:root{--bg:#f4f7fb;--card:#fff;--text:#162033;--muted:#64748b;--line:#dfe7f0;--accent:#0f766e;--accent2:#0b5f59;--green:#168a58;--red:#c33b32;--amber:#9a6700;--blue:#2463a6}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.5}.wrap{width:min(1180px,calc(100% - 32px));margin:auto}.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font-weight:800}.brand small{display:block;color:var(--muted);font-weight:500;font-size:12px}.brandmark{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--accent);color:#fff;font-size:22px}.back{color:var(--accent);text-decoration:none;font-weight:700}.home{padding:54px 0 42px}.welcome{max-width:760px;margin-bottom:30px}.eyebrow{display:inline-block;color:var(--accent);font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.welcome h1,.intro h1{font-size:clamp(30px,5vw,48px);line-height:1.05;margin:9px 0 14px}.welcome p,.intro p{color:var(--muted);font-size:17px}.module-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.module-card{display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;color:inherit;text-decoration:none;transition:.18s}.module-card:hover{transform:translateY(-2px);border-color:#b9c7d8}.module-card .icon{flex:0 0 56px;height:56px;display:grid;place-items:center;border-radius:15px;background:#e6f4f2;color:var(--accent);font-size:25px;font-weight:900}.module-card h2{margin:8px 0}.module-card p{color:var(--muted);margin:0 0 15px}.module-card strong{color:var(--accent)}.tag{font-size:12px;font-weight:800;color:var(--accent);text-transform:uppercase}.mini{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 18px}.mini span,.chip{font-size:12px;border:1px solid var(--line);border-radius:99px;padding:5px 9px;background:#f8fafc}.notice,.exam-rule,.history,.exam-info{margin-top:22px;padding:15px 17px;border:1px solid var(--line);background:#fff;border-radius:14px;color:var(--muted)}.footer{text-align:center;color:var(--muted);padding:28px 16px;font-size:13px}.app{padding:28px 0 44px}.dash{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:18px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}.stat span{display:block;color:var(--muted);font-size:12px}.stat strong{font-size:24px}.setup-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}.controls h2{margin-top:0}.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}.mode{min-height:48px;border:1px solid var(--line);background:#fff;border-radius:11px;font-weight:750;color:var(--text);cursor:pointer}.mode.active{border-color:var(--accent);background:#e9f6f4;color:var(--accent)}label{display:block;font-size:13px;font-weight:700;margin:12px 0}select{display:block;width:100%;margin-top:6px;min-height:45px;border:1px solid #cbd5e1;border-radius:10px;padding:8px 10px;background:#fff;color:var(--text);font-size:16px}.primary,.secondary{border:0;border-radius:11px;min-height:46px;padding:0 17px;font-size:15px;font-weight:800;cursor:pointer}.primary{background:var(--accent);color:#fff;width:100%;margin-top:10px}.primary:hover{background:var(--accent2)}.primary:disabled{opacity:.45;cursor:not-allowed}.primary.inline{width:auto;margin-top:0}.secondary{background:#fff;border:1px solid var(--line);color:var(--text)}.hidden{display:none!important}.quiz{max-width:900px;margin:0 auto}.progress-meta,.qmeta{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.progress{height:8px;background:#edf2f7;border-radius:99px;margin:10px 0 20px;overflow:hidden}.progress>div{height:100%;width:0;background:var(--accent);transition:width .2s}.qmeta>div{display:flex;gap:6px;flex-wrap:wrap}.chip.muted{color:var(--muted)}.chip.diff{font-weight:800}.chip.trap{background:#fff6dc;border-color:#f2d28a;color:#805d00;font-weight:800}.quiz h2{font-size:clamp(20px,3vw,28px);line-height:1.35}.options{display:grid;gap:10px;margin:22px 0}.option{display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);border-radius:13px;padding:13px 14px;cursor:pointer;background:#fff}.option:hover{border-color:#9fb3ca}.option input{margin-top:4px;accent-color:var(--accent)}.option .letter{font-weight:900;color:var(--accent);width:22px}.option.selected{border-color:var(--accent);background:#f0faf8}.option.correct{border-color:#83c9a8;background:#effaf4}.option.wrong{border-color:#e3a29d;background:#fff2f1}.actions{display:flex;gap:10px;flex-wrap:wrap}.hint,.feedback{padding:16px 18px;border-radius:13px;margin-top:14px}.hint{background:#fff8e6;border:1px solid #f2dda9}.feedback.good{background:#effaf4;border:1px solid #a8d8be;color:#17663f}.feedback.bad{background:#fff2f1;border:1px solid #efbbb6;color:#9a2922}.feedback.neutral{background:#eff6ff;border:1px solid #bdd5f3;color:#245987}.feedback h3{margin:0 0 6px}.score{display:flex;align-items:center;gap:20px}.circle{width:96px;height:96px;border-radius:50%;display:grid;place-items:center;background:#e9f6f4;color:var(--accent);font-weight:900;font-size:23px;flex:0 0 96px}.breakdown{display:grid;gap:10px;margin:22px 0}.breakrow{display:grid;grid-template-columns:1fr auto;gap:12px;border:1px solid var(--line);border-radius:12px;padding:12px 14px}.review{margin-top:22px;display:grid;gap:14px}.review-item{border:1px solid var(--line);border-radius:14px;padding:16px}.review-item.ok{border-left:5px solid var(--green)}.review-item.no{border-left:5px solid var(--red)}.review-item h4{margin:0 0 10px}.review-item p{margin:7px 0;color:#475569}.answerline{font-weight:800}.history{font-size:14px}.exam-rule strong{display:block;color:var(--text)}.exam-rule span{display:block;margin-top:4px}.exam-info{margin:0 0 15px;background:#f0f7ff}.exam-info p{margin:5px 0 0}.loading{opacity:.6;pointer-events:none}
@media(max-width:820px){.module-grid,.setup-grid{grid-template-columns:1fr}.dash{grid-template-columns:repeat(2,1fr)}.stat:last-child{grid-column:span 2}.mode-tabs{grid-template-columns:1fr}.panel{padding:20px}.home{padding-top:34px}}
@media(max-width:480px){.wrap{width:min(100% - 20px,1180px)}.nav{min-height:64px}.brandmark{width:36px;height:36px}.back{font-size:13px}.dash{gap:7px}.stat{padding:11px}.stat strong{font-size:20px}.module-card{padding:20px;gap:13px}.module-card .icon{width:46px;height:46px;flex-basis:46px}.score{align-items:flex-start}.actions>*{flex:1 1 auto}.option{padding:12px 10px}}