:root{--bg: #0d1117;--panel-bg: #161b22;--border: #30363d;--text: #c9d1d9;--text-dim: #8b949e;--accent: #58a6ff;--green: #3fb950;--red: #f85149;--orange: #d29922;--header-height: 48px;--footer-height: 200px;--detail-panel-width: 280px;--font-mono: "Cascadia Code", "Fira Code", "Consolas", "Menlo", monospace;--font-ui: system-ui, -apple-system, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:13px;line-height:1.5;height:100vh;overflow:hidden}#app{display:flex;flex-direction:column;height:100vh;overflow:hidden}header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 16px;background:var(--panel-bg);border-bottom:1px solid var(--border);flex-shrink:0}#header-left{display:flex;align-items:center;gap:14px}header h1{font-family:var(--font-mono);font-size:16px;font-weight:600;color:var(--accent);letter-spacing:.5px}#view-mode{display:inline-flex;align-items:center;gap:4px;padding:4px;border:1px solid var(--border);border-radius:999px;background:#58a6ff0d}.view-toggle{border:none;background:transparent;color:var(--text-dim);padding:5px 10px;border-radius:999px;font-family:var(--font-ui);font-size:11px;font-weight:600;cursor:pointer;transition:background .15s ease,color .15s ease,transform .15s ease}.view-toggle:hover{color:var(--text)}.view-toggle.is-active{background:linear-gradient(135deg,#60a5fae6,#2dd4bfb8);color:#04111f;transform:translateY(-1px)}#memory-config label{display:flex;align-items:center;gap:8px;color:var(--text-dim);font-size:12px}#memory-size{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:3px 6px;font-family:var(--font-mono);font-size:12px;cursor:pointer}#memory-size:focus{outline:none;border-color:var(--accent)}main{display:flex;flex-direction:row;flex:1;overflow:hidden;min-height:0}#workspace{flex:1;min-width:0;position:relative;overflow:auto;background:radial-gradient(circle at 20% 20%,rgba(56,189,248,.08),transparent 28%),#050816;overscroll-behavior:contain;scrollbar-gutter:stable}.workspace-view{position:absolute;top:0;right:0;bottom:0;left:0;display:none}.workspace-view.is-active{display:block}#grid-container{overflow:auto;background:var(--bg)}#grid-container::-webkit-scrollbar,#workspace::-webkit-scrollbar{width:8px;height:8px}#grid-container::-webkit-scrollbar-track,#workspace::-webkit-scrollbar-track{background:transparent}#grid-container::-webkit-scrollbar-thumb,#workspace::-webkit-scrollbar-thumb{background:var(--border);border-radius:999px}#hex-grid{display:block;width:100%;cursor:crosshair}#scene-container{position:relative;background:radial-gradient(circle at 50% 45%,rgba(96,165,250,.16),transparent 20%),radial-gradient(circle at 80% 20%,rgba(45,212,191,.08),transparent 24%),radial-gradient(circle at 18% 72%,rgba(251,146,60,.08),transparent 24%),#050816;overflow:hidden}#cpu-scene{display:block;width:100%;height:100%}#scene-overlay{position:absolute;left:22px;bottom:20px;width:min(360px,calc(100% - 44px));padding:14px 16px;border:1px solid rgba(96,165,250,.22);border-radius:18px;background:linear-gradient(180deg,#050816c7,#05081685);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 20px 48px #0000005c;pointer-events:none}#scene-badge{font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#67e8f9;margin-bottom:8px}#scene-stage{font-family:Georgia,Times New Roman,serif;font-size:28px;line-height:1.05;color:#f8fafc;margin-bottom:8px}#scene-detail{font-size:13px;line-height:1.55;color:#e2e8f0e0;margin-bottom:10px}#scene-telemetry{font-family:var(--font-mono);font-size:11px;color:#93c5fd}#detail-panel{width:var(--detail-panel-width);flex-shrink:0;background:var(--panel-bg);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden}#detail-panel::-webkit-scrollbar{width:4px}#detail-panel::-webkit-scrollbar-track{background:transparent}#detail-panel::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}#detail-panel section{padding:10px 12px;border-bottom:1px solid var(--border)}#detail-panel section:last-child{border-bottom:none}#detail-panel h3{font-family:var(--font-ui);font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--text-dim);margin-bottom:8px}#registers{display:grid;grid-template-columns:1fr 1fr;gap:4px 8px;font-family:var(--font-mono);font-size:11px}#registers .reg-entry{display:flex;justify-content:space-between;align-items:center;gap:4px}#registers .reg-name{color:var(--text-dim)}#registers .reg-value{color:var(--accent);font-weight:600}#registers .reg-value.changed{color:var(--orange)}#current-instruction{font-family:var(--font-mono);font-size:13px;color:var(--green);padding:6px 8px;background:var(--bg);border-radius:4px;border:1px solid var(--border);min-height:30px;word-break:break-all}#stack-view{font-family:var(--font-mono);font-size:11px;display:flex;flex-direction:column;gap:2px;height:120px;overflow-y:auto}#stack-view::-webkit-scrollbar{width:4px}#stack-view::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.stack-entry{display:flex;justify-content:space-between;padding:2px 4px;border-radius:2px}.stack-entry.stack-top{background:#58a6ff1a;color:var(--accent)}.stack-entry .stack-addr{color:var(--text-dim)}.stack-entry .stack-val{color:var(--text)}.stack-empty{color:var(--text-dim);display:flex;align-items:center;min-height:100%}#controls-section{display:flex;flex-direction:column;gap:10px}#transport{display:flex;gap:6px;flex-wrap:wrap}#transport button{flex:1;min-width:0;padding:5px 4px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:4px;font-family:var(--font-ui);font-size:12px;cursor:pointer;transition:background .1s,border-color .1s,color .1s;white-space:nowrap;text-align:center}#transport button:hover{background:var(--panel-bg);border-color:var(--accent);color:var(--accent)}#transport button:active{background:#58a6ff26}#transport button:disabled{opacity:.4;cursor:not-allowed;border-color:var(--border);color:var(--text-dim);background:var(--bg)}#btn-run{color:var(--green);border-color:var(--green)}#btn-run:hover{background:#3fb9501a;border-color:var(--green);color:var(--green)}#btn-run.running{color:var(--orange);border-color:var(--orange)}#btn-run.running:hover{background:#d299221a}#btn-reset{color:var(--red);border-color:var(--red)}#btn-reset:hover{background:#f851491a;border-color:var(--red);color:var(--red)}#speed-control{display:flex;align-items:center;gap:8px}#speed-control label{display:flex;align-items:center;gap:6px;color:var(--text-dim);font-size:11px;flex:1}#speed-slider{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:4px;background:var(--border);border-radius:2px;outline:none;cursor:pointer}#speed-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:12px;height:12px;border-radius:50%;background:var(--accent);cursor:pointer;transition:background .1s}#speed-slider::-webkit-slider-thumb:hover{background:#79b8ff}#speed-slider::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--accent);border:none;cursor:pointer}#speed-display{font-family:var(--font-mono);font-size:11px;color:var(--accent);min-width:48px;text-align:right}#cycle-display{font-family:var(--font-mono);font-size:11px;color:var(--text-dim);text-align:center}#cycle-count{color:var(--text);font-weight:600}#narration{font-family:var(--font-ui);font-size:12px;line-height:1.5;color:var(--text);padding:6px 8px;background:var(--bg);border-radius:4px;border:1px solid var(--border);height:96px;overflow-y:auto;overflow-x:hidden}#narration::-webkit-scrollbar{width:4px}#narration::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}#memory-stats,#display-stats{font-family:var(--font-mono);font-size:11px}#display-preview{margin-bottom:10px;padding:10px;border:1px solid var(--border);border-radius:8px;background:linear-gradient(180deg,#58a6ff0f,#58a6ff05)}#pixel-display{display:block;width:100%;height:auto;aspect-ratio:1 / 1;border:1px solid rgba(88,166,255,.45);border-radius:6px;background:#000;box-shadow:0 12px 28px #00000047;image-rendering:pixelated;image-rendering:crisp-edges;opacity:.35;transition:opacity .15s ease,box-shadow .15s ease,border-color .15s ease}#pixel-display.visible{opacity:1;border-color:#58a6ffb3;box-shadow:0 16px 32px #00000057}.stat-row{display:flex;justify-content:space-between;padding:2px 0}.stat-label{color:var(--text-dim)}.stat-value{color:var(--text);font-weight:600}.stat-bar{margin-top:6px;height:6px;background:var(--bg);border-radius:3px;overflow:hidden;border:1px solid var(--border)}.stat-bar-fill{height:100%;background:var(--accent);border-radius:3px;transition:width .15s ease}#error-section{background:#f8514914;border-top:1px solid var(--red)}#error-message{font-family:var(--font-mono);font-size:11px;color:var(--red);word-break:break-word}footer{height:var(--footer-height);flex-shrink:0;background:var(--panel-bg);border-top:1px solid var(--border);overflow:hidden}#editor-container{display:flex;flex-direction:column;height:100%}#editor-header{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;border-bottom:1px solid var(--border);flex-shrink:0;gap:12px}#editor-options{display:flex;align-items:center;gap:12px;flex-wrap:wrap}#editor-header label{display:flex;align-items:center;gap:8px;color:var(--text-dim);font-size:12px}#examples-dropdown{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:4px;padding:3px 6px;font-family:var(--font-ui);font-size:12px;cursor:pointer}#examples-dropdown:focus{outline:none;border-color:var(--accent)}#btn-assemble{padding:5px 14px;background:var(--accent);color:#0d1117;border:none;border-radius:4px;font-family:var(--font-ui);font-size:12px;font-weight:600;cursor:pointer;transition:background .1s,opacity .1s;white-space:nowrap}#btn-assemble:hover{background:#79b8ff}#btn-assemble:active{opacity:.85}#btn-assemble:disabled{opacity:.5;cursor:not-allowed}#code-editor{flex:1;width:100%;background:var(--bg);color:var(--text);border:none;border-bottom:1px solid var(--border);font-family:var(--font-mono);font-size:12px;line-height:1.6;padding:8px 12px;resize:none;outline:none;overflow-y:auto;-moz-tab-size:4;tab-size:4}#code-editor::placeholder{color:var(--text-dim);opacity:.6}#code-editor::-webkit-scrollbar{width:6px}#code-editor::-webkit-scrollbar-track{background:transparent}#code-editor::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}#assembler-errors{flex-shrink:0;font-family:var(--font-mono);font-size:11px;color:var(--red);padding:0 12px;max-height:40px;overflow-y:auto;background:var(--panel-bg)}#assembler-errors:not(:empty){padding:4px 12px;border-top:1px solid rgba(248,81,73,.3)}select{color-scheme:dark}option{background:var(--panel-bg);color:var(--text)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}#tribute{flex-shrink:0;text-align:center;padding:7px 16px;font-size:11px;color:var(--text-dim);opacity:.55;letter-spacing:.03em;background:var(--bg);border-top:1px solid var(--border)}#tribute em{font-style:italic;color:var(--text);opacity:.8}#tribute a{color:var(--text-dim);text-decoration:none}#tribute a:hover{color:var(--text);text-decoration:underline}