header {
    background-color: rgba(0, 20, 0, 0.85);
    border-bottom: 2px solid #2fff00;
    padding: 12px 24px;
    margin: 0;
}

.page-content {
    display: flex;
    flex: 1;
}

main {
    flex: 1;
    padding: 20px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

footer {
    background-color: rgba(0, 20, 0, 0.85);
    border-top: 2px solid #2fff00;
    padding: 12px 24px;
    text-align: center;
    color: white;
}