/* Ye Jiang — portfolio */
:root{
  --bg:#fbfaf7; --card:#ffffff; --soft:#f2f0ea; --ink:#18181b; --muted:#5f5f68; --faint:#8b8b93;
  --line:#e6e3dc; --line-2:#d6d2c8; --accent:#b4441f;
  --shadow:0 1px 2px rgba(24,24,27,.05),0 18px 40px -22px rgba(24,24,27,.28);
  --serif:"Newsreader","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --wide:1080px; --narrow:740px; --r:14px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){ --bg:#121213; --card:#1a1a1c; --soft:#202023; --ink:#efeee9; --muted:#a4a4ac; --faint:#7c7c84; --line:#29292d; --line-2:#36363b; --accent:#f08a62; --shadow:0 1px 2px rgba(0,0,0,.4),0 20px 44px -24px rgba(0,0,0,.8); }
}
:root[data-theme="dark"]{ --bg:#121213; --card:#1a1a1c; --soft:#202023; --ink:#efeee9; --muted:#a4a4ac; --faint:#7c7c84; --line:#29292d; --line-2:#36363b; --accent:#f08a62; --shadow:0 1px 2px rgba(0,0,0,.4),0 20px 44px -24px rgba(0,0,0,.8); }

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16.5px/1.65 var(--sans);-webkit-font-smoothing:antialiased;font-feature-settings:"cv11"}
a{color:inherit;text-decoration:none}
p a,figcaption a,.link{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
p a:hover,.link:hover{text-decoration-thickness:2px}
img,video{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--wide);margin:0 auto;padding:0 28px}
.narrow{max-width:var(--narrow)}
@media(max-width:560px){.wrap{padding:0 18px}body{font-size:16px}}

/* header */
header.site .wrap{display:flex;align-items:center;gap:24px;height:68px}
header.site .name{font:600 17px/1 var(--sans);letter-spacing:-.01em}
header.site nav{margin-left:auto;display:flex;align-items:center;gap:26px;font-size:15px}
header.site nav a{color:var(--muted)}
header.site nav a:hover{color:var(--ink)}
@media(max-width:480px){header.site nav{gap:16px;font-size:14.5px}}
.theme-toggle{width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:999px;background:transparent;color:var(--muted);cursor:pointer;padding:0;flex:0 0 32px}
.theme-toggle:hover{color:var(--ink);border-color:var(--ink)}
.theme-toggle svg{width:15px;height:15px}
.theme-toggle .i-sun,.theme-toggle .i-moon,.theme-toggle .i-auto{display:none}
:root[data-theme-mode="light"] .theme-toggle .i-sun{display:block}
:root[data-theme-mode="dark"] .theme-toggle .i-moon{display:block}
:root:not([data-theme-mode="light"]):not([data-theme-mode="dark"]) .theme-toggle .i-auto{display:block}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1fr);gap:22px 64px;padding:56px 0 24px;align-items:end}
@media(min-width:940px){.hero{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);padding:88px 0 40px}}
.hero > *{min-width:0}
.hero h1{font:400 clamp(52px,8vw,92px)/.95 var(--serif);letter-spacing:-.02em;margin:0}
@media(min-width:940px){.hero h1{padding-bottom:8px}}
.hero .lead .actions{margin-bottom:4px}
.hero .media-card{grid-column:1/-1;margin-top:22px}
.hero .intro{font-size:clamp(17px,1.7vw,19.5px);line-height:1.6;color:var(--muted);margin:0 0 20px;max-width:34em}
.hero .intro strong{color:var(--ink);font-weight:500}
.hero .facts{color:var(--faint);font-size:14.5px;margin:0 0 30px}
.hero .facts span+span::before{content:"·";margin:0 9px;color:var(--line-2)}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;font:500 15px/1 var(--sans);padding:13px 20px;border-radius:999px;border:1px solid var(--line-2);color:var(--ink);background:transparent;transition:background .15s,border-color .15s,color .15s}
.btn:hover{border-color:var(--ink)}
.btn.solid{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.btn.solid:hover{background:transparent;color:var(--ink)}
.actions .plain{color:var(--muted);font-size:15px;padding:0 6px}
.actions .plain:hover{color:var(--ink)}
.media-card{margin:0}
.media-card .frame{border-radius:18px;overflow:hidden;box-shadow:var(--shadow);background:#000}
.media-card video{width:100%;aspect-ratio:1200/484;object-fit:cover}
.media-card figcaption{color:var(--faint);font-size:14px;margin-top:12px}

/* sections */
section.part{padding:72px 0 0}
.part-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:30px}
.part-head h2{font:400 clamp(30px,3.6vw,40px)/1.1 var(--serif);letter-spacing:-.015em;margin:0}
.part-head p{margin:0;color:var(--faint);font-size:15px}
@media(max-width:560px){.part-head p{display:none}}

