/* =========================================================
   Ruoyu Chen — Academic site
   Shared design system
   Palette: warm paper + deep navy ink + restrained sienna
   Type: Spectral (EN serif) + Inter (sans) + system CJK
   ========================================================= */

:root{
  --paper:#FBFAF7;
  --sand:#F2EFE8;
  --sand-2:#ECE8DF;
  --ink:#1B2435;
  --ink-2:#454E60;
  --ink-3:#6B7280;
  --muted:#9AA0A8;
  --accent:#B05A34;
  --accent-2:#974A29;
  --accent-tint:rgba(176,90,52,0.08);
  --accent-tint-2:rgba(176,90,52,0.16);
  --line:#E5E1D8;
  --line-2:#D9D4C8;
  --navy:#16203A;
  --navy-2:#111A30;
  --on-dark:#F4F2EC;
  --on-dark-soft:rgba(244,242,236,0.62);
  --on-dark-faint:rgba(244,242,236,0.34);
  --serif:'Spectral',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --cjk:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',var(--sans);
  --maxw:1180px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(20,28,48,0.04);
  --shadow:0 14px 40px rgba(20,28,48,0.10);
  --ease:cubic-bezier(0.22,1,0.36,1);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
::selection{background:rgba(176,90,52,0.16);color:var(--ink);}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-track{background:var(--paper);}
::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:4px;}
::-webkit-scrollbar-thumb:hover{background:var(--accent);}

/* ---------- bilingual show / hide ---------- */
html[lang="en"] [data-lang="zh"]{display:none !important;}
html[lang="zh"] [data-lang="en"]{display:none !important;}
[data-lang="zh"]{font-family:var(--cjk);}
html[lang="zh"] body{font-family:var(--cjk);}
html[lang="zh"]{--serif:var(--cjk);}

/* ---------- typography helpers ---------- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.18;color:var(--ink);letter-spacing:-0.01em;}
html[lang="zh"] h1,html[lang="zh"] h2,html[lang="zh"] h3,html[lang="zh"] h4{font-family:var(--cjk);letter-spacing:0;font-weight:700;}
p{color:var(--ink-2);}
strong{color:var(--ink);font-weight:650;}
.serif{font-family:var(--serif);}
html[lang="zh"] .serif{font-family:var(--cjk);}

.container{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.bg-paper{background:var(--paper);}
.bg-sand{background:var(--sand);}
.bg-navy{background:var(--navy);color:var(--on-dark);}
.bg-navy h1,.bg-navy h2,.bg-navy h3,.bg-navy h4{color:var(--on-dark);}
.bg-navy p{color:var(--on-dark-soft);}
.divider-top{border-top:1px solid var(--line);}

/* ---------- eyebrow + section header ---------- */
.eyebrow{
  font-family:var(--sans);
  font-size:12px;font-weight:600;letter-spacing:0.22em;text-transform:uppercase;
  color:var(--accent);display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;
}
html[lang="zh"] .eyebrow{font-family:var(--cjk);letter-spacing:0.16em;}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--accent);display:inline-block;}
.bg-navy .eyebrow{color:#D98C63;}
.bg-navy .eyebrow::before{background:#D98C63;}
.section-title{font-size:clamp(30px,4vw,46px);margin-bottom:18px;}
.section-sub{font-size:clamp(16px,1.4vw,19px);color:var(--ink-3);max-width:680px;line-height:1.65;}
.bg-navy .section-sub{color:var(--on-dark-soft);}
.section-head{margin-bottom:54px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--sans);font-size:14.5px;font-weight:550;letter-spacing:0.01em;
  padding:13px 26px;border-radius:999px;cursor:pointer;border:1.5px solid transparent;
  transition:all .35s var(--ease);white-space:nowrap;
}
html[lang="zh"] .btn{font-family:var(--cjk);}
.btn svg{width:16px;height:16px;}
.btn-primary{background:var(--ink);color:var(--paper);}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px);box-shadow:0 10px 26px rgba(176,90,52,0.26);}
.btn-outline{border-color:var(--line-2);color:var(--ink);}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-2);transform:translateY(-2px);box-shadow:0 10px 26px rgba(176,90,52,0.30);}
.bg-navy .btn-outline{border-color:rgba(244,242,236,0.26);color:var(--on-dark);}
.bg-navy .btn-outline:hover{border-color:#D98C63;color:#D98C63;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;}

