:root{
  color-scheme:light dark;
  --page:#F3F7F5;
  --page-tint:#EAF1EE;
  --surface:#FBFDFC;
  --surface-strong:#FFFFFF;
  --surface-muted:#E7EFEC;
  --ink:#10231D;
  --ink-soft:#52645E;
  --ink-faint:#596D66;
  --line:#CBD9D4;
  --line-strong:#AFC2BB;
  --accent:#087B5B;
  --accent-strong:#055E46;
  --accent-soft:#D4EBE2;
  --warning:#8A5A10;
  --warning-soft:#F4E8CF;
  --radius:18px;
  --radius-small:11px;
  --maxw:1180px;
  --shadow:0 24px 70px rgba(30,69,56,.13);
  --font-ui:"Segoe UI Variable","Aptos","Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  min-width:320px;margin:0;
  background:radial-gradient(circle at 9% 2%,rgba(8,123,91,.08),transparent 32rem),var(--page);
  color:var(--ink);font-family:var(--font-ui);line-height:1.7
}
img{max-width:100%}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:4px}
a:hover{color:var(--accent-strong)}
.container{width:min(100%,var(--maxw));margin-inline:auto;padding-inline:clamp(18px,4vw,46px)}
.skip-link{position:fixed;left:18px;top:12px;z-index:10;transform:translateY(-180%);padding:10px 14px;border-radius:var(--radius-small);background:var(--ink);color:var(--surface);font-weight:700}
.skip-link:focus{transform:none}
.site-header{height:72px;border-bottom:1px solid color-mix(in srgb,var(--line) 78%,transparent);background:color-mix(in srgb,var(--page) 88%,transparent);backdrop-filter:blur(16px) saturate(130%)}
.site-header .container{height:100%;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-size:.98rem;font-weight:700;letter-spacing:-.025em;text-decoration:none;white-space:nowrap}
.brand-badge{width:38px;height:38px;display:grid;place-items:center;border-radius:12px;background:var(--ink);color:var(--surface);font:700 .68rem/1 var(--font-mono);letter-spacing:-.05em}
.site-nav{display:flex;align-items:center;gap:clamp(14px,2.2vw,28px);margin-left:auto}
.site-nav a{color:var(--ink-soft);font-size:.84rem;font-weight:650;text-decoration:none;white-space:nowrap}
.site-nav a:hover{color:var(--ink)}
.header-cta{padding:9px 14px;border-radius:var(--radius-small);background:var(--ink);color:var(--surface)!important}
.breadcrumb{padding-top:28px;color:var(--ink-faint);font-size:.8rem}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0;padding:0;list-style:none}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--line-strong)}
.breadcrumb a{color:var(--ink-soft)}
.guide-hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(290px,.65fr);gap:clamp(30px,6vw,78px);align-items:end;padding:clamp(36px,5vw,58px) 0 clamp(56px,7vw,82px)}
.hero-copy{align-self:center}
.eyebrow{margin:0 0 20px;color:var(--accent);font:700 .72rem/1 var(--font-mono);letter-spacing:.1em;text-transform:uppercase}
h1{max-width:18ch;margin:0;font-size:clamp(3rem,5.5vw,5.1rem);font-weight:760;letter-spacing:-.065em;line-height:.92;text-wrap:balance}
.lede{max-width:48ch;margin:26px 0 0;color:var(--ink-soft);font-size:clamp(1.02rem,1.4vw,1.18rem);line-height:1.65;text-wrap:pretty}
.hero-aside{overflow:hidden;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.hero-aside img{display:block;width:100%;height:clamp(250px,28vw,350px);object-fit:cover;object-position:58% center}
.fact{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:22px}
.fact strong{font:760 2rem/1 var(--font-ui);letter-spacing:-.06em;color:var(--accent)}
.fact span{color:var(--ink-soft);font-size:.85rem;line-height:1.5}
.article-layout{display:grid;grid-template-columns:minmax(220px,.42fr) minmax(0,1fr);gap:clamp(38px,7vw,92px);align-items:start;padding-bottom:clamp(84px,10vw,132px)}
.guide-nav{padding:25px 0;border-top:1px solid var(--line)}
.guide-nav p{margin:0 0 14px;color:var(--ink);font-size:.78rem;font-weight:750;text-transform:uppercase;letter-spacing:.08em}
.guide-nav ol{margin:0;padding-left:19px;color:var(--ink-faint)}
.guide-nav li{margin:9px 0;padding-left:5px}
.guide-nav a{color:var(--ink-soft);font-size:.9rem}
.guide-body{min-width:0}
.guide-body section{padding:0 0 clamp(58px,7vw,84px)}
.guide-body h2{max-width:17ch;margin:0 0 22px;font-size:clamp(2.15rem,4vw,3.75rem);font-weight:730;letter-spacing:-.055em;line-height:1.02;text-wrap:balance}
.guide-body h3{margin:32px 0 12px;font-size:1.25rem;letter-spacing:-.025em}
.guide-body p,.guide-body li{color:var(--ink-soft)}
.guide-body p{max-width:72ch;margin:0 0 19px}
.guide-body b,.guide-body strong{color:var(--ink)}
.guide-body ul,.guide-body ol{max-width:70ch;margin:18px 0 0;padding-left:21px}
.guide-body li{margin:11px 0;padding-left:6px}
