h1{color:#f8f9fa}div.text-box{border:solid 3px #17a2b8;border-radius:10px;padding:10px;background:#404555}.portfolio-block:before{transition:all .3s ease-in-out;background:#555;opacity:0;top:5px;right:5px;bottom:5px;left:5px;position:absolute;content:''}.portfolio-block .caption{position:absolute;width:90%;opacity:0;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%);z-index:9;transition:all .2s ease-in-out;text-align:center}.portfolio-block .caption h4{font-size:1.6rem}.youtube{width:100%;aspect-ratio:16/9;text-align:center}.youtube iframe{width:100%;height:100%}@media(max-width:480px){h1,h2,h3,h4,h5,h6{font-size:1.5rem}.title h2{font-size:2rem}}