:root{--bg:#090d1c;--panel:#11172b;--panel2:#171f39;--line:#273251;--text:#f4f7ff;--muted:#aeb9d4;--accent:#7c8cff;--accent2:#28d8b4;--danger:#ff6b7a;--warn:#ffc857;--ok:#45d483;--shadow:0 20px 70px rgba(0,0,0,.28);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 80% -10%,rgba(124,140,255,.16),transparent 30%),var(--bg);color:var(--text);line-height:1.6}a{color:#b9c3ff;text-decoration:none}a:hover{color:#fff}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1240px)/2));border-bottom:1px solid rgba(255,255,255,.07);background:rgba(9,13,28,.9);backdrop-filter:blur(16px);position:sticky;top:0;z-index:30}.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.08rem}.brand b{color:var(--accent2)}.brand-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),#a66cff);box-shadow:0 8px 28px rgba(124,140,255,.28)}nav{display:flex;align-items:center;gap:7px}nav a,nav .nav-user{padding:9px 12px;border-radius:9px;font-size:.92rem}nav a.active{background:var(--panel2);color:#fff}.nav-user{color:var(--muted);border-left:1px solid var(--line);margin-left:6px}.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:1.4rem}.page{max-width:1240px;margin:0 auto;padding:34px 24px 80px;min-height:calc(100vh - 150px)}footer{border-top:1px solid rgba(255,255,255,.07);padding:26px max(24px,calc((100vw - 1240px)/2));display:flex;justify-content:space-between;color:var(--muted);font-size:.9rem}footer div:first-child{display:flex;gap:16px}.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:38px;align-items:center;padding:65px 0 56px}.eyebrow{font-weight:800;text-transform:uppercase;letter-spacing:.16em;color:var(--accent2);font-size:.78rem}.hero h1{font-size:clamp(2.6rem,6vw,5.2rem);line-height:1.01;letter-spacing:-.055em;margin:12px 0 20px;max-width:850px}.hero p{font-size:1.16rem;color:var(--muted);max-width:720px}.hero-card,.card,.panel{background:linear-gradient(180deg,rgba(23,31,57,.95),rgba(16,22,42,.95));border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.hero-card{padding:24px}.hero-card .metric{display:flex;justify-content:space-between;align-items:center;padding:15px 0;border-bottom:1px solid var(--line)}.hero-card .metric:last-child{border-bottom:0}.metric strong{font-size:1.5rem}.button,button,input[type=submit]{appearance:none;border:0;background:linear-gradient(135deg,var(--accent),#a66cff);color:white;padding:12px 18px;border-radius:11px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:800}.button:hover,button:hover,input[type=submit]:hover{filter:brightness(1.08);color:#fff}.button.secondary,button.secondary{background:var(--panel2);border:1px solid var(--line);color:#fff}.button.danger,button.danger{background:rgba(255,107,122,.12);border:1px solid rgba(255,107,122,.38);color:#ff9ba6}.button.small{padding:8px 12px;font-size:.85rem}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:32px 0 18px}.section-head h2{font-size:1.9rem;margin:0}.section-head p{color:var(--muted);margin:0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.course-card{padding:22px;display:flex;flex-direction:column;min-height:300px}.course-icon{font-size:2rem}.course-card h3{font-size:1.25rem;margin:12px 0 8px;line-height:1.25}.course-card p{color:var(--muted);font-size:.94rem;flex:1}.card-meta{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.badge{display:inline-flex;padding:5px 9px;border-radius:999px;background:#222d4e;color:#cbd4ef;border:1px solid #314064;font-size:.76rem;font-weight:700}.badge.ok{background:rgba(69,212,131,.09);color:#7be4a8;border-color:rgba(69,212,131,.35)}.badge.lock{background:rgba(255,200,87,.08);color:#ffd778;border-color:rgba(255,200,87,.3)}.badge.danger{background:rgba(255,107,122,.08);color:#ff9ba6;border-color:rgba(255,107,122,.3)}.progress{height:8px;border-radius:99px;background:#232c48;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:99px}.panel{padding:24px}.panel h1,.panel h2,.panel h3{margin-top:0}.split{display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:start}.sidebar{position:sticky;top:96px}.module{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;background:rgba(17,23,43,.7)}.module-head{padding:16px 18px;display:flex;justify-content:space-between;gap:14px;align-items:center}.module-head h3{margin:0;font-size:1.02rem}.module-body{border-top:1px solid var(--line);padding:8px}.lesson-link{display:flex;justify-content:space-between;gap:16px;padding:10px 11px;border-radius:9px;color:#dbe2f8}.lesson-link:hover{background:var(--panel2)}.lesson-link small{color:var(--muted)}.lesson{max-width:880px}.lesson h1{font-size:2.3rem;line-height:1.1}.lesson-content{font-size:1.03rem}.lesson-content h2{margin-top:30px}.lesson-content h3{margin-top:24px}.lesson-content pre,.codebox{background:#060914;border:1px solid #202a46;padding:16px;border-radius:12px;overflow:auto}.lesson-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#dbe0ff}.callout{padding:15px 