/* link with arrow */
.arrow-link{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-weight:550;font-size:15px;transition:gap .3s var(--ease);}
.arrow-link svg{width:16px;height:16px;transition:transform .3s var(--ease);}
.arrow-link:hover{gap:12px;}
.arrow-link:hover svg{transform:translateX(3px);}

/* =========================================================
   NAVBAR
   ========================================================= */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s,border-color .4s,box-shadow .4s;border-bottom:1px solid transparent;}
.nav.scrolled{background:rgba(251,250,247,0.86);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 28px;height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{width:38px;height:38px;border-radius:9px;background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:600;font-size:17px;letter-spacing:0.02em;flex-shrink:0;transition:background .35s;}
.brand:hover .brand-mark{background:var(--accent);}
.brand-text{display:flex;flex-direction:column;justify-content:center;}
.brand-name{display:block;font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink);line-height:1.15;}
html[lang="zh"] .brand-name{font-family:var(--cjk);font-weight:700;}
.brand-sub{display:block;font-size:11px;color:var(--ink-3);letter-spacing:0.04em;}

.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  font-size:13.5px;font-weight:500;color:var(--ink-2);padding:8px 14px;border-radius:8px;
  transition:color .25s,background .25s;position:relative;
}
html[lang="zh"] .nav-links a{font-family:var(--cjk);}
.nav-links a:hover{color:var(--accent);}
.nav-links a.active{color:var(--ink);}
.nav-links a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--accent);border-radius:2px;}

.nav-right{display:flex;align-items:center;gap:14px;}
.lang-toggle{display:inline-flex;border:1px solid var(--line-2);border-radius:999px;overflow:hidden;background:var(--paper);}
.lang-toggle button{
  border:none;background:transparent;cursor:pointer;font-family:var(--sans);
  font-size:12.5px;font-weight:600;letter-spacing:0.03em;color:var(--ink-3);padding:6px 13px;transition:all .25s;
}
.lang-toggle button.on{background:var(--ink);color:var(--paper);}
.lang-toggle button:not(.on):hover{color:var(--accent);}

.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.nav-burger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s;}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-burger.open span:nth-child(2){opacity:0;}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-mobile{display:none;flex-direction:column;background:rgba(251,250,247,0.98);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:8px 28px 20px;}
.nav-mobile a{padding:13px 4px;font-size:15px;font-weight:500;color:var(--ink-2);border-bottom:1px solid var(--line);}
html[lang="zh"] .nav-mobile a{font-family:var(--cjk);}
.nav-mobile a:last-child{border-bottom:none;}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;padding-top:140px;padding-bottom:88px;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.25fr 0.85fr;gap:60px;align-items:center;}
.hero-kicker{margin-bottom:22px;}
.hero h1{font-size:clamp(42px,6vw,72px);line-height:1.04;margin-bottom:22px;letter-spacing:-0.02em;}
.hero-role{font-size:clamp(17px,1.6vw,20px);color:var(--ink-2);font-weight:500;margin-bottom:8px;}
.hero-affil{font-size:15px;color:var(--accent);font-weight:550;margin-bottom:26px;}
.hero-lead{font-size:clamp(16px,1.5vw,18.5px);color:var(--ink-2);line-height:1.72;max-width:560px;margin-bottom:30px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:34px;}

