.btn-group {
    position: relative;
    display: inline-block;
    vertical-align: middle;
}

.btn-group>.btn {
    position: relative;
    float: left;
}

.btn-primary {
    color: #000;
    background-color: #ffffff;
}

.btn-group>.btn:first-child:not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.btn-group>.btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
    border-radius: 0;
}

.btn {
    display: inline-block;
    margin-bottom: 0;
    border: 1px solid #bbb;
    border-radius: 4px;
    margin-left: -2px;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active, .btn-primary.active {
    background-color: #C0C0C0;
    border-color: #bbb;
}

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