/* Hub pages: landing page and lecture pages */

/* hero */
.hero{padding:56px 0 40px}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;align-items:center}
.hero h1{font-size:clamp(42px,7.4vw,84px);font-weight:900;letter-spacing:-.03em;line-height:.98;margin:14px 0 18px}
.hero h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:2%;right:2%;bottom:.04em;height:.14em;background:var(--accent);opacity:.18;border-radius:4px}
.hero .lede{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:40ch}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.facts{display:flex;gap:10px 22px;flex-wrap:wrap;margin-top:26px;font-weight:700;color:var(--muted);font-size:15px}
.facts b{font-family:var(--display);color:var(--heading);font-size:22px;margin-right:6px}
.stagebox{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px}
.stagebox .bubble{max-width:380px;font-size:17px}
.stagebox .host{width:min(56vw,250px);cursor:pointer;margin-top:14px}
.stagebox .hero-desk{width:min(70vw,320px);height:30px;margin-top:-12px}
.stagebox .hint{font-size:13px;font-weight:700;color:var(--muted)}
.stagebox .nameplate{font:800 13px/1 var(--font);letter-spacing:.06em;text-transform:uppercase;background:var(--heading);color:var(--panel);padding:8px 14px;border-radius:999px;margin-top:4px}
@media (min-width:900px){
  .hero{padding:72px 0 56px}
  .hero .wrap{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:40px}
}

/* sections */
.section{padding:40px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.section-head h2{font-size:clamp(30px,4vw,44px);font-weight:900}
.section-head p{color:var(--muted);max-width:52ch}

/* lecture map */
.part{margin-top:30px}
.part:first-child{margin-top:0}
.part-title{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.part-title h3{font-size:22px}
.part-title .line{flex:1;height:1px;background:var(--line-2)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.lcard{position:relative;display:flex;flex-direction:column;gap:8px;padding:18px 18px 16px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);transition:transform .15s ease,box-shadow .15s ease,border-color .15s;min-height:190px;overflow:hidden}
a.lcard:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 2px 4px rgba(30,24,51,.06),0 18px 40px rgba(58,28,113,.16)}
.lcard .num{font:900 44px/1 var(--display);color:var(--accent);letter-spacing:-.03em}
.lcard .ico{position:absolute;right:16px;top:16px;font-size:28px}
.lcard h4{font-size:21px}
.lcard p{color:var(--muted);font-size:15px;line-height:1.45}
.lcard .foot{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:8px}
.lcard .foot .stars{margin-left:auto}
.lcard.open{background:linear-gradient(160deg,var(--panel) 55%,var(--accent-soft))}
.lcard.soon{box-shadow:none;background:var(--panel-2);border-style:dashed}
.lcard.soon .num{color:var(--line-2)}
.lcard.soon h4{color:var(--muted)}
.lcard.soon .ico{filter:grayscale(1);opacity:.5}

/* course info */
.info{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
@media (min-width:860px){.info{grid-template-columns:repeat(3,minmax(0,1fr))}}
.info .box ul{margin:6px 0 0;padding-left:18px}
.info .box p+p{margin-top:6px}
.info .who{display:flex;flex-direction:column;gap:2px}
.info .who b{font-size:17px}
.lit{margin-top:14px}
.lit ul{list-style:none;margin:0;padding:0}
.lit li{padding:10px 0;border-top:1px solid color-mix(in srgb,var(--box-line) 30%,transparent);display:flex;flex-direction:column}
.lit li:first-child{border-top:0;padding-top:2px}
.lit li span{font-size:14px;opacity:.8}
.lit li.main b::after{content:" ★";color:var(--gold)}
.lit .bb{display:grid;grid-template-columns:minmax(0,1fr);gap:16px 28px}
@media (min-width:860px){.lit .bb{grid-template-columns:repeat(2,minmax(0,1fr))}}
.lit h5{margin:0 0 4px;font:800 13px/1.2 var(--display);letter-spacing:.06em;text-transform:uppercase;opacity:.75}
.lit .litnote{font-size:14px;opacity:.85;margin:0 0 4px}

/* lecture page */
.lhero{padding:40px 0 10px}
.lhero .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:center}
.lhero .num{font:900 clamp(64px,10vw,120px)/.9 var(--display);color:var(--accent);letter-spacing:-.04em}
.lhero h1{font-size:clamp(36px,6vw,64px);font-weight:900;letter-spacing:-.03em;margin:6px 0 14px}
.lhero .summary{color:var(--muted);font-size:17px;max-width:62ch}
.lhero .hostrow{display:flex;align-items:center;gap:14px}
.lhero .hostrow .hostwrap{width:130px;flex:none}.lhero .hostrow .host{width:100%;cursor:pointer}
.lhero .hostrow .bubble{flex:1}
@media (min-width:960px){
  .lhero .wrap{grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr)}
  /* wide screens: bubble on top, a bigger host below it (like the home stage) */
  .lhero .hostrow{flex-direction:column;gap:4px}
  .lhero .hostrow .bubble{order:-1;align-self:stretch;margin-bottom:14px}
  .lhero .hostrow .bubble.left::after{left:50%;top:auto;bottom:-19px;margin-left:-10px;border-right-color:transparent;border-top-color:var(--cream)}
  .lhero .hostrow .hostwrap{width:210px}
}
.goals{margin-top:18px}
.goals ul{margin:4px 0 0;padding-left:20px}
.gcard{display:flex;flex-direction:column;gap:10px;padding:20px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);transition:transform .15s ease,box-shadow .15s,border-color .15s;min-height:230px}
.gcard:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 2px 4px rgba(30,24,51,.06),0 18px 40px rgba(58,28,113,.16)}
.gcard .gtop{display:flex;align-items:center;gap:12px}
.gcard .gico{display:grid;place-items:center;width:56px;height:56px;border-radius:16px;background:var(--accent-soft);font-size:30px;flex:none}
.gcard h4{font-size:23px}
.gcard p{color:var(--muted);font-size:15.5px}
.gcard .tags{display:flex;gap:6px;flex-wrap:wrap}
.gcard .foot{display:flex;align-items:center;gap:10px;margin-top:auto;font-weight:700;font-size:14px;color:var(--muted)}
.gcard .foot .play{margin-left:auto;color:var(--accent);font-weight:800}
.links{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}
.link{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:14px;background:var(--panel);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600;line-height:1.3}
.link:hover{border-color:var(--accent)}
.link .k{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--box);font-size:18px;flex:none}
.link .u{display:block;font-size:12px;color:var(--muted);font-weight:600;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:32ch}
.notfound{padding:80px 0;text-align:center}

/* disclaimer strip between hero and lecture map */
.notice{padding:0 0 8px}
.notice .disclaimer{margin:0 auto 0 0}

/* legal notice & privacy */
.legal .wrap{max-width:820px}
.legal h1{font-size:clamp(34px,6vw,56px);font-weight:900;letter-spacing:-.03em;margin:0 0 8px;hyphens:auto}
.legal h2{font-size:clamp(26px,4vw,34px);margin:34px 0 10px}
.legal h3{font-size:19px;margin:22px 0 6px}
.legal p,.legal li{line-height:1.6;color:var(--ink)}
.legal p+p{margin-top:10px}
.legal ul{padding-left:20px;margin:6px 0}
.legal code{font-size:.92em;background:var(--panel-2);border-radius:6px;padding:1px 5px}
.legal a{overflow-wrap:anywhere}
.legal .muted{margin-top:26px;font-size:14px}