:root{color-scheme:light;--page-background:#f3f4f6;--surface-primary:#fff;--surface-muted:#f8fafc;--border-subtle:#e5e7eb;--text-primary:#111827;--text-secondary:#4b5563;--text-tertiary:#6b7280;--surface-shadow:0 12px 30px rgba(15,23,42,.08);--login-background:linear-gradient(145deg,#f7f9fb,#edf2f7)}:root[data-theme=dark]{color-scheme:dark;--page-background:#020617;--surface-primary:#0f172a;--surface-muted:#111c2f;--border-subtle:rgba(148,163,184,.24);--text-primary:#f9fafb;--text-secondary:#e2e8f0;--text-tertiary:#94a3b8;--surface-shadow:0 20px 48px rgba(2,6,23,.6);--login-background:linear-gradient(135deg,#0b1120,#111c2f)}body,html{background:var(--page-background);color:var(--text-primary);transition:background .3s ease,color .3s ease}body{min-height:100vh}