body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    font-family: 'Arial', sans-serif;
    margin: 0;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    grid-gap: 15px;
    padding: 15px;
    width: 90%;
    max-width: 1200px;
}

.grid-item {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    font-size: 1.2em;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.grid-item:hover, .grid-item:active {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    transform: translateY(-5px);
}