style.css

body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background-color: #506271;
}

* {
    list-style: none;
    text-decoration: none;
}

.navbar {
    width: 100vw;
    height: 6rem;
    display: flex;
    justify-content: space-around;
    align-items: center;
    background-color: #00CC00;
}

.logo img {
    width: 6rem;
}

.submit {
    display: inline-block;
    justify-content: center;
    align-items: center;
    width: 5rem;
    height: 2.3rem;
    margin-left: 1rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    background-color: #000;
    color: #fff;
}

.submit:active {
    background-color: rgb(44, 43, 43);
}

input[type="search"] {
    width: 18rem;
    height: 2.5rem;
    padding: 10px;
    margin-right: 20px;
    border-radius: 10px;
    border: none;
}

.links {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.back img {
    display: flex;
    margin: auto;
    width: 80vw;
    height: 35rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    border-radius: 14px;
}

.heading {
    text-align: center;
    font-weight: bold;
    margin-bottom: 2rem;
    color: #fff;
}

.moviesbox {
    display: grid;
    grid-template-columns: auto auto auto;
    justify-content: space-around;
}

.box1 {
    display: grid;
    align-content: space-between;
    width: 25rem;
    height: 38rem;
    background-color: #fff;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    cursor: pointer;
    margin-bottom: 4rem;
}

.box1 a {
    color: #000;
}

.box1 img {
    width: 25rem;
    height: 30rem;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
}

.movieheading {
    text-align: center;
}

.starts {
    display: flex;
    justify-content: center;
}

.navbar2 {
    display: none;
}

.links2 {
    display: none;
}

.submit2 {
    display: none;
}

.boxbtns {
    display: none;
}

/* media queries for responsive design */
@media screen and (max-width:1030px) {
    .navbar {
        display: none;
    }

    .navbar2 {
        display: flex;
        justify-content: space-around;
        background-color: #00CC00;
        width: 100vw;
        height: 4rem;
        align-items: center;
    }

    .logo2 img {
        display: flex;
        width: 4rem;
        height: 4rem;
    }

    .navbarphonebox {
        display: grid;
        width: 100vw;
        height: 0rem;
        background-color: #78f578;
        justify-content: space-around;
        align-items: space-around;
        transition: 1000ms ease-out;
        overflow: hidden;
    }

    .links2 {
        display: flex;
    }

    .submit2 {
        display: grid;
    }

    .boxbtns {
        display: grid;
    }

    input[type="search"] {
        width: 12rem;
    }

    .submit2 {
        display: inline-block;
        justify-content: center;
        align-items: center;
        width: 5rem;
        height: 2rem;
        margin-left: 1rem;
        border-radius: 8px;
        border: none;
        cursor: pointer;
        background-color: #000;
        color: #fff;
        margin: auto;
    }

    .back img {
        margin-top: 0rem;
        border-radius: 0px;
        width: 100vw;
        height: 14rem;
    }

    .moviesbox {
        grid-template-columns: auto;
        justify-content: space-around;
    }

    .box1 {
        height: 40rem;
        width: 89vw;
    }

    .box1 img {
        height: 30rem;
        width: 89vw;

    }

}