/* ============================================================
   GRUPO FIRME — style.css
   Blog educativo · Glosario de Vocabulario Financiero
   Titular: Sandra Guerrero Bernal
   Dominio: grupofirme.blog
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:       #1B2D45;
  --navy-light: #243A56;
  --indigo:     #3B5BDB;
  --indigo-hover:#2F4CC4;
  --bg-soft:    #F7F8FC;
  --bg-white:   #FFFFFF;
  --text-dark:  #1B2D45;
  --text-body:  #4A5568;
  --text-muted: #718096;
  --border:     #E2E8F0;
  --cat-riesgo:   #E53E3E;
  --cat-ahorro:   #38A169;
  --cat-inversion:#3B5BDB;
  --cat-credito:  #D69E2E;
  --cat-economia: #6B46C1;
  --radius:     6px;
  --shadow:     0 2px 12px rgba(27,45,69,0.08);
  --shadow-card:0 4px 20px rgba(27,45,69,0.10);
  --font-display:'IBM Plex Serif', Georgia, serif;
  --font-body:   'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--indigo); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--indigo); outline-offset: 3px; border-radius: 2px; }

/* ── UTILIDADES ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ── AVISO DE INDEPENDENCIA (banner superior) ── */
.independence-bar {
  background: var(--navy);
  color: #CBD5E0;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-align: center;
  padding: 7px 16px;
  border-bottom: 2px solid var(--indigo);
}
.independence-bar strong { color: #FFFFFF; }

/* ── HEADER ── */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(27,45,69,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.site-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}
.site-logo .logo-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.site-logo .logo-tagline {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.site-logo:hover .logo-name { color: var(--indigo); }
.site-logo:hover { text-decoration: none; }

/* Nav */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-body);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
}
.main-nav a:hover {
  background: var(--bg-soft);
  color: var(--navy);
  text-decoration: none;
}
.main-nav a.active { color: var(--indigo); font-weight: 600; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  color: var(--navy);
  font-size: 1.1rem;
}
@media (max-width: 680px) {
  .main-nav { display: none; flex-direction: column; gap: 0; position: absolute;
    top: 65px; left: 0; right: 0; background: var(--bg-white);
    border-bottom: 1px solid var(--border); padding: 8px 16px 16px; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 12px; border-radius: 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: flex; }
}

/* ── HERO ── */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 60%, #1e3a5f 100%);
  color: #FFFFFF;
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: rgba(59,91,219,0.12);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(59,91,219,0.25);
  border: 1px solid rgba(59,91,219,0.5);
  color: #A5B4FC;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: #FFFFFF;
  max-width: 700px;
  margin-bottom: 18px;
}
.hero h1 em { font-style: italic; color: #A5B4FC; }
.hero-desc {
  font-size: 1.05rem;
  color: #CBD5E0;
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-disclaimer {
  background: rgba(255,255,255,0.07);
  border-left: 3px solid var(--indigo);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
  max-width: 640px;
  font-size: 0.82rem;
  color: #A0AEC0;
  line-height: 1.6;
}
.hero-disclaimer strong { color: #E2E8F0; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}
.stat-label {
  font-size: 0.73rem;
  color: #A0AEC0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ── CATEGORÍAS (filtros visuales) ── */
.category-section {
  background: var(--bg-soft);
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.category-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.category-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 6px;
}
.cat-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1.5px solid;
  background: var(--bg-white);
  cursor: default;
  transition: transform 0.1s;
}
.cat-tag:hover { transform: translateY(-1px); }
.cat-tag.riesgo   { color: var(--cat-riesgo);   border-color: var(--cat-riesgo);   }
.cat-tag.ahorro   { color: var(--cat-ahorro);   border-color: var(--cat-ahorro);   }
.cat-tag.inversion{ color: var(--cat-inversion);border-color: var(--cat-inversion);}
.cat-tag.credito  { color: var(--cat-credito);  border-color: var(--cat-credito);  }
.cat-tag.economia { color: var(--cat-economia); border-color: var(--cat-economia); }
.cat-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* ── ARTÍCULOS GRID ── */
.articles-section { padding: 56px 0 72px; }
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-dark);
}
.section-title span { color: var(--indigo); }
.section-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--indigo);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 24px;
}

/* Tarjeta de artículo / término del glosario */
.article-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

