:root {
    --primary-color: #07c160;
    --text-color: #333;
    --bg-color: #fff;
    --border-color: #eee;
    --code-bg: #f6f8fa;
    --quote-border: #07c160;
    --quote-bg: #f9f9f9;
    --link-color: #07c160;
    --heading-color: #333;
    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --img-radius: 0px;
    --img-shadow: none;
}

/* Theme: Geek Black */
[data-theme="geek"] {
    --primary-color: #000;
    --text-color: #2c3e50;
    --heading-color: #000;
    --code-bg: #282c34;
    --quote-border: #000;
    --quote-bg: #f8f8f8;
    --link-color: #000;
}

/* Theme: Pastel (Pink) */
[data-theme="pastel"] {
    --primary-color: #ff9a9e;
    --text-color: #555;
    --heading-color: #ff758c;
    --code-bg: #fff0f5;
    --quote-border: #fad0c4;
    --quote-bg: #fffbfb;
    --link-color: #ff758c;
}

/* Theme: Notion (Clean & Serif/Sans mix) */
[data-theme="notion"] {
    --primary-color: #37352f;
    --text-color: #37352f;
    --heading-color: #37352f;
    --code-bg: #f7f6f3;
    --quote-border: #37352f;
    --quote-bg: transparent;
    --link-color: #37352f;
    --border-color: #e0e0e0;
}

/* Image Styles (Controlled by JS) */
[data-img-style="rounded"] {
    --img-radius: 8px;
}
[data-img-style="shadow"] {
    --img-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
[data-img-style="both"] {
    --img-radius: 8px;
    --img-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

body {
    margin: 0;
    font-family: var(--font-base);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f3f4f6;
}

/* WeChat Preview Styles - This is what gets copied */
#preview-content {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-color);
    word-break: break-all;
    text-align: justify;
    padding: 20px;
    background: #fff; /* Ensure white background for copy */
}

/* Notion Specific Overrides */
[data-theme="notion"] #preview-content {
    font-family: "Lyon-Text", Georgia, ui-serif, serif; /* Serif for reading */
    line-height: 1.8;
}
[data-theme="notion"] #preview-content h1,
[data-theme="notion"] #preview-content h2,
[data-theme="notion"] #preview-content h3 {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol"; /* Sans for headings */
}

#preview-content h1, 
#preview-content h2, 
#preview-content h3 {
    margin-top: 1.5em;
    margin-bottom: 0.8em;
    font-weight: bold;
    color: var(--heading-color);
    line-height: 1.3;
}

#preview-content h1 {
    font-size: 1.6em;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.3em;
    text-align: center;
}

/* Geek theme H1 is different */
[data-theme="geek"] #preview-content h1 {
    border-bottom: 3px solid #000;
    text-align: left;
}

/* Notion theme H1 is minimal */
[data-theme="notion"] #preview-content h1 {
    border-bottom: 1px solid #eee;
    text-align: left;
    font-size: 2em;
}

#preview-content h2 {
    font-size: 1.3em;
    display: block; /* WeChat friendly */
    border-left: 5px solid var(--primary-color);
    padding-left: 10px;
    border-bottom: none;
}

/* Notion theme H2 */
[data-theme="notion"] #preview-content h2 {
    border-left: none;
    padding-left: 0;
    font-size: 1.5em;
    border-bottom: 1px solid #eee;
    padding-bottom: 6px;
}

#preview-content h3 {
    font-size: 1.1em;
    font-weight: bold;
    margin-top: 1.2em;
}

[data-theme="notion"] #preview-content h3 {
    font-size: 1.25em;
}

#preview-content p {
    margin-bottom: 1.5em;
    text-align: justify;
}

#preview-content ul, 
#preview-content ol {
    margin-bottom: 1.5em;
    padding-left: 20px;
}

#preview-content li {
    margin-bottom: 0.2em;
}

/* Blockquote Styles */
#preview-content blockquote {
    margin: 1.5em 0;
    padding: 1em;
    background-color: var(--quote-bg);
    border-left: 4px solid var(--quote-border);
    color: #666;
    font-size: 0.95em;
    border-radius: 4px;
}

[data-theme="notion"] #preview-content blockquote {
    border-left: 3px solid currentcolor;
    padding-left: 1em;
    font-style: italic;
    color: inherit;
    opacity: 0.8;
}

/* Inline Code */
#preview-content code {
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
    font-size: 0.9em;
    padding: 2px 5px;
    background-color: rgba(27, 31, 35, 0.05);
    color: #d63384;
    border-radius: 4px;
    margin: 0 2px;
}

[data-theme="notion"] #preview-content code {
    color: #EB5757;
    background: rgba(135,131,120,0.15);
}

/* Code Blocks */
#preview-content pre {
    background-color: #282c34;
    padding: 1em;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5em 0;
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
    line-height: 1.5;
    position: relative;
}

[data-theme="notion"] #preview-content pre {
    background-color: #f7f6f3;
    border-radius: 4px;
}
[data-theme="notion"] #preview-content pre code {
    color: #37352f;
    text-shadow: none;
}

#preview-content pre code {
    background-color: transparent;
    color: #abb2bf;
    padding: 0;
    font-size: 13px;
    border-radius: 0;
    margin: 0;
}

/* Images */
#preview-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5em auto;
    border-radius: var(--img-radius);
    box-shadow: var(--img-shadow);
}

/* Footnotes */
.footnote-ref {
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.8em;
    vertical-align: super;
    margin-left: 2px;
}

.footnotes-sep {
    border-top: 1px solid #ddd;
    margin-top: 3em;
    margin-bottom: 1.5em;
    width: 30%;
}

.footnotes-list {
    font-size: 0.9em;
    color: #888;
}

.footnotes-list ol {
    padding-left: 20px;
}

.footnotes-list li {
    margin-bottom: 0.5em;
    word-break: break-all;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}
::-webkit-scrollbar-track {
    background: transparent;
}