:root{--bg:#060b0f;--panel:#0b141a;--green:#27efa0;--muted:#96aaa4;--line:#21483a;--warn:#ffbd3d}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 80% 0,#0b3929,#060b0f 35%);color:#effff8;font-family:Inter,Segoe UI,Arial,sans-serif}header{height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;border-bottom:1px solid var(--line);background:#080e13}header a{color:#fff;text-decoration:none;letter-spacing:.08em}header a:first-letter,header span{color:var(--green)}main{width:min(980px,calc(100% - 28px));margin:38px auto}.panel{padding:clamp(22px,5vw,56px);border:1px solid var(--line);background:rgba(8,16,21,.96);box-shadow:0 24px 80px #0008}.eyebrow{color:var(--green);letter-spacing:.22em;font-size:.72rem;font-weight:800}.panel h1{font-size:clamp(2.4rem,7vw,5.5rem);line-height:.95;margin:14px 0}.deck{font-size:1.16rem;color:#bdcbc7;max-width:740px}.notice{margin:25px 0;padding:15px;border-left:3px solid var(--warn);background:#211a09;color:#efd99a}label{display:block;margin:18px 0;color:#b9c8c3}input,select{width:100%;margin-top:7px;padding:14px;background:#050a0e;border:1px solid #2a5546;color:white;font:inherit}button{padding:13px 18px;border:1px solid var(--green);background:var(--green);color:#04100b;font-weight:800;cursor:pointer}.preview{color:#738781;font-size:.82rem}.exam-head{display:flex;justify-content:space-between;gap:20px}.exam-head p{color:var(--green)}#timer{font:700 1.4rem ui-monospace;color:var(--warn)}#diagram{display:block;max-width:100%;max-height:360px;margin:20px auto;border:1px solid var(--line)}#question{font-size:1.35rem;line-height:1.45}.option{display:block;width:100%;margin:10px 0;padding:15px;text-align:left;background:#0b171c;color:#dff6ed;border:1px solid #25483e}.option.selected{border-color:var(--green);background:#123027}.actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}.actions button{background:transparent;color:var(--green)}#submit{margin-left:auto;border-color:var(--warn);color:var(--warn)}#navigator{display:grid;grid-template-columns:repeat(auto-fill,minmax(38px,1fr));gap:6px;margin-top:24px}.navq{padding:9px 4px;background:#091116;color:#879991;border-color:#263e36}.navq.done{color:#04100b;background:var(--green)}.navq.flagged{outline:2px solid var(--warn)}#score{font-size:2rem;color:var(--green);margin:20px 0}#breakdown{display:grid;gap:7px;margin:22px 0}#breakdown div{display:flex;justify-content:space-between;padding:10px;border-bottom:1px solid var(--line)}@media(max-width:600px){header{padding:0 16px;font-size:.75rem}.panel{padding:22px}.exam-head{display:block}#submit{margin-left:0}}