:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --background-color: #ecf0f1;
    --text-color: #2c3e50;
}

body {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.container {
    display: flex;
    flex-wrap: wrap;
    padding: 20px;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 10px;
    padding: 15px;
    transition: transform 0.3s;
}

.card:hover {
    transform: scale(1.05);
}

.button {
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.button:hover {
    background: var(--secondary-color);
}

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