:root {
  --bg: #0a0a0a;
  --bg2: #111111;
  --bg3: #1a1a1a;
  --fg: #00ff41;
  --fg-dim: #00aa2a;
  --fg-bright: #33ff66;
  --accent: #00ff41;
  --error: #ff3333;
  --warning: #ffaa00;
  --border: #003300;
  --gutter-bg: #050505;
  --highlight-line: rgba(0, 255, 65, 0.05);
  --selection: rgba(0, 255, 65, 0.15);
  --ring0: #ff4444;
  --ring1: #ff8800;
  --ring2: #ffcc00;
  --ring3: #44ff44;
  --sys286: #00ffff;
  --undoc: #ff6b9d;
  --undoc-bg: rgba(255, 107, 157, 0.08);
  --undoc-border: rgba(255, 107, 157, 0.4);
}

[data-theme="amber"] {
  --fg: #ffb000;
  --fg-dim: #aa7500;
  --fg-bright: #ffcc44;
  --accent: #ffb000;
  --border: #332200;
  --highlight-line: rgba(255, 176, 0, 0.05);
  --selection: rgba(255, 176, 0, 0.15);
}

[data-theme="blue"] {
  --bg: #0a0e1a;
  --bg2: #0f1525;
  --bg3: #151d30;
  --fg: #4fc3f7;
  --fg-dim: #2a7da8;
  --fg-bright: #80d8ff;
  --accent: #4fc3f7;
  --border: #0a2540;
  --gutter-bg: #070b14;
  --highlight-line: rgba(79, 195, 247, 0.05);
  --selection: rgba(79, 195, 247, 0.15);
}

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

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

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

.scanlines::after {
  content: '';
  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);
}

.glow { text-shadow: 0 0 8px var(--fg), 0 0 2px var(--fg); }
.glow-subtle { text-shadow: 0 0 4px var(--fg-dim); }

@keyframes blink { 0%, 50% { opacity: 1; } 51%, 100% { opacity: 0; } }
.blink { animation: blink 1s infinite; }

@keyframes protGlow {
  0%, 100% { box-shadow: 0 0 4px var(--sys286), 0 0 8px var(--sys286); }
  50% { box-shadow: 0 0 8px var(--sys286), 0 0 16px var(--sys286); }
}

.prot-mode-badge {
  animation: protGlow 2s infinite;
  border: 1px solid var(--sys286);
  color: var(--sys286);
  padding: 1px 6px;
  font-size: 9px;
  border-radius: 3px;
  letter-spacing: 1px;
}

@keyframes undocGlow {
  0%, 100% { box-shadow: 0 0 4px var(--undoc), 0 0 8px rgba(255,107,157,0.3); }
  50% { box-shadow: 0 0 8px var(--undoc), 0 0 16px rgba(255,107,157,0.5); }
}

.undoc-badge {
  animation: undocGlow 2s infinite;
  border: 1px solid var(--undoc);
  color: var(--undoc);
  padding: 1px 6px;
  font-size: 9px;
  border-radius: 3px;
  letter-spacing: 1px;
  background: rgba(255,107,157,0.1);
}

.undoc-toggle-active {
  background: rgba(255, 50, 50, 0.15) !important;
  border-color: #ff4444 !important;
  box-shadow: 0 0 8px rgba(255,50,50,0.3);
}

@keyframes ringPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.ring-indicator-active { animation: ringPulse 1.5s infinite; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-dim); }

.editor-textarea {
  background: transparent;
  color: transparent;
  caret-color: var(--fg);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 20px;
  resize: none;
  outline: none;
  border: none;
  padding: 0;
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
  tab-size: 8;
  -moz-tab-size: 8;
}

.editor-textarea::selection { background: var(--selection); color: var(--fg); }

.syntax-layer {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 20px;
  white-space: pre;
  pointer-events: none;
}

.syn-mnemonic { color: #ff6b6b; font-weight: 600; }
.syn-register { color: #ffd93d; }
.syn-number { color: #6bcb77; }
.syn-label { color: #4d96ff; }
.syn-comment { color: #555555; font-style: italic; }
.syn-directive { color: #c084fc; font-weight: 500; }
.syn-string { color: #6bcb77; }
.syn-keyword { color: #ff922b; }
.syn-punct { color: var(--fg-dim); }
.syn-prefix { color: #ff6b9d; }
.syn-ptr { color: #ff922b; font-weight: 500; }
.syn-186 { color: #22d3ee; font-weight: 600; text-shadow: 0 0 4px rgba(34,211,238,0.4); }
.syn-286 { color: #00ffff; font-weight: 600; text-shadow: 0 0 4px rgba(0,255,255,0.4); }
.syn-486 { color: #e040fb; font-weight: 600; text-shadow: 0 0 4px rgba(224,64,251,0.4); }
.syn-386 { color: #ff9500; font-weight: 600; text-shadow: 0 0 4px rgba(255,149,0,0.4); }
.syn-pentium { color: #76ff03; font-weight: 600; text-shadow: 0 0 4px rgba(118,255,3,0.4); }
.syn-sysreg { color: #ff44ff; }
.syn-undoc { color: #ff6b9d; font-weight: 600; text-shadow: 0 0 6px rgba(255,107,157,0.5); }

