:root{
  --ink:#071d1d;--ink-2:#163334;--paper:#f5faf7;--paper-2:#eaf4ef;--white:#fff;
  --mint:#00d7a3;--lime:#dfff57;--teal:#087d73;--line:#cfe0d8;--muted:#5f7270;
  --shadow:0 20px 55px rgba(5,34,32,.11);--radius:24px;--radius-sm:15px;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:"Avenir Next",Avenir,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.62;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:3px}
img{max-width:100%}
button,input,select{font:inherit}
button{cursor:pointer}
.shell{width:min(1160px,calc(100% - 32px));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:12px;top:-80px;background:var(--lime);color:var(--ink);padding:10px 14px;border-radius:10px;z-index:100}
.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,250,247,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(7,29,29,.08)}
.nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:-.025em}
.brand img{border-radius:11px}
.site-nav{display:flex;gap:28px;align-items:center}
.site-nav a{text-decoration:none;font-weight:650;color:var(--ink-2);font-size:.95rem}
.site-nav a:hover{color:var(--teal)}
.nav-toggle{display:none;border:0;background:none;padding:10px}
.nav-toggle span:not(.sr-only){display:block;width:24px;height:2px;background:var(--ink);margin:5px;border-radius:2px}
.hero{position:relative;overflow:hidden;background:var(--ink);color:white;padding:88px 0 76px}
.hero:before{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(223,255,87,.18);border-radius:50%;right:-120px;top:-270px;box-shadow:0 0 0 60px rgba(0,215,163,.04),0 0 0 120px rgba(223,255,87,.025)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.kicker,.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.75rem;font-weight:850}
.kicker{color:var(--lime)}
.hero h1,.page-hero h1,.article-hero h1{font-family:var(--serif);font-weight:700;letter-spacing:-.045em;line-height:.98;margin:.15em 0 .4em}
.hero h1{font-size:clamp(3rem,7vw,6.4rem);max-width:760px}
.hero p{font-size:1.14rem;color:#cde0db;max-width:660px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;text-decoration:none;border:1px solid transparent;border-radius:999px;padding:13px 20px;font-weight:800;transition:.2s ease}
.btn-primary{background:var(--lime);color:var(--ink)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(223,255,87,.18)}
.btn-secondary{border-color:#47615e;color:white}
.btn-secondary:hover{background:#123132}
.metric-stack{display:grid;gap:12px}
.metric{padding:20px;border:1px solid rgba(255,255,255,.13);border-radius:18px;background:rgba(255,255,255,.055);display:flex;justify-content:space-between;gap:20px}
.metric strong{font-family:var(--serif);font-size:1.65rem;color:var(--lime)}
.metric span{color:#bcd0ca}
.section{padding:76px 0}
.section-tight{padding:48px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:28px}
.section-head h2,.content h2{font-family:var(--serif);font-size:clamp(2rem,4vw,3.4rem);line-height:1.05;letter-spacing:-.035em;margin:0}
.section-head p{max-width:580px;color:var(--muted);margin:0}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tool-card{display:flex;flex-direction:column;min-height:250px;padding:24px;border:1px solid var(--line);border-radius:22px;background:var(--white);text-decoration:none;transition:.2s ease;position:relative;overflow:hidden}
.tool-card:after{content:"↗";position:absolute;right:18px;top:16px;font-size:1.2rem;opacity:.4}
.tool-card:hover{transform:translateY(-4px);border-color:#94bfb1;box-shadow:var(--shadow)}
.tool-icon{width:46px;height:46px;border-radius:15px;background:var(--paper-2);display:grid;place-items:center;font-size:1.35rem;margin-bottom:34px}
.tool-card h3{font-size:1.2rem;margin:0 0 8px}
.tool-card p{color:var(--muted);margin:0}
.tool-card .tag{margin-top:auto;padding-top:20px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--teal)}
.band{background:var(--paper-2);border-block:1px solid var(--line)}
.formula-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.formula-card{background:var(--ink);color:white;padding:32px;border-radius:var(--radius)}
.formula-card .formula{display:block;font-family:var(--serif);font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.2;color:var(--lime);margin:18px 0}
.formula-card p{color:#c6d8d3}
.page-hero{padding:58px 0 38px}
.page-hero h1,.article-hero h1{font-size:clamp(2.7rem,6vw,5.6rem);max-width:900px}
.page-hero p,.article-hero p{font-size:1.12rem;color:var(--muted);max-width:760px}
.breadcrumbs{font-size:.82rem;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.breadcrumbs a{text-decoration:none}
.calculator-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.65fr);gap:28px;align-items:start}
.calculator-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.calc-head h2{font-family:var(--serif);font-size:2rem;margin:4px 0}
.calc-head p{color:var(--muted);margin:0 0 20px}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field-grid label{display:block;font-weight:750;font-size:.86rem}
.field-grid label>span:first-child{display:block;margin-bottom:6px}
