The css file are crashed [closed]

I have a problem, after using word to retrieve all of my text present in the html pages, my website no longer works. No changes have been made to either the html code or the CSS codes for the CSS code does not work and displays incomprehensible characters.

/* Code CSS dans le navigateur */
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/* Code CSS normal */
    body {
    max-width: max-content;
}

.ExProj {
    margin-left: auto;
    margin-right: auto;
    margin-top: 2%;
    margin-bottom: 2%;
    width: 100%;
}