/* ===== GertsLab — foundation (dark lab) ===== */
:root{
  --bg:#0B0C10; --surface:#14161C; --surface-2:#1B1E26;
  --text:#F4F5F7; --muted:#8A8F98; --line:rgba(255,255,255,.09);
  --accent:#C6F24E; --accent-ink:#0B0C10; --accent-2:#6E56F8;
  --maxw:1200px; --pad:clamp(16px,4vw,40px);
  --r:14px; --r-lg:24px;
  --f-head:'Unbounded',system-ui,sans-serif;
  --f-body:'Inter',system-ui,sans-serif;
  --f-mono:'JetBrains Mono',ui-monospace,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--text);font-family:var(--f-body);
  font-size:18px;line-height:1.5;font-weight:400;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--accent);color:var(--accent-ink)}
.container{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}
.mono{font-family:var(--f-mono);font-size:.8rem;letter-spacing:.04em;color:var(--muted);text-transform:uppercase}

/* subtle grid background */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
  opacity:.5;
}

/* ===== Preloader ===== */
.preloader{
  position:fixed;inset:0;z-index:9999;background:var(--bg);
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:18px;
  transition:opacity .6s var(--ease),visibility .6s;
}
.preloader.done{opacity:0;visibility:hidden}
.preloader__logo{font-family:var(--f-head);font-weight:800;font-size:clamp(1.4rem,4vw,2rem);letter-spacing:-.02em}
.preloader__logo b{color:var(--accent)}
.preloader__num{font-family:var(--f-mono);color:var(--muted);font-size:.9rem}
.preloader__bar{width:min(240px,60vw);height:2px;background:var(--line);overflow:hidden}
.preloader__bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s linear}

/* ===== Custom cursor ===== */
.cursor{position:fixed;top:0;left:0;z-index:9998;pointer-events:none;mix-blend-mode:difference}
.cursor__dot{position:fixed;width:6px;height:6px;border-radius:50%;background:#fff;transform:translate(-50%,-50%)}
.cursor__ring{position:fixed;width:34px;height:34px;border:1px solid #fff;border-radius:50%;transform:translate(-50%,-50%);transition:width .25s var(--ease),height .25s var(--ease),opacity .25s}
.cursor.is-hover .cursor__ring{width:54px;height:54px;background:rgba(255,255,255,.08)}
@media (hover:none){.cursor{display:none}}

/* ===== Nav ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--pad);transition:background .3s,backdrop-filter .3s,padding .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(11,12,16,.72);backdrop-filter:blur(12px);border-color:var(--line);padding-block:12px}
.nav__logo{font-family:var(--f-head);font-weight:800;font-size:1.25rem;letter-spacing:-.02em;display:flex;align-items:center;gap:8px}
.nav__logo b{color:var(--accent)}
.nav__dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.nav__menu{display:flex;align-items:center;gap:28px}
.nav__menu a{font-size:.95rem;color:var(--muted);transition:color .2s}
.nav__menu a:hover{color:var(--text)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__burger span{width:24px;height:2px;background:var(--text);transition:.3s}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--f-body);font-weight:600;font-size:.95rem;
  padding:13px 22px;border-radius:100px;border:1px solid var(--line);background:transparent;color:var(--text);
  cursor:pointer;transition:transform .2s var(--ease),background .25s,color .25s,border-color .25s;will-change:transform;
}
.btn--accent{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn--accent:hover{box-shadow:0 8px 30px rgba(198,242,78,.25)}
.btn--ghost:hover{border-color:var(--text)}

/* ===== Hero ===== */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;padding-top:90px;overflow:hidden}
.hero__canvas{position:absolute;inset:0;z-index:0}
.hero__inner{position:relative;z-index:2;max-width:920px}
.hero__tag{display:inline-flex;align-items:center;gap:10px;margin-bottom:26px}
.hero__tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.hero h1{
  font-family:var(--f-head);font-weight:800;line-height:1.02;letter-spacing:-.025em;
  font-size:clamp(2.4rem,7vw,5.6rem);margin-bottom:24px;
}
.hero h1 .ln{display:block;overflow:hidden}
.hero h1 .ln>span{display:block;transform:translateY(110%);animation:rise .9s var(--ease) forwards}
.hero h1 .ln:nth-child(2)>span{animation-delay:.12s}
.hero h1 em{color:var(--accent);font-style:normal}
@keyframes rise{to{transform:translateY(0)}}
.hero__sub{font-size:clamp(1rem,2vw,1.25rem);color:var(--muted);max-width:620px;margin-bottom:36px;opacity:0;animation:fade .8s .5s var(--ease) forwards}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px;opacity:0;animation:fade .8s .65s var(--ease) forwards}
.hero__stats{display:flex;gap:24px;flex-wrap:wrap;opacity:0;animation:fade .8s .8s var(--ease) forwards}
.hero__stats span{position:relative;padding-left:16px}
.hero__stats span::before{content:"";position:absolute;left:0;top:50%;width:5px;height:5px;border-radius:50%;background:var(--accent);transform:translateY(-50%)}
@keyframes fade{to{opacity:1}}
.hero__scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;color:var(--muted);font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;animation:bob 2s infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ===== Footer ===== */
.footer{position:relative;z-index:2;border-top:1px solid var(--line);margin-top:0;padding:64px 0 36px}
.footer__grid{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:40px}
.footer__logo{font-family:var(--f-head);font-weight:800;font-size:1.5rem}
.footer__logo b{color:var(--accent)}
.footer__tagline{color:var(--muted);max-width:280px;margin-top:12px;font-size:.95rem}
.footer__col h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:14px;font-weight:600}
.footer__col a{display:block;color:var(--text);margin-bottom:9px;font-size:.95rem;opacity:.85;transition:opacity .2s,color .2s}
.footer__col a:hover{opacity:1;color:var(--accent)}
.footer__bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}

