*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Arial,sans-serif;color:#1d2a35;line-height:1.5}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}section{padding:56px 0}.alt{background:#f2f6f9}
.nav{background:#fff;border-bottom:1px solid #e3e8ee;position:sticky;top:0;z-index:5}.nav .wrap{display:flex;align-items:center;gap:12px;height:60px}
.nav nav{margin-left:auto;display:flex;gap:18px}.nav a{color:#1d2a35;text-decoration:none}.demo{background:#ffb020;font-size:11px;padding:2px 6px;border-radius:4px;font-weight:700}
.hero{background:linear-gradient(135deg,#0b5d7a,#13a0a0);color:#fff}.hero .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center}
.hero h1{font-size:44px;margin:0 0 12px}.hero-img{border:2px dashed #ffffff88;border-radius:12px;height:240px;display:grid;place-items:center}
.btn{display:inline-block;background:#ff7a1a;color:#fff;border:0;padding:12px 22px;border-radius:8px;font-weight:600;text-decoration:none;cursor:pointer;font-size:16px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid #e3e8ee;border-radius:12px;padding:22px}
.card .ic{font-size:30px}form.card{display:grid;grid-template-columns:1fr 1fr;gap:14px}form label{display:flex;flex-direction:column;font-size:14px;font-weight:600;gap:4px}
input,select{padding:10px;border:1px solid #c9d3dc;border-radius:6px;font:inherit}form button{grid-column:1/-1;justify-self:start}
#result{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}table{width:100%;border-collapse:collapse}td{padding:6px 0;border-bottom:1px solid #eef}td:last-child{text-align:right}
.tot td{font-weight:700;border-top:2px solid #1d2a35}.tag{color:#b26500;font-size:12px}.mail{font-family:ui-monospace,monospace;font-size:13px;background:#1d2a35;color:#d8f3ff;border-radius:10px;padding:18px;white-space:pre-wrap}
details{border-bottom:1px solid #e3e8ee;padding:12px 0}summary{font-weight:600;cursor:pointer}footer{background:#1d2a35;color:#cdd;padding:22px 0;font-size:14px}
@media(max-width:760px){.hero .wrap,.cards,form.card,#result{grid-template-columns:1fr}.nav nav{display:none}.hero h1{font-size:32px}}