style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    font-family: 'Poppins', sans-serif;
}

.container {
    position: relative;
    display: flex;
    width: 100%;
    height: 100vh;
    /* height: 100%; */
    background: #ff4e2b;
}

.container .imgBx {
    position: relative;
    height: 100%;
    /* height: 100vh; */
    width: 450px;
    background: url(img/bg2.jpg);
    background-size: cover;
    background-position: center;
}

.container .countdownBx {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    width: calc(100% - 450px);
    /* width: calc(550px - 450px); */
}

.container .countdownBx h2 {
    text-align: center;
    color: white;
    font-size: 50px;
    text-transform: uppercase;
    letter-spacing: 10px;
    font-weight: 500;
}

.container .countdownBx h2 span {
    font-size: 96px;
    font-weight: 700;
}

.container .countdownBx h2 span i {
    font-style: initial;
    font-weight: 700;
    color: yellow;
    /* color: #ff0; */
}

.container .countdownBx .countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    background: rgba(0,0,0,0.1);
    width: 100%;
    height: 120px;
}

.container .countdownBx .countdown div {
    position: relative;
    width: 100px;
    text-align: center;
    color: white;
    font-size: 50px;
    font-weight: 500;
    margin: 0 45px 10px;
}

.container .countdownBx .countdown div::before {
    content: 'text';
    /* position: relative; */
    position: absolute;
    bottom: -35px;
    left: 0;
    width: 100%;
    height: 35px;
    color: white;
    font-size: 13.5px;
    font-weight: 600;
    line-height: 10px;
    letter-spacing: 2.5px;
    text-transform: uppercase;
}

.container .countdownBx .countdown div#day::before {
    content: 'days';
}

.container .countdownBx .countdown div#hour::before {
    content: 'hours';
}

.container .countdownBx .countdown div#minute::before {
    content: 'minute';
}

.container .countdownBx .countdown div#second::before {
    content: 'seconds';
}

.container .countdownBx .countdown div#second {
    color: yellow;
}

@media (max-width: 991px) {
    .container .imgBx {
        position: absolute;
        top: 0;
        width: 100%;
        height: 250px;
        background-image: url(img/bg.jpg);
        background-repeat: repeat;
        background-size: cover;
    }

    .container .countdownBx {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .container .countdownBx h2 {
        /* font-size: 1.1em; */
        font-size: 2em;
        font-weight: bolder;
    }

    .container .countdownBx .countdown {
        height: 100px;
    }

    .container .countdownBx .countdown div {
        width: 80px;
        color: #fff;
        margin: 0;
        margin-top: -25px;
    }
}