:root{color-scheme:dark;--bg:#08101f;--panel:#111b31;--line:#293b59;--text:#f1f4fb;--muted:#a4adc3;--green:#69e5b3;--gold:#f1ce83;--red:#f3999b}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 50% -20%,#1a2a49,var(--bg) 55%);color:var(--text);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}.page{max-width:1120px;margin:auto;padding:clamp(20px,5vw,56px)}a{color:var(--green)}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:12px;top:12px;background:var(--panel);padding:10px;z-index:1}.hero{padding:24px 0 36px}.eyebrow{color:var(--green);font-size:.75rem;font-weight:800;letter-spacing:.14em}.hero h1{max-width:850px;margin:.2em 0;font:500 clamp(2.4rem,7vw,5rem)/1.04 Georgia,serif}.lead{max-width:780px;color:#d5dced;font-size:1.15rem}.boundary{border:1px solid #695a36;border-radius:14px;background:#1e1a14;padding:16px 20px;color:#f5e4bd}.cases{display:grid;gap:22px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px}.section-heading h2{font:500 clamp(1.6rem,4vw,2.5rem) Georgia,serif;margin:.2em 0}.section-heading>p{max-width:420px;color:var(--muted)}.case{background:linear-gradient(145deg,#131e34,#0d1729);border:1px solid var(--line);border-radius:20px;padding:clamp(18px,4vw,30px);box-shadow:0 16px 40px #0003}.case-head{display:flex;gap:16px;align-items:flex-start}.case-number{flex:none;border:1px solid var(--green);color:var(--green);width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:800}.case h3{font:500 clamp(1.25rem,3vw,1.8rem)/1.2 Georgia,serif;margin:.3em 0}.case-head .eyebrow{margin:.2em 0}.record{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:22px 0}.record div{border:1px solid #263957;border-radius:11px;padding:11px 14px;background:#0b1426}.record dt{color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.07em}.record dd{margin:3px 0 0;font-weight:650}fieldset{border:0;padding:0;margin:0}legend{font-weight:750;margin-bottom:10px}label{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;margin:8px 0;border:1px solid #2b3d5b;border-radius:11px;cursor:pointer}label:hover{border-color:#7189ae}label:has(input:checked){border-color:var(--green);background:#132a2c}input{margin-top:5px;accent-color:var(--green)}button{margin-top:12px;border:0;border-radius:10px;padding:12px 18px;background:var(--green);color:#07151a;font-weight:800;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.feedback{min-height:1.6em;color:#d5dced}.feedback[data-result=correct]{color:var(--green)}.feedback[data-result=incorrect]{color:var(--gold)}.sources{margin-top:40px;border-top:1px solid var(--line);padding-top:20px;color:var(--muted)}.sources li{margin:5px 0}@media(max-width:650px){.section-heading{display:block}.case{padding:18px}.record{grid-template-columns:1fr}}