.portrait-wrap{position:relative;justify-self:end;}
.portrait{width:340px;max-width:100%;aspect-ratio:4/5;border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--sand);}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:center 18%;}
.portrait-rule{position:absolute;left:-18px;bottom:34px;width:7px;height:120px;background:var(--accent);border-radius:4px;}
.portrait-badge{position:absolute;right:-16px;top:26px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow-sm);}
.portrait-badge .pb-num{font-family:var(--serif);font-size:22px;color:var(--accent);line-height:1;}
.portrait-badge .pb-label{font-size:11px;color:var(--ink-3);letter-spacing:0.04em;margin-top:3px;}
html[lang="zh"] .portrait-badge .pb-num{font-family:var(--cjk);font-weight:700;}

/* =========================================================
   TAGS / BADGES / PILLS
   ========================================================= */
.tag{
  display:inline-block;padding:7px 15px;border-radius:999px;font-size:13px;font-weight:500;
  background:var(--sand);color:var(--ink-2);border:1px solid var(--line);transition:all .3s;
}
html[lang="zh"] .tag{font-family:var(--cjk);}
a.tag:hover,.tag.hoverable:hover{background:var(--accent-tint);border-color:var(--accent-tint-2);color:var(--accent);}
.bg-navy .tag{background:rgba(244,242,236,0.06);border-color:rgba(244,242,236,0.14);color:var(--on-dark-soft);}
.tag-group{display:flex;flex-wrap:wrap;gap:9px;}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:6px;font-size:11.5px;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;background:var(--accent-tint);color:var(--accent);}
.badge-tier{background:var(--ink);color:var(--paper);}
.badge-soft{background:var(--sand-2);color:var(--ink-2);}

/* =========================================================
   GENERIC CARD + GRIDS
   ========================================================= */
.grid{display:grid;gap:22px;}
.eval-split{display:grid;grid-template-columns:0.8fr 1.2fr;gap:48px;align-items:center;}
@media (max-width:760px){.eval-split{grid-template-columns:1fr;gap:30px;}}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.bg-sand .card{background:var(--paper);}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-2);}
.card-icon{width:46px;height:46px;border-radius:11px;background:var(--accent-tint);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:20px;}
.card-icon svg{width:22px;height:22px;}
.card h3{font-size:21px;margin-bottom:10px;}
.card p{font-size:15px;line-height:1.66;color:var(--ink-3);}
.card-num{font-family:var(--serif);font-size:14px;color:var(--accent);font-weight:600;}

/* feature card on dark */
.bg-navy .card{background:rgba(255,255,255,0.035);border-color:rgba(244,242,236,0.12);}
.bg-navy .card:hover{background:rgba(176,90,52,0.10);border-color:rgba(217,140,99,0.32);box-shadow:none;}
.bg-navy .card p{color:var(--on-dark-soft);}
.bg-navy .card-icon{background:rgba(244,242,236,0.06);color:#D98C63;}

/* =========================================================
   STATS / HIGHLIGHTS
   ========================================================= */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.stat{background:var(--paper);padding:30px 26px;text-align:left;}
.stat-num{font-family:var(--serif);font-size:clamp(30px,3.4vw,40px);color:var(--accent);line-height:1;letter-spacing:-0.01em;}
html[lang="zh"] .stat-num{font-family:var(--cjk);font-weight:700;}
.stat-label{font-size:13.5px;color:var(--ink-3);margin-top:9px;line-height:1.45;}
html[lang="zh"] .stat-label{font-family:var(--cjk);}

