/* KiraDuit — design system. Mobile-first, fast, no external deps. */
:root{
  --brand:#0a7d5a; --brand-dark:#065f44; --brand-light:#e6f5ef;
  --accent:#f5a623; --ink:#16261f; --muted:#5b6b64; --line:#e2e8e4;
  --bg:#ffffff; --bg-soft:#f6f9f7; --danger:#c0392b; --radius:14px;
  --shadow:0 2px 10px rgba(9,60,44,.06),0 8px 30px rgba(9,60,44,.06);
  --maxw:1080px; --font:"Segoe UI",Roboto,-apple-system,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--brand-dark);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.28rem;color:var(--brand-dark)}
.brand:hover{text-decoration:none}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));display:grid;place-items:center;color:#fff;font-size:1.05rem}
.brand small{display:block;font-weight:500;font-size:.62rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 11px;font-size:1.1rem;cursor:pointer}
.mainmenu{display:flex;gap:6px;align-items:center}
.mainmenu .group{position:relative}
.mainmenu .group>span{padding:9px 12px;border-radius:9px;cursor:pointer;font-weight:600;font-size:.95rem;display:inline-block;color:var(--ink)}
.mainmenu .group:hover>span{background:var(--brand-light);color:var(--brand-dark)}
.dropdown{position:absolute;top:100%;left:0;min-width:240px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:8px;display:none}
.mainmenu .group:hover .dropdown{display:block}
.dropdown a{display:block;padding:9px 12px;border-radius:8px;font-size:.92rem;color:var(--ink)}
.dropdown a:hover{background:var(--bg-soft);text-decoration:none;color:var(--brand-dark)}

/* Hero */
.hero{background:linear-gradient(160deg,var(--brand-light),#fff 70%);padding:46px 0 34px;border-bottom:1px solid var(--line)}
.hero h1{font-size:2rem;margin:.1em 0 .35em;line-height:1.2}
.hero p{font-size:1.08rem;color:var(--muted);max-width:640px;margin:0}
.pill{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--brand-dark);font-weight:600;font-size:.78rem;padding:5px 12px;border-radius:999px;margin-bottom:8px}

/* Layout */
main{padding:30px 0 10px}
h1{font-size:1.85rem;line-height:1.22;margin:.2em 0 .5em}
h2{font-size:1.4rem;margin:1.6em 0 .5em;padding-top:.2em}
h3{font-size:1.12rem;margin:1.3em 0 .4em}
p,li{color:#26332c}
.lead{font-size:1.12rem;color:var(--muted)}
.grid{display:grid;gap:18px}
@media(min-width:720px){.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}.grid.cols-4{grid-template-columns:repeat(4,1fr)}}
.content{max-width:760px}

/* Cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.card h3{margin-top:0}
.tool-card{display:block;color:inherit;transition:transform .12s,box-shadow .12s}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(9,60,44,.12);text-decoration:none}
.tool-card .ico{width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:11px;background:var(--brand-light);color:var(--brand-dark);margin-bottom:2px}
.tool-card .ico svg{width:22px;height:22px}
.tool-card .tag{font-size:.72rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}

/* Calculator */
.calc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:8px 0 6px}
.calc .field{margin-bottom:15px}
.calc label{display:block;font-weight:600;font-size:.93rem;margin-bottom:6px}
.calc .hint{font-weight:400;color:var(--muted);font-size:.82rem}
.calc input,.calc select{width:100%;padding:12px 13px;font-size:1rem;border:1px solid #cdd8d2;border-radius:10px;background:#fff;font-family:var(--font)}
.calc input:focus,.calc select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.range-row{display:flex;gap:10px;align-items:center}
.range-row input[type=range]{flex:1;accent-color:var(--brand)}
.btn{display:inline-block;background:var(--brand);color:#fff;border:none;padding:13px 22px;font-size:1rem;font-weight:700;border-radius:10px;cursor:pointer;font-family:var(--font)}
.btn:hover{background:var(--brand-dark);text-decoration:none;color:#fff}
.btn.block{width:100%}
.result{margin-top:16px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.result .big{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;padding:18px 20px}
.result .big .lbl{font-size:.85rem;opacity:.9}
.result .big .amt{font-size:2rem;font-weight:800;line-height:1.1}
.result .rows{padding:6px 20px}
.result .rows .r{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.result .rows .r:last-child{border-bottom:none}
.result .rows .r b{font-weight:700}

/* Tables */
.table-wrap{overflow-x:auto;margin:14px 0}
table.data{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
table.data th,table.data td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line)}
table.data thead th{background:var(--brand-dark);color:#fff;font-weight:600}
table.data tbody tr:nth-child(even){background:var(--bg-soft)}
.badge{display:inline-block;font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:6px;background:var(--brand-light);color:var(--brand-dark)}

/* Callouts */
.note{border-left:4px solid var(--accent);background:#fff9ee;padding:12px 16px;border-radius:0 10px 10px 0;margin:16px 0;font-size:.95rem}
.note.info{border-color:var(--brand);background:var(--brand-light)}

/* FAQ */
details.faq{border:1px solid var(--line);border-radius:10px;padding:2px 16px;margin:10px 0;background:#fff}
details.faq summary{font-weight:700;cursor:pointer;padding:12px 0;list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
details.faq[open] summary::after{content:"–"}
details.faq p{margin:0 0 12px}

/* Ad slots */
.ad-slot{margin:22px 0;min-height:100px;display:grid;place-items:center;background:repeating-linear-gradient(45deg,#f3f6f4,#f3f6f4 10px,#eef2ef 10px,#eef2ef 20px);border:1px dashed #cdd8d2;border-radius:12px;color:#9aa8a1;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}

/* Breadcrumb */
.crumb{font-size:.85rem;color:var(--muted);padding:14px 0 0}
.crumb a{color:var(--muted)}

/* Footer */
.site-footer{background:var(--ink);color:#cfe0d8;margin-top:40px;padding:36px 0 22px;font-size:.9rem}
.site-footer a{color:#cfe0d8}
.site-footer .cols{display:grid;gap:22px}
@media(min-width:720px){.site-footer .cols{grid-template-columns:2fr 1fr 1fr}}
.site-footer h4{color:#fff;font-size:.95rem;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:7px}
.site-footer .bar{border-top:1px solid #2c3d34;margin-top:24px;padding-top:16px;color:#9fb3aa;font-size:.82rem}

/* Related */
.related{background:var(--bg-soft);border-radius:var(--radius);padding:18px;margin-top:26px}
.related a{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;margin:4px 4px 0 0;font-size:.86rem}

/* Mobile menu */
@media(max-width:820px){
  .menu-btn{display:block}
  .mainmenu{display:none;position:absolute;top:62px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:10px 14px;gap:2px;box-shadow:var(--shadow)}
  .mainmenu.open{display:flex}
  .mainmenu .group{width:100%}
  .mainmenu .group>span{display:block}
  .dropdown{position:static;display:block;border:none;box-shadow:none;padding:2px 0 8px 10px;min-width:0}
  .hero h1{font-size:1.6rem}
  h1{font-size:1.5rem}
}