/* =========================================================
   BrújulaCripto — Hoja de estilos principal
   Sitio de noticias, guías y análisis sobre Bitcoin y XRP
   ========================================================= */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-alt: #eef1f6;
  --text: #10131a;
  --text-muted: #5b6472;
  --border: #e2e6ec;
  --primary: #142850;
  --primary-light: #1e3a8a;
  --accent-btc: #f7931a;
  --accent-xrp: #23a9e0;
  --accent: #0d9488;
  --danger: #b91c1c;
  --radius: 10px;
  --max-content: 1180px;
  --max-shell: 1560px;
  --rail-width: 170px;
  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  /* Escala tipográfica: usada en los titulares principales del sitio */
  --fs-xs: .78rem;
  --fs-sm: .88rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  font-size: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --surface: #121826;
    --surface-alt: #182136;
    --text: #eef1f6;
    --text-muted: #a1acc0;
    --border: #263049;
    --primary-light: #7fa8ff;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.25; color: var(--text); }
.container { max-width: var(--max-content); margin: 0 auto; padding: 0 20px; }

/* ---------- Skip link (accesibilidad) ---------- */
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--primary);
  color: #fff; padding: 10px 16px; z-index: 999; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Layout general con raíles de anuncios ---------- */
.page-shell {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 14px;
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 0 8px;
}
.site-wrap {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 1280px;
  width: 100%;
  background: var(--bg);
}
.ad-rail {
  display: none;
  flex: 0 0 var(--rail-width);
  width: var(--rail-width);
}
@media (min-width: 1300px) {
  .ad-rail { display: block; }
}
.ad-rail .ad-slot {
  position: sticky;
  top: 96px;
}

/* ---------- Bloques de anuncio (placeholders AdSense) ---------- */
.ad-slot {
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  min-height: 250px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8px;
}
.ad-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.ad-in-content {
  margin: 32px auto;
  max-width: 820px;
}
.ad-in-content .ad-slot { min-height: 120px; }
.adsbygoogle { display: block; }

/* ---------- Header / navegación ---------- */
.site-header {
  background: var(--primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 18px 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.55rem;
  color: #fff;
  flex: none;
}
.logo .logo-mark {
  display: inline-flex;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-btc), var(--accent-xrp));
  align-items: center; justify-content: center;
  font-size: 20px;
}
.logo:hover { text-decoration: none; opacity: .92; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 1.1rem;
  cursor: pointer;
}
.main-nav {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 6px;
  scrollbar-width: thin;
}
.main-nav a {
  color: #e7ecf7;
  white-space: nowrap;
  padding: 11px 15px;
  border-radius: 8px;
  font-size: .98rem;
  font-weight: 600;
  letter-spacing: .01em;
  position: relative;
  transition: background-color .15s ease, color .15s ease;
}
.main-nav a:hover, .main-nav a.active {
  background: rgba(255,255,255,.14);
  text-decoration: none;
  color: #fff;
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-btc), var(--accent-xrp));
}
.topbar {
  background: #0b1220;
  color: #b9c2d6;
  font-size: .78rem;
  text-align: center;
  padding: 5px 10px;
}
.topbar a { color: #ffd27a; }

@media (max-width: 880px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    position: absolute;
    left: 0; top: 100%;
    background: var(--primary);
    padding: 8px 12px 16px;
  }
  .main-nav.open { display: flex; }
  .header-inner { flex-wrap: wrap; }
}

/* ---------- Hero / cabeceras de página ---------- */
.hero {
  background: radial-gradient(circle at 20% 20%, #1c3a72 0%, var(--primary) 60%);
  color: #fff;
  padding: 46px 20px 40px;
}
.hero .container { max-width: 1000px; }
.hero h1 { color: #fff; font-size: clamp(1.9rem, 3.6vw, 2.75rem); margin: 0 0 10px; }
.hero p { color: #d6dfef; max-width: 700px; margin: 0 0 6px; }
.badge {
  display: inline-block;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  font-size: .75rem;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  font-weight: 600;
}
.page-header {
  padding: 34px 20px 26px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.page-header h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin: 6px 0 10px; }
.page-header p { color: var(--text-muted); max-width: 720px; }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  font-size: .82rem;
  color: var(--text-muted);
  margin: 14px 0;
}
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--primary-light); }

