:root{
  --paper:#F4F6F3;--white:#fff;--ink:#12182B;--ink2:#565F70;--muted:#8890A0;
  --teal:#1E8A80;--teal2:#146059;--amber:#E2A63B;--line:#DCE1DE;--line2:#BEC6C2;
  --max:1180px;--side:clamp(18px,4vw,44px)
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,sans-serif;overflow-x:hidden}
button,a{font:inherit;color:inherit} a{text-decoration:none} button{cursor:pointer} .wrap{width:min(var(--max),calc(100% - var(--side)*2));margin-inline:auto}
::selection{background:rgba(30,138,128,.18)}
header{position:sticky;top:0;z-index:80;background:rgba(244,246,243,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font:700 18px "Space Grotesk"} .brand svg{width:32px;height:32px}
.desktop-nav{display:flex;align-items:center;gap:20px;font-size:12px;color:var(--ink2)} .desktop-nav a:hover{color:var(--teal2)}
.course-tag{font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--teal2);border:1px solid var(--line);padding:8px 10px;border-radius:999px}
#drawerToggle{position:fixed;opacity:0;pointer-events:none} .menu-trigger,.drawer,.scrim{display:none}

.course-hero{padding:64px 0 44px;border-bottom:1px solid var(--line)}
.course-kicker{font:600 10px "IBM Plex Mono";letter-spacing:.11em;color:var(--teal2);text-transform:uppercase;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.course-kicker:before{content:"";width:18px;height:1px;background:var(--amber)}
.course-title-row{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(240px,.6fr);gap:40px;align-items:end}
.course-hero h1{margin:0;font:700 clamp(54px,8vw,104px)/.88 "Space Grotesk";letter-spacing:-.06em;max-width:9ch}
.course-side{padding-bottom:8px} .course-side p{margin:0;color:var(--ink2);line-height:1.65;max-width:36ch;font-size:15px}
.course-metrics{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px} .metric{font:500 9px "IBM Plex Mono";color:var(--muted)} .metric b{display:block;font:700 21px "Space Grotesk";color:var(--ink);margin-bottom:2px}

.viewbar{position:sticky;top:66px;z-index:50;background:rgba(244,246,243,.96);border-bottom:1px solid var(--line)}
.viewtabs{display:flex;gap:0;overflow-x:auto;scrollbar-width:none} .viewtabs::-webkit-scrollbar{display:none}
.viewtab{appearance:none;border:0;background:transparent;padding:17px 20px 15px 0;margin-right:26px;white-space:nowrap;font:600 10px "IBM Plex Mono";letter-spacing:.07em;color:var(--muted);border-bottom:2px solid transparent}
.viewtab.active{color:var(--ink);border-bottom-color:var(--amber)}

.view{display:none;padding:54px 0 90px} .view.active{display:block}
.section-head{display:grid;grid-template-columns:150px 1fr;gap:28px;margin-bottom:38px}
.section-label{font:600 10px "IBM Plex Mono";letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.section-head h2{margin:0;font:700 clamp(36px,5vw,66px)/.97 "Space Grotesk";letter-spacing:-.045em;max-width:14ch}

.current-grid{display:grid;grid-template-columns:minmax(220px,.56fr) minmax(0,1.44fr);gap:clamp(28px,7vw,88px);align-items:start}
.week-id{padding-bottom:24px;border-bottom:1px solid var(--line)} .week-id .lbl{font:600 9px "IBM Plex Mono";letter-spacing:.1em;color:var(--muted)} .week-id .num{font:700 clamp(96px,15vw,174px)/.82 "Space Grotesk";letter-spacing:-.07em;margin-top:4px} .week-id .date{font:500 10px "IBM Plex Mono";letter-spacing:.08em;color:var(--muted);margin-top:14px}
.current-copy .state{font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--teal2);margin-bottom:14px} .current-copy h3{margin:0 0 12px;font:650 clamp(30px,4vw,52px)/1 "Space Grotesk";letter-spacing:-.04em} .current-copy p{margin:0;color:var(--ink2);line-height:1.7;max-width:62ch}
.theme-line{margin-top:14px;font:500 10px "IBM Plex Mono";color:var(--muted)} .theme-line b{color:var(--teal2);font-weight:600}
.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:25px} .btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 15px;border:1px solid var(--line2);border-radius:4px;font:600 10px "IBM Plex Mono";background:transparent} .btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)} .btn:hover{border-color:var(--teal);color:var(--teal2)} .btn.primary:hover{background:var(--teal2);color:#fff}

