/* =========== RESET & BASE =========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  background: #0a0f1e;
  color: #e2e8f0;
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* =========== TOKENS =========== */
:root {
  --blue:      #3b82f6;
  --blue-dark: #1d4ed8;
  --cyan:      #22d3ee;
  --green:     #22c55e;
  --accent:    #6366f1;
  --surface0:  #0a0f1e;
  --surface1:  #0f172a;
  --surface2:  #1e293b;
  --surface3:  #334155;
  --text-1:    #f1f5f9;
  --text-2:    #94a3b8;
  --text-3:    #64748b;
  --radius:    12px;
  --shadow:    0 4px 24px rgba(0,0,0,.45);
}

/* =========== UTILITIES =========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.gradient-text {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.75rem; border-radius: 8px;
  font-size: .95rem; font-weight: 600; cursor: pointer;
  border: none; transition: all .22s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--accent));
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,.45); }
.btn-ghost {
  background: transparent; color: var(--text-1);
  border: 1.5px solid var(--surface3);
}
.btn-ghost:hover { background: var(--surface2); border-color: var(--blue); color: var(--blue); }

/* =========== HEADER =========== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,15,30,.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--surface2);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  font-size: 1.15rem; font-weight: 800; color: var(--text-1);
  display: flex; align-items: center; gap: .4rem;
}
.logo-icon { color: var(--blue); font-size: 1.3rem; }
.logo-accent { color: var(--cyan); }
.main-nav { display: flex; gap: 2rem; }
.nav-link { font-size: .9rem; font-weight: 500; color: var(--text-2); transition: color .2s; }
.nav-link:hover, .nav-link.active { color: var(--text-1); }
.nav-link.active { color: var(--blue); }
.nav-toggle { display: none; background: none; border: none; color: var(--text-1); font-size: 1.5rem; cursor: pointer; }

/* =========== HERO =========== */
.hero {
  position: relative; min-height: 88vh;
  display: flex; align-items: center;
  overflow: hidden; padding: 6rem 0 5rem;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 50%, rgba(59,130,246,.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 60% at 80% 30%, rgba(99,102,241,.14) 0%, transparent 70%),
    var(--surface0);
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero-content { position: relative; max-width: 820px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(59,130,246,.15); border: 1px solid rgba(59,130,246,.35);
  color: var(--blue); font-size: .8rem; font-weight: 600;
  padding: .35rem 1rem; border-radius: 999px; margin-bottom: 1.5rem;
}
.hero-title {
  font-family: 'Merriweather', serif;
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700; line-height: 1.2;
  color: var(--text-1); margin-bottom: 1.25rem;
}
.hero-sub { font-size: 1.1rem; color: var(--text-2); max-width: 600px; margin-bottom: 2rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3.5rem; }
.hero-stats { display: flex; gap: 3rem; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; }
.stat-num {
  font-size: 1.6rem; font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: .78rem; color: var(--text-3); margin-top: .2rem; }

/* =========== SECTIONS =========== */
.section { padding: 5rem 0; }
.section-dark { background: var(--surface1); }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 {
  font-family: 'Merriweather', serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--text-1); margin: .5rem 0 .75rem;
}
.section-header p { color: var(--text-2); font-size: .95rem; max-width: 560px; margin: 0 auto; }
.section-header.light h2 { color: #fff; }
.section-header.light p { color: #94a3b8; }
.tag {
  display: inline-block;
  background: rgba(59,130,246,.15); border: 1px solid rgba(59,130,246,.3);
  color: var(--blue); font-size: .75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em;
  padding: .3rem .9rem; border-radius: 999px; margin-bottom: .5rem;
}

/* =========== CARDS =========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--surface1); border: 1px solid var(--surface2);
  border-radius: var(--radius); padding: 1.75rem;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  opacity: 0; transform: translateY(20px);
}
.card.visible { opacity: 1; transform: translateY(0); transition: opacity .45s ease, transform .45s ease, border-color .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); border-color: var(--blue); box-shadow: 0 8px 32px rgba(59,130,246,.18); }
.card-featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(59,130,246,.08), rgba(99,102,241,.08));
  border-color: rgba(59,130,246,.3);
}
.card-badge {
  display: inline-block;
  background: var(--blue); color: #fff;
  font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  padding: .25rem .75rem; border-radius: 6px; margin-bottom: 1rem;
}
.card-meta { display: flex; gap: 1rem; align-items: center; margin-bottom: .75rem; }
.card-cat { font-size: .75rem; font-weight: 700; color: var(--cyan); text-transform: uppercase; letter-spacing: .07em; }
.card-date { font-size: .75rem; color: var(--text-3); }
.card-title { font-size: 1.15rem; font-weight: 700; color: var(--text-1); margin-bottom: .75rem; line-height: 1.4; }
.card-title a { transition: color .2s; }
.card-title a:hover { color: var(--blue); }
.card-excerpt { font-size: .88rem; color: var(--text-2); line-height: 1.6; margin-bottom: 1rem; }
.card-tags { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.chip {
  background: var(--surface2); color: var(--text-2);
  font-size: .72rem; padding: .25rem .7rem; border-radius: 6px;
}
.card-readmore { font-size: .85rem; font-weight: 600; color: var(--blue); transition: gap .2s; }
.card-readmore:hover { color: var(--cyan); }

