline-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.12) 1px,
    rgba(0,0,0,0.12) 2px
  );
  pointer-events: none;
}
.scanline-overlay.hidden { display: none; }

.dot-matrix-text {
  font-size: 5px;
  color: rgba(0,0,0,0.4);
  text-align: center;
  margin-top: 6px;
  letter-spacing: 2px;
}
.gameboy-shell.cgb-mode .dot-matrix-text { color: rgba(255,255,255,0.2); }

/* Controls Bar */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  padding: 10px 0;
  align-items: center;
}

.ctrl-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  padding: 6px 10px;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid rgba(108,52,131,0.3);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}
.ctrl-btn:hover {
  background: var(--gb-purple);
  transform: scale(1.08);
  box-shadow: 0 0 10px rgba(108,52,131,0.4);
}
.ctrl-btn:active { transform: scale(0.95); }

.volume-slider {
  width: 60px;
  accent-color: var(--berry);
}

/* Virtual Controls */
.virtual-controls {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  width: 100%;
  max-width: 500px;
  padding: 10px 10px 0;
}
.virtual-controls.hidden { display: none; }

.dpad-container { flex: 1; }
.dpad {
  display: grid;
  grid-template-columns: 44px 44px 44px;
  grid-template-rows: 44px 44px 44px;
  gap: 0;
  width: fit-content;
}
.dpad-btn {
  background: #2a2a3a;
  border: none;
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.dpad-btn:active, .dpad-btn.pressed {
  background: var(--gb-purple);
  color: white;
  transform: scale(0.92);
}
.dpad-up { border-radius: 6px 6px 0 0; grid-column: 2; grid-row: 1; }
.dpad-left { border-radius: 6px 0 0 6px; grid-column: 1; grid-row: 2; }
.dpad-center { background: #222; grid-column: 2; grid-row: 2; }
.dpad-right { border-radius: 0 6px 6px 0; grid-column: 3; grid-row: 2; }
.dpad-down { border-radius: 0 0 6px 6px; grid-column: 2; grid-row: 3; }

.action-buttons {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}

.ab-container {
  display: flex;
  gap: 12px;
  transform: rotate(-15deg);
}
.ab-btn {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--maroon);
  color: white;
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  border: none;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(0,0,0,0.4);
  transition: all 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.ab-btn:active, .ab-btn.pressed {
  transform: scale(0.9);
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
  background: #6b1028;
}

.start-select {
  display: flex;
  gap: 10px;
  transform: rotate(-20deg);
}
.ss-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 6px;
  padding: 6px 14px;
  background: #444;
  color: var(--text-dim);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.ss-btn:active, .ss-btn.pressed {
  background: #666;
  transform: scale(0.92);
}

/* Keyboard Info */
.keyboard-info {
  width: 100%;
  max-width: 500px;
  margin: 10px 0;
}
.key-map-toggle {
  font-size: 8px;
  color: var(--text-dim);
  cursor: pointer;
  text-align: center;
  padding: 6px;
  transition: color 0.2s;
}
.key-map-toggle:hover { color: var(--text); }
.key-map {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px;
  justify-content: center;
}
.key-map.hidden { display: none; }
.key-row {
  font-size: 7px;
  background: var(--bg-panel);
  padding: 4px 10px;
  border-radius: 4px;
}
.key-row .key { color: var(--gb-green); }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal.hidden { display: none; }
.modal-content {
  background: var(--bg-main);
  border: 1px solid var(--gb-purple);
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(108,52,131,0.3);
}
.modal-header h2 { font-size: 12px; color: var(--berry); }
.close-btn {
  background: none; border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
}
.close-btn:hover { color: var(--berry); }
.modal-body { padding: 14px 16px; }
.setting-group { margin-bottom: 14px; }
.setting-group h3 {
  font-size: 9px;
  color: var(--gb-green);
  margin-bottom: 8px;
}
.setting-group label {
  display: block;
  font-size: 8px;
  padding: 4px 0;
  cursor: pointer;
}
.setting-group label:hover { color: var(--berry-glow); }
.palette-select {
  font-size: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}
.palette-select select {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  padding: 4px;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--gb-purple);
  border-radius: 4px;
}

/* Footer */
.footer {
  margin-top: auto;
  padding: 20px;
  text-align: center;
  font-size: 7px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer a {
  color: var(--gb-purple);
  text-decoration: none;
}
.footer a:hover { color: var(--berry); }

/* Responsive */
@media (max-width: 540px) {
  #screen {
    width: calc(100vw - 60px);
    height: auto;
    aspect-ratio: 160/144;
  }
  .shell-top { padding: 10px 12px 8px; border-radius: 10px 10px 6px 6px; }
  .screen-bezel { padding: 8px 10px 6px; }
  .controls-bar { gap: 4px; }
  .ctrl-btn { font-size: 8px; padding: 5px 7px; }
  .volume-slider { width: 40px; }
}