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

:root {
  --crt-green: #33ff33;
  --crt-green-dim: #1a8c1a;
  --crt-green-dark: #0a3d0a;
  --crt-amber: #ffaa00;
  --crt-amber-dim: #8c5e00;
  --bg-dark: #0a0a0a;
  --bg-panel: #1a1a1a;
  --bg-bezel: #3a3530;
  --bg-bezel-light: #5a534a;
  --text-dim: #666;
  --red-btn: #cc2222;
  --red-btn-hover: #ee3333;
}

body {
  background: var(--bg-dark);
  color: var(--crt-green);
  font-family: 'IBM Plex Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

#app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px;
}

/* Header */
header {
  text-align: center;
  padding: 15px 0 10px;
}

header h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 20px;
  color: var(--crt-green);
  text-shadow: 0 0 10px var(--crt-green), 0 0 20px var(--crt-green-dim);
  letter-spacing: 2px;
}

header .subtitle {
  font-size: 11px;
  color: var(--crt-green-dim);
  margin-top: 6px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* Main Layout */
#main-layout {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

#display-section {
  flex: 1;
  min-width: 0;
}

/* Monitor Bezel */
#monitor-bezel {
  background: linear-gradient(145deg, #4a4340, #2a2520);
  border-radius: 20px;
  padding: 20px 20px 10px;
  margin: 0 auto 10px;
  max-width: 800px;
  box-shadow: 
    0 0 0 3px #1a1510,
    0 0 0 6px #5a534a,
    0 8px 30px rgba(0,0,0,0.6),
    inset 0 2px 4px rgba(255,255,255,0.05);
}

#crt-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.8), inset 0 0 20px rgba(0,0,0,0.5);
}

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

#scanlines {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 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;
}

#crt-glow {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  box-shadow: inset 0 0 80px rgba(51,255,51,0.05);
  pointer-events: none;
  border-radius: 12px;
}

#bezel-label {
  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--bg-bezel-light);
  letter-spacing: 6px;
  padding: 8px 0 2px;
  text-transform: uppercase;
}

/* Controls */
#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  background: var(--bg-panel);
  border-radius: 8px;
  margin-bottom: 10px;
  align-items: center;
  justify-content: center;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: rgba(255,255,255,0.03);
  border-radius: 6px;
}

.ctrl-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  padding: 8px 12px;
  border: 2px solid var(--crt-green-dim);
  background: var(--bg-dark);
  color: var(--crt-green);
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
  text-transform: uppercase;
  white-space: nowrap;
}

.ctrl-btn:hover {
  background: var(--crt-green-dark);
  border-color: var(--crt-green);
  box-shadow: 0 0 8px var(--crt-green-dim);
}

.ctrl-btn:active {
  transform: scale(0.95);
}

.ctrl-btn.small-btn {
  font-size: 7px;
  padding: 6px 8px;
}

.red-btn {
  border-color: var(--red-btn);
  color: #ff4444;
}

.red-btn:hover {
  background: #2a0808;
  border-color: var(--red-btn-hover);
  box-shadow: 0 0 8px rgba(204,34,34,0.4);
}

.power-on {
  border-color: var(--crt-green) !important;
  background: var(--crt-green-dark) !important;
  box-shadow: 0 0 12px var(--crt-green-dim);
}

.power-off {
  border-color: #444;
  color: #666;
}

.file-upload-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  padding: 8px 12px;
  border: 2px solid var(--crt-amber-dim);
  background: var(--bg-dark);
  color: var(--crt-amber);
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
  display: inline-block;
}

.file-upload-btn:hover {
  border-color: var(--crt-amber);
  box-shadow: 0 0 8px var(--crt-amber-dim);
}

#drop-zone {
  font-size: 9px;
  color: var(--text-dim);
  padding: 6px 10px;
  border: 1px dashed #333;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

#drop-zone.drag-over {
  border-color: var(--crt-amber);
  color: var(--crt-amber);
  background: rgba(255,170,0,0.05);
}

#file-info {
  font-size: 9px;
  color: var(--crt-amber);
}

.speed-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  color: var(--crt-green-dim);
}

#speed-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  background: var(--bg-dark);
  color: var(--crt-green);
  border: 1px solid var(--crt-green-dim);
  padding: 4px 6px;
  border-radius: 4px;
}

#volume-slider {
  width: 80px;
  accent-color: var(--crt-green);
}

/* Virtual Keyboard */
#keyboard-container {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 10px;
}

#virtual-keyboard {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-width: 800px;
  margin: 0 auto;
}

.kb-row {
  display: flex;
  gap: 3px;
  justify-content: center;
}

.kb-key {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  min-width: 32px;
  height: 28px;
  border: 1px solid #444;
  background: #222;
  color: #aaa;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
  user-select: none;
  padding: 0 4px;
}