/* =========== SOURCES =========== */
.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.source-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--surface2); border: 1px solid var(--surface3);
  border-radius: var(--radius); padding: 1.1rem 1.25rem;
  transition: all .22s;
  opacity: 0; transform: translateY(16px);
}
.source-card.visible { opacity: 1; transform: translateY(0); transition: opacity .4s ease, transform .4s ease, border-color .22s; }
.source-card:hover { border-color: var(--blue); background: rgba(59,130,246,.08); }
.source-icon { font-size: 1.6rem; flex-shrink: 0; }
.source-card div { display: flex; flex-direction: column; }
.source-card strong { font-size: .9rem; color: var(--text-1); }
.source-card span { font-size: .78rem; color: var(--text-3); margin-top: .15rem; }

/* =========== NEWSLETTER =========== */
.newsletter-section { background: var(--surface0); border-top: 1px solid var(--surface2); }
.newsletter-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem; flex-wrap: wrap;
}
.newsletter-text h2 { font-size: 1.4rem; font-weight: 700; color: var(--text-1); }
.newsletter-text p { font-size: .9rem; color: var(--text-2); margin-top: .35rem; }
.newsletter-form { display: flex; gap: .75rem; flex-wrap: wrap; }
.newsletter-form input {
  padding: .75rem 1.25rem; background: var(--surface2);
  border: 1.5px solid var(--surface3); border-radius: 8px;
  color: var(--text-1); font-size: .9rem; min-width: 240px;
  outline: none; transition: border-color .2s;
}
.newsletter-form input:focus { border-color: var(--blue); }
.newsletter-note { font-size: .85rem; }

/* =========== ARTICLE PAGE =========== */
.article-hero {
  background: linear-gradient(135deg, rgba(59,130,246,.1), rgba(99,102,241,.1)), var(--surface1);
  border-bottom: 1px solid var(--surface2);
  padding: 4rem 0 3rem;
}
.article-hero-meta { display: flex; gap: 1rem; align-items: center; margin-bottom: 1.25rem; flex-wrap: wrap; }
.article-hero-tag { font-size: .75rem; font-weight: 700; color: var(--cyan); text-transform: uppercase; letter-spacing: .08em; }
.article-hero-date { font-size: .8rem; color: var(--text-3); }
.article-hero-title {
  font-family: 'Merriweather', serif;
  font-size: clamp(1.5rem, 3.5vw, 2.6rem);
  color: var(--text-1); line-height: 1.3; max-width: 800px; margin-bottom: 1.25rem;
}
.article-hero-lead { font-size: 1.05rem; color: var(--text-2); max-width: 680px; line-height: 1.7; }

.article-layout { display: grid; grid-template-columns: 1fr 280px; gap: 3rem; padding: 4rem 0; }
.article-body h2 {
  font-family: 'Merriweather', serif;
  font-size: 1.5rem; color: var(--text-1); margin: 2.5rem 0 1rem;
  padding-bottom: .5rem; border-bottom: 1px solid var(--surface2);
}
.article-body h3 { font-size: 1.1rem; color: var(--text-1); margin: 1.75rem 0 .75rem; }
.article-body p { font-size: .95rem; color: var(--text-2); margin-bottom: 1rem; line-height: 1.75; }
.article-body ul, .article-body ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.article-body li { font-size: .93rem; color: var(--text-2); line-height: 1.7; margin-bottom: .5rem; }
.article-body strong { color: var(--text-1); }
.article-body a { color: var(--blue); text-decoration: underline; }
.article-body a:hover { color: var(--cyan); }

/* TABLE */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; border-radius: var(--radius); border: 1px solid var(--surface2); }
.article-body table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.article-body th {
  background: var(--surface2); color: var(--text-1);
  padding: .75rem 1rem; text-align: left; font-weight: 600;
}
.article-body td { padding: .7rem 1rem; color: var(--text-2); border-top: 1px solid var(--surface2); }
.article-body tr:hover td { background: rgba(59,130,246,.04); }

