body {
    width: 100vw;
    height: 100vh;
}

.button_group {
    width: 200px;
    height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 16px;
}

.button_group > a {
    width: 100%;
}

.container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}