:root{--bg:#0b1120;--bg-soft:#0f172a;--panel:#131c31;--panel-2:#1a2540;--border:#243049;--text:#e2e8f0;--text-dim:#94a3b8;--text-faint:#64748b;--accent:#38bdf8;--accent-2:#818cf8;--tone-magic:#f472b6;--tone-header:#38bdf8;--tone-data:#34d399;--tone-meta:#fbbf24;--tone-end:#f87171;--radius:14px;--mono:ui-monospace,"SF Mono","JetBrains Mono","Fira Code",Menlo,Consolas,monospace;--sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--code-bg:#0a0f1e;--hero-grad-1:rgba(56,189,248,0.12);--hero-grad-2:rgba(129,140,248,0.12);--nav-bg:rgba(11,17,32,0.72)}[data-theme=light]{--bg:#f4f7fb;--bg-soft:#eef2f8;--panel:#ffffff;--panel-2:#eef2f8;--border:#d8e0ec;--text:#0f172a;--text-dim:#475569;--text-faint:#64748b;--accent:#0284c7;--accent-2:#4f46e5;--tone-magic:#db2777;--tone-header:#0284c7;--tone-data:#059669;--tone-meta:#d97706;--tone-end:#dc2626;--code-bg:#0f172a;--hero-grad-1:rgba(2,132,199,0.1);--hero-grad-2:rgba(79,70,229,0.1);--nav-bg:rgba(244,247,251,0.8)}html{transition:background-color .25s ease,color .25s ease}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased}body{min-height:100vh;background-image:radial-gradient(900px 500px at 12% -8%,var(--hero-grad-1),transparent 60%),radial-gradient(800px 500px at 95% 0,var(--hero-grad-2),transparent 55%);background-repeat:no-repeat}a{color:inherit;text-decoration:none}h1,h2,h3{line-height:1.2;margin:0}.container{max-width:1080px;margin:0 auto;padding:0 24px}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:30;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:var(--nav-bg);border-bottom:1px solid var(--border)}.nav-inner{gap:8px;height:60px}.brand,.nav-inner{display:flex;align-items:center}.brand{gap:10px;font-weight:700;letter-spacing:.2px;margin-right:auto}.brand-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-size:16px}.nav-link{padding:8px 14px;border-radius:999px;color:var(--text-dim);font-size:14px;font-weight:600;transition:all .15s ease;border:1px solid transparent}.nav-link:hover{color:var(--text);background:var(--panel)}.nav-link.active{color:var(--text);background:var(--panel-2);border-color:var(--border)}.theme-toggle{margin-left:6px;width:38px;height:38px;border-radius:999px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:16px;cursor:pointer;display:grid;place-items:center;transition:transform .15s ease,border-color .15s ease}.theme-toggle:hover{transform:scale(1.08);border-color:var(--accent)}.hero{padding:72px 0 36px;text-align:center}.hero h1{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:800;background:linear-gradient(120deg,var(--text),var(--accent) 60%,var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{color:var(--text-dim);max-width:640px;margin:18px auto 0;font-size:1.08rem;line-height:1.6}.pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);background:rgba(56,189,248,.1);border:1px solid rgba(56,189,248,.3);padding:6px 14px;border-radius:999px;margin-bottom:22px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));grid-gap:20px;gap:20px;margin:40px 0}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .18s ease,border-color .18s ease;display:block}.card:hover{transform:translateY(-4px);border-color:var(--accent)}.card-badge{display:inline-block;font-family:var(--mono);font-size:12px;font-weight:700;padding:4px 10px;border-radius:6px;margin-bottom:14px}.card h3{font-size:1.3rem;margin-bottom:8px}.card p{color:var(--text-dim);font-size:.92rem;line-height:1.55;margin:0 0 14px}.card .hex{font-family:var(--mono);font-size:12px;color:var(--text-faint)}.section{margin:56px 0}.section-title{display:flex;align-items:center;gap:12px;font-size:1.5rem;font-weight:700;margin-bottom:8px}.section-sub{margin:0 0 22px;line-height:1.6}.lead p,.section-sub{color:var(--text-dim)}.lead p{line-height:1.7;font-size:1rem;margin:0 0 14px}.format-head{display:flex;align-items:center;gap:18px;padding:28px 0 8px;flex-wrap:wrap}.format-glyph{width:64px;height:64px;border-radius:16px;display:grid;place-items:center;font-family:var(--mono);font-weight:800;font-size:20px;color:#0b1120}.format-head h1{font-size:2.2rem}.format-head .tag{color:var(--text-dim);margin-top:4px}.bytelayout{display:flex;flex-direction:column;gap:10px}.byterow{display:grid;grid-template-columns:200px 1fr;grid-gap:16px;gap:16px;align-items:stretch}.bytebox{position:relative;border-radius:10px;padding:14px 16px;background:var(--panel);border:1px solid var(--border);border-left-width:4px}.bytebox .blabel{font-weight:700;font-size:.95rem}.bytebox .bsize{font-family:var(--mono);font-size:11px;color:var(--text-faint);margin-top:2px}.bytebox .bhex{font-family:var(--mono);font-size:12px;margin-top:8px;color:var(--accent);word-break:break-all}.bytebox .bnote{color:var(--text-dim);font-size:.88rem;line-height:1.5;margin-top:6px}.tone-magic{border-left-color:var(--tone-magic)}.tone-header{border-left-color:var(--tone-header)}.tone-data{border-left-color:var(--tone-data)}.tone-meta{border-left-color:var(--tone-meta)}.tone-end{border-left-color:var(--tone-end)}.codeblock{background:var(--code-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin:16px 0}.codeblock-head{display:flex;align-items:center;gap:8px;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--panel)}.codeblock-head .dots{display:flex;gap:6px}.codeblock-head .dot{width:11px;height:11px;border-radius:50%}.dot.r{background:#ff5f56}.dot.y{background:#ffbd2e}.dot.g{background:#27c93f}.codeblock-head .ctitle{font-size:13px;color:var(--text-dim);font-family:var(--mono)}.codeblock pre{margin:0;padding:18px 20px;overflow-x:auto;font-family:var(--mono);font-size:13px;line-height:1.6;color:#cbd5e1}.code-caption{color:var(--text-faint);font-size:.82rem;font-style:italic;margin:-6px 0 18px;padding-left:4px}.ascii{background:var(--code-bg);padding:18px 20px;overflow-x:auto;font-family:var(--mono);font-size:12.5px;line-height:1.45;color:#a5b4fc;white-space:pre}.ascii,.tbl-wrap{border:1px solid var(--border);border-radius:var(--radius)}.tbl-wrap{overflow:hidden;margin:14px 0}table{width:100%;border-collapse:collapse;font-size:.9rem}thead th{background:var(--panel-2);text-align:left;padding:11px 16px;font-weight:700;color:var(--text);font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}tbody td{padding:10px 16px;border-top:1px solid var(--border);color:var(--text-dim)}tbody td:first-child{font-family:var(--mono);color:var(--accent);white-space:nowrap}tbody tr:hover td{background:rgba(56,189,248,.04)}.facts{display:grid;grid-gap:12px;gap:12px}.fact{display:flex;gap:12px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:14px 16px;color:var(--text-dim);line-height:1.55;font-size:.92rem}.fact .ico{flex-shrink:0}.callout{background:linear-gradient(120deg,rgba(56,189,248,.08),rgba(129,140,248,.08));border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;line-height:1.6;color:var(--text-dim)}.callout strong{color:var(--text)}.footer{border-top:1px solid var(--border);margin-top:72px;padding:28px 0;text-align:center;color:var(--text-faint);font-size:.85rem}.legend{display:flex;flex-wrap:wrap;gap:14px;margin:0 0 20px;font-size:.8rem;color:var(--text-dim)}.legend span{display:inline-flex;align-items:center;gap:6px}.legend i{width:12px;height:12px;border-radius:3px;display:inline-block}.bytestrip{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 20px}.bytecell{min-width:38px;padding:8px 6px;text-align:center;border-radius:8px;border:1px solid var(--border);background:var(--panel);font-family:var(--mono)}.bytecell .ch{font-size:15px;font-weight:700;color:var(--text)}.bytecell .hx{font-size:10px;color:var(--text-faint);margin-top:2px}.bytecell.hi{border-color:var(--accent);background:rgba(56,189,248,.12)}.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{font-family:var(--mono);font-size:12px;padding:4px 9px;border-radius:999px;border:1px solid var(--border);background:var(--panel-2);color:var(--text-dim);white-space:nowrap}.chip.new{border-color:var(--tone-data);color:var(--tone-data);background:rgba(52,211,153,.1)}.chip.out{border-color:var(--accent);color:var(--accent);background:rgba(56,189,248,.1);font-weight:700}.trace{display:grid;grid-gap:8px;gap:8px}.tstep{display:grid;grid-template-columns:44px 1fr;grid-gap:12px;gap:12px;align-items:center;padding:10px 14px;border:1px solid var(--border);border-radius:10px;background:var(--panel)}.tstep .tnum{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:13px;background:var(--panel-2);color:var(--text-dim)}.tstep.emit{border-left:4px solid var(--accent)}.tstep.extend{border-left:4px solid var(--tone-data)}.tstep .tbody{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.88rem;color:var(--text-dim)}.mono{font-family:var(--mono)}.arrow{color:var(--text-faint)}.crc-running{font-family:var(--mono);font-size:12px}.crc-running .v{color:var(--accent)}.bitgrid{display:flex;flex-wrap:wrap;gap:4px;font-family:var(--mono);font-size:12px}.bit{width:22px;height:26px;display:grid;place-items:center;border-radius:5px;border:1px solid var(--border);background:var(--panel)}.bit.one{background:rgba(56,189,248,.15);border-color:var(--accent);color:var(--accent);font-weight:700}.backlink{display:inline-flex;align-items:center;gap:6px;color:var(--text-dim);font-size:.88rem;font-weight:600;margin:24px 0 0}.backlink:hover{color:var(--accent)}@media (max-width:640px){.byterow{grid-template-columns:1fr}}