.answer-block{margin:30px 0;padding:clamp(25px,4vw,42px);border-radius:var(--radius);background:var(--ink);color:color-mix(in srgb,var(--surface) 80%,transparent)}
.answer-block strong{display:block;margin-bottom:10px;color:#91E2C5;font-size:1.3rem;line-height:1.25}
.answer-block p{margin:0;color:inherit}
.compare{display:grid;grid-template-columns:1.1fr .9fr;gap:1px;margin:28px 0;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:var(--line)}
.compare>div{padding:24px;background:var(--surface)}
.compare h3{margin:0 0 10px;font-size:1.05rem}
.compare p{margin:0;font-size:.91rem}
.number-list{counter-reset:item;display:grid;gap:1px;margin:28px 0;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:var(--line)}
.number-list>div{position:relative;padding:25px 25px 25px 76px;background:var(--surface)}
.number-list>div::before{counter-increment:item;content:counter(item);position:absolute;left:25px;top:27px;width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:var(--accent-soft);color:var(--accent-strong);font:700 .82rem/1 var(--font-mono)}
.number-list h3{margin:0 0 8px;font-size:1.06rem}
.number-list p{margin:0;font-size:.92rem}
.note{margin:25px 0;padding:18px 20px;border-left:4px solid var(--accent);background:var(--accent-soft);color:var(--accent-strong);font-size:.92rem}
.note.warning{border-color:var(--warning);background:var(--warning-soft);color:var(--warning)}
.source-list{padding-top:28px!important;border-top:1px solid var(--line)}
.source-list h2{font-size:1.5rem;letter-spacing:-.025em}
.source-list li{font-size:.9rem}
.cluster{padding:clamp(62px,8vw,94px) 0;background:var(--page-tint);border-top:1px solid var(--line)}
.cluster-head{max-width:700px;margin-bottom:32px}
.cluster h2{margin:0 0 14px;font-size:clamp(2.2rem,4vw,3.8rem);letter-spacing:-.055em;line-height:1}
.cluster-head p{margin:0;color:var(--ink-soft)}
.cluster-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:14px}
.cluster-card{min-height:180px;display:flex;flex-direction:column;justify-content:space-between;padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--ink);text-decoration:none;transition:transform .2s ease,border-color .2s ease}
.cluster-card:hover{transform:translateY(-2px);border-color:var(--accent)}
.cluster-card:nth-child(3n){grid-column:1/-1;min-height:140px}
.cluster-card span{color:var(--ink-faint);font:700 .7rem/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase}
.cluster-card strong{max-width:23ch;font-size:1.18rem;line-height:1.3}
.calculator-cta{padding:clamp(60px,8vw,94px) 0;background:var(--ink);color:var(--surface)}
.calculator-cta .container{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}
.calculator-cta h2{max-width:16ch;margin:0;font-size:clamp(2.35rem,4vw,4rem);letter-spacing:-.06em;line-height:1}
.calculator-cta p{max-width:55ch;margin:18px 0 0;color:color-mix(in srgb,var(--surface) 68%,transparent)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 20px;border-radius:var(--radius-small);background:#91E2C5;color:#0B2019;text-decoration:none;font-weight:760;white-space:nowrap}
.button:hover{background:#B0EBD6;color:#0B2019}
footer{padding:32px 0 42px;background:#08100D;color:#8FA39B;font-size:.82rem}
footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a{color:#B7D2C8}
:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 42%,transparent);outline-offset:3px}
@media (prefers-color-scheme:dark){
  :root{--page:#0E1714;--page-tint:#14221D;--surface:#16241F;--surface-strong:#1B2B25;--surface-muted:#21332C;--ink:#EDF6F2;--ink-soft:#A7BBB3;--ink-faint:#82988F;--line:#30463E;--line-strong:#455E54;--accent:#67D6AD;--accent-strong:#91E2C5;--accent-soft:#173D31;--warning:#E8B55F;--warning-soft:#3B2E18;--shadow:0 28px 80px rgba(0,0,0,.3)}
}
@media (max-width:840px){
  .site-nav a:not(.header-cta){display:none}
  .guide-hero,.article-layout{grid-template-columns:1fr}
  .guide-hero{padding-top:46px}
  .hero-aside{max-width:600px}
  .guide-nav{display:none}
  .calculator-cta .container{grid-template-columns:1fr;align-items:start}
}
@media (max-width:600px){
  .site-header{height:64px}
  .brand{font-size:.88rem}
  .brand-badge{width:34px;height:34px}
  .header-cta{padding:8px 10px;font-size:.78rem}
  h1{font-size:clamp(2.8rem,14vw,4rem)}
  .guide-hero{padding-bottom:74px}
  .compare,.cluster-grid{grid-template-columns:1fr}
  .cluster-card:nth-child(3n){grid-column:auto}
  .number-list>div{padding-left:66px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}