@media screen and (max-width: 970px){
    .pcm{display: none;}
    main{
        width: 90%;
        margin-right: auto;
        margin-left: auto;
    }
    img{
        width: 100%;
    }
    main h1, main h2, main h3, h4{
        border-bottom: 1px solid rgb(200, 200, 200);
    }
    
    main nav{
        list-style: none;
        display:flex;
        flex-flow: column;
        text-align: center;

    }
    main li a{
        border: 2px solid rgb(200, 200, 200);
        background-color: rgb(230, 230, 230);
        padding: 15px;
        display: block;
        margin-top: 5px;
        border-radius: 10px;
    }
    main a{
        border: 2px solid rgb(200, 200, 200);
        background-color: rgb(230, 230, 230);
        border-radius: 5px;
        padding: 10px; 
    }
    table {
        border-collapse: collapse;
    }
    td, th{
        border: 1px solid rgb(200, 200, 200);
    }
}
@media screen and (min-width: 971px){
    .spm{display: none;}
    main{
        width: 950px;
        margin-right: auto;
        margin-left: auto;  
    }
    img{
        width: 70%;
    }
    main h1, main h2, main h3{
        border-bottom: 1px solid rgb(200, 200, 200);
    }
    main li a{
        margin-right: 20px;
        
    }
    main a{
        border: 2px solid rgb(200, 200, 200);
        background-color: rgb(230, 230, 230);
        border-radius: 5px;
        padding: 10px; 
    }

    main li a{
        padding: 15px;
    }
    table {
        border-collapse: collapse;
    }
    td, th{
        border: 1px solid rgb(200, 200, 200);
    }
}
.timw{
    width: 80px;
    text-align: center;
    background-color: rgb(200, 230, 230);
}