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

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    height: 100vh;
}

.grid-item {
    border: 1px solid #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
}

#grid-5 {
    background-color: #f0f0f0;
}

.center-content {
    text-align: center;
}

h1, h2 {
    margin: 0;
}

.separator {
    height: 1px;
    background-color: #ccc;
    margin: 10px 0;
}