:root{--navy:#0f3d75;--blue:#1769aa;--sky:#eaf4ff;--ink:#172033;--muted:#667085;--line:#d9e2ec;--paper:#fff;--bg:#f5f8fc;--good:#138a5b;--warn:#b7791f;--shadow:0 16px 40px rgba(15,61,117,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}button,input,select{font:inherit}a{color:inherit}.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;padding:14px clamp(16px,4vw,56px);background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:max-content}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;font-weight:800}.brand strong,.brand small{display:block}.brand small{color:var(--muted);font-size:.76rem}.main-nav{display:flex;gap:6px;margin-left:auto}.main-nav a{padding:9px 11px;border-radius:9px;text-decoration:none;color:#344054;font-weight:650}.main-nav a:hover,.main-nav a.active{background:var(--sky);color:var(--navy)}.install-btn,.menu-btn{border:0;border-radius:9px;padding:10px 14px;cursor:pointer}.install-btn{background:var(--navy);color:#fff}.menu-btn{display:none;background:var(--sky);font-size:1.35rem}.page{display:none;max-width:1240px;margin:auto;padding:44px clamp(16px,4vw,44px) 72px}.page.active{display:block}.hero{display:grid;grid-template-columns:1.4fr .8fr;gap:38px;align-items:center;min-height:430px;padding:36px;border-radius:28px;background:linear-gradient(130deg,#fff 5%,#edf6ff 100%);border:1px solid #d7e9fa;box-shadow:var(--shadow)}.eyebrow{display:inline-block;font-size:.76rem;letter-spacing:.12em;font-weight:800;color:var(--blue);margin-bottom:8px}.hero h1,.page-title h1{margin:.1em 0 .25em;line-height:1.06}.hero 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a,.link-btn{color:var(--blue);font-weight:800;text-decoration:none}.link-btn{border:0;background:none;padding:0;cursor:pointer}.section-head,.page-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:42px 0 18px}.section-head h2{margin:3px 0}.paper-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.paper-card{display:flex;flex-direction:column;min-height:255px}.paper-card .meta,.question-meta{display:flex;gap:7px;flex-wrap:wrap}.tag{padding:5px 8px;border-radius:7px;background:#f0f5fa;color:#4d647a;font-size:.78rem;font-weight:700}.paper-card h3{margin:14px 0 5px}.paper-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}.paper-actions button{border:1px solid #cddbea;background:#fff;color:var(--navy);border-radius:9px;padding:8px 10px;cursor:pointer;font-weight:700}.toolbar{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin-bottom:18px}.question-list{display:grid;gap:12px}.question-card{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}.question-card h3{margin:8px 0}.question-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.question-actions button{border:1px solid #cddbea;background:#fff;border-radius:8px;padding:8px 10px;cursor:pointer}.practice-layout,.builder-layout{display:grid;grid-template-columns:280px 1fr;gap:20px}.practice-side,.builder-form,.practice-card,.generated-paper{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.practice-side{display:flex;flex-direction:column;gap:9px;height:max-content}.score-box{margin-top:10px;padding:16px;border-radius:12px;background:var(--sky)}.score-box span,.score-box strong{display:block}.score-box strong{font-size:1.6rem;color:var(--navy)}.practice-card{min-height:380px}.practice-card .answer{display:block;width:100%;text-align:left;margin:9px 0;padding:13px;border:1px solid #ced9e4;background:#fff;border-radius:10px;cursor:pointer}.practice-card 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#cbd9e7;border-radius:10px;background:#f8fbfe;color:var(--navy);font-weight:750;cursor:pointer}.mock-screen{padding:22px;border-radius:14px;background:#f8fbfe;border:1px solid #d6e5f3}.mock-top{display:flex;justify-content:space-between;font-weight:800;color:var(--navy)}footer{display:flex;justify-content:space-between;gap:24px;padding:28px clamp(16px,4vw,56px);background:#102b4c;color:#dbe7f4}footer strong,footer span{display:block}footer span,footer p{color:#b9c8d8}footer p{max-width:720px;margin:0}@media(max-width:900px){.main-nav{position:absolute;left:16px;right:16px;top:72px;display:none;flex-direction:column;background:#fff;padding:12px;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.main-nav.open{display:flex}.menu-btn{display:block;margin-left:auto}.install-btn{display:none!important}.hero,.practice-layout,.builder-layout,.dashboard-lower{grid-template-columns:1fr}.feature-grid,.paper-grid{grid-template-columns:1fr 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