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rgba(236,72,153,.3);--glow-pink: var(--csstools-light-dark-toggle--22, rgba(219,39,119,.18));--csstools-light-dark-toggle--23: var(--csstools-color-scheme--light) #ff8a3d;--seq: var(--csstools-light-dark-toggle--23, #c2410c);--csstools-light-dark-toggle--24: var(--csstools-color-scheme--light) #2f1b13;--seq-bg: var(--csstools-light-dark-toggle--24, #fff1e6);--csstools-light-dark-toggle--25: var(--csstools-color-scheme--light) #2ee07a;--index: var(--csstools-light-dark-toggle--25, #15803d);--csstools-light-dark-toggle--26: var(--csstools-color-scheme--light) #0e2c1e;--index-bg: var(--csstools-light-dark-toggle--26, #e8f9ef);--csstools-light-dark-toggle--27: var(--csstools-color-scheme--light) #ff5c6c;--bad: var(--csstools-light-dark-toggle--27, #dc2626);--csstools-light-dark-toggle--28: var(--csstools-color-scheme--light) #33171f;--bad-bg: var(--csstools-light-dark-toggle--28, #fff0f0);--csstools-light-dark-toggle--29: var(--csstools-color-scheme--light) #ffb3bb;--bad-text: var(--csstools-light-dark-toggle--29, #a40e26);--csstools-light-dark-toggle--30: var(--csstools-color-scheme--light) #2ee07a;--good: var(--csstools-light-dark-toggle--30, #15803d);--csstools-light-dark-toggle--31: var(--csstools-color-scheme--light) #0e2c1e;--good-bg: var(--csstools-light-dark-toggle--31, #e8f9ef);--csstools-light-dark-toggle--32: var(--csstools-color-scheme--light) #8af5b5;--good-text: var(--csstools-light-dark-toggle--32, #116329);--csstools-light-dark-toggle--33: var(--csstools-color-scheme--light) #138a4b;--good-strong: var(--csstools-light-dark-toggle--33, #15803d);--csstools-light-dark-toggle--34: var(--csstools-color-scheme--light) #ffd23f;--gold: var(--csstools-light-dark-toggle--34, #a16207);--csstools-light-dark-toggle--35: var(--csstools-color-scheme--light) #33290f;--gold-bg: var(--csstools-light-dark-toggle--35, #fff6d6);--csstools-light-dark-toggle--36: var(--csstools-color-scheme--light) #a86f00;--gold-strong: var(--csstools-light-dark-toggle--36, #a16207);--csstools-light-dark-toggle--37: var(--csstools-color-scheme--light) rgba(143,176,255,.1);--tx-a-bg: var(--csstools-light-dark-toggle--37, rgba(79,70,229,.07));--csstools-light-dark-toggle--38: var(--csstools-color-scheme--light) rgba(255,138,61,.1);--tx-b-bg: var(--csstools-light-dark-toggle--38, rgba(194,65,12,.07));--csstools-light-dark-toggle--39: var(--csstools-color-scheme--light) #1a1000;--tx-b-text: var(--csstools-light-dark-toggle--39, #ffffff);--csstools-light-dark-toggle--40: var(--csstools-color-scheme--light) rgba(255,255,255,.12);--kbd-bg: var(--csstools-light-dark-toggle--40, rgba(0,0,0,.07));--csstools-light-dark-toggle--41: var(--csstools-color-scheme--light) #1a2040;--skeleton: var(--csstools-light-dark-toggle--41, #efe7dc);--csstools-light-dark-toggle--42: var(--csstools-color-scheme--light) rgba(0,0,0,.35);--shadow-sm: 0 1px 2px var(--csstools-light-dark-toggle--42, rgba(60,40,20,.07));--csstools-light-dark-toggle--43: var(--csstools-color-scheme--light) rgba(0,0,0,.7);--shadow-md: 0 14px 34px -14px var(--csstools-light-dark-toggle--43, rgba(60,40,20,.25));--csstools-light-dark-toggle--44: var(--csstools-color-scheme--light) rgba(46,224,122,.16);--backdrop: radial-gradient(900px 520px at 88% -8%, var(--glow-violet), transparent 62%), radial-gradient(760px 480px at -6% 28%, var(--glow-pink), transparent 60%), radial-gradient(820px 520px at 70% 108%, var(--csstools-light-dark-toggle--44, rgba(34,197,107,.14)), transparent 60%)}}@supports (color: light-dark(red,red)){:root{--bg: light-dark(#fbf8f3, #080a14);--bg-elev: light-dark(#ffffff, #10142a);--bg-elev-2: light-dark(#f6f0e8, #171c36);--border: light-dark(#ebe2d6, #262d4d);--border-strong: light-dark(#d9cbb9, #3a4372);--text: light-dark(#1d1a2b, #f1f3fb);--muted: light-dark(#5f5970, #a3abc6);--accent: light-dark(#4f46e5, #8fb0ff);--accent-strong: