/* ============================================================
   T22 ARCHITECTS — design system
   Monochrome, editorial, architecture-led. One stylesheet, token-driven.
   ============================================================ */

/* ---------- Self-hosted fonts ---------- */
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/inter-400.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/inter-500.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/inter-600.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/inter-700.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/space-grotesk-500.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/space-grotesk-600.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/space-grotesk-700.woff2') format('woff2');}

/* ---------- Design tokens ---------- */
:root{
  /* Latin display + text; Chinese falls back to high-quality system faces */
  --font-display:'Space Grotesk','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-text:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --font-cjk:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;

  /* Ink + paper */
  --paper:#FFFFFF;
  --paper-2:#FAFAF9;
  --panel:#F4F4F2;
  --media:#E9E9E7;
  --ink:#0A0A0A;
  --ink-2:#1A1A18;
  --ink-3:#3A3A38;
  --ink-4:#5C5C58;
  --muted:#696964;          /* WCAG AA: 5.4:1 on white (secondary/CJK text) */
  --faint:#71716B;          /* WCAG AA: 4.9:1 on white (labels, numbers, meta) */
  --line:#E7E5E0;           /* decorative hairlines */
  --line-2:#D8D6D0;         /* decorative borders */
  --ui-line:#8E8E88;        /* AA non-text 3:1 — interactive control borders */
  --hair:#0A0A0A;            /* strong section-top rule */

  /* Dark band */
  --dk:#0A0A0A;
  --dk-2:#262624;
  --dk-line:#262422;
  --dk-text:#EDEDEB;
  --dk-dim:#9A9A96;
  --dk-faint:#85857F;        /* WCAG AA: ~5.2:1 on the dark band */

  --status:#157A50;          /* "Built" accent — the only colour (AA: ~5:1 on white) */

  /* Layout */
  --maxw:1680px;
  --gutter:clamp(20px,5vw,52px);
  --section:clamp(64px,9vw,128px);
  --radius:0px;

  /* Motion */
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:.6s;
}

/* ---------- Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;-webkit-tap-highlight-color:rgba(10,10,10,.06);}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-text);font-size:16px;line-height:1.6;
  font-weight:400;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
:lang(zh){font-family:var(--font-cjk);}
img,video,svg{display:block;max-width:100%;}
/* Deter casual image downloading (drag / long-press / select). Not absolute protection. */
img{-webkit-user-drag:none;-khtml-user-drag:none;-moz-user-drag:none;user-drag:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-touch-callout:none;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
::selection{background:var(--ink);color:var(--paper);}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;}
.dark :focus-visible{outline-color:#FFF;}

/* Skip link */
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--ink);color:#fff;
  padding:12px 18px;font-size:13px;letter-spacing:.04em;}
.skip:focus{left:12px;top:12px;}

/* ---------- Layout helpers ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter);}
.section{padding-block:var(--section);}
.section--t0{padding-top:0;}
.section--tight{padding-block:clamp(40px,6vw,72px);}
.bleed{width:100%;}
.rule{border-top:1px solid var(--hair);padding-top:22px;}
.hairline{border-top:1px solid var(--line);}

/* ---------- Typography ---------- */
.eyebrow{font-family:var(--font-text);font-size:11px;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);display:inline-block;}
.eyebrow--ink{color:var(--ink);}
.eyebrow--faint{color:var(--faint);}

.display{font-family:var(--font-display);font-weight:700;line-height:.98;letter-spacing:-.025em;
  text-wrap:balance;}
.h-hero{font-size:clamp(38px,6.6vw,104px);}
.h1{font-family:var(--font-display);font-weight:700;font-size:clamp(34px,5vw,72px);
  line-height:1.0;letter-spacing:-.025em;text-wrap:balance;}
.h2{font-family:var(--font-display);font-weight:700;font-size:clamp(26px,3.6vw,48px);
  line-height:1.05;letter-spacing:-.02em;text-wrap:balance;}
.h3{font-family:var(--font-display);font-weight:600;font-size:clamp(18px,1.5vw,22px);
  line-height:1.18;letter-spacing:-.01em;}
.lede{font-size:clamp(19px,2.6vw,32px);font-weight:400;line-height:1.32;letter-spacing:-.015em;
  color:var(--ink);text-wrap:pretty;}
.body-lg{font-size:clamp(15px,1.4vw,18px);line-height:1.7;color:var(--ink-2);}
.body{font-size:14.5px;line-height:1.65;color:var(--ink-3);}
.small{font-size:13px;line-height:1.55;color:var(--ink-4);}
.meta{font-size:12px;letter-spacing:.02em;color:var(--muted);}
.zh{font-family:var(--font-cjk);color:var(--muted);font-weight:500;}
.measure{max-width:58ch;}
.measure-sm{max-width:46ch;}

