/* BDL, servicios de diagnóstico estructural
   Paleta tomada del sitio publicado y del kit de marca BDL.
   Todo par de colores usado para texto supera 4,5:1 de contraste. */

:root {
  --navy: #071923;
  --navy-2: #0b2531;
  --cyan: #18b7cf;
  --cyan-deep: #0a5f70;
  --lime: #b8dc68;
  --bg: #f7f9fa;
  --surface: #ffffff;
  --fg: #0c202a;
  --muted: #4c6069;
  --border: #d8e1e4;
  --radius: 12px;
  --maxw: 1080px;
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--cyan-deep); }
a:hover { color: var(--navy); }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(1.9rem, 4.2vw, 2.9rem); }
h2 { font-size: clamp(1.4rem, 2.8vw, 1.95rem); margin-top: 2.2em; }
h3 { font-size: 1.15rem; margin-top: 1.6em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .45em; }

/* Cabecera */
.topbar { background: var(--navy); color: #fff; position: sticky; top: 0; z-index: 50; }
.topbar .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; flex-wrap: wrap; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: #fff; }
.brand .mark { font-size: 1.75rem; font-weight: 700; letter-spacing: -.04em; line-height: 1; }
.brand .tag { font-size: .66rem; text-transform: none; color: var(--lime); max-width: 130px; line-height: 1.15; }
.topnav { display: flex; gap: 20px; margin-left: auto; flex-wrap: wrap; }
.topnav a { color: #dfeaee; text-decoration: none; font-size: .93rem; }
.topnav a:hover { color: var(--cyan); }

/* Botones */
.btn {
  display: inline-block; padding: 13px 22px; border-radius: 999px;
  font-weight: 600; text-decoration: none; border: 2px solid transparent;
  font-size: 1rem;
}
.btn-wa { background: var(--cyan); color: var(--navy); }
.btn-wa:hover { background: var(--lime); color: var(--navy); }
.btn-ghost { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { border-color: var(--lime); color: var(--lime); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--navy-2); color: var(--lime); }

/* Portada y cabezales */
.hero { background: var(--navy); color: #fff; padding: 64px 0 72px; }
.hero h1 { color: #fff; max-width: 20ch; }
.hero .lede { font-size: 1.15rem; color: #cfdee3; max-width: 60ch; }
.eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 600; letter-spacing: .06em;
  color: var(--navy); background: var(--lime); padding: 5px 13px; border-radius: 999px; margin-bottom: 18px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.hero-pills { display: flex; gap: 10px 26px; flex-wrap: wrap; margin-top: 30px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.18); }
.hero-pills span { font-size: .93rem; color: var(--lime); }

/* Respuesta corta, el bloque que citan los motores */
.respuesta {
  background: var(--surface); border-left: 5px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 22px 26px; margin: -34px 0 40px; box-shadow: 0 6px 24px rgba(7,25,35,.10);
  position: relative;
}
.respuesta p { font-size: 1.1rem; margin: 0; }

section { padding: 6px 0; }
.band { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 46px 0; margin-top: 48px; }
.band-navy { background: var(--navy); color: #fff; padding: 52px 0; margin-top: 56px; }
.band-navy h2 { color: #fff; margin-top: 0; }
.band-navy p { color: #cfdee3; }

/* Tarjetas */
.cards { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); margin: 22px 0; padding: 0; list-style: none; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 22px 24px; margin: 0;
}
.card h3 { margin: 0 0 .4em; font-size: 1.08rem; }
.card p { margin: 0; color: var(--muted); font-size: .96rem; }
a.card { display: block; text-decoration: none; color: inherit; }
a.card:hover { border-color: var(--cyan); box-shadow: 0 5px 18px rgba(7,25,35,.09); }
a.card .more { display: inline-block; margin-top: 12px; color: var(--cyan-deep); font-weight: 600; font-size: .93rem; }

/* Pasos numerados */
ol.pasos { list-style: none; counter-reset: p; padding: 0; margin: 20px 0; }
ol.pasos li { counter-increment: p; position: relative; padding-left: 46px; margin-bottom: 16px; }
ol.pasos li::before {
  content: counter(p); position: absolute; left: 0; top: 1px;
  width: 30px; height: 30px; border-radius: 50%; background: var(--navy); color: var(--lime);
  display: grid; place-items: center; font-size: .9rem; font-weight: 700;
}

/* Alcance responsable */
.alcance { background: #fffaf0; border: 1px solid #e9d9b5; border-radius: var(--radius); padding: 22px 26px; margin: 22px 0; }
.alcance h2 { margin-top: 0; }
.alcance ul { margin-bottom: 0; }

/* Preguntas frecuentes */
.faq { border-top: 1px solid var(--border); margin-top: 22px; }
.faq details { border-bottom: 1px solid var(--border); padding: 4px 0; }
.faq summary { cursor: pointer; padding: 16px 0; font-weight: 600; font-size: 1.03rem; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--cyan-deep); font-weight: 700; margin-right: 12px; }
.faq details[open] summary::before { content: "–"; }
.faq .a { padding: 0 0 18px 26px; color: var(--muted); }
.faq .a p:last-child { margin-bottom: 0; }

/* Credibilidad */
.credibilidad { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); margin-top: 20px; }
.credibilidad .item { border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius); padding: 18px 20px; }
.credibilidad .item strong { display: block; color: var(--lime); margin-bottom: 4px; font-size: .97rem; }
.credibilidad .item span { color: #cfdee3; font-size: .92rem; }

/* Cierre con llamado */
.cierre { background: var(--lime); color: var(--navy); padding: 48px 0; margin-top: 56px; }
.cierre h2 { margin-top: 0; color: var(--navy); }
.cierre p { color: #1a2c14; max-width: 60ch; }

/* Migas */
.migas { font-size: .87rem; color: var(--muted); padding: 16px 0 0; }
.migas a { color: var(--muted); }
.migas span { margin: 0 6px; }

/* Ficha lateral */
.ficha { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin: 26px 0; }
.ficha dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 0; }
.ficha dt { font-weight: 600; color: var(--muted); font-size: .9rem; }
.ficha dd { margin: 0; font-size: .95rem; }

/* Pie */
footer.pie { background: var(--navy); color: #cfdee3; padding: 48px 0 30px; margin-top: 0; font-size: .94rem; }
footer.pie a { color: #cfdee3; }
footer.pie a:hover { color: var(--cyan); }
footer.pie h3 { color: #fff; font-size: .97rem; margin: 0 0 .7em; }
.pie-cols { display: grid; gap: 30px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.pie-cols ul { list-style: none; padding: 0; }
.pie-legal { border-top: 1px solid rgba(255,255,255,.15); margin-top: 32px; padding-top: 18px; font-size: .85rem; color: #9db2ba; }

/* Botón flotante de WhatsApp */
.wa-float {
  position: fixed; right: 18px; bottom: 18px; z-index: 60;
  background: var(--cyan); color: var(--navy); font-weight: 700;
  padding: 14px 20px; border-radius: 999px; text-decoration: none;
  box-shadow: 0 6px 22px rgba(7,25,35,.3);
}
.wa-float:hover { background: var(--lime); color: var(--navy); }

.nota { font-size: .9rem; color: var(--muted); }
.figura { background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius); padding: 14px; margin: 24px 0; }
.figura img { width: 100%; height: auto; display: block; border-radius: 8px; }
.figura figcaption { font-size: .86rem; color: var(--muted); margin-top: 10px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 44px 0 52px; }
  .respuesta { margin-top: -26px; padding: 18px 20px; }
  .brand .tag { display: none; }
  .topnav { gap: 14px; }
}