17px;border:1px solid rgba(124,140,255,.35);border-left:4px solid var(--accent);background:rgba(124,140,255,.08);border-radius:10px;margin:18px 0}.strict{border-left-color:var(--warn);background:rgba(255,200,87,.07);border-color:rgba(255,200,87,.28)}.alert{padding:13px 16px;border-radius:11px;margin-bottom:18px;border:1px solid var(--line);background:var(--panel2)}.alert.success{border-color:rgba(69,212,131,.35);background:rgba(69,212,131,.08)}.alert.error{border-color:rgba(255,107,122,.35);background:rgba(255,107,122,.08)}.alert.warning{border-color:rgba(255,200,87,.35);background:rgba(255,200,87,.08)}form.stack{display:grid;gap:14px}label{font-weight:700;font-size:.9rem}input,textarea,select{width:100%;border:1px solid var(--line);background:#0b1021;color:#fff;padding:12px 13px;border-radius:10px;font:inherit}textarea{min-height:130px;resize:vertical}input:focus,textarea:focus,select:focus{outline:2px solid rgba(124,140,255,.4);border-color:var(--accent)}.auth-wrap{max-width:520px;margin:50px auto}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.muted{color:var(--muted)}.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0 30px}.kpi{padding:18px}.kpi strong{display:block;font-size:1.8rem}.kpi span{color:var(--muted);font-size:.85rem}.exam-shell{max-width:900px;margin:0 auto}.exam-top{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:18px}.timer{font-size:1.3rem;font-weight:900;color:var(--warn)}.question{padding:22px;margin-bottom:16px}.question h3{font-size:1rem;color:var(--muted);margin-bottom:8px}.question .prompt{font-size:1.06rem;font-weight:700;margin-bottom:14px}.option{display:flex;align-items:flex-start;gap:10px;padding:10px;border:1px solid var(--line);border-radius:9px;margin:8px 0;font-weight:500}.option input{width:auto;margin-top:5px}.result-score{font-size:4rem;font-weight:900;letter-spacing:-.06em}.result-pass{color:var(--ok)}.result-fail{color:var(--danger)}.feedback-item{padding:13px 0;border-bottom:1px solid var(--line)}.tutor-box{display:grid;grid-template-rows:1fr auto;min-height:540px}.chat{max-height:520px;overflow-y:auto;padding-right:6px}.bubble{padding:13px 15px;border-radius:13px;margin:9px 0;white-space:pre-wrap}.bubble.user{background:rgba(124,140,255,.14);margin-left:15%}.bubble.assistant{background:#0b1021;border:1px solid var(--line);margin-right:8%}.chat-form{display:flex;gap:9px;margin-top:14px}.chat-form textarea{min-height:58px;max-height:140px}.chat-form button{width:120px}.lab-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.lab-grid textarea{height:430px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.preview{width:100%;height:430px;border:1px solid var(--line);background:white;border-radius:10px}.console{background:#040711;border:1px solid var(--line);padding:12px;border-radius:10px;min-height:90px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}.table th{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.06em}.certificate{max-width:900px;margin:30px auto;padding:55px;border:2px solid var(--accent);background:radial-gradient(circle at 50% 0,rgba(124,140,255,.2),transparent 45%),#0e1428;text-align:center}.certificate h1{font-size:3rem;margin:10px}.certificate .name{font-size:2rem;font-weight:900}.empty{padding:35px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:14px}.pill-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.pill-nav a{padding:8px 12px;background:var(--panel2);border:1px solid var(--line);border-radius:999px}.pill-nav a.active{background:var(--accent);color:white}.install{max-width:760px;margin:30px auto}.install-checks{display:grid;gap:8px;margin:16px 0}.check{display:flex;justify-content:space-between;padding:10px 12px;border-radius:9px;background:#0b1021}.good{color:var(--ok)}.bad{color:var(--danger)}@media(max-width:900px){.hero,.split,.lab-grid{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}.kpis{grid-template-columns:repeat(2,1fr)}.sidebar{position:static}.hero{padding-top:35px}.hero-card{display:none}.topbar nav{display:none}.nav-toggle{display:block}.nav-open .topbar{height:auto;min-height:72px;align-items:flex-start;padding-top:18px;padding-bottom:18px;flex-wrap:wrap}.nav-open .topbar nav{display:flex;width:100%;flex-direction:column;align-items:stretch;padding-top:12px}.nav-open .nav-user{border-left:0}.form-row{grid-template-columns:1fr}}@media(max-width:600px){.page{padding:24px 15px 60px}.grid{grid-template-columns:1fr}.kpis{grid-template-columns:1fr 1fr}.hero h1{font-size:2.65rem}.section-head{align-items:start;flex-direction:column}.exam-top{align-items:flex-start;flex-direction:column}.chat-form{flex-direction:column}.chat-form button{width:100%}.certificate{padding:30px 18px}.certificate h1{font-size:2.2rem}footer{flex-direction:column;gap:8px}.topbar{padding-left:15px;padding-right:15px}}