@charset "utf-8";
/* CSS Document */

#wrapper{
    width: 80%;
}

#main{
    text-align: center;
    margin: 0 auto;
    padding: 5px;
}


h2{
    border-bottom: 1px solid #000;
}

.youtube h3{
    font-size: 20px;
    text-align: left;
    font-weight: bold;
    margin-top: 8px;
}

.youtube {
  width: 75%;
  aspect-ratio: 16 / 9;
}

.youtube p {
    font-size: 16px;
    font-weight: bold;
    line-height: 22px;
}

.youtube iframe {
  width: 100%;
  height: 100%;
}

.youtube .explain{
    text-align: left;
    font-weight: normal;
    font-size: 15px;
}

.youtube .fw{
    font-size: 17px; 
    color: #004CFF;
}

.specification{
    font-size: 16px;
    margin-top: 18px;
}

hr{
    margin: 2.6em auto;
}


@media screen and (max-width:649px){
    
#wrapper{
    width: 90%;
}
    
.youtube {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.youtube iframe {
  width: 100%;
  height: 100%;
}

.explain{
    text-align: left;
    font-weight: normal;
    font-size: 14px;
}
    
}