.navbar{
    -webkit-box-shadow: 0px 7px 7px 0px rgba(156, 156, 156, 0.3);
    -moz-box-shadow:    0px 7px 7px 0px rgba(156, 156, 156, 0.3);
    box-shadow:         0px 7px 7px 0px rgba(156, 156, 156, 0.3);
}
.li_header{
    margin-right: 15px;
}
.a_header{
    font-family: "Times New Roman";
    border: none;
    position: relative;
    box-sizing: border-box;
    font-size: 20px;
    transition: all 500ms ease;
}
.a_header:hover{
    color: #ffffff !important;
}
#a_main_header{
    font-family: "Times New Roman";
    font-size: 26px;
    margin-right: 30px;
}
.form_header_main{
    color: #000000 !important;
    font-size: 20px;
    font-family: "Centro Sans pro";
}
.form_header_contacts{
    display: inline-block;
    margin-right: 20px;
}
.button_feedback{
    margin-right: 10px;
}