wagtail/client/scss/components/_dropdown.legacy.scss

.dropdown {
    @include clearfix();
    position: relative;

    input[type=submit],
    input[type=reset],
    input[type=button],
    button,
    .button {
        padding: 0;
        display: block;
        width: 100%;
        height: 3em;
        line-height: 3em;
        text-align: left;
        padding-left: 1em;
        float: left;
    }

    input[type=submit],
    input[type=reset],
    input[type=button],
    button {
        line-height: inherit;
    }

    ul {
        @include unlist();
        background-color: $color-teal;
        position: absolute;
        overflow: hidden;
        top: 100%;
        left: -2000px;
        z-index: 500;
        opacity: 0;

        li {
            float: none;
            border-color: rgba(255, 255, 255, 0.2);
            border-style: solid;
            border-width: 1px 0 0;
            overflow: hidden;
        }

        a {
            box-sizing: border-box;
            white-space: nowrap;
            position: relative;
            text-decoration: none;
            text-transform: uppercase;
            display: block;
            color: $color-white;
            padding: 1em;
            font-weight: normal;

            &:hover {
                background-color: $color-teal-darker;
            }

            &.icon {
                padding-right: 5em;

                // stylelint-disable-next-line max-nesting-depth
                &:before,
                &:after {
                    right: 1em;
                }
            }

            &.shortcut {
                padding-right: 7em;
            }
        }

        a,
        input[type=submit],
        input[type=reset],
        input[type=button],
        .button,
        button {
            border-radius: 0;
            font-size: 0.95em;
            -webkit-font-smoothing: auto;
        }

        label {
            padding: 1.3em;
        }

        .kbd {
            position: absolute;
            right: 1em;
            font-weight: 600;
            font-size: 0.8em;
            color: rgba(0, 0, 0, 0.3);
        }

    }

    &.open ul {
        box-shadow: 0 3px 3px 0 rgba(0, 0, 0, 0.2);
        opacity: 1;
        left: 0;
        display: block;
    }

    &.match-width ul {
        width: 100%;
        min-width: 110px;

        li {
            white-space: nowrap;
        }
    }

    &.dropup ul {
        box-shadow: 0 -3px 3px 0 rgba(0, 0, 0, 0.2);
        top: auto;
        bottom: 100%;

        li {
            border-width: 0 0 1px;
        }
    }

    .dropdown-toggle {
        color: $color-white;
        text-transform: uppercase;
        background-color: $color-teal;
        line-height: 2.8em;
        cursor: pointer;
        height: 100%;
        border-left: 1px solid rgba(255, 255, 255, 0.2);
        position: absolute;
        right: 0;
        padding: 0 0.5em;
        text-align: center;

        &:before,
        &:after {
            margin: 0;
        }

        &:before {
            width: 1em;
            font-size: 1.2rem;
        }

        &:hover {
            background-color: $color-teal-darker;
        }
    }

    &.open .dropdown-toggle {
        background-color: $color-teal-darker;
    }

    // Styles for dropdowns which are also buttons e.g page editor
    &.dropdown-button {
        .dropdown-toggle {
            border-radius: 0 3px 3px 0;
        }

        &.open {
            > input[type=button],
            > input[type=submit],
            > button,
            > .button {
                border-radius: 3px 3px 0 0;
            }

            .dropdown-toggle {
                border-radius: 0 3px 0 0;
            }
        }
    }

    &.dropup.dropdown-button {
        &.open {
            > input[type=button],
            > input[type=submit],
            > button,
            > .button {
                border-radius: 0 0 3px 3px;
            }

            .dropdown-toggle {
                border-radius: 0 0 3px;
            }
        }
    }
}

.dropdown.white {
    ul {
        background-color: $color-white;

        li {
            border-top: 1px solid rgba(0, 0, 0, 0.1);
        }

        a {
            color: $color-grey-2;

            &:hover {
                background-color: $color-grey-3;
            }
        }
    }
}

.dropdown.warning {
    ul {
        background-color: $color-button-warning;
    }

    .dropdown-toggle {
        background-color: $color-button-warning;

        &:hover {
            background-color: $color-button-warning-hover;
        }
    }
}

// Transitions
.dropdown ul {
    @include transition(opacity 0.2s linear);
}