body,
html {
    background-color: black;
    margin: 0px;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#start-btn {
    display: block;
    margin: 0 auto;
}

.session {
    margin: 10px;
    padding: 16px;
    border: 1px solid white;
    display: flex;
    flex-direction: column;
    color: white;
    align-items: center;
    gap: 50px;
}

.neuro-ad {
    margin: 10px;
    padding: 16px;
    border: 1px solid white;
    display: flex;
    flex-direction: column;
    color: white;
    align-items: center;
    gap: 50px;
}

#flight-registration, #mails, #smses {
    display: flex;
    flex-direction: row;
}

.searches {
    margin: 10px;
    padding: 16px;
    border: 1px solid white;
    display: flex;
    flex-direction: column;
    color: white;
    align-items: center;
    gap: 50px;
}