:root{
--bg:#07111f;--panel:rgba(13,25,43,.76);--line:rgba(255,255,255,.10);
--text:#edf6ff;--muted:#a9bbcf;--accent:#76e6bd;--accent2:#7aa9ff;--danger:#ff7184;
--shadow:0 18px 50px rgba(0,0,0,.35)
}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 15% 15%,#13294a 0,#07111f 42%,#050b14 100%);color:var(--text);font:15px/1.55 Inter,system-ui,-apple-system,Segoe UI,sans-serif;min-height:100vh}
a{color:#b7d5ff;text-decoration:none}a:hover{text-decoration:underline}.topbar{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:auto;padding:22px 20px;position:relative;z-index:2}.brand{display:flex;gap:12px;align-items:center;color:#fff}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#06111e;font-weight:900;font-size:20px;box-shadow:0 8px 30px rgba(118,230,189,.2)}.brand small{display:block;color:var(--muted);font-size:11px}.topbar nav{display:flex;gap:16px;align-items:center}.container{max-width:1200px;margin:auto;padding:10px 20px 50px;position:relative;z-index:1}.bg-orb{position:fixed;filter:blur(60px);opacity:.28;pointer-events:none;border-radius:50%}.orb-a{width:260px;height:260px;background:#355fd8;right:6%;top:14%}.orb-b{width:220px;height:220px;background:#21b88c;left:2%;bottom:10%}.hero{display:grid;grid-template-columns:1.4fr .8fr;gap:30px;align-items:center;padding:70px 0}.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--accent);font-weight:800}.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.02;margin:14px 0}.hero p{font-size:18px;max-width:720px;color:var(--muted)}.hero-actions{display:flex;gap:12px;margin:26px 0}.hero-note{color:var(--muted);font-size:12px}.glass,.course-card,.question-card,.auth-card,.metric,.admin-panel,.test-question,.test-nav,.test-head,.result-card{background:var(--panel);border:1px solid var(--line);backdrop-filter:blur(18px);box-shadow:var(--shadow);border-radius:22px}.hero-card{padding:28px}.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.stat-grid div{padding:16px;border-radius:16px;background:rgba(255,255,255,.035)}.stat-grid strong{display:block;font-size:28px}.stat-grid span{color:var(--muted);font-size:12px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:12px 18px;border:0;border-radius:13px;background:linear-gradient(135deg,var(--accent),#86bfff);color:#07111f;font-weight:800;cursor:pointer}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.btn.full{width:100%}.btn-sm{padding:9px 13px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-grid article{padding:22px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.025)}.icon{font-size:25px}.muted{color:var(--muted)}.center{text-align:center}.auth-card{max-width:460px;margin:55px auto;padding:28px}.auth-card h2{margin-top:0}label{display:block;color:#dfeaf5;font-weight:650;margin:14px 0}input,select{width:100%;margin-top:7px;background:#091726;color:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 13px;outline:none}input:focus{border-color:var(--accent2)}.alert{padding:13px 16px;border-radius:13px;margin:12px 0}.alert.success{background:rgba(73,203,153,.12);border:1px solid rgba(73,203,153,.28)}.alert.danger{background:rgba(255,113,132,.12);border:1px solid rgba(255,113,132,.28)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin:30px 0}.section-head h1{margin:8px 0 0}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.metric{padding:20px}.metric span{display:block;color:var(--muted);font-size:12px}.metric strong{display:block;font-size:30px;margin-top:7px}.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:20px}.course-card{padding:24px;color:#fff}.course-badge,.pill{display:inline-flex;padding:5px 9px;border-radius:999px;background:rgba(118,230,189,.10);border:1px solid rgba(118,230,189,.18);font-size:11px;color:var(--accent)}.pill.active{background:rgba(122,169,255,.14);color:#cce0ff}.arrow{display:block;margin-top:18px}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.question-card{max-width:900px;margin:20px auto;padding:28px}.question-meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px}.question-card h2,.test-question h2{font-size:25px;line-height:1.3}.options{display:grid;gap:10px;margin:22px 0}.option{padding:15px;text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.03);border-radius:13px;color:#fff;cursor:pointer}.option.correct{border-color:rgba(118,230,189,.55);background:rgba(118,230,189,.12)}.option.wrong{border-color:rgba(255,113,132,.55);background:rgba(255,113,132,.10)}.explain{padding:15px;border-left:3px solid var(--accent);background:rgba(118,230,189,.05);margin:18px 0}.hidden{display:none}.empty{padding:25px;text-align:center}.footer{max-width:1200px;margin:auto;padding:25px 20px 45px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:15px}.test-head{display:flex;justify-content:space-between;align-items:center;padding:22px;margin:22px 0}.timer{font:800 30px/1 ui-monospace,Consolas,monospace;background:#06101b;padding:11px 16px;border-radius:15px}.test-layout{display:grid;grid-template-columns:1fr 250px;gap:18px}.test-question{padding:24px;margin-bottom:15px}.radio-option{display:flex;align-items:flex-start;gap:10px;padding:12px;background:rgba(255,255,255,.025);border-radius:12px}.radio-option input{width:auto;margin:3px 0 0}.test-nav{padding:18px;position:sticky;top:15px;height:max-content}.number-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.number-grid a{display:grid;place-items:center;padding:8px;border-radius:9px;background:rgba(255,255,255,.04)}.submit-test{margin-top:10px}.score-ring{width:180px;height:180px;border-radius:50%;display:grid;place-items:center;margin:25px auto;background:conic-gradient(var(--accent) 0 70%,rgba(255,255,255,.07) 70%);position:relative}.score-ring:after{content:"";position:absolute;inset:9px;background:#091522;border-radius:50%}.score-ring strong,.score-ring span{position:relative;z-index:2}.score-ring strong{font-size:28px}.score-ring span{margin-top:64px;color:var(--muted);position:absolute}.result-card{max-width:700px;margin:45px auto;text-align:center;padding:30px}.admin-shell{display:grid;grid-template-columns:220px 1fr;gap:18px}.sidebar{position:sticky;top:15px;height:max-content;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.03);padding:12px}.sidebar-title{font-weight:900;padding:12px}.sidebar a{display:block;padding:11px 12px;border-radius:10px}.sidebar a:hover{background:rgba(255,255,255,.05);text-decoration:none}.admin-content{min-width:0}.admin-panel{padding:22px;margin-bottom:18px;overflow:auto}.inline-form{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.settings-grid .btn{grid-column:1/-1}.status{font-size:11px}.status.published{color:var(--accent)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-size:12px}code{background:#06101a;padding:3px 5px;border-radius:5px}@media(max-width:900px){.hero{grid-template-columns:1fr}.feature-grid{grid-template-columns:1fr 1fr}.metric-grid{grid-template-columns:1fr 1fr}.test-layout,.admin-shell{grid-template-columns:1fr}.test-nav{position:static}.footer{flex-direction:column}}@media(max-width:600px){.topbar nav a:not(.btn){display:none}.hero{padding:35px 0}.feature-grid,.card-grid,.metric-grid{grid-template-columns:1fr}.settings-grid{grid-template-columns:1fr}.hero h1{font-size:43px}}