/* Olga Tochilin — portfolio
   Monochrome, hairline borders, large radii, Host Grotesk, quick restrained motion. */

@font-face{
  font-family:"Host Grotesk";
  src:url("fonts/HostGrotesk-latin.woff2") format("woff2");
  font-weight:300 800;font-style:normal;font-display:swap;
}

:root{
  --n0:#fff; --n100:#f5f5f5; --n200:#ddd; --n300:#c4c4c4; --n500:#888; --n600:#666; --n900:#333;
  --hair:.5px solid var(--n300);
  --radius:24px;
  --edge:clamp(20px,5vw,64px);
  --max:1120px;
  --read:720px;
  --header:80px;
  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-ui:cubic-bezier(.5,0,.5,1);
  --font:"Host Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{
  margin:0;padding-top:var(--header);
  background:var(--n0);color:var(--n900);
  font:330 18px/1.6 var(--font);letter-spacing:0;
  -webkit-font-smoothing:antialiased;text-wrap:pretty;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
svg{width:1.15em;height:1.15em;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* ---------- header: full-width bar → floating pill on scroll ---------- */
.site-header{position:fixed;inset:0 0 auto 0;z-index:20;display:flex;justify-content:center;padding:0 var(--edge);pointer-events:none}
.header-inner{
  pointer-events:auto;width:100%;max-width:var(--max);height:var(--header);
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:var(--hair);background:rgba(255,255,255,0);
  transition:max-width .5s var(--ease-out),height .5s var(--ease-out),margin-top .5s var(--ease-out),
             padding .5s var(--ease-out),border-radius .5s var(--ease-out),background .3s var(--ease-ui),
             box-shadow .5s var(--ease-out),border-color .3s var(--ease-ui);
}
.site-header.is-stuck .header-inner{
  max-width:740px;height:64px;margin-top:12px;padding:0 10px 0 8px;
  border-radius:999px;border-color:transparent;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:0 8px 32px rgba(0,0,0,.10),0 0 0 .5px rgba(0,0,0,.06);
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:400;font-size:17px}
.mono{
  flex:none;display:grid;place-items:center;width:48px;height:48px;border-radius:50%;
  background:var(--n900);color:#fff;font-size:15px;font-weight:600;letter-spacing:.04em;
  transition:width .5s var(--ease-out),height .5s var(--ease-out);
}
.is-stuck .mono{width:40px;height:40px}
.site-header nav{display:flex;align-items:center;gap:6px;font-size:17px}
.site-header nav a{white-space:nowrap;text-decoration:none;padding:8px 14px;border-radius:999px;transition:background .2s var(--ease-ui)}
.site-header nav a:hover{background:var(--n100)}
.nav-cta{display:inline-flex;align-items:center;gap:8px}
.nav-cta svg{width:1.05em;height:1.05em}

/* ---------- buttons: fill slides up on hover, quick press ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;overflow:hidden;
  height:64px;padding:0 40px;border-radius:999px;text-decoration:none;font-size:18px;font-weight:400;
  border:1px solid var(--n900);isolation:isolate;
  transition:transform .15s ease-out;
}
.btn span{position:relative;z-index:1;transition:color .25s var(--ease-ui)}
.btn::before{
  content:"";position:absolute;inset:0;z-index:0;transform:translateY(101%);border-radius:inherit;
  transition:transform .25s cubic-bezier(.42,0,1,1);
}
.btn:hover::before{transform:none;transition:transform .5s cubic-bezier(0,0,.58,1)}
.btn:active{transform:scale(.97);transition-duration:80ms}
.btn-solid{background:var(--n900);color:#fff}
.btn-solid::before{background:#000}
.btn-outline{background:transparent;color:var(--n900)}
.btn-outline::before{background:var(--n900)}
.btn-outline:hover span{color:#fff}

/* tertiary text link with "opens in new tab" icon */
.link-ext{
  display:inline-flex;align-items:center;gap:8px;height:64px;padding:0 8px;
  font-size:18px;text-decoration:none;border-radius:999px;
}
.link-ext span:first-child{background:linear-gradient(currentColor,currentColor) 0 100%/100% 1px no-repeat;padding-bottom:2px;transition:background-size .3s var(--ease-out)}
.link-ext:hover span:first-child{background-size:0 1px;background-position:100% 100%}
.link-ext svg{width:1.1em;height:1.1em;transition:transform .3s var(--ease-out)}
.link-ext:hover svg{transform:translate(2px,-2px)}
.link-ext:active{transform:scale(.97);transition:transform 80ms}
.link-ext:focus-visible{outline:2px solid var(--n900);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:var(--space,96px) var(--edge)}
.wrap.narrow{max-width:calc(var(--read) + 2*var(--edge))}
#work{padding-top:80px}

