:root{--color-bg: #111827;--color-surface: #1f2937;--color-surface-2: #374151;--color-border: #374151;--color-text: #f3f4f6;--color-text-muted: #9ca3af;--color-accent: #22c55e;--color-danger: #ef4444;--color-info: #60a5fa}[data-theme=light]{--color-bg: #e5e7eb;--color-surface: #ffffff;--color-surface-2: #f3f4f6;--color-border: #d1d5db;--color-text: #111827;--color-text-muted: #6b7280;--color-accent: #16a34a;--color-danger: #dc2626;--color-info: #2563eb}body{background:var(--color-bg);color:var(--color-text);margin:0;font-family:system-ui,sans-serif}.demo-banner{background:linear-gradient(90deg,#f59e0b,#f97316);color:#1a1a1a;text-align:center;padding:8px 16px;font-size:.9rem;font-weight:600;position:sticky;top:0;z-index:900}