/* ---------- Header / nav ---------- */
.site-header{position:fixed;inset:0 0 auto 0;z-index:100;
  transition:background .35s var(--ease),border-color .35s var(--ease);
  border-bottom:1px solid transparent;}
.site-header__inner{display:flex;align-items:center;gap:24px;
  max-width:var(--maxw);margin:0 auto;padding:18px var(--gutter);}
.brand{display:flex;align-items:baseline;gap:10px;flex:0 0 auto;
  transition:color .35s var(--ease);}
.brand__mark{font-family:var(--font-display);font-weight:700;font-size:16px;letter-spacing:.01em;}
.brand__sub{font-family:var(--font-text);font-weight:600;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);align-self:center;}
.brand__zh{font-family:var(--font-cjk);font-size:13px;font-weight:500;color:var(--muted);
  transition:color .35s var(--ease);}
.nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav__link{font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-4);position:relative;padding:4px 0;transition:color .25s var(--ease);}
.nav__link::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:currentColor;transition:right .3s var(--ease);}
.nav__link:hover,.nav__link[aria-current="page"]{color:var(--ink);}
.nav__link:hover::after,.nav__link[aria-current="page"]::after{right:0;}
.lang{background:none;border:none;cursor:pointer;font-size:12px;font-weight:500;
  letter-spacing:.12em;color:var(--muted);padding:4px 0;transition:color .25s var(--ease);}
.lang:hover{color:var(--ink);}
.nav-toggle{display:none;}

/* Overlay variant (transparent over dark hero) */
.site-header--overlay{color:#fff;}
.site-header--overlay .brand,.site-header--overlay .brand__zh{color:rgba(255,255,255,.72);}
.site-header--overlay .brand__mark{color:#fff;}
.site-header--overlay .brand__sub{color:rgba(255,255,255,.62);}
.site-header--overlay .nav__link{color:rgba(255,255,255,.78);}
.site-header--overlay .nav__link:hover,.site-header--overlay .nav__link[aria-current="page"]{color:#fff;}
.site-header--overlay .lang{color:rgba(255,255,255,.7);}
.site-header--overlay .lang:hover{color:#fff;}
.site-header--overlay .nav-toggle__bar{background:#fff;}

/* Solid state (after scroll, or non-hero pages) */
.site-header.is-solid{background:rgba(255,255,255,.86);backdrop-filter:saturate(140%) blur(14px);
  border-bottom-color:var(--line);color:var(--ink);}
.site-header.is-solid .brand,.site-header.is-solid .brand__mark{color:var(--ink);}
.site-header.is-solid .brand__sub{color:var(--muted);}
.site-header.is-solid .nav__link{color:var(--ink-4);}
.site-header.is-solid .nav__link:hover,.site-header.is-solid .nav__link[aria-current="page"]{color:var(--ink);}
.site-header.is-solid .lang{color:var(--muted);}
.site-header.is-solid .nav-toggle__bar{background:var(--ink);}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:12px;font-size:13px;font-weight:500;
  letter-spacing:.04em;padding:14px 22px;border:1px solid transparent;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);}
.btn__arrow{transition:transform .3s var(--ease);}
.btn:hover .btn__arrow{transform:translateX(4px);}
.btn--solid{background:var(--ink);color:#fff;}
.btn--solid:hover{background:#262624;}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ui-line);}
.btn--ghost:hover{border-color:var(--ink);}
.btn--on-dark{background:#fff;color:var(--ink);}
.btn--on-dark:hover{background:#e7e7e3;}
.btn--ghost-dark{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.4);}
.btn--ghost-dark:hover{background:rgba(255,255,255,.14);}
.textlink{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:500;
  letter-spacing:.04em;border-bottom:1px solid currentColor;padding-bottom:3px;}
.textlink .btn__arrow{transition:transform .3s var(--ease);}
.textlink:hover .btn__arrow{transform:translateX(4px);}

