:root{--bg:#09090b;--p:#141418;--p2:#1a1a20;--line:#2a2a33;--t:#eeeef2;--m:#a2a2b0;--b:#78a5ff;--r:#ff646e;--y:#f1c84b;--g:#55d69a;--o:#ff8748}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--t);font:16px/1.72 Inter,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:focus-visible{outline:2px solid var(--b);outline-offset:4px}
    .wrap{max-width:1680px;width:100%;margin:auto;padding:0 clamp(24px,4.5vw,72px)}.topbar{border-bottom:1px solid var(--line);background:rgba(9,9,11,.94)}.nav{min-height:64px;display:flex;align-items:center;gap:30px}.brand{font-size:.85rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}.brand span{color:var(--r)}.navlinks{display:flex;gap:24px;margin-left:auto;color:var(--m);font-size:.83rem}.navlinks a:hover{color:var(--t)}.nav-status{border:1px solid var(--line);background:var(--p);border-radius:8px;padding:5px 10px;color:var(--m);font-size:.73rem;white-space:nowrap}
    main{padding-top:30px;padding-bottom:70px}.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(240px,.75fr);gap:38px;align-items:center;padding:24px 0 30px}.eyebrow,.tag{display:inline-block;border:1px solid #63343a;background:#211316;color:var(--r);border-radius:8px;padding:5px 11px;font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.hero h1,h2{font-family:Georgia,"Times New Roman",serif;line-height:1.2;letter-spacing:-.02em}.hero h1{font-size:clamp(2.3rem,5vw,3.6rem);margin:.3em 0 .5em;max-width:700px}.hero h1 span{display:block;color:var(--t)}.intro{font-size:1.15rem;color:#b9bfd0;max-width:790px;margin:0}.meta{display:flex;flex-wrap:wrap;gap:10px 18px;color:var(--m);font-size:.88rem;margin:22px 0 0}.meta span{white-space:nowrap}.dot{display:inline-block;width:8px;height:8px;background:var(--r);border-radius:50%;margin-right:7px}.dot.blue{background:var(--b)}.dot.yellow{background:var(--y)}
    .hero-panel{background:linear-gradient(145deg,var(--p2),#111115);border:1px solid var(--line);border-radius:14px;padding:19px;min-height:190px;display:flex;flex-direction:column;justify-content:space-between}.panel-kicker{font-size:.68rem;color:var(--m);letter-spacing:.13em;text-transform:uppercase}.panel-title{font:700 1.18rem/1.3 Georgia,"Times New Roman",serif;margin:15px 0 8px}.panel-copy{font-size:.8rem;color:var(--m);margin:0}.panel-rule{height:1px;background:var(--line);margin:17px 0 12px}.panel-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.71rem;color:var(--m)}.panel-meta strong{color:var(--g);font-weight:600}.actions{display:flex;align-items:center;gap:18px;margin-top:21px}.button{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:9px 14px;font-size:.83rem;font-weight:700;transition:background .15s,border-color .15s}.button.primary{color:#11131a;background:var(--b)}.button.primary:hover{background:#98b9ff}.button.secondary{border:1px solid var(--line);color:var(--t)}.button.secondary:hover{border-color:#555561}
    .notice{border:1px solid #663136;border-radius:13px;padding:15px 19px;margin:8px 0 46px;background:#1e1215}.notice strong{color:var(--r);display:block;margin-bottom:3px}.notice p{margin:0;color:#c8b9bb;font-size:.88rem;line-height:1.65}
    .section{margin-top:46px}.section-head{display:flex;gap:18px;align-items:end;justify-content:space-between;margin-bottom:18px}.section-head h2{font-size:clamp(1.55rem,3vw,2rem);margin:8px 0 0}.section-head p{color:var(--m);font-size:.85rem;margin:0 0 3px}.section-lede{color:var(--m);margin:0 0 16px;font-size:.9rem}
