:root{--bg: #f7f8fa;--surface: #ffffff;--surface2: #f0f2f5;--border: #e2e5ea;--accent: #2563eb;--accent-hover: #1d4ed8;--accent2: #2563eb;--accent3: #1e3a8a;--text: #111827;--text2: #374151;--muted: #6b7280;--radius: 8px;--bubble-user-bg: #e8eef8;--bubble-ai-bg: #f7f8fa;--bubble-ai-border: #e2e5ea;--bubble-ai-color: #111827}[data-theme=dark]{--bg: #0f1117;--surface: #1a1d24;--surface2: #222530;--border: #2d3142;--accent: #3b82f6;--accent-hover: #2563eb;--accent2: #3b82f6;--accent3: #93c5fd;--text: #f1f3f7;--text2: #d1d5db;--muted: #6b7280;--radius: 8px;--bubble-user-bg: #1e3a5f;--bubble-ai-bg: #1a1d24;--bubble-ai-border: #2d3142;--bubble-ai-color: #e5e7eb}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;transition:background .15s,color .15s;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}input,textarea,select,button{font-family:inherit}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}::-webkit-scrollbar-track{background:transparent}