:root { color-scheme:light; font-family:system-ui,-apple-system,Segoe UI,sans-serif; --text:#172c38; --muted:#354e59; --surface:#fff; --border:#b6c9cb; --accent:#075a59; }
* { box-sizing:border-box; }
body { margin:0; background:#f5f8f8; color:var(--text); line-height:1.6; }
a { color:#075b62; } a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible { outline:3px solid #b24b08; outline-offset:3px; }
.skip {position:absolute;left:-9999px;top:0;padding:10px;background:#fff;} .skip:focus {left:12px;z-index:10;}
.bar {background:#10333d;color:#fff;padding:15px max(20px,calc((100vw - 1024px)/2));display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.bar a {color:#fff;text-decoration:none;font-weight:800;margin-right:auto;}.brand span{color:#a7e8da;}
.bar select {max-width:155px;}
main{max-width:1024px;margin:0 auto;padding:25px 20px 60px;}
.hero {padding:16px 0 10px;} h1 {font-size:clamp(1.8rem,3.7vw,3rem);line-height:1.15;max-width:780px;} h2{line-height:1.3;}
.eyebrow {font-size:.84rem;letter-spacing:.09em;font-weight:750;color:var(--accent)}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;margin:24px 0;}
.alert{padding:14px 16px;border-left:5px solid #aa680e;background:#fff4df;border-radius:4px;}
.fields{display:grid;grid-template-columns:2fr 1fr;gap:20px;margin:20px 0;} label {display:block;font-weight:650;margin-bottom:6px;}
input,select,button {font:inherit;min-height:44px;border-radius:7px;padding:8px 10px;} input,select{width:100%;border:1px solid #697e82;background:#fff;color:var(--text);}button {background:var(--accent);color:#fff;border:2px solid var(--accent);font-weight:750;cursor:pointer;}button:hover{background:#064948;}
.table-scroller {overflow-x:auto;} table {border-collapse:collapse;width:100%;min-width:350px;} th,td {text-align:left;padding:9px;border-bottom:1px solid var(--border)}; th{font-weight:700}
tfoot{font-weight:750;} .tiers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}.tiers article{border:1px solid var(--border);border-radius:8px;padding:12px 16px;}
.small,.footer {font-size:.9rem;color:var(--muted);} li {padding:6px 0;} li .source-status {color:var(--muted);font-size:.85rem;}
@media(max-width:600px){.fields,.tiers{grid-template-columns:1fr}.panel{padding:16px}}
@media(prefers-reduced-motion:reduce){* {scroll-behavior:auto!important;transition:none!important}}

.study-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.study-fields input{max-width:100%}.table-scroller th{white-space:nowrap}.table-scroller td{font-variant-numeric:tabular-nums}#study-result{margin-top:18px}#study-export{margin-top:12px}@media(max-width:600px){.study-fields{grid-template-columns:1fr}}

.guest-fields{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.guest-align{display:flex;align-items:end}.guest-align button{width:100%}.guest-actions{display:flex;flex-direction:column;gap:8px;justify-content:end}.guest-actions button{width:100%}button:disabled{opacity:.55;cursor:not-allowed}#guest-status{min-height:1.4em;font-weight:650}#guest-file{padding:8px;min-width:0}@media(max-width:600px){.guest-fields{grid-template-columns:1fr}}