/*Default Tag Overwite*/
body{
    text-align: center;
    font-family :"Yu Mincho", "YuMincho",'游明朝体','游明朝',sans-serif,"Sawarabi Mincho";
    color: #333;
    letter-spacing: 0.1em;
    line-height: 2;
}
a{
    color: #000;
    text-decoration: underline;
}
a:hover{
    text-decoration: none;
}
nav ul li{
    list-style: none;
}
ul{
    padding: 0;
}

/* end-Default Tag Overwite*/


#contents{
    font-size: 12px;
}
#contents nav{
    background-color: #333;
    margin-bottom: 40px;
    -webkit-box-shadow: inset 0 0 10px #000;
    box-shadow: inset 0 0 10px #000;
}
#contents nav ul{
    max-width: 1000px;
    margin: 0 auto;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    -moz-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    -o-flex-wrap: wrap;
    flex-wrap: wrap;
}
#contents nav ul li{
    width: 33.3%;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
}
#contents nav ul li a{
    color: #aaa;
    font-family: 'Pathway Gothic One', sans-serif;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
    width: 90%;
    display: inline-block;
    background-color: rgba(255,255,255,0);
    padding: 1em 0;
    margin: 0 5%;
    position: relative;
    z-index: 2;
}
#contents nav ul li a:hover{
    color: #333;
}

#contents nav ul li a::after{
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #ddd;
    z-index: -1;
    transition: 0.3s;
    transform: scaleY(0);
    transform-origin: center;
    -webkit-box-shadow: inset 0 5px 10px -10px #000;
    box-shadow: inset 0 5px 10px -10px #000;
}

#contents nav ul li a:hover::after{
    transform: scaleY(1);
}
#contents nav ul li a span{
    display: block;
    line-height: 1.2;
    font-size: 0.5em;
}
#contents > section{
    
    padding: 20px 0;
}
#contents > section:nth-of-type(even){
    padding: 40px 0;
    background-color: #333;
    -webkit-box-shadow: inset 0 0 10px #000;
    box-shadow: inset 0 0 10px #000;
    color: #fff;
}
#contents > section:nth-of-type(even) h2{
    color: #eee;
}
@media(max-width:767px){
    
    #contents nav,#contents > section{
        padding-left: 2%;
        padding-right: 2%;
    }
    #contents nav ul li{
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
        border-right: 1px solid #aaa;
    }
    #contents nav ul li:nth-of-type(3n){
        border-right: 0;
    }
    #contents nav ul li a{
        width: 100%;
        margin: 0;
    }
    #contents nav ul li a span{
        transform: scale(0.8);
    }
}