header {
    padding: 10%;
    text-align: center;
}

header h1 {
    font-size: 80px;
    font-family: Arial, Helvetica, sans-serif;
}

header p {
    font-size: 25px;
    font-family: Arial, Helvetica, sans-serif;
}

@media screen and (max-width: 850px) {
    header img {
        width: 100%;
    }

    header {
        padding: 100px 10px 50px 10px;
    }
}

@media screen and (max-width: 540px) {
    header h1 {
        font-size: 70px;
    }

    header p {
        font-size: 20px;
    }
}