* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --shell-color: #8B8986;
  --shell-light: #A8A5A0;
  --shell-dark: #6B6865;
  --bg-color: #0D0D1A;
  --bg-gradient: linear-gradient(135deg, #0D0D1A 0%, #16213E 50%, #1A1A2E 100%);
  --berry: #E63946;
  --berry-glow: #ff4d5e;
  --screen-green: #9BBC0F;
  --btn-maroon: #A30000;
  --btn-maroon-press: #7a0000;
  --btn-dark: #3D3D3D;
  --btn-dark-press: #2a2a2a;
  --text-light: #E0DDD8;
  --text-dim: #888;
}

body {
  background: var(--bg-gradient);
  min-height: 100vh;
  font-family: 'Press Start 2P', monospace;
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
}

#app {
  max-width: 700px;
  width: 100%;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#header {
  text-align: center;
  margin: 20px 0 10px;
}

.title {
  font-size: 28px;
  color: var(--berry);
  text-shadow: 0 0 20px rgba(230, 57, 70, 0.6), 0 0 40px rgba(230, 57, 70, 0.3);
  letter-spacing: 2px;
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from { text-shadow: 0 0 15px rgba(230, 57, 70, 0.5), 0 0 30px rgba(230, 57, 70, 0.2); }
  to { text-shadow: 0 0 25px rgba(230, 57, 70, 0.8), 0 0 50px rgba(230, 57, 70, 0.4); }
}

.subtitle {
  font-size: 8px;
  color: var(--text-dim);
  margin-top: 8px;
  letter-spacing: 1px;
}

.badge {
  font-size: 6px;
  color: var(--screen-green);
  margin-top: 6px;
  padding: 3px 8px;
  border: 1px solid var(--screen-green);
  border-radius: 3px;
  display: inline-block;
  opacity: 0.8;
}

.badge-apu {
  color: var(--berry);
  font-weight: bold;
  text-shadow: 0 0 6px rgba(230, 57, 70, 0.6);
}

#gameboy-shell {
  background: linear-gradient(180deg, var(--shell-light) 0%, var(--shell-color) 15%, var(--shell-dark) 100%);
  border-radius: 20px 20px 20px 80px;
  padding: 20px 25px 30px;
  margin: 10px 0;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.2), inset 0 -2px 4px rgba(0,0,0,0.2);
  position: relative;
}

.screen-label {
  font-size: 5px;
  text-align: center;
  color: #555;
  letter-spacing: 3px;
  margin-bottom: 4px;
  text-transform: uppercase;
}

#screen-bezel {
  background: #2C2C3A;
  border-radius: 10px;
  padding: 15px 20px 15px 20px;
  position: relative;
  box-shadow: inset 0 3px 8px rgba(0,0,0,0.6), inset 0 -1px 2px rgba(255,255,255,0.05);
}

#power-led {
  width: 6px; height: 6px; border-radius: 50%;
  background: #333; position: absolute; top: 8px; right: 15px;
  transition: all 0.3s;
}
#power-led.on {
  background: #ff2020;
  box-shadow: 0 0 6px #ff2020, 0 0 12px rgba(255, 32, 32, 0.4);
}

#canvas {
  display: block; width: 100%; max-width: 480px; height: auto;
  aspect-ratio: 160 / 144;
  image-rendering: pixelated; image-rendering: crisp-edges;
  background: #9BBC0F; border-radius: 2px; margin: 0 auto;
}

#drop-overlay {
  position: absolute; top: 15px; left: 20px; right: 20px; bottom: 15px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; border-radius: 2px; z-index: 5; transition: background 0.2s;
}
#drop-overlay:hover { background: rgba(155, 188, 15, 0.08); }
#drop-overlay.drag-over { background: rgba(230, 57, 70, 0.15); border: 2px dashed var(--berry); }
#drop-overlay.hidden { display: none; }

.drop-text {
  font-size: 8px; color: #306230; text-align: center; line-height: 2;
  animation: bounce-text 2s ease-in-out infinite; pointer-events: none;
}
@keyframes bounce-text { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }

#rom-info { font-size: 6px; color: var(--text-dim); text-align: center; margin-top: 8px; min-height: 12px; }

#virtual-controls {
  display: flex; justify-content: space-between; align-items: center;
  margin: 20px 10px 5px; padding: 0 10px;
}

#dpad { display: grid; grid-template-columns: 36px 36px 36px; grid-template-rows: 36px 36px 36px; gap: 0; }