/* section heading:  Title ———— 01 */
.section-head{
  display:flex;align-items:center;gap:24px;margin:0 0 40px;
  font-size:clamp(28px,4vw,40px);line-height:1.1;font-weight:500;letter-spacing:-.02em;
}
.section-head i{flex:1;height:0;border-top:var(--hair)}
.section-head b{font-weight:500;font-variant-numeric:tabular-nums}

/* ---------- hero ---------- */
.hero{max-width:var(--max);margin:0 auto;padding:clamp(72px,12vw,150px) var(--edge) clamp(56px,8vw,96px);text-align:center}
.hero h1{
  margin:0 auto;max-width:17em;font-size:clamp(34px,5.6vw,64px);line-height:1.08;
  font-weight:600;letter-spacing:-.03em;text-wrap:balance;
}
.hero-cta{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;margin-top:48px}

/* ---------- work cards ---------- */

.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.card{
  display:flex;flex-direction:column;overflow:hidden;text-decoration:none;
  border:var(--hair);border-radius:var(--radius);background:var(--n0);
  padding:clamp(24px,3vw,40px) clamp(20px,2.4vw,32px) 0;
  transition:border-color .3s var(--ease-ui),transform .15s ease-out,opacity .64s var(--ease-out);
}
.card[hidden]{display:none}
.card:hover{border-color:var(--n900)}
.card:active{transform:scale(.985);transition-duration:80ms}
.card-text{display:block;text-align:center;margin-bottom:28px}
.card-title{display:block;font-size:clamp(22px,2.4vw,28px);line-height:1.15;font-weight:500;letter-spacing:-.02em;text-wrap:balance}
.card-media{display:block;margin-top:auto;border-radius:16px 16px 0 0;overflow:hidden;background:var(--n100)}
.card-media img{width:100%;aspect-ratio:1200/509;object-fit:cover;transform:translateY(8px) scale(1);transform-origin:50% 100%;transition:transform .6s var(--ease-out)}
.card:hover .card-media img{transform:translateY(0) scale(1.03)}

/* ---------- experience ---------- */
.exp{list-style:none;margin:0 0 40px;padding:0}
.exp li{
  display:grid;grid-template-columns:10em 1fr auto;gap:16px;align-items:baseline;
  padding:24px 0;border-top:var(--hair);
}
.exp li:last-child{border-bottom:var(--hair)}
.exp .yr{color:var(--n600);font-variant-numeric:tabular-nums}
.exp .role{font-size:clamp(20px,2.4vw,26px);font-weight:500;letter-spacing:-.01em;transition:transform .4s var(--ease-out)}
.exp .co{color:var(--n600);text-align:right}
.exp li:hover .role{transform:translateX(8px)}

/* ---------- case study ---------- */
.project .wrap.narrow{padding-top:56px}
.back{margin:0 0 56px;font-size:16px}
.back a{text-decoration:none;color:var(--n600)}
.back a:hover{color:var(--n900)}
.project h1{margin:0 0 40px;font-size:clamp(36px,6vw,64px);line-height:1.06;font-weight:600;letter-spacing:-.03em;text-wrap:balance}
.meta{display:flex;flex-wrap:wrap;gap:20px 48px;margin:0 0 24px;padding:24px 0;border-block:var(--hair);font-size:16px}
.meta dt{color:var(--n600);margin-bottom:2px}
.meta dd{margin:0;max-width:26em}
.project .section-head{margin:112px 0 40px}
.project h3.h{margin:64px 0 16px;font-size:clamp(24px,3vw,32px);line-height:1.15;font-weight:500;letter-spacing:-.02em;text-wrap:balance}
.project h4.sub{margin:32px 0 6px;font-size:20px;line-height:1.3;font-weight:500;letter-spacing:-.01em}
.project p{margin:0 0 18px;font-size:19px;line-height:1.65}
.project ul{padding-left:1.2em;margin:0 0 22px;font-size:19px}
.project li{margin-bottom:8px}
.project figure{margin:40px calc(-1 * min(12vw,170px))}
.project figure img{width:100%;border:var(--hair);border-radius:var(--radius);background:var(--n100)}
@media (max-width:1000px){.project figure{margin-inline:0}}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin:32px 0}
.stat{padding:28px 24px;border:var(--hair);border-radius:var(--radius)}
.stat .num{font-size:56px;font-weight:600;letter-spacing:-.04em;line-height:1}
.stat h3{font-size:18px;font-weight:500;margin:14px 0 8px;line-height:1.25}
.stat p{font-size:16px!important;color:var(--n600);margin:0!important;line-height:1.5!important}
.thanks{text-align:center;color:var(--n600);margin:96px 0 0!important}
.project .wrap:last-of-type{padding-top:40px}

