/* ============================================================
   WageWiseo Design System — premium SaaS tool-site look
   Light theme default + dark mode toggle (data-theme="dark")
   Mobile-first, system fonts, fast loading, zero clutter
   ============================================================ */
:root{
  --bg:#f7f9fc; --surface:#ffffff; --surface-2:#f1f5f9;
  --text:#0f1e33; --muted:#5b6b82; --faint:#8a99ae;
  --border:#e3e9f2; --border-soft:#eef2f7;
  --primary:#1c5fd6; --primary-dark:#1549a8; --primary-soft:#e8f0fe;
  --accent:#0d9b6c; --accent-soft:#e6f7f0;
  --warn:#d97706; --danger:#dc2626;
  --shadow-sm:0 1px 2px rgba(15,30,51,.06);
  --shadow:0 2px 6px rgba(15,30,51,.07),0 10px 28px rgba(15,30,51,.07);
  --shadow-lg:0 4px 10px rgba(15,30,51,.08),0 18px 44px rgba(15,30,51,.12);
  --radius:14px; --radius-sm:9px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --header-h:64px; --maxw:1140px;
}
[data-theme="dark"]{
  --bg:#0a1120; --surface:#101b31; --surface-2:#16233c;
  --text:#e8eef7; --muted:#9fb0c7; --faint:#6d7f96;
  --border:#1f2f4d; --border-soft:#182641;
  --primary:#5b8def; --primary-dark:#3f74d8; --primary-soft:#16294d;
  --accent:#2fbf8f; --accent-soft:#0e2f26;
  --shadow-sm:0 1px 2px rgba(0,0,0,.35);
  --shadow:0 2px 6px rgba(0,0,0,.35),0 10px 28px rgba(0,0,0,.35);
  --shadow-lg:0 4px 10px rgba(0,0,0,.4),0 18px 44px rgba(0,0,0,.45);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
img{max-width:100%}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
::selection{background:var(--primary);color:#fff}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{max-width:var(--maxw);margin:0 auto;padding:0 20px;height:var(--header-h);display:flex;align-items:center;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;color:var(--text);letter-spacing:-.3px}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#1c5fd6,#0d3b8f);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:19px;box-shadow:var(--shadow-sm)}
.main-nav{display:flex;gap:2px;margin-left:4px}
.main-nav a{color:var(--muted);font-weight:600;font-size:14px;padding:8px 10px;border-radius:8px;white-space:nowrap}
.main-nav a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}
.main-nav a.active{color:var(--primary);background:var(--primary-soft)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.header-search-wrap{position:relative}
.header-search-wrap input{width:170px;padding:9px 12px 9px 34px;font-size:14px;border:1.5px solid var(--border);border-radius:999px;background:var(--bg);color:var(--text);outline:none;transition:width .2s,border-color .2s}
.header-search-wrap input:focus{width:220px;border-color:var(--primary)}
.header-search-wrap .search-icon{left:12px;font-size:15px}
.header-search-results{position:absolute;top:calc(100% + 8px);right:0;width:300px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);max-height:340px;overflow:auto;text-align:left;display:none;z-index:50}
.header-search-results.open{display:block}
.header-search-results a{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 14px;color:var(--text);font-size:14px;border-bottom:1px solid var(--border-soft)}
.header-search-results a:last-child{border-bottom:none}
.header-search-results a:hover{background:var(--surface-2);text-decoration:none}
.header-search-results .cat{font-size:11px;color:var(--faint);background:var(--surface-2);padding:2px 8px;border-radius:99px;white-space:nowrap}
#search-toggle{display:none}
.mobile-search-row{display:none;border-bottom:1px solid var(--border);background:var(--surface);padding:10px 20px}
.mobile-search-row.open{display:block}
.mobile-search-row .header-search-wrap input{width:100%}
.mobile-search-row .header-search-wrap input:focus{width:100%}
.mobile-search-row .header-search-results{left:0;right:0;width:auto}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:transform .15s,box-shadow .15s}
.icon-btn:hover{box-shadow:var(--shadow-sm);transform:translateY(-1px)}
.hamburger{display:none}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 100%);padding:64px 0 48px;text-align:center}
.hero h1{font-size:clamp(2rem,4.6vw,3.1rem);letter-spacing:-1px;line-height:1.15;margin-bottom:14px}
.hero .lede{font-size:clamp(1.02rem,2vw,1.22rem);color:var(--muted);max-width:640px;margin:0 auto 26px}
.search-wrap{position:relative;max-width:560px;margin:0 auto}
.search-wrap input{width:100%;padding:15px 20px 15px 48px;font-size:16.5px;border:2px solid var(--border);border-radius:999px;background:var(--surface);color:var(--text);outline:none;transition:border-color .2s,box-shadow .2s}
.search-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 15%,transparent)}
.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:19px;color:var(--faint);pointer-events:none}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);max-height:340px;overflow:auto;text-align:left;display:none;z-index:50}
.search-results.open{display:block}
.search-results a{display:flex;justify-content:space-between;align-items:center;padding:11px 16px;color:var(--text);border-bottom:1px solid var(--border-soft)}
.search-results a:last-child{border-bottom:none}
.search-results a:hover{background:var(--surface-2);text-decoration:none}
.search-results .cat{font-size:12px;color:var(--faint);background:var(--surface-2);padding:3px 9px;border-radius:99px;white-space:nowrap}
.hero-badges{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.hero-badge{font-size:13.5px;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--border);padding:7px 14px;border-radius:999px;box-shadow:var(--shadow-sm)}

