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

:root {
  --bg-deep: #0d0d1a;
  --bg-main: #1a1a2e;
  --bg-card: #16213e;
  --accent-red: #e94560;
  --accent-blue: #0f3460;
  --accent-cyan: #53d8fb;
  --text: #e0e0e0;
  --text-dim: #8888aa;
  --green: #00ff41;
  --font-retro: 'Press Start 2P', monospace;
  --font-mono: 'JetBrains Mono', monospace;
}

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

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 20px 16px 10px;
}

header h1 {
  font-family: var(--font-retro);
  font-size: clamp(18px, 4vw, 32px);
  color: var(--accent-red);
  text-shadow: 0 0 20px rgba(233,69,96,0.5), 2px 2px 0 #0f3460;
  letter-spacing: 2px;
}

header .subtitle {
  font-size: clamp(8px, 1.5vw, 12px);
  color: var(--text-dim);
  margin-top: 6px;
  font-family: var(--font-retro);
}

#main-layout {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 10px 16px;
  flex: 1;
}

#screen-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
  width: 100%;
}

#crt-bezel {
  background: #111;
  border-radius: 20px;
  padding: 16px;
  box-shadow:
    inset 0 0 30px rgba(0,0,0,0.8),
    0 0 40px rgba(233,69,96,0.1),
    0 4px 20px rgba(0,0,0,0.6);
  border: 2px solid #2a2a3e;
}

#crt-screen {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: #000;
  line-height: 0;
}

#nes-canvas {
  width: 100%;
  max-width: 768px;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  display: block;
  background: #000;
}

#scanline-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.15) 1px,
    rgba(0,0,0,0.15) 2px
  );
  pointer-events: none;
  z-index: 2;
}

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

#power-glow {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.3) 0%, transparent 70%);
  transition: opacity 0.8s ease-out;
}

#power-glow.on {
  animation: crt-warmup 1.2s ease-out forwards;
}

@keyframes crt-warmup {
  0% { opacity: 0.7; }
  50% { opacity: 0.3; }
  100% { opacity: 0; }
}

#controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.ctrl-btn {
  font-family: var(--font-retro);
  font-size: 8px;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid #2a2a4e;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
  white-space: nowrap;
}

.ctrl-btn:hover:not(:disabled) {
  background: var(--accent-blue);
  border-color: var(--accent-cyan);
}

.ctrl-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.cartridge-btn {
  background: var(--accent-red);
  color: #fff;
  border-color: #c33;
  font-size: 9px;
  padding: 10px 16px;
}

.cartridge-btn:hover {
  background: #ff5a7a !important;
  border-color: var(--accent-red) !important;
}

#power-led {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #333;
  margin-right: 4px;
  vertical-align: middle;
  transition: all 0.3s;
}

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

.vol-control {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}

.vol-control input[type="range"] {
  width: 60px;
  accent-color: var(--accent-red);
}

.crt-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
}

.crt-toggle input { accent-color: var(--accent-red); }

select.ctrl-btn {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpath d='M0 2l4 4 4-4' fill='%23e0e0e0'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
}

/* Toast notification */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-red);
  color: #fff;
  font-family: var(--font-retro);
  font-size: 9px;
  padding: 10px 20px;
  border-radius: 6px;
  z-index: 9999;
  box-shadow: 0 4px 20px rgba(233,69,96,0.5);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.toast.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(-10px);
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.collapsible {
  width: 100%;
  max-width: 768px;
}

.collapse-header {
  font-family: var(--font-retro);
  font-size: 9px;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 8px 0;
  width: 100%;
  text-align: left;
}

.collapse-header:hover { color: var(--accent-cyan); }

.collapse-body { padding: 8px 0; }

.hidden { display: none !important; }

.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px;
}

.kb-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: border-color 0.2s;
}

.kb-item:hover { border-color: var(--accent-cyan); }

.kb-item.listening {
  border-color: var(--accent-red);
  animation: pulse-border 0.8s infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--accent-red); }
  50% { border-color: transparent; }
}

