:root{--ink:#172026;--muted:#5c6870;--line:#d8dee2;--panel:#f4f7f8;--accent:#0b5f6a;--accent-soft:#e8f3f4;--warn:#7a4b00;--warn-soft:#fff5df;--verify:#6a374d;--verify-soft:#faedf2;--max:1100px}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:var(--accent);text-underline-offset:3px}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}.site-header{border-bottom:1px solid var(--line);background:#fff}.header-inner{min-height:60px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:800;color:var(--ink);text-decoration:none}.brand span{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);border:1px solid #a8ced2;border-radius:999px;padding:2px 7px;margin-left:6px}.hero{padding:72px 0 34px;max-width:850px}.eyebrow{font-weight:800;color:var(--accent);letter-spacing:.12em;font-size:.76rem;margin-bottom:8px}.hero h1,.article h1{font-size:clamp(2.15rem,6vw,4.1rem);letter-spacing:-.045em;line-height:1.02;margin:.15em 0 .35em}.lede{font-size:1.18rem;color:#344149;max-width:760px}.scope-note{background:var(--panel);border-left:4px solid var(--accent);padding:14px 16px;border-radius:4px}.checker{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;align-items:start}.step{border:1px solid var(--line);border-radius:14px;padding:24px;background:#fff}.step h2,.explain h2,.coverage h2,.sources h2{margin-top:0;letter-spacing:-.02em}.search-label{display:block;font-weight:700;margin:16px 0 7px}input[type=search],input[type=text]{width:100%;font:inherit;padding:12px 13px;border:1px solid #aeb8be;border-radius:9px;background:#fff}.device-groups{margin-top:18px;max-height:760px;overflow:auto;padding-right:4px}.device-group{border:0;padding:0;margin:0 0 20px}.device-group legend{font-weight:800;font-size:.92rem;margin-bottom:7px}.device-option{display:flex;gap:10px;align-items:flex-start;padding:10px 8px;border-radius:8px;cursor:pointer}.device-option:hover{background:var(--panel)}.device-option input{margin-top:5px}.device-option span{display:flex;flex-direction:column}.device-option small{color:var(--muted);margin-top:2px}.unlisted-box{border-top:1px solid var(--line);padding-top:18px}.unlisted-row{display:grid;grid-template-columns:1fr auto;gap:8px;margin-top:8px}.unlisted-box p{font-size:.9rem;color:var(--muted)}button{font:inherit;font-weight:700;border-radius:8px;border:1px solid transparent;padding:10px 13px;cursor:pointer}.secondary{border-color:#a9b4ba;background:#fff;color:var(--ink)}.secondary:hover{background:var(--panel)}.results-step{position:sticky;top:82px;max-height:calc(100vh - 98px);overflow:auto}.results-heading{display:flex;justify-content:space-between;gap:18px;align-items:start}.results-heading p{color:var(--muted);margin:.25em 0}.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.system-summary{background:var(--accent-soft);border:1px solid #bdd9dc;border-radius:10px;padding:16px;margin:18px 0}.system-summary h3{margin-top:0}.summary-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.summary-stats div{background:#fff;border-radius:8px;padding:10px}.summary-stats strong{font-size:1.35rem;display:block}.summary-stats span{font-size:.78rem;color:var(--muted)}.result-card{border-top:1px solid var(--line);padding:17px 0}.result-top{display:flex;gap:12px;align-items:start;justify-content:space-between}.result-card h3{margin:0;font-size:1rem}.result-card p{margin:.55em 0}.badge{white-space:nowrap;border-radius:999px;padding:4px 8px;font-size:.72rem;font-weight:800}.badge.gateway{background:var(--warn-soft);color:var(--warn)}.badge.direct{background:var(--accent-soft);color:var(--accent)}.badge.special{background:#f0effc;color:#46408a}.badge.verify{background:var(--verify-soft);color:var(--verify)}.part{font-size:.9rem}.source-links{font-size:.83rem}.text-button{background:none;border:0;color:var(--accent);padding:0;text-decoration:underline;font-weight:600}.explain,.coverage,.sources{padding:54px 0 10px}.rule-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.rule-grid article{background:var(--panel);border-radius:10px;padding:17px}.rule-grid h3{margin-top:0;font-size:1rem}.coverage,.sources{max-width:900px}.sources{padding-bottom:70px}.evidence-date{color:var(--muted)}footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.9rem}.article{max-width:800px;padding:70px 0}.article h2{margin-top:2em}.article dt{font-weight:800;margin-top:1em}.article dd{margin-left:0;color:#3b474e}.empty{color:var(--muted);padding:10px}.scope-note strong{color:var(--ink)}
@media(max-width:860px){.checker{grid-template-columns:1fr}.results-step{position:static;max-height:none}.rule-grid{grid-template-columns:1fr 1fr}.summary-stats{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.wrap{width:min(100% - 24px,var(--max))}.hero{padding-top:44px}.rule-grid{grid-template-columns:1fr}.results-heading{display:block}.actions{justify-content:flex-start;margin-top:12px}.unlisted-row{grid-template-columns:1fr}.summary-stats{grid-template-columns:1fr 1fr}.header-inner a:last-child{font-size:.85rem}}
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.button-link{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;padding:11px 14px;border-radius:8px;font-weight:800}.button-link:hover{opacity:.9}.exact-answers ul{padding-left:1.2rem}.exact-answers li{margin:.55em 0}