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

:root {
  --bg-dark: #0d0d1a;
  --bg-panel: #141428;
  --bg-surface: #1a1a2e;
  --bg-pcb: #0a2e0a;
  --border: #2a2a4e;
  --accent-amber: #e2703a;
  --accent-green: #00ff41;
  --accent-red: #cc3300;
  --accent-blue: #4488ff;
  --accent-cyan: #00cccc;
  --text-primary: #e0e0e0;
  --text-dim: #888;
  --text-bright: #ffffff;
  --crt-green: #33ff66;
  --woodgrain: #5c3a1e;
  --woodgrain-light: #8b6914;
}

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'IBM Plex Sans', sans-serif;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Top Bar */
#top-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: linear-gradient(180deg, #1a1a2e 0%, #0d0d1a 100%);
  border-bottom: 2px solid var(--accent-amber);
  flex-wrap: wrap;
}

#logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-atari {
  font-size: 28px;
  color: var(--accent-red);
  text-shadow: 0 0 10px var(--accent-red);
}

.logo-text {
  font-family: 'Press Start 2P', monospace;
  font-size: 14px;
  color: var(--accent-amber);
  text-shadow: 0 0 8px rgba(226, 112, 58, 0.5);
}

.logo-sub {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--text-dim);
}

#demo-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

#demo-selector label {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--accent-amber);
}

#demo-select {
  background: var(--bg-surface);
  color: var(--accent-green);
  border: 1px solid var(--border);
  padding: 4px 8px;
  font-family: 'VT323', monospace;
  font-size: 16px;
  border-radius: 2px;
  cursor: pointer;
}

.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--border);
  color: var(--accent-amber);
  border-radius: 50%;
  font-family: 'VT323', monospace;
  font-size: 14px;
  cursor: help;
}

#sim-controls {
  display: flex;
  gap: 6px;
}

#sim-controls button {
  font-family: 'VT323', monospace;
  font-size: 14px;
  padding: 4px 10px;
  background: var(--bg-surface);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
}

#sim-controls button:hover {
  background: rgba(0, 255, 65, 0.15);
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.3);
}

#sim-controls button.active {
  background: rgba(0, 255, 65, 0.2);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.4);
}

/* Main Layout */
#main-layout {
  display: flex;
  gap: 8px;
  padding: 8px;
  min-height: calc(100vh - 120px);
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 8px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: linear-gradient(90deg, var(--bg-surface), transparent);
  border-bottom: 1px solid var(--border);
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--accent-amber);
  cursor: pointer;
  user-select: none;
}

.panel-toggle {
  font-size: 12px;
  transition: transform 0.2s;
}

.panel-header.collapsed .panel-toggle {
  transform: rotate(-90deg);
}

.panel-body {
  padding: 8px;
  max-height: 600px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.panel-body::-webkit-scrollbar {
  width: 6px;
}

.panel-body::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* Left Panel */
#left-panel {
  width: 300px;
  min-width: 260px;
  flex-shrink: 0;
  overflow-y: auto;
  max-height: calc(100vh - 120px);
}

.reg-section {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(42, 42, 78, 0.5);
}

.reg-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--accent-cyan);
  margin-bottom: 6px;
}

.reg-hint {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--text-dim);
  margin-left: 6px;
}

.reg-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.reg-row label {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--accent-amber);
  width: 52px;
  flex-shrink: 0;
}

.bit-grid {
  display: flex;
  gap: 2px;
}

.bit-cell {
  width: 18px;
  height: 18px;
  background: #0a0a15;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.1s;
  border-radius: 1px;
}

.bit-cell.on {
  background: var(--accent-green);
  box-shadow: 0 0 6px rgba(0, 255, 65, 0.5);
}

.bit-cell:hover {
  border-color: var(--accent-amber);
}

.sprite-grid .bit-cell {
  width: 20px;
  height: 20px;
}

.hex-val {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--accent-green);
  min-width: 30px;
}

.ctrl-toggles {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.toggle-btn {
  font-family: 'VT323', monospace;
  font-size: 13px;
  padding: 2px 8px;
  background: #0a0a15;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
}