/* =========================================================
   PUBLICATIONS
   ========================================================= */
.pub-list{display:flex;flex-direction:column;}
.pub{display:flex;gap:24px;padding:26px 4px;border-top:1px solid var(--line);transition:background .35s;}
.pub:last-child{border-bottom:1px solid var(--line);}
.pub:hover{background:rgba(176,90,52,0.025);}
.pub-num{font-family:var(--serif);font-size:18px;color:var(--muted);flex-shrink:0;width:30px;padding-top:3px;}
.pub-body{flex-grow:1;}
.pub-title{font-family:var(--serif);font-size:20px;font-weight:600;line-height:1.32;margin-bottom:9px;color:var(--ink);}
html[lang="zh"] .pub-title{font-family:var(--cjk);font-weight:700;}
.pub-title a{color:inherit;text-decoration:none;transition:color .25s;}
.pub-title a:hover{color:var(--accent);}
.pub-ext{display:inline-flex;vertical-align:middle;margin-left:6px;opacity:.38;transition:opacity .25s;}
.pub-ext svg{width:13px;height:13px;}
.pub-title a:hover .pub-ext{opacity:1;}
.pub-authors{font-size:14.5px;color:var(--ink-3);margin-bottom:12px;}
.pub-authors strong{color:var(--ink);}
.pub-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.pub-journal{font-family:var(--serif);font-style:italic;font-size:15.5px;color:var(--accent);font-weight:500;}
html[lang="zh"] .pub-journal{font-family:var(--cjk);font-style:normal;}
.pub-dot{width:3px;height:3px;border-radius:50%;background:var(--line-2);}
.pub-year{font-size:14px;color:var(--ink-3);}
.pub-tiers{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px;}

/* =========================================================
   TIMELINE (education / appointments)
   ========================================================= */
.timeline{position:relative;}
.tl-item{display:flex;gap:22px;}
.tl-rail{display:flex;flex-direction:column;align-items:center;flex-shrink:0;}
.tl-dot{width:13px;height:13px;border-radius:50%;background:var(--accent);margin-top:6px;box-shadow:0 0 0 4px var(--accent-tint);}
.tl-line{width:2px;flex-grow:1;background:var(--line);margin:6px 0 0;}
.tl-body{padding-bottom:34px;}
.tl-item:last-child .tl-body{padding-bottom:0;}
.tl-title{font-family:var(--serif);font-size:19px;font-weight:600;color:var(--ink);line-height:1.3;}
html[lang="zh"] .tl-title{font-family:var(--cjk);font-weight:700;}
.tl-org{font-size:14.5px;color:var(--accent);font-weight:550;margin-top:3px;}
.tl-meta{font-size:13px;color:var(--ink-3);margin-top:4px;}
.tl-note{font-size:14px;color:var(--ink-3);margin-top:8px;line-height:1.6;}

/* =========================================================
   LIST BLOCKS (awards / service / grants)
   ========================================================= */
.list-block{}
.list-block h3{font-size:13px;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:var(--ink);margin-bottom:20px;font-family:var(--sans);}
html[lang="zh"] .list-block h3{font-family:var(--cjk);letter-spacing:0.06em;}
.li-row{display:flex;gap:14px;padding:15px 0;border-top:1px solid var(--line);}
.li-row:first-of-type{border-top:none;}
.li-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.55;margin-top:9px;flex-shrink:0;}
.li-main{font-size:15.5px;font-weight:550;color:var(--ink);line-height:1.45;}
html[lang="zh"] .li-main{font-family:var(--cjk);}
.li-sub{font-size:13.5px;color:var(--ink-3);margin-top:3px;}
html[lang="zh"] .li-sub{font-family:var(--cjk);}

/* =========================================================
   COURSE ROWS
   ========================================================= */
.course{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:22px 24px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper);transition:all .35s var(--ease);}
.course:hover{transform:translateX(4px);border-color:var(--accent-tint-2);background:rgba(176,90,52,0.025);}
.course-left{display:flex;align-items:baseline;gap:20px;min-width:0;}
.course-code{font-family:var(--serif);font-size:15px;font-weight:600;color:var(--accent);flex-shrink:0;min-width:96px;}
html[lang="zh"] .course-code{font-family:var(--cjk);}
.course-title{font-size:17px;font-weight:600;color:var(--ink);}
html[lang="zh"] .course-title{font-family:var(--cjk);}
.course-note{font-size:13.5px;color:var(--ink-3);margin-top:3px;}
.course-term{font-size:13px;color:var(--ink-3);white-space:nowrap;}

