styleJ4.css

html {
    max-width: 1920px !important;
    margin: 0 auto !important;
}

body.bodyArea {
    box-sizing: border-box;
    margin: 0 auto !important;
    padding: 0;
    max-width: 1200px !important;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #1c5664;
}

.logo {
    font-size: 2rem;
    font-weight: bold;
    color: #fff;
    z-index: 2;
    padding-top: 5%;
    top: 2.5rem;
    left: 20%;
    text-decoration: none;
}

.logoSpan {
    font-family: cursive;
}

.parentNav {
    padding-top: 10%;
    margin: 0 auto;
}

a.backBtn::before {
    clear: both;
}

a.backBtn {
    color: white;
    padding: 5px 15px;
    background: transparent;
    border: 2px solid white;
    font-size: 18px;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.7s ease-in-out;
    float: right;
    line-height: 2em;
}

a.backBtn::after {
    clear: both;
}

a.backBtn:hover {
    color: black;
    background: white;
    border: 2px solid black;
}

.slider {
    width: 800px;
    height: 500px;
    border-radius: 10px;
    overflow: hidden;
    padding-bottom: 10rem;
}

.slides {
    width: 500%;
    height: 500px;
    display: flex;
}

.slides input {
    display: none;
}

.slide {
    width: 20%;
    transition: 2s;
}

.slide img {
    width: 800px;
    height: 500px;
}

.heroHeading {
    color: #fff;
    font-weight: bold;
    letter-spacing: 1px;
    font-size: 40px;
    padding-bottom: 10px;
}


/*css for manual slide navigation*/

.navigation-manual {
    position: absolute;
    width: 800px;
    margin-top: -40px;
    display: flex;
    justify-content: center;
}

.manual-btn {
    border: 2px solid #FFF;
    padding: 5px;
    border-radius: 10px;
    cursor: pointer;
    transition: 1s;
}

.manual-btn:not(:last-child) {
    margin-right: 40px;
}

.manual-btn:hover {
    background: #FFF;
}

#radio1:checked~.first {
    margin-left: 0;
}

#radio2:checked~.first {
    margin-left: -20%;
}

#radio3:checked~.first {
    margin-left: -40%;
}

#radio4:checked~.first {
    margin-left: -60%;
}


/*css for automatic navigation*/

.navigation-auto {
    position: absolute;
    display: flex;
    width: 800px;
    justify-content: center;
    margin-top: 460px;
}

.navigation-auto div {
    border: 2px solid #FFF;
    padding: 5px;
    border-radius: 10px;
    transition: 1s;
}

.navigation-auto div:not(:last-child) {
    margin-right: 40px;
}

#radio1:checked~.navigation-auto .auto-btn1 {
    background: #fff;
}

#radio2:checked~.navigation-auto .auto-btn2 {
    background: #fff;
}

#radio3:checked~.navigation-auto .auto-btn3 {
    background: #fff;
}

#radio4:checked~.navigation-auto .auto-btn4 {
    background: #fff;
}


/* #################################
    RESPONSIVE MEDIA QUERIES
    ########################### */

@media only screen and (max-width:1000px) {
    a.backBtn {
        font-size: 16px;
    }
    .heroHeading {
        font-size: 35px;
    }
}

@media only screen and (max-width:900px) {
    .slide img {
        width: 700px;
        height: 400px;
    }
    .slider {
        width: 700px;
    }
}

@media only screen and (max-width:800px) {
    .parentNav {
        width: 90vw;
        padding-left: 2%;
    }
}

@media only screen and (max-width:700px) {
    .parentNav {
        width: 90vw;
        padding-left: 2%;
    }
    .heroHeading {
        display: flex;
        flex-direction: column-reverse;
        justify-content: center;
    }
    a.backbtn::after,
    a.backbtn::before {
        clear: both;
    }
    a.backBtn {
        float: none;
        padding: 0.5% 4%;
        width: 20%;
        text-align: center;
    }
    .slide img {
        width: 700px;
        height: 400px;
    }
    .slider {
        width: 700px;
    }
}

@media only screen and (max-width:400px) {
    .heroHeading {
        font-size: 28px;
    }
    a.backBtn {
        font-size: 12px;
        padding: 0.1% 4%;
    }
}