.dpad-btn {
  background: var(--btn-dark); border: none; color: #777; font-size: 12px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-family: 'Press Start 2P', monospace; transition: all 0.05s;
  -webkit-user-select: none; user-select: none;
}
.dpad-up { border-radius: 4px 4px 0 0; }
.dpad-down { border-radius: 0 0 4px 4px; }
.dpad-left { border-radius: 4px 0 0 4px; }
.dpad-right { border-radius: 0 4px 4px 0; }
.dpad-center { background: #333; cursor: default; }
.dpad-btn:active, .dpad-btn.pressed { background: var(--btn-dark-press); transform: scale(0.92); color: #aaa; }

#ab-buttons { display: flex; gap: 12px; transform: rotate(-15deg); }

.ab-btn {
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--btn-maroon); border: none; color: #ddd;
  font-family: 'Press Start 2P', monospace; font-size: 10px; cursor: pointer;
  box-shadow: 0 3px 0 #700, 0 4px 8px rgba(0,0,0,0.3);
  transition: all 0.05s; -webkit-user-select: none; user-select: none;
}
.ab-btn:active, .ab-btn.pressed {
  background: var(--btn-maroon-press);
  box-shadow: 0 1px 0 #500, 0 2px 4px rgba(0,0,0,0.3);
  transform: translateY(2px);
}
#btn-b { margin-top: 15px; }

#ss-buttons {
  display: flex; justify-content: center; gap: 20px; margin: 10px 0; transform: rotate(-5deg);
}
.ss-btn {
  padding: 6px 14px; border-radius: 10px; background: var(--btn-dark);
  border: none; color: #777; font-family: 'Press Start 2P', monospace;
  font-size: 6px; cursor: pointer; box-shadow: 0 2px 0 #222;
  transition: all 0.05s; -webkit-user-select: none; user-select: none;
}
.ss-btn:active, .ss-btn.pressed { background: var(--btn-dark-press); box-shadow: 0 0 0 #222; transform: translateY(2px); }

#toolbar {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  justify-content: center; margin: 10px 0; max-width: 500px;
}

.tool-btn {
  font-family: 'Press Start 2P', monospace; font-size: 7px;
  padding: 6px 10px; border: 1px solid #444; background: #222;
  color: var(--text-light); border-radius: 4px; cursor: pointer; transition: all 0.15s;
}
.tool-btn:hover:not(:disabled) { background: #333; border-color: var(--berry); }
.tool-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.tool-select {
  font-family: 'Press Start 2P', monospace; font-size: 7px;
  padding: 5px 6px; border: 1px solid #444; background: #222;
  color: var(--text-light); border-radius: 4px; cursor: pointer;
}

.volume-slider {
  width: 60px; height: 4px; -webkit-appearance: none; appearance: none;
  background: #333; border-radius: 2px; outline: none; cursor: pointer; vertical-align: middle;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: var(--screen-green); cursor: pointer; border: 1px solid #222;
}
.volume-slider::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--screen-green); cursor: pointer; border: 1px solid #222;
}

#fps-counter { font-size: 7px; color: var(--screen-green); min-width: 50px; text-align: right; }

/* Audio Visualization Panel */
#audio-section, #keyboard-help, #debug-section {
  max-width: 600px; width: 100%; text-align: center; margin: 4px 0;
}

#audio-panel {
  margin-top: 6px; padding: 12px; background: rgba(0,0,0,0.5);
  border-radius: 8px; border: 1px solid #2a2a3a;
}

#channel-viz-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 6px; margin-bottom: 8px;
}

.ch-viz-box {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
}

.ch-viz-label {
  font-size: 6px; color: #888; display: flex; align-items: center; gap: 4px;
}

.scope-canvas {
  border: 1px solid #2a2a3a; border-radius: 3px; width: 100%; height: 48px;
  image-rendering: pixelated;
}
.scope-canvas.wide { height: 48px; }

.ch-mute-btn {
  font-size: 8px; padding: 2px 6px; border: 1px solid #333;
  background: #1a1a1a; border-radius: 3px; cursor: pointer;
  transition: all 0.1s; color: #aaa;
}
.ch-mute-btn:hover { border-color: var(--berry); }
.ch-mute-btn.muted { background: #3a1515; border-color: #E63946; }

.dac-led {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
}
.dac-on {
  background: #4ade80; box-shadow: 0 0 4px #4ade80;
}
.dac-off {
  background: #333;
}

#mixer-viz-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px;
}
.mixer-viz-box { display: flex; flex-direction: column; align-items: center; gap: 3px; }

#mixer-info {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  font-size: 5px; color: #8888aa; margin-bottom: 6px;
}

#hpf-model-row {
  display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 4px;
}
.hpf-label { font-size: 6px; color: #888; }

#key-map {
  font-size: 6px; color: var(--text-dim); line-height: 2.2;
  margin-top: 6px; padding: 8px; background: rgba(0,0,0,0.3); border-radius: 6px;
}

