/* Typeface: Hanken Grotesk, SIL Open Font License, self-hosted. */
@font-face{font-family:"Hanken Grotesk";font-style:normal;font-weight:300 600;font-display:swap;src:url(fonts/hanken-grotesk.woff2) format("woff2")}

:root{
  --paper:#f3f1ec;
  --ink:#1f201c;
  --muted:#6b6c64;
  --line:#d8d5cc;
  --accent:#8b442e;
  --sans:"Hanken Grotesk","Helvetica Neue",Helvetica,Arial,sans-serif;
  --gutter:clamp(16px,4vw,56px);
  --col-gap:clamp(12px,2vw,32px);
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;font-feature-settings:"kern","liga";-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,p,figure,ol,dl,dd{margin:0}
/* Keep the last word of a sentence from sitting alone on a line */
p,dd,figcaption{text-wrap:pretty}
.lede,.label,.intro-text{text-wrap:balance}
ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0;padding:0}
::selection{background:var(--ink);color:var(--paper)}
:focus-visible{outline:1px solid var(--accent);outline-offset:5px}

.skip{position:absolute;left:var(--gutter);top:-60px;z-index:10;background:var(--ink);color:var(--paper);padding:8px 14px;font-size:13px}
.skip:focus{top:12px}

.label{font-size:13px;color:var(--muted);letter-spacing:.01em}
.lede{font-weight:400;font-size:clamp(20px,1.7vw,25px);line-height:1.38;letter-spacing:-.012em;color:var(--ink)}
.note{font-size:13px;color:var(--muted)}

/* Underlines that draw in rather than sit as boxes */
.site-header nav a,.site-footer a,#viewer-enquiry,.contact-link{background:linear-gradient(currentColor,currentColor) 0 100%/0 1px no-repeat;transition:background-size .5s var(--ease)}
.site-header nav a:hover,.site-footer a:hover,#viewer-enquiry:hover,.contact-link:hover{background-size:100% 1px}

/* Header */
.site-header{display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding:26px var(--gutter)}
.identity{font-size:19px;font-weight:500;letter-spacing:-.015em;line-height:1.2}
.site-header nav{display:flex;gap:clamp(20px,3vw,40px);font-size:16px}
.languages{display:flex;gap:4px;font-size:14px}
.languages button{padding:2px 5px;color:var(--muted);transition:color .3s}
.languages button:hover{color:var(--ink)}
.languages button[aria-pressed=true]{color:var(--ink);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px}

/* Opening: words and the first plate share one screen */
.opening{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--col-gap);align-items:end;padding:clamp(28px,6vh,72px) var(--gutter) 0;min-height:calc(100svh - 82px)}
.intro{grid-column:1/span 5;padding-bottom:clamp(40px,8vh,96px)}
.intro .label{margin-bottom:clamp(18px,3vh,32px);font-size:clamp(16px,1.3vw,19px);color:var(--ink)}
h1{font-weight:300;font-size:clamp(40px,min(5.4vw,9.5vh),96px);line-height:1.02;letter-spacing:-.045em;text-wrap:balance}
.intro-text{max-width:46ch;margin-top:clamp(18px,3vh,30px);color:var(--muted);font-size:15px}
.hero{grid-column:6/-1;justify-self:end;width:min(100%,calc((100svh - 190px) * 1.25))}

/* Captions in the manner of a wall label */
.plate-caption{display:flex;justify-content:space-between;gap:20px;align-items:baseline;padding-top:16px;font-size:15px;color:var(--muted)}
.plate-title{font-size:16px;line-height:1.4;color:var(--ink)}
.plate-year{text-align:right;font-variant-numeric:tabular-nums}

.image-button{display:block;width:100%;cursor:zoom-in;background:#e6e3db}
.image-button img{width:100%;transition:opacity .4s}
.image-button:hover img{opacity:.92}

/* The project */
.project{padding:clamp(80px,13vh,150px) var(--gutter) 0}
.project-head{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--col-gap);row-gap:22px}
.project-head .label{grid-column:1/-1}
.project-head h2{grid-column:1/span 6;font-weight:300;font-size:clamp(44px,6vw,96px);line-height:1;letter-spacing:-.045em;padding-top:clamp(16px,3.5vh,40px)}
.project-text{grid-column:8/-1;padding-top:clamp(22px,4.5vh,52px);max-width:520px}
.project-text p+p{margin-top:18px}
.project-text p:not(.lede):not(.note){color:var(--muted)}

.plates{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--col-gap);row-gap:clamp(64px,12vh,140px);padding:clamp(64px,11vh,130px) 0 clamp(80px,13vh,150px)}
/* No plate is ever taller than the window: each width is capped by height × its ratio */
.plate figure{width:min(100%,calc((100svh - 120px) * 1.24))}
.plate--playground figure{margin-left:auto}
.plate--steel figure{margin-inline:auto}
.plate--stones{grid-column:1/span 7}
.plate--playground{grid-column:7/span 6}
.plate--steel{grid-column:2/span 10}
.plate--island{grid-column:5/span 4}
.plate--island figure{width:min(100%,617px)}

/* About */
.about{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--col-gap);row-gap:22px;margin:0 var(--gutter);padding:22px 0 clamp(72px,12vh,140px)}
.about .label{grid-column:1/-1}
.about h2{grid-column:1/span 5;font-weight:300;font-size:clamp(32px,3.4vw,52px);line-height:1.06;letter-spacing:-.035em;padding-top:clamp(16px,3.5vh,40px)}
.about-text{grid-column:7/-1;max-width:580px;padding-top:clamp(22px,4.5vh,52px)}
.about-text p+p{margin-top:18px}
.about-text p:not(.lede){color:var(--muted)}
.about-text .lede{margin-bottom:30px}
.facts{display:grid;grid-template-columns:auto 1fr;gap:6px 24px;margin-top:32px;font-size:14px}
.facts dt{color:var(--muted)}

