main {
    display: flex;
    justify-content: center;
    margin-top: 60px;
    text-align: center;
}

.content {
    max-width: 340px;
}

.content h3 {
    text-align: center;
    margin-bottom: 0;
}

.bg-field {
    background: #e6f6da;
}

.box-black {
    background-color: #313131;
    height: 74px;
    width: 294px;
    border-radius: 8px;
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    -ms-border-radius: 8px;
    -o-border-radius: 8px;
    margin: auto;
    margin-top: 18px;
}