*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#14211F;background:#fff;line-height:1.5}
a{color:#0E6B63}a:hover{color:#0A4F49}
.contenedor{max-width:1100px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid #DDE3E1}
header .contenedor{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding-top:14px;padding-bottom:14px}
.marca{font-weight:800;font-size:20px;text-decoration:none;color:#14211F}
nav a{margin-left:16px;font-weight:600;text-decoration:none;color:#14211F}
main{padding:28px 0 56px}
h1{font-size:clamp(28px,5vw,42px);line-height:1.15;letter-spacing:-.02em;margin:0 0 10px}
.intro{color:#4A5856;font-size:18px;max-width:700px;margin:0 0 28px}
.calculadora{display:flex;flex-wrap:wrap;gap:20px}
.panel{flex:1 1 360px;min-width:0;border:1px solid #DDE3E1;border-radius:14px;padding:22px}
.resultado{background:#F3F6F5;border:0}
label{display:block;font-weight:700;margin:14px 0 6px}
input{width:100%;font:inherit;font-size:18px;padding:12px 14px;border:1px solid #C5CFCC;border-radius:10px}
.ayuda{font-size:14px;color:#4A5856;margin:6px 0 0}
.total{font-size:44px;font-weight:800;color:#0E6B63;margin:4px 0 14px}
.fila{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid #DDE3E1}
.aviso{font-size:14px;color:#4A5856;margin-top:40px;max-width:700px}
.error{color:#9B1C1C;font-weight:600}
.tarjetas{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.tarjeta{display:block;border:1px solid #DDE3E1;border-radius:14px;padding:20px;text-decoration:none;color:#14211F}
.tarjeta strong{display:block;font-size:18px;margin-bottom:6px}
footer{border-top:1px solid #DDE3E1;padding:24px 0;color:#4A5856;font-size:14px}