/* =============================================
   TECNOPRACTICA — sistema de diseño
   Base: gris frío técnico · Acento: azul circuito · Detalle: ámbar
   ============================================= */

:root {
  --bg: #F5F6F8;
  --bg-card: #FFFFFF;
  --ink: #171A21;
  --ink-soft: #4B5160;
  --line: #E1E4E9;
  --accent: #2C5CF5;
  --accent-ink: #12306B;
  --amber: #E8912B;
  --ad-bg: #ECEEF2;
  --ad-label: #9AA1AE;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius: 6px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Foco visible para accesibilidad/teclado */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo:hover { text-decoration: none; }
.logo .dot { color: var(--accent); }

.main-nav { display: flex; gap: 22px; }
.main-nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}
.main-nav a:hover { color: var(--accent); text-decoration: none; }

.nav-toggle { display: none; }

/* ---------- Layout general ---------- */
.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

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

main { padding: 36px 0 60px; }

/* ---------- Hero home ---------- */
.hero {
  padding: 46px 0 30px;
  border-bottom: 1px solid var(--line);
}
.hero .kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 12px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  max-width: 720px;
  margin: 0 0 14px;
}
.hero p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0;
}

/* ---------- Tarjetas de artículos ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 30px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.card .tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
}

.card h2 {
  font-size: 1.15rem;
  margin: 0;
}
.card h2 a { color: var(--ink); }
.card h2 a:hover { color: var(--accent); text-decoration: none; }

.card p {
  color: var(--ink-soft);
  font-size: 0.94rem;
  margin: 0;
  flex-grow: 1;
}

.card .meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ad-label);
}

/* ---------- Artículo ---------- */
.article-header {
  padding: 40px 0 20px;
  border-bottom: 1px solid var(--line);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--ink-soft); }

.article-header .tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
}

.article-header h1 {
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  margin: 12px 0 14px;
}

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.article-body { padding-top: 28px; }

.article-body h2 {
  font-size: 1.35rem;
  margin: 38px 0 14px;
}
.article-body h3 {
  font-size: 1.1rem;
  margin: 26px 0 10px;
}
.article-body p { margin: 0 0 18px; color: var(--ink); }
.article-body ul, .article-body ol {
  margin: 0 0 18px;
  padding-left: 22px;
}
.article-body li { margin-bottom: 8px; }

.callout {
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin: 24px 0;
}

/* ---------- Bloques de anuncios ----------
   Sustituye el contenido de cada .ad-slot por tu
   código real de Google AdSense (<ins class="adsbygoogle">...).
   Deja el contenedor .ad-slot tal cual: mantiene el
   tamaño reservado para que la página no salte (evita
   Cumulative Layout Shift) mientras carga el anuncio. */

.ad-slot {
  background: var(--ad-bg);
  border: 1px dashed #C7CCD5;
  border-radius: var(--radius);
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 28px 0;
}

.ad-slot .ad-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ad-label);
}

.ad-slot--leaderboard { min-height: 90px; }
.ad-slot--incontent { min-height: 250px; }
.ad-slot--footer { min-height: 250px; }

/* ---------- Sidebar (para páginas con anuncio lateral) ---------- */
.layout-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 36px;
  align-items: start;
}
.sidebar .ad-slot { position: sticky; top: 90px; min-height: 600px; }

@media (max-width: 860px) {
  .layout-with-sidebar { grid-template-columns: 1fr; }
  .sidebar .ad-slot { position: static; min-height: 250px; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 0;
  margin-top: 40px;
}
.footer-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-soft); }
.footer-links a:hover { color: var(--accent); }

/* ---------- Responsive nav ---------- */
@media (max-width: 640px) {
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 12px 20px 18px;
    gap: 14px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-toggle {
    display: block;
    background: none;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 6px 10px;
    color: var(--ink);
    cursor: pointer;
  }
}