main {
    margin: 0 80px;
}
main .chapter {
    font-size: 25px;
    font-weight: bold;
    margin-top: 90px;
}
main .container {
    display: flex;
}
.container .player {
    margin: 39px 70px 200px 83px;
}
.container .player iframe{
    border-radius: 5px;
    width: 819;
    height: 464;
}
.container .player button{
    float:right;
    width: 150px;
    height: 30px;
    border-radius: 10px;
    background: #E60E0E;
    border: #E60E0E;
    color: #FFFFFF;
    font-size: 18px;
    margin-right: 20px;
    margin-top: 15px;
}
.container .player img {
    width: 30px;
    margin-left: 15px;
    margin-top: 15px;
}
main .comments {
    margin: 39px 0px 62px 0;
    display: flex;
    flex-direction: column;
}
main .comments form label{
    font-weight: bold;
    font-size: 20px;
}
main .comments form textarea {
    max-width: 227px;
    min-width: 227px;
    max-height: 180px;
    max-height: 120px;
    min-height: 120px;
    font-family: 'PT Serif';
    font-size: 16px;
    margin-top: 27px;
}
.comments form input {
    float: right;
    margin: 10px 0 20px 0;
    width: 70px;
    padding: 2px;
}
.comments .divCom p {
    margin-bottom: 20px;
}
.comments .divCom {
    overflow: scroll;
    max-height: 500px;
}


/* -------------------------- */

@media screen and (max-width:420px){
    main {
        margin: 0 30px;
    }
    main .chapter {
        font-size: 20px;
        margin-top: 21px;
    }
    main .container {
        flex-direction: column;
        align-items: center;
    }
    .container .player {
        margin: 18px 57px 20px 37px;
    } 
    .container .player iframe{
        border-radius: 5px;
        width: 300px;
        height: 170px;
    }
    .container .player button{
        float:right;
        width: 100px;
        height: 20px;
        border-radius: 10px;
        background: #E60E0E;
        border: #E60E0E;
        color: #FFFFFF;
        font-size: 14px;
        margin-right: 10px;
        margin-top: 5px;
    }
    .container .player img {
        width: 15px;
        margin-left: 10px;
        margin-top: 5px;
    }
    main .comments {
        margin: 18px 57px 20px 27px;
    }
    main .comments form label{
        font-weight: bold;
        font-size: 17px;
    }
    main .comments form textarea {
        max-width: 286px;
        min-width: 286px;
        max-height: 59px;
        min-height: 59px;
        font-family: 'PT Serif';
        font-size: 14px;
        margin-top: 17px;
    }
    .comments form input {
        float: right;
        margin: 5px 0 10px 0;
        width: 50px;
        padding: 1px;
        font-size: 12px;
        /* border-radius: 5px;
        border: #000; */
    }
    .comments .divCom p {
        margin-bottom: 20px;
        font-size: 14px;
    }
    .comments .divCom {
        overflow: scroll;
        max-height: 300px;
    }
}