.kb-label { color: var(--text-dim); }
.kb-key { color: var(--accent-cyan); font-family: var(--font-retro); font-size: 8px; }

.kb-hint {
  font-size: 9px;
  color: var(--text-dim);
  margin-top: 8px;
}

/* Debug Panel */
#debug-panel {
  width: 360px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  background: var(--bg-main);
  border: 1px solid #2a2a4e;
  border-radius: 8px;
  padding: 12px;
  flex-shrink: 0;
}

#debug-panel h2 {
  font-family: var(--font-retro);
  font-size: 12px;
  color: var(--accent-red);
  margin-bottom: 10px;
}

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

.debug-section h3 {
  font-family: var(--font-retro);
  font-size: 8px;
  color: var(--accent-cyan);
  margin-bottom: 6px;
}

.debug-section pre {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  color: var(--green);
  background: #0a0a15;
  padding: 8px;
  border-radius: 4px;
  overflow-x: auto;
}

.debug-section canvas {
  image-rendering: pixelated;
  border: 1px solid #2a2a4e;
  border-radius: 4px;
  max-width: 100%;
}

.pattern-tables {
  display: flex;
  gap: 8px;
}

.pattern-tables canvas {
  width: 128px;
  height: 128px;
}

#nt-canvas {
  width: 100%;
}

#palette-canvas {
  width: 256px;
  height: 32px;
}

/* Gamepad overlay */
#gamepad-overlay {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 20px;
  pointer-events: none;
  z-index: 100;
}

#gamepad-overlay > * { pointer-events: auto; }

#dpad {
  display: grid;
  grid-template-areas:
    ". up ."
    "left . right"
    ". down .";
  grid-template-columns: 50px 50px 50px;
  grid-template-rows: 50px 50px 50px;
  gap: 2px;
}

.dpad-btn {
  background: rgba(30,30,60,0.85);
  color: #fff;
  border: 2px solid rgba(83,216,251,0.4);
  border-radius: 8px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.dpad-up { grid-area: up; }
.dpad-down { grid-area: down; }
.dpad-left { grid-area: left; }
.dpad-right { grid-area: right; }

.dpad-btn:active, .dpad-btn.pressed { background: rgba(233,69,96,0.7); }

#center-btns {
  display: flex;
  gap: 12px;
  align-self: flex-end;
  margin-bottom: 10px;
}

.pill-btn {
  font-family: var(--font-retro);
  font-size: 7px;
  background: rgba(30,30,60,0.85);
  color: #aaa;
  border: 2px solid rgba(83,216,251,0.3);
  border-radius: 20px;
  padding: 8px 16px;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.pill-btn:active, .pill-btn.pressed { background: rgba(233,69,96,0.5); }

#ab-btns {
  display: flex;
  gap: 14px;
  align-items: center;
}

.ab-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(140,20,40,0.85);
  color: #fff;
  font-family: var(--font-retro);
  font-size: 14px;
  border: 3px solid rgba(233,69,96,0.6);
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.ab-btn:active, .ab-btn.pressed { background: rgba(233,69,96,0.9); }

#status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-main);
  border-top: 1px solid #2a2a4e;
  font-size: 9px;
  font-family: var(--font-retro);
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 8px;
}

footer {
  text-align: center;
  padding: 12px;
  font-size: 10px;
}

footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-family: var(--font-retro);
  font-size: 9px;
}

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

.mapper-warning {
  color: var(--accent-red);
  font-family: var(--font-retro);
  font-size: 9px;
  text-align: center;
  padding: 8px;
  animation: pulse-border 1s infinite;
}

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

@media (max-width: 768px) {
  #main-layout { flex-direction: column; align-items: center; }
  #debug-panel { width: 100%; max-height: 400px; }
  #gamepad-overlay.visible { display: flex !important; }
  #controls-bar { font-size: 7px; }
  .ctrl-btn { padding: 6px 8px; font-size: 7px; }
}

@media (min-width: 769px) {
  #gamepad-overlay { display: none !important; }
}