/* ---------- Sections / cards ---------- */
.section{padding:44px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px;gap:12px}
.section-head h2{font-size:clamp(1.4rem,2.6vw,1.85rem);letter-spacing:-.4px}
.section-head a{font-weight:600;font-size:15px;white-space:nowrap}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);transition:transform .18s,box-shadow .18s;display:flex;flex-direction:column;gap:8px;position:relative}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.tool-card h3{font-size:16.5px;color:var(--text);margin:0}
.tool-card p{font-size:14px;color:var(--muted);margin:0;flex:1}
.tool-card .card-cat{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--primary)}
.badge-new{position:absolute;top:12px;right:12px;font-size:11px;font-weight:800;background:var(--accent);color:#fff;padding:3px 9px;border-radius:99px;letter-spacing:.4px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.cat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:transform .18s,box-shadow .18s;display:block}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.cat-card .cat-icon{font-size:30px;margin-bottom:10px}
.cat-card h3{font-size:16.5px;color:var(--text);margin-bottom:4px}
.cat-card p{font-size:13.5px;color:var(--muted);margin:0}
.cat-card .count{font-size:12.5px;font-weight:700;color:var(--primary);margin-top:8px;display:block}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13.5px;color:var(--faint);margin:22px 0 6px}
.breadcrumb a{color:var(--muted)}
.page-head{margin-bottom:8px}
.page-head h1{font-size:clamp(1.7rem,3.6vw,2.4rem);letter-spacing:-.6px;margin-bottom:8px}
.page-head .lede{color:var(--muted);font-size:1.06rem;max-width:720px}

/* ---------- Calculator tool card ---------- */
.tool-layout{display:grid;grid-template-columns:1fr;gap:22px;margin:24px 0 8px}
.calc-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-weight:650;font-size:14.5px}
.field label .req{color:var(--danger)}
.field .hint{font-size:12.8px;color:var(--faint)}
.field input,.field select{padding:12px 14px;font-size:16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);outline:none;transition:border-color .18s,box-shadow .18s;width:100%;font-family:inherit}
.field input:focus,.field select:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 14%,transparent);background:var(--surface)}
.field input.field-error{border-color:var(--danger);box-shadow:0 0 0 3px color-mix(in srgb,var(--danger) 12%,transparent)}
.input-group{display:flex;align-items:stretch}
.input-group .prefix,.input-group .suffix{display:flex;align-items:center;padding:0 13px;background:var(--surface-2);border:1.5px solid var(--border);color:var(--muted);font-weight:600;font-size:15px}
.input-group .prefix{border-right:none;border-radius:var(--radius-sm) 0 0 var(--radius-sm)}
.input-group .suffix{border-left:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.input-group input{border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.input-group .prefix+input{border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.input-group input:has(+.suffix){border-radius:var(--radius-sm) 0 0 var(--radius-sm)}
.btn-row{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;font-size:16px;font-weight:700;border-radius:10px;border:none;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 14px color-mix(in srgb,var(--primary) 35%,transparent)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px color-mix(in srgb,var(--primary) 45%,transparent)}
.btn-ghost{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--border-soft)}
.btn-sm{padding:8px 16px;font-size:14px}
.form-errors{display:none;background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:var(--radius-sm);padding:13px 16px;margin-bottom:16px;font-size:14.5px}
[data-theme="dark"] .form-errors{background:#3b1414;border-color:#7f2d2d;color:#fecaca}
.form-errors.show{display:block}
.form-errors ul{margin:6px 0 0 18px}