/* La firma única: borde lateral categorizado */
.card-accent {
  height: 4px;
  width: 100%;
}
.card-accent.riesgo    { background: var(--cat-riesgo);    }
.card-accent.ahorro    { background: var(--cat-ahorro);    }
.card-accent.inversion { background: var(--cat-inversion); }
.card-accent.credito   { background: var(--cat-credito);   }
.card-accent.economia  { background: var(--cat-economia);  }

.card-body { padding: 22px 22px 18px; flex: 1; display: flex; flex-direction: column; }
.card-category {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.card-category.riesgo    { color: var(--cat-riesgo);    }
.card-category.ahorro    { color: var(--cat-ahorro);    }
.card-category.inversion { color: var(--cat-inversion); }
.card-category.credito   { color: var(--cat-credito);   }
.card-category.economia  { color: var(--cat-economia);  }

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 10px;
}
.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-body);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 18px;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 22px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}
.card-meta {
  font-size: 0.73rem;
  color: var(--text-muted);
}
.card-meta time { font-weight: 500; }
.card-read-link {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--indigo);
  display: flex;
  align-items: center;
  gap: 4px;
}
.card-read-link:hover { text-decoration: none; color: var(--indigo-hover); }
.card-read-link::after { content: '→'; font-size: 0.9rem; }

/* ── SECCIÓN SOBRE EL PROYECTO ── */
.about-strip {
  background: var(--navy);
  color: #FFFFFF;
  padding: 56px 0;
}
.about-strip-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 720px) {
  .about-strip-inner { grid-template-columns: 1fr; gap: 28px; }
}
.about-strip h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 14px;
  color: #FFFFFF;
}
.about-strip p { color: #A0AEC0; font-size: 0.93rem; line-height: 1.75; margin-bottom: 10px; }
.about-strip p strong { color: #E2E8F0; }
.about-strip-right { display: flex; flex-direction: column; gap: 14px; }
.about-fact {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.fact-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}
.fact-text { font-size: 0.83rem; color: #CBD5E0; line-height: 1.55; }
.fact-text strong { color: #FFFFFF; display: block; margin-bottom: 2px; font-size: 0.88rem; }

/* ── NEWSLETTER ── */
.newsletter-section {
  padding: 56px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.newsletter-inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.newsletter-inner h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.newsletter-inner p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 24px; }
.newsletter-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.newsletter-form input[type="email"] {
  flex: 1;
  min-width: 230px;
  padding: 11px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--bg-white);
  transition: border-color 0.15s;
}
.newsletter-form input[type="email"]:focus {
  outline: none;
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px rgba(59,91,219,0.12);
}
.btn-primary {
  display: inline-block;
  background: var(--indigo);
  color: #FFFFFF;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  padding: 11px 22px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--indigo-hover); }
.newsletter-note {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.5;
}
.newsletter-note a { color: var(--indigo); font-weight: 500; }

/* ── FOOTER ── */
.site-footer {
  background: var(--navy);
  color: #CBD5E0;
  padding: 48px 0 0;
  font-size: 0.85rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand .footer-logo-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 6px;
}
.footer-brand p { line-height: 1.65; margin-bottom: 10px; color: #A0AEC0; font-size: 0.82rem; }
.footer-brand .footer-titular {
  font-size: 0.79rem;
  color: #718096;
  margin-top: 10px;
}
.footer-brand .footer-titular strong { color: #A0AEC0; }
.footer-col h4 {
  color: #FFFFFF;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { color: #A0AEC0; font-size: 0.82rem; transition: color 0.15s; }
.footer-col ul li a:hover { color: #FFFFFF; text-decoration: none; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 0.82rem;
  color: #A0AEC0;
  line-height: 1.5;
}
.footer-contact-item .fc-icon { flex-shrink: 0; margin-top: 2px; }

/* Footer bottom bar */
.footer-bottom {
  padding: 18px 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  color: #718096;
}
.footer-bottom a { color: #718096; }
.footer-bottom a:hover { color: #A0AEC0; text-decoration: none; }
.footer-legal-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-disclaimer {
  width: 100%;
  padding: 12px 0 4px;
  font-size: 0.72rem;
  color: #4A5568;
  line-height: 1.6;
  border-top: 1px solid rgba(255,255,255,0.05);
  margin-top: 8px;
}

/* ── RESPONSIVE ── */
@media (max-width: 480px) {
  .hero { padding: 48px 0 40px; }
  .hero-stats { gap: 20px; }
  .articles-section { padding: 36px 0 48px; }
  .container { padding: 0 16px; }
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}