/* CalcCoverage — design system
   Same skeleton as the Calc family layout (tool first, categories, popular tools),
   wearing work clothes: warm concrete gray, deep ink, strong amber accent. */
:root{
  --amber:#E8930C; --amber-dark:#B96F00; --amber-deep:#8A5500;
  --ink:#1C1E22; --ink-soft:#33302A; --muted:#6E6A5E; --line:#E2DCCE;
  --bg:#F4F2ED; --card:#FFFFFF; --soft:#EFEAE0;
  --result-bg:#FBF2DF; --result-line:#EFD9A7;
  --radius:16px; --shadow:0 6px 24px rgba(28,30,34,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);font-size:17px;line-height:1.55}
a{color:var(--amber-deep);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-in{max-width:1180px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-weight:700;font-size:1.28rem;letter-spacing:-.02em;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand img{width:42px;height:42px;display:block}
.main-nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
.main-nav a{color:var(--ink);padding:8px 12px;border-radius:10px;font-size:.98rem}
.main-nav a:hover{background:var(--soft);text-decoration:none;color:var(--ink)}
.unit-toggle{display:flex;border:1.5px solid var(--line);border-radius:999px;overflow:hidden;margin-left:6px}
.unit-toggle button{border:0;background:#fff;color:var(--muted);padding:8px 16px;font-size:.95rem;font-weight:700;cursor:pointer}
.unit-toggle button.active{background:var(--amber);color:var(--ink)}

/* ---------- layout ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:0 18px}
.layout main{max-width:900px;margin:0 auto}
.rail{display:none}
@media (min-width:1420px){
  body.ads-on .layout{display:grid;grid-template-columns:300px minmax(0,900px) 300px;gap:26px;justify-content:center;align-items:start}
  body.ads-on .layout main{margin:0}
  body.ads-on .rail{display:block;position:sticky;top:90px}
}
.ad-slot{display:none}
body.ads-on .ad-slot{display:flex;align-items:center;justify-content:center;background:#fff;border:1px dashed var(--line);
  border-radius:12px;color:var(--muted);font-size:.85rem;min-height:120px;margin:22px 0}
body.ads-on .rail .ad-slot{min-height:600px;margin:26px 0 0}
body.ads-on .ad-slot--bottom{min-height:110px}

/* ---------- hero / home ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#101216,#241C10 42%,#7A4E06 78%,#A86E00);color:#fff;border-radius:0 0 26px 26px}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;will-change:opacity,transform;transform-origin:78% 22%;
  background:radial-gradient(55% 110% at 82% 12%,rgba(255,183,64,.42),rgba(255,183,64,0) 62%),
             radial-gradient(40% 80% at 8% 95%,rgba(232,147,12,.20),rgba(232,147,12,0) 60%)}
.hero-in{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:44px 18px 38px}
.hero h1{margin:0 0 10px;font-size:2.15rem;line-height:1.18;letter-spacing:-.015em}
.hero p{margin:0 0 22px;color:#E9E2D2;font-size:1.08rem;max-width:640px}
.search-box{display:flex;max-width:560px;background:#fff;border-radius:14px;padding:6px;box-shadow:var(--shadow)}
.search-box input{flex:1;border:0;outline:0;font-size:1.05rem;padding:10px 12px;color:var(--ink);min-width:0}
.search-box span{display:flex;align-items:center;padding:0 12px;color:var(--muted)}
.section{padding:30px 0 6px}
.section h2{font-size:1.45rem;margin:0 0 6px;color:var(--ink);letter-spacing:-.01em}
.section .sub{color:var(--muted);margin:0 0 18px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px;display:block;color:var(--ink);box-shadow:0 2px 10px rgba(28,30,34,.05);transition:transform .12s ease,box-shadow .12s ease}
.tool-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow);border-color:#D8CBA8}
.tool-card .icon{font-size:1.7rem;line-height:1;display:block;margin-bottom:10px}
.tool-card h3{margin:0 0 5px;font-size:1.08rem;color:var(--ink)}
.tool-card p{margin:0;color:var(--muted);font-size:.94rem}
.tool-card.pop{border-color:var(--result-line);background:linear-gradient(180deg,#FDF8EC,#fff)}
.no-results{display:none;color:var(--muted);padding:14px 2px}

