:root {
  --azul-pálido: #e6f7ff;
  --azul-oscuro: #003366;
  --blanco: #ffffff;
}

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  margin: 0;
  background-color: var(--blanco);
  color: var(--azul-oscuro);
  line-height: 1.6;
}

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

header {
  background-color: var(--azul-oscuro);
  color: var(--blanco);
  padding: 15px 0;
}

.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: var(--blanco);
  text-decoration: none;
  margin: 0 10px;
  font-weight: bold;
}

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

.hero {
  background: linear-gradient(rgba(0, 51, 102, 0.6), rgba(0, 51, 102, 0.6)),
              url('https://images.unsplash.com/photo-1588776814546-9b9e7708fbae?fit=crop&w=1600&q=80') no-repeat center/cover;
  color: var(--blanco);
  text-align: center;
  padding: 80px 20px;
}

.btn-primary {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--azul-pálido);
  color: var(--azul-oscuro);
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  transition: 0.3s;
}

.btn-primary:hover {
  background-color: var(--blanco);
}

.section {
  padding: 50px 20px;
}

.white-bg {
  background-color: var(--blanco);
}

.blue-bg {
  background-color: var(--azul-pálido);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--blanco);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

blockquote {
  border-left: 4px solid var(--azul-oscuro);
  margin: 20px 0;
  padding-left: 15px;
  font-style: italic;
}

.social-links a {
  margin: 0 10px;
  color: var(--azul-oscuro);
  font-weight: bold;
  text-decoration: none;
}

.social-links a:hover {
  text-decoration: underline;
}

.contact-section {
  background-color: var(--azul-pálido);
  text-align: center;
}

footer {
  background-color: var(--azul-oscuro);
  color: var(--blanco);
  text-align: center;
  padding: 15px 0;
  font-size: 0.9em;
}