:root{--bg:#04060c;--bg2:#070b16;--ink:#e8eefc;--mute:#9aa7c2;--line:rgba(140,170,255,.14);--glass:rgba(16,24,44,.55);--cyan:#22d3ee;--blue:#3b82f6;--green:#4ade80;--orange:#fb923c;--r:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 "Inter",system-ui,sans-serif;overflow-x:hidden}
h1,h2,h3,.brand{font-family:"Space Grotesk","Inter",sans-serif;letter-spacing:-.02em;line-height:1.15}
a{color:var(--cyan);text-decoration:none}a:hover{color:#7ee8fa}
.bgfx{position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(60vw 40vw at 15% -10%,rgba(59,130,246,.22),transparent 60%),radial-gradient(50vw 35vw at 95% 10%,rgba(74,222,128,.12),transparent 60%),radial-gradient(40vw 30vw at 60% 110%,rgba(251,146,60,.10),transparent 60%),var(--bg)}
.bgfx:after{content:"";position:absolute;inset:-60px;background-image:linear-gradient(rgba(34,211,238,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.07) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse at 50% 30%,#000 30%,transparent 75%);animation:grid 24s linear infinite}
@keyframes grid{to{transform:translate(56px,56px)}}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
header.top{position:sticky;top:0;z-index:20;backdrop-filter:blur(14px);background:rgba(4,6,12,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:1.12rem}
.nav nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.nav nav a{color:var(--mute);padding:8px 12px;border-radius:10px;font-size:.94rem}
.nav nav a:hover,.nav nav a[aria-current]{color:var(--ink);background:rgba(34,211,238,.08)}
.menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 12px}
@media(max-width:860px){.menu{display:block}.nav nav{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:rgba(4,6,12,.96);padding:12px 22px;border-bottom:1px solid var(--line)}.nav nav.open{display:flex}}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:12px;font-weight:600;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s}
.btn.primary{background:linear-gradient(135deg,var(--cyan),var(--blue));color:#02121a;box-shadow:0 0 24px rgba(34,211,238,.35)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(34,211,238,.55);color:#02121a}
.btn.ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.03)}
.btn.ghost:hover{border-color:rgba(34,211,238,.5);transform:translateY(-2px)}
.hero{padding:88px 0 56px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
@media(max-width:860px){.hero{grid-template-columns:1fr;padding-top:48px}}
.eyebrow{display:inline-block;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);border:1px solid rgba(34,211,238,.3);padding:5px 12px;border-radius:99px;background:rgba(34,211,238,.06)}
.hero h1{font-size:clamp(2.2rem,5vw,3.7rem);margin:18px 0}
.grad{background:linear-gradient(90deg,var(--cyan),var(--green) 55%,var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--mute);font-size:1.13rem;max-width:58ch}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.orb{position:relative;justify-self:center;width:min(380px,80vw);aspect-ratio:1;contain:layout}
.orb:before{content:"";position:absolute;inset:8%;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.28),rgba(74,222,128,.10) 50%,transparent 70%);filter:blur(18px);animation:pulse 6s ease-in-out infinite}
.orb:after{content:"";position:absolute;inset:0;border-radius:50%;border:1px dashed rgba(34,211,238,.22);animation:spin 40s linear infinite}
.orb .hero-logo{position:absolute;inset:6%;animation:float 7s ease-in-out infinite}
.orb .hero-logo img{width:100%;height:100%;object-fit:contain}
@keyframes pulse{50%{opacity:.6;transform:scale(1.05)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes float{50%{transform:translateY(-10px)}}
section{padding:56px 0}
.sh{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.sh h2{font-size:clamp(1.6rem,3vw,2.3rem);margin:8px 0 0}.sh p{color:var(--mute);margin:6px 0 0;max-width:60ch}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.card{position:relative;background:var(--glass);border:1px solid var(--line);border-radius:var(--r);padding:22px;backdrop-filter:blur(12px);transition:transform .25s,border-color .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.45);box-shadow:0 10px 40px -10px rgba(34,211,238,.35)}
.card h3{margin:6px 0 8px;font-size:1.18rem}.card p{color:var(--mute);margin:0 0 12px}
.tag{display:inline-block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:99px;border:1px solid var(--line);color:var(--mute);margin-right:6px}
.tag.c{color:var(--cyan);border-color:rgba(34,211,238,.35)}.tag.g{color:var(--green);border-color:rgba(74,222,128,.35)}.tag.o{color:var(--orange);border-color:rgba(251,146,60,.4)}