/* ---------- gentle motion (his idea: a slow breathing pulse) ----------
   A ~11s ease-in-out breath — the hero's warm glow swells and settles, and
   the logo badge breathes a soft halo on the same rhythm. CSS-only, and
   fully off for visitors who prefer reduced motion. */
@media (prefers-reduced-motion: no-preference){
  .hero::after{animation:hero-breathe 11s ease-in-out infinite}
  @keyframes hero-breathe{0%,100%{opacity:.25;transform:scale(1)}50%{opacity:1;transform:scale(1.12)}}
  .brand img{animation:logo-breathe 11s ease-in-out infinite}
  @keyframes logo-breathe{0%,100%{filter:drop-shadow(0 0 0 rgba(232,147,12,0));transform:scale(1)}50%{filter:drop-shadow(0 0 12px rgba(232,147,12,.75));transform:scale(1.04)}}
}

/* ---------- tool pages ---------- */
.crumb{font-size:.9rem;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}
.page-head h1{font-size:1.9rem;margin:8px 0 6px;color:var(--ink);letter-spacing:-.015em;line-height:1.22}
.page-head p{color:var(--muted);margin:0 0 20px;max-width:700px}
.tool-box{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:24px}
.tool-box h2{margin:0 0 14px;font-size:1.15rem;color:var(--ink)}
.field{margin-bottom:15px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.97rem}
.field .hint{font-weight:400;color:var(--muted);font-size:.87rem}
.field input,.field select{width:100%;padding:14px;font-size:1.08rem;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);outline:none}
.field input:focus,.field select:focus{border-color:var(--amber);box-shadow:0 0 0 3px rgba(232,147,12,.22)}
.inrow{display:flex;gap:10px}
.inrow input{flex:1;min-width:0}
.inrow select{width:108px;flex:0 0 108px;font-weight:600}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.gen-list{border:1.5px solid var(--line);border-radius:14px;overflow:hidden}
.gen-row{display:flex;align-items:center;gap:12px;padding:11px 14px;background:#fff}
.gen-row:nth-child(even){background:var(--soft)}
.gen-row input[type=checkbox]{width:22px;height:22px;flex:0 0 22px;accent-color:var(--amber);cursor:pointer;margin:0}
.gen-row>label{flex:1;font-weight:600;font-size:.99rem;cursor:pointer}
.gen-row>label .hint{font-weight:400;color:var(--muted);font-size:.87rem}
.gen-qty{display:flex;align-items:center;gap:7px;flex:0 0 auto}
.gen-qty label{font-size:.87rem;color:var(--muted);font-weight:600}
.gen-qty input{width:64px;padding:9px 10px;font-size:1rem;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);outline:none}
.gen-qty input:focus{border-color:var(--amber);box-shadow:0 0 0 3px rgba(232,147,12,.22)}
.btn{display:inline-block;background:var(--amber);color:var(--ink);border:0;border-radius:12px;padding:15px 26px;
  font-size:1.1rem;font-weight:800;cursor:pointer;width:100%;margin-top:4px}
.btn:hover{background:var(--amber-dark);color:#fff}
.btn-secondary{background:var(--soft);color:var(--ink);width:auto;padding:11px 18px;font-size:.98rem;font-weight:700}
.btn-secondary:hover{background:#E3DCC8;color:var(--ink)}
.result{display:none;margin-top:20px;background:var(--result-bg);border:1.5px solid var(--result-line);border-radius:14px;padding:18px 20px}
.result.show{display:block}
.result .big{font-size:2rem;font-weight:800;color:var(--ink);line-height:1.2}
.result .row{display:flex;justify-content:space-between;gap:14px;padding:6px 0;border-bottom:1px solid var(--result-line)}
.result .row:last-child{border-bottom:0}
.result .row b{color:var(--ink);text-align:right}
.result p{margin:8px 0 0}
.shop{margin-top:14px;background:#fff;border:1.5px solid var(--amber);border-radius:12px;padding:14px 18px}
.shop h3{margin:0 0 8px;font-size:1.05rem;color:var(--ink)}
.shop .row{display:flex;justify-content:space-between;gap:14px;padding:5px 0;border-bottom:1px dashed var(--line)}
.shop .row:last-of-type{border-bottom:0}
.shop .row b{text-align:right}
.shop .waste-note{margin:10px 0 0;font-size:.92rem;color:var(--muted)}
.error{display:none;margin-top:14px;background:#FDECEC;border:1.5px solid #F5C2C2;color:#8C2B2B;border-radius:12px;padding:12px 16px}
.error.show{display:block}
.dyn-row{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;margin-bottom:10px;align-items:end}
.dyn-row .field{margin-bottom:0}
.dyn-remove{background:#FDECEC;color:#8C2B2B;border:0;border-radius:10px;padding:13px 14px;cursor:pointer;font-weight:700}