    .cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin:20px 0}.card{border:1px solid var(--line);border-radius:14px;background:var(--p);padding:19px;display:flex;flex-direction:column;min-height:225px;transition:border-color .16s,transform .16s}.card:hover{border-color:#555561;transform:translateY(-2px)}.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:17px}.card .k{font-size:.7rem;color:var(--m);letter-spacing:.12em;text-transform:uppercase}.card .tag{font-size:.64rem;padding:4px 8px;letter-spacing:.08em}.tag.blue{color:var(--b);border-color:#34496b;background:#111722}.tag.yellow{color:var(--y);border-color:#6b5522;background:#1b180f}.card h3{font-size:1.1rem;margin:0 0 8px;line-height:1.35}.card p{color:var(--m);font-size:.86rem;line-height:1.65;margin:0 0 16px}.card-foot{border-top:1px solid var(--line);padding-top:11px;margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:9px;color:var(--m);font-size:.72rem}.card-foot .link{color:#b9bfd0;font-weight:600}.card-foot .link:hover{color:var(--b)}
    .lower{display:grid;grid-template-columns:1fr 1fr;gap:32px;border-top:1px solid var(--line);padding-top:27px;margin-top:35px}.lower h2{font-size:1.6rem;margin:7px 0 14px}.objectives{display:grid;grid-template-columns:1fr 1fr;gap:11px 15px}.objective{display:flex;align-items:flex-start;gap:9px;font-size:.82rem;color:#c7c7d0;line-height:1.5}.check{display:grid;place-items:center;flex:none;width:20px;height:20px;border:1px solid #28583f;border-radius:6px;color:var(--g);font-size:.75rem}.project{border-left:1px solid var(--line);padding-left:28px}.project p{font-size:.87rem;color:var(--m);margin:0 0 14px}.flow{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:.75rem}.flow span{border:1px solid var(--line);background:var(--p);padding:5px 9px;border-radius:7px;color:#c7c7d0}.flow i{font-style:normal;color:var(--b)}
    footer{border-top:1px solid var(--line);padding:18px 0 0;color:var(--m);font-size:.75rem}.footer-row{display:flex;justify-content:space-between;align-items:center;gap:14px}.footer-brand{font-weight:800;color:var(--t);letter-spacing:.07em;text-transform:uppercase}.footer-brand span{color:var(--r)}
    @media(max-width:760px){.hero{grid-template-columns:1fr;gap:23px}.hero-panel{min-height:155px}.section-head{align-items:flex-start;flex-direction:column;gap:6px}.lower{grid-template-columns:1fr;gap:22px}.project{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}}
    @media(max-width:600px){.wrap{padding:0 17px}.nav{gap:10px;flex-wrap:wrap;padding:12px 0}.navlinks{order:3;width:100%;justify-content:space-between;margin:0;gap:12px;font-size:.76rem}.nav-status{margin-left:auto}.hero{padding-top:19px}.hero h1{font-size:2.35rem}.intro{font-size:1rem}.meta{font-size:.76rem;gap:8px 13px}.notice{margin-bottom:34px;padding:13px}.section{margin-top:36px}.cards{grid-template-columns:1fr;gap:10px}.card{min-height:0}.objectives{grid-template-columns:1fr}.footer-row{align-items:flex-start;flex-direction:column}.actions{align-items:flex-start;flex-direction:column;gap:8px}.button.primary{min-height:42px}}
    @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
    .card.is-release-locked{cursor:not-allowed;opacity:.82}.card.is-release-locked:hover{transform:none;border-color:var(--line)}.lesson-release-status{display:block;flex-basis:100%;margin-top:5px;color:var(--y);font-size:.75rem;line-height:1.45}.card .lesson-release-status{padding-top:8px;border-top:1px solid var(--line)}
    footer.course-site-footer{padding:0}
/* Mobile: comfortable touch targets and tags that wrap inside narrow cards. */
@media(max-width:600px){
  .navlinks a,.nav-status{min-height:44px}
  .navlinks a{display:inline-flex;align-items:center;padding:8px 2px}
  .nav-status{display:inline-flex;align-items:center;justify-content:center}
  .button{min-height:44px}
  .card-head{flex-wrap:wrap;justify-content:flex-start}
  .card .tag{max-width:100%;white-space:normal;line-height:1.4}
}