body.theme-mono {
    background: #f8f8f8;
    color: #111827;
}
.theme-mono .site-header { background: #ffffff; border-bottom: 1px solid #e5e7eb; }
.theme-mono .brand-title,
.theme-mono .nav-links a { color: #111827; }
.theme-mono .nav-links a:hover { color: #4b5563; }
.theme-mono .hero { background: #ffffff; border: 1px solid #e5e7eb; box-shadow: 0 10px 24px rgba(0,0,0,0.06); }
.theme-mono .hero-title { color: #0f172a; }
.theme-mono .hero-description { color: #374151; }
.theme-mono .hero-card,
.theme-mono .article-card,
.theme-mono .quick-page-link { background: #ffffff; border: 1px solid #e5e7eb; color: #111827; }
.theme-mono .article-card:hover { border-color: #111827; box-shadow: 0 8px 24px rgba(0,0,0,0.08); transform: translateY(-1px); }
.theme-mono .hero-link,
.theme-mono .article-card a { color: #111827; text-decoration: underline; }
.theme-mono .tag-cloud a { background: #f3f4f6; border: 1px solid #e5e7eb; color: #111827; }
.theme-mono .section-head { border-bottom: 1px solid #e5e7eb; }
.theme-mono .site-footer { color: #374151; border-top: 1px solid #e5e7eb; }