* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background-color: #fafafa;
  color: #222;
  line-height: 1.6;
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 40px;
}

/* Encabezado */
header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  font-size: 3rem;
  color: #2a2a2a;
  margin-bottom: 10px;
}

h2 {
  font-size: 1.5rem;
  color: #555;
}

/* Navegación */
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 30px;
}

nav ul li a {
  font-size: 1.2rem;
  color: #3a75b8;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
  transition: border-color 0.3s;
}

nav ul li a:hover {
  border-color: #3a75b8;
}

/* Contenido */
main {
  margin-top: 30px;
}

h1, h2 {
  font-weight: 600;
}

/* Listas */
ul, ol {
  max-width: 700px;
  margin: 20px auto;
  padding-left: 20px;
  font-size: 1.1rem;
  color: #333;
}

/* Botones */
.btn {
  display: inline-block;
  background-color: #3a75b8;
  color: white;
  padding: 12px 25px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  margin-top: 25px;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #26538a;
}

/* Footer si querés */
footer {
  text-align: center;
  margin-top: 60px;
  color: #777;
  font-size: 0.9rem;
}

/* Media queries para tablets */
@media (max-width: 900px) {
  body {
    max-width: 90%;
    margin: 20px auto;
    padding: 0 20px;
  }

  nav ul {
    flex-direction: column;
    gap: 15px;
    align-items: center;
  }
}