:root{
  --bg:#f3f6fa;--surface:#fff;--ink:#10213a;--muted:#4a5b72;--line:#d3dce7;--accent:#0a5cad;--accent-ink:#fff;--soft:#e8eff7;
  --ok:#0b6b43;--ok-bg:#e1f4ea;--no:#a8231b;--no-bg:#fde8e6;--warn:#7a4e00;--warn-bg:#fff1d0;--unk:#41536b;--unk-bg:#e6ebf1;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --radius:8px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0c1522;--surface:#142235;--ink:#e6edf6;--muted:#a8b7cb;--line:#2a3d55;--accent:#6db3ff;--accent-ink:#06182d;--soft:#1a2c44;
  --ok:#6fddab;--ok-bg:#12382a;--no:#ff9d95;--no-bg:#43201f;--warn:#ffd27a;--warn-bg:#3d2f0e;--unk:#b6c4d8;--unk-bg:#223349;
}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.6 var(--sans);padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
a{color:var(--accent);text-underline-offset:.15em}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:3px}
code,pre{font-family:var(--mono);font-size:.9em}
code{background:var(--soft);padding:.1em .35em;border-radius:4px;overflow-wrap:anywhere}
pre{background:var(--soft);padding:1rem;border-radius:var(--radius);overflow-x:auto;border:1px solid var(--line)}
pre code{background:none;padding:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:.6rem 1rem;z-index:10}
.skip:focus{left:0}
.wrap{width:min(1080px,100% - 2rem);margin-inline:auto}
.narrow{width:min(760px,100% - 2rem)}
h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.1;letter-spacing:-.025em;margin:.2em 0 .4em}
h2{font-size:clamp(1.4rem,3vw,1.85rem);line-height:1.2;letter-spacing:-.015em;margin:2.2em 0 .6em}
h3,.h3{font-size:1.15rem;line-height:1.3;margin:1.6em 0 .4em}
p{margin:.8em 0}

.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:700;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.mark{display:grid;place-items:center;width:1.9rem;height:1.9rem;border-radius:7px;background:var(--accent);color:var(--accent-ink);font-weight:800}
nav ul{display:flex;gap:.25rem;list-style:none;margin:0;padding:0;flex-wrap:wrap}
nav a{display:block;padding:.45rem .75rem;border-radius:6px;color:var(--ink);text-decoration:none}
nav a:hover{background:var(--soft)}
nav a[aria-current=page]{background:var(--soft);font-weight:600}

.hero{padding:clamp(2rem,6vw,4rem) 0 1.5rem}
.brand-line{font-weight:700;color:var(--accent);margin:0}
.lead{font-size:1.2rem;color:var(--muted);max-width:42rem}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:2.5rem;align-items:center}
.tool-hero{text-align:left}

.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);font:600 1rem var(--sans);border:2px solid var(--accent);border-radius:var(--radius);padding:.75rem 1.3rem;cursor:pointer;text-decoration:none;min-height:46px}
.btn:hover{filter:brightness(1.08)}
.btn[disabled]{opacity:.6;cursor:wait}
.btn-ghost{background:transparent;color:var(--accent)}
.btn-small{padding:.45rem .9rem;min-height:38px;font-size:.95rem}

.check-form{margin-top:1.6rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem}
.check-form label{font-weight:600;display:block;margin-bottom:.4rem}
.field{display:flex;gap:.6rem;flex-wrap:wrap}
.field input{flex:1 1 260px;font:1rem var(--mono);padding:.75rem .85rem;border:2px solid var(--line);border-radius:var(--radius);background:var(--bg);color:var(--ink);min-height:46px}
.field input:focus{border-color:var(--accent)}
.field input[aria-invalid=true]{border-color:var(--no)}
.help{color:var(--muted);font-size:.9rem;margin:.6rem 0 0}
.form-error{color:var(--no);background:var(--no-bg);border-left:4px solid var(--no);padding:.6rem .8rem;border-radius:4px;margin:.8rem 0 0;font-weight:500}

.progress{margin-top:1.4rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.2rem}
.progress .h3{margin-top:0}
#steps{list-style:none;margin:0;padding:0}
#steps li{display:flex;gap:.6rem;align-items:baseline;padding:.3rem 0;color:var(--muted)}
#steps li[data-state=active]{color:var(--ink);font-weight:600}
#steps li[data-state=done]{color:var(--ink)}
#steps .ico{width:1.3rem;text-align:center;flex:none;font-family:var(--mono)}

