/* UW Composites Group: shared style for subpages (courses, books, cookbook, 404).
   Matches the homepage (light paper, serif headings, UW purple and gold). */
:root{--paper:#faf9f6;--white:#fff;--ink:#1f1b2d;--muted:#5d5770;--soft:#8a849b;--line:#e6e2ec;--purple:#4b2e83;--purple-2:#6b4fb0;--tint:#f2eef9;--gold:#b7a57a;--radius:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--purple)}
img{max-width:100%;display:block}
h1,h2,h3{font-family:'Source Serif 4',Georgia,serif;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.wrap{max-width:1120px;margin:0 auto;padding-left:28px;padding-right:28px}

/* top bar, same as the homepage */
.top{position:sticky;top:0;z-index:20;background:rgba(250,249,246,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:26px;height:62px}
.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;flex:none;text-decoration:none;color:var(--ink);font:600 18px 'Source Serif 4',Georgia,serif}
.brand i{width:30px;height:30px;border-radius:7px;background:var(--purple);color:#fff;display:grid;place-items:center;font:600 16px 'Source Serif 4',serif;font-style:normal}
.top nav{display:flex;gap:18px;margin-left:auto;font-size:14.5px}
.top nav a{text-decoration:none;color:var(--muted)}
.top nav a:hover,.top nav a.on{color:var(--purple)}
.app-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 14px 8px 12px;border-radius:999px;background:var(--purple);color:#fff;text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap;box-shadow:0 6px 18px -8px rgba(75,46,131,.8);transition:background .2s,transform .2s}
.app-btn:hover{background:var(--purple-2);transform:translateY(-1px)}
.app-dot{width:8px;height:8px;border-radius:50%;background:var(--gold);animation:ping 2s infinite}
.app-new{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;background:rgba(255,255,255,.18);border-radius:999px;padding:1px 7px}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(232,207,143,.7)}70%{box-shadow:0 0 0 8px rgba(232,207,143,0)}100%{box-shadow:0 0 0 0 rgba(232,207,143,0)}}

/* page intro */
.intro{padding:56px 0 48px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff,var(--paper))}
.intro .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:48px;align-items:center}
.intro--text .wrap{grid-template-columns:minmax(0,1fr)}
.crumbs{font-size:14px;margin-bottom:14px}
.crumbs a{text-decoration:none;color:var(--muted)}
.crumbs a:hover{color:var(--purple)}
.kicker{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--purple);font-weight:600}
.intro h1{font-size:clamp(32px,4.2vw,50px);line-height:1.1;margin:10px 0 14px}
.lead{font-size:17px;margin:0 0 12px;max-width:68ch}
.intro-art img{width:100%;border-radius:16px;box-shadow:0 20px 50px -24px rgba(31,27,45,.45);background:#fff}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;background:var(--purple);color:#fff;text-decoration:none;font-weight:600;font-size:15px;transition:background .2s,transform .2s}
.btn:hover{background:var(--purple-2);transform:translateY(-1px)}
.btn--ghost{background:var(--white);color:var(--purple);border:1px solid var(--line)}
.btn--ghost:hover{background:var(--tint)}
.note{margin:18px 0 0;padding:12px 16px;border-left:3px solid var(--gold);background:var(--white);border-radius:0 10px 10px 0;font-size:15px;color:var(--muted);max-width:68ch}
.note a{font-weight:600}

