:root{
  --ink:#12213a;
  --ink-soft:#4b5b74;
  --paper:#f6f8fb;
  --card:#ffffff;
  --line:#e2e7f0;
  --brand:#1458c9;
  --brand-dark:#0d3f96;
  --accent:#0f9d78;
  --tax:#b3541e;
  --health:#c22857;
  --math:#6b3fc9;
  --unit:#0f8fa0;
  --finance:#1458c9;
  --radius:10px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.55;
}
a{color:var(--brand);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;}

/* header */
header.site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 10px rgba(0,0,0,.12);}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;}
.logo{font-size:1.35rem;font-weight:800;color:#fff;letter-spacing:-.02em;}
.logo span{color:#7db2ff;}
nav.main-nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;flex-wrap:wrap;}
nav.main-nav a{color:#dbe6fb;font-weight:600;font-size:.95rem;}
nav.main-nav a:hover{color:#fff;text-decoration:none;}
.nav-toggle{display:none;}

/* hero */
.hero{background:linear-gradient(135deg,var(--brand-dark),var(--brand) 60%,#2c7be5);color:#fff;padding:52px 0 46px;}
.hero h1{font-size:2.3rem;margin:0 0 10px;font-weight:800;letter-spacing:-.02em;}
.hero p{font-size:1.08rem;color:#dce8fd;max-width:720px;margin:0 0 22px;}
.hero-search{display:flex;max-width:560px;background:#fff;border-radius:50px;padding:6px;box-shadow:0 8px 24px rgba(0,0,0,.18);}
.hero-search input{flex:1;border:none;outline:none;padding:12px 18px;border-radius:50px;font-size:1rem;}
.hero-search button{background:var(--accent);color:#fff;border:none;padding:0 24px;border-radius:50px;font-weight:700;cursor:pointer;}
.hero-stats{display:flex;gap:28px;margin-top:26px;flex-wrap:wrap;}
.hero-stats div{background:rgba(255,255,255,.12);padding:10px 18px;border-radius:8px;font-size:.9rem;}
.hero-stats strong{display:block;font-size:1.3rem;}

/* category cards */
.section{padding:44px 0;}
.section h2{font-size:1.6rem;margin:0 0 6px;letter-spacing:-.01em;}
.section .lead{color:var(--ink-soft);margin:0 0 26px;}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:transform .15s, box-shadow .15s;display:block;}
.cat-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(20,40,80,.1);text-decoration:none;}
.cat-card .icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:14px;color:#fff;}
.cat-card h3{margin:0 0 6px;color:var(--ink);font-size:1.15rem;}
.cat-card p{margin:0 0 10px;color:var(--ink-soft);font-size:.92rem;}
.cat-card .count{font-size:.82rem;font-weight:700;color:var(--brand);}
.c-finance .icon{background:var(--finance);} .c-tax .icon{background:var(--tax);}
.c-health .icon{background:var(--health);} .c-math .icon{background:var(--math);}
.c-unit .icon{background:var(--unit);}

/* all links directory on home page */
.directory{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-bottom:22px;}
.directory h3{margin:0 0 4px;font-size:1.2rem;}
.directory .sub{color:var(--ink-soft);font-size:.88rem;margin:0 0 16px;}
.link-columns{column-count:4;column-gap:22px;}
@media(max-width:900px){.link-columns{column-count:2;}}
@media(max-width:520px){.link-columns{column-count:1;}}
.link-columns a{display:block;font-size:.86rem;padding:4px 0;color:var(--ink-soft);break-inside:avoid;}
.link-columns a:hover{color:var(--brand);}

/* breadcrumb */
.breadcrumb{font-size:.83rem;color:var(--ink-soft);padding:14px 0;}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--brand);}

/* calculator page */
.calc-page{padding:8px 0 50px;}
.calc-head h1{font-size:1.85rem;margin:0 0 8px;letter-spacing:-.01em;}
.calc-head .badge{display:inline-block;font-size:.75rem;font-weight:700;padding:4px 10px;border-radius:20px;color:#fff;margin-bottom:12px;}
.calc-head p.desc{color:var(--ink-soft);max-width:760px;}
.calc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:22px 0;box-shadow:0 4px 16px rgba(20,40,80,.05);}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:18px;}
.field label{display:block;font-size:.82rem;font-weight:700;color:var(--ink-soft);margin-bottom:6px;}
.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:.98rem;background:#fbfcfe;}
.field input:focus,.field select:focus{outline:2px solid var(--brand);border-color:var(--brand);}
.calc-btn{background:var(--brand);color:#fff;border:none;padding:11px 26px;border-radius:8px;font-weight:700;cursor:pointer;font-size:.95rem;}
.calc-btn:hover{background:var(--brand-dark);}
.calc-result{margin-top:18px;padding:0;border-radius:8px;overflow:hidden;display:none;}
.calc-result.show{display:block;border:1px solid var(--line);}
.result-main{background:#eef4ff;padding:16px 18px;display:flex;justify-content:space-between;align-items:baseline;font-size:1.15rem;}
.result-main strong{color:var(--brand-dark);font-size:1.3rem;}
.result-sub{padding:11px 18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:.92rem;color:var(--ink-soft);background:#fff;}

.content-block{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:22px 0;}
.content-block h2{font-size:1.2rem;margin:0 0 10px;}
.content-block p{color:var(--ink-soft);margin:0 0 10px;}
.content-block ul{color:var(--ink-soft);padding-left:20px;}

.related{margin-top:22px;}
.related h2{font-size:1.1rem;margin:0 0 12px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;}
.related-grid a{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:11px 14px;font-size:.87rem;color:var(--ink);}
.related-grid a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;}

/* category listing page */
.cat-toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.cat-toolbar input{padding:10px 14px;border:1px solid var(--line);border-radius:8px;min-width:260px;}
.list-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;}
.list-grid a{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:14px 16px;color:var(--ink);font-size:.92rem;font-weight:600;}
.list-grid a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;}

/* footer */
footer.site-footer{background:var(--ink);color:#c7d3e8;margin-top:40px;padding:40px 0 24px;}
.footer-grid{display:grid;grid-template-columns:2fr repeat(5,1fr);gap:24px;}
.footer-grid h4{color:#fff;font-size:.92rem;margin:0 0 12px;}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin-bottom:7px;}
.footer-grid a{color:#a9b8d6;font-size:.84rem;}
.footer-grid a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #263657;margin-top:28px;padding-top:18px;font-size:.8rem;color:#8494b3;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr 1fr;}}
@media(max-width:600px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:1.7rem;}
  nav.main-nav ul{gap:12px;}
}