jellyfin-web/dashboard-ui/css/search.css

.headerSearch {
    display: none;
    margin-right: 3em;
}

.txtSearch {
    vertical-align: middle;
    font: 16px arial,sans-serif;
    height: 28px;
    margin: 0 .15em 0 0;
    width: 150px;
}

.searchHints {
    width: 148px;
    color: #000;
    font-family: Arial;
}

.btnSearch {
    vertical-align: middle;
    background-color: #4d90fe;
    background-image: -webkit-gradient(linear,left top,left bottom,from(#4d90fe),to(#4787ed));
    background-image: -webkit-linear-gradient(top,#4d90fe,#4787ed);
    background-image: -moz-linear-gradient(top,#4d90fe,#4787ed);
    background-image: -ms-linear-gradient(top,#4d90fe,#4787ed);
    background-image: -o-linear-gradient(top,#4d90fe,#4787ed);
    background-image: linear-gradient(top,#4d90fe,#4787ed);
    border: 1px solid #3079ed;
    color: #fff!important;
    margin: 0 0;
    -moz-border-radius: 2px;
    -webkit-border-radius: 2px;
    border-radius: 2px;
    font-weight: bold;
    height: 28px;
    min-width: 54px;
    padding: 0 8px;
    text-align: center;
    text-decoration: none !important;
    -moz-user-select: none;
    -webkit-user-select: none;
    text-align: center;
}

    .btnSearch img {
        height: 28px;
        margin: 0 auto;
        border: 0;
    }

.searchHints {
    background-color: #fff;
    border: 1px solid #ccc;
    position: absolute;
    z-index: 999;
}

.searchHintsContent {
    padding: 10px;
}

@media all and (min-width: 650px) {

    .headerSearch {
        display: inline-block;
    }
}

@media all and (min-width: 750px) {

    .txtSearch {
        width: 200px;
    }

    .searchHints {
        width: 198px;
    }
}

@media all and (min-width: 850px) {
    .txtSearch {
        width: 250px;
    }

    .searchHints {
        width: 248px;
    }
}