.body {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.github {
    background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAAxHpUWHRSYXcgcHJvZmlsZSB0eXBlIGV4aWYAAHjabVBbDsQgCPz3FHsEZVDxOPaxyd5gj78otGmbncQRmDAiYf9+3uE1QIkD5yqllRIV3LhR10CioU9OkSdbQq6lez2cAmkJesNSKWej1dNpYFfXKF+MZHVhuQuN3V8eRv4QxkRjiM2NmhuBTEhu0O1bsTSp1y8se7xD7IRBdbV2yqY9c666vS3rOyDakRCVAbYBMA4C+hAm6zqUoTFNZhw70YX829OB8AMSzFl0MKaMggAAAYNpQ0NQSUNDIHByb2ZpbGUAAHicfZE9SMNAHMVfU6VSKw4GFHHIUJ3soiKOWoUiVAi1QqsOJpd+QZOGJMXFUXAtOPixWHVwcdbVwVUQBD9AXF2cFF2kxP8lhRaxHhz34929x907QKiXmW53zQK64VipRFzKZFel0CvC6IWIQYQUZptzspxEx/F1jwBf72I8q/O5P0eflrMZEJCIZ5lpOcQbxNObjsl5n1hkRUUjPicet+iCxI9cV31+41zwWOCZopVOzROLxFKhjdU2ZkVLJ54ijmq6QflCxmeN8xZnvVxlzXvyF0Zyxsoy12mOIIFFLEGGBBVVlFCGgxitBik2UrQf7+Af9vwyuVRylcDIsYAKdCieH/wPfndr5ycn/KRIHOh+cd2PUSC0CzRqrvt97LqNEyD4DFwZLX+lDsx8kl5radEjoH8buLhuaeoecLkDDD2ZiqV4UpCmkM8D72f0TVlg4BYIr/m9Nfdx+gCkqavkDXBwCIwVKHu9w7t72nv790yzvx9M33KX4EdTAgAADXppVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+Cjx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IlhNUCBDb3JlIDQuNC4wLUV4aXYyIj4KIDxyZGY6UkRGIHhtbG5zOnJkZj0iaHR0cDovL3d3dy53My5vcmcvMTk5OS8wMi8yMi1yZGYtc3ludGF4LW5zIyI+CiAgPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIKICAgIHhtbG5zOnhtcE1NPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvbW0vIgogICAgeG1sbnM6c3RFdnQ9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9zVHlwZS9SZXNvdXJjZUV2ZW50IyIKICAgIHhtbG5zOkdJTVA9Imh0dHA6Ly93d3cuZ2ltcC5vcmcveG1wLyIKICAgIHhtbG5zOmRjPSJodHRwOi8vcHVybC5vcmcvZGMvZWxlbWVudHMvMS4xLyIKICAgIHhtbG5zOnRpZmY9Imh0dHA6Ly9ucy5hZG9iZS5jb20vdGlmZi8xLjAvIgogICAgeG1sbnM6eG1wPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvIgogICB4bXBNTTpEb2N1bWVudElEPSJnaW1wOmRvY2lkOmdpbXA6NjQyOTgyZmQtY2FhOC00MjM3LWIwNGMtZDIxNDgyN2NmM2ExIgogICB4bXBNTTpJbnN0YW5jZUlEPSJ4bXAuaWlkOjRjYmJlYjRlLWU5YjYtNDM4Zi04Mjc0LTgwYzBkZjE4YzkwNSIKICAgeG1wTU06T3JpZ2luYWxEb2N1bWVudElEPSJ4bXAuZGlkOjE3M2MwOTViLWFjMDItNGRmNC1hMWNiLWFhZWMwZmI2YTNmOSIKICAgR0lNUDpBUEk9IjIuMCIKICAgR0lNUDpQbGF0Zm9ybT0iTWFjIE9TIgogICBHSU1QOlRpbWVTdGFtcD0iMTY5NzA1NTgyMDA2MjE2MSIKICAgR0lNUDpWZXJzaW9uPSIyLjEwLjM0IgogICBkYzpGb3JtYXQ9ImltYWdlL3BuZyIKICAgdGlmZjpPcmllbnRhdGlvbj0iMSIKICAgeG1wOkNyZWF0b3JUb29sPSJHSU1QIDIuMTAiCiAgIHhtcDpNZXRhZGF0YURhdGU9IjIwMjM6MTA6MTFUMTM6MjM6NDAtMDc6MDAiCiAgIHhtcDpNb2RpZnlEYXRlPSIyMDIzOjEwOjExVDEzOjIzOjQwLTA3OjAwIj4KICAgPHhtcE1NOkhpc3Rvcnk+CiAgICA8cmRmOlNlcT4KICAgICA8cmRmOmxpCiAgICAgIHN0RXZ0OmFjdGlvbj0ic2F2ZWQiCiAgICAgIHN0RXZ0OmNoYW5nZWQ9Ii8iCiAgICAgIHN0RXZ0Omluc3RhbmNlSUQ9InhtcC5paWQ6OTNiY2I1MzctYzQ3ZS00ZTI0LTk4NjQtMDhmZjE1YWVlYzhkIgogICAgICBzdEV2dDpzb2Z0d2FyZUFnZW50PSJHaW1wIDIuMTAgKE1hYyBPUykiCiAgICAgIHN0RXZ0OndoZW49IjIwMjMtMTAtMTFUMTM6MjM6NDAtMDc6MDAiLz4KICAgIDwvcmRmOlNlcT4KICAgPC94bXBNTTpIaXN0b3J5PgogIDwvcmRmOkRlc2NyaXB0aW9uPgogPC9yZGY6UkRGPgo8L3g6eG1wbWV0YT4KICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC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}

.google {
    background-image: url(data:image/svg+xml;base64,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);
}

.login-btn {
    transition: background-color .3s, box-shadow .3s;

    display: block;
    margin-bottom: 10px;
    padding: 12px 16px 12px 42px;
    border: none;
    border-radius: 3px;
    box-shadow: 0 -1px 0 rgba(0, 0, 0, .04), 0 1px 1px rgba(0, 0, 0, .25);

    color: #757575;
    cursor: pointer;

    font-size: 14px;
    font-weight: 500;
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Fira Sans","Droid Sans","Helvetica Neue",sans-serif;

    background-color: white;
    background-repeat: no-repeat;
    background-position: 12px 11px;

    &:hover {
        box-shadow: 0 -1px 0 rgba(0, 0, 0, .04), 0 2px 4px rgba(0, 0, 0, .25);
    }

    &:active {
        background-color: #eeeeee;
    }

    &:focus {
        outline: none;
        box-shadow: 
        0 -1px 0 rgba(0, 0, 0, .04),
        0 2px 4px rgba(0, 0, 0, .25),
        0 0 0 3px #c8dafc;
    }

    &:disabled {
        filter: grayscale(100%);
        background-color: #ebebeb;
        box-shadow: 0 -1px 0 rgba(0, 0, 0, .04), 0 1px 1px rgba(0, 0, 0, .25);
        cursor: not-allowed;
    }
}