:root{
  --bg:#f7f8fb;--surface:#fff;--ink:#0f172a;--ink-2:#334155;--muted:#64748b;
  --line:#e5e7eb;--brand:#2563eb;--brand-2:#1d4ed8;--accent:#10b981;
  --shadow:0 6px 24px rgba(15,23,42,.06);--radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:#000;color:#fff;padding:8px 12px;border-radius:6px;z-index:100}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px}
.brand{font-weight:800;font-size:20px;color:var(--ink)}
.brand span{color:var(--brand)}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:var(--ink-2);font-weight:500}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:18px;cursor:pointer}
@media(max-width:760px){
  .menu-toggle{display:inline-block}
  .nav{display:none;width:100%;flex-direction:column;gap:6px;padding:10px 0}
  .nav.open{display:flex}
  .header-inner{flex-wrap:wrap}
}

/* Hero */
.hero{padding:64px 0 32px;text-align:center}
.hero h1{font-size:clamp(28px,4.2vw,44px);line-height:1.15;margin:0 0 14px;letter-spacing:-.02em}
.hero p{font-size:18px;color:var(--ink-2);max-width:720px;margin:0 auto 22px}
.search{display:flex;gap:8px;max-width:560px;margin:0 auto}
.search input{flex:1;padding:14px 16px;border:1px solid var(--line);border-radius:12px;font-size:16px;background:#fff}
.search input:focus{outline:2px solid var(--brand);outline-offset:1px}

/* Sections */
section{padding:32px 0}
h1,h2,h3{color:var(--ink);letter-spacing:-.01em}
h2{font-size:26px;margin:0 0 16px}
h3{font-size:18px;margin:0 0 8px}
.muted{color:var(--muted)}

/* Cards */
.grid{display:grid;gap:16px}
.grid.cats{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.grid.tools{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:block;color:inherit}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(15,23,42,.08);text-decoration:none}
.card h3{margin:0 0 6px;color:var(--ink)}
.card p{margin:0;color:var(--muted);font-size:14px}
.tag{display:inline-block;font-size:12px;background:#eef2ff;color:#3730a3;padding:2px 8px;border-radius:999px;margin-bottom:8px}

/* Short answer / AEO box */
.answer-box{background:#ecfdf5;border:1px solid #a7f3d0;border-left:4px solid var(--accent);padding:16px 18px;border-radius:12px;margin:16px 0 24px}
.answer-box strong{display:block;margin-bottom:4px;color:#065f46}

/* Tool */
.tool{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.tool form{display:grid;gap:14px}
.field{display:grid;gap:6px}
.field label{font-weight:600;font-size:14px;color:var(--ink-2)}
.field input,.field select,.field textarea{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fff;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--brand);outline-offset:1px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.row{grid-template-columns:1fr}}
.btn{display:inline-block;padding:12px 18px;border-radius:10px;border:1px solid transparent;font-weight:600;cursor:pointer;font-size:15px;text-align:center}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2);text-decoration:none}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}

/* Result */
.result{margin-top:18px;padding:16px;border-radius:12px;background:#f1f5f9;border:1px solid var(--line);min-height:48px;font-size:16px}
.result.ok{background:#ecfdf5;border-color:#a7f3d0}
.result strong{font-size:20px;color:var(--ink)}

/* Ad slot */
.ad-slot{margin:28px 0;padding:24px;text-align:center;border:1px dashed #cbd5e1;background:#fff;border-radius:12px;color:var(--muted);font-size:13px;letter-spacing:.05em;text-transform:uppercase}

/* FAQ */
.faq{margin-top:24px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px}
.faq-item summary{cursor:pointer;font-weight:600;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";float:right;color:var(--brand);font-weight:700}
.faq-item[open] summary::after{content:"−"}
.faq-a{padding-top:10px;color:var(--ink-2)}

/* Breadcrumbs */
.breadcrumbs{margin:16px 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0;font-size:14px;color:var(--muted)}
.breadcrumbs li+li::before{content:"/";margin-right:6px;color:var(--muted)}

/* CTA */
.cta{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;border-radius:var(--radius);padding:36px;text-align:center;margin:36px 0}
.cta h2{color:#fff;margin:0 0 8px}
.cta p{color:#dbeafe;margin:0 0 16px}
.cta .btn{background:#fff;color:var(--brand)}

/* Article body */
.prose{max-width:800px}
.prose p{color:var(--ink-2);margin:0 0 14px}
.prose ul,.prose ol{color:var(--ink-2);padding-left:22px}
.prose h2{margin-top:28px}
.prose h3{margin-top:20px}

/* Footer */
.site-footer{background:#0f172a;color:#cbd5e1;margin-top:60px;padding:40px 0 20px}
.site-footer .brand{color:#fff}
.site-footer h3{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.08em;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.site-footer a{color:#cbd5e1}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr}}
.copyright{margin-top:24px;padding-top:16px;border-top:1px solid #1e293b;font-size:13px;color:#94a3b8;text-align:center}

/* Print (for invoice/receipt/resume) */
@media print{
  .site-header,.site-footer,.ad-slot,.cta,.breadcrumbs,.faq,.tool form,.btn-row,nav,.no-print{display:none!important}
  body{background:#fff}
  .printable{box-shadow:none;border:none;padding:0}
}