style.css

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

* {
    margin: 0;
    padding: 0;
    font-family: "Poppins";
}

.navbar {
    width: 100%;
    height: 70px;
    display: flex;
    background-color: red;
    align-items: center;
    justify-content: space-between;
}

.navbar h1 {
    font-size: 35px;
    color: #fff;
    font-weight: 400;
    margin-left: 30px;
}

.navbar .navitems {
    display: flex;
    align-items: center;
    justify-content: center;
    list-style: none;
    margin-right: 30px;
}

.navitems li a {
    text-decoration: none;
    margin-left: 20px;
    color: #fff;
}

.main {
    width: 100%;
    min-height: 40rem;
    background-color: gainsboro;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}


.main img {
    width: 500px;
}

.content {
    width: 600px;
    height: 300px;
    display: flex;
    align-items: flex-start;
    justify-content: space-around;
    flex-direction: column;
}

.content h1 {
    font-size: 50px;
}

.content button {
    padding: 10px 30px;
    background-color: red;
    border-radius: 5px;
    color: #fff;
    border: 1px solid #fff;
}

footer {
    width: 100%;
    height: 50px;
    background-color: green;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

@media (max-width: 768px) {
    .content{
        text-align: center;
        width: 90%;
        height: 350px;
        align-items: center;
    }
}