body {
    background-color: antiquewhite;
}

h1 {
    background-color: #34A99D;
    padding: 5px;
    width: 42px;
    margin-left: 30px;
    text-shadow: 2px 2px 3px rgba(225, 216, 216, 0.825);
}

h2 {
    color: cyan;
    background-color: #395B64;
    width: 470px;
    padding: 5px;
    margin-top: 5px;
    margin-left: 30px;
    margin-right: 30px;
}

h3 {
    background-color: lightgray;
    padding: 5px;
    width: 470px;
    margin-left: 30px;
    margin-right: 30px;
    margin-bottom: 5px;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

h4 {
    padding: 5px;
    width: 470px;
    margin-left: 30px;
    margin-right: 30px;
    margin-top: 5px;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

p {
    width: 375px;
    background-color: #A5C9CA;
    border: 5px solid;
    padding: 5px;
    padding-right: 90px;
    margin-left: 30px;
    margin-right: 30px;
}

video {
    margin-left: 30px;
    width: 720px;
}

img {
    margin-left: 30px;
    width: 720px;
}

li {
    list-style-type: circle;
}

a {
    color: black;
}

a:active {
    color: white;
}

.logo {
    max-width: 300px;
}

footer {
    color: black;
    background-color: #34A99D;
    margin-left: 30px;
    width: 110px;
    padding: 5px;
    -webkit-text-stroke: 1px black;
}

@media (max-width: 480px) {
    * {
        box-sizing: border-box;
    }
    body {
        background-image: linear-gradient(azure, gray);
    }
    h1, h2 ,h3, h4, p, li, footer {
        max-width: 340px;
        width: 90%;
        padding: 5px;
        margin-left: auto;
        margin-right: auto;
    }
    h4 {
        margin-top: 1px;
        margin-bottom: 10px;
    }
    video, img {
        width: 90%;
        max-width: 340px;
        display: block;
        margin: 0 auto;
    }
    .logo {
        width: 90%;
        max-width: 256px;
        display: block;
        margin: 0 auto;
    }
}

@media (min-width: 481px) and (max-width: 1280px) {
    * {
        box-sizing: border-box;
    }
    body {        
        background-image: linear-gradient(ivory, gray);
    }
    h1, h2 ,h3, h4, p, li, footer {
        max-width: 600px;
        width: 90%;
        padding: 5px;
        margin-left: auto;
        margin-right: auto;
    }
    h4 {
        margin-top: 1px;
        margin-bottom: 10px;
    }
    video, img {
        width: 90%;
        max-width: 600px;
        display: block;
        margin: 0 auto;
    }
    .logo {
        width: 90%;
        max-width: 256px;
        display: block;
        margin: 0 auto;
    }
}