:root {
  --bg:#fff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --line-dark:#d1d5db;
  --soft:#f8fafc;
  --accent:#111827;
  --ok:#047857;
  --warn:#b45309;
  --bad:#b91c1c;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;font-weight:400}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}
.top-nav{max-width:1420px;margin:0 auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{font-size:18px;letter-spacing:-.02em;font-weight:500;white-space:nowrap}
.nav-links{display:flex;gap:22px;flex-wrap:wrap;font-size:14px;color:var(--muted);align-items:center}
.nav-links a.current{color:var(--text)}
.nav-toggle{display:none;appearance:none;border:1px solid var(--line-dark);background:#fff;color:var(--text);padding:9px 12px;font:inherit;cursor:pointer;border-radius:0}
.page-shell{max-width:1420px;margin:0 auto;display:grid;grid-template-columns:280px minmax(0,1fr);gap:0}
.calculator-sidebar{border-right:1px solid var(--line);background:#fff;min-height:calc(100vh - 58px)}
.sidebar-inner{position:sticky;top:58px;padding:26px 22px;max-height:calc(100vh - 58px);overflow:auto}
.sidebar-title{font-size:14px;color:var(--muted);margin-bottom:22px;letter-spacing:.01em}
.sidebar-group{margin:0 0 24px}
.sidebar-group h2{font-size:14px;line-height:1.3;letter-spacing:0;font-weight:500;margin:0 0 10px;color:var(--text)}
.sidebar-group nav{display:grid;gap:7px}
.sidebar-group a{display:block;font-size:14px;color:var(--muted);padding:3px 0;border-left:2px solid transparent;padding-left:10px}
.sidebar-group a.active,.sidebar-group a:hover{color:var(--text);border-left-color:var(--accent);text-decoration:none}
.site-main{min-width:0}
.hero{padding:68px 40px 44px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:14px;color:var(--muted);margin-bottom:18px}
h1{font-size:clamp(34px,5vw,66px);line-height:1;letter-spacing:-.055em;margin:0 0 22px;font-weight:500;max-width:980px}
.hero p,.lead{max-width:780px;font-size:18px;color:var(--muted);margin:0}
.container{padding:40px;max-width:1180px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}
.section-head.compact{margin-bottom:18px}
h2{font-size:27px;line-height:1.15;letter-spacing:-.035em;font-weight:500;margin:0 0 12px}
h3{font-size:20px;line-height:1.25;letter-spacing:-.025em;font-weight:500;margin:0 0 8px}
p{margin:0 0 16px}.muted{color:var(--muted)}
.grid{display:grid;gap:18px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{border:1px solid var(--line);background:#fff;padding:22px;min-height:160px}.card:hover{border-color:var(--line-dark);text-decoration:none}.calculator-card{min-height:150px}
.card .tag,.tag{display:inline-block;border:1px solid var(--line);color:var(--muted);font-size:12px;padding:3px 7px;margin-bottom:14px;background:var(--soft)}
.card-title{font-size:21px;line-height:1.15;letter-spacing:-.025em;font-weight:500;margin-bottom:8px}.card-text{color:var(--muted);font-size:15px}
.category-card{min-height:0}.category-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:10px}.category-icon{width:38px;height:38px;flex:0 0 38px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}.category-icon svg{width:24px;height:24px;fill:none;stroke:var(--text);stroke-width:2;stroke-linecap:square;stroke-linejoin:miter}
.featured-calculator{border-bottom:1px solid var(--line);max-width:none}.calculator-layout{display:grid;grid-template-columns:minmax(0,1fr)360px;gap:24px;align-items:start}.panel{border:1px solid var(--line);background:#fff;padding:24px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.input-wrap{display:flex;align-items:center;border:1px solid var(--line-dark);background:#fff}.input-wrap input,.input-wrap select{width:100%;border:0;padding:12px 10px;font:inherit;color:var(--text);background:transparent;min-width:0}.input-wrap input:focus,.input-wrap select:focus{outline:1px solid var(--accent);outline-offset:-1px}.unit{color:var(--muted);font-size:13px;padding-right:10px;white-space:nowrap}.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.button,button{appearance:none;border:1px solid var(--accent);background:var(--accent);color:#fff;padding:11px 15px;font:inherit;cursor:pointer;border-radius:0}.button.secondary,button.secondary{background:#fff;color:var(--accent);border-color:var(--line-dark)}.button:hover,button:hover{text-decoration:none;opacity:.92}.result-box{border:1px solid var(--line);padding:18px;margin-top:10px;background:var(--soft)}.result-row{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding:10px 0}.result-row:last-child{border-bottom:0}.result-label{color:var(--muted)}.result-value{text-align:right;font-weight:500}.note{border-left:2px solid var(--accent);padding:12px 0 12px 16px;color:var(--muted);margin-top:18px}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:24px}.content-section{border-top:1px solid var(--line);padding-top:28px;margin-top:34px}.content-section ul{margin:10px 0 0;padding-left:20px;color:var(--muted)}.search-row{display:flex;gap:12px;margin:18px 0 24px}.search-row input{flex:1;border:1px solid var(--line-dark);padding:12px;font:inherit}.table{width:100%;border-collapse:collapse;margin-top:14px}.table th,.table td{border:1px solid var(--line);padding:10px;text-align:left;font-weight:400}.table th{background:var(--soft);color:var(--muted)}
.legal-page{max-width:900px}.legal-page h1{font-size:clamp(34px,5vw,56px)}.legal-section{border-top:1px solid var(--line);padding-top:24px;margin-top:28px}.legal-section ul{color:var(--muted)}
.footer{border-top:1px solid var(--line);margin-top:30px}.footer-inner{max-width:1420px;margin:0 auto;padding:26px 24px;display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:14px}.footer-links{display:flex;gap:18px;flex-wrap:wrap}
@media(max-width:1100px){.page-shell{grid-template-columns:240px minmax(0,1fr)}.calculator-layout{grid-template-columns:1fr}.grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.site-header{position:relative}.top-nav{align-items:flex-start;display:grid;grid-template-columns:1fr auto;padding:14px 18px}.nav-toggle{display:block}.nav-links{grid-column:1 / -1;display:none;flex-direction:column;align-items:flex-start;gap:10px;border-top:1px solid var(--line);padding-top:14px;margin-top:4px}.nav-links.open{display:flex}.page-shell{display:block}.calculator-sidebar{border-right:0;border-bottom:1px solid var(--line);min-height:0}.sidebar-inner{position:static;max-height:none;padding:18px}.sidebar-title{margin-bottom:12px}.sidebar-group{margin-bottom:18px}.hero{padding:42px 18px 34px}.container{padding:34px 18px}.grid.three,.grid.two,.form-grid{grid-template-columns:1fr}.footer-inner{flex-direction:column}.card{padding:18px}.h1{font-size:34px}}