.form-control {
    height: calc(2.19rem + 2px);
    width: 100%;
    padding: .375rem .75rem;
    font-size: .9rem;
    line-height: 1.6;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: .25rem;
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
button, input {
    overflow: visible;
}
button, input, optgroup, select, textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}
button, input, optgroup, select, textarea {
    padding: 0;
    line-height: inherit;
    color: inherit;
}
button, input {
    overflow: visible;
}
button, input, optgroup, select, textarea {
    font-family: inherit;
    font-size: 100%;
    line-height: 1.15;
    margin: 0;
}
*, :after, :before {
    box-sizing: border-box;
}
*, ::before, ::after {
    box-sizing: border-box;
    border-width: 0;
    border-style: solid;
    border-color: #e2e8f0;
}
user agent stylesheet
input[type="text" i] {
    padding: 1px 2px;
}