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

:root {
  --bg: #0a0a0e;
  --panel-bg: #111116;
  --panel-border: #222230;
  --text: #c8c8d0;
  --text-dim: #666680;
  --text-bright: #eeeef5;
  --accent: #00ddff;
  --cmd-00: #00cccc;
  --cmd-01: #cc44cc;
  --cmd-02: #cccc00;
  --cmd-03: #44cc44;
  --cmd-04: #666688;
  --cmd-05: #cc4444;
  --cmd-06: #cc8844;
  --cmd-fe: #888888;
  --cmd-ff: #ff2244;
  --btn-bg: #1a1a24;
  --btn-hover: #252535;
}

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

#scanlines {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.06) 2px,
    rgba(0,0,0,0.06) 4px
  );
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 14px 20px;
  background: linear-gradient(180deg, #0d0d14 0%, #08080c 100%);
  border-bottom: 1px solid var(--panel-border);
  position: relative;
}

header h1 {
  font-family: 'Share Tech Mono', monospace;
  font-size: 22px;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: 0 0 20px rgba(0,221,255,0.3);
}

header p {
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  letter-spacing: 1px;
}

#header-text { text-align: center; }

/* Main Layout */
#main-layout {
  display: flex;
  gap: 1px;
  background: var(--panel-border);
  min-height: calc(100vh - 130px);
}

.panel {
  background: var(--panel-bg);
  display: flex;
  flex-direction: column;
}

#panel-source { flex: 0 0 28%; min-width: 260px; }
#panel-output { flex: 1 1 40%; }
#panel-hex { flex: 0 0 32%; min-width: 280px; }

.panel-header {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-dim);
  padding: 10px 14px;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(0,0,0,0.3);
}

.panel-body {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
}

/* Drop Zone */
#drop-zone {
  position: relative;
  border: 1px dashed var(--panel-border);
  border-radius: 4px;
  margin-bottom: 12px;
  cursor: pointer;
  overflow: hidden;
  aspect-ratio: 1;
  max-width: 100%;
}

#drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0,221,255,0.05);
}

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

#drop-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 6px;
  text-align: center;
  font-size: 10px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.6);
}

/* Controls */
.control-group {
  margin-bottom: 10px;
}

.control-group label {
  display: block;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.control-group select,
.control-group input[type="range"] {
  width: 100%;
  background: var(--btn-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 3px;
  font-family: inherit;
  font-size: 12px;
}

.control-group input[type="range"] {
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  cursor: pointer;
  padding: 0;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.toggle-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text);
  margin-bottom: 4px;
  cursor: pointer;
}

/* Buttons */
.btn-primary {
  width: 100%;
  padding: 10px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  background: linear-gradient(180deg, #003844, #001820);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.2s;
  text-shadow: 0 0 10px rgba(0,221,255,0.4);
  margin-bottom: 8px;
}

.btn-primary:hover {
  background: linear-gradient(180deg, #004855, #002530);
  box-shadow: 0 0 20px rgba(0,221,255,0.2);
}

.btn-secondary {
  padding: 6px 12px;
  font-family: inherit;
  font-size: 11px;
  background: var(--btn-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-secondary:hover { background: var(--btn-hover); border-color: var(--text-dim); }

.btn-sm {
  padding: 4px 10px;
  font-family: inherit;
  font-size: 11px;
  background: var(--btn-bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 3px;
  cursor: pointer;
}

.btn-sm:hover { background: var(--btn-hover); }

/* Palette Grid */
#palette-grid {
  display: grid;
  grid-template-columns: repeat(32, 1fr);
  gap: 0;
  border: 1px solid var(--panel-border);
  border-radius: 2px;
  overflow: hidden;
}

.palette-swatch {
  aspect-ratio: 1;
  cursor: crosshair;
  min-width: 0;
}

/* Canvas Output */
#canvas-container {
  position: relative;
  border: 1px solid var(--panel-border);
  margin: 0 auto;
  max-width: 512px;
  aspect-ratio: 1;
}

