body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #ffffff;
  color: #333;
}
header.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: white;
  padding: 10px 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.logo {
  height: 50px;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}
nav a {
  text-decoration: none;
  color: #6e2c6b;
  font-weight: bold;
}
.hero-section {
  background-size: cover;
  background-position: center;
  height: 60vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
}
.hero-section .overlay {
  background: rgba(110, 44, 107, 0.7);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
}
.cards {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 40px 20px;
}
.card {
  text-align: center;
  width: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 520px;
}
.card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 12px;
}
.card .text-content {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex-grow: 1;
}
.card h2, .card p {
  margin: 10px 0 0;
}
.about, .certificaciones {
  padding: 40px 20px;
  text-align: center;
}
.certificaciones .logos img {
  height: 60px;
  margin: 0 20px;
}
footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 20px;
}
.footer-img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 20px;
}
@media (max-width: 768px) {
  .cards {
    flex-direction: column;
    align-items: center;
  }
  nav ul {
    flex-direction: column;
    gap: 10px;
  }
}