/* ---------- Secciones y tarjetas ---------- */
main { padding: 30px 0 50px; }
.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}
.section-title h2 { margin: 0; font-size: 1.5rem; }
.section-title a { font-size: .85rem; font-weight: 700; }

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  align-items: start;
  gap: 18px;
}
@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(20,40,80,.14); text-decoration: none; }
.card-thumb {
  height: 130px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.4rem;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.card-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-body { padding: 14px 16px 18px; flex: 1; display: flex; flex-direction: column; }
.card-cat {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .06em;
  color: var(--accent); font-weight: 800; margin-bottom: 6px;
}
.card h3 { font-size: 1.08rem; margin: 0 0 8px; color: var(--text); }
.card p { color: var(--text-muted); font-size: .88rem; margin: 0 0 10px; flex: 1; }
.card-meta { font-size: .75rem; color: var(--text-muted); }

.thumb-btc { background: linear-gradient(135deg,#f7931a,#c9720b); }
.thumb-xrp { background: linear-gradient(135deg,#23a9e0,#0f6b91); }
.thumb-reg { background: linear-gradient(135deg,#6d5bd0,#3f2f8f); }
.thumb-guia { background: linear-gradient(135deg,#0d9488,#0b6b62); }
.thumb-exch { background: linear-gradient(135deg,#e0527a,#9c1f45); }
.thumb-wallet { background: linear-gradient(135deg,#4b5563,#1f2937); }
.thumb-fisc { background: linear-gradient(135deg,#b45309,#7a3606); }
.thumb-trading { background: linear-gradient(135deg,#2563eb,#173e8f); }
.thumb-mineria { background: linear-gradient(135deg,#65a30d,#3f6607); }
.thumb-glosario { background: linear-gradient(135deg,#0891b2,#065e6e); }
.thumb-meme { background: linear-gradient(135deg,#ec4899,#7e22ce); }

/* ---------- Categorías (pills) ---------- */
.cat-pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.cat-pill {
  background: var(--surface); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 999px; font-size: .85rem; font-weight: 700;
  color: var(--text);
}
.cat-pill:hover { border-color: var(--primary-light); text-decoration: none; }

/* ---------- Artículo ---------- */
.article-head { max-width: 820px; margin: 0 auto; padding: 30px 0 10px; }
.article-head .cat-tag {
  display: inline-block; font-size: .72rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .05em; color: #fff; background: var(--accent); padding: 4px 10px; border-radius: 6px;
}
.article-head h1 { font-size: clamp(1.85rem, 3.6vw, 2.6rem); margin: 14px 0 10px; }
.article-meta { color: var(--text-muted); font-size: .86rem; display: flex; flex-wrap: wrap; gap: 14px; }

.article-body { max-width: 820px; margin: 0 auto; font-size: 1.125rem; }
.article-body h2 { margin-top: 2.1em; font-size: 1.5rem; border-left: 4px solid var(--accent); padding-left: 12px; }
.article-body h3 { margin-top: 1.6em; font-size: 1.22rem; }
.article-body p { margin: 1em 0; }
.article-body ul, .article-body ol { margin: 1em 0; padding-left: 1.4em; }
.article-body li { margin-bottom: .4em; }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .92rem; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.article-body th { background: var(--surface-alt); }
.article-body blockquote {
  border-left: 4px solid var(--primary-light);
  background: var(--surface-alt);
  margin: 1.4em 0; padding: 10px 16px; border-radius: 0 8px 8px 0; color: var(--text-muted);
}

.callout {
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 1.6em 0;
  border: 1px solid var(--border);
  background: var(--surface-alt);
}
.callout.warning { border-color: #f4c56b; background: #fff8e8; color: #6b4c00; }
.callout.danger { border-color: #eaa; background: #fdecec; color: var(--danger); }
@media (prefers-color-scheme: dark) {
  .callout.warning { background: #2a2210; color: #f0d68c; }
  .callout.danger { background: #2a1414; color: #f3a9a9; }
}
.callout strong { display: block; margin-bottom: 4px; }

.faq dt { font-weight: 700; margin-top: 14px; }
.faq dd { margin: 4px 0 0; color: var(--text-muted); }

