/* Dark Mode Override */
[data-theme="dark"] {
    --bg-color: #0f172a;
    --section-bg: #1e293b;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --card-bg: #1e293b;
    --shadow-md: 0 4px 8px rgba(0,0,0,0.4);
}

/* Color Presets (Theme Switcher এর জন্য) */
.theme-red { --primary-color: #e84393; }
.theme-green { --primary-color: #27ae60; }
.theme-purple { --primary-color: #8e44ad; }
.theme-orange { --primary-color: #f39c12; }