.app{min-height:100vh;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:1rem}.app-header{text-align:center;color:#fff;margin-bottom:2rem}.app-header h1{font-size:2.5rem;margin:0;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.app-header p{font-size:1.2rem;margin:.5rem 0 0;opacity:.9}.app-content{display:grid;grid-template-columns:1fr 1fr;gap:2rem;max-width:1400px;margin:0 auto}.editor-section{background:white;border-radius:12px;padding:1.5rem;box-shadow:0 8px 32px #0000001a}.editor-section h3{margin:0 0 1rem;color:#333;font-size:1.3rem}.mdx-editor-container{height:70vh;border:2px solid #e1e5e9;border-radius:8px;overflow-y:scroll}.mdx-editor-container .mdxeditor{height:100%;border:none;display:flex;flex-direction:column;flex:1}.mdx-editor-container .mdxeditor-toolbar{border-bottom:2px solid #e1e5e9;background:#ffffff;padding:.75rem;min-height:50px;flex-shrink:0;box-shadow:0 2px 4px #0000000d}.mdx-editor-container .mdxeditor-rich-text-editor{flex:1;padding:1.5rem;font-size:15px;line-height:1.7;overflow-y:auto!important;background:#fafbfc;min-height:0}.mdx-editor-container .mdxeditor-rich-text-editor:focus{outline:none}.mdx-editor-container .mdxeditor-rich-text-editor [contenteditable=true]{min-height:100%;overflow-y:visible}.mdx-editor-container .mdxeditor-rich-text-editor::-webkit-scrollbar{width:8px}.mdx-editor-container .mdxeditor-rich-text-editor::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}.mdx-editor-container .mdxeditor-rich-text-editor::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}.mdx-editor-container .mdxeditor-rich-text-editor::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.mdxeditor-popup-container{z-index:9999!important}.mdx-editor-container [data-toolbar-item]{margin:0 2px}.mdx-editor-container [data-toolbar-item] button{padding:6px 10px;border-radius:6px;border:1px solid #d0d7de;background:white;color:#24292f;font-size:14px;transition:all .2s}.mdx-editor-container [data-toolbar-item] button:hover{background:#f3f4f6;border-color:#667eea}.mdx-editor-container [data-toolbar-item] button[data-state=on]{background:#667eea;color:#fff;border-color:#667eea}.mdx-editor-container button[aria-label="Diff mode"]{display:none!important}.markdown-editor{width:100%;height:70vh;border:2px solid #e1e5e9;border-radius:8px;padding:1rem;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:14px;line-height:1.5;resize:vertical;transition:border-color .2s}.markdown-editor:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.preview-section{background:white;border-radius:12px;padding:1.5rem;box-shadow:0 8px 32px #0000001a}.preview-section h3{margin:0 0 1rem;color:#333;font-size:1.3rem}.markdown-preview{height:70vh;overflow-y:auto;border:2px solid #e1e5e9;border-radius:8px;padding:1.5rem;background:#fafbfc}.markdown-preview h1{color:#2d3748;border-bottom:2px solid #e2e8f0;padding-bottom:.5rem}.markdown-preview h2{color:#4a5568;margin-top:2rem}.markdown-preview h3{color:#718096}.markdown-preview code{background:#f7fafc;padding:.2rem .4rem;border-radius:4px;font-size:.9em;color:#e53e3e}.markdown-preview pre{background:#2d3748;color:#f7fafc;padding:1rem;border-radius:8px;overflow-x:auto;margin:1rem 0}.markdown-preview pre code{background:none;color:inherit;padding:0}.markdown-preview blockquote{border-left:4px solid #667eea;margin:1rem 0;padding:.5rem 1rem;background:#f0f4ff;color:#4c51bf}.markdown-preview table{width:100%;border-collapse:collapse;margin:1rem 0}.markdown-preview th,.markdown-preview td{border:1px solid #e2e8f0;padding:.75rem;text-align:left}.markdown-preview th{background:#f7fafc;font-weight:600}.markdown-preview ul,.markdown-preview ol{padding-left:1.5rem}.markdown-preview li{margin:.5rem 0}.markdown-preview a{color:#667eea;text-decoration:none}.markdown-preview a:hover{text-decoration:underline}@media (max-width: 768px){.app-content{grid-template-columns:1fr;gap:1rem}.app-header h1{font-size:2rem}.markdown-editor,.markdown-preview{height:50vh}}