.toggle-btn.active {
  background: rgba(0, 255, 65, 0.15);
  color: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: 0 0 6px rgba(0, 255, 65, 0.3);
}

.retro-select {
  background: var(--bg-surface);
  color: var(--accent-green);
  border: 1px solid var(--border);
  padding: 2px 6px;
  font-family: 'VT323', monospace;
  font-size: 14px;
  border-radius: 2px;
  cursor: pointer;
}

.retro-select.small {
  font-size: 13px;
  padding: 1px 4px;
}

.slider-row {
  gap: 4px;
}

.retro-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  outline: none;
}

.retro-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent-amber);
  border-radius: 2px;
  cursor: pointer;
  box-shadow: 0 0 4px rgba(226, 112, 58, 0.5);
}

.slider-val {
  font-family: 'VT323', monospace;
  font-size: 15px;
  color: var(--accent-green);
  min-width: 24px;
  text-align: right;
}

/* Color Swatches */
.color-reg-row {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 4px 0;
}

.color-swatch {
  width: 48px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: white;
  text-shadow: 0 0 2px black, 0 0 4px black;
  transition: all 0.15s;
}

.color-swatch:hover {
  border-color: var(--accent-amber);
  transform: scale(1.1);
}

/* Palette Picker */
#palette-picker {
  position: absolute;
  z-index: 100;
  background: var(--bg-panel);
  border: 2px solid var(--accent-amber);
  border-radius: 4px;
  padding: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.8);
}

#palette-picker.hidden {
  display: none;
}

.palette-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

#palette-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--accent-amber);
}

#palette-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
}

#palette-canvas {
  cursor: crosshair;
  border: 1px solid var(--border);
  display: block;
}

#palette-info {
  display: flex;
  gap: 12px;
  margin-top: 4px;
  font-family: 'VT323', monospace;
  font-size: 15px;
  color: var(--accent-green);
}

/* Center Area */
#center-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

/* TV Bezel */
#tv-bezel {
  background: linear-gradient(135deg, #5c3a1e 0%, #3d2510 30%, #6b4420 50%, #3d2510 70%, #5c3a1e 100%);
  border-radius: 12px;
  padding: 12px;
  border: 3px solid #2a1808;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.6);
  position: relative;
}

#tv-label {
  text-align: center;
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  color: #b8860b;
  margin-bottom: 6px;
  letter-spacing: 2px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

#tv-screen-container {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid #111;
  aspect-ratio: 320/210;
}

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

#crt-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, 0.15) 0px,
      rgba(0, 0, 0, 0.15) 1px,
      transparent 1px,
      transparent 3px
    );
  border-radius: 8px;
  mix-blend-mode: multiply;
}

#crt-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.4) 100%);
  border-radius: 8px;
}

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

#tv-controls-row {
  display: flex;
  gap: 12px;
  margin-top: 6px;
  justify-content: center;
}

.crt-toggle {
  font-family: 'VT323', monospace;
  font-size: 13px;
  color: #b8860b;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

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

/* Collision Panel */
#collision-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
}

#collision-canvas {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

/* Timeline */
#timeline-panel {
  flex-shrink: 0;
}

.timeline-info {
  font-family: 'VT323', monospace;
  font-size: 15px;
  color: var(--accent-green);
}

#timeline-canvas {
  width: 100%;
  height: 80px;
  display: block;
  border-top: 1px solid var(--border);
}

#timeline-labels {
  position: relative;
  height: 16px;
  font-family: 'VT323', monospace;
  font-size: 12px;
  color: var(--text-dim);
}

.tl-label {
  position: absolute;
}

/* Right Panel */
#right-panel {
  width: 260px;
  min-width: 220px;
  flex-shrink: 0;
  overflow-y: auto;
  max-height: calc(100vh - 120px);
}

/* CPU */
.cpu-regs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-bottom: 6px;
}

.cpu-reg {
  display: flex;
  align-items: center;
  gap: 4px;
}

.cpu-reg label {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--accent-amber);
}

