@import url('https://fonts.googleapis.com/css2?family=Caveat&family=Noto+Sans+JP:wght@400;700&display=swap');
html{
    font-size:10px;
}

body{
    padding: 0;
    margin:0;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    font-size:1.6rem;
    letter-spacing: 0.05rem;
    line-height: 1.8;
    color:rgba(0,0,0,0.9)
}
p{
    margin:0;
}

a{
    color: currentColor;
    text-decoration: none;
}

header{
    position: relative;
}

header .kb-logo{
    position:absolute;
    top:0;
    left:30px;
}

header .kb-logo img{
    width: 150px;
}


h1{
    font-weight: 700;
    font-size: 5rem;
    border-bottom: 1px solid #ccc;
    padding-bottom: 0.2em;
    margin-top: 30px;
    display: -ms-grid;
    display: grid;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    height: 80px;
    font-family: 'Caveat', cursive;
}

.howto-index{
    width: 100%;
    display:none;
}
ul.index_button{
    margin:0 20px;
    padding:0;
    display:-webkit-box;
    display:-ms-flexbox;
    display:flex;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    list-style: none;
}
.index_button li{
    background-color: #808080;
    color: #FFF;
    padding: 0.1em 1em;
    border-radius: 100px;
    margin: 0.5em 1rem;
    font-size: 1.3rem;
}


h2.mv-title{
    font-weight: 700;
    font-size:1.8rem;
    text-align: center;
    /* border-bottom: 1px solid #ccc;
    padding-bottom: 0.2em; */
}

.mv-cont-wrap{
    margin-bottom:100px;
}

.mv-grid-cont{
    display: -ms-grid;
    display: grid;
    grid-gap: 25px;
    padding: 30px;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
}

.yt-box{
    /* margin: 0 10px; */
    border: dashed 1px #444;
    border-radius: 10px;
    padding: 5px 20px;
}
.yt-video {
    position: relative;
    width:100%;
    height:0;
    padding-top: 56.25%;
}

.yt-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius:10px;
}

.mv-text{
    font-size:1.4rem;
    padding:0.7em 0.5em;
    text-align: justify;
}

.top_scroll_anchor{
    width: -webkit-max-content;
    width: -moz-max-content;
    width: max-content;
    height: auto;
    background-color: #707070;
    position: fixed;
    right: 1vw;
    bottom: 10px;
    color: #FFF;
    border-radius: 5px;
    padding: 0.5em 0.8em;
    z-index: 999;
    opacity: 0.8;
}


@media screen and (max-width: 959px) {
    .howto-index{
        display:block;
    }
    ul.index_button{
        margin-bottom:30px;
    }
    h1{
        margin-top:0;
        height:auto;
    }

    header .kb-logo{
        position: static;
        text-align: center;
        margin-top: 30px;
    }
    
    header .kb-logo img{
        width: 150px;
    }
}
@media screen and (max-width: 480px) {
	.mv-grid-cont{
        display: -ms-grid;
        display: grid;
        grid-gap: 20px;
        padding: 10px;
        grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    }

}