Style1.css

.all {
    margin: 0;
    Padding: 0;
}

.logo {
    width: 100%;
    display: flex;
}

.logo-link {
    display: flex;
    align-items: center;
}

.wrapper {
    width: 100%;
    position: fixed;
    background-color: rgb(255, 255, 255);
    text-align: center;
    box-shadow: 5px -11px 36px rgba(0, 0, 0, 0.703);
}

.nav ul {
    padding: 0;
    list-style-type: none;
}

nav {
    display: flex;
    justify-content: space-between;
    transition: 0.3s;
}

    nav ul {
        display: flex;
        list-style-type: none;
        margin: 0;
    }

    nav li {
        font-size: 20px;
        padding: 0 19px;
    }

.menu-link {
    text-decoration: none;
    font-weight: bold;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-shadow: 0.5px 0.1px #000000;
    display: inline-block;
    display: block;
    font-size: 19px;
    padding-top: 31px;
    padding-bottom: 25px;
}

.menu-hover:hover {
    background-color: rgba(193, 193, 193, 0.605);
}

.background {
    position: relative;
    background: url(images/background.jpg);
    width: 100%;
    height: 800px;
    background-position: bottom;
    background-size: cover;
    background-repeat: no-repeat;
}

    .background::after {
        content: "";
        display: block;
        height: 100%;
        position: absolute;
        bottom: 0;
        background-color: rgba(1,0,0,0.3);
        width: 100%;
    }

.wrapper {
    color: white;
    z-index: 3;
}

.main-box {
    border-width: 0px;
    position: absolute;
    left: 10%;
    top: 200px;
    width: 80%;
    height: 90%;
    background-color: rgba(254, 254, 254, 1);
    border-radius: 10px;
    box-shadow: 5px -11px 36px rgba(0, 0, 0, 0.589);
}

.index-title {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    margin: 0 30px;
    font-size: 27px;
    font-weight: bold;
    max-width: 410px;
}

.Sign-Up {
    border-width: 0px;
    position: absolute;
    left: 10%;
    top: 200px;
    width: 80%;
    background-color: rgba(254, 254, 254, 1);
    border-radius: 10px;
    box-shadow: 5px -11px 36px rgba(0, 0, 0, 0.589);
}

.Sign-Up-title {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    margin: 0 30px;
    font-size: 27px;
    font-weight: bold;
    max-width: 410px;
    color: black;
}

.boxed {
    border: 5px solid green;
    background: url(images/science.png);
    position: absolute;
    right: 70%;
    bottom: 35%;
    width: 20%;
    height: 30%;
}

.box {
    border: 5px solid red;
    background: url(images/math.jpg);
    position: absolute;
    left: 40%;
    bottom: 35%;
    width: 20%;
    height: 30%;
}