#callback-open {
    background: #000;
    padding: 40px 20px;
    color: #fff;
    position: relative;
}
#callback-open .form_input {position: relative;}
#callback-open .massage-content {margin: auto; text-align: center;}
#callback-open .flex-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;s
}

#callback-open h2 {
    margin:0 !important;
    font-size: 24px;
}

#callback-open .sender-input, #callback-open .sender-btn {
    width: 100%;
    padding: 9px;
    margin: 10px 0;
    font-size: 17px;
    border: none;
    outline: none;
    background: transparent;
    border: 2px solid;
    color: #fff;
}

#callback-open .sender-btn {
    background: #e3000f;
    border: 2px solid #e3000f;
    color: #fff;
}

#callback-open .sender-descr {
	text-align: center;
	margin: 10px 0;
}

#callback-open .sender-done,
#callback-open .sender-err {
    display: none;
    position: absolute;
    padding: 0 20px;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: #000;
    color: #fff;
}

#callback-open .sender-check {
    font-size: 60px;
    margin: -15px 0 -15px 0;
    color: #e3000f;
}

#callback-open .err-val-phone::after {
    content: '';
    position: absolute;
    left: 20px;
    top: -15px;
    border: 10px solid transparent;
    border-bottom: 10px solid #e3000f; 
}


#callback-open .form_input {width: 33.333%; padding: 0 15px;}

#callback-open .callback-open__body {max-width: 1100px; margin: 0 auto;}

#callback-open .err-val-phone {
    background: #e3000f;
    color: #fff;
    display: none;
    position: absolute;
    left: 15px;
    bottom: -50%;
    z-index: 1;
    padding: 5px 10px;
    animation: pulse-c 2s infinite ease-in-out;
}

::-webkit-input-placeholder {color:#cfcfcf;}
::-moz-placeholder          {color:#cfcfcf;}/* Firefox 19+ */
:-moz-placeholder           {color:#cfcfcf;}/* Firefox 18- */
:-ms-input-placeholder      {color:#cfcfcf;}

@keyframes pulse-c {
from, 
to {bottom: -30px}
10% {bottom: -25px}
20% {bottom: -30px}
30% {bottom: -25px}
40% {bottom: -30px}
100% {bottom: -30px;}
}

@media (max-width: 666px) {
    #callback-open .form_input {width: 100%;}
    #callback-open .form_input:first-child,
    #callback-open .form_input:nth-child(2) {width: 50%;}
}

@media (max-width: 404px) {
    #callback-open .form_input {width: 100% !important;}

}