:root{--ink:#142033;--muted:#526176;--line:#dbe3ee;--soft:#f3f7fc;--soft2:#eaf2ff;--blue:#1d4ed8;--blue2:#0f3aa9;--green:#0e766e;--amber:#9a5a00;--white:#fff;--shadow:0 10px 28px rgba(20,32,51,.08);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.68}a{color:var(--blue);text-decoration-thickness:.08em;text-underline-offset:.18em}a:hover{color:var(--blue2)}img{max-width:100%;height:auto}.wrap{width:min(1500px,calc(100% - 40px));margin-inline:auto}.narrow{width:min(920px,100%);margin-inline:auto}.skip-link{position:absolute;left:-9999px;top:8px;background:#fff;padding:10px;z-index:100}.skip-link:focus{left:10px}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid 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var(--line);margin-top:32px;padding-top:8px}.source-core h2:first-child{margin-top:1.3rem}.related-list{display:grid;gap:10px}.related-list a{display:block;border:1px solid var(--line);padding:12px 14px;border-radius:11px;text-decoration:none;background:#fff}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.tag{background:#edf3fb;border-radius:999px;padding:5px 10px;font-size:.85rem;color:#31455f}.site-footer{background:#101a2a;color:#d8e2f0;padding:50px 0 24px;margin-top:60px}.site-footer a{color:#d8e2f0;text-decoration:none;display:block;margin:7px 0}.site-footer strong{color:#fff}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:34px}.footer-grid p{color:#afbdd0}.footer-bottom{border-top:1px solid #314059;margin-top:30px;padding-top:20px;color:#afbdd0}.tool-shell{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.8fr);gap:24px}.tool-form,.tool-output{border:1px solid 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