styles.css

body {
    background-image: url("images/sp.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    width: 100%;
}

html {
    max-width: 1920px;
    max-height: 1000px;
}

.arrow {    
    width: 40px;
}

.hero-sec {
    background-image: url("images/question-mr.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    align-items: center;
    width: 100%;
    height: 300px;
    margin-top: 0px;
    margin-bottom: 0px;
    overflow: hidden;
    position: relative;
    opacity: 0.79;
    z-index: 1;
}

.head-1 {
    text-align: center;
    font-size: 62px;
    background: linear-gradient(to left, blue,lightblue);
    font-family: 'Silkscreen', sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-top: 120px;
    padding-bottom: 170px;
    margin-top: 0px;
    margin-bottom: 0px;
    text-shadow: 2px 2px yellow;
}

.mars {
    width: 180px;
}

.sun {
    width: 280px;
    margin-top: 20em;
}

nav {
    text-align: center;
    background-color: #ffc900;
    border-radius: 20px;
    width: 330px;
    height: 26px;
    padding-top: 8px;
    z-index: 2;
}

.link-a {
    text-decoration: none;
    background: linear-gradient(to left, blue,blue);
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: fle;
    justify-content: center;
}

.nav-div{
    display: flex;
    justify-content: center;
}

.sun-index {
    display: flex;
    justify-content: center;
}

.mars-index {
    display: flex;
    justify-content: center;
    position: relative;
    bottom: 470px;
    float: auto;
}

.about-us-text {
    text-align: center;
    font-size: 62px;
    background: linear-gradient(to left, blue,lightblue);
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-top: 120px;
    padding-bottom: 20px;
    margin-top: 0px;
    margin-bottom: 0px;
    text-shadow: 2px 2px yellow;
}

.about-us-paragraph{
    text-align: center;
    font-size: 23px;
    background: linear-gradient(to left, blue,lightblue);
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-top: 0px;
    padding-bottom: 170px;
    padding-left: 30px;
    padding-right: 30px;
    margin-top: 0px;
    margin-bottom: 0px;
    text-shadow: 2px 2px yellow;
}

@keyframes revolveAroundObject {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
}

table, th, td {
    margin-top: 40px;
    border: 2px solid rebeccapurple;
    color: white;
    background: linear-gradient(to left, yellow,orange);
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-top: 0px;
    margin-bottom: 0px;
    height: 50px;
}

th {
    color: white;
}

.tb {
    margin-left: 40px;
}

.mars-page {
    width: 500px;
    float: left;
    padding-left: 40px;
    padding-bottom: 300px;
}

.sun-page{
    width: 500px;
    float: left;
    padding-left: 20px;
    padding-bottom: 20px;
}

.gif-about {
    display: flex;
    justify-content: center;
    height:400px;
}

.sun-page-1 {
    display: flex;
    justify-content: left;
    width: fit-content;
    float: left;
}

table {
    background-image: url("images/sys.jpg");
}

.table-div {
    margin-top: 100px;
    display: flex;
    justify-content: center;
    padding-bottom: 120px;
}

.sun-para {
    text-align: center;
    font-size: 33px;
    background: linear-gradient(to left, blue,lightblue);
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-weight: bold;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-top: 170px;
    padding-bottom: 170px;
    padding-left: 30px;
    padding-right: 30px;
    margin-top: 0px;
    margin-bottom: 0px;
    text-shadow: 2px 2px yellow;
}

.td-unres {
    width: 73px;
    font-size: 40px;
}

.td-res {
    width: 943px;
    font-size: 40px;
}

@media only screen and (max-width: 1190px) { 

    .table-div{
        margin-top: 0px;
    }

    table {
        background-image: url("images/sys.jpg");
    }    

    .sun-para{
        font-size: 45px;
    }

    table,td,th{
        width: 900px;
    }

    .td-res {
        width: 5343px;
    }

    td {
        font-size: 50px;
    }

    .sun-page-1{
        display: flex;
        justify-content: center;
        padding-bottom: 0px;
        width: 100%;
    }

    .sun-page {
        padding-left: 0px;
    }

    .hero-sec {
        position: relative;
        top: 130px;
    }

    .nav-div {
        position: relative;
        top: 120px;
    }

    nav {
        width: 600px;
        font-size: xx-large;
        height: 50px;
    }

    .head-1 {
        font-size: 150px;
        font-family: 'Silkscreen', sans-serif;
    }

    .hero-sec {
        height: 400px;
    }

    .mars-index{
        bottom: 1000px;
    }

    .sun-index {
        position: relative;
        top: 400px;
    }

    .mars {
        width: 729px;
    }

    .sun {
        width: 800px;
    }

    .about-us-text{
        font-size: 150px;
    }
}