/* Estilos para EDU - Semana 1 */
:root {
  --bg: #0b0f14;
  --bg-elev: #121821;
  --text: #e5e7eb;
  --muted: #cbd5e1;
  --accent: #4dabf7; /* azul celeste */
  --accent-2: #38d9a9; /* verde suave */
  --border: #1f2937;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: "Raleway", system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial;
  line-height: 1.6;
}

.edu-wrapper {
  padding-top: 90px; /* separa del navbar fijo */
}

.container {
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

.edu-hero h1 {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .3px;
  margin-bottom: 10px;
}

.edu-intro {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
}

.btn-back {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 10px;
  background: #0e1622;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-back:hover { text-decoration: none; filter: brightness(1.1); }

.edu-section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  margin: 18px auto 26px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.edu-section h2 {
  color: var(--accent);
  margin-top: 0;
}

.edu-section h3 {
  color: var(--accent-2);
  font-size: 1.05rem;
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

pre {
  background: #0b1220;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 12px;
  border: 1px solid #0f172a;
  overflow-x: auto;
}

code {
  background: #0b1220;
  color: #e2e8f0;
  padding: 0 6px;
  border-radius: 6px;
  border: 1px solid #0f172a;
}

.text-center { text-align: center; }

@media (max-width: 960px) {
  .edu-grid { grid-template-columns: 1fr; }
}