body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #eef1f5;
}

.header {
    text-align: center;
    padding: 40px 20px;
    background: #003366;
    color: white;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    padding: 40px;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0px 4px 12px rgba(0,0,0,0.1);
}

.card img {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    object-fit: cover;
}

.card h2 {
    margin-top: 15px;
    color: #003366;
}

.card p {
    color: #555;
    font-size: 14px;
    margin: 10px 0;
}

.btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background: #0055aa;
    color: white;
    border-radius: 8px;
    text-decoration: none;
}

.btn:hover {
    background: #003f7d;
}
.btn.disabled {
    background: #999;
    cursor: not-allowed;
    opacity: 0.7;
}