:root{--bg:#070911;--card:#0b1020;--border:#12182d;--ink:#e6ecff;--muted:#a6b0c3;--brand1:#0ea5e9;--brand2:#22d3ee}
*{box-sizing:border-box}html,body{height:100%}body{font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background:var(--bg);color:var(--ink)}
a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}
.container{max-width:1150px;margin:0 auto;padding:0 16px}
.site-header{position:sticky;top:0;background:rgba(7,9,17,.9);backdrop-filter:blur(8px);border-bottom:1px solid #0b0f1a;z-index:50}
.header-inner{display:flex;justify-content:space-between;align-items:center;height:60px}
.brand{display:flex;gap:8px;align-items:center;color:var(--ink);font-weight:800}
.nav{display:flex;gap:16px;flex-wrap:wrap}
.hero{padding:52px 0}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.pad{padding:18px}
.h1{font-size:34px;line-height:1.15;margin:10px 0 10px;font-weight:900}
.h2{font-size:22px;margin:18px 0 8px}
.sub{color:var(--muted)}
.grid{display:grid;gap:16px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:900px){.grid-3{grid-template-columns:1fr 1fr}}@media (max-width:640px){.grid-3,.grid-2{grid-template-columns:1fr}}
input,select,textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid #1b2342;background:#0a0f21;color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand1),var(--brand2));color:#001018;border:none;padding:12px 14px;border-radius:12px;font-weight:800;cursor:pointer;box-shadow:0 12px 24px rgba(0,0,0,.35)}
.results{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}.result{background:#0a0f21;border:1px solid #142042;border-radius:12px;padding:14px}.result .big{font-size:22px;font-weight:800}
.kicker{font-size:12px;color:#9fb2d1}.help{background:#0a0f21;border:1px solid #142042;border-radius:12px;padding:12px;margin-top:10px}
.help summary{cursor:pointer;font-weight:800}.help ul{margin:8px 0 8px 20px}
.section{padding:18px 0}.content{line-height:1.6;color:#d9e4ff}.content h3{margin-top:18px}
.site-footer{margin-top:40px;border-top:1px solid #0b0f1a;background:#060813}.site-footer .grid{grid-template-columns:2fr 1fr 1fr}
.small{font-size:12px;color:#8aa0c7}

/* Print-friendly styles */
@media print {
  .site-header, .site-footer, nav, .help details>summary, .btn, .nav, .header-inner { display: none !important; }
  body { background: #fff; color:#000; }
  .card, .pad { box-shadow:none !important; border:none !important; }
  .results { break-inside: avoid; }
}