MeikanClient/sass/menu.scss

.menu
{
    font-size: 0;

    position: relative;
    z-index: 2;

    height: 65px;
    margin: 0;
    padding: 0;

    background: #fff;
    box-shadow: 0 3px 6px rgba(0,0,0,.23), 0 3px 6px rgba(0,0,0,.16);
    a
    {
        font-size: 22px;
        font-variant: small-caps;
        line-height: 65px;

        display: inline-block;

        height: 100%;
        padding: 0 30px;

        transition: background .1s, color .1s;
        vertical-align: middle;
        text-decoration: none;

        color: rgba(0,0,0,.52);
        &:first-child
        {
            font-size: 30px;
            font-variant: normal;

            padding-left: 0;

            color: #ff4081;
            > i {
                height: inherit;
                line-height: inherit;
                vertical-align: top;
                font-size: 30px;
            }
            > span
            {
                margin-left: 10px;
            }
        }
        &:not(:first-child):hover,
        &:not(:first-child).open
        {
            color: #fff;
            background: #ff4081;
        }
    }
}
.submenu
{
    position: relative;
    z-index: 1;

    overflow: hidden;

    width: 100%;
    height: 0;

    transition: height .5s;

    background: #212121;
    box-shadow: inset 0 3px 6px rgba(0,0,0,.23);

    will-change: height;
    &.open
    {
        height: 350px;
    }
    .container
    {
        height: 350px;
        .group
        {
            position: absolute;
            top: 0;
            left: 0;

            display: flex;

            width: 100%;
            height: 100%;

            pointer-events: none;

            opacity: 0;
            &.open
            {
                opacity: 1;
            }
            .column
            {
                display: flex;
                flex-direction: column;

                margin: 20px 10px;

                color: #fff;

                flex: 1;
                .groupTitle
                {
                    line-height: 20px;

                    max-height: 20px;
                }
                > *
                {
                    display: flex;

                    height: 100%;
                }
                ul
                {
                    display: flex;
                    flex-direction: column;

                    margin: 20px 0 0 10px;
                    padding: 10px 20px;

                    list-style: none;

                    border-left: 2px rgba(255,255,255,.1) solid;
                    li
                    {
                        position: relative;

                        flex: 1;
                        .title
                        {
                            font-size: 16px;

                            display: block;

                            margin-bottom: 3px;

                            color: #ff80ab;
                        }
                        .info
                        {
                            font-size: .8em;
                            font-weight: light;

                            color: #aaa;
                        }
                    }
                }
            }
        }
    }
}