@media screen and (min-width: 320px) {
    * {
        margin: 0;
        padding: 0;
    }

    body {
        font-family: "Courier New", Courier, monospace;
        font-size: 15px;
        color: whitesmoke;
        background-color: #251b37;
        padding: 40px 20px;
        min-height: 90vh;
    }

    div.main,
    body {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    h1,
    a {
        color: #f0de36;
    }

    div.subscribe {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 5px;
    }
    a.yt {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        margin: 10px 0;
        color: #f0de36;
        font-family: "Gill Sans", "Gill Sans MT", Calibri, "Trebuchet MS",
            sans-serif;
        font-weight: 700;
        font-size: 25px;
        border: 4px solid #f0de36;
        background-color: #251b37;
        padding: 8px 20px;
        box-shadow: inset 0 0 0 0 #f0de36;
        transition: box-shadow 0.5s;
    }

    a.yt:hover {
        box-shadow: inset 250px 0 0 0 #f0de36;
        color: #251b37;
        cursor: pointer;
    }

    footer {
        margin-top: auto;
    }
}
@media screen and (min-width: 768px) {
    div.main {
        font-size: 20px;
    }

    div.subscribe {
        align-items: flex-start;
    }

    iframe {
        width: 600px;
        height: 300px;
    }
}