:root,[data-theme=light]{--bg-primary:#fff;--bg-secondary:#f9fafb;--bg-gradient:#f0f4ff;--text-primary:#1a1a1a;--text-secondary:#4b5563;--text-muted:#9ca3af;--border-color:#e5e7eb;--card-bg:#fff;--card-shadow:rgba(0,0,0,.05);--toggle-bg:#1a1a1a;--toggle-color:#fff;--accent-primary:#6366f1;--accent-hover:#4f46e5;--success-bg:#f0fdf4;--success-border:#a7f3d0;--warning-bg:#fef3c7;--danger-bg:#fef2f2}[data-theme=dark]{--bg-primary:#0f0f0f;--bg-secondary:#1a1a1a;--bg-gradient:#1a1a2e;--text-primary:#f9fafb;--text-secondary:#d1d5db;--text-muted:#6b7280;--border-color:#2d2d2d;--card-bg:#1a1a1a;--card-shadow:rgba(0,0,0,.3);--toggle-bg:#f9fafb;--toggle-color:#1a1a1a;--accent-primary:#818cf8;--accent-hover:#a5b4fc;--success-bg:#064e3b;--success-border:#065f46;--warning-bg:#78350f;--danger-bg:#7f1d1d}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color .3s ease,color .3s ease}.card-hover{transition:all .2s ease}.card-hover:hover{box-shadow:0 8px 30px var(--card-shadow);transform:translateY(-2px)}a{color:var(--accent-primary);text-decoration:none}a:hover{color:var(--accent-hover)}button{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}