light-dark(#4338ca, #5a5ff0);--accent-soft: light-dark(rgba(79,70,229,.08), rgba(143,176,255,.12));--brand-orange: light-dark(#ff7a2e, #ff8a3d);--brand-yellow: light-dark(#ffc928, #ffd23f);--brand-green: light-dark(#22c56b, #2ee07a);--brand-ink-gradient: linear-gradient(95deg, light-dark(#e2550a, #ff9a4d), light-dark(#c98a00, #f5d34a) 48%, light-dark(#13994d, #4ade80));--pick-gradient: linear-gradient(110deg, light-dark(#4f46e5, #6366f1), light-dark(#9333ea, #a855f7) 55%, light-dark(#db2777, #ec4899));--glow-green: light-dark(rgba(34,197,107,.35), rgba(46,224,122,.45));--glow-orange: light-dark(rgba(255,122,46,.28), rgba(255,138,61,.38));--glow-violet: light-dark(rgba(147,51,234,.25), rgba(168,85,247,.42));--glow-pink: light-dark(rgba(219,39,119,.18), rgba(236,72,153,.3));--seq: light-dark(#c2410c, #ff8a3d);--seq-bg: light-dark(#fff1e6, #2f1b13);--index: light-dark(#15803d, #2ee07a);--index-bg: light-dark(#e8f9ef, #0e2c1e);--bad: light-dark(#dc2626, #ff5c6c);--bad-bg: light-dark(#fff0f0, #33171f);--bad-text: light-dark(#a40e26, #ffb3bb);--good: light-dark(#15803d, #2ee07a);--good-bg: light-dark(#e8f9ef, #0e2c1e);--good-text: light-dark(#116329, #8af5b5);--good-strong: light-dark(#15803d, #138a4b);--gold: light-dark(#a16207, #ffd23f);--gold-bg: light-dark(#fff6d6, #33290f);--gold-strong: light-dark(#a16207, #a86f00);--tx-a-bg: light-dark(rgba(79,70,229,.07), rgba(143,176,255,.1));--tx-b-bg: light-dark(rgba(194,65,12,.07), rgba(255,138,61,.1));--tx-b-text: light-dark(#ffffff, #1a1000);--kbd-bg: light-dark(rgba(0,0,0,.07), rgba(255,255,255,.12));--skeleton: light-dark(#efe7dc, #1a2040);--shadow-sm: 0 1px 2px light-dark(rgba(60,40,20,.07), rgba(0,0,0,.35));--shadow-md: 0 14px 34px -14px light-dark(rgba(60,40,20,.25), rgba(0,0,0,.7));--backdrop: radial-gradient(900px 520px at 88% -8%, var(--glow-violet), transparent 62%), radial-gradient(760px 480px at -6% 28%, var(--glow-pink), transparent 60%), radial-gradient(820px 520px at 70% 108%, light-dark(rgba(34,197,107,.14), rgba(46,224,122,.16)), transparent 60%)}}*{box-sizing:border-box}body{margin:0;background:var(--backdrop) fixed,var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}h1,h2,h3,h4{font-family:var(--display);line-height:1.2;letter-spacing:-.02em}::selection{--csstools-light-dark-toggle--45: var(--csstools-color-scheme--light) rgba(255,210,63,.35);background:var(--csstools-light-dark-toggle--45, rgba(255,201,40,.45));background:light-dark(rgba(255,201,40,.45),rgba(255,210,63,.35))}.app{max-width:1200px;margin:0 auto;padding:0 24px 48px}@media(max-width:560px){.app{padding:0 16px 32px}}a{color:var(--accent)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}a:hover{--csstools-light-dark-toggle--46: var(--csstools-color-scheme--light) #b8a6ff;color:var(--csstools-light-dark-toggle--46, #7c3aed);color:light-dark(#7c3aed,#b8a6ff)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:12px 16px}.brand{font-family:var(--display);font-size:21px;font-weight:700;display:flex;align-items:center;gap:10px;letter-spacing:-.03em;color:var(--text);text-decoration:none}.brand:hover{color:var(--text)}.brand-mark{flex:none;border-radius:9px;box-shadow:0 4px 16px -4px var(--glow-orange),0 4px 18px -6px var(--glow-green);transition:transform .25s cubic-bezier(.34,1.56,.64,1)}.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.08)}.page-loading{min-height:60vh;display:grid;place-items:center}.page-loading .spinner{width:22px;height:22px;border-width:3px}.not-found{margin-top:24px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.not-found h1{margin:0;font-size:22px}.not-found-actions{display:flex;gap:8px;flex-wrap:wrap}.topbar-right{display:flex;gap:8px;align-items:center;justify-content:flex-end;min-width:92px}@media(max-width:560px){.topbar{flex-wrap:wrap;padding:14px 0}.section-nav{order:3;width:100%}.section-nav .section-btn{flex:1;text-align:center}}button,a.button{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 