/* SIDEBAR */
.article-sidebar { position: sticky; top: 80px; height: fit-content; }
.sidebar-box {
  background: var(--surface1); border: 1px solid var(--surface2);
  border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.5rem;
}
.sidebar-box h4 { font-size: .85rem; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 1rem; }
.toc-list { list-style: none; }
.toc-list li { margin-bottom: .5rem; }
.toc-list a { font-size: .82rem; color: var(--text-2); transition: color .2s; line-height: 1.5; }
.toc-list a:hover { color: var(--blue); }
.ref-list { list-style: none; }
.ref-list li { margin-bottom: .6rem; }
.ref-list a { font-size: .78rem; color: var(--text-3); display: block; line-height: 1.5; transition: color .2s; }
.ref-list a:hover { color: var(--cyan); }

/* =========== TENDENCIAS PAGE =========== */
.page-hero {
  background: linear-gradient(135deg, rgba(34,211,238,.08), rgba(99,102,241,.08)), var(--surface1);
  border-bottom: 1px solid var(--surface2);
  padding: 3.5rem 0 3rem; text-align: center;
}
.page-hero h1 { font-family: 'Merriweather', serif; font-size: clamp(1.8rem,3.5vw,2.8rem); color: var(--text-1); margin-bottom: .75rem; }
.page-hero p { font-size: 1rem; color: var(--text-2); max-width: 580px; margin: 0 auto; }

.trends-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.trend-card {
  background: var(--surface1); border: 1px solid var(--surface2);
  border-radius: var(--radius); padding: 1.75rem;
  transition: all .25s;
}
.trend-card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: 0 8px 32px rgba(34,211,238,.12); }
.trend-num { font-size: 2.5rem; font-weight: 900; color: rgba(59,130,246,.2); display: block; margin-bottom: .5rem; }
.trend-icon { font-size: 2rem; margin-bottom: .75rem; display: block; }
.trend-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-1); margin-bottom: .6rem; }
.trend-card p { font-size: .85rem; color: var(--text-2); line-height: 1.65; }
.trend-card .trend-stat { display: inline-block; margin-top: .75rem; font-size: .8rem; font-weight: 700; color: var(--cyan); background: rgba(34,211,238,.1); padding: .25rem .65rem; border-radius: 6px; }

/* =========== SOBRE PAGE =========== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.about-text h2 { font-family: 'Merriweather', serif; font-size: 1.8rem; color: var(--text-1); margin-bottom: 1rem; }
.about-text p { font-size: .93rem; color: var(--text-2); line-height: 1.75; margin-bottom: 1rem; }
.about-visual {
  background: linear-gradient(135deg, rgba(59,130,246,.12), rgba(99,102,241,.12));
  border: 1px solid rgba(59,130,246,.2);
  border-radius: 16px; padding: 2.5rem; text-align: center;
}
.about-visual .big-icon { font-size: 5rem; display: block; margin-bottom: 1rem; }
.about-visual h3 { font-size: 1.2rem; color: var(--text-1); margin-bottom: .5rem; }
.about-visual p { font-size: .85rem; color: var(--text-2); }

/* =========== FOOTER =========== */
.site-footer-bottom { background: var(--surface1); border-top: 1px solid var(--surface2); }
.footer-inner {
  display: grid; grid-template-columns: 1fr auto;
  gap: 3rem; padding: 3rem 0 2rem; align-items: start;
}
.footer-brand .logo { margin-bottom: .75rem; }
.footer-brand p { font-size: .82rem; color: var(--text-3); max-width: 300px; line-height: 1.6; }
.footer-links { display: flex; gap: 3rem; }
.footer-col { display: flex; flex-direction: column; gap: .6rem; }
.footer-col h4 { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); margin-bottom: .25rem; }
.footer-col a { font-size: .82rem; color: var(--text-3); transition: color .2s; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom-bar {
  border-top: 1px solid var(--surface2); padding: 1rem 0;
}
.footer-bottom-bar .container {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .75rem; color: var(--text-3); flex-wrap: wrap; gap: .5rem;
}

/* =========== RESPONSIVE =========== */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: var(--surface1); border-bottom: 1px solid var(--surface2); padding: 1.5rem; gap: 1rem; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .hero-stats { gap: 1.5rem; }
  .newsletter-inner { flex-direction: column; }
  .footer-links { flex-wrap: wrap; gap: 1.5rem; }
  .card-featured { grid-column: auto; }
}