:root{--petrol:#1a4f54;--deep:#0f3b3f;--neon:#d4ff00;--ink:#0f172a;--muted:#5a6e70;--soft:#edf4f3;--line:#dce7e6;--white:#fff}
*{box-sizing:border-box}
body{margin:0;font-family:Raleway,Arial,sans-serif;color:var(--ink);line-height:1.55;background:#f8fafc}
a{color:inherit}
.wrap{width:min(1120px,calc(100% - 40px));margin:auto}
header{background:var(--deep);color:#fff;padding:18px 0}
nav{display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;text-decoration:none}
.brand img{width:38px;height:38px;object-fit:contain}
nav>a:last-child{color:var(--neon);font-weight:700}
.hero{padding:72px 0 56px;background:linear-gradient(135deg,var(--deep),#1a4f54);color:#fff}
.eyebrow{font-size:12px;letter-spacing:1.8px;text-transform:uppercase;color:var(--neon);font-weight:800}
h1{max-width:900px;font-size:clamp(34px,5vw,58px);line-height:1.05;margin:12px 0 18px}
.hero p{max-width:780px;color:#e6f0ef;font-size:18px}
main{padding:54px 0 80px}
.notice{background:#fff;border:1px solid var(--line);border-left:5px solid var(--neon);padding:20px 22px;border-radius:12px;margin-bottom:28px;color:var(--muted)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}
h2{font-size:25px;margin:0 0 6px}
.intro{color:var(--muted);margin:0 0 24px}
.field{margin:0 0 18px}
.field label{display:block;font-weight:700;margin-bottom:7px}
.field small{display:block;color:var(--muted);margin-top:5px}
input{width:100%;border:1px solid #b9cdca;border-radius:9px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
input:focus{outline:3px solid rgba(212,255,0,.35);border-color:var(--petrol)}
.results{background:var(--deep);color:#fff}
.results .intro{color:#c9d9d7}
.metric{padding:17px 0;border-bottom:1px solid rgba(255,255,255,.14)}
.metric span{display:block;color:#c9d9d7;font-size:13px}
.metric strong{font-size:28px;color:#fff}
.metric.highlight strong{color:var(--neon)}
.explain{margin-top:22px;color:#c9d9d7;font-size:14px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;padding:13px 19px;border-radius:8px;text-decoration:none;font-weight:800}
.btn-primary{background:var(--neon);color:var(--ink)}
.btn-secondary{border:1px solid #9bb5b2;color:#fff}
.method{margin-top:28px;background:var(--soft);border-radius:18px;padding:28px}
.method h2{margin-bottom:12px}
.method ul{margin:0;padding-left:20px;color:var(--muted)}
footer{padding:25px 0;background:#0c3034;color:#c9d9d7;font-size:13px}
@media(max-width:780px){.grid{grid-template-columns:1fr}.hero{padding:48px 0}.panel{padding:22px}.wrap{width:min(100% - 28px,1120px)}}