:root{
  --bg:#14171C;
  --bg-raised:#1B1F27;
  --ink:#F2F0EA;
  --ink-muted:#9AA0AC;
  --gate-red:#E8384F;
  --gate-blue:#3E7BFF;
  --line:#2A2F3A;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Work Sans', sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

.container{
  max-width:960px;
  margin:0 auto;
  padding:0 28px;
}

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.12;
  margin:0 0 20px;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(2.1rem,5vw,3.4rem);}
h2{font-size:clamp(1.5rem,3vw,2.1rem);max-width:26ch;}
h3{font-size:1.25rem;margin-bottom:10px;}

p{margin:0 0 16px;max-width:62ch;color:var(--ink);}
.lead{color:var(--ink-muted);font-size:1.05rem;max-width:56ch;}

a{color:inherit;}

/* rail — single continuous accent, the one bold element on the page */
.rail{
  position:fixed;
  top:0;left:0;
  width:4px;
  height:100vh;
  background:linear-gradient(var(--gate-red), var(--gate-blue));
  transform-origin:top;
  animation:draw-rail 1.1s cubic-bezier(.4,0,.2,1) forwards;
  z-index:5;
}
@keyframes draw-rail{
  from{transform:scaleY(0);}
  to{transform:scaleY(1);}
}
@media (prefers-reduced-motion: reduce){
  .rail{animation:none;transform:scaleY(1);}
  html{scroll-behavior:auto;}
}

/* header */
.site-header{
  border-bottom:1px solid var(--line);
  padding:20px 0;
}
.header-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}
.brand-word{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.15rem;
}
.main-nav{
  display:flex;
  gap:28px;
  font-size:0.95rem;
}
.main-nav a{text-decoration:none;color:var(--ink-muted);transition:color 150ms ease;}
.main-nav a:hover{color:var(--ink);}

.lang-toggle{display:flex;border:1px solid var(--line);border-radius:5px;overflow:hidden;}
.lang-toggle button{
  background:transparent;
  border:none;
  color:var(--ink-muted);
  font-family:var(--font-body);
  font-size:0.8rem;
  font-weight:600;
  padding:6px 11px;
  cursor:pointer;
}
.lang-toggle button[aria-pressed="true"]{background:var(--bg-raised);color:var(--ink);}

/* hero */
.hero{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:40px;
  align-items:center;
  padding:88px 28px 96px;
}
.hero-mark{
  width:100%;
  max-width:320px;
  aspect-ratio:320/360;
  justify-self:center;
  display:block;
  touch-action:none;
}
.hero-mark-fallback{
  font-family:var(--font-display);
  font-weight:700;
  font-size:2rem;
  color:var(--ink-muted);
}

.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px;}
.btn{
  display:inline-block;
  padding:12px 22px;
  border-radius:4px;
  font-size:0.95rem;
  font-weight:600;
  text-decoration:none;
  border:1px solid transparent;
}
.btn-primary{background:var(--ink);color:var(--bg);}
.btn-primary:hover{background:#fff;}
.btn-ghost{border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink-muted);}
.text-link{
  text-decoration:underline;
  text-decoration-color:var(--line);
  text-underline-offset:4px;
  color:var(--ink);
  align-self:center;
}
.text-link:hover{text-decoration-color:var(--ink);}

/* sections */
main{perspective:1400px;}
.split{
  padding:76px 28px;
  border-top:1px solid var(--line);
  opacity:0;
  transform:rotateX(-10deg) translateY(36px);
  transform-origin:top center;
  transition:opacity 0.9s cubic-bezier(.4,0,.2,1), transform 0.9s cubic-bezier(.4,0,.2,1);
  will-change:transform, opacity;
}
.split.in-view{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  .split{opacity:1;transform:none;transition:none;}
}
.about-row{display:grid;grid-template-columns:1.2fr 0.8fr;gap:48px;align-items:start;}

.spec-list{margin:24px 0 0;}
.spec-row{
  display:grid;
  grid-template-columns:180px 1fr;
  gap:24px;
  padding:16px 0;
  border-top:1px solid var(--line);
}
.spec-row:last-child{border-bottom:1px solid var(--line);}
.spec-row dt{
  font-family:var(--font-display);
  font-weight:500;
  color:var(--ink);
  margin:0;
}
.spec-row dd{margin:0;color:var(--ink-muted);max-width:52ch;}
.spec-list--tight .spec-row{grid-template-columns:140px 1fr;padding:12px 0;}

.case{max-width:640px;}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:28px 0;color:var(--ink-muted);font-size:0.85rem;}
.footer-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}

/* responsive */
@media (max-width:760px){
  .hero{grid-template-columns:1fr;padding-top:56px;}
  .hero-mark{order:-1;max-width:220px;}
  .about-row{grid-template-columns:1fr;}
  .main-nav{order:3;width:100%;justify-content:flex-start;gap:20px;}
  .spec-row{grid-template-columns:1fr;gap:4px;}
  .spec-list--tight .spec-row{grid-template-columns:1fr;}
}