/* ---------- Media (placeholder + real) ---------- */
.media{position:relative;overflow:hidden;background:var(--media);}
.media img,.media video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.media img{opacity:0;transition:opacity .5s var(--ease);z-index:1;}      /* invisible until it actually loads */
.media img.is-loaded{opacity:1;}

/* Full-bleed project imagery (edge-to-edge hero + gallery) */
.proj-hero{position:relative;left:50%;width:100vw;margin-left:-50vw;}
.proj-hero .media{height:clamp(460px,66vh,780px);}
.proj-gallery{position:relative;left:50%;width:100vw;margin-left:-50vw;margin-top:22px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px;}
.proj-gallery .media{aspect-ratio:16/10;}
@media (max-width:760px){
  .proj-hero .media{height:clamp(300px,52vh,500px);}
  .proj-gallery{grid-template-columns:1fr;}
}
.media--dark{background:#1C1B19;}
.media__ph{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:10px;padding:20px;text-align:center;}
.media__ph::before,.media__ph::after{content:"";position:absolute;width:18px;height:18px;
  border:1px solid var(--faint);opacity:.5;}
.media__ph::before{top:14px;left:14px;border-right:0;border-bottom:0;}
.media__ph::after{bottom:14px;right:14px;border-left:0;border-top:0;}
.media--dark .media__ph::before,.media--dark .media__ph::after{border-color:#5a5852;}
.media__kind{font-size:10px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--faint);}
.media__label{font-size:12px;line-height:1.5;color:var(--muted);max-width:42ch;}
.media--dark .media__kind{color:#6b6962;}
.media--dark .media__label{color:#9a988f;}
.ratio-21x9{aspect-ratio:21/9;}
.ratio-16x9{aspect-ratio:16/9;}
.ratio-4x3{aspect-ratio:4/3;}
.ratio-3x2{aspect-ratio:3/2;}
/* A successfully-loaded image (or a manually-added video) covers the placeholder underneath it */
.media:has(video) .media__ph{display:none;}

/* ---------- Reveal animation ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);will-change:opacity,transform;}
[data-reveal].is-visible{opacity:1;transform:none;}
.no-js [data-reveal],.reveal-off [data-reveal]{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none;}
}

/* ---------- Eyebrow row + section heads ---------- */
.head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;}

/* ---------- Tiles grid (what we work on / research themes) ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);}
.tile{background:var(--paper);padding:28px 26px 58px;display:flex;flex-direction:column;
  min-height:210px;position:relative;transition:background .3s var(--ease);}
.tile:hover{background:var(--paper-2);}
.tile__num{font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--faint);}
.tile__title{font-family:var(--font-display);font-size:20px;font-weight:600;line-height:1.14;
  letter-spacing:-.01em;margin:14px 0 2px;}
.tile__zh{font-family:var(--font-cjk);font-size:13.5px;color:var(--muted);margin-bottom:10px;}
.tile__body{font-size:13.5px;line-height:1.6;color:var(--ink-4);}
.tile__go{position:absolute;left:26px;bottom:22px;font-size:11px;font-weight:500;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink);transition:gap .3s;}
.tile:hover .tile__go{color:var(--ink);}