14px;font-size:14px;cursor:pointer;box-shadow:var(--shadow-sm);font-family:inherit;line-height:1.4;transition:background .15s,border-color .15s,transform .15s,box-shadow .2s,filter .15s}a.button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}button:hover:not(:disabled),a.button:hover{border-color:var(--accent);color:var(--text)}button:active:not(:disabled){transform:translateY(1px) scale(.98)}button:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}button.primary,a.button.primary{background:var(--brand-gradient);border-color:transparent;color:var(--on-brand);font-weight:700;font-family:var(--display);letter-spacing:-.01em;box-shadow:0 6px 20px -8px var(--glow-orange),0 8px 24px -10px var(--glow-green),inset 0 1px #ffffff73}button.primary:hover:not(:disabled),a.button.primary:hover{color:var(--on-brand);filter:saturate(1.15) brightness(1.04);transform:translateY(-2px);box-shadow:0 10px 28px -8px var(--glow-orange),0 12px 34px -10px var(--glow-green),inset 0 1px #ffffff80}button.success{--csstools-light-dark-toggle--47: var(--csstools-color-scheme--light) #18a058;background:linear-gradient(135deg,var(--csstools-light-dark-toggle--47, #16a34a),var(--good-strong));border-color:transparent;color:#fff;font-weight:700;box-shadow:0 8px 22px -10px var(--glow-green)}@supports (color: light-dark(red,red)){button.success{background:linear-gradient(135deg,light-dark(#16a34a,#18a058),var(--good-strong))}}button.success:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 10px 28px -8px var(--glow-green)}button.success.is-busy:disabled{opacity:1;display:inline-flex;align-items:center;gap:8px}button.locked:disabled{opacity:1;background:transparent;color:var(--muted);border:1px dashed var(--border);box-shadow:none;font-weight:600}.locked-reason{font-weight:400}@media(max-width:560px){.locked-reason{display:block}}kbd{font-family:var(--mono);font-size:11px;background:var(--kbd-bg);border-radius:5px;padding:1px 6px;margin-left:6px;font-weight:500}select{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;font-size:14px;font-family:inherit;transition:border-color .12s}select:hover{border-color:var(--accent)}input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft),0 0 0 1px var(--accent)}select:focus-visible{border-color:var(--accent)}.tabs{display:inline-flex;gap:3px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:999px;padding:3px;margin-bottom:0}.tab{background:transparent;border:none;border-radius:999px;padding:7px 18px;color:var(--muted);font-weight:600;font-size:14px;box-shadow:none}.tab:hover{color:var(--text)}.tab.active{color:#fff;background:var(--pick-gradient);box-shadow:0 6px 18px -8px var(--glow-violet)}.tab.active:hover{transform:none;color:#fff;box-shadow:0 6px 18px -8px var(--glow-violet)}.status{font-size:13px;padding:10px 0;color:var(--muted);display:flex;align-items:center;gap:8px;min-height:32px}.status-ready{color:var(--good)}.status-error{color:var(--bad)}.spinner{width:12px;height:12px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;display:inline-block;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.spinner{animation-duration:2s}}.panel{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-md)}@media(max-width:560px){.panel{padding:16px}}.editor{border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:border-color .2s,box-shadow .2s}.editor:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft),0 10px 30px -14px var(--glow-violet)}.cm-editor .cm-content,.cm-editor .cm-gutters{font-family:var(--mono)}.toolbar{display:flex;gap:8px;margin:14px 0;flex-wrap:wrap}.error{background:var(--bad-bg);color:var(--bad-text);border:1px solid var(--bad);border-radius:var(--radius-sm);padding:12px 14px;font-size:13.5px;white-space:pre-wrap;margin-top:8px;display:flex;flex-direction:column;gap:6px}.error-text{font-family:var(--mono);font-size:13px}.error-hint{color:var(--text);font-family:inherit}.muted{color:var(--muted)}.hint{color:var(--muted);font-size:13px}.hint .warn,.warn{color:var(--seq)}.result-meta{font-size:13px;color:var(--muted);margin-bottom:8px}.