
// Base styles
// --------------------------------------------------

.btn {
    display: inline-block;
    margin-bottom: 0; // For input.btn
    font-weight: @btn-font-weight;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
    border: 1px solid transparent;
    white-space: nowrap;
    .button-size(@padding-base-vertical; @padding-base-horizontal; @font-size-base; @line-height-base; @border-radius-base);
    .user-select(none);

    &,
    &:active,
    &.active {
        &:focus {
            .tab-focus();
        }
    }

    &:hover,
    &:focus {
        color: @btn-default-color;
        text-decoration: none;
    }

    &:active,
    &.active {
        outline: 0;
        background-image: none;
    }

    &.disabled,
    &[disabled],
    fieldset[disabled] & {
        cursor: not-allowed;
        pointer-events: none; // Future-proof disabling of clicks
        .opacity(.65);
        .box-shadow(none);
    }
}


// Alternate buttons
// --------------------------------------------------

.btn-default {
    .button-variant(@btn-default-color; @btn-default-bg; @btn-default-border; @btn-primary-bg; @btn-primary-bg);
}
.btn-primary {
    .button-variant(@btn-primary-color; lighten(@btn-primary-bg, 5%); @btn-primary-border; @btn-primary-bg; @btn-primary-bg);
    font-weight: 500;
}
.btn-secondary {
    .button-variant(#000; lighten(@btn-secondary-bg, 5%); @btn-secondary-border; @btn-secondary-bg; @btn-secondary-bg);
    color: @btn-secondary-color;
}
// Success appears as green
.btn-success {
    .button-variant(@btn-success-color; @btn-default-bg; @btn-success-border; @btn-success-bg; @btn-success-bg);
}
// Info appears as blue-green
.btn-info {
    .button-variant(@btn-info-color; @btn-default-bg; @btn-info-border; @btn-info-bg; @btn-info-bg);
}
// Warning appears as orange
.btn-warning {
    .button-variant(@btn-warning-color; @btn-default-bg; @btn-warning-border; @btn-warning-bg; @btn-warning-bg);
}
// Danger and error appear as red
.btn-danger {
    .button-variant(@btn-danger-color; @btn-default-bg; @btn-danger-border; @btn-danger-bg; @btn-danger-bg);
}


// Outline buttons
// --------------------------------------------------

.btn-outline-default {
    .button-outline-variant(@btn-default-bg);
}
.btn-outline-primary {
    .button-outline-variant(@btn-primary-bg);
}
.btn-outline-secondary {
    .button-outline-variant(darken(@btn-secondary-bg, 15%));
}
.btn-outline-info {
    .button-outline-variant(@btn-info-bg);
}
.btn-outline-success {
    .button-outline-variant(@btn-success-bg);
}
.btn-outline-warning {
    .button-outline-variant(@btn-warning-bg);
}
.btn-outline-danger {
    .button-outline-variant(@btn-danger-bg);
}


// Link buttons
// -------------------------

// Make a button look and behave like a link
.btn-link {
    color: @link-color;
    font-weight: normal;
    cursor: pointer;
    border-radius: 0;

    &,
    &:active,
    &[disabled],
    fieldset[disabled] & {
        background-color: transparent;
        .box-shadow(none);
    }
    &,
    &:hover,
    &:focus,
    &:active {
        border-color: transparent;
    }
    &:hover,
    &:focus {
        color: @link-hover-color;
        text-decoration: underline;
        background-color: transparent;
    }
    &[disabled],
    fieldset[disabled] & {
        &:hover,
        &:focus {
            color: @btn-link-disabled-color;
            text-decoration: none;
        }
    }
}


// Button Sizes
// --------------------------------------------------

.btn-lg {
    // line-height: ensure even-numbered height of button next to large input
    .button-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
}
.btn-sm {
    // line-height: ensure proper height of button next to small input
    .button-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
}
.btn-xs {
    .button-size(@padding-xs-vertical; @padding-xs-horizontal; @font-size-small; @line-height-small; @border-radius-small);
}


// Block button
// --------------------------------------------------

.btn-block {
    display: block;
    width: 100%;
    padding-left: 0;
    padding-right: 0;
}

// Vertically space out multiple block buttons
.btn-block + .btn-block {
    margin-top: 5px;
}

// Specificity overrides
input[type="submit"],
input[type="reset"],
input[type="button"] {
    &.btn-block {
        width: 100%;
    }
}
