.input-group-addon {
    padding: .375rem .75rem;
    margin-bottom: 0;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    text-align: center;
    background-color: #e9ecef;
    border: 1px solid #ced4da;
    border-radius: .25rem;
}
.input-group-addon, .input-group-btn {
    white-space: nowrap;
}
.input-group-addon:not(:last-child) {
    border-right: 0;
}
.input-group .form-control:not(:last-child), .input-group-addon:not(:last-child), .input-group-btn:not(:first-child)>.btn-group:not(:last-child)>.btn, .input-group-btn:not(:first-child)>.btn:not(:last-child):not(.dropdown-toggle), .input-group-btn:not(:last-child)>.btn, .input-group-btn:not(:last-child)>.btn-group>.btn, .input-group-btn:not(:last-child)>.dropdown-toggle {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}
.input-group-addon, .input-group-btn {
    white-space: nowrap;
}