#output-canvas, #overlay-canvas {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  display: block;
  position: absolute;
  top: 0; left: 0;
}

#overlay-canvas { pointer-events: none; }

#playback-bar {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

#progress-container {
  flex: 1;
  height: 6px;
  background: var(--btn-bg);
  border-radius: 3px;
  overflow: hidden;
  min-width: 60px;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.1s;
}

/* Stats */
#stats-bar {
  display: flex;
  gap: 2px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.stat {
  flex: 1;
  min-width: 70px;
  background: rgba(0,0,0,0.4);
  padding: 6px 8px;
  border-radius: 3px;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.stat-val {
  display: block;
  font-size: 13px;
  color: var(--text-bright);
  font-weight: 700;
}

#output-actions {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* Hex Viewer */
#hex-viewer {
  background: #08080c;
  border: 1px solid var(--panel-border);
  border-radius: 3px;
  font-size: 11px;
  line-height: 1.6;
  overflow-y: auto;
  max-height: 50vh;
  padding: 8px;
}

#hex-content {
  white-space: pre;
  font-family: 'IBM Plex Mono', monospace;
}

.hex-line { cursor: pointer; }
.hex-line:hover { background: rgba(255,255,255,0.04); }
.hex-line.highlighted { background: rgba(0,221,255,0.1); }

.hex-offset { color: var(--text-dim); }
.hex-ascii { color: #556; }

.hex-byte { padding: 0 1px; border-radius: 1px; }
.hb-00 { color: var(--cmd-00); }
.hb-01 { color: var(--cmd-01); }
.hb-02 { color: var(--cmd-02); }
.hb-03 { color: var(--cmd-03); }
.hb-04 { color: var(--cmd-04); }
.hb-05 { color: var(--cmd-05); }
.hb-06 { color: var(--cmd-06); }
.hb-fe { color: var(--cmd-fe); }
.hb-ff { color: var(--cmd-ff); }
.hb-data { color: #8888aa; }

/* Command Legend */
#command-legend {
  margin-bottom: 10px;
  padding: 8px;
  background: rgba(0,0,0,0.3);
  border-radius: 3px;
}

.legend-title {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.legend-item {
  font-size: 10px;
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.cmd-badge {
  display: inline-block;
  padding: 1px 4px;
  border-radius: 2px;
  font-weight: 700;
  font-size: 10px;
  min-width: 36px;
  text-align: center;
}

.cmd-00 { background: rgba(0,204,204,0.15); color: var(--cmd-00); }
.cmd-01 { background: rgba(204,68,204,0.15); color: var(--cmd-01); }
.cmd-02 { background: rgba(204,204,0,0.15); color: var(--cmd-02); }
.cmd-03 { background: rgba(68,204,68,0.15); color: var(--cmd-03); }
.cmd-04 { background: rgba(102,102,136,0.15); color: var(--cmd-04); }
.cmd-05 { background: rgba(204,68,68,0.15); color: var(--cmd-05); }
.cmd-06 { background: rgba(204,136,68,0.15); color: var(--cmd-06); }
.cmd-fe { background: rgba(136,136,136,0.15); color: var(--cmd-fe); }
.cmd-ff { background: rgba(255,34,68,0.15); color: var(--cmd-ff); }

/* Collapsible */
.collapsible-header {
  font-size: 11px;
  color: var(--accent);
  cursor: pointer;
  padding: 6px 0;
  margin-bottom: 4px;
}

.collapsible-header:hover { color: var(--text-bright); }

.collapsible-content {
  display: none;
  padding: 8px;
  background: rgba(0,0,0,0.3);
  border-radius: 3px;
  font-size: 10px;
  margin-bottom: 10px;
  line-height: 1.8;
  overflow-x: auto;
}

.collapsible-content.open { display: block; }

.header-field {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  padding: 2px 0;
}

.header-field .hf-label { color: var(--text-dim); }
.header-field .hf-val { color: var(--accent); }

