[data-theme="dark"] {
    --bg: #1a1040;
    --bg-secondary: #121a50;
    --bg-tertiary: #0d2d70;
    --text: #ececff;
    --text-secondary: #a0a8d0;
    --text-muted: #606890;
    --border: #2a2a60;
    --border-light: #222250;
    --accent: #3d9bff;
    --accent-hover: #5aadff;
    --accent-light: #0a1a45;

    --font-sans: "Inter", "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-serif: "Source Serif 4", Charter, Georgia, "Times New Roman", serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Fira Mono", "Cascadia Code", monospace;
    --font-heading: var(--font-sans);
    --font-body: var(--font-sans);

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
}

[data-theme="dark"] .article-content,
[data-theme="dark"] .editor-preview {
    line-height: 1.7;
    font-size: 1.05rem;
    letter-spacing: 0.005em;
}

[data-theme="dark"] .article-content h1,
[data-theme="dark"] .article-header h1 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.005em;
    color: #f0f0ff;
    text-decoration: overline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    padding-top: 0.3em;
}

[data-theme="dark"] .article-content h2,
[data-theme="dark"] .article-content h3,
[data-theme="dark"] .editor-preview h1,
[data-theme="dark"] .editor-preview h2,
[data-theme="dark"] .editor-preview h3,
[data-theme="dark"] .list-page h1,
[data-theme="dark"] .feed-top-bar h2,
[data-theme="dark"] .article-slice-title {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.005em;
    color: #f0f0ff;
}

[data-theme="dark"] .article-content h1 {
    font-size: 2.4rem;
}

[data-theme="dark"] .article-content h2 {
    font-size: 1.7rem;
}

[data-theme="dark"] .article-content h3 {
    font-size: 1.3rem;
}

[data-theme="dark"] .article-content p {
    margin-bottom: 1.15em;
}

[data-theme="dark"] a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.14em;
}

[data-theme="dark"] a:hover {
    color: var(--accent-hover);
}

[data-theme="dark"] .article-content ul {
    list-style: none;
    padding-left: 1.3rem;
}

[data-theme="dark"] .article-content ul li {
    position: relative;
    margin-bottom: 0.4rem;
}

[data-theme="dark"] .article-content ul li::before {
    content: "▸";
    position: absolute;
    left: -1.1rem;
    color: var(--accent);
    font-size: 0.9em;
}

[data-theme="dark"] .article-content ol li::marker {
    color: var(--accent);
    font-weight: 700;
}

[data-theme="dark"] blockquote {
    margin: 1.5rem 0;
    padding: 0.6rem 1.2rem;
    border-left: 3px solid var(--accent);
    background: #111128;
    color: var(--text-secondary);
    font-style: italic;
    border-radius: 0 4px 4px 0;
}

[data-theme="dark"] code,
[data-theme="dark"] pre {
    font-family: var(--font-mono);
    background: #111128;
    border: 1px solid var(--border);
    border-radius: 4px;
}

[data-theme="dark"] code {
    padding: 0.1rem 0.3rem;
    color: #ff8c8c;
    font-size: 0.88em;
}

[data-theme="dark"] pre {
    padding: 1rem;
    overflow-x: auto;
    border-style: double;
}

[data-theme="dark"] table {
    width: 100%;
    border-collapse: collapse;
    background: #111128;
}

[data-theme="dark"] th {
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.78rem;
    background: var(--bg-tertiary);
}

[data-theme="dark"] th,
[data-theme="dark"] td {
    border: 1px solid var(--border);
    padding: 0.7rem 0.9rem;
}

[data-theme="dark"] hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

[data-theme="dark"] ::selection {
    background: #1a3a6a;
    color: #e0e0ff;
}