:root{--primary:#174b78;--secondary:#4d7c3f;--background:#f5f7fa;--surface:#fff;--text:#1f2937;--muted:#6b7280;--danger:#b42318;--border:#d0d5dd}*{box-sizing:border-box}body{margin:0;background:var(--background);color:var(--text);font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}.site-head{display:flex;align-items:center;gap:1rem;padding:1rem max(calc((100% - 1100px)/2),1.25rem);background:#fff;border-bottom:1px solid var(--border)}.site-head small{color:var(--muted)}.brand-mark{display:grid;place-items:center;min-width:54px;height:54px;background:var(--primary);color:white;font-weight:800;border-radius:12px;text-decoration:none}.wrap{max-width:1100px;margin:2rem auto;padding:0 1.25rem}.hero{padding:2rem 0}.eyebrow,.tag{color:var(--secondary);font-weight:800;letter-spacing:.08em}.hero h1{font-size:clamp(2rem,5vw,3rem);line-height:1.1;color:var(--primary)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}.card,.panel{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.5rem;box-shadow:0 6px 20px #122b4410}.card h2{color:var(--primary)}.card dl{display:grid;grid-template-columns:1fr 1.2fr;font-size:.92rem}.card dt{color:var(--muted)}.button{display:inline-block;border:0;border-radius:9px;padding:.8rem 1.1rem;background:var(--primary);color:#fff;text-decoration:none;font-weight:700;cursor:pointer}.button:hover{background:#0f3557}.center{text-align:center;margin:2rem}.site-foot{text-align:center;padding:2rem;color:var(--muted)}.notice{padding:1rem;margin:1rem 0;border-radius:8px;background:#e6f4ea}.notice.error{background:#fee4e2;color:var(--danger)}table{width:100%;border-collapse:collapse;background:white}th,td{text-align:left;padding:.7rem;border-bottom:1px solid var(--border)}@media(max-width:800px){.cards{grid-template-columns:1fr}.wrap{margin:1rem auto}.site-head{padding:1rem}}
.alevel-group{min-width:0;margin:1.25rem 0;padding:1rem;border:1px solid var(--border);border-radius:12px;background:#fbfcfe}
.alevel-group legend{padding:0 .45rem;color:var(--primary);font-size:1.15rem;font-weight:750}
.alevel-group .subjects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem}
.alevel-group .subject{display:grid;grid-template-columns:1.5rem minmax(0,1fr);align-items:start;gap:.7rem;min-width:0;padding:.8rem;border:1px solid var(--border);border-radius:9px;background:#fff}
.alevel-group .subject input{width:1.25rem;height:1.25rem;margin:.15rem 0;accent-color:var(--primary)}
.alevel-group .subject label{display:grid;gap:.15rem;min-width:0;cursor:pointer;overflow-wrap:anywhere}
.alevel-group .subject label span{font-weight:650;font-variant-numeric:tabular-nums}
.alevel-group .subject small,.tier-help{color:var(--muted);font-size:.84rem;overflow-wrap:anywhere}
.alevel-group .subject input:disabled{opacity:.55}
.alevel-group .subject:has(input:disabled) label{color:var(--muted)}
.alevel-group .tier-help{grid-column:2}
@media(max-width:600px){.alevel-group{padding:.8rem}.alevel-group .subjects{grid-template-columns:minmax(0,1fr)}.alevel-group .subject{padding:.85rem}}
@media(max-width:650px){table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}th,td{padding:.5rem}}