.playground button,
.modal-body button:not(.link-like),
.modal button:not(.link-like),
button.regular,
button,
input[type=button],
input[type=submit],
input[type=button].regular,
.playground input[type="button"]:not(.default-button),
.playground input[type="submit"]:not(.default-button),
#searchbuttun,
button.delete,
#header .read_all,
#searchbutton /*, #content button, .modal button (AV: commented for task # 2124) */,
body .mce-window .mce-btn.mce-primary > button[type="button"] {
    padding: 0 1em;
    background: -ms-linear-gradient(top, #f5f5f5, #e5e5e5);
    background: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e5e5e5));
    background: -moz-linear-gradient(top, #f5f5f5, #e5e5e5);
    background: linear-gradient(top, #f5f5f5, #e5e5e5);
    border: solid 1px #999;
    border-radius: 2px;
    font-size: 13px;
    font-weight: 700;
    color: #000;
    margin: 0;
    height: 28px;
    line-height: 100%; /* Evgeny: changed it from 98% */
    font-family: var(--main-font-family);
    vertical-align: middle;
}

    .playground button:not(:disabled):hover,
    .playground button:not(:disabled):focus,
    button.regular:not(:disabled):hover,
    button.regular:not(:disabled):focus,
    button:not(:disabled):hover,
    button:not(:disabled):focus,
    input[type=button].regular:not(:disabled):hover,
    input[type=button].regular:not(:disabled):focus,
    .playground input[type="button"]:not(:disabled):hover,
    .playground input[type="button"]:not(:disabled):focus,
    .playground input[type="submit"]:not(:disabled):hover,
    .playground input[type="submit"]:not(:disabled):focus,
    #searchbuttun:not(:disabled):hover,
    #searchbuttun:not(:disabled):focus,
    #header .read_all:not(:disabled):hover,
    #header .read_all:not(:disabled):focus,
    #searchbutton:not(:disabled):hover,
    #searchbutton:not(:disabled):focus {
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff', endColorstr='#eee');
        background: -ms-linear-gradient(top, #fff, #eee);
        background: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#eee));
        background: -moz-linear-gradient(top, #fff, #eee);
        background: linear-gradient(top, #fff, #eee);
        border: solid 1px #999;
        color: #001292;
    }

    #searchbuttun:not(:disabled):active,
    #header .read_all:not(:disabled):active,
    #searchbutton:not(:disabled):active,
    .playground button:not(:disabled):active,
    button.regular:not(:disabled):active,
    button:not(:disabled):active,
    input[type="button"].regular:not(:disabled):active,
    .playground button:not(:disabled):active {
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#e5e5e5', endColorstr='#f5f5f5');
        background: -ms-linear-gradient(top, #e5e5e5, #f5f5f5);
        background: -webkit-gradient(linear, left top, left bottom, from(#e5e5e5), to(#f5f5f5));
        background: -moz-linear-gradient(top, #e5e5e5, #f5f5f5);
    }