/* ---------- Work cards ---------- */
.works-grid{display:grid;gap:clamp(14px,2vw,26px);}
.works-grid--home{grid-template-columns:repeat(auto-fit,minmax(440px,1fr));}
.works-grid--all{grid-template-columns:repeat(auto-fill,minmax(420px,1fr));}
.card{display:flex;flex-direction:column;}
.card__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--media);}
.card__media .media{position:absolute;inset:0;}
.card__media img{transition:transform .8s var(--ease);}
.card:hover .card__media img{transform:scale(1.04);}
.card__media::after{content:"";position:absolute;inset:0;background:rgba(10,10,10,0);
  transition:background .4s var(--ease);}
.card:hover .card__media::after{background:rgba(10,10,10,.06);}
.card__type{position:absolute;top:14px;left:14px;font-size:10px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:#fff;mix-blend-mode:difference;z-index:2;}
.card__status{position:absolute;top:14px;right:14px;font-size:9.5px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;background:rgba(255,255,255,.92);padding:4px 8px;z-index:2;}
.card__body{padding:15px 2px 0;}
.card__row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;}
.card__name{font-size:17px;font-weight:600;letter-spacing:-.01em;color:var(--ink);}
.card:hover .card__name{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.card__zh{font-family:var(--font-cjk);font-size:12.5px;color:var(--muted);}
.card__value{font-size:13.5px;line-height:1.55;color:var(--ink-3);margin-top:9px;max-width:50ch;}
.card__tags{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap;}
.pill{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
  border:1px solid var(--line-2);border-radius:99px;padding:4px 11px;}
.role{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);}

/* ---------- Dark band ---------- */
.band{background:var(--dk);color:var(--dk-text);}
.band .eyebrow{color:var(--dk-faint);}
.band .h2{color:#fff;}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1px;
  background:var(--dk-line);border:1px solid var(--dk-line);margin-top:8px;}
.step{background:var(--dk);padding:24px 22px;min-height:170px;display:flex;flex-direction:column;}
.step__num{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--dk-faint);}
.step__title{font-family:var(--font-display);font-size:16px;font-weight:500;line-height:1.3;
  color:#fff;margin:14px 0 6px;}
.step__zh{font-family:var(--font-cjk);font-size:12.5px;line-height:1.6;color:var(--dk-dim);}

/* ---------- Facts table ---------- */
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:0 40px;}
.fact{display:grid;grid-template-columns:.8fr 1.2fr;gap:14px;padding:11px 0;border-bottom:1px solid var(--line);}
.fact__k{font-size:10.5px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--faint);}
.fact__v{font-size:13px;line-height:1.5;color:var(--ink);}
.fact__v.is-tc{color:var(--faint);}

/* ---------- Lists (outputs / trajectory / glossary) ---------- */
.row{display:grid;grid-template-columns:1fr auto;gap:14px;padding:12px 0;
  border-bottom:1px solid var(--line);align-items:baseline;}
.row__label{font-size:14px;color:var(--ink);}
.row__meta{font-size:12px;letter-spacing:.04em;color:var(--muted);white-space:nowrap;}
.timeline{display:grid;grid-template-columns:96px 1fr;gap:18px;padding:13px 0;
  border-bottom:1px solid var(--line);align-items:baseline;}
.timeline__year{font-size:12px;letter-spacing:.04em;color:var(--faint);}
.timeline__label{font-size:14.5px;line-height:1.5;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.qa{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:28px;
  padding:24px 0;border-bottom:1px solid var(--line);}
.qa__q{font-size:17px;font-weight:600;line-height:1.3;color:var(--ink);max-width:32ch;}
.qa__a{font-size:14.5px;line-height:1.65;color:var(--ink-3);max-width:58ch;}

/* ---------- Big link / CTA row ---------- */
.biglink{display:flex;align-items:center;justify-content:space-between;gap:20px;
  border-top:1px solid var(--hair);padding-top:26px;}
.biglink__text{font-family:var(--font-display);font-size:clamp(22px,3vw,38px);font-weight:500;
  letter-spacing:-.015em;color:var(--ink);max-width:26ch;}
.biglink__arrow{font-size:26px;transition:transform .3s var(--ease);}
.biglink:hover .biglink__arrow{transform:translateX(8px);}

/* ---------- Panel / answer box ---------- */
.panel{background:var(--panel);border:1px solid var(--line);padding:26px 28px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--dk);color:var(--dk-text);}
.site-footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;
  padding:64px var(--gutter) 30px;max-width:var(--maxw);margin:0 auto;}
.site-footer__head{font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dk-faint);margin-bottom:14px;}
.site-footer a{color:var(--dk-text);transition:color .2s;}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.site-footer__nav{display:flex;flex-direction:column;gap:10px;font-size:13px;}
.site-footer__bar{border-top:1px solid var(--dk-line);}
.site-footer__legal{max-width:var(--maxw);margin:0 auto;padding:2px var(--gutter) 18px;
  font-size:10.5px;line-height:1.6;color:var(--dk-faint);}
.site-footer__bar-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:18px var(--gutter);max-width:var(--maxw);margin:0 auto;font-size:11px;letter-spacing:.06em;color:var(--dk-faint);}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:7px;}
.field__label{font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);}
.field input,.field select,.field textarea{font-family:var(--font-text);font-size:16px;color:var(--ink);
  background:#fff;border:1px solid var(--ui-line);border-radius:0;padding:12px 13px;outline:none;
  transition:border-color .2s var(--ease);width:100%;min-height:44px;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--ink);}
.field textarea{resize:vertical;min-height:108px;line-height:1.55;}

