:root{
  --verde:#0b7a4b;
  --verde-oscuro:#075e3a;
  --verde-claro:#e8f5ee;
  --tinta:#12211a;
  --gris:#5a6b62;
  --borde:#dbe5df;
  --fondo:#f5f8f6;
  --blanco:#ffffff;
  --sombra:0 10px 30px rgba(10,60,40,.08);
  --radio:16px;
  --max:1080px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--tinta);
  background:var(--fondo);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:var(--verde-oscuro)}
a:hover{color:var(--verde)}
h1,h2,h3{line-height:1.15}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--borde);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;text-decoration:none;color:var(--tinta);letter-spacing:-.02em;font-size:1.05rem}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--verde);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800}
.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}
.nav a{text-decoration:none;color:var(--gris);font-weight:600}
.nav a:hover,.nav a[aria-current="page"]{color:var(--verde-oscuro)}

/* Hero */
.hero{padding:64px 0 40px}
.hero h1{font-size:clamp(2rem,4.5vw,3.2rem);letter-spacing:-.03em;margin:0 0 16px}
.hero p{font-size:1.125rem;color:var(--gris);max-width:62ch;margin:0 0 28px}
.badge{display:inline-block;background:var(--verde-claro);color:var(--verde-oscuro);font-weight:700;font-size:.78rem;padding:6px 12px;border-radius:999px;margin-bottom:18px;text-transform:uppercase;letter-spacing:.06em}

/* Botones */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--verde);color:#fff;text-decoration:none;
  font-weight:700;font-size:1rem;padding:13px 22px;border-radius:12px;
  border:1px solid var(--verde);cursor:pointer;
  transition:transform .15s,background .15s;
}
.btn:hover{background:var(--verde-oscuro);color:#fff;transform:translateY(-1px)}
.btn-secondary{background:transparent;color:var(--verde-oscuro);border-color:var(--borde)}
.btn-secondary:hover{background:var(--verde-claro);color:var(--verde-oscuro)}
.btn-small{padding:9px 14px;font-size:.9rem;border-radius:10px}

/* Secciones */
.section{padding:48px 0}
.section h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.02em;margin:0 0 12px}
.section .lead{color:var(--gris);max-width:65ch;margin:0 0 24px}

/* Tarjetas */
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.card{
  background:var(--blanco);border:1px solid var(--borde);border-radius:var(--radio);
  padding:22px;box-shadow:var(--sombra);display:flex;flex-direction:column;gap:8px;
}
.card h3{margin:0;font-size:1.1rem}
.card p{margin:0;color:var(--gris);font-size:.95rem}
.card a{margin-top:auto;font-weight:700;text-decoration:none}
.card .tag{font-size:.72rem;font-weight:700;color:var(--verde-oscuro);background:var(--verde-claro);padding:3px 10px;border-radius:999px;align-self:flex-start;text-transform:uppercase;letter-spacing:.05em}
.card.disabled{opacity:.72}

/* Migas */
.breadcrumbs{font-size:.85rem;color:var(--gris);padding:18px 0 0}
.breadcrumbs a{color:var(--gris);text-decoration:none}
.breadcrumbs a:hover{color:var(--verde-oscuro)}

/* Calculadora */
.calc{background:var(--blanco);border:1px solid var(--borde);border-radius:var(--radio);box-shadow:var(--sombra);padding:24px}
.calc-grid{display:grid;gap:0 20px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-weight:600;font-size:.95rem}
.field input,.field select{
  font:inherit;padding:12px 14px;border:1px solid var(--borde);border-radius:10px;
  background:#fff;color:var(--tinta);width:100%;
}
.field input:focus,.field select:focus{outline:3px solid rgba(11,122,75,.2);border-color:var(--verde)}
.hint{font-size:.85rem;color:var(--gris)}
.check{display:flex;align-items:flex-start;gap:10px;font-size:.95rem;margin:10px 0;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--verde);margin-top:3px;flex:none}
.result{margin-top:22px;background:var(--verde-claro);border:1px solid #bfe3cf;border-radius:14px;padding:20px}
.result .label{font-size:.82rem;font-weight:700;color:var(--verde-oscuro);text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px}
.result .amount{font-size:clamp(1.8rem,5vw,2.6rem);font-weight:800;letter-spacing:-.02em;margin:0;color:var(--tinta);word-break:break-word}
.result .breakdown{margin:14px 0 0;padding:14px 0 0;border-top:1px dashed #a9d6bc;display:grid;gap:6px;font-size:.95rem}
.result .breakdown div{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.result .breakdown span:last-child{font-weight:700}
.result-actions{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap}
.error{color:#9b1c1c;font-size:.9rem;margin-top:8px}
.hidden{display:none!important}

/* Prosa */
.prose{max-width:70ch}
.prose p{margin:0 0 14px;color:#2b3a32}
.prose ul{padding-left:22px;margin:0 0 14px}
.prose li{margin:6px 0}
.prose table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:.95rem;background:#fff;border:1px solid var(--borde);border-radius:12px;overflow:hidden}
.prose th,.prose td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--borde)}
.prose th{background:var(--verde-claro);color:var(--verde-oscuro);font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}
.prose tr:last-child td{border-bottom:0}
.prose td:last-child,.prose th:last-child{text-align:right;white-space:nowrap}
.note{background:#fff8e6;border:1px solid #f0dca8;border-radius:12px;padding:14px 16px;font-size:.92rem;color:#5a4a12}

/* FAQ */
.faq{display:grid;gap:10px}
.faq details{background:#fff;border:1px solid var(--borde);border-radius:12px}
.faq summary{
  cursor:pointer;font-weight:700;padding:16px 18px;list-style:none;
  display:flex;justify-content:space-between;gap:12px;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:700;color:var(--verde);font-size:1.2rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .faq-body{padding:0 18px 16px;color:var(--gris)}

/* Footer */
.site-footer{border-top:1px solid var(--borde);padding:32px 0;margin-top:40px;color:var(--gris);font-size:.9rem}
.footer-inner{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:flex-start}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.footer-links a{color:var(--gris);text-decoration:none}
.footer-links a:hover{color:var(--verde-oscuro)}

@media (max-width:640px){
  .hero{padding:40px 0 24px}
  .section{padding:32px 0}
  .header-inner{min-height:auto;padding:10px 0}
  .nav{font-size:14px;gap:14px}
}

@media print{
  .site-header,.site-footer,.nav,.result-actions,.breadcrumbs{display:none}
  body{background:#fff}
  .calc,.result{box-shadow:none}
}