html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
}

body {
    display: -webkit-box;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    -webkit-box-align: center;
    align-items: center;
    align-content: center;
}

h1 {
    color: #440ff1;
    font-size: 4rem;
    text-transform: uppercase;
    display: block;
    width: 100%;
    text-align: center;
}

@media screen and (max-width: 600px) {
    h1 {
        font-size: 3rem;
    }
}

p {
    color: #ffffff;
    font-size: 1.2rem;
    width: 100%;
    padding: 20px;
    text-align: center;
}

.btn {
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: transparent;
    border: 2px solid #e74c3c;
    border-radius: 0.6em;
    color: #e74c3c;
    cursor: pointer;
    display: -webkit-box;
    display: flex;
    align-self: center;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1;
    margin: 20px;
    padding: 1.2em 2.8em;
    text-decoration: none;
    text-align: center;
    text-transform: uppercase;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
}

.btn:hover,
.btn:focus {
    color: #fff;
    outline: 0;
}

.first {
    -webkit-transition: box-shadow 300ms ease-in-out, color 300ms ease-in-out;
    transition: box-shadow 300ms ease-in-out, color 300ms ease-in-out;
}

.first:hover {
    box-shadow: 0 0 40px 40px #e74c3c inset;
}

.fourth {
    border-color: #440ff1;
    color: #fff;
    background-image: linear-gradient(45deg, #440ff1 50%, transparent 50%);
    background-position: 100%;
    background-size: 400%;
    -webkit-transition: background 300ms ease-in-out;
    transition: background 300ms ease-in-out;
}

.fourth:hover {
    background-position: 0;
}