/* ---------- Filters ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;}
.filter{font-size:12px;font-weight:500;letter-spacing:.06em;cursor:pointer;padding:11px 16px;min-height:44px;
  border-radius:99px;border:1px solid var(--ui-line);background:transparent;color:var(--ink-4);
  transition:all .25s var(--ease);}
.filter:hover{border-color:var(--ink);color:var(--ink);}
.filter.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ---------- Mobile nav ---------- */
@media (max-width:860px){
  .nav-toggle{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    margin-left:auto;margin-right:-8px;width:44px;height:44px;background:none;border:none;cursor:pointer;padding:0;}
  .nav-toggle__bar{width:24px;height:1.5px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s;}
  .nav{position:fixed;inset:0;flex-direction:column;align-items:flex-start;justify-content:center;
    gap:8px;background:var(--paper);padding:0 var(--gutter);margin:0;transform:translateY(-100%);
    transition:transform .5s var(--ease);z-index:99;}
  body.nav-open .nav{transform:translateY(0);}
  .nav__link{font-size:28px;font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;
    text-transform:none;color:var(--ink);padding:10px 0;}
  .nav__link::after{display:none;}
  .nav .lang{font-size:14px;margin-top:18px;color:var(--ink);}
  body.nav-open{overflow:hidden;}
  body.nav-open .nav-toggle__bar:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
  body.nav-open .nav-toggle__bar:nth-child(2){opacity:0;}
  body.nav-open .nav-toggle__bar:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
  /* keep toggle visible above the overlay */
  .site-header__inner{position:relative;z-index:100;}
  body.nav-open .site-header{background:transparent;border-color:transparent;}
  /* When the menu is open the panel is light, so force dark foreground regardless of header variant */
  body.nav-open .nav__link{color:var(--ink);}
  body.nav-open .nav .lang{color:var(--ink);}
  body.nav-open .brand__mark{color:var(--ink);}
  body.nav-open .brand,body.nav-open .brand__sub{color:var(--muted);}
  body.nav-open .nav-toggle__bar{background:var(--ink);}
  /* keep brand + close button above the open panel */
  .brand{position:relative;z-index:101;}
  .nav-toggle{position:relative;z-index:101;}
}

/* ---------- Responsive: grids → single column ---------- */
@media (max-width:760px){
  .two-col,.split,.qa,.facts .fact,.timeline,.site-footer__grid{}
  .qa{grid-template-columns:1fr;gap:10px;}
  .timeline{grid-template-columns:64px 1fr;gap:14px;}
  .site-footer__grid{grid-template-columns:1fr 1fr;gap:28px;}
  .works-grid--home,.works-grid--all{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .site-footer__grid{grid-template-columns:1fr;}
}

/* Generic two-column / split utilities used by pages */
.split{display:grid;gap:clamp(36px,5vw,56px);align-items:start;}
.split--7-5{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);}
.split--6-6{grid-template-columns:1fr 1fr;}
.split--5-7{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);}
.split--4-8{grid-template-columns:minmax(0,.4fr) minmax(0,1fr);}
@media (max-width:860px){.split--7-5,.split--6-6,.split--5-7,.split--4-8{grid-template-columns:1fr;}}

.grid-auto{display:grid;gap:clamp(24px,3vw,36px);}
.cols-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));}
.cols-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}
.gap-thin{gap:14px;}
.mt-s{margin-top:14px;}.mt-m{margin-top:24px;}.mt-l{margin-top:40px;}

