/* Более бледный placeholder в полях ввода. По материалам https://stackoverflow.com/questions/20773665/fail-to-change-placeholder-color-with-bootstrap-3
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.form-control::-webkit-input-placeholder { color: gainsboro; }  /* WebKit, Blink, Edge */
.form-control:-moz-placeholder { color: gainsboro; }  /* Mozilla Firefox 4 to 18 */
.form-control::-moz-placeholder { color: gainsboro; }  /* Mozilla Firefox 19+ */
.form-control:-ms-input-placeholder { color: gainsboro; }  /* Internet Explorer 10-11 */
.form-control::-ms-input-placeholder { color: gainsboro; }  /* Microsoft Edge */