:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#17243b;background:#f3f5fa;font-synthesis:none;line-height:1.6;--blue:#2257d6;--muted:#596981;--line:#dce3ef;--navy:#152442}*{box-sizing:border-box}body{margin:0}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:var(--blue)}button:focus-visible,a:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #df8d00;outline-offset:4px}.skip{position:absolute;left:12px;top:-100px;background:white;padding:12px;z-index:10}.skip:focus{top:8px}header{background:var(--navy);color:white}.header-inner{max-width:1160px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 30px}.brand{display:flex;align-items:center;gap:13px;color:white;text-decoration:none;font-size:23px;font-weight:750;line-height:1.2;letter-spacing:-.6px}.brand small{display:block;color:#b5c6e7;font-size:10px;letter-spacing:1.8px;margin-top:7px}.mark{display:grid;place-items:center;width:48px;height:48px;background:var(--blue);border-radius:14px;font-size:19px;letter-spacing:-1px}nav{display:flex;gap:9px}.nav-button{background:none;color:#dfe8fb;border:1px solid #40516d;border-radius:9px;padding:10px 15px;font-size:14px;min-height:44px}.nav-button:hover{background:#273b5c}main{max-width:1100px;min-height:65vh;margin:0 auto;padding:44px 30px 64px}h1{font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.2;letter-spacing:-1px;margin:9px 0 14px}h2{font-size:1.4rem;line-height:1.35;margin:0 0 10px;letter-spacing:-.4px}p{margin:0 0 16px}.eyebrow{text-transform:uppercase;font-size:12px;font-weight:750;letter-spacing:1.7px;color:var(--blue)}.muted{color:var(--muted)}.intro{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}.stamp{font-size:13px;white-space:nowrap;color:var(--muted);padding-bottom:18px}.stats{display:flex;gap:32px;margin:26px 0 32px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.stat strong{display:block;font-size:29px;line-height:1.1;letter-spacing:-1px}.stat span{font-size:13px;color:var(--muted)}.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.module-card{background:white;border:1px solid var(--line);border-radius:17px;padding:26px;display:flex;flex-direction:column;box-shadow:0 5px 18px #18335706}.module-card .tag{align-self:start;font-size:12px;font-weight:750;letter-spacing:.8px;padding:5px 9px;background:#e9effe;color:#1744ae;border-radius:6px;margin-bottom:19px}.module-card:nth-child(even) .tag{background:#dcf3e9;color:#18543b}.module-card h2{min-height:60px}.module-card .meta{font-size:14px;color:var(--muted);margin-bottom:22px}.progress-track{height:7px;background:#e9edf5;border-radius:9px;overflow:hidden;margin:8px 0 10px}.progress-track span{display:block;height:100%;background:var(--blue);border-radius:9px}.progress-caption{font-size:13px;color:var(--muted);margin-bottom:22px}.primary,.secondary{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:12px 20px;border-radius:9px;border:1px solid var(--line);font-weight:650;text-decoration:none}.primary{background:var(--blue);color:white;border-color:var(--blue)}.primary:hover{background:#1947b6}.secondary{background:white;color:#203452}.secondary:hover{background:#f1f5ff}.secondary:disabled{opacity:.5}.module-card .primary{margin-top:auto;width:100%}.back{border:0;padding:0;background:none;color:var(--muted);min-height:44px;margin-bottom:18px}.panel{background:white;border:1px solid var(--line);border-radius:16px;padding:28px;margin-top:26px}.controls{display:flex;align-items:end;gap:18px;flex-wrap:wrap}.field{display:flex;flex-direction:column;gap:8px;min-width:200px;flex:1}.field label{font-size:14px;font-weight:650}select{border:1px solid #bac7dd;border-radius:9px;background:white;color:#17243b;padding:12px;min-height:48px;width:100%}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.hint{font-size:14px;color:var(--muted);margin-top:22px}.quiz-shell{max-width:790px;margin:auto}.quiz-top{display:flex;justify-content:space-between;gap:15px;align-items:center;font-size:14px;color:var(--muted)}.quiz-top