[data-theme="dark"] {
    /* --- BRAND COLORS --- */
    --brand-primary: #818cf8;       /* Indigo 400 */
    --brand-primary-hover: #6366f1; /* Indigo 500 */
    --brand-secondary: #fbbf24;     /* Amber 400 */
    
    /* --- BACKGROUNDS --- */
    --bg-body: #0f172a;             /* Slate 900 */
    --bg-surface: #1e293b;          /* Slate 800 */
    --bg-sidebar: #1e293b;          /* Slate 800 */
    --bg-header: rgba(30, 41, 59, 0.8);
    --bg-hover: #334155;            /* Slate 700 */
    --bg-active: #1e1b4b;           /* Indigo 950 */
    
    /* --- TEXT --- */
    --text-main: #f8fafc;           /* Slate 50 */
    --text-muted: #94a3b8;          /* Slate 400 */
    --text-on-brand: #ffffff;
    
    /* --- BORDERS --- */
    --border-subtle: #334155;       /* Slate 700 */
    --border-strong: #475569;       /* Slate 600 */
    
    /* --- SHADOWS --- */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);

    /* --- ALERTS --- */
    --alert-success-bg: #064e3b;
    --alert-success-text: #6ee7b7;
    --alert-danger-bg: #7f1d1d;
    --alert-danger-text: #fca5a5;
    --alert-warning-bg: #78350f;
    --alert-warning-text: #fcd34d;
}