body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f9f9f9;
    color: #333;
}
header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
}
nav {
    background: #2980b9;
    text-align: center;
    padding: 10px 0;
}
nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 20px;
    max-width: 1000px;
    margin: auto;
}
.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.card {
    flex: 1 1 200px;
    padding: 20px;
    color: white;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.card:hover {
    transform: scale(1.02);
}
.pink { background: #e91e63; }
.blue { background: #2196f3; }
.yellow { background: #ffeb3b; color: #333; }
.green { background: #4caf50; }
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}