.toc {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 1.6em 0;
  font-size: .92rem;
}
.toc summary { font-weight: 800; cursor: pointer; }
.toc ol { margin: 10px 0 0; padding-left: 1.2em; }

.author-box {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; margin: 2em 0;
}
.author-avatar {
  width: 46px; height: 46px; border-radius: 50%; flex: none;
  background: linear-gradient(135deg, var(--accent-btc), var(--accent-xrp));
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800;
}
.author-box h4 { margin: 0 0 4px; font-size: .95rem; }
.author-box p { margin: 0; font-size: .84rem; color: var(--text-muted); }

/* ---------- CTA / afiliación ---------- */
.cta-box {
  background: linear-gradient(135deg, var(--primary), #234a8f);
  color: #fff; border-radius: var(--radius); padding: 22px 24px; margin: 2em 0;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
}
.cta-box h3 { color: #fff; margin: 0 0 4px; }
.cta-box p { margin: 0; color: #d6dfef; font-size: .9rem; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; font-weight: 700;
  padding: 10px 18px; border-radius: 8px; font-size: .9rem; white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(13,148,136,.3); }
.btn-outline {
  display: inline-block; border: 1.5px solid #fff; color: #fff; font-weight: 700;
  padding: 9px 16px; border-radius: 8px; font-size: .9rem;
  transition: background-color .15s ease;
}
.btn-outline:hover { text-decoration: none; background: rgba(255,255,255,.12); }

/* ---------- Newsletter ---------- */
.newsletter {
  background: var(--surface-alt); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-align: center; margin: 40px 0;
}
.newsletter form { display: flex; gap: 8px; max-width: 420px; margin: 14px auto 0; flex-wrap: wrap; justify-content: center; }
.newsletter input[type=email] {
  flex: 1 1 220px; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); font-size: .95rem;
}

/* ---------- Formularios (contacto) ---------- */
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-weight: 700; margin-bottom: 6px; font-size: .9rem; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit; font-size: .95rem; background: var(--surface); color: var(--text);
}
.form-field textarea { min-height: 140px; resize: vertical; }

/* ---------- Tabla comparativa ---------- */
.compare-table-wrap { overflow-x: auto; }

/* ---------- Footer ---------- */
.site-footer {
  background: #0b1220; color: #b9c2d6; margin-top: 40px;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto; padding: 44px 20px 20px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 26px;
}
.footer-inner h5 { color: #fff; font-size: .88rem; text-transform: uppercase; letter-spacing: .05em; margin: 0 0 12px; }
.footer-inner a { color: #b9c2d6; font-size: .88rem; }
.footer-inner a:hover { color: #fff; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-brand p { font-size: .86rem; color: #8a95ac; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid #1c2536; text-align: center; padding: 16px 20px; font-size: .78rem; color: #8a95ac;
}
.footer-disclaimer {
  max-width: 1160px; margin: 0 auto; padding: 0 20px 20px; font-size: .74rem; color: #6f7a90; line-height: 1.6;
}
@media (max-width: 780px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

/* ---------- Cookie banner ---------- */
#cookie-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 500;
  background: #0b1220; color: #e7ecf7; padding: 16px 20px;
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: center;
  box-shadow: 0 -6px 20px rgba(0,0,0,.25);
}
#cookie-banner p { margin: 0; font-size: .86rem; max-width: 620px; }
#cookie-banner a { color: #ffd27a; }
#cookie-banner .btn { padding: 8px 16px; }
#cookie-banner .btn-outline { border-color: #55618a; color: #cdd6ec; padding: 8px 14px; }

/* ---------- Utilidades ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.small { font-size: .82rem; color: var(--text-muted); }
.legal-body h2 { margin-top: 1.8em; }
.legal-body { max-width: 820px; margin: 0 auto; }
.legal-body table { width: 100%; border-collapse: collapse; margin: 1em 0; }
.legal-body th, .legal-body td { border: 1px solid var(--border); padding: 8px; font-size: .9rem; }
mark.fill { background: #fff3b0; padding: 0 3px; border-radius: 3px; }
@media (prefers-color-scheme: dark) { mark.fill { background: #6b5b0f; color: #fff; } }