:root{color-scheme:dark;--bg:#000;--card:#0e0e0e;--ink:#f5f5f7;--mut:#86868b;--line:#333336;--acc:#0071e3;--link:#2997ff;--r:20px;--ease:cubic-bezier(.2,.7,.2,1)}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 -apple-system,"SF Pro Display","Inter",system-ui,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
.progress{position:fixed;inset:0 0 auto 0;height:2px;background:var(--link);transform:scaleX(0);transform-origin:left;z-index:60}
.top{position:sticky;top:0;z-index:50;background:rgba(0,0,0,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(255,255,255,.08)}
.bar{display:flex;align-items:center;justify-content:space-between;height:52px}
.logo{font-weight:600;font-size:1.05rem;color:var(--ink);display:flex;align-items:center;gap:8px;letter-spacing:-.01em}.logo:hover{text-decoration:none}
.logo .mark{display:grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--acc);color:#fff;font-weight:700;font-size:.9rem}
.logo .dot{color:var(--mut);font-weight:500;margin-left:-6px}
nav a{margin-left:22px;color:#d2d2d7;font-size:.85rem}nav a:hover{color:#fff;text-decoration:none}
h1{font-size:clamp(2rem,5.5vw,3.4rem);line-height:1.08;margin:.3em 0;letter-spacing:-.03em;font-weight:600}
h2{font-size:clamp(1.4rem,3vw,1.9rem);margin:1.8em 0 .5em;letter-spacing:-.02em;font-weight:600}
.lead{color:var(--mut);font-size:1.15rem;max-width:60ch}
.hero{text-align:center;padding:120px 0 90px;background:radial-gradient(800px 380px at 50% 0,#0a2a5a66,transparent 70%)}
.hero h1{font-size:clamp(2.6rem,9vw,5.8rem);line-height:1.02;letter-spacing:-.04em;margin:0 0 .3em}
.hero em{font-style:normal;background:linear-gradient(90deg,#2997ff,#9ec5ff 60%,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin:0 auto 32px;font-size:clamp(1.05rem,2.4vw,1.4rem)}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:12px 26px;border-radius:980px;font-weight:500;transition:background .2s,transform .2s}
.btn:hover{background:#0077ed;text-decoration:none;transform:scale(1.03)}
.cat{margin-top:2.4em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.card{display:flex;flex-direction:column;gap:6px;min-height:130px;background:linear-gradient(#1d1d1f,#0b0b0c 75%);border:1px solid var(--line);border-radius:var(--r);padding:22px;color:var(--ink);transition:border-color .3s,transform .4s var(--ease),box-shadow .4s}
.card strong{font-weight:600;font-size:1.1rem;letter-spacing:-.01em}.card:hover{text-decoration:none;border-color:#4a6fa5;transform:translateY(-5px);box-shadow:0 18px 50px -20px #0071e3aa}
.card span,.card small{color:var(--mut);font-size:.9rem}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;margin:90px 0 20px;padding:60px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps b{display:block;font-size:3.2rem;font-weight:600;letter-spacing:-.04em;color:var(--link)}.steps h3{margin:.2em 0;font-size:1.25rem;font-weight:600}.steps p{color:var(--mut);margin:0}
.page{padding-bottom:40px}.crumbs{color:var(--mut);font-size:.85rem;margin:26px 0 0}.crumbs a{color:var(--mut)}
.calc{display:grid;grid-template-columns:1fr 1fr;gap:24px;background:linear-gradient(#1d1d1f,#0b0b0c 80%);border:1px solid var(--line);border-radius:28px;padding:28px;margin:26px 0;box-shadow:0 40px 90px -50px #0071e3}
@media(max-width:720px){.calc{grid-template-columns:1fr;padding:20px}}
.inputs{display:grid;gap:16px;align-content:start}
label{display:grid;gap:7px;font-weight:500;font-size:.88rem;color:#d2d2d7}
input,select{font:inherit;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#000;color:var(--ink);width:100%;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus{outline:0;border-color:var(--link);box-shadow:0 0 0 4px #2997ff33}
.results{background:#000;border:1px solid var(--line);border-radius:20px;padding:22px;display:grid;gap:12px;align-content:start}
.row{display:flex;justify-content:space-between;gap:12px;align-items:baseline;border-bottom:1px solid var(--line);padding-bottom:10px}
.row:last-child{border:0;padding:0}.row span{color:var(--mut);font-size:.92rem}.row b{font-variant-numeric:tabular-nums;font-weight:600}
.row.big{display:block;border:0}.row.big span{display:block}.row.big b{font-size:clamp(2.2rem,6vw,3.2rem);letter-spacing:-.03em;background:linear-gradient(90deg,#fff,#9ec5ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.prose{max-width:68ch}.prose li{margin:.3em 0}.prose p,.prose li{color:#d2d2d7}
details{background:#0e0e0e;border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin:10px 0;transition:border-color .2s}details[open]{border-color:#4a6fa5}summary{cursor:pointer;font-weight:500}
.upd{color:var(--mut);font-size:.85rem}
.ad-box{margin:28px 0;text-align:center}.ad-box span{display:block;font-size:.7rem;color:var(--mut);text-transform:uppercase;letter-spacing:.08em}
.ad{display:block;min-height:90px}
.foot{border-top:1px solid var(--line);padding:28px 0;color:var(--mut);font-size:.85rem;margin-top:60px}.foot a{color:var(--mut)}
.js [data-reveal]{opacity:0;transform:translateY(32px);transition:opacity .9s var(--ease),transform .9s var(--ease);transition-delay:var(--d,0s)}
.js [data-reveal].in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.js [data-reveal]{opacity:1;transform:none;transition:none}.card,.btn{transition:none}}