.cards{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:760px){.cards{grid-template-columns:1fr 1fr;gap:32px}}
.card{display:block}
.card .img{border-radius:var(--r);overflow:hidden;background:var(--soft);aspect-ratio:4/3;box-shadow:var(--shadow)}
.card .img img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.card:hover .img img{transform:scale(1.035)}
.card .meta{color:var(--faint);font-size:14px;margin:18px 0 6px}
.card h3{font:400 28px/1.15 var(--serif);letter-spacing:-.01em;margin:0 0 8px}
.card:hover h3{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.card p{color:var(--muted);margin:0;max-width:34em}

.roles{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:860px){.roles{grid-template-columns:1fr 1fr;gap:32px}}
.role{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px 28px 24px}
.role .meta{color:var(--faint);font-size:14px;margin:0 0 8px}
.role h3{font:400 25px/1.2 var(--serif);letter-spacing:-.01em;margin:0 0 14px}
.role p{color:var(--muted);margin:0 0 14px}
.role .note{font-size:14px;color:var(--faint);margin:0;padding-top:14px;border-top:1px solid var(--line)}

.contact{padding:80px 0 0}
.contact .inner{border-top:1px solid var(--line);padding-top:40px;display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:860px){.contact .inner{grid-template-columns:1fr 1.2fr;align-items:start}}
.contact h2{font:400 clamp(30px,3.6vw,40px)/1.1 var(--serif);margin:0}
.contact p{color:var(--muted);margin:0 0 10px}
.contact .mail{font:400 clamp(24px,3vw,34px)/1.2 var(--serif);color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:1px;text-underline-offset:6px}
.contact .mail:hover{color:var(--accent)}
.contact .more{margin-top:10px;color:var(--muted);font-size:15px}
.contact .more a{color:var(--muted);margin-right:18px}
.contact .more a:hover{color:var(--ink)}

footer.site{margin-top:72px;padding:24px 0 44px;border-top:1px solid var(--line);color:var(--faint);font-size:14px;display:flex;flex-wrap:wrap;gap:8px 20px}
footer.site a{color:var(--muted)}
footer.site a:hover{color:var(--ink)}
footer.site .r{margin-left:auto;display:flex;gap:20px}

/* project pages */
.phead{padding:44px 0 8px}
.phead .back{color:var(--muted);font-size:15px}
.phead .back:hover{color:var(--ink)}
.phead h1{font:400 clamp(40px,6vw,64px)/1.02 var(--serif);letter-spacing:-.02em;margin:26px 0 14px}
.phead .meta{color:var(--faint);font-size:15px;margin:0}
.lede{font-size:clamp(17.5px,1.8vw,20px);line-height:1.6;color:var(--ink);margin:26px 0 12px}
.tools{color:var(--faint);font-size:14.5px;margin:0 0 30px}
.wide-media{margin:10px 0 8px}
.wide-media .frame{border-radius:18px;overflow:hidden;box-shadow:var(--shadow);background:#000}
.wide-media figcaption,figure figcaption{color:var(--faint);font-size:14px;margin-top:12px}
.article h2{font:400 clamp(26px,3vw,32px)/1.15 var(--serif);letter-spacing:-.01em;margin:56px 0 14px}
.article p{margin:0 0 16px}
.article figure{margin:24px 0}
.article figure .frame{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--card)}
.two{display:grid;grid-template-columns:1fr;gap:20px;margin:24px 0}
@media(min-width:640px){.two{grid-template-columns:1fr 1fr}}
.two figure{margin:0!important}
.two img{aspect-ratio:4/3;object-fit:cover;width:100%}
.overview{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 26px;margin:34px 0 10px}
.overview dl{margin:0;display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:640px){.overview dl{grid-template-columns:150px 1fr;gap:12px 20px}}
.overview dt{color:var(--faint);font-size:14.5px}
.overview dd{margin:0;color:var(--ink)}
.video{position:relative;width:100%;aspect-ratio:16/9;background:#000}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
img.yt{aspect-ratio:16/9;object-fit:cover;width:100%}
figure.narrow{max-width:540px}
.bom{overflow-x:auto;margin:18px 0 8px;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.bom table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
.bom th{text-align:left;font-weight:500;color:var(--faint);font-size:13.5px;padding:14px 18px;border-bottom:1px solid var(--line-2)}
.bom td{padding:8px 18px;border-bottom:1px solid var(--line)}
.bom td:nth-child(2),.bom td:nth-child(4),.bom th:nth-child(2),.bom th:nth-child(4){text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.bom tr.grp td{font-family:var(--serif);font-size:17px;color:var(--ink);padding-top:20px;border-bottom:1px solid var(--line-2)}
.bom tr.total td{font-weight:600;border-top:1px solid var(--ink);border-bottom:0;padding:14px 18px}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:72px 0 0}
.pager a{border-top:1px solid var(--line-2);padding-top:16px;display:block}
.pager small{display:block;color:var(--faint);font-size:14px;margin-bottom:4px}
.pager b{font:400 22px/1.2 var(--serif)}
.pager a:hover b{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.pager .next{text-align:right}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}