.popup_callback{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
    display: none;
}
.popup_callback__overlay {
    width: 100%;
    height: 100%;
    background: #000;
    opacity: .8;
    position: absolute;
    z-index: -1;
}
.popup_callback__content {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.popup_callback__form_block{
    background-color: #ddd;
    padding: 37px 15px 20px 15px;
    border-radius: 5px;
    position: relative;
}
.popup_callback__close{
    position: absolute;
    top: 5px;
    right: 10px;
    font-size: 13px;
    color: #909090;
    cursor: pointer;
}
.popup_callback__close:hover{
    text-decoration: underline;
}
.popup_callback__title{
    display: block;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    color: #444444;
    text-align: center;
    margin-bottom: 10px;
}
.form_callback input{
    width: 260px;
    border: 1px solid #c0c0c0;
    background-color: #ffffe0;
    color: #505050;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 5px;
}
.form_callback button{
    background: none repeat scroll 0 0 #1F9403;
    background-image: linear-gradient(to bottom,#007400,#1F9403,#007400);
    display: block;
    width: 100%;
    height: 37px;
    border: none;
    color: white;
    font-size: 16px;
    border-radius: 5px;
    margin: 0 auto;
    cursor: pointer;
}
.form_callback button:hover{
    background: none repeat scroll 0 0 #156d00;
    background-image: none;
}

.form_callback .thank-block{
    text-align: center;
}
.form_callback .thank-block b{
    color: green;
    font-size: 17px;
}