/* Tooltip */
.tooltip {
  display: none;
  position: absolute;
  background: #1a1a24;
  border: 1px solid var(--panel-border);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 10px;
  color: var(--text);
  z-index: 100;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.open { display: flex; }

.modal-content {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  width: 90vw;
  max-width: 900px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 20px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.modal-header h2 {
  font-family: 'Share Tech Mono', monospace;
  font-size: 16px;
  color: var(--accent);
  letter-spacing: 1px;
}

.modal-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 11px;
}

.modal-controls input[type="range"] {
  width: 200px;
}

#pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: 3px;
}

.pattern-cell {
  aspect-ratio: 1;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 2px;
  image-rendering: pixelated;
}

.pattern-cell:hover { border-color: var(--accent); }
.pattern-cell canvas { width: 100%; height: 100%; image-rendering: pixelated; }

#pattern-detail {
  margin-top: 12px;
  padding: 12px;
  background: rgba(0,0,0,0.4);
  border-radius: 4px;
  display: none;
}

#pattern-detail.visible { display: flex; gap: 16px; align-items: flex-start; }

#pattern-detail canvas {
  image-rendering: pixelated;
  border: 1px solid var(--panel-border);
}

#pattern-detail .pd-info {
  font-size: 11px;
  line-height: 1.8;
}

/* Footer */
footer {
  padding: 12px 20px;
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  border-top: 1px solid var(--panel-border);
  background: var(--panel-bg);
}

footer a {
  color: var(--accent);
  text-decoration: none;
  margin-left: 16px;
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* Video Controls */
#video-controls {
  background: rgba(0,221,255,0.04);
  border: 1px solid rgba(0,221,255,0.15);
  border-radius: 4px;
  padding: 8px;
}

#video-controls label {
  color: var(--accent) !important;
  font-weight: 500;
}

#video-info {
  line-height: 1.5;
}

#video-frame-actions .btn-sm {
  font-size: 10px;
  padding: 3px 8px;
}

/* Video Comparison */
#video-compare {
  border-top: 1px solid var(--panel-border);
  padding-top: 8px;
}

#compare-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
}

#compare-canvases {
  display: flex;
  gap: 4px;
}

.compare-pane {
  flex: 1;
  text-align: center;
}

.compare-pane canvas {
  width: 100%;
  image-rendering: pixelated;
  border: 1px solid var(--panel-border);
  border-radius: 2px;
  display: block;
}

.compare-label {
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 3px;
}

#compare-wipe-container canvas {
  width: 100%;
  image-rendering: pixelated;
  border: 1px solid var(--panel-border);
  border-radius: 2px;
  display: block;
}

#compare-metrics {
  display: flex;
  gap: 2px;
  margin-top: 6px;
}

#compare-metrics .stat {
  flex: 1;
  min-width: 55px;
  padding: 4px 6px;
}

#compare-metrics .stat-val {
  font-size: 12px;
}

#psnr-graph-container {
  position: relative;
}

/* Encoding animation */
@keyframes encode-pulse {
  0% { box-shadow: 0 0 0 rgba(0,221,255,0); }
  50% { box-shadow: 0 0 20px rgba(0,221,255,0.3); }
  100% { box-shadow: 0 0 0 rgba(0,221,255,0); }
}

.encoding #encode-btn { animation: encode-pulse 0.8s infinite; }

/* Responsive */
@media (max-width: 1024px) {
  #main-layout {
    flex-direction: column;
  }
  #panel-source, #panel-output, #panel-hex {
    flex: none;
    min-width: 0;
  }
  #hex-viewer { max-height: 30vh; }
  #palette-grid { grid-template-columns: repeat(32, 1fr); }
}

@media (max-width: 600px) {
  header h1 { font-size: 16px; letter-spacing: 1px; }
  header p { font-size: 9px; }
  #header-dither, #header-dither-r { display: none; }
  #stats-bar { flex-direction: column; }
  .stat { min-width: 0; }
  #pattern-grid { grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); }
}