blog/assets/input.css

.input-group {
    position: relative;
    display: table;
    border-collapse: separate;
}
.input-group[class*="col-"] {
    float: none;
    padding-left: 0;
    padding-right: 0;
}
.input-group .form-control {
    position: relative;
    z-index: 2;
    float: left;
    width: 100%;
    margin-bottom: 0;
}
.input-group-addon,
.input-group-btn,
.input-group .form-control {
    display: table-cell;
}
.input-group-addon:not(:first-child):not(:last-child),
.input-group-btn:not(:first-child):not(:last-child),
.input-group .form-control:not(:first-child):not(:last-child) {
    border-radius: 0;
}
.input-group-addon,
.input-group-btn {
    width: 1%;
    white-space: nowrap;
    vertical-align: middle;
}
.input-group-addon {
    padding: 5px 12px;
    font-size: 13px;
    font-weight: normal;
    line-height: 1;
    color: #222;
    text-align: center;
    background-color: #e5e5e5;
    border: 1px solid #ccc;
    /*border-radius: 4px;*/
}
.input-group-addon input[type="radio"],
.input-group-addon input[type="checkbox"] {
    margin-top: 0;
}
.input-group-addon.fix-border {
    border-left: 0;
    border-right: 0;
}
.input-group-addon:empty {
    padding: 0;
    width: 1px;
}
.input-group-addon.fix-padding {
    padding: 0;
    width: 1px;
}
.input-group-btn.fix-border > .btn {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
}

.input-group-addon:first-child {
    border-right: 0;
}
.input-group-addon:last-child {
    border-left: 0;
}
.input-group-addon + .input-group-addon {
    border-left: 1px solid #ccc;
}
.input-group-btn {
    position: relative;
    font-size: 0;
    white-space: nowrap;
}
.input-group-btn > .btn {
    position: relative;
}
.input-group-btn > .btn + .btn {
    margin-left: -1px;
}
.input-group-btn > .btn:hover,
.input-group-btn > .btn:focus,
.input-group-btn > .btn:active {
    z-index: 2;
}
.input-group-btn:first-child > .btn,
.input-group-btn:first-child > .btn-group {
    margin-right: -1px;
}
.input-group-btn:last-child > .btn,
.input-group-btn:last-child > .btn-group {
    margin-left: -1px;
}


.form-control {
    display: block;
    width: 100%;
    height: 40px;
    padding: 5px 8px;
    font-size: 13px;
    line-height: 1.53846154;
    color: #222;
    background-color: #fff;
    border: 1px solid #ccc;
    /*border-radius: 4px;*/
    -webkit-box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%);
    box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%);
    -webkit-transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    -o-transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
}

.input-group .form-control:last-child,
.input-group-addon:last-child,
.input-group-btn:first-child>.btn-group-vertical:not(:first-child)>.btn,
.input-group-btn:first-child>.btn-group:not(:first-child)>.btn,
.input-group-btn:first-child>.btn:not(:first-child),
.input-group-btn:last-child>.btn,
.input-group-btn:last-child>.btn-group-vertical>.btn,
.input-group-btn:last-child>.btn-group>.btn,
.input-group-btn:last-child>.dropdown-toggle {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group .form-control:first-child,
.input-group-addon:first-child,
.input-group-btn:first-child>.btn,
.input-group-btn:first-child>.btn-group-vertical>.btn,
.input-group-btn:first-child>.btn-group>.btn,
.input-group-btn:first-child>.dropdown-toggle,
.input-group-btn:last-child>.btn-group-vertical:not(:last-child)>.btn,
.input-group-btn:last-child>.btn-group:not(:last-child)>.btn,
.input-group-btn:last-child>.btn:not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.form-control {
    display: block;
    width: 100%;
    height: 32px;
    padding: 5px 8px;
    font-size: 13px;
    line-height: 1.53846154;
    color: #222;
    background-color: #fff;
    border: 1px solid #ccc;
    /*border-radius: 4px;*/
    -webkit-box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%);
    box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%);
    -webkit-transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    -o-transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
}

.form-control:focus {
    border-color: #145ccd;
    outline: 0;
    -webkit-box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%), 0 0 8px rgb(20 92 205 / 60%);
    box-shadow: inset 0 1px 1px rgb(0 0 0 / 8%), 0 0 8px rgb(20 92 205 / 60%);
}