body {
  margin: 0;
  font-family: Arial, sans-serif;
}

header, footer {
  background: #0a3d62;
  color: white;
  padding: 15px;
  text-align: center;
}

nav {
  background: #1e3799;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  color: white;
  padding: 10px 15px;
  text-decoration: none;
}

.container {
  display: flex;
  gap: 15px;
  padding: 15px;
}

.box {
  flex: 1;
  background: #f1f1f1;
  padding: 20px;
  text-align: center;
}
.container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

/* 📱 Mobile */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }
}

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