/* ===== RESET BÁSICO ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #222;
  background-color: #f9fbfd;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* ===== HEADER ===== */
header {
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0057b8;
}

.main-nav ul {
  display: flex;
  gap: 1.5rem;
}

.main-nav a {
  font-weight: 500;
  transition: color 0.3s ease;
}

.main-nav a:hover {
  color: #0057b8;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: #222;
  transition: all 0.3s ease;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(to right, #eef2f6, #dce7f1);
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  color: #003366;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: #444;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-primary {
  background-color: #0057b8;
  color: #fff;
}

.btn-primary:hover {
  background-color: #003d82;
}

.btn-secondary {
  background-color: #e0e0e0;
  color: #0057b8;
}

.btn-secondary:hover {
  background-color: #0057b8;
  color: #fff;
}




/* ===== CURSOS DESTACADOS ===== */
.cursos-destacados {
  padding: 3rem 0;
  background-color: #ffffff;
}

.cursos-destacados h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.8rem;
  color: #003366;
}

.cursos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.curso-card {
  background-color: #f4f7fb;
  border: 1px solid #d0d9e4;
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.curso-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.curso-card h3 {
  margin-bottom: 0.75rem;
  color: #0057b8;
}

.curso-card p {
  margin-bottom: 1.5rem;
  color: #555;
}

/* ===== NEWSLETTER ===== */
.newsletter {
  background-color: #eef2f6;
  padding: 3rem 0;
  text-align: center;
}

.newsletter h2 {
  margin-bottom: 1rem;
  color: #003366;
}

.newsletter form {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.newsletter input[type="email"] {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  flex: 1 1 250px;
}

.newsletter button {
  padding: 0.75rem 1.5rem;
  background-color: #0057b8;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
}

.newsletter button:hover {
  background-color: #003d82;
}

/* ===== FOOTER ===== */
footer {
  background-color: #003366;
  color: #dce7f1;
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

.footer-nav {
  margin-top: 0.5rem;
}

.footer-nav a {
  margin: 0 0.5rem;
  color: #a8c6e6;
}

.footer-nav a:hover {
  text-decoration: underline;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .main-nav {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #ffffff;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-top: 1px solid #e0e0e0;
  }

  .main-nav ul {
    flex-direction: column;
    padding: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav.active {
    max-height: 300px;
  }
}

/* ===== CURSO HEADER ===== */
.curso-header {
  background-color: #eef2f6;
  padding: 3rem 0 2rem;
}

.curso-header h1 {
  font-size: 2rem;
  color: #003366;
  margin-bottom: 0.5rem;
}

.curso-header p {
  color: #444;
  margin-bottom: 0.5rem;
}

/* ===== TEMARIO ===== */
.temario {
  padding: 3rem 0;
  background-color: #ffffff;
}

.temario h2 {
  margin-bottom: 2rem;
  color: #003366;
}

.capitulo {
  border: 1px solid #d0d9e4;
  border-radius: 6px;
  margin-bottom: 1rem;
  background-color: #f9fbfd;
}

.capitulo summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  color: #0057b8;
  outline: none;
}

.capitulo .contenido-capitulo {
  padding: 0 1.25rem 1.25rem;
}

.capitulo .contenido-capitulo p {
  margin-bottom: 1rem;
  color: #333;
}




/* ===== CAPÍTULO CONTENIDO ===== */
.capitulo-contenido {
  padding: 3rem 0;
  background-color: #ffffff;
}

.navegacion-capitulo {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.capitulo-titulo-mini {
  font-weight: 600;
  color: #0057b8;
}

.btn-minor {
  padding: 0.4rem 0.8rem;
  border: 1px solid #0057b8;
  color: #0057b8;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-minor:hover {
  background-color: #0057b8;
  color: #fff;
}

.contenido h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: #003366;
}

.contenido figure {
  margin: 1.5rem 0;
  text-align: center;
}

.contenido figcaption {
  font-size: 0.85rem;
  color: #666;
  margin-top: 0.5rem;
}

.callout {
  background-color: #eef2f6;
  border-left: 4px solid #0057b8;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.callout code {
  background-color: #dce7f1;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'Fira Code', monospace;
}



/* ---------- NAVEGACIÓN FINAL ---------- */
.navegacion-final {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
}

.navegacion-final .btn-minor.disabled {
  opacity: 0.4;
  pointer-events: none;
}