:root{--bg:#fbfbfa;--fg:#1a1a1a;--muted:#6b6b6b;--line:#e3e3e0;--pass:#1a7f37;--fail:#b42318;--warn:#9a6700;--mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace}@media (prefers-color-scheme:dark){:root{--bg:#16161a;--fg:#ededed;--muted:#9a9a9a;--line:#2c2c31;--pass:#4ac26b;--fail:#f0776a;--warn:#d4a72c}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font:16px/1.55 -apple-system,BlinkMacSystemFont,Segoe UI,Inter,sans-serif}main{max-width:46rem;margin:0 auto;padding:2.5rem 1.25rem 4rem}header h1{letter-spacing:-.01em;margin:0 0 .25rem;font-size:1.6rem}header p{color:var(--muted);margin:0 0 1rem}nav{border-bottom:1px solid var(--line);gap:1.25rem;margin:0 0 2.5rem;padding-bottom:.75rem;font-size:.9rem;font-weight:550;display:flex}nav a{color:var(--muted);text-decoration:none}nav a:hover,nav a.active{color:var(--fg)}h2{margin:0 0 .5rem;font-size:1.2rem}h3{margin:1.5rem 0 .5rem;font-size:1rem}.lede{color:var(--muted);margin:0 0 1.5rem}form{border:1px solid var(--line);border-radius:10px;gap:1rem;padding:1.25rem;display:grid}label{gap:.35rem;font-size:.9rem;font-weight:550;display:grid}.hint{color:var(--muted);font-weight:400}input,select{border:1px solid var(--line);background:var(--bg);color:var(--fg);font:inherit;border-radius:6px;padding:.5rem .6rem}input[type=text],input:not([type]){font-family:var(--mono);font-size:.85rem}button{background:var(--fg);color:var(--bg);font:inherit;cursor:pointer;border:0;border-radius:6px;justify-self:start;padding:.55rem 1.1rem;font-weight:600}button:disabled{opacity:.45;cursor:not-allowed}form details{border-top:1px dashed var(--line);gap:1rem;padding-top:.75rem;display:grid}form summary{cursor:pointer;color:var(--muted);font-size:.9rem;font-weight:550}.result{margin-top:2rem}.verdict{border-radius:999px;padding:.35rem .8rem;font-size:.9rem;font-weight:650;display:inline-block}.verdict.pass{background:color-mix(in srgb, var(--pass) 15%, transparent);color:var(--pass)}.verdict.fail{background:color-mix(in srgb, var(--fail) 15%, transparent);color:var(--fail)}dl{grid-template-columns:max-content 1fr;gap:.25rem 1rem;margin:1rem 0;font-size:.9rem;display:grid}dt{color:var(--muted)}dd{overflow-wrap:anywhere;margin:0}.mono{font-family:var(--mono);font-size:.82rem}.checks{gap:.4rem;margin:1rem 0;padding:0;font-size:.9rem;list-style:none;display:grid}.checks li{grid-template-columns:1.25rem 1fr;align-items:start;display:grid}.checks .icon{font-weight:700}.checks .pass .icon{color:var(--pass)}.checks .fail,.checks .fail .icon{color:var(--fail)}.checks .warn,.checks .warn .icon{color:var(--warn)}.checks .info{color:var(--muted)}.checks em{color:var(--muted);font-style:normal;font-family:var(--mono);overflow-wrap:anywhere;font-size:.78rem;display:block}article{border-top:1px solid var(--line);padding-top:.5rem}.error{color:var(--fail)}.footnote{border-top:1px solid var(--line);color:var(--muted);margin-top:2rem;padding-top:1rem;font-size:.85rem}footer{border-top:1px solid var(--line);color:var(--muted);margin-top:3rem;padding-top:1rem;font-size:.85rem}footer a{color:inherit}.about h3{margin:2rem 0 .6rem;font-size:1.05rem}.about p{margin:0 0 .9rem;font-size:.95rem}.about ul{gap:.4rem;margin:0 0 .9rem;padding-left:1.25rem;font-size:.95rem;display:grid}.about a{color:inherit}.chain{gap:0;margin:1.75rem 0;display:grid}.chain div{border:1px solid var(--line);border-radius:10px;gap:.1rem;padding:.7rem 1rem;display:grid}.chain div+div{margin-top:1.4rem;position:relative}.chain div+div:before{content:"↓";color:var(--muted);line-height:1.4rem;position:absolute;top:-1.4rem;left:1rem}.chain strong{font-size:.95rem}.chain span{color:var(--muted);font-size:.85rem}