*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-bg: #f8fafc;--color-surface: #ffffff;--color-sidebar: #1e293b;--color-sidebar-text: #cbd5e1;--color-sidebar-hover: #334155;--color-sidebar-active: #2563eb;--color-border: #e2e8f0;--color-text: #0f172a;--color-text-muted: #64748b;--color-ai-bg: #eff6ff;--color-ai-border: #bfdbfe;--color-error: #dc2626;--color-danger: #ef4444;--radius: 8px;--radius-sm: 4px;--shadow: 0 1px 3px rgba(0,0,0,.08);font-size:14px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--color-text)}body{background:var(--color-bg);height:100dvh;overflow:hidden}#root{height:100dvh;display:flex;flex-direction:column}button{cursor:pointer;border:none;background:none;font:inherit}input,textarea{font:inherit;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:8px 12px;outline:none;width:100%;background:var(--color-surface);color:var(--color-text)}input:focus,textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #2563eb26}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}