/* ---------- pixel-mosaic reveal (see site.js) ---------- */
[data-pixel]{position:relative}
.px-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:2;pointer-events:none;display:block}

/* ---------- footer ---------- */
.site-footer{
  max-width:var(--max);margin:0 auto;padding:32px var(--edge) 40px;
  display:flex;justify-content:space-between;gap:16px;font-size:15px;color:var(--n600);
}
.to-top{text-decoration:none}
.to-top:hover{color:var(--n900)}

/* ---------- scroll reveal (only when JS is on) ---------- */
.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .64s var(--ease-out),transform .64s var(--ease-out)}
.js [data-reveal].in{opacity:1;transform:none}
.js .card[data-reveal]{transition:opacity .64s var(--ease-out),transform .64s var(--ease-out),border-color .3s var(--ease-ui)}
.js .card[data-reveal].in:active{transform:scale(.985);transition-duration:80ms}

/* ---------- small screens ---------- */
@media (max-width:820px){
  .grid{grid-template-columns:1fr}
  .exp li{grid-template-columns:1fr auto;gap:4px 16px}
  .exp .yr{grid-column:2;grid-row:1;text-align:right}
  .exp .role{grid-column:1;grid-row:1}
  .exp .co{grid-column:1/-1;text-align:left}
}
@media (max-width:520px){
  .brand-name{display:none}
  .site-header nav a{padding:8px 10px}
}
@media (max-width:600px){
  body{font-size:17px}
  .site-header nav a:not(.nav-cta){display:none}
  .site-header.is-stuck .header-inner{max-width:100%}
    .btn{height:56px;padding:0 28px;font-size:17px}
  .link-ext{height:56px;font-size:17px}
  .hero-cta{gap:12px}
  .section-head{gap:16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
  .js [data-reveal]{opacity:1;transform:none}
}

/* ---------- What I do: dotted-shape cards with slide-up hover ---------- */
#what{padding-top:24px;padding-bottom:0}
.what-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.what-card{
  --pad:clamp(20px,2.4vw,32px);
  position:relative;overflow:hidden;isolation:isolate;outline-offset:3px;
  display:flex;flex-direction:column;justify-content:space-between;gap:32px;
  border:var(--hair);border-radius:var(--radius);padding:var(--pad);
  min-height:clamp(320px,30vw,400px);background:var(--n0);cursor:default;
}
.dots{position:relative;z-index:0;width:78%;max-width:260px;height:auto;color:var(--n900);overflow:visible}
.what-card h3{position:relative;z-index:0;margin:0;font-size:clamp(20px,1.9vw,26px);line-height:1.25;font-weight:500;letter-spacing:-.02em;white-space:nowrap}
/* dark layer rises from the bottom and covers dots + title */
.what-layer{
  position:absolute;inset:0;z-index:1;background:var(--n900);pointer-events:none;
  transform:translateY(101%);transition:transform .3s var(--ease-out);
}
/* white copy lives inside the layer, so it rises with it */
.what-desc{
  position:absolute;top:var(--pad);left:var(--pad);width:min(220px,calc(100% - 2 * var(--pad)));
  margin:0;color:#fff;font-size:18px;line-height:26px;font-weight:310;
}
.what-card:hover .what-layer,.what-card:focus-visible .what-layer{transform:none}

/* touch / small screens: no hover — show title + copy, swipe sideways */
@media (max-width:820px),(hover:none){
  .what-grid{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--edge);margin-inline:calc(-1 * var(--edge));padding:0 var(--edge) 8px;scrollbar-width:none}
  .what-grid::-webkit-scrollbar{display:none}
  .what-card{flex:0 0 min(84%,340px);scroll-snap-align:start;min-height:0;gap:16px;justify-content:flex-start;padding:28px 24px}
  .what-card h3{order:0;white-space:normal;font-size:24px}
  .dots{display:none}
  .what-layer{display:contents}
  .what-desc{position:static;order:1;width:auto;color:var(--n900);font-weight:330;pointer-events:auto}
}
@media (prefers-reduced-motion:reduce){.what-layer{transition-duration:.01ms}}