Readability focused *forced* stylesheet for Calibre Reader.

calibre-reader.css

/* Font imports */
@import url('https://fonts.googleapis.com/css2?family=Roboto+Slab:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

/* Base styles */
body {
    font-family: 'Roboto Slab', 'Helvetica Neue', 'Segoe UI', 'Arial', sans-serif !important;
    font-size: 1rem !important;
    line-height: 1.6 !important;
    color: #333333 !important;
    background-color: #FAFAF9 !important;
    margin: 1.25rem auto !important; /* Center the content and ensure margin on both sides */
}

/* Headings style */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', 'Helvetica Neue', 'Segoe UI', 'Arial', sans-serif !important; /* Use Roboto with system fallbacks for headings */
    color: #292929 !important;
    margin-top: 1.25rem !important;
    margin-bottom: 0.7rem !important;
    line-height: 1.3 !important;
}

/* Monospaced font style */
code, pre {
    font-family: 'Roboto Mono', 'Courier New', monospace !important; /* Use Roboto Mono with system fallbacks for monospace */
    background-color: #F5F5F5 !important;
    border: 1px solid #CCCCCC !important;
    padding: 0.313rem !important;
    overflow: auto !important;
}

/* Blockquote styling for better visibility */
blockquote {
    border-left: 0.188rem solid #CCCCCC !important;
    margin: 0.625rem !important;
    padding-left: 0.95rem !important;
    font-style: italic !important;
    background-color: #F9F9F9 !important;
}

/* Paragraph styles */
p {
    text-rendering: optimizelegibility !important;
    letter-spacing: 0.03em !important;
    line-height: 1.6 !important;
    margin-bottom: 1rem !important;
}

/* Links */
a {
    color: #007bff !important; /* Change link color */
    text-decoration: underline !important; /* Underline links */
}

/* Lists */
ul, ol {
    margin-bottom: 1rem !important;
    margin-left: 1.25rem !important; /* Adjust list indentation */
}

li {
    margin-bottom: 0.5rem !important; /* Adjust spacing between list items */
}

/* Images */
img {
    max-width: 100% !important; /* Ensure images don't overflow */
    height: auto !important; /* Maintain aspect ratio */
    display: block !important; /* Prevent whitespace below images */
    margin: 0 auto !important; /* Center images */
}

/* Tables */
table {
    width: 100% !important; /* Ensure tables expand to fill available space */
    border-collapse: collapse !important; /* Collapse table borders */
}

th, td {
    border: 1px solid #ddd !important; /* Add borders to table cells */
    padding: 0.5rem !important; /* Adjust cell padding */
}

/* Footnotes */
sup {
    vertical-align: super !important; /* Position superscript for footnotes */
}

.footnote {
    font-size: 0.8em !important; /* Adjust footnote text size */
    color: #666 !important; /* Change footnote text color */
}