@import url('https://fonts.googleapis.com/css?family=Roboto:400,300,500');

body {
    margin: 0;
    font-family: Roboto, sans-serif;
}

.heading {
    color: #261094;
    text-align: center;
}

@import url('//fonts.googleapis.com/css?family=Roboto:400,300,500');

body {
    margin: 0;
    font-family: Roboto, sans-serif;
}

.heading {
    color: #261094;
    text-align: center;
}

Use protocol-relative URL for Google Fonts
Use protocol-relative URL for Google Fonts
