:root{
  --bg:#f6f7f4;
  --surface:#ffffff;
  --ink:#152019;
  --muted:#5a665d;
  --line:#d9dfda;
  --accent:#155c3a;
  --accent-2:#0e4329;
  --soft:#e9f3ed;
  --warn:#fff6d8;
  --danger:#fff0ee;
  --shadow:0 10px 35px rgba(20,40,28,.08);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65}
a{color:var(--accent-2)}
a:hover{text-decoration-thickness:2px}
.wrap{width:min(1120px,calc(100% - 32px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:12px;z-index:1000;background:#fff;padding:10px 14px;border:2px solid var(--ink)}
.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;gap:24px;justify-content:space-between;min-height:68px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-weight:800;color:var(--ink);font-size:1.05rem;white-space:nowrap}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:white;font-size:1.2rem}
.main-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{padding:7px 9px;text-decoration:none;color:var(--muted);border-radius:8px;font-size:.93rem}
.main-nav a:hover{background:var(--soft);color:var(--ink)}
.breadcrumbs{width:min(1120px,calc(100% - 32px));margin:18px auto 0;color:var(--muted);font-size:.9rem}
.breadcrumbs ol{display:flex;gap:8px;list-style:none;padding:0;margin:0;flex-wrap:wrap}
.breadcrumbs li+li:before{content:"/";margin-right:8px;color:#98a199}
.content{padding:44px 0 72px}
.content>h1,.content>section:first-child h1{font-size:clamp(2.1rem,6vw,4.4rem);line-height:1.02;letter-spacing:-.045em;max-width:850px;margin-top:0}
.content h2{font-size:clamp(1.45rem,3vw,2.2rem);line-height:1.15;margin-top:2.4em;letter-spacing:-.02em}
.content h3{line-height:1.25}
.content p,.content li{max-width:78ch}
.content table{border-collapse:collapse;width:100%;background:var(--surface);box-shadow:var(--shadow);border-radius:14px;overflow:hidden;margin:24px 0}
.content th,.content td{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
.content th{background:#edf2ee}
.content blockquote{margin:24px 0;padding:16px 18px;background:var(--warn);border-left:4px solid #b88700;border-radius:0 12px 12px 0}
.section-kicker{text-transform:uppercase;letter-spacing:.11em;font-weight:800;font-size:.74rem;color:var(--accent);margin-bottom:8px}
.calculator{margin:36px 0 52px;background:linear-gradient(180deg,#fff,#fbfcfa);border:1px solid var(--line);border-radius:24px;padding:clamp(20px,4vw,38px);box-shadow:var(--shadow)}
.calculator h2{margin-top:0}
.calc-intro{font-size:1.05rem;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:24px 0}
.form-grid label{display:flex;flex-direction:column;gap:7px;font-weight:700}
.form-grid label span b{font-weight:600;color:var(--muted)}
input,select{width:100%;padding:13px 14px;border:1px solid #bfc8c1;border-radius:10px;background:#fff;color:var(--ink);font:inherit}
input:focus,select:focus,button:focus,a:focus{outline:3px solid rgba(21,92,58,.22);outline-offset:2px}
.form-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:12px 16px;font:inherit;font-weight:800;text-decoration:none;cursor:pointer}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-2)}
.btn-secondary{background:var(--ink);color:#fff}
.btn-ghost{background:#eef1ee;color:var(--ink)}
.fineprint{font-size:.88rem;color:var(--muted)}
.calculator-result{margin-top:28px}
.result-head{padding:20px;border-radius:16px;background:var(--soft);margin-bottom:16px}
.result-head.error{background:var(--danger)}
.result-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}
.result-card,.product-card,.spec-reference{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 5px 22px rgba(20,40,28,.05)}
.result-card h3,.product-card h3,.spec-reference h3{margin-top:5px}
.ad-label{display:inline-block;font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:#7b4d00;background:#fff2cd;padding:5px 8px;border-radius:999px}
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}
.spec-grid div{background:#f7f8f6;padding:10px;border-radius:10px}
.spec-grid dt{font-size:.78rem;color:var(--muted);font-weight:700}
.spec-grid dd{margin:0;font-weight:800}
.notice{padding:15px 17px;border-radius:12px;margin:18px 0}
.notice.warning{background:var(--warn)}
.notice.danger{background:var(--danger)}
.product-card,.spec-reference{margin:22px 0;max-width:760px}
.legal-block{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:clamp(20px,4vw,38px);box-shadow:var(--shadow)}
.blocker{border-top:6px solid #b43b2f}
.site-footer{border-top:1px solid var(--line);background:#e9ede9;padding:36px 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:30px}
.footer-grid p{color:var(--muted);max-width:60ch}
.footer-grid nav{display:flex;flex-direction:column;gap:8px}
code{background:#edf0ed;padding:.15em .35em;border-radius:5px}
@media (max-width:860px){
  .site-header{position:static}
  .header-inner{align-items:flex-start;flex-direction:column;padding:14px 0}
  .main-nav{justify-content:flex-start}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  .wrap{width:min(100% - 22px,1120px)}
  .content{padding-top:28px}
  .main-nav{display:grid;grid-template-columns:repeat(2,1fr);width:100%}
  .main-nav a{background:#f3f5f2}
  .spec-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .content table{display:block;overflow-x:auto}
}