body {
    font-family: arial, sans-serif;
    background-Color: cyan;
}

ul {
    background-color: aliceblue;
    padding: 1px;
}

p {
    width: 70%;
    flex: 2 200px;
    padding: 5px;
}

.T, table, th, td, ul {
    background-color: aliceblue;
    padding: 1px;
}

.BT {
    width: 80%;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

img.list {
    width: 30%;
    height: auto;
    flex: 1 200px;
    padding: 5px;
}

h2 {
    width: 100%;
    background-color: aliceblue;
    position: sticky;
    top: 1.55em;
    z-index: 3;
}

table, th, td, ul {
    border: 2px solid blue;
}

h1 {
    background-color: deepskyblue;
    position: sticky;
    top: 0;
    z-index: 10;
}

.popup {
    z-index: 50;
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 80%;
    max-height: 80%;
    width: auto;
    height: 80%;
    padding: 0;
    outline: solid black 5000px;
}

@media screen and (max-width: 480px) {
    body {
        background-color: lightskyblue;
    }

    img.list {
        width: 100%;
        height: auto;
        flex: 1 200px;
        padding: 5px;
    }

    .popup {
        z-index: 50;
        display: none;
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        max-width: 80%;
        max-height: 80%;
        width: 80%;
        height: auto;
        padding: 0;
        outline: solid black 5000px;
    }
}