/* fuguang-web-v0.0.2 — Cormira / 扶光心舍 */
:root{
  --bg:#f7f4ef;          /* warm paper */
  --bg-2:#efeae2;        /* deeper warm block */
  --card:#f9f6f1;
  --ink:#1b1613;         /* warm near-black */
  --ink-2:#57514b;
  --ink-3:#6f685f;
  --accent:#9c2b24;      /* brick red — primary (Science) */
  --accent-deep:#7e201a;
  --plum:#7c2433;        /* oxblood — secondary (papers, published) */
  --plum-deep:#5f1a26;
  --dark:#221a16;        /* warm near-black panel */
  --on-dark:#f7f4ef;
  --on-dark-2:rgba(247,244,239,.64);
  --on-dark-3:rgba(247,244,239,.40);
  --line:rgba(27,22,19,.13);
  --line-2:rgba(27,22,19,.07);
  --line-dark:rgba(247,244,239,.16);
  --container:1180px;
  --gutter:clamp(20px,4vw,40px);
  --radius:12px;
  --radius-sm:8px;
  --sans:"Hanken Grotesk","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --serif:"Newsreader","Noto Serif SC","Songti SC","STSong",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-snap-type:y mandatory;scroll-padding-top:64px;-webkit-text-size-adjust:100%;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.65;font-weight:400;letter-spacing:-.003em;overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
::selection{background:rgba(156,43,36,.2)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.container{width:min(100%,var(--container));margin-inline:auto;padding-inline:var(--gutter)}
html[data-lang="tw"] .zh,html[data-lang="tw"] .en{display:none}
html[data-lang="zh"] .tw,html[data-lang="zh"] .en{display:none}
html[data-lang="en"] .tw,html[data-lang="en"] .zh{display:none}

/* ---------- shared atoms ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:11px;font-size:12px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--accent);line-height:1}
.eyebrow::before{content:"";width:28px;height:2px;background:currentColor;flex:none}
.pill{display:inline-flex;align-items:center;gap:7px;width:max-content;border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12px;font-weight:500;line-height:1;color:var(--ink-2);background:transparent;white-space:nowrap}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ink-3);flex:none}
.pill.live::before{background:var(--accent)}
.tlink{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:500;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:3px;transition:color .16s,border-color .16s}
.tlink .arw{transition:transform .18s}
.tlink:hover{color:var(--accent);border-color:var(--accent)}
.tlink:hover .arw{transform:translateX(4px)}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line-2)}
.nav-row{height:64px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;width:max-content;font-weight:600;letter-spacing:.01em;font-size:15px}
.nav .brand{color:var(--accent);font-weight:700}
.nav-links{display:flex;align-items:center;gap:34px;font-size:14px;color:var(--ink-2)}
.nav-links a{position:relative;padding:22px 0;transition:color .16s}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:18px;height:1.5px;background:var(--accent);transition:right .2s ease}
.nav-links a:hover,.nav-links a[aria-current="true"]{color:var(--ink)}
.nav-links a[aria-current="true"]::after{right:0}
.nav-actions{justify-self:end;display:none;align-items:center;gap:12px}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang button{min-width:40px;border:0;background:transparent;padding:6px 11px;color:var(--ink);font-size:12px;font-weight:500;cursor:pointer;transition:color .15s,background .15s}
.lang button:hover{color:var(--accent)}
.lang button.active{background:#fff;color:var(--accent);font-weight:600}
.menu{display:none;border:0;background:transparent;width:38px;height:38px;position:relative}
.menu span,.menu::before,.menu::after{content:"";position:absolute;left:9px;width:20px;height:1.5px;background:var(--ink);transition:.2s ease}
.menu span{top:18.5px}.menu::before{top:13px}.menu::after{top:24px}
.menu[aria-expanded="true"] span{opacity:0}
.menu[aria-expanded="true"]::before{top:18.5px;transform:rotate(45deg)}
.menu[aria-expanded="true"]::after{top:18.5px;transform:rotate(-45deg)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .5s ease,transform .5s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- sections ---------- */
.section{min-height:calc(100svh - 64px);display:flex;flex-direction:column;justify-content:center;align-items:center;scroll-snap-align:start;scroll-snap-stop:always;padding-top:clamp(72px,8vh,96px);padding-bottom:clamp(36px,4.5vh,64px);background:var(--bg)}
.section--warm{background:var(--bg-2)}
.head{display:flex;flex-direction:column;align-items:center;text-align:center;margin-bottom:clamp(22px,3vh,40px)}
#team .head{margin-bottom:clamp(36px,4.5vh,52px)}
.head-bar{width:48px;height:4px;background:var(--accent);border-radius:2px;margin-top:-3px;transform:translateY(-15px)}
.title{font-family:var(--serif);font-weight:500;font-size:clamp(32px,4.5vw,54px);line-height:1.08;letter-spacing:-.022em}
.title-desc{margin-top:18px;color:var(--ink-2);font-size:17px;max-width:none;line-height:1.55;margin-inline:auto;transform:translateY(-15px);text-align:justify;text-align-last:left}

