header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px 10px 20px;
    border-bottom: 1px solid #ccc;
    background-color: white;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
}

.spacer {
    flex: 1;
}

.logo {
    margin-left: 250px;
    height: 80px;
    display: block;
    z-index: 2;
    position: relative;
}

.logout-button {
    padding: 10px 20px;
    margin-left: 200px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
    cursor: pointer;
    flex-shrink: 0;
}

main {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: white;
    margin-top: 100px;
    margin-bottom: 100px;
}

footer {
    width: 100%;
    height: 60px;
    background-color: #4B4B4B;
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 1000;
}