*{
    box-sizing:border-box;
    background-color: rgb(200, 200, 255);
  }

.header_all{
margin-left: 20px;
}


.header_body{
    width:100%;
    margin: 10px 10px 100px 0px;
    line-height : 120%;
    color: rgb(0, 0, 255);
    font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
    font-weight: 100;
    font-size: 26px;   
    letter-spacing:0.2px;
    overflow: hidden;
}

h1{
    color: rgb(0, 0, 255);
    font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
    font-weight: 100;
    font-size: 26px;   
    letter-spacing:0.2px;
    line-height : 120%;
}


.mgr{
    margin-right:15px;
}


li{
    float:left;
    margin-right: 30px;
}

li:hover{
    color: rgb(255, 255, 255);
}

.contents{
    display:flex;
    flex-wrap:wrap;
    padding:8px;
}   

.contents .thumb{
    width:50%;
    padding:10px;
}


.title{
    color: rgb(0, 0, 255);
    font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
    font-weight:100;
    font-size: 18px;
    margin-bottom: 2px;
}


.work{
    color: rgb(0, 0, 255);
    display: inline;
    font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
    font-weight:100;
    font-size: 18px; 
}


img{
    width: 100%;
    margin:10px 0 30px 0;
    filter:grayscale(0.0);
    mix-blend-mode: multiply;
    

}

img:hover{
    filter:grayscale(0.0);
    mix-blend-mode: normal;
}


video{
    width: 100%;
    margin:10px 0 30px 0;
    mix-blend-mode: multiply;
    filter:grayscale(0.0);
}

video:hover{
    filter:grayscale(0.0);
    mix-blend-mode: normal;
}

footer{
    margin-left: 20px;

}


@media (max-width: 670px) {

    .header_all{
        margin-left: 10px;
        }



    h1{
        color: rgb(0, 0, 255);
        font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
        font-weight: 100;
        font-size: 22px;   
        letter-spacing:0.2px;
        line-height : 120%;
    }

    .header_body{
        width:100%;
        margin: 10px 10px 100px 0px;
        line-height : 120%;
        color: rgb(0, 0, 255);
        font-family:"Gothic Medium BBB","Hiragino Kaku Gothic Pro","ヒラギノ角ゴ Pro W3","メイリオ","ＭＳ Ｐゴシック";
        font-weight: 100;
        font-size: 22px;   
        letter-spacing:0.2px;
        overflow: hidden;
    }


    .contents{
        display:flex;
        flex-wrap:wrap;
        padding: 1px;
    }    

    .contents .thumb{
        width:100%;
        margin:0 auto;
    }

    .header_body{
        margin-top:30px;
    }
  }