[data-theme="light"] { --bg: #f0f2f5; --card-bg: #fff; --text: #333; --border: #e0e0e0; }
[data-theme="light"] .sidebar { background:#fff; border-right:1px solid #eee; }
[data-theme="light"] .top-navbar { background:rgba(255,255,255,.95); }
[data-theme="light"] .stat-card { background:#fff; }
[data-theme="light"] .card { background:#fff; }