Ghost/core/client/assets/sass/patterns/buttons.scss

//
// Buttons
// --------------------------------------------------


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

%button {
    display: inline-block;
    margin-bottom: 0; // For input.btn
    padding: 9px 14px;
    font-size: 1.1rem;
    line-height: 1.428571429;
    font-weight: 300;
    text-align: center;
    text-transform: uppercase;
    text-shadow: none;
    letter-spacing: 1px;
    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;
    border-radius: $rounded;
    @include user-select(none);

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

    &:hover,
    &:focus {
        color: $blue;
        text-decoration: none;
    }

    &:active,
    &.active {
        outline: 0;
        background-image: none;
        box-shadow: inset 0 2px 2px rgba(0,0,0,.125);
    }

    &.disabled,
    &[disabled],
    fieldset[disabled] & {
        cursor: not-allowed;
        pointer-events: none; // Future-proof disabling of clicks
        opacity: 0.65;
        box-shadow: none;
    }
}
.btn {
    @extend %button;
}


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

@mixin button-style($color, $background, $border) {
    color: $color;
    background-color: $background;
    border-color: $border;
    transition: background 0.2s ease, border-color 0.2s ease;

    &:hover,
    &:focus,
    &:active,
    &.active,
    .open > &.dropdown-toggle {
        color: $color;
        background-color: darken($background, 10%);
        border-color: darken($border, 12%);
    }
    &:active,
    &.active,
    .open > &.dropdown-toggle {
        background-image: none;
    }
    &.disabled,
    &[disabled],
    fieldset[disabled] & {
        &,
        &:hover,
        &:focus,
        &:active,
        &.active {
            background-color: $background;
            border-color: $border;
        }
    }

    .badge {
        color: $background;
        background-color: $color;
        box-shadow: 0 0 0 1px $color;
    }
}

.btn-default {
    font-weight: normal;
    @include button-style(#666, #fff, lighten($midgrey, 40%));
}
.btn-alt {
    @include button-style(#fff, #A1ADB3, darken(#A1ADB3, 5%));
}
.btn-blue {
    @include button-style(#fff, $blue, darken($blue, 5%));
}
// Success appears as green
.btn-green {
    @include button-style(#fff, $green, darken($green, 5%));
}
// Danger and error appear as red
.btn-red {
    @include button-style(#fff, $red, darken($red, 5%));
}


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

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

    &,
    &:active,
    &[disabled],
    fieldset[disabled] & {
        background-color: transparent;
        box-shadow: none;
    }
    &,
    &:hover,
    &:focus,
    &:active {
        color: $blue;
        border-color: transparent;
    }
    &:hover,
    &:focus {
        text-decoration: underline;
        background-color: transparent;
    }
    &[disabled],
    fieldset[disabled] & {
        &:hover,
        &:focus {
            color: $midgrey;
            text-decoration: none;
        }
    }
}


// Minor buttons
// -------------------------

// Add this class to buttons with a small/insignificant action
// for example a "cancel" button. Style is de-emphasised.
.btn-minor {
    text-transform: none;
    letter-spacing: 0;
    font-size: 1.2rem;
    padding: 8px 14px;
}

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

.btn-lg {
    padding: 12px 18px;
    font-size: 1.4rem;
    line-height: 1.33;
    border-radius: 4px;
}

.btn-sm {
    padding: 7px 10px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 2px;
}


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

.btn-block {
    display: block;
    width: 100%;
}

// 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%;
    }
}