.curriculum-strip{margin-top:42px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;display:flex;gap:10px;align-items:flex-start}
.curriculum-strip .csl{flex:0 0 130px;font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--amber)} .curriculum-strip .csv{font:500 11px/1.55 "IBM Plex Mono";color:var(--ink2)}

.week-list{border-top:1px solid var(--line)} .week-row{display:grid;grid-template-columns:58px 130px minmax(0,1fr) 110px;gap:18px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);cursor:pointer;position:relative}
.week-row:hover{padding-left:10px} .week-row .wn{font:600 10px "IBM Plex Mono";color:var(--amber)} .week-row .wd{font:500 9px/1.5 "IBM Plex Mono";color:var(--muted)} .week-row .wt{font:600 clamp(19px,2.2vw,28px)/1.08 "Space Grotesk";letter-spacing:-.025em} .week-row .wtheme{margin-top:6px;font:400 10px/1.45 "IBM Plex Mono";color:var(--muted)} .week-row .ws{justify-self:end;font:600 9px "IBM Plex Mono";color:var(--teal2)} .week-row.special .wt{color:var(--muted)} .week-row.special{opacity:.72}
.term-sep{padding:14px 0;border-bottom:1px solid var(--line);font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--teal2);background:linear-gradient(to right,rgba(30,138,128,.04),transparent)}

.curriculum{border-top:1px solid var(--line)} .theme-block{border-bottom:1px solid var(--line);padding:30px 0}
.theme-top{display:grid;grid-template-columns:62px minmax(0,1fr) auto;gap:18px;align-items:start;cursor:pointer} .theme-no{font:600 10px "IBM Plex Mono";color:var(--amber);padding-top:6px} .theme-top h3{margin:0;font:650 clamp(27px,3.8vw,44px)/1.03 "Space Grotesk";letter-spacing:-.04em} .theme-count{font:500 9px "IBM Plex Mono";color:var(--muted);padding-top:8px}
.outcomes{display:none;margin:26px 0 0 80px;border-top:1px dashed var(--line2)} .theme-block.open .outcomes{display:block}
.outcome{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:18px;padding:18px 0;border-bottom:1px dashed var(--line)} .ocode{font:600 10px "IBM Plex Mono";color:var(--teal2)} .odesc{font-size:14px;line-height:1.5} .oweeks{font:500 9px "IBM Plex Mono";color:var(--muted);white-space:nowrap} .osteps{display:none;grid-column:2/4;margin-top:2px;padding:12px 0 2px} .outcome.open .osteps{display:block} .osteps li{margin:6px 0;color:var(--ink2);font-size:12px;line-height:1.5}

.lesson{display:none;padding:40px 0 100px} .lesson.active{display:block} .shell-hidden{display:none!important}
.lesson-back{appearance:none;border:0;background:transparent;padding:0;margin-bottom:30px;font:600 10px "IBM Plex Mono";color:var(--teal2)}
.lesson-head{display:grid;grid-template-columns:110px minmax(0,1fr);gap:28px;padding-bottom:36px;border-bottom:1px solid var(--line)} .lesson-index{font:700 74px/.86 "Space Grotesk";letter-spacing:-.06em} .lesson-index small{display:block;margin-bottom:8px;font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--muted)} .lesson-title .ey{font:600 9px "IBM Plex Mono";letter-spacing:.08em;color:var(--teal2);margin-bottom:9px} .lesson-title h2{margin:0;font:700 clamp(40px,6vw,76px)/.93 "Space Grotesk";letter-spacing:-.052em;max-width:13ch} .lesson-meta{margin-top:13px;font:500 10px/1.6 "IBM Plex Mono";color:var(--muted)}
.lesson-flow{margin-top:42px} .flow-section{display:grid;grid-template-columns:110px minmax(0,1fr);gap:28px;padding:34px 0;border-bottom:1px solid var(--line)} .flow-n{font:600 10px "IBM Plex Mono";letter-spacing:.08em;color:var(--amber)} .flow-title{margin:0 0 13px;font:650 clamp(26px,3.5vw,42px)/1.02 "Space Grotesk";letter-spacing:-.035em} .flow-desc{margin:0;color:var(--ink2);line-height:1.65;max-width:62ch;font-size:13px}
.slide-demo{margin-top:22px;background:var(--ink);color:#fff;aspect-ratio:16/9;border-radius:6px;display:grid;place-items:center;position:relative;overflow:hidden} .slide-demo:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent 60%,rgba(30,138,128,.14))} .slide-inner{position:relative;text-align:left;width:76%} .slide-inner .mini{font:600 9px "IBM Plex Mono";color:#88c9c2;margin-bottom:8px} .slide-inner strong{display:block;font:650 clamp(24px,4vw,48px)/1 "Space Grotesk";letter-spacing:-.04em;max-width:12ch} .slide-inner small{display:block;margin-top:14px;color:#aab3c7;font:500 9px "IBM Plex Mono"}
.material-rail{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px} .mat{border:1px solid var(--line);min-height:118px;padding:16px;display:flex;flex-direction:column;justify-content:space-between;background:rgba(255,255,255,.28)} .mat b{font:600 15px "Space Grotesk"} .mat span{font:500 9px "IBM Plex Mono";color:var(--muted)}
.teacher-desk{margin-top:22px;border-top:1px solid var(--line2);padding-top:18px} .teacher-desk summary{cursor:pointer;font:600 10px "IBM Plex Mono";letter-spacing:.08em;color:var(--teal2)} .teacher-content{padding:20px 0 0} .teacher-box{border-left:2px solid var(--amber);padding-left:18px;margin:18px 0} .teacher-box .code{font:600 10px "IBM Plex Mono";color:var(--teal2);margin-bottom:6px} .teacher-box p{margin:0;font-size:13px;line-height:1.55} .teacher-box ul{margin:12px 0 0;padding-left:18px;color:var(--ink2);font-size:12px;line-height:1.5}

