/* Nav CSS from https://codepen.io/mburnette/pen/zKrDm */


.nav {
    max-width: 100%;
    margin: 0 auto;
}


/* basic menu styles */

.block-menu {
    display: flex;
    justify-content: space-evenly;
    flex-flow: row;
    width: 100%;
    background: #000;
    border-radius: 20px;
    margin-top: 10px;
    padding-left: 0px;
}

.block-menu li {
    list-style-type: none;
    border-radius: 20px;

}

.block-menu li a {
    color: #fff;
    display: block;
    border-radius: 20px;
    text-decoration: none;
    font-family: Times, serif;
    overflow: hidden;
    line-height: 20px;
    font-size: 20px;
    padding: 15px 10px;
}

/* animation domination */
.three-d {
    perspective: 500px;
    transition: all .07s linear;
    position: relative;
    cursor: pointer;
}

/* complete the animation! */
.three-d:hover .three-d-box,
.three-d:focus .three-d-box {
    transform: translateZ(-25px) rotateX(90deg);
}

.three-d-box {
    transition: all .3s ease-out;
    transform: translatez(-25px);
    transform-style: preserve-3d;
    /*    pointer-events: none;*/
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 20px;
}

/* 
	put the "front" and "back" elements into place with CSS transforms, 
	specifically translation and translatez
*/
.front {
    transform: rotatex(0deg) translatez(25px);
    border-radius: 20px;
}

.back {
    transform: rotatex(-90deg) translatez(25px);
    color: #730000;
    border-radius: 20px;
}

.front,
.back {
    display: block;
    border-radius: 20px;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: #000;
    padding: 15px 10px;
    color: #fff;
    /*    pointer-events: none;*/
    box-sizing: border-box;
}

.back {
    background: #930000;
    border-radius: 20px;
}

/* menu for small screen */

@media all and (max-width:740px) {
    .block-menu {
        flex-flow: column;
        border-radius: 20px;
        width: 100%;

    }

    .block-menu li a {
        color: #fff;
        display: block;
        border-radius: 20px;
        text-decoration: none;
        text-align: center;
        font-family: Times, serif;
        overflow: hidden;
        line-height: 16px;
        font-size: 14px;
        padding: 15px 10px
    }


}