input,select{width:100%;border:1px solid #bdd2c9;border-radius:12px;background:#fbfdfc;color:var(--ink);padding:12px 13px;outline:none}
input:focus,select:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,215,163,.12)}
.input-unit{display:flex;align-items:center;border:1px solid #bdd2c9;border-radius:12px;background:#fbfdfc;overflow:hidden}
.input-unit:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,215,163,.12)}
.input-unit input{border:0;border-radius:0;background:transparent;box-shadow:none!important}
.input-unit b{font-size:.78rem;color:var(--muted);padding-right:12px;white-space:nowrap}
.result-panel{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;background:var(--ink);border-radius:18px;padding:10px;margin-top:22px;color:white}
.result-panel>div{padding:15px}
.result-panel span,.result-panel small{display:block;color:#afc6c0;font-size:.74rem}
.result-panel strong{display:block;font-family:var(--serif);font-size:1.55rem;color:var(--lime);margin:2px 0}
.calc-note{font-size:.78rem;color:var(--muted);margin:14px 0 0}
.aside-card{background:var(--paper-2);border:1px solid var(--line);border-radius:22px;padding:24px}
.aside-card h2,.aside-card h3{font-family:var(--serif);margin-top:0}
.aside-card ul{padding-left:20px}
.aside-card li+li{margin-top:8px}
.content{max-width:800px}
.content p,.content li{color:#344d4b}
.content h2{font-size:2.1rem;margin-top:2em}
.content h3{font-size:1.22rem;margin-top:1.8em}
.content table{width:100%;border-collapse:collapse;background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:table}
.content th,.content td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
.content th{background:var(--paper-2)}
.callout{border-left:5px solid var(--mint);padding:18px 20px;background:#edf8f3;border-radius:0 16px 16px 0;margin:26px 0}
.faq details{border-top:1px solid var(--line);padding:17px 0}
.faq summary{font-weight:800;cursor:pointer}
.faq details p{margin-bottom:0}
.country-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.country-card{padding:20px;border-radius:18px;border:1px solid var(--line);background:white;text-decoration:none}
.country-card strong{display:block;margin-bottom:4px}
.country-card span{font-size:.86rem;color:var(--muted)}
.search-panel{background:white;border:1px solid var(--line);border-radius:22px;padding:18px;display:flex;gap:10px;margin-bottom:28px}
.search-panel input{flex:1}
.search-panel button{border:0;border-radius:12px;padding:0 18px;background:var(--ink);color:white;font-weight:800}
.empty-state{display:none;padding:30px;border:1px dashed var(--line);border-radius:18px;text-align:center;color:var(--muted)}
.article-hero{padding:58px 0 24px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.86rem}
.prose-layout{display:grid;grid-template-columns:minmax(0,800px) 260px;gap:60px;align-items:start}
.toc{position:sticky;top:100px}
.toc h2{font-family:var(--serif);font-size:1.25rem}
.toc a{display:block;text-decoration:none;color:var(--muted);padding:5px 0}
.toc a:hover{color:var(--teal)}
.site-footer{background:var(--ink);color:white;margin-top:70px;padding:54px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}
.footer-grid p{color:#a9c0bb;max-width:420px}
.footer-grid h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--lime)}
.footer-grid>div>a:not(.brand){display:block;text-decoration:none;color:#c5d7d2;margin:8px 0}
.footer-bottom{border-top:1px solid #254240;margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#91aaa4;font-size:.8rem}
.ad-slot{display:none}
.notice{font-size:.84rem;padding:14px 16px;border:1px solid var(--line);background:white;border-radius:14px}
.kpi-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.kpi{padding:20px;background:white;border:1px solid var(--line);border-radius:18px}
.kpi strong{font-family:var(--serif);font-size:1.5rem;display:block}
.cta-box{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;background:var(--ink);color:white;padding:34px;border-radius:26px}
.cta-box h2{font-family:var(--serif);font-size:2rem;margin:0}
.cta-box p{color:#bed1cc;margin:.4em 0 0}
@media(max-width:900px){
  .hero-grid,.calculator-layout,.prose-layout{grid-template-columns:1fr}
  .tool-grid{grid-template-columns:1fr 1fr}
  .country-grid{grid-template-columns:1fr 1fr}
  .toc{position:static}
}
@media(max-width:700px){
  .nav-wrap{height:66px}.nav-toggle{display:block}.site-nav{display:none;position:absolute;left:16px;right:16px;top:62px;background:white;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:12px;flex-direction:column;align-items:stretch;gap:0}
  .site-nav.open{display:flex}.site-nav a{padding:12px}
  .hero{padding:58px 0}.hero-grid{gap:34px}
  .tool-grid,.formula-grid,.field-grid,.result-panel,.country-grid,.kpi-row,.footer-grid{grid-template-columns:1fr}
  .section{padding:54px 0}.section-head{display:block}.section-head p{margin-top:10px}
  .calculator-card{padding:20px}.result-panel>div{padding:12px}
  .footer-bottom{flex-direction:column}.cta-box{grid-template-columns:1fr}
  .search-panel{flex-direction:column}.search-panel button{padding:12px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}