header {
    padding-bottom: 70px;
}

section {
    padding-bottom: 60px;
}

main {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center;
}

.content-block {
    display: flex;
    flex-direction: column;
    max-width: 650px;
    align-items: center;
    padding-left: 20px;
    padding-right: 20px;
}

.content-block__headline {
    color: #FFF;
    text-align: center;
    font-family: 'OpenSans';
    font-size: 30px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin: 0;
    padding: 0;
    margin-bottom: 5px;
}

.content-block__headline a{
    color: #FFF;
    text-decoration: none;
}    

.additionally__link{
    font-size: 25px;
}

.content-block__text {
    color: #FFF;
    text-align: center;
    font-family: 'OpenSans';
    font-size: 18px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    opacity: 0.7;
}

.content-block__text a{
    color: #FFF;
}

.content-block__text_add{
    margin-bottom: 5px;
}

.content-block__text-btn {
    text-decoration: underline;
}

.con__mail {
    margin-bottom: 5px;
}

@media screen and (max-width: 900px) {
    .content-block__text {
        font-size: 16px;
    }

    .content-block__headline {
        font-size: 24px;
    }
}

@media screen and (max-width: 550px) {
    .content-block__headline {
        font-size: 20px;
    }

    .content-block__text {
        font-size: 14px;
    }
}