/* course sections */
section.block{padding-top:48px}
.sec-head h2{font-size:30px;line-height:1.15;margin:6px 0 18px}
.lectures{display:grid;gap:16px;counter-reset:lec}
.lecture{display:grid;grid-template-columns:52px minmax(0,1fr);gap:4px 18px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.lecture>*:not(.lec-num){grid-column:2}
.lec-num{grid-row:1/span 4;width:44px;height:44px;border-radius:12px;background:var(--tint);color:var(--purple);display:grid;place-items:center;font:600 19px 'Source Serif 4',serif}
.lecture h3{margin:0;font-size:20px;line-height:1.3}
.lecture p{margin:2px 0 0;color:var(--muted);font-size:15.5px;max-width:80ch}
.videos{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin-top:14px}
.video{position:relative;display:block;border-radius:10px;overflow:hidden;background:#1d1530;aspect-ratio:16/9;text-decoration:none}
.video img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.8,.2,1),opacity .3s;opacity:.92}
.video:hover img{transform:scale(1.04);opacity:1}
.video .play{position:absolute;left:50%;top:50%;width:46px;height:46px;margin:-23px 0 0 -23px;border-radius:50%;background:rgba(255,255,255,.92);box-shadow:0 6px 16px rgba(0,0,0,.3)}
.video .play:after{content:"";position:absolute;left:18px;top:14px;border-left:14px solid var(--purple);border-top:9px solid transparent;border-bottom:9px solid transparent}
.video .vlabel{position:absolute;left:8px;bottom:8px;padding:2px 9px;border-radius:999px;background:rgba(20,16,32,.75);color:#fff;font-size:12.5px;font-weight:600}
.res{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.res a{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:var(--white);font-size:14px;text-decoration:none;color:var(--ink)}
.res a:hover{border-color:var(--purple);color:var(--purple)}
.res a b{font-weight:600;color:var(--purple)}

/* books and gallery */
.books{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.book{display:grid;grid-template-columns:150px minmax(0,1fr);gap:20px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.book img{width:150px;height:auto;align-self:start;border-radius:8px;box-shadow:0 10px 24px -14px rgba(31,27,45,.55);background:var(--tint)}
.book-ph{width:150px;aspect-ratio:2/3;border-radius:8px;box-shadow:0 10px 24px -14px rgba(31,27,45,.55);background:linear-gradient(160deg,var(--purple) 0%,#32205a 100%);color:#fff;display:flex;flex-direction:column;justify-content:space-between;padding:16px 14px;overflow:hidden}
.book-ph::before{content:"";display:block;width:34px;height:3px;border-radius:2px;background:var(--gold)}
.book-ph b{font:600 16px/1.25 'Source Serif 4',Georgia,serif}
.book-ph small{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:#d9cfee}
.book h3{margin:4px 0 6px;font-size:18px;line-height:1.3}
.book .meta{font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--purple);font-weight:600}
.book p{margin:0 0 12px;font-size:15px;color:var(--muted)}
.book .btns{margin-top:auto}
.book-body{display:flex;flex-direction:column}
.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:12px;border:1px solid var(--line);background:var(--white)}
.prose p{font-size:17px;margin:0 0 14px;max-width:68ch}
.linklist{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-top:6px}
.linklist a{display:block;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);text-decoration:none;color:var(--ink);font-weight:600;transition:border-color .2s,box-shadow .2s}
.linklist a:hover{border-color:var(--purple-2);box-shadow:0 12px 30px -18px rgba(75,46,131,.45);color:var(--purple)}

footer{margin-top:72px;border-top:1px solid var(--line);background:var(--white);color:var(--muted);font-size:14px;padding:28px 0}
footer .wrap{display:grid;grid-template-columns:1fr auto;gap:10px 30px}
footer a{color:var(--muted)}

@media(max-width:900px){
 .top nav{display:none}.app-btn{margin-left:auto}
 .intro .wrap{grid-template-columns:1fr;gap:26px}
 .books{grid-template-columns:1fr}
 .gallery{grid-template-columns:repeat(2,minmax(0,1fr))}
 footer .wrap{grid-template-columns:1fr}
}
@media(max-width:560px){
 .wrap{padding-left:16px;padding-right:16px}
 .lecture{grid-template-columns:1fr;padding:18px}
 .lec-num{grid-row:auto}
 .lecture>*:not(.lec-num){grid-column:1}
 .book{grid-template-columns:96px minmax(0,1fr);gap:14px}
 .book img{width:96px}
 .book-ph{width:96px;padding:10px 9px}.book-ph b{font-size:11.5px}.book-ph small{font-size:8.5px}.book-ph::before{width:22px}
 .gallery{grid-template-columns:1fr}
 .videos{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
 .app-new{display:none}
}

@media(max-width:1180px){.top .wrap{gap:16px}.top nav{gap:12px;font-size:13.5px}.app-new{display:none}}
@media(max-width:980px){.top nav{display:none}.app-btn{margin-left:auto}}
@media(max-width:560px){.brand{white-space:normal;flex:1 1 auto;min-width:0;font-size:16px}.top .wrap{gap:10px}}