*,*::before,*::after{box-sizing:border-box}
:root{--r:16px}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--body),system-ui,sans-serif;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.04;z-index:0;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
body>*{position:relative;z-index:1}
a{color:var(--accent);text-underline-offset:3px}
h1,h2,h3{font-family:var(--head),Georgia,serif;line-height:1.08;letter-spacing:-.02em;text-wrap:balance;margin:0 0 .5em}
h1{font-size:clamp(2.3rem,5.4vw,4.4rem);letter-spacing:-.035em}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.2rem}
p{text-wrap:pretty;max-width:68ch;margin:0 0 1em}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:99}
header.top{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--bg) 84%,transparent);backdrop-filter:blur(12px) saturate(1.3);border-bottom:1px solid color-mix(in oklab,var(--ink) 9%,transparent)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--head);font-weight:700;font-size:1.12rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.logo svg{flex:none}
nav.main{display:flex;gap:22px;align-items:center}
nav.main a{color:var(--muted);text-decoration:none;font-weight:500;font-size:.95rem;transition:color .2s}
nav.main a:hover,nav.main a[aria-current]{color:var(--ink)}
nav.main a[aria-current]{box-shadow:inset 0 -2px 0 var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;border:0;border-radius:999px;padding:13px 22px;font:600 .98rem var(--body);text-decoration:none;cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s;box-shadow:0 10px 24px -12px var(--accent)}
.btn:hover{transform:translateY(-1px);box-shadow:0 16px 30px -14px var(--accent)}
.btn:active{transform:translateY(1px) scale(.99)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px color-mix(in oklab,var(--ink) 25%,transparent)}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px}
.menu-btn{display:none}
@media(max-width:820px){nav.main{display:none}nav.main.open{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:flex-start;background:var(--bg);padding:16px 24px 24px;border-bottom:1px solid color-mix(in oklab,var(--ink) 10%,transparent)}.menu-btn{display:inline-flex;background:none;border:1px solid color-mix(in oklab,var(--ink) 20%,transparent);border-radius:10px;padding:8px 12px;font:600 .9rem var(--body);color:var(--ink);min-height:44px}}
.hero{padding:72px 0 40px;background:radial-gradient(900px 420px at 90% -10%,color-mix(in oklab,var(--accent) 16%,transparent),transparent 65%)}
.eyebrow{display:inline-block;font:600 .8rem/1 var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--accent);background:var(--accent2);padding:7px 11px;border-radius:999px;margin-bottom:18px}
.lede{font-size:1.18rem;color:var(--muted);max-width:56ch}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:start}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:32px}.hero{padding-top:44px}}
.layout-stack .hero-grid,.layout-editorial .hero-grid{grid-template-columns:1fr}
.layout-stack .hero-copy,.layout-editorial .hero-copy{max-width:820px}
.layout-bold h1{font-size:clamp(2.8rem,7vw,5.6rem);text-transform:uppercase;line-height:.95;letter-spacing:-.01em}
.layout-editorial h1{font-weight:400;font-size:clamp(2.6rem,6vw,5rem)}
.layout-editorial h2{font-weight:400}
.layout-dash .calc{font-family:var(--body)}
.layout-dash .total{font-family:'IBM Plex Mono',ui-monospace,monospace}
.facts{display:flex;flex-wrap:wrap;gap:28px;margin-top:28px;padding:0;list-style:none}
.facts li{border-left:2px solid var(--accent);padding-left:12px;color:var(--muted);font-size:.95rem}
.facts b{display:block;color:var(--ink);font-size:1.25rem;font-family:var(--head)}
.calc{background:var(--surface);border-radius:22px;padding:28px;box-shadow:0 1px 0 #fff inset,0 30px 60px -36px color-mix(in oklab,var(--ink) 45%,transparent),0 0 0 1px color-mix(in oklab,var(--ink) 7%,transparent)}
.calc h2{font-size:1.4rem}
.field{margin-bottom:18px}
.field label,.field .lbl{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.field small{color:var(--muted);font-weight:400}
input[type=number],input[type=text],input[type=email],select,textarea{width:100%;font:500 1rem var(--body);color:var(--ink);background:var(--bg);border:1.5px solid color-mix(in oklab,var(--ink) 14%,transparent);border-radius:12px;padding:12px 14px;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in oklab,var(--accent) 18%,transparent)}
input[type=range]{width:100%;accent-color:var(--accent)}
.opts{display:grid;gap:8px}
.field label.opt{font-weight:400;display:flex;margin:0}
.layout-stack .calc,.layout-editorial .calc{display:grid;grid-template-columns:1fr 1fr;gap:0 36px;max-width:1000px}