/* =========================================================
   PULLQUOTE / PHILOSOPHY PILLARS
   ========================================================= */
.pullquote{font-family:var(--serif);font-size:clamp(22px,2.6vw,30px);line-height:1.42;color:var(--ink);font-weight:500;padding-left:26px;border-left:3px solid var(--accent);max-width:860px;}
html[lang="zh"] .pullquote{font-family:var(--cjk);}
.bg-navy .pullquote{color:var(--on-dark);border-left-color:#D98C63;}
.pillar h3{display:flex;align-items:center;gap:12px;font-size:20px;margin-bottom:10px;}
.pillar .pill-no{font-family:var(--serif);font-size:15px;color:var(--accent);border:1.5px solid var(--accent-tint-2);border-radius:8px;width:34px;height:34px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* =========================================================
   PAGE HEADER (sub pages)
   ========================================================= */
.page-head{padding-top:130px;padding-bottom:30px;}
.crumbs{font-size:13px;color:var(--ink-3);margin-bottom:18px;display:flex;align-items:center;gap:8px;}
.crumbs a:hover{color:var(--accent);}
.crumbs svg{width:13px;height:13px;opacity:.6;}
.page-title{font-size:clamp(34px,5vw,56px);line-height:1.05;letter-spacing:-0.02em;margin-bottom:18px;}
.page-intro{font-size:clamp(16px,1.5vw,19px);color:var(--ink-2);max-width:720px;line-height:1.7;}

/* prose */
.prose p{font-size:16.5px;line-height:1.78;color:var(--ink-2);margin-bottom:18px;}
.prose p:last-child{margin-bottom:0;}
.prose strong{color:var(--ink);}

/* =========================================================
   FOOTER
   ========================================================= */
.footer{background:var(--navy-2);color:var(--on-dark);padding:72px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:48px;}
.footer h4{font-family:var(--serif);font-size:22px;color:var(--on-dark);margin-bottom:12px;}
html[lang="zh"] .footer h4{font-family:var(--cjk);}
.footer .f-lead{font-size:14.5px;color:var(--on-dark-soft);line-height:1.7;max-width:340px;}
.footer-col h5{font-size:12px;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:var(--on-dark-faint);margin-bottom:16px;font-family:var(--sans);}
html[lang="zh"] .footer-col h5{font-family:var(--cjk);letter-spacing:0.06em;}
.footer-col a,.footer-col p{display:block;font-size:14.5px;color:var(--on-dark-soft);margin-bottom:11px;transition:color .25s;line-height:1.5;}
.footer-col a:hover{color:#D98C63;}
.footer-bottom{border-top:1px solid rgba(244,242,236,0.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;}
.footer-bottom p{font-size:12.5px;color:var(--on-dark-faint);}
html[lang="zh"] .footer-bottom p,html[lang="zh"] .footer-col a,html[lang="zh"] .footer-col p,html[lang="zh"] .footer .f-lead{font-family:var(--cjk);}

/* =========================================================
   REVEAL ANIMATION
   ========================================================= */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.08s;}
.reveal.d2{transition-delay:.16s;}
.reveal.d3{transition-delay:.24s;}
.reveal.d4{transition-delay:.32s;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .portrait-wrap{justify-self:start;order:-1;}
  .portrait{width:280px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:820px){
  .nav-links{display:none;}
  .nav-burger{display:flex;}
  .nav-mobile.open{display:flex;}
  body.menu-open{overflow:hidden;}
}
@media (max-width:680px){
  body{font-size:16px;}
  .section{padding:64px 0;}
  .container{padding:0 20px;}
  .nav-inner{padding:0 20px;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .stats{gr