/* ---------- hero ---------- */
.hero{min-height:100vh;min-height:100svh;min-height:100dvh;display:flex;align-items:center;scroll-snap-align:start;scroll-snap-stop:always;padding-top:clamp(72px,9vh,104px);padding-bottom:clamp(40px,5vh,76px)}
.hero-grid{display:flex;flex-direction:column;align-items:center;text-align:center}
.hero-copy{display:flex;flex-direction:column;align-items:center;max-width:52rem}
.hero-bar{width:48px;height:4px;background:var(--accent);border-radius:2px;margin-top:12px;transform:translateY(-15px)}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(44px,7vw,86px);line-height:1.06;letter-spacing:-.025em;color:var(--accent);transform:translateY(-15px)}
.hero-lead{margin-top:18px;max-width:56ch;font-size:clamp(17px,1.5vw,19.5px);color:var(--ink-2);line-height:1.65;text-align:justify;text-align-last:left}
.hero-actions{display:flex;gap:30px;flex-wrap:wrap;margin-top:34px;justify-content:center}

/* ---------- projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.proj{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);padding:clamp(22px,2.6vw,32px);display:flex;flex-direction:column;transition:border-color .18s}
.proj:hover{border-color:var(--accent)}
.proj-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:8px}
.proj-eye{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);line-height:1.4}
.proj h3{font-family:var(--serif);font-weight:500;font-size:clamp(25px,2.7vw,33px);line-height:1.12;letter-spacing:-.02em;margin:12px 0 10px}
.proj p{font-size:15px;color:var(--ink-2);line-height:1.62;text-align:justify;text-align-last:left}
.proj p+p{margin-top:13px}
.proj .tags{margin-bottom:16px}
.proj-meta{margin-top:auto;padding-top:20px;border-top:1px solid var(--line-2);font-size:13.5px;color:var(--ink-2);line-height:1.55}
.proj-meta b{color:var(--ink);font-weight:600}
/* card maturity — title-only differentiation */
.proj--future h3{color:var(--ink-2)}
/* tags + stats inside project cards */
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tag{font-size:10px;font-weight:500;white-space:nowrap;padding:4px 8px;border-radius:999px;color:rgba(156,43,36,.9);background:rgba(156,43,36,.07)}

/* ---------- team + contact ---------- */
.team-wrap{display:grid;grid-template-columns:1.5fr 1fr;gap:clamp(30px,4vw,60px);align-items:stretch}
.team-body{display:flex;flex-direction:column}
.team-single{display:flex;flex-direction:column;gap:20px}
.team-single h3{font-size:12px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}
.team-single p{font-size:15px;color:var(--ink-2);line-height:1.66;text-align:justify;text-align-last:left}
.hiring{margin-top:auto;padding-top:clamp(28px,4vh,48px);font-family:var(--serif);font-size:clamp(18px,2vw,22px);color:var(--ink);line-height:1.4;letter-spacing:-.01em;max-width:70ch}
.contact-card{background:var(--dark);color:var(--on-dark);border-radius:var(--radius);padding:clamp(30px,3.4vw,44px);display:flex;flex-direction:column;justify-content:space-between;gap:26px}
.contact-fields{display:flex;flex-direction:column;gap:22px}
.cfield-label{display:block;font-size:15.5px;line-height:1.7;color:var(--on-dark-2)}
.cfield p{margin-top:2px;font-size:13.5px;line-height:1.62;color:rgba(247,244,239,.5);text-align:justify;text-align-last:left}
.mail{display:inline-flex;align-items:center;justify-content:space-between;gap:14px;width:100%;padding:16px 20px;border-radius:var(--radius);background:var(--accent);color:#f9efeb;font-size:15px;font-weight:600;transition:background .18s}
.mail:hover{background:#b1392f}
.site-foot{border-top:1px solid var(--line);margin-top:clamp(48px,6vh,84px);padding-top:24px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;color:var(--ink-3);font-size:12.5px}
.site-foot .brand{color:var(--ink-2);font-weight:600}
.site-foot strong{color:var(--ink-2);font-weight:600}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .proj-grid{grid-template-columns:1fr}
  .team-wrap{grid-template-columns:1fr;gap:36px}
  .rcard{flex-basis:calc((100% - 18px)/2)}
}
@media(max-width:820px){
  .nav-row{grid-template-columns:1fr auto}
  .nav-links{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:0;padding:8px var(--gutter) 18px;background:var(--bg);border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:13px 0}
  .nav-links a::after{display:none}
  .nav-actions{display:flex}
  .menu{display:block}
  .head{margin-bottom:clamp(36px,5vw,56px)}
  .proj-grid{grid-template-columns:1fr}
  html{scroll-snap-type:none}
  .hero,.section{scroll-snap-align:none}
  .section{min-height:0;display:block;padding-block:clamp(60px,11vw,84px)}
}
@media(max-width:600px){
  .rcard{flex-basis:85%}
  
}
@media(max-height:760px){
  html{scroll-snap-type:none}
  .hero,.section{scroll-snap-align:none}
  .hero{min-height:100vh;min-height:100svh;min-height:100dvh}
  .section{min-height:auto;display:block}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition:none!important;animation:none!important}
}

/* ---------- EN-only line-count tuning (scoped to data-lang="en"; does not affect zh/tw) ---------- */
html[data-lang="en"] .hero h1{font-size:clamp(30px,7vw,82px);letter-spacing:-.028em;line-height:1.06;text-wrap:balance}
html[data-lang="en"] .hero-copy{max-width:min(96vw,1040px)}
html[data-lang="en"] .hero-lead{max-width:94ch;font-size:clamp(14.5px,1.45vw,16.5px);line-height:1.5}
html[data-lang="en"] .proj-head{min-height:30px}
html[data-lang="en"] .proj h3{font-size:clamp(22px,2.35vw,27px);letter-spacing:-.022em;min-height:2.3em}
html[data-lang="en"] .proj-eye{font-size:10.5px;letter-spacing:.05em}