/* ===== Responsive ===== */
@media (max-width:760px){
  .nav__menu{position:fixed;inset:0 0 0 auto;width:min(300px,82vw);background:var(--surface);flex-direction:column;align-items:flex-start;justify-content:center;padding:40px;gap:22px;transform:translateX(100%);transition:transform .4s var(--ease);border-left:1px solid var(--line)}
  .nav__menu.open{transform:translateX(0)}
  .nav__menu a{font-size:1.2rem;color:var(--text)}
  .nav__burger{display:flex}
  .hero{min-height:92svh}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .hero h1 .ln>span{transform:none}.hero__sub,.hero__cta,.hero__stats{opacity:1}
  .case__shot img,.case:hover .case__shot img{transition:none}
}

/* ===== Section heading ===== */
.sec-head{max-width:700px;margin:0 auto 48px;text-align:center}
.sec-head__tag{color:var(--accent);display:inline-block;margin-bottom:14px}
.sec-head__title{font-family:var(--f-head);font-weight:800;font-size:clamp(1.8rem,4.5vw,3.2rem);letter-spacing:-.02em;line-height:1.05;margin-bottom:16px}
.sec-head__sub{color:var(--muted);font-size:1.05rem}

/* ===== Cases ===== */
.cases{position:relative;z-index:2;padding:clamp(60px,9vw,120px) 0}
.cases__filters{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px}
.chip{font-family:var(--f-body);font-size:.9rem;color:var(--muted);background:var(--surface);border:1px solid var(--line);padding:9px 18px;border-radius:100px;cursor:pointer;transition:.2s}
.chip:hover{color:var(--text);border-color:var(--text)}
.chip.is-active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.cases__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.case{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:transform .35s var(--ease),border-color .3s,box-shadow .35s}
.case:hover{transform:translateY(-6px);border-color:rgba(198,242,78,.4);box-shadow:0 20px 50px rgba(0,0,0,.45)}
.case__preview{position:relative;height:300px;overflow:hidden;background:linear-gradient(135deg,#1B1E26,#0E0F13)}
.case__scroll{height:100%;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:rgba(198,242,78,.6) transparent}
.case__scroll::-webkit-scrollbar{width:6px}
.case__scroll::-webkit-scrollbar-track{background:transparent}
.case__scroll::-webkit-scrollbar-thumb{background:rgba(198,242,78,.5);border-radius:6px}
.case__scroll img{width:100%;height:auto;display:block}
.case__hint{position:absolute;bottom:10px;right:10px;display:inline-flex;align-items:center;gap:6px;background:rgba(11,12,16,.78);backdrop-filter:blur(6px);color:var(--text);padding:5px 11px;border-radius:100px;font-size:.68rem;pointer-events:none;border:1px solid var(--line);transition:opacity .3s}
.case:hover .case__hint{opacity:.35}
.case__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:6px;flex:1}
.case__niche{color:var(--accent)}
.case__body h3{font-family:var(--f-head);font-weight:600;font-size:1.25rem;letter-spacing:-.01em}
.case__body p{color:var(--muted);font-size:.93rem;flex:1;line-height:1.4}
.case__link{display:inline-block;align-self:flex-start;color:var(--text);font-weight:600;font-size:.9rem;margin-top:12px;opacity:.7;transition:opacity .2s,color .2s}
.case:hover .case__link{opacity:1;color:var(--accent)}
.case.hide{display:none}
.cases__cta{text-align:center;margin-top:54px}
.cases__cta p{color:var(--muted);font-size:1.1rem;margin-bottom:20px}
.cases__cta b{color:var(--text)}