*{box-sizing:border-box;margin:0;padding:0}
:root{--brand:#10b981;--brand-d:#059669;--ink:#111827;--muted:#6b7280;--bg:#f9fafb;--card:#fff;--bd:#e5e7eb}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.site-header{background:#fff;border-bottom:1px solid var(--bd);position:sticky;top:0;z-index:50}
.site-header .container{display:flex;justify-content:space-between;align-items:center;height:64px}
.logo{font-size:24px;font-weight:800;color:var(--ink);text-decoration:none}
.logo span{color:var(--brand)}
nav a{margin-left:20px;color:var(--ink);text-decoration:none;font-weight:500}
nav a:hover{color:var(--brand)}
.hero{background:linear-gradient(135deg,#10b981,#0ea5e9);color:#fff;padding:64px 0;text-align:center}
.hero h1{font-size:42px;margin-bottom:12px}
.hero p{font-size:18px;opacity:.95;max-width:680px;margin:0 auto}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:32px 0 16px}
.tab{padding:10px 18px;border:1px solid var(--bd);background:#fff;border-radius:999px;cursor:pointer;font-weight:600;color:var(--ink)}
.tab.active{background:var(--brand);border-color:var(--brand);color:#fff}
.panel{display:none;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:28px;box-shadow:0 1px 2px rgba(0,0,0,.04);margin-bottom:24px}
.panel.active{display:block}
.panel h2{font-size:26px;margin-bottom:6px}
.lead{color:var(--muted);margin-bottom:18px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:18px}
label{display:flex;flex-direction:column;font-size:14px;color:var(--muted);font-weight:600}
input,select{margin-top:6px;padding:10px 12px;border:1px solid var(--bd);border-radius:8px;font-size:15px;color:var(--ink);background:#fff}
input:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(16,185,129,.15)}
.btn{background:var(--brand);color:#fff;border:0;padding:12px 22px;border-radius:8px;font-weight:700;cursor:pointer;font-size:15px}
.btn:hover{background:var(--brand-d)}
.result{margin-top:18px;padding:16px;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:10px;color:#065f46;display:none}
.result.show{display:block}
.result strong{color:#064e3b}
.result table{width:100%;margin-top:8px;border-collapse:collapse}
.result td{padding:6px 0;border-bottom:1px dashed #a7f3d0}
.note{display:block;color:var(--muted);margin-top:10px;font-size:12px}
.info{padding:32px 20px;margin-bottom:32px}
.info h2{margin-bottom:12px}
.site-footer{background:#111827;color:#d1d5db;padding:48px 0 20px;margin-top:40px}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:32px;margin-bottom:32px}
.site-footer h3{color:#fff;margin-bottom:12px}
.site-footer h4{color:#fff;margin-bottom:12px;font-size:15px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:6px}
.site-footer a{color:#d1d5db;text-decoration:none;font-size:14px}
.site-footer a:hover{color:#fff}
.copy{border-top:1px solid #374151;padding-top:16px;text-align:center;font-size:13px;color:#9ca3af}
.legal{background:#fff;padding:32px;border-radius:14px;border:1px solid var(--bd);margin:32px 0}
.legal h1{margin-bottom:18px}
.legal h2{margin-top:24px;margin-bottom:8px;font-size:20px}
.legal p,.legal ul{margin-bottom:12px}
.legal ul{padding-left:22px}
@media(max-width:640px){.hero h1{font-size:32px}.site-header .container{flex-direction:column;height:auto;padding:12px 20px}nav{margin-top:8px}nav a{margin:0 10px}}