:root{--navy:#10243b;--blue:#2463eb;--cyan:#16a6b6;--ink:#182536;--muted:#66758a;--line:#e3eaf1;--bg:#f4f7fb;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 Inter,system-ui,-apple-system,Segoe UI,sans-serif}.topbar{height:70px;background:var(--navy);color:white;display:flex;align-items:center;justify-content:space-between;padding:0 max(calc((100% - 1180px)/2),24px);box-shadow:0 4px 16px #10243b18}.brand{display:flex;gap:11px;align-items:center;color:white;text-decoration:none;font-weight:800;letter-spacing:.5px}.brand small{display:block;font-size:9px;letter-spacing:2px;color:#a8c7e7}.brandmark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#25b5c5,#2864e9);font-size:21px}.topright{display:flex;align-items:center;gap:18px;font-size:13px}.container{max-width:1180px;margin:34px auto;padding:0 22px;min-height:calc(100vh - 140px)}.footer{text-align:center;color:#8a98a9;padding:25px;font-size:12px}.hero{background:linear-gradient(120deg,#10243b,#174d72 65%,#1a8190);color:white;border-radius:22px;padding:34px;display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:24px}.hero h1{font-size:30px;line-height:1.15;margin:8px 0}.hero p{color:#c6d9e8;max-width:620px}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#7bd9e1;font-weight:800}.btn{border:0;border-radius:10px;background:var(--blue);color:#fff;padding:11px 17px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;cursor:pointer}.btn:hover{filter:brightness(1.07)}.btn-light{background:white;color:var(--navy)}.btn-ghost{background:#ffffff18;color:inherit;border:1px solid #ffffff35}.btn-sm{padding:7px 11px;font-size:12px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:white;border:1px solid var(--line);border-radius:16px;padding:21px;box-shadow:0 4px 18px #1c3b5a08}.card h3{margin:0 0 8px}.muted{color:var(--muted)}.stat{font-size:30px;font-weight:800;color:var(--navy)}.section-title{margin:30px 0 14px;font-size:18px}.task-list{display:grid;gap:10px}.task-row{display:flex;align-items:center;gap:15px;background:white;border:1px solid var(--line);padding:15px;border-radius:13px}.code{background:#eaf1ff;color:#2857bd;border-radius:8px;padding:8px 10px;font-weight:800;font-size:12px}.task-row .meta{flex:1}.pill{border-radius:99px;padding:5px 10px;background:#edf7f8;color:#187c87;font-size:12px;font-weight:700}.form-card{max-width:480px;margin:7vh auto}.field{margin:14px 0}.field label{display:block;font-weight:700;margin-bottom:6px}.field input,.field textarea,.field select{width:100%;border:1px solid #d6e0ea;border-radius:10px;padding:12px 13px;font:inherit;background:#fff}.field textarea{min-height:230px;resize:vertical}.test-head{display:flex;justify-content:space-between;align-items:center;gap:15px;background:#fff;border:1px solid var(--line);padding:15px 20px;border-radius:14px;margin-bottom:16px}.timer{font-size:20px;font-weight:900;color:#d04a38;font-variant-numeric:tabular-nums}.test-layout{display:grid;grid-template-columns:280px 1fr;gap:17px}.task-nav{align-self:start;position:sticky;top:15px}.navitem{display:flex;justify-content:space-between;padding:10px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:13px}.navitem.active{background:#edf3ff;color:#2458c8;border-radius:8px;font-weight:800}.prompt{background:#f4f8fc;border:1px solid #e0eaf3;padding:17px;border-radius:12px;margin:14px 0;white-space:pre-wrap}.source{border-left:4px solid var(--cyan);background:#f3fbfb;padding:16px;border-radius:8px;white-space:pre-wrap}.wordmeter{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-top:7px}.progress{height:7px;background:#e8eef5;border-radius:20px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,#20a9b9,#2864e9)}table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line);font-size:13px}th{background:#f1f5fa;color:#526176}.score{font-size:38px;font-weight:900;color:var(--navy)}.rubric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.rubric-grid .field{margin:0}.notice{background:#fff8e8;border:1px solid #f1dfae;color:#76561a;padding:13px;border-radius:10px;font-size:13px}.success{background:#e9f8f1;color:#176b4a;padding:12px;border-radius:10px}.danger{background:#fff0ed;color:#9b3325;padding:12px;border-radius:10px}.actions{display:flex;gap:10px;justify-content:space-between;margin-top:18px}.nowrap{white-space:nowrap}@media(max-width:800px){.grid{grid-template-columns:1fr 1fr}.test-layout{grid-template-columns:1fr}.task-nav{position:static;display:flex;overflow:auto;gap:5px}.navitem{white-space:nowrap;border:1px solid var(--line);border-radius:8px}.rubric-grid{grid-template-columns:1fr 1fr}.hero{padding:25px;display:block}.container{margin:20px auto}}@media(max-width:520px){.grid{grid-template-columns:1fr}.topbar{padding:0 15px}.topright span{display:none}.container{padding:0 13px}.hero h1{font-size:25px}.rubric-grid{grid-template-columns:1fr 1fr}.test-head{align-items:flex-start;flex-direction:column}}