*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg-app:#fafafa;--bg-sidebar:#f4f4f5;--bg-surface:#ffffff;--bg-subtle:#f4f4f5;--bg-hover:#f4f4f5;--bg-active:#e4e4e7;--border-subtle:#f4f4f5;--border:#e4e4e7;--border-strong:#d4d4d8;--text-main:#09090b;--text-secondary:#52525b;--text-muted:#a1a1aa;--text-inverse:#ffffff;--accent:#18181b;--accent-hover:#27272a;--accent-light:#f4f4f5;--danger:#dc2626;--danger-light:#fef2f2;--success:#16a34a;--success-light:#f0fdf4;--warning:#d97706;--font-sans:"Inter","Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px rgba(0,0,0,0.02);--shadow-md:0 4px 12px rgba(0,0,0,0.03);--shadow-dropdown:0 8px 24px rgba(0,0,0,0.06);--transition-fast:150ms ease}[data-theme=dark]{--bg-app:#09090b;--bg-sidebar:#121212;--bg-surface:#18181b;--bg-subtle:#27272a;--bg-hover:#27272a;--bg-active:#3f3f46;--border-subtle:#27272a;--border:#3f3f46;--border-strong:#52525b;--text-main:#fafafa;--text-secondary:#a1a1aa;--text-muted:#71717a;--text-inverse:#18181b;--accent:#fafafa;--accent-hover:#e4e4e7;--accent-light:#27272a;--danger:#ef4444;--danger-light:#450a0a;--success:#10b981;--success-light:#064e3b}body,html{min-height:100vh;background-color:var(--bg-app);color:var(--text-main);font-family:var(--font-sans);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}button{cursor:pointer;border:none;background:none}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.tiptap-content{min-h:320px;padding:var(--space-4);font-size:15px;line-height:1.65;color:var(--text-main);background:var(--bg-surface);outline:none}.tiptap-content p{margin-bottom:var(--space-3)}.tiptap-content h1{font-size:20px;margin-top:var(--space-4)}.tiptap-content h1,.tiptap-content h2{font-weight:600;margin-bottom:var(--space-2)}.tiptap-content h2{font-size:18px;margin-top:var(--space-3)}.tiptap-content h3{font-size:16px;font-weight:600;margin-top:var(--space-3);margin-bottom:var(--space-1)}.tiptap-content ol,.tiptap-content ul{padding-left:var(--space-5);margin-bottom:var(--space-3)}.tiptap-content hr{border:none;border-top:1px solid var(--border);margin:var(--space-4) 0}.tiptap-content blockquote{border-left:3px solid var(--border-strong);padding-left:var(--space-3);color:var(--text-secondary);font-style:italic;margin-bottom:var(--space-3)}.tiptap-content img{max-width:100%;height:auto;border-radius:var(--radius-sm);border:1px solid var(--border);margin:var(--space-2) 0}.tiptap-content table{width:100%;border-collapse:collapse;margin:var(--space-3) 0}.tiptap-content td,.tiptap-content th{border:1px solid var(--border);padding:8px 12px;text-align:left}.tiptap-content th{background:var(--bg-subtle);font-weight:600}