.cpu-reg span {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--accent-green);
}

.cpu-flags {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 6px;
}

.flag {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--text-dim);
  padding: 2px 5px;
  background: #0a0a15;
  border: 1px solid var(--border);
  border-radius: 2px;
}

.flag.active {
  color: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: 0 0 4px rgba(0, 255, 65, 0.3);
}

.cpu-detail {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cpu-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cpu-row label {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--accent-amber);
  width: 50px;
}

.cpu-row span {
  font-family: 'VT323', monospace;
  font-size: 16px;
  color: var(--accent-green);
}

.led-on {
  color: var(--accent-green) !important;
  text-shadow: 0 0 6px var(--accent-green);
}

.led-off {
  color: #333 !important;
}

/* Audio */
.audio-channel {
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(42, 42, 78, 0.5);
}

.aud-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.aud-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 3px;
}

.aud-row label {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--accent-amber);
  width: 36px;
  flex-shrink: 0;
}

.wave-canvas {
  width: 100%;
  height: 40px;
  background: #0a0a15;
  border: 1px solid var(--border);
  border-radius: 2px;
  display: block;
}

.retro-btn {
  display: block;
  width: 100%;
  padding: 6px 12px;
  font-family: 'VT323', monospace;
  font-size: 16px;
  background: var(--bg-surface);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber);
  border-radius: 3px;
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}

.retro-btn:hover {
  background: rgba(226, 112, 58, 0.15);
  box-shadow: 0 0 8px rgba(226, 112, 58, 0.3);
}

/* Info Panel */
.info-panel-body {
  font-size: 13px;
  line-height: 1.5;
}

.info-panel-body p {
  margin-bottom: 6px;
}

.info-panel-body strong {
  color: var(--accent-amber);
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
}

.fun-fact {
  background: rgba(226, 112, 58, 0.1);
  padding: 4px 6px;
  border-left: 2px solid var(--accent-amber);
  font-size: 12px;
  color: var(--accent-amber);
}

.credits {
  color: var(--text-dim);
  font-size: 11px;
  font-style: italic;
}

/* Footer */
#footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
}

.footer-tagline {
  font-family: 'VT323', monospace;
  font-size: 14px;
  color: var(--text-dim);
}

.remix-link {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--accent-red);
  text-decoration: none;
  padding: 4px 12px;
  border: 1px solid var(--accent-red);
  border-radius: 3px;
  transition: all 0.15s;
}

.remix-link:hover {
  background: rgba(204, 51, 0, 0.2);
  box-shadow: 0 0 8px rgba(204, 51, 0, 0.4);
}

/* Export Modal */
#export-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

#export-modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-panel);
  border: 2px solid var(--accent-amber);
  border-radius: 6px;
  padding: 16px;
  width: 90%;
  max-width: 500px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: var(--accent-amber);
}

.modal-header button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
}

#export-text {
  width: 100%;
  height: 300px;
  background: #0a0a15;
  color: var(--accent-green);
  border: 1px solid var(--border);
  font-family: 'VT323', monospace;
  font-size: 15px;
  padding: 8px;
  resize: none;
}

/* Responsive */
@media (max-width: 1200px) {
  #left-panel { width: 240px; min-width: 200px; }
  #right-panel { width: 220px; min-width: 180px; }
}

@media (max-width: 900px) {
  #main-layout {
    flex-direction: column;
  }
  #left-panel, #right-panel {
    width: 100%;
    max-height: none;
  }
  #top-bar {
    flex-wrap: wrap;
    gap: 8px;
  }
  #demo-selector {
    margin-left: 0;
  }
}

@media (max-width: 600px) {
  #sim-controls button {
    font-size: 12px;
    padding: 3px 6px;
  }
  .logo-text {
    font-size: 10px;
  }
  .bit-cell {
    width: 14px;
    height: 14px;
  }
  .sprite-grid .bit-cell {
    width: 16px;
    height: 16px;
  }
  .footer-tagline {
    font-size: 11px;
  }
}