style.css

body {
    display: block;
    font: "Raleway", sans-serif;
    color: rgb(0, 0, 0);
    text-align: center;
    letter-spacing: .5em;
    top: 15%;
    background: linear-gradient(to right, red, yellow) no-repeat center center fixed;
    height: 95vh;  
}

input {
    border-radius: 10px;
    height: 50px;
    box-shadow: 6px 6px 1px black;
    background-color: rgba(0, 0, 0, .0);
    cursor: pointer;
}

input:hover {
    box-shadow: 3px 3px 3px black;
    background-color: rgba(255, 255, 255, 0.3);
}

h1 {
    font: 600 3em "Raleway", sans-serif;
    text-align: center;
    text-transform: uppercase;
    width: 100%;
    text-shadow: 6px 6px 10px black,
                 0px 0px 1px white;
}

h2 {
    font-size: 3vh;
    text-shadow: 6px 6px 5px black,
                 0px 0px 1px white;
    text-transform: uppercase;
}

h3 {
    font-size: 2.5vw;
    text-align: center;
    letter-spacing: 0.01em;
    text-shadow: 6px 6px 5px black,
                 0px 0px 1px white;
}

h4 {
    font-size: 20px;
    letter-spacing: 0.01em;
    text-shadow: 6px 6px 5px black,
                 0px 0px 1px white;
}

.btn {
    background-color: rgba(0, 0, 0, .0);
    border-radius: 25px;
    height: 36px;
    font-weight: bold;
    font-size: 20px;
    margin: 10px;
    box-shadow: 6px 6px 1px black,
                0px 0px 1px white;
    text-shadow: 0px 0px 1px white;
    cursor: pointer;
}

.btn:hover {
    box-shadow: 3px 3px 3px black,
                0px 0px 1px white;
    background-color: rgba(255, 255, 255, .3);
}


.box {
    height: 20vh;
    margin: auto;
    width: 40vw;
    border: 5px solid black;
}