:root{--bg:#f5f7ff;--card:#fff;--text:#07111f;--muted:#667085;--primary:#0f62fe;--secondary:#14c8a8;--accent:#ffb703;--danger:#ef476f;--line:#d9e2f2;--shadow:0 20px 60px rgba(7,17,31,.12);--radius:24px}body.dark{--bg:#061225;--card:#101a31;--text:#f8fbff;--muted:#a8b6ca;--line:#263651}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;background:radial-gradient(circle at 10% 0%,rgba(15,98,254,.18),transparent 30%),radial-gradient(circle at 90% 10%,rgba(20,200,168,.16),transparent 25%),var(--bg);color:var(--text)}header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.82);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}body.dark header{background:rgba(6,18,37,.84)}.nav{max-width:1240px;margin:auto;padding:14px 20px;display:flex;gap:14px;align-items:center;justify-content:space-between}.logo{font-weight:900;font-size:20px}nav{display:flex;gap:12px;flex-wrap:wrap}nav a,.btn{text-decoration:none;border:0;border-radius:15px;padding:12px 16px;font-weight:800;background:var(--card);color:var(--text);box-shadow:0 8px 24px rgba(0,0,0,.06);cursor:pointer}.btn.primary,nav a.cta{background:linear-gradient(135deg,var(--primary),var(--secondary));color:white}.hero,.section{max-width:1240px;margin:auto;padding:70px 20px}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;min-height:78vh}h1{font-size:clamp(40px,7vw,82px);line-height:.95;margin:10px 0;letter-spacing:-.06em}h2{font-size:clamp(30px,4vw,54px);line-height:1;margin:0 0 12px;letter-spacing:-.04em}p{line-height:1.7}.lead,.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:22px}.stat strong{font-size:30px;display:block;color:var(--primary)}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:16px;padding:14px;background:var(--card);color:var(--text);font:inherit}.row{display:flex;gap:10px;flex-wrap:wrap}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.chip{border:1px solid var(--line);border-radius:999px;background:var(--card);padding:9px 12px;font-weight:800;cursor:pointer;color:var(--text)}.answer{background:rgba(15,98,254,.08);border:1px solid var(--line);border-radius:18px;padding:15px;margin-top:12px;color:var(--muted);max-height:340px;overflow:auto}.modulebar{display:flex;gap:8px;overflow:auto;padding-bottom:10px;margin:18px 0}.modulebar button{white-space:nowrap}.modulebar .active,.cat.active{background:var(--primary);color:white}.qa-tools{display:grid;grid-template-columns:1fr 220px 150px;gap:12px;margin:18px 0}.qa-list{display:grid;gap:12px}.qa-item{background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden}.qa-q{width:100%;text-align:left;background:transparent;color:var(--text);border:0;padding:16px;font-weight:900;cursor:pointer}.qa-a{display:none;padding:0 16px 16px;color:var(--muted)}.qa-item.open .qa-a{display:block}.quizbox{max-width:900px;margin:auto}.option{display:block;width:100%;text-align:left;margin:10px 0;border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:16px;padding:15px;font-weight:800;cursor:pointer}.option.good{outline:3px solid rgba(20,200,168,.55)}.option.bad{outline:3px solid rgba(239,71,111,.55)}.notice{font-size:13px;color:var(--muted)}footer{padding:30px 20px;text-align:center;color:var(--muted)}@media(max-width:900px){.hero,.grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.qa-tools{grid-template-columns:1fr}nav{display:none}}