[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --border-color: #404040;
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --shadow: 0 2px 4px rgba(0,0,0,0.3);
}

[data-theme="dark"] body {
    color-scheme: dark;
}