/* Enquiries */
.contact{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--col-gap);row-gap:22px;margin:0 var(--gutter);padding:22px 0 clamp(72px,12vh,140px)}
.contact .label{grid-column:1/-1}
.contact h2{grid-column:1/span 6;font-weight:300;font-size:clamp(44px,6vw,96px);line-height:1;letter-spacing:-.045em;padding-top:clamp(16px,3.5vh,40px)}
.contact-body{grid-column:7/-1;align-self:end;max-width:560px}
.contact-body>p:first-child{color:var(--muted);max-width:42ch}
.contact-link{display:inline-block;margin:26px 0 22px;font-weight:300;font-size:clamp(24px,2.8vw,40px);letter-spacing:-.03em;line-height:1.2;background-size:100% 1px;transition:color .3s}
.contact-link:hover{color:var(--accent)}

/* Footer */
.site-footer{display:flex;justify-content:space-between;gap:20px;margin:0 var(--gutter);padding:22px 0 28px;font-size:13px;color:var(--muted)}
.site-footer a:hover{color:var(--ink)}

/* Arrival of each plate as it scrolls into view */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity 1.2s var(--ease),transform 1.2s var(--ease)}
.js .reveal.is-visible{opacity:1;transform:none}
.js .intro>*{animation:rise 1.1s var(--ease) both}
.js .intro h1{animation-delay:.08s}
.js .intro .intro-text{animation-delay:.2s}
@keyframes rise{from{opacity:0;transform:translateY(16px)}}

/* Viewer */
.viewer{width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;padding:0 var(--gutter);border:0;background:var(--paper);color:var(--ink)}
.viewer[open]{display:grid;grid-template-rows:auto minmax(0,1fr) auto;animation:fade .35s ease}
.viewer::backdrop{background:var(--paper)}
@keyframes fade{from{opacity:0}}
.viewer-top{display:flex;justify-content:space-between;align-items:baseline;padding:22px 0;font-size:14px}
.viewer-count{color:var(--muted);font-variant-numeric:tabular-nums}
.viewer-close{font-size:14px}
.viewer-close:hover{color:var(--accent)}
.viewer-stage{position:relative;display:flex;align-items:center;justify-content:center;min-height:0}
.viewer-stage img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;transition:opacity .45s ease}
.viewer-stage img.is-loading{opacity:0}
.viewer-zone{position:absolute;top:0;bottom:0;width:50%;z-index:1}
.viewer-zone--prev{left:0;cursor:w-resize}
.viewer-zone--next{right:0;cursor:e-resize}
.viewer-bottom{display:flex;justify-content:space-between;align-items:end;gap:32px;padding:22px 0 26px}
.viewer-caption{max-width:680px}
.viewer-caption h2{font-weight:400;font-size:clamp(18px,1.6vw,23px);line-height:1.25;letter-spacing:-.02em}
#viewer-meta{margin-top:6px;font-size:13px;color:var(--muted)}
.viewer-note{margin-top:4px;font-size:13px;color:var(--muted)}
#viewer-enquiry{color:var(--ink);margin-left:4px;background-size:100% 1px}
#viewer-enquiry:hover{color:var(--accent)}
.viewer-nav{display:flex;gap:28px;font-size:14px;white-space:nowrap}
.viewer-nav button:hover{color:var(--accent)}
body:has(.viewer[open]){overflow:hidden}

@media (max-width:900px){
  .opening{min-height:0;align-items:start}
  .intro{grid-column:1/-1;padding-bottom:clamp(32px,6vh,56px)}
  .hero{grid-column:1/-1;justify-self:stretch;width:100%}
  h1{font-size:clamp(40px,8vw,72px)}
  .intro-text{max-width:40ch}
  .project-head h2,.project-text,.about h2,.about-text,.contact h2,.contact-body{grid-column:1/-1}
  .project-text,.about-text{padding-top:8px}
  .plate--stones{grid-column:1/span 9}
  .plate--playground{grid-column:4/-1}
  .plate--steel{grid-column:1/-1}
  .plate--island{grid-column:3/span 8}
}

@media (max-width:700px){
  body{font-size:15px}
  .site-header{flex-wrap:wrap;row-gap:14px;padding-top:20px;padding-bottom:20px}
  .identity{font-size:20px}
  .site-header nav{order:3;width:100%;gap:24px;font-size:15px}
  h1{font-size:clamp(40px,12vw,58px)}
  .intro .label{font-size:16px}
  .opening{padding-inline:0}
  .intro{padding-inline:var(--gutter)}
  .hero .plate-caption{padding-inline:var(--gutter)}
  .hero .plate-year{display:none}
  .plates{row-gap:72px}
  .plate--stones,.plate--playground,.plate--steel,.plate--island{grid-column:1/-1}
  .plate-caption{gap:12px}
  .plate-title{font-size:15px}
  .site-footer{flex-wrap:wrap;row-gap:6px}
  .site-footer>span:nth-child(2){order:3;width:100%}
  .viewer-top{padding:16px 0}
  .viewer-bottom{flex-direction:column;align-items:stretch;gap:18px;padding-bottom:22px}
  .viewer-nav{justify-content:space-between}
  .viewer-zone{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .js .reveal{opacity:1;transform:none}
}