header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;

    width: 100%;

    background-color: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 15px;
}

nav ul li {
    display: inline;
}

nav ul li a {
    text-decoration: none;
    color: black;
}

nav ul li a:hover {
    text-decoration: underline;
    color: #D3D3D3;
}

@media (max-width: 768px) {
  header {
    justify-content: center;   /* centra en eje horizontal */
    flex-direction: column;    /* apila elementos */
    text-align: center;
    /* gap: 10px; */
  }

  nav ul {
    justify-content: center;
    flex-wrap: wrap;
  }

  header img {
    width: 250px;
    max-width: 100%;
    height: auto;
  }
}