button{margin:0}.quiz-question{font-size:clamp(1.35rem,3vw,1.8rem);line-height:1.45;letter-spacing:-.4px;margin:30px 0 24px}.answers{display:grid;gap:12px}.answer{text-align:left;width:100%;display:flex;align-items:center;gap:15px;padding:17px 20px;border:1.5px solid var(--line);border-radius:11px;background:white;color:#17243b;line-height:1.5;min-height:66px}.answer:not(:disabled):hover{border-color:var(--blue);background:#edf3ff}.answer .letter{flex-shrink:0;width:32px;height:32px;border-radius:7px;background:#f1f4f9;display:grid;place-items:center;font-size:13px;font-weight:750}.answer.correct{border-color:#27865a;background:#e9f7f0}.answer.wrong{border-color:#c34935;background:#fff0ec}.answer .answer-status{margin-left:auto;font-size:13px;font-weight:700;flex-shrink:0}.feedback{border-left:4px solid #27865a;background:#e9f7f0;padding:22px;margin-top:24px;border-radius:0 11px 11px 0}.feedback.wrong{border-color:#c34935;background:#fff2ee}.feedback h2{font-size:1.15rem;margin-bottom:9px}.feedback p{margin-bottom:12px}.source{font-size:13px;color:#526078;border-top:1px solid #00000015;padding-top:12px;margin-top:16px;overflow-wrap:anywhere}.next-row{display:flex;justify-content:flex-end;margin-top:20px}.result-score{font-size:76px;letter-spacing:-4px;color:var(--blue);font-weight:780;line-height:1.15;margin:20px 0}.empty{padding:32px;background:white;border:1px solid var(--line);border-radius:14px}.loading{padding:60px;text-align:center;color:var(--muted)}footer{max-width:1100px;margin:auto;border-top:1px solid var(--line);padding:22px 30px 30px;display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:12px}#notice:not(:empty){position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:var(--navy);color:white;border-radius:10px;padding:13px 20px;max-width:min(92%,560px);font-size:14px;box-shadow:0 4px 30px #0003;z-index:3}.storage-warning{padding:12px 16px;background:#fff0d1;color:#714e04;border-radius:8px;font-size:14px;margin-bottom:20px}@media(max-width:650px){.header-inner{padding:17px 18px;gap:10px}.brand{font-size:20px}.brand small{font-size:8px;letter-spacing:1px}.mark{width:39px;height:39px;font-size:16px}nav{gap:5px}.nav-button{font-size:12px;padding:8px 10px}#home-button{display:none}main{padding:30px 18px 40px}.intro{display:block;margin-bottom:18px}.stamp{padding:0}.stats{gap:24px;margin:24px 0}.stat strong{font-size:25px}.module-grid{grid-template-columns:1fr;gap:17px}.module-card{padding:23px}.module-card h2{min-height:0}.panel{padding:21px}.actions>*{flex:1 1 100%}.answer{padding:14px 12px;gap:10px;font-size:16px}.answer .answer-status{font-size:11px}.feedback{padding:19px}footer{flex-direction:column;gap:5px;padding:20px 18px}.quiz-top{align-items:flex-start}.quiz-top span{max-width:72%}.result-score{font-size:64px}}
/* Page content receives focus after navigation; only interactive controls need a ring. */
main[tabindex]:focus{outline:none}
.deadline-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:28px}.deadline-card{background:#eaf0ff;border:1px solid #cbd9f8;border-radius:14px;padding:24px}.deadline-card h2{margin:10px 0 18px}.deadline-card .source{display:block}.info-module h2{margin-top:8px}.assessment-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.assessment-list article{border:1px solid var(--line);padding:20px;border-radius:10px}h3{font-size:17px;line-height:1.4;margin:16px 0}dl{margin:0}dl div{margin:12px 0}dt{font-size:13px;color:var(--muted)}dd{margin:0;font-size:16px}li{margin-bottom:10px}details{border-top:1px solid var(--line);padding:18px 0 0;margin-top:22px}summary{cursor:pointer;font-weight:650;min-height:36px}.teaching-list{padding-left:0;list-style:none}.teaching-list li{padding:12px 0;border-bottom:1px solid var(--line)}.teaching-list span{display:block;color:var(--muted);font-size:14px}.teaching-list strong{font-weight:500}@media(max-width:650px){.header-inner{flex-wrap:wrap}nav{width:100%}#home-button{display:block}.nav-button{flex:1}h3{font-size:17px}.deadline-grid,.assessment-list{grid-template-columns:1fr}.deadline-card{padding:20px}}