.kb-key:hover {
  background: #333;
  border-color: #666;
}

.kb-key.pressed {
  background: var(--crt-green-dark);
  border-color: var(--crt-green);
  color: var(--crt-green);
  box-shadow: 0 0 6px var(--crt-green-dim);
}

.kb-key.wide {
  min-width: 56px;
}

.kb-key.extra-wide {
  min-width: 180px;
}

/* Debug Panel */
#debug-panel {
  width: 320px;
  min-width: 320px;
  background: var(--bg-panel);
  border-radius: 8px;
  transition: all 0.3s;
  overflow: hidden;
}

#debug-panel.collapsed {
  width: 40px;
  min-width: 40px;
}

#debug-panel.collapsed #debug-content {
  display: none;
}

#debug-panel.collapsed #debug-toggle {
  writing-mode: vertical-rl;
  padding: 12px 4px;
}

.debug-header {
  padding: 6px;
  text-align: right;
}

#debug-content {
  padding: 0 8px 8px;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}

.debug-section {
  margin-bottom: 10px;
}

.debug-section h3 {
  font-family: 'Press Start 2P', monospace;
  font-size: 7px;
  color: var(--crt-amber);
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.mono-display {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--crt-green);
  background: #0a0a0a;
  padding: 6px;
  border-radius: 4px;
  white-space: pre;
  overflow-x: auto;
  line-height: 1.4;
  text-shadow: 0 0 4px var(--crt-green-dim);
}

.mem-addr-input {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
}

.mem-addr-input label {
  font-size: 11px;
  color: var(--crt-amber);
}

.mem-addr-input input {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  width: 60px;
  background: #0a0a0a;
  color: var(--crt-green);
  border: 1px solid var(--crt-green-dim);
  padding: 2px 4px;
  border-radius: 3px;
  text-transform: uppercase;
}

/* Status Bar */
#status-bar {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--bg-panel);
  border-radius: 6px;
  margin-bottom: 10px;
  font-size: 10px;
  color: var(--crt-green-dim);
}

#status-state {
  font-weight: 700;
  color: var(--crt-green);
  text-shadow: 0 0 4px var(--crt-green-dim);
}

/* Footer */
footer {
  text-align: center;
  padding: 12px;
  font-size: 10px;
  color: #444;
}

footer a {
  color: var(--crt-green-dim);
  text-decoration: none;
  margin-left: 10px;
}

footer a:hover {
  color: var(--crt-green);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  color: var(--crt-amber);
  border: 1px solid var(--crt-amber-dim);
  padding: 10px 20px;
  border-radius: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  z-index: 1000;
  transition: opacity 0.3s;
  box-shadow: 0 0 20px rgba(255,170,0,0.2);
}

.toast.hidden { opacity: 0; pointer-events: none; }

/* Modal */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal.hidden { display: none; }

.modal-content {
  background: var(--bg-panel);
  border: 2px solid var(--crt-green-dim);
  border-radius: 12px;
  padding: 24px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 0 40px var(--crt-green-dark);
}

.modal-content h2 {
  font-family: 'Press Start 2P', monospace;
  font-size: 14px;
  color: var(--crt-green);
  margin-bottom: 14px;
  text-shadow: 0 0 8px var(--crt-green-dim);
}

.modal-content p {
  font-size: 12px;
  color: #bbb;
  margin-bottom: 10px;
  line-height: 1.6;
}

.modal-content strong {
  color: var(--crt-amber);
}

.modal-note {
  color: var(--crt-green-dim) !important;
  font-style: italic;
  border-top: 1px solid #333;
  padding-top: 10px;
}

.modal-content .ctrl-btn {
  margin-top: 10px;
}

/* CRT Power On Animation */
@keyframes crt-on {
  0% { transform: scaleY(0.005) scaleX(0.3); filter: brightness(10); }
  30% { transform: scaleY(0.005) scaleX(1); filter: brightness(5); }
  60% { transform: scaleY(1) scaleX(1); filter: brightness(2); }
  100% { transform: scaleY(1) scaleX(1); filter: brightness(1); }
}

.crt-power-on #canvas {
  animation: crt-on 0.6s ease-out;
}

/* Scrollbar */
#debug-content::-webkit-scrollbar {
  width: 4px;
}
#debug-content::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
#debug-content::-webkit-scrollbar-thumb {
  background: var(--crt-green-dark);
  border-radius: 2px;
}

/* Responsive */
@media (max-width: 900px) {
  #main-layout {
    flex-direction: column;
  }
  #debug-panel {
    width: 100% !important;
    min-width: 100% !important;
  }
  #debug-panel.collapsed {
    width: 100% !important;
    min-width: 100% !important;
    height: 40px;
  }
  .kb-key {
    min-width: 24px;
    height: 24px;
    font-size: 6px;
  }
  .kb-key.wide { min-width: 40px; }
  .kb-key.extra-wide { min-width: 100px; }
  header h1 { font-size: 14px; }
}