/* Стиль сайта ARBA (arba-international.com/nexus): графит, Geologica, фирменный градиент. */
@font-face{font-family:Geologica;src:url('/assets/geologica-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap;unicode-range:U+0-FF,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2190-2199,U+2212,U+2215,U+FEFF,U+FFFD}
:root{
  color-scheme:dark;
  --obsidian:oklch(14% .013 283);
  --graphite:oklch(17.5% .016 283);
  --ink:oklch(96.5% .006 283);
  --ink2:oklch(83% .016 283);
  --steel:oklch(70% .024 275);
  --line:oklch(96% .01 283/.09);
  --line2:oklch(96% .01 283/.17);
  --dot:#9657f0;
  --link:#b9a6ff;
  --grad:linear-gradient(115deg in oklch,#a91fd1,#7f49e8 52%,#435cff);
  --pad:clamp(16px,4.5vw,64px);
  --max:1360px;
  --font:Geologica,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html,body{overflow-x:hidden}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--obsidian);color:var(--ink);font:400 17px/1.62 var(--font);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--link);outline-offset:4px;border-radius:4px}
.skip-link{position:fixed;top:-80px;left:16px;z-index:10;padding:12px 18px;border-radius:8px;background:var(--graphite);color:var(--ink)}
.skip-link:focus{top:16px}

.top,main,.foot{max-width:calc(var(--max) + 2*var(--pad));margin:0 auto;padding-inline:var(--pad)}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px;position:relative;z-index:2}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand img{flex:none;width:36px;height:36px}
.brand-name{font-size:19px;font-weight:600;letter-spacing:-.01em}
.brand-by{font-size:14px;color:var(--steel);white-space:nowrap}
.top-nav{display:flex;align-items:center;gap:24px}
.top-link{font-size:15px;color:oklch(96.5% .006 283/.86);white-space:nowrap;transition:color .15s ease-out}
.top-link:hover{color:var(--ink)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:50px;padding:0 24px;border-radius:8px;font-size:16px;font-weight:600;letter-spacing:-.005em;white-space:nowrap;transition:filter .18s ease-out,background-color .18s ease-out,transform .18s ease-out}
.btn:active{transform:scale(.98)}
.btn-primary{color:#fff;background:var(--grad);box-shadow:inset 0 1px 0 rgba(255,255,255,.3),inset 0 -1px 0 rgba(0,0,0,.22),0 10px 28px -14px rgba(139,69,236,.95)}
.btn-primary:hover{filter:brightness(1.1)}
.btn-glass{color:var(--ink);background:linear-gradient(rgba(255,255,255,.1),rgba(255,255,255,.03));box-shadow:inset 0 1px 0 rgba(255,255,255,.32),inset 0 0 0 1px rgba(255,255,255,.12),0 8px 24px -12px rgba(0,0,0,.6)}
.btn-glass:hover{background-color:rgba(255,255,255,.06)}
.btn-sm{height:42px;padding:0 18px;font-size:15px}

.hero{position:relative;padding:clamp(72px,12vh,150px) 0 clamp(64px,9vh,96px)}
.glow{position:absolute;z-index:-1;top:-40px;right:-12%;width:min(760px,80vw);aspect-ratio:1;border-radius:50%;background:radial-gradient(closest-side,rgba(127,73,232,.42),rgba(67,92,255,.18) 55%,transparent);filter:blur(40px);pointer-events:none}
.eyebrow{margin:0 0 20px;font-size:15px;color:var(--steel)}
h1,h2,h3{text-wrap:balance}
h1{max-width:15ch;margin:0;font-size:clamp(2.6rem,1.3rem + 4.3vw,4.6rem);line-height:1.02;letter-spacing:-.036em;font-weight:600}
.lead{max-width:58ch;margin:28px 0 0;font-size:clamp(17px,1rem + .3vw,19.5px);line-height:1.62;color:var(--ink2)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.facts{display:flex;flex-wrap:wrap;gap:12px 28px;margin:44px 0 0;padding:28px 0 0;list-style:none;border-top:1px solid var(--line);font-size:15px;color:var(--ink2)}
.facts li{display:flex;align-items:center;gap:10px}
.facts li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--dot);flex:none}

.parts{padding:clamp(56px,9vh,104px) 0;border-top:1px solid var(--line)}
.parts-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px 64px;align-items:end}
h2{margin:0;font-size:clamp(2rem,1.3rem + 2vw,3rem);line-height:1.04;letter-spacing:-.03em;font-weight:600}
.parts-head p,.next p{margin:0;max-width:56ch;color:var(--ink2)}
.part-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:48px 0 0;padding:0;list-style:none;border-top:1px solid var(--line2)}
.part-list li+li{border-left:1px solid var(--line)}
.part-list a{display:flex;flex-direction:column;height:100%;padding:28px 24px 24px;transition:background-color .2s ease-out}
.part-list li:first-child a{padding-left:0}
.part-list a:hover{background-color:oklch(96% .01 283/.035)}
h3{margin:0 0 10px;font-size:20px;line-height:1.25;letter-spacing:-.015em;font-weight:600}
.part-list p{margin:0 0 20px;font-size:15.5px;line-height:1.55;color:var(--ink2)}
.more{margin-top:auto;font-size:14px;color:var(--link)}
.part-list a:hover .more{color:var(--ink)}

.next{padding:clamp(56px,9vh,96px) 0 clamp(64px,10vh,112px);border-top:1px solid var(--line)}
.next p{margin-top:18px}

.foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 32px;padding-block:28px 36px;border-top:1px solid var(--line);font-size:14px;color:var(--steel)}
.foot p{margin:0}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 24px}
.foot a{transition:color .15s ease-out}
.foot a:hover{color:var(--ink)}

@media (prefers-reduced-motion:no-preference){
  .hero>*:not(.glow){animation:rise .8s cubic-bezier(.22,1,.36,1) backwards}
  .hero h1{animation-delay:60ms}.hero .lead{animation-delay:120ms}.hero .actions{animation-delay:180ms}.hero .facts{animation-delay:240ms}
  .glow{animation:fade 1.6s ease-out backwards}
}
@keyframes rise{from{opacity:0;transform:translateY(14px)}}
@keyframes fade{from{opacity:0}}

@media (max-width:1000px){
  .parts-head{grid-template-columns:1fr}
  .part-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .part-list li:nth-child(3){border-left:0}
  .part-list li:nth-child(3) a{padding-left:0}
  .part-list li:nth-child(n+3){border-top:1px solid var(--line)}
}
@media (max-width:640px){
  .top-link{display:none}
  .brand-by{display:none}
  .part-list{grid-template-columns:1fr}
  .part-list li+li{border-left:0;border-top:1px solid var(--line)}
  .part-list a,.part-list li:first-child a{padding:22px 0}
  .actions .btn{width:100%}
}