/* results */
.results{display:none;margin-top:22px;border-top:1px dashed var(--border);padding-top:22px}
.results.show{display:block;animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.result-hero{text-align:center;background:linear-gradient(135deg,var(--primary-soft),var(--accent-soft));border:1px solid var(--border);border-radius:var(--radius);padding:24px 16px;margin-bottom:18px}
.result-hero .rh-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:6px}
.result-hero .rh-value{font-size:clamp(2rem,5vw,2.9rem);font-weight:800;letter-spacing:-1px;color:var(--text)}
.result-hero .rh-sub{font-size:14px;color:var(--muted);margin-top:6px}
.result-table{width:100%;border-collapse:collapse;font-size:15px;margin-bottom:14px}
.result-table th,.result-table td{padding:11px 13px;text-align:left;border-bottom:1px solid var(--border-soft)}
.result-table th{color:var(--muted);font-weight:600;font-size:13.5px;text-transform:uppercase;letter-spacing:.5px}
.result-table td:last-child,.result-table th:last-child{text-align:right;font-variant-numeric:tabular-nums}
.result-table tr.total td{font-weight:800;border-bottom:none;font-size:16.5px}
.result-note{background:var(--surface-2);border-left:4px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:13px 16px;font-size:14.5px;color:var(--muted);margin:14px 0}
.copy-row{display:flex;justify-content:flex-end;margin-top:6px}

/* ---------- Content ---------- */
.prose{max-width:780px}
.prose h2{font-size:1.45rem;letter-spacing:-.3px;margin:34px 0 12px;padding-top:6px}
.prose h3{font-size:1.15rem;margin:24px 0 8px}
.prose p{margin-bottom:15px;color:var(--text)}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose li{margin-bottom:7px}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--border);padding:10px 12px;text-align:left}
.prose th{background:var(--surface-2);font-size:13.5px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.formula-box{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px;margin:16px 0;font-family:var(--mono);font-size:15.5px;overflow-x:auto}
.example-box{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:var(--radius-sm);padding:18px 20px;margin:16px 0}
.example-box strong{color:var(--accent)}

/* FAQ accordion */
.faq{margin-top:10px}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden;transition:box-shadow .18s}
.faq details[open]{box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:650;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--primary);font-weight:400;flex-shrink:0;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-a{padding:0 18px 16px;color:var(--muted);font-size:15px}

/* related */
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:14px}
.related-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font-weight:600;font-size:14.5px;color:var(--text);display:block;transition:transform .15s,box-shadow .15s}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);text-decoration:none}
.related-card span{display:block;font-weight:400;font-size:12.5px;color:var(--faint);margin-top:3px}

/* ad slots (fill after AdSense approval) */
.ad-slot{margin:26px auto;min-height:110px;max-width:970px;background:var(--surface-2);border:1px dashed var(--border);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--faint);font-size:12.5px;text-transform:uppercase;letter-spacing:1.5px}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:56px;padding:44px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;margin-bottom:30px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:10px;max-width:300px}
.footer-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.8px;color:var(--faint);margin-bottom:12px}
.footer-col a{display:block;font-size:14.5px;color:var(--muted);margin-bottom:9px}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border-soft);padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--faint)}
.disclaimer{font-size:12.5px;color:var(--faint);margin-top:14px;line-height:1.6}

/* basic calculator buttons */
.basic-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:6px}
.basic-display{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:18px;font-size:2rem;text-align:right;font-variant-numeric:tabular-nums;min-height:76px;overflow-x:auto;white-space:nowrap;font-family:var(--mono);margin-bottom:14px}
.key{padding:16px;font-size:19px;font-weight:600;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);cursor:pointer;transition:background .12s,transform .08s;font-family:inherit}
.key:hover{background:var(--surface-2)}
.key:active{transform:scale(.96)}
.key.op{background:var(--primary-soft);color:var(--primary);font-weight:700}
.key.eq{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none}
.key.util{color:var(--danger);font-weight:700}

/* misc pages */
.static-page{max-width:780px;margin:0 auto}
.contact-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:26px;margin-top:20px}
.big-mail{font-size:1.25rem;font-weight:700;word-break:break-all}

/* responsive */
@media(max-width:1080px){
  .main-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);flex-direction:column;padding:10px 20px 16px;gap:2px}
  .main-nav.open{display:flex}
  .main-nav a{font-size:15px;padding:10px 12px}
  .hamburger{display:flex}
  #search-toggle{display:flex}
  .header-search-wrap.desktop-only{display:none}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero{padding:44px 0 34px}
}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}.btn-row .btn{flex:1}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}