_element_buttons.scss

//
// Button
//
.btn-sm {
    height: floor(2px + ($padding-small-vertical * 2) + ($font-size-small * $line-height-small));
}

//
// Button Group
//
.btn-group {
    font-size: 0;

    .collapse + .btn.collapsed:last-child {
        border-radius: $border-radius-base;
    }

    .btn-default.disabled {
        color: #999;
    }
}

//
// Button Checkbox and Radio
//
.btn-radio,
.btn-checkbox {
    input[type="radio"],
    input[type="checkbox"] {
        position: absolute;
        clip: rect(0, 0, 0, 0);
        pointer-events: none;
    }

    .fa:before {
        content: "\f096";
    }

    input[type=radio]:checked,
    input[type=checkbox]:checked {
        + .fa:before {
            content: "\f00c";
        }
    }
}

label.btn-checkbox {
    margin-bottom: 0;
}

.btn-clear {
    &:focus {
        outline: 1px dotted #000;
    }

    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    outline: inherit;
}