style.css

/* class-based and id-based Stylings */
.message-two {
    display: none;
}

.timer {
    animation: blink 0.5s infinite;
    font-weight: bold;
}

/* General Stylings */
html,
body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
}

body {
    width: 75vw;
    display: table-cell;
    vertical-align: middle;
    font-family: "MiSans Devanagari";
    font-family: "MiSans Latin";
    background: #000000;
    color: #FFFFFF;
    font-size: 1.5rem;
}

h1 {
    font-size: 5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

h2 {
    font-size: 2rem;
    font-weight: normal;
}

h2 span {
    font-weight: bold;
    margin-right: 1rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: normal;
    color: #AD88F2;
}

section {
    display: flex;
    flex-flow: row;
    flex-wrap: nowrap;
    padding-top: 10px;
}

img {
    background: white;
    padding: 1rem;
    width: 10rem;
    height: 10rem;
}

section section {
    padding-left: 1.25rem;
}

/* @media Queries */
@media (max-width: 768px) {
    /* class-based and id-based Stylings */
    .message-one {
        display: none;
    }

    .message-two {
        display: block;
    }

    /* General Stylings */
    img {
        display: none;
    }

    section section {
        padding-left: 0;
    }
}

/* @keyframes Queries */
@keyframes blink {
    0% {
        opacity: 100%;
    }

    50% {
        opacity: 25%;
    }

    100% {
        opacity: 100%;
    }
}