:root {
  --navy: #1B3A4B;
  --gold: #F2A83C;
  /* Gold (#F2A83C) on cream (#FFF8EF) measures ~1.9:1 contrast — fails WCAG AA (4.5:1 text,
     3:1 UI components) badly. Gold is background/button/dark-bg-text only; --gold-text is the
     dark-amber equivalent for any gold-family text or border on the light background. */
  --gold-text: #8a5a12;
  --cream: #FFF8EF;
  --ink: #2A2A28;
  --border: #E7DCC9;
  --danger-bg: #FBEFE0;
  --danger-border: #E3A94C;
  font-family: -apple-system, "Poppins", "Nunito", "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
a { color: var(--navy); }
a:hover { color: var(--gold-text); }
a:focus-visible, button:focus-visible, input:focus-visible, .btn:focus-visible, .card:focus-visible {
  outline: 3px solid var(--navy);
  outline-offset: 2px;
}

.site-header { background: var(--cream); border-bottom: 2px solid var(--border); padding: 18px 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.logo { font-weight: 800; font-size: 1.4rem; text-decoration: none; letter-spacing: -0.01em; }
.logo .navy { color: var(--navy); }
.logo .gold { color: var(--gold-text); margin-left: 6px; }
.logo:hover { opacity: 0.85; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { text-decoration: none; color: var(--navy); font-weight: 600; font-size: 0.95rem; }
nav a.active { color: var(--gold-text); border-bottom: 2px solid var(--gold-text); }
nav a:hover { color: var(--gold-text); }

.content { padding: 40px 20px 60px; }
.content h1 { color: var(--navy); font-size: 2rem; margin-bottom: 0.3em; letter-spacing: -0.01em; }
.content h2 { color: var(--navy); font-size: 1.3rem; margin-top: 1.6em; }
.lead { font-size: 1.15rem; color: #4a4a46; }

.hero { padding: 30px 0 10px; text-align: left; }
.hero h1 { font-size: 2.3rem; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 20px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 8px; text-decoration: none;
  font-weight: 700; border: 2px solid var(--navy); color: var(--navy); background: transparent;
}
.btn:hover { background: var(--navy); color: var(--cream); }
.btn.primary { background: var(--gold); border-color: var(--gold); color: var(--navy); }
.btn.primary:hover { background: #e0952e; border-color: #e0952e; color: var(--navy); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin: 30px 0; padding: 0; }
.card {
  display: block; background: #fff; border: 1px solid var(--border); border-radius: 10px;
  padding: 20px; text-decoration: none; color: var(--ink);
}
.card:hover { border-color: var(--gold); transform: translateY(-2px); }
.card h2 { margin-top: 0; font-size: 1.1rem; color: var(--navy); }
.card p { margin-bottom: 0; font-size: 0.95rem; color: #555; }

.callout {
  border-radius: 10px; padding: 18px 20px; margin: 24px 0; font-size: 0.95rem;
}
.callout.warn { background: var(--danger-bg); border: 1.5px solid var(--danger-border); }
.callout.warn strong { color: var(--gold-text); }
.callout.note { background: #EEF3F5; border: 1.5px solid #C3D2D8; }
.callout.note strong { color: var(--navy); }
.callout.cta { background: var(--navy); border: 1.5px solid var(--navy); color: var(--cream); }
.callout.cta p { margin: 0; }
.callout.cta strong { color: #fff; }
.callout.cta a {
  color: var(--navy); background: var(--gold); font-weight: 700; text-decoration: none;
  padding: 2px 10px; border-radius: 6px; white-space: nowrap;
}
.callout.cta a:hover { background: #e0952e; color: var(--navy); }

.share-row { margin: 18px 0; }
/* Navy on WhatsApp green measures 6.04:1 (AA); hover reuses the site's navy/cream
   button pattern because a darker green fails 4.5:1 for 16px bold text. */
.btn.whatsapp { background: #25D366; border-color: #25D366; color: var(--navy); }
.btn.whatsapp:hover { background: var(--navy); border-color: var(--navy); color: var(--cream); }

.scope-note { font-size: 0.92rem; color: #4a4a46; background: #F4EFE3; border-left: 3px solid var(--gold-text); padding: 10px 14px; margin: 18px 0; }

.source-line { font-size: 0.85rem; color: #6b6b66; border-top: 1px solid var(--border); padding-top: 14px; margin-top: 36px; }

.tool-form { display: flex; flex-direction: column; gap: 12px; margin: 20px 0; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.tool-form fieldset { border: none; margin: 10px 0 2px; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.tool-form fieldset:first-of-type { margin-top: 0; }
.tool-form .tool-question { font-weight: 700; color: var(--navy); margin: 0 0 2px; padding: 0; }
.tool-form label { display: flex; align-items: center; gap: 10px; font-size: 1rem; cursor: pointer; }
.tool-form input[type="radio"] { width: 18px; height: 18px; accent-color: var(--gold-text); }
.tool-form button { align-self: flex-start; margin-top: 8px; cursor: pointer; font-size: 1rem; }

.resultado { padding: 16px 18px; border-radius: 8px; font-weight: 700; font-size: 1.05rem; }
.resultado.exento { background: #E4F3E6; color: #1E6B2E; border: 1.5px solid #7FC08D; }
.resultado.probable { background: #FFF3D6; color: #8A6A12; border: 1.5px solid #E3C263; }
.resultado.riesgo { background: var(--danger-bg); color: #8a3a12; border: 1.5px solid var(--danger-border); }
.resultado.gravado { background: #FBE7E7; color: #A3312B; border: 1.5px solid #E38C8C; }

.site-footer { background: var(--navy); color: #d9e2e6; padding: 30px 0; margin-top: 40px; }
.site-footer .disclosure { font-size: 0.85rem; line-height: 1.6; max-width: 760px; }
.site-footer a { color: var(--gold); }
.site-footer .meta { font-size: 0.78rem; color: #9fb3bc; margin-top: 12px; }

@media (max-width: 640px) {
  .content h1, .hero h1 { font-size: 1.6rem; }
  .site-header .wrap { flex-direction: column; align-items: flex-start; }
}