.preview-note{margin-top:32px;font:500 9px/1.55 "IBM Plex Mono";color:var(--muted);border-top:1px dashed var(--line2);padding-top:14px}

@media(max-width:820px){
  .desktop-nav{display:none} .menu-trigger{display:flex;align-items:center;gap:8px;border:1px solid var(--line);padding:9px 11px;border-radius:999px;font:600 9px "IBM Plex Mono"}
  .scrim{display:block;position:fixed;inset:0;z-index:98;background:rgba(18,24,43,.15);opacity:0;visibility:hidden}
  .drawer{display:flex;flex-direction:column;position:fixed;z-index:99;inset:0 auto 0 0;width:min(88vw,380px);background:var(--paper);transform:translateX(-103%);transition:.28s;border-radius:0 24px 24px 0;overflow:auto}
  #drawerToggle:checked ~ .scrim{opacity:1;visibility:visible} #drawerToggle:checked ~ .drawer{transform:none}
  .drawer-top{min-height:70px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)} .drawer-close{font-size:24px}
  .drawer-course{padding:22px 20px;border-bottom:1px solid var(--line)} .drawer-course .sm{font:600 8px "IBM Plex Mono";color:var(--amber)} .drawer-course b{display:block;font:650 23px "Space Grotesk";margin-top:5px}
  .drawer a.navx{display:block;padding:18px 20px;border-bottom:1px solid var(--line);font:600 18px "Space Grotesk"}
  .course-title-row,.current-grid{grid-template-columns:1fr} .course-side{padding-bottom:0} .course-hero{padding-top:46px}
  .section-head{grid-template-columns:1fr;gap:10px} .view{padding-top:40px}
  .week-row{grid-template-columns:42px minmax(0,1fr) 34px;gap:12px} .week-row .wd{grid-column:2} .week-row .wt{grid-column:2} .week-row .ws{grid-column:3;grid-row:1/4;align-self:center} .week-row .wtheme{grid-column:2}
  .theme-top{grid-template-columns:38px minmax(0,1fr) auto} .outcomes{margin-left:0} .outcome{grid-template-columns:98px minmax(0,1fr)} .oweeks{grid-column:2} .osteps{grid-column:2}
  .lesson-head,.flow-section{grid-template-columns:1fr;gap:12px} .lesson-index{font-size:54px} .material-rail{grid-template-columns:1fr}
}
@media(max-width:480px){
  .course-hero h1{font-size:56px} .course-metrics{gap:14px} .metric b{font-size:19px}
  .viewtabs .viewtab{margin-right:20px;padding-right:8px}
  .week-row{padding:18px 0} .week-row:hover{padding-left:0}
  .theme-count{display:none} .outcome{grid-template-columns:1fr;gap:6px} .oweeks,.osteps{grid-column:1} .lesson-title h2{font-size:46px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}