body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f3f4f6;
  margin: 0;
  padding: 0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .logo {
  font-size: 1.2rem;
  font-weight: bold;
  color: #111827;
}

nav a {
  margin: 0 1rem;
  color: #374151;
  text-decoration: none;
  font-weight: 500;
}

.cta-btn {
  background-color: #ea580c;
  color: #fff;
  padding: 0.6rem 1rem;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

.cta-btn.blanco {
  background: white;
  color: #ea580c;
  border: 1px solid #ea580c;
}

h1 {
  text-align: center;
  color: #1f2937;
}

.cursos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.cursos-grid.visible {
  opacity: 1;
  transform: translateY(0);
}

.curso-card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.curso-card:hover {
  transform: scale(1.02);
}

.curso-card h3 {
  margin-top: 0;
  color: #1f2937;
}

.curso-card h5 {
  margin: 0.5rem 0;
  font-weight: bold;
  color: #111827;
}

.curso-card ul {
  padding-left: 1.2rem;
  margin-top: 0.5rem;
}

.curso-card ul li {
  margin-bottom: 0.4rem;
}

.curso-card .precio {
  color: #dc2626;
  font-weight: bold;
  font-size: 1.2rem;
}

.cta-btn {
  background-color: #f97316;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  cursor: pointer;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.cta-btn:hover {
  background-color: #ea580c;
}

.footer {
  background: #111827;
  color: white;
  padding: 3rem 2rem 2rem;
}

.footer-contenido {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer h3,
.footer h4 {
  margin-bottom: 1rem;
  color: white;
}

.footer-col ul {
  list-style: none;
  padding-left: 0;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul li a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-col ul li a:hover {
  color: #ffffff;
}

.footer-col .contacto li {
  color: #d1d5db;
  font-size: 0.95rem;
}

.footer-bottom {
  border-top: 1px solid #374151;
  text-align: center;
  margin-top: 2rem;
  padding-top: 1.5rem;
  color: #9ca3af;
  font-size: 0.9rem;
}

.icono-footer {
  color: #f97316;
  margin-right: 0.5rem;
}

.img-principal {
  width: 100%;
  margin: 2%;
  padding: auto;
  border-radius: 15px;
}