/* Team: exactly three across on desktop, single column on phones */
.team{display:grid;gap:clamp(24px,3vw,40px);grid-template-columns:repeat(3,1fr);}
@media (max-width:760px){.team{grid-template-columns:1fr;max-width:420px;}}

/* ---------- Hero (home) ---------- */
.hero{position:relative;height:100svh;min-height:600px;display:flex;align-items:flex-end;overflow:hidden;}
.hero__media{position:absolute;inset:0;}
.hero__scrim{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top,rgba(10,10,10,.68),rgba(10,10,10,.10) 46%,rgba(10,10,10,.36));}
.hero__inner{position:relative;width:100%;padding-bottom:clamp(40px,7vh,76px);}
.hero__title{color:#fff;max-width:19ch;margin-top:18px;}
.hero__zh{color:rgba(255,255,255,.9);font-family:var(--font-cjk);font-weight:500;
  font-size:clamp(15px,2vw,22px);line-height:1.5;margin-top:16px;max-width:36ch;}
.hero__cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:clamp(24px,4vh,34px);}
.hero__scroll{position:absolute;left:50%;transform:translateX(-50%);bottom:26px;
  color:rgba(255,255,255,.66);font-size:13px;letter-spacing:.2em;text-transform:uppercase;
  display:inline-flex;flex-direction:column;align-items:center;gap:8px;}
.hero__scroll i{width:1px;height:34px;background:linear-gradient(rgba(255,255,255,.7),transparent);
  animation:drip 2.2s var(--ease) infinite;}
@keyframes drip{0%{transform:scaleY(.2);transform-origin:top;opacity:0}40%{opacity:1}100%{transform:scaleY(1);transform-origin:top;opacity:0}}
@media (prefers-reduced-motion:reduce){.hero__scroll i{animation:none;}}
@media (max-width:560px){.hero__scroll{display:none;}}

/* Hero placeholder hint sits at the top (out of the headline's way) until real media is added */
.hero .media__ph{justify-content:flex-start;padding-top:clamp(96px,14vh,150px);}
.hero .media__label{max-width:34ch;}

/* ---------- Statement lede ---------- */
.statement{border-bottom:1px solid var(--line);}
.statement .lede{max-width:34ch;}

/* ---------- Project page figure ---------- */
.proj-fig{margin:0;}

/* First section on inner pages clears the fixed header */
.first{padding-top:clamp(104px,13vh,156px);}
html{scroll-padding-top:90px;}

/* ============================================================
   Mobile UX polish — thumb-friendly, legible, no iOS zoom
   ============================================================ */

/* Contact form: two columns on tablet/desktop, single column on phones */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
@media (max-width:560px){ .form-grid{grid-template-columns:1fr;} }

/* Touch feedback (devices without hover get a press state instead) */
@media (hover:none){
  .btn:active{transform:translateY(1px);}
  .filter:active,.tile:active{background:var(--paper-2);}
  .card:active .card__name{text-decoration:underline;text-underline-offset:3px;}
  .biglink:active .biglink__arrow,.textlink:active .btn__arrow{transform:translateX(6px);}
}

/* Phones: larger reading sizes + thumb-friendly actions */
@media (max-width:560px){
  .body{font-size:15px;}
  .body-lg{font-size:16px;}
  .card__value,.tile__body{font-size:14.5px;}
  .fact__v{font-size:14px;}
  .qa__a{font-size:15px;}
  .small{font-size:13.5px;}
  /* hero actions become full-width, easy-to-tap stacked buttons */
  .hero__cta{flex-direction:column;align-items:stretch;gap:12px;}
  .hero__cta .btn{width:100%;justify-content:center;padding-block:16px;}
  /* roomier footer */
  .site-footer__grid{padding-top:48px;}
  .site-footer__nav{gap:4px;}
  .site-footer__nav a{padding:9px 0;display:inline-block;}
  .site-footer__bar-inner{flex-direction:column;align-items:flex-start;gap:8px;}
}

/* Mobile menu: safe spacing, scrollable on short screens, generous tap rows */
@media (max-width:860px){
  .nav{justify-content:center;gap:4px;padding:96px var(--gutter) 48px;overflow-y:auto;-webkit-overflow-scrolling:touch;}
  .nav__link{padding:13px 0;}
}