.price{font-family:"Space Grotesk";font-size:2rem;font-weight:700;margin:6px 0}
.card ul{padding-left:18px;color:var(--mute);margin:0 0 16px}
.feature{border-color:rgba(34,211,238,.4);box-shadow:0 0 0 1px rgba(34,211,238,.15) inset,0 0 40px -12px rgba(34,211,238,.45)}
.note{font-size:.88rem;color:var(--mute);border-left:2px solid var(--orange);padding:8px 14px;background:rgba(251,146,60,.05);border-radius:0 10px 10px 0}
.prose{max-width:760px}.prose h1{font-size:clamp(2rem,4vw,2.8rem)}.prose h2{margin-top:2em}.prose p,.prose li{color:#c9d3ea}
.page-hero{padding:64px 0 16px}.page-hero h1{font-size:clamp(2rem,4.5vw,3rem);margin:14px 0 10px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.filters button{background:rgba(255,255,255,.03);border:1px solid var(--line);color:var(--mute);padding:7px 14px;border-radius:99px;cursor:pointer;font:inherit;font-size:.9rem}
.filters button[aria-pressed=true]{color:#02121a;background:var(--cyan);border-color:var(--cyan)}
footer{border-top:1px solid var(--line);margin-top:56px;padding:40px 0;color:var(--mute);font-size:.92rem}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}@media(max-width:760px){.fgrid{grid-template-columns:1fr 1fr}}
footer a{color:var(--mute);display:block;padding:2px 0}footer a:hover{color:var(--ink)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}.reveal.in{opacity:1;transform:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}
/* ---- Animated logo ("logo comes to life") ---- */
.logo-fx{position:relative;display:inline-block;flex:none;line-height:0;isolation:isolate;transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.logo-fx img{position:relative;z-index:1;display:block;filter:drop-shadow(0 0 8px rgba(34,211,238,.45));transition:filter .35s}
.brand .logo-fx img{width:40px;height:40px}
.logo-fx:before{content:"";position:absolute;inset:-30%;z-index:0;border-radius:50%;pointer-events:none;background:radial-gradient(circle,rgba(34,211,238,.55),rgba(59,130,246,.18) 45%,transparent 70%);opacity:.35;transform:scale(.85);animation:lfx-glow 4s ease-in-out infinite}
.logo-fx:after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(105deg,transparent 42%,rgba(255,255,255,.7) 50%,rgba(125,240,255,.4) 53%,transparent 58%) no-repeat;background-size:300% 100%;background-position:150% 0;-webkit-mask:url(/assets/arh-logo.png) center/contain no-repeat;mask:url(/assets/arh-logo.png) center/contain no-repeat;mix-blend-mode:screen;animation:lfx-sheen 7s ease-in-out infinite}
.logo-fx.f:after{animation-delay:2.5s}.logo-fx.f:before{animation-delay:1s}
.brand:hover .logo-fx,.brand:focus-visible .logo-fx{transform:translateY(-2px) scale(1.08)}
.brand:hover .logo-fx img,.brand:focus-visible .logo-fx img{filter:drop-shadow(0 0 14px rgba(34,211,238,.95)) brightness(1.12)}
.hero-logo:before{display:none}
.hero-logo:after{opacity:.6;animation-duration:8s;animation-delay:1.2s}
.orb:hover .hero-logo img{filter:drop-shadow(0 0 22px rgba(34,211,238,.8)) brightness(1.08)}
.orbit{position:absolute;border-radius:50%;pointer-events:none;border:1px solid rgba(34,211,238,.14)}
.orbit.o1{inset:3%;animation:spin 18s linear infinite}
.orbit.o2{inset:14%;border-color:rgba(74,222,128,.12);animation:spin 26s linear infinite reverse}
.orbit i{position:absolute;top:50%;left:50%;width:6px;height:6px;margin:-3px;border-radius:50%;background:#bff6ff;box-shadow:0 0 6px 2px rgba(34,211,238,.9),0 0 14px 4px rgba(34,211,238,.35)}
.orbit i:nth-child(1){transform:rotate(0deg) translateY(calc(min(380px,80vw)*-.47))}
.orbit i:nth-child(2){transform:rotate(130deg) translateY(calc(min(380px,80vw)*-.47));width:4px;height:4px;margin:-2px}
.orbit i:nth-child(3){transform:rotate(245deg) translateY(calc(min(380px,80vw)*-.47));background:#d9ffe6;box-shadow:0 0 6px 2px rgba(74,222,128,.85)}
.orbit.o2 i:nth-child(1){transform:rotate(60deg) translateY(calc(min(380px,80vw)*-.36));background:#ffe3c7;box-shadow:0 0 6px 2px rgba(251,146,60,.85)}
.orbit.o2 i:nth-child(2){transform:rotate(240deg) translateY(calc(min(380px,80vw)*-.36));width:4px;height:4px;margin:-2px}
@keyframes lfx-glow{0%,100%{opacity:.3;transform:scale(.85)}50%{opacity:.85;transform:scale(1.05)}}
@keyframes lfx-sheen{0%,62%{background-position:150% 0}86%,100%{background-position:-50% 0}}
@media(prefers-reduced-motion:reduce){.logo-fx:after{display:none}.logo-fx:before{opacity:.45;transform:none}.logo-fx{transition:none}}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}