.limits-callout,.callout{margin:1.2rem auto;border:2px solid var(--ink);border-radius:var(--radius);padding:.9rem 1.1rem;background:var(--surface)}
.limits-callout h2{margin:0 0 .3rem}
.limits-callout p{margin:.2rem 0}

.results{padding:1.5rem 0;scroll-margin-top:1rem}
.report-head{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.4rem}
.report-head h2{margin:0 0 .4rem}
.report-meta{color:var(--muted);margin:.2rem 0;overflow-wrap:anywhere}
.overall{display:flex;gap:.8rem;align-items:center;flex-wrap:wrap;margin:.8rem 0 .2rem}
.overall .badge{font-size:1.1rem;padding:.4rem .9rem}
.cache-note{font-size:.9rem;color:var(--muted)}
.actions{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}

.badge{display:inline-flex;gap:.35rem;align-items:center;font-weight:600;font-size:.9rem;border-radius:999px;padding:.15rem .65rem;border:1.5px solid currentColor;white-space:nowrap}
.badge-accessible{color:var(--ok);background:var(--ok-bg)}
.badge-blocked{color:var(--no);background:var(--no-bg)}
.badge-warning{color:var(--warn);background:var(--warn-bg)}
.badge-unknown{color:var(--unk);background:var(--unk-bg)}

.table-scroll{overflow-x:auto;margin:1rem 0;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
table.data{border-collapse:collapse;width:100%;min-width:560px}
table.data th,table.data td{padding:.6rem .8rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.data thead th{background:var(--soft);font-size:.95rem}
table.data tbody tr:last-child>*{border-bottom:0}
table.data tbody th{font-weight:600}

.detail{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin:.6rem 0}
.detail>summary,.faq>summary{cursor:pointer;padding:.8rem 1rem;font-weight:600;display:flex;gap:.7rem;align-items:center;flex-wrap:wrap;list-style-position:inside}
.detail-body{padding:0 1rem 1rem;border-top:1px solid var(--line)}
.detail-body dl{display:grid;grid-template-columns:max-content 1fr;gap:.35rem 1rem;margin:.8rem 0}
.detail-body dt{font-weight:600;color:var(--muted)}
.detail-body dd{margin:0;overflow-wrap:anywhere}
.rule-lines{white-space:pre-wrap;margin:.3rem 0}
.note{background:var(--soft);border-left:4px solid var(--accent);padding:.5rem .8rem;border-radius:4px}
.tech{margin-top:1.2rem}

.prose{padding-bottom:3rem}
.prose.page{max-width:760px}
.prose section{margin-bottom:1rem}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li{margin:.4em 0}
.plain-steps li{margin:.8em 0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:.2rem 1.1rem 1rem}
.limitations{border:2px solid var(--ink);border-radius:var(--radius);padding:.2rem 1.4rem 1.2rem;background:var(--surface);margin-top:2.5rem}
.limitations h2{margin-top:1rem}
.faq{border-bottom:1px solid var(--line)}
.faq>summary{padding-inline:0}
.faq p{margin:0 0 1rem}
.cta-row{margin-top:2rem}
.contact-list{list-style:none;padding:0}
.contact-list li{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;margin:.9rem 0}
.contact-list span{flex:1 1 260px;color:var(--muted)}

.trace{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1rem}
.trace-head{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:.8rem}
.gate{display:grid;grid-template-columns:5.5rem 1fr auto;gap:.6rem;align-items:center;padding:.8rem .8rem;border-left:6px solid;border-radius:4px;background:var(--bg);margin:.5rem 0}
.gate-ok{border-color:var(--ok)}
.gate-no{border-color:var(--no)}
.gate-name{font-weight:600}
.trace figcaption{color:var(--muted);font-size:.95rem;margin-top:.8rem}

.ad-slot{margin:2rem auto;text-align:center;min-height:90px}
.ad-label{font-size:.75rem;color:var(--muted);margin:0 0 .2rem}

.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:1.5rem 0 2rem;margin-top:2rem;color:var(--muted);font-size:.95rem}
.site-footer ul{margin:.6rem 0}
.copy{font-size:.85rem}

@media (max-width:760px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .gate{grid-template-columns:1fr auto}.gate-say{grid-column:1/-1;order:3}
  .detail-body dl{grid-template-columns:1fr}.detail-body dt{margin-top:.4rem}
  .field .btn{width:100%}
}
@media print{.site-header,.site-footer,.check-form,.actions,.ad-slot{display:none}}