#debug-panel {
  font-size: 6px; color: var(--screen-green);
  margin-top: 6px; padding: 10px; background: rgba(0,0,0,0.4);
  border-radius: 6px; text-align: left; line-height: 2;
}

#cpu-regs, #ppu-state, #apu-state, #apu-detail { margin-bottom: 6px; font-family: 'Press Start 2P', monospace; }
#apu-detail { font-size: 5px; color: #88aa88; }

#apu-state .ch-bar {
  display: inline-block; width: 8px; height: 8px; border-radius: 2px;
  margin: 0 1px; vertical-align: middle;
}
#apu-state .ch-on { background: #0f0; box-shadow: 0 0 4px #0f0; }
#apu-state .ch-off { background: #333; }

#debug-controls { margin: 6px 0; display: flex; gap: 6px; }

#corruption-section {
  margin: 10px 0; padding: 10px; border: 1px solid #E63946;
  border-radius: 6px; background: rgba(230, 57, 70, 0.08);
}
.corruption-header {
  font-size: 7px; color: #E63946; text-align: center; margin-bottom: 8px;
  letter-spacing: 2px; text-shadow: 0 0 8px rgba(230, 57, 70, 0.5);
}
.corruption-controls { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.corruption-label { font-size: 6px; color: #ccc; display: flex; align-items: center; gap: 6px; }
.corruption-slider {
  width: 120px; height: 4px; -webkit-appearance: none; appearance: none;
  background: linear-gradient(90deg, #333, #E63946); border-radius: 2px; outline: none; cursor: pointer;
}
.corruption-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: #E63946; cursor: pointer; border: 1px solid #222;
  box-shadow: 0 0 6px rgba(230, 57, 70, 0.6);
}
.corruption-slider::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%; background: #E63946;
  cursor: pointer; border: 1px solid #222;
}
#corruption-value { color: #E63946; min-width: 28px; text-align: right; font-size: 7px; }
.corruption-targets { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.corruption-target-label { font-size: 6px; color: #aaa; display: flex; align-items: center; gap: 3px; cursor: pointer; }
.corruption-target-label input[type="checkbox"] { accent-color: #E63946; width: 10px; height: 10px; cursor: pointer; }
.corrupt-btn {
  background: linear-gradient(180deg, #8B0000, #5a0000) !important;
  border-color: #E63946 !important; color: #ff6b6b !important;
  font-size: 8px !important; padding: 8px 20px !important; letter-spacing: 1px;
  text-shadow: 0 0 6px rgba(230, 57, 70, 0.6);
}
.corrupt-btn:hover:not(:disabled) {
  background: linear-gradient(180deg, #a00000, #700000) !important;
  box-shadow: 0 0 15px rgba(230, 57, 70, 0.4); transform: scale(1.05);
}
.corrupt-btn.corrupting { animation: corruptPulse 0.3s ease-out; }
@keyframes corruptPulse {
  0% { box-shadow: 0 0 0px rgba(230, 57, 70, 0); }
  50% { box-shadow: 0 0 25px rgba(230, 57, 70, 0.8); background: linear-gradient(180deg, #c00, #800) !important; }
  100% { box-shadow: 0 0 0px rgba(230, 57, 70, 0); }
}
#corruption-status { font-size: 6px; color: #E63946; text-align: center; margin-top: 4px; min-height: 10px; opacity: 0.8; }

#tile-viewer {
  image-rendering: pixelated; width: 256px; height: 384px;
  background: #0F380F; margin-top: 6px; border: 1px solid #444;
}

.hidden { display: none !important; }

#status-bar {
  font-size: 6px; display: flex; justify-content: space-between;
  padding: 6px 15px; max-width: 600px; width: 100%; color: var(--text-dim);
}

#footer {
  text-align: center; margin: 30px 0 20px; font-size: 6px;
  color: var(--text-dim); line-height: 2.5;
}
#footer a { color: var(--berry); text-decoration: none; }
#footer a:hover { text-decoration: underline; }
.disclaimer { opacity: 0.6; }

@media (max-width: 520px) {
  #gameboy-shell { border-radius: 12px 12px 12px 40px; padding: 12px 12px 20px; }
  .title { font-size: 20px; }
  .dpad-btn { width: 40px; height: 40px; }
  #dpad { grid-template-columns: 40px 40px 40px; grid-template-rows: 40px 40px 40px; }
  .ab-btn { width: 55px; height: 55px; }
  #toolbar { gap: 4px; }
  .tool-btn, .tool-select { font-size: 6px; padding: 5px 7px; }
  #channel-viz-row { grid-template-columns: repeat(2, 1fr); }
}