[data-theme="amber"] .syn-mnemonic { color: #ff6b6b; }
[data-theme="amber"] .syn-register { color: #ffd93d; }
[data-theme="amber"] .syn-number { color: #6bcb77; }
[data-theme="amber"] .syn-label { color: #4d96ff; }
[data-theme="amber"] .syn-directive { color: #c084fc; }

[data-theme="blue"] .syn-mnemonic { color: #ff6b6b; }
[data-theme="blue"] .syn-register { color: #ffd93d; }
[data-theme="blue"] .syn-number { color: #6bcb77; }
[data-theme="blue"] .syn-label { color: #80d8ff; }
[data-theme="blue"] .syn-directive { color: #c084fc; }

.retro-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--fg);
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 1px 1px 0 var(--border);
}

.retro-btn:hover { background: var(--bg3); border-color: var(--fg-dim); text-shadow: 0 0 4px var(--fg); }
.retro-btn:active { box-shadow: none; transform: translate(1px, 1px); }
.retro-btn-primary { border-color: var(--fg-dim); background: rgba(0, 255, 65, 0.1); }

[data-theme="amber"] .retro-btn-primary { background: rgba(255, 176, 0, 0.1); }
[data-theme="blue"] .retro-btn-primary { background: rgba(79, 195, 247, 0.1); }

.hex-byte { cursor: pointer; padding: 0 1px; border-radius: 1px; transition: background 0.15s; }
.hex-byte:hover { background: var(--selection); }
.hex-byte.highlighted { background: var(--selection); text-shadow: 0 0 6px var(--fg); }
.hex-byte.two-byte-opcode { background: rgba(0, 255, 255, 0.08); }
.hex-byte.undoc-byte { background: var(--undoc-bg); }

.opcode-cell {
  font-size: 9px;
  padding: 2px 3px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
}

.opcode-cell:hover { z-index: 10; border-color: var(--fg); box-shadow: 0 0 6px var(--fg-dim); }

.cat-misc { background: rgba(128,128,128,0.15); }
.cat-jump { background: rgba(66,133,244,0.15); }
.cat-move { background: rgba(0,200,83,0.15); }
.cat-string { background: rgba(171,71,188,0.15); }
.cat-arith { background: rgba(255,152,0,0.15); }
.cat-group { background: rgba(255,235,59,0.12); }
.cat-prefix { background: rgba(255,64,129,0.15); }
.cat-empty { background: rgba(0,0,0,0.3); }
.cat-sys286 { background: rgba(0,255,255,0.12); border-color: rgba(0,255,255,0.3); }
.cat-undoc { background: rgba(255,107,157,0.12); border: 1px dashed var(--undoc); }

.toggle-track {
  width: 32px; height: 16px; border-radius: 8px;
  background: var(--bg3); border: 1px solid var(--border);
  cursor: pointer; position: relative; transition: all 0.2s;
}
.toggle-track.active { background: rgba(0, 255, 65, 0.2); border-color: var(--fg-dim); }
.toggle-knob {
  width: 12px; height: 12px; border-radius: 6px;
  background: var(--fg-dim); position: absolute; top: 1px; left: 1px; transition: all 0.2s;
}
.toggle-track.active .toggle-knob { left: 17px; background: var(--fg); }

.retro-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; padding: 4px 8px;
  border: 1px solid var(--border); background: var(--bg2); color: var(--fg);
  cursor: pointer; outline: none; appearance: none; -webkit-appearance: none;
  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 4-4z' fill='%2300aa2a'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 6px center; padding-right: 20px;
}
.retro-select option { background: var(--bg2); color: var(--fg); }

.warning-icon { color: #ffaa00; font-size: 12px; }
.undoc-icon { color: var(--undoc); font-size: 10px; }

.undoc-line-border { border-left: 2px dotted var(--undoc) !important; }

@media (max-width: 768px) {
  .main-panels { flex-direction: column !important; }
  .sm-hide { display: none !important; }
}

@keyframes toastSlide { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastFade { 0%, 80% { opacity: 1; } 100% { opacity: 0; } }
.save-toast { animation: toastSlide 0.25s ease-out, toastFade 2.5s ease-in forwards; }