.layout-stack .calc>h2,.layout-editorial .calc>h2,.layout-stack .calc>p,.layout-editorial .calc>p{grid-column:1/-1}
.layout-stack .calc .result,.layout-editorial .calc .result{grid-column:2;grid-row:2/span 3;margin-top:0;align-self:start;position:sticky;top:90px}
@media(max-width:860px){.layout-stack .calc,.layout-editorial .calc{display:block}}
.opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:12px;background:var(--bg);cursor:pointer;font-size:.94rem;line-height:1.35;transition:background .2s}
.opt:hover{background:var(--accent2)}
.opt input{margin-top:3px;accent-color:var(--accent);width:18px;height:18px;flex:none}
.opt span.p{margin-left:auto;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:.85rem}
.mods{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.mods{grid-template-columns:1fr}.calc{padding:20px}}
.result{margin-top:20px;padding:20px;border-radius:16px;background:var(--ink);color:var(--bg)}
.result .total{font:700 clamp(1.8rem,4vw,2.4rem)/1.1 var(--head);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.result small{opacity:.75}
.result ul{margin:12px 0 0;padding:0;list-style:none;font-size:.88rem}
.result li{display:flex;justify-content:space-between;gap:12px;padding:5px 0;border-top:1px solid rgba(255,255,255,.12);font-variant-numeric:tabular-nums}
.result ol{margin:10px 0 0 18px;padding:0}
section.block{padding:72px 0}
.zig{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
@media(max-width:860px){.zig{grid-template-columns:1fr;gap:20px}}
.guide-list{display:grid;gap:0;border-top:1px solid color-mix(in oklab,var(--ink) 12%,transparent)}
.guide-list a{display:grid;grid-template-columns:1fr auto;gap:16px;padding:22px 4px;border-bottom:1px solid color-mix(in oklab,var(--ink) 12%,transparent);text-decoration:none;color:var(--ink);transition:padding .25s,background .25s}
.guide-list a:hover{padding-left:14px;background:color-mix(in oklab,var(--accent2) 50%,transparent)}
.guide-list b{font-family:var(--head);font-size:1.25rem;font-weight:600}
.guide-list span{display:block;color:var(--muted);font-size:.95rem}
.guide-list i{font-style:normal;color:var(--accent);font-size:1.4rem;align-self:center}
.lead{background:var(--accent2);border-radius:28px;padding:44px;display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media(max-width:860px){.lead{grid-template-columns:1fr;padding:26px}}
.lead form{display:grid;gap:12px}
.lead .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.lead .row{grid-template-columns:1fr}}
.hp{position:absolute;left:-5000px}
.msg{font-weight:600;min-height:1.4em}
.msg.err{color:#a1281b}
article.guide{padding:56px 0 24px}
article.guide .body{max-width:760px}
article.guide h2{margin-top:1.6em}
table{width:100%;border-collapse:collapse;margin:8px 0 24px;font-size:.95rem;font-variant-numeric:tabular-nums;background:var(--surface);border-radius:14px;overflow:hidden;box-shadow:0 0 0 1px color-mix(in oklab,var(--ink) 9%,transparent)}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid color-mix(in oklab,var(--ink) 8%,transparent);vertical-align:top}
th{background:var(--accent2);font-weight:600}
.tablewrap{overflow-x:auto}
ul.check{padding-left:0;list-style:none}
ul.check li{padding:8px 0 8px 30px;position:relative;border-bottom:1px dashed color-mix(in oklab,var(--ink) 12%,transparent)}
ul.check li::before{content:"";position:absolute;left:4px;top:15px;width:12px;height:7px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:16px}.crumbs a{color:var(--muted)}
.note{font-size:.9rem;color:var(--muted);border-left:3px solid var(--accent);padding-left:14px;margin:28px 0}
details{border-bottom:1px solid color-mix(in oklab,var(--ink) 12%,transparent);padding:16px 0}
details summary{cursor:pointer;font-weight:600;font-size:1.08rem;list-style:none;display:flex;justify-content:space-between;gap:12px}
details summary::after{content:"+";color:var(--accent);font-size:1.4rem;line-height:1;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:10px 0 0;color:var(--muted)}
footer.site{margin-top:64px;background:var(--ink);color:color-mix(in oklab,var(--bg) 78%,transparent);padding:56px 0 36px;font-size:.93rem}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
@media(max-width:760px){footer.site .cols{grid-template-columns:1fr}}
footer.site a{color:var(--bg);text-decoration:none;opacity:.85}footer.site a:hover{opacity:1;text-decoration:underline}
footer.site h3{color:var(--bg);font-size:1rem;font-family:var(--body);letter-spacing:0}
footer.site ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
footer.site .legal{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:.85rem}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{header.top,footer.site,.lead,body::before{display:none}}