Ghost/ghost/admin/assets/sass/modules/dropdowns.scss

//
// Dropdown Styles
// --------------------------------------------------

// Wrapper
// Does nothing yet...
.dropdown {}

// List
.dropdown-menu {
    background: #fff;
    box-shadow: rgba(0,0,0,0.5) 0 1px 15px;
    display: inline-block;
    border-radius: 2px;
    padding: 0.5rem 0;
    margin: 0;
    position: relative;
    font-size: 1.4rem;

    // Dropdown Resets - This means we can use any element
    li {
        list-style: none;
    }
} // .dropdown-menu

.dropdown-menu {

    &[class*='triangle-'] {
        &:before {
            content: '';
            position: absolute;
            border-style: solid;
            border-color: #fff transparent;
            display: block;
            width: 0;
        } // :before

        &:after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background: #fff;
            transform: rotate(45deg);
            box-shadow: rgba(0,0,0,0.1) 0 0 5px 5px;
            z-index: -1;
        } // :after
    } // &[class*='triangle-']

    // Bottom
    &[class*='triangle-bottom'] {
        &:before {
            border-width: 10px 10px 0 10px;
            bottom: -10px;
        }
        &:after {
            bottom: -5px;
        }
    }
    &.triangle-bottom {
        &:before {
            left: 50%;
            margin-left: -10px;
        }
        &:after {
            left: 50%;
            margin-left: -10px;
        }
    } // &.triangle-bottom

    // Top
    &[class*='triangle-top'] {
        &:before {
            border-width: 0 10px 10px 10px;
            top: -10px;
        }
        &:after {
            top: -5px;
        }
    }
    &.triangle-top {
        &:before {
            left: 50%;
            margin-left: -10px;
        }
        &:after {
            left: 50%;
            margin-left: -10px;
        }
    } // &.triangle-top

    // Top & Bottom Sides
    &.triangle-top-left,
    &.triangle-bottom-left {
        &:before {
            left: 2rem;
        }
        &:after {
            left: 2rem;
        }
    } // &.triangle-bottom-left
    &.triangle-top-right,
    &.triangle-bottom-right {
        &:before {
            right: 2rem;
        }
        &:after {
            right: 2rem;
        }
    } // &.triangle-bottom-right

} // .dropdown-menu

// List Item
.dropdown-item {
    color: #000;
    display: block;
    width: 100%;
    padding: 0.7rem 3.5rem;

    &:not(.divider):hover,
    &:not(.divider):focus {
        background: #f6f6f6;
    }

    &[class*='icon-'] {
        position: relative;
    }

    &[class*='icon-']:before {
        position: absolute;
        left: 1.5rem;
        font-size: 1.2rem;
        line-height: 1.2;
    }

    &.divider {
        position: relative;
        height: 1.5rem;
        &:before {
            content: '';
            position: absolute;
            top: 0.7rem;
            left: 0;
            width: 100%;
            height: 1px;
            background: #eee;
        } // :before
    } // .divider
} // .dropdown-item