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}table{border-collapse:collapse;width:100%;font-size:13px}th,td{text-align:left;padding:7px 12px;border-bottom:1px solid var(--border);white-space:nowrap}th{background:var(--bg-elev-2);position:sticky;top:0;font-weight:600}td{font-family:var(--mono);color:var(--text)}td.is-null{color:var(--muted);font-style:italic}tbody tr:hover td{background:var(--accent-soft)}.plan{margin-top:8px}.verdict{padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:12px;border:1px solid var(--border)}.verdict-seq{background:var(--seq-bg);border-color:var(--seq)}.verdict-index{background:var(--index-bg);border-color:var(--index)}.plan-tree{list-style:none;padding:0;margin:0}.plan-node{border-left:2px solid var(--border);padding:6px 0 6px 10px;margin-bottom:4px}.plan-node.is-seq{border-left-color:var(--seq)}.plan-node.is-index{border-left-color:var(--index);background:linear-gradient(90deg,var(--index-bg),transparent 70%);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.plan-node.is-seq{background:linear-gradient(90deg,var(--seq-bg),transparent 70%);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.plan-node-head{display:flex;gap:8px;align-items:baseline}.node-type{font-weight:700}.is-seq .node-type{color:var(--seq)}.is-index .node-type{color:var(--index);text-shadow:0 0 18px var(--glow-green)}.node-type[title]{cursor:help;text-decoration:underline dotted var(--border-strong);text-underline-offset:3px}.node-detail{color:var(--muted);font-size:13px}.plan-node-stats{display:flex;gap:14px;font-size:12.5px;color:var(--muted);margin-top:2px;flex-wrap:wrap}.plan-node-cond{margin-top:4px}.plan-node-cond code{display:block;font-family:var(--mono);font-size:12px;color:var(--muted)}.code-block{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;font-family:var(--mono);font-size:13px;overflow-x:auto;margin:8px 0 16px;white-space:pre-wrap}.compare{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:16px}.compare-col{min-width:0}.compare-col h4{margin:0 0 8px;font-size:14px}.compare-col .compare-col-title{font-size:13px;color:var(--muted);font-weight:600}.timing{color:var(--accent);font-family:var(--mono);font-weight:400;margin-left:6px}@media(max-width:720px){.compare{grid-template-columns:minmax(0,1fr)}}.plan-node-cond code{overflow-wrap:anywhere}.iso-controls{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;flex-wrap:wrap;margin-bottom:12px}.timeline{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin:12px 0;box-shadow:var(--shadow-sm)}.tl-row{display:flex;align-items:center;gap:12px;padding:7px 12px;border-bottom:1px solid var(--border)}.tl-row:last-child{border-bottom:none}.timeline{list-style:none;padding:0}.tl-row code{font-family:var(--mono);font-size:13px;overflow-wrap:anywhere}.tl-row{animation:solved-in .25s ease-out}.tl-tx{font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;min-width:42px;text-align:center}.tx-A{background:var(--tx-a-bg)}.tx-A .tl-tx{background:var(--accent-strong);color:#fff}.tx-B{background:var(--tx-b-bg)}.tx-B .tl-tx{background:var(--seq);color:var(--tx-b-text)}.outcome{border-radius:var(--radius);padding:12px 14px;border:1px solid var(--border);box-shadow:var(--shadow-sm)}.outcome.bad{background:var(--bad-bg);border-color:var(--bad)}.outcome.good{background:var(--good-bg);border-color:var(--good)}.outcome-head{font-weight:700;margin-bottom:4px}.outcome.bad .outcome-head{color:var(--bad-text)}.outcome.good .outcome-head{color:var(--good-text)}.outcome-result{font-family:var(--mono);font-size:13px;margin-bottom:6px}.outcome-explain{color:var(--muted);font-size:13.5px}.search-bar{display:flex;gap:8px;margin:14px 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