/* ---------- content ---------- */
.content{padding:8px 0 4px}
.content h2{font-size:1.4rem;color:var(--ink);margin:26px 0 8px;letter-spacing:-.01em}
.content h3{font-size:1.1rem;color:var(--ink);margin:20px 0 6px}
.content p{margin:0 0 12px}
.content ul{margin:0 0 12px;padding-left:22px}
.content li{margin-bottom:5px}
.formula{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:14px 18px;font-size:1.05rem;text-align:center;margin:12px 0 16px;color:var(--ink);font-weight:600}
.example{background:#FFF9EC;border:1px solid #F0E2BC;border-radius:12px;padding:14px 18px;margin:12px 0 16px}
.example b{color:#7A5B12}
.note{background:#FFF4F4;border:1px solid #F3D3D3;border-radius:12px;padding:14px 18px;margin:16px 0;font-size:.96rem}
.ref-table{width:100%;border-collapse:collapse;margin:12px 0 18px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ref-table th{background:var(--ink);color:#fff;text-align:left;padding:10px 14px;font-size:.95rem}
.ref-table td{padding:9px 14px;border-top:1px solid var(--line);font-size:.97rem}
.ref-table tr td:first-child{font-weight:600}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq details p{margin:8px 0 2px;color:var(--ink)}
.related{padding:10px 0 34px}
.related h2{font-size:1.3rem;color:var(--ink);margin:18px 0 14px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#CFC9BA;margin-top:26px}
.footer-in{max-width:1180px;margin:0 auto;padding:30px 18px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:26px}
.site-footer a{color:#F3EEE2}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.1rem}
.footer-brand img{width:34px;height:34px}
.site-footer h4{color:#fff;margin:0 0 10px;font-size:1rem}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:7px;font-size:.95rem}
.footer-note{border-top:1px solid rgba(255,255,255,.16);padding:14px 18px;text-align:center;font-size:.87rem;color:#A79F8D;max-width:1180px;margin:0 auto}

/* ---------- simple pages ---------- */
.simple-page{max-width:820px;margin:0 auto;padding-bottom:20px}
.simple-page h1{font-size:1.8rem;color:var(--ink);margin:20px 0 10px}
.simple-page h2{font-size:1.25rem;color:var(--ink);margin:22px 0 6px}

/* ---------- mobile ---------- */
@media (max-width:720px){
  body{font-size:16px}
  .hero h1{font-size:1.62rem}
  .hero-in{padding:32px 16px 28px}
  .page-head h1{font-size:1.52rem}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .dyn-row{grid-template-columns:1fr 1fr auto}
  .tool-box{padding:18px 16px}
  .result .big{font-size:1.6rem}
  .footer-in{grid-template-columns:1fr}
  .main-nav{margin-left:0}
  .header-in{gap:10px}
  .inrow select{width:96px;flex-basis:96px}
}