:root{
  --bg:#0a0a12; --panel:#12121f; --panel2:#171728; --line:#26263c;
  --text:#eef0ff; --muted:#9aa0c0; --violet:#6D5DFC; --blue:#3b82f6; --cyan:#22d3ee;
  --grad:linear-gradient(135deg,#6D5DFC 0%,#3b82f6 50%,#22d3ee 100%);
  --ok:#34d399; --lock:#5b6079; --warn:#f59e0b; --bad:#f87171;
  --r:14px;
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:'Manrope',system-ui,Arial,sans-serif;line-height:1.6;
  background-image:radial-gradient(900px 500px at 80% -10%,rgba(109,93,252,.15),transparent),radial-gradient(700px 400px at -10% 10%,rgba(34,211,238,.08),transparent);}
a{color:#bcd0ff;text-decoration:none} a:hover{color:#fff}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.topbar{position:sticky;top:0;z-index:20;background:rgba(10,10,18,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.2px}
.brand .mk{width:34px;height:34px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:800}
.brand small{display:block;font-weight:500;color:var(--muted);font-size:11px;letter-spacing:.12em;text-transform:uppercase}
nav.main{margin-left:auto;display:flex;gap:18px;align-items:center;font-size:14px}
.btn{display:inline-block;border:0;cursor:pointer;border-radius:10px;padding:11px 18px;font-weight:700;font-family:inherit;font-size:14px}
.btn-primary{background:var(--grad);color:#fff} .btn-primary:hover{filter:brightness(1.08);color:#fff}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.hero{padding:90px 0 60px;text-align:center}
.kicker{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.hero h1{font-size:clamp(34px,6vw,60px);line-height:1.05;margin:14px 0 10px;font-weight:800;
  background:linear-gradient(180deg,#fff,#c7ccf0);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:19px;color:var(--muted);max-width:680px;margin:0 auto 26px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.grid{display:grid;gap:18px}
.cols-3{grid-template-columns:repeat(3,1fr)} .cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:820px){.cols-3,.cols-2{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h3{margin:0 0 8px;font-size:18px} .card p{margin:0;color:var(--muted)}
.section{padding:54px 0;border-top:1px solid var(--line)}
.section h2{font-size:30px;margin:0 0 8px;font-weight:800}
.section .sub{color:var(--muted);margin:0 0 26px}
.levelrail{display:flex;flex-direction:column;gap:14px}
.level{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.level-head{display:flex;align-items:center;gap:14px;padding:16px 20px;border-bottom:1px solid var(--line)}
.lnum{width:42px;height:42px;border-radius:11px;background:var(--panel2);border:1px solid var(--line);display:grid;place-items:center;font-weight:800;color:var(--cyan)}
.level.locked .lnum{color:var(--lock)}
.level-head h3{margin:0;font-size:17px} .level-head .meta{color:var(--muted);font-size:13px}
.badge{font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;letter-spacing:.04em}
.b-locked{background:rgba(91,96,121,.18);color:var(--lock)} .b-open{background:rgba(34,211,238,.14);color:var(--cyan)}
.b-done{background:rgba(52,211,153,.16);color:var(--ok)}
.courselist{padding:8px 12px}
.courserow{display:flex;align-items:center;gap:12px;padding:11px 10px;border-radius:10px}
.courserow+.courserow{border-top:1px solid var(--line)}
.courserow .ci{width:26px;text-align:center;color:var(--muted)}
.courserow .ct{flex:1} .courserow .ct b{font-weight:600;font-size:15px}
.courserow.locked .ct b{color:var(--lock)}
.progress{height:8px;background:var(--panel2);border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.progress > i{display:block;height:100%;background:var(--grad)}
.resume{background:linear-gradient(135deg,rgba(109,93,252,.16),rgba(34,211,238,.08));border:1px solid #2b2b50}
.lesson-body{font-size:16.5px} .lesson-body h4{color:var(--cyan);margin:22px 0 6px;font-size:15px;letter-spacing:.02em}
.lesson-body p{margin:0 0 14px}
.quiz .q{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:16px;margin:0 0 14px}
.quiz .q .prompt{font-weight:700;margin-bottom:10px}
.quiz label{display:flex;gap:10px;align-items:flex-start;padding:9px 11px;border:1px solid var(--line);border-radius:9px;margin:7px 0;cursor:pointer}
.quiz label:hover{border-color:#3b3b60}
.result{border-radius:12px;padding:16px;margin:0 0 18px;border:1px solid var(--line)}
.result.pass{background:rgba(52,211,153,.1);border-color:#1f6b50}
.result.fail{background:rgba(248,113,113,.08);border-color:#7a3030}
.flash{padding:12px 16px;border-radius:10px;margin:14px 0;border:1px solid var(--line);background:var(--panel2)}
.flash.err{border-color:#7a3030;background:rgba(248,113,113,.08)}
.field{margin:0 0 14px} .field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:10px;color:var(--text);padding:12px;font-family:inherit;font-size:15px}
.authbox{max-width:420px;margin:60px auto}
.footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:13px;text-align:center;margin-top:40px}
.lock-ico{color:var(--lock)} .tick{color:var(--ok)}
table.tbl{width:100%;border-collapse:collapse} table.tbl th,table.tbl td{text-align:left;padding:10px;border-bottom:1px solid var(--line);font-size:14px}
.cert{max-width:760px;margin:40px auto;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:40px;text-align:center}
.cert .seal{width:70px;height:70px;border-radius:50%;background:var(--grad);margin:0 auto 16px;display:grid;place-items:center;font-weight:800}
.pill{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:12px;color:var(--muted);margin:3px}