.app{height:100vh;display:flex;flex-direction:column}.header{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:1rem 2rem;text-align:center;box-shadow:0 2px 4px #0000001a}.header h1{font-size:2rem;margin-bottom:.5rem}.header p{opacity:.9;font-size:1.1rem}.container{flex:1;display:flex;min-height:0}.editor-panel,.preview-panel{flex:1;display:flex;flex-direction:column;background:white;margin:1rem;border-radius:8px;box-shadow:0 4px 6px #0000001a;overflow:hidden}.panel-header{background:#f8f9fa;padding:1rem;border-bottom:1px solid #e9ecef;display:flex;justify-content:space-between;align-items:center}.panel-header h2{font-size:1.2rem;color:#495057;margin:0}.buttons{display:flex;gap:.5rem}.btn{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;transition:all .2s}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover{background:#5a6268}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover{background:#c82333}.editor{flex:1;border:none;padding:1rem;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:14px;line-height:1.5;resize:none;outline:none;background:#fafafa}.editor:focus{background:white}.preview{flex:1;padding:1rem;overflow-y:auto;line-height:1.6}.preview h1{font-size:2rem;margin:1rem 0;padding-bottom:.5rem;border-bottom:2px solid #e9ecef;color:#2c3e50}.preview h2{font-size:1.5rem;margin:1.5rem 0 1rem;color:#34495e}.preview h3{font-size:1.25rem;margin:1rem 0 .5rem;color:#34495e}.preview p{margin:1rem 0}.preview ul,.preview ol{margin:1rem 0;padding-left:2rem}.preview li{margin:.25rem 0}.preview blockquote{border-left:4px solid #667eea;margin:1rem 0;padding:.5rem 1rem;background:#f8f9fa;color:#6c757d}.preview code{background:#f1f3f4;padding:.2rem .4rem;border-radius:3px;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:.9em}.preview pre{background:#f8f9fa;padding:1rem;border-radius:4px;overflow-x:auto;margin:1rem 0}.preview pre code{background:none;padding:0}.preview a{color:#667eea;text-decoration:none}.preview a:hover{text-decoration:underline}.preview hr{border:none;border-top:2px solid #e9ecef;margin:2rem 0}.preview strong{font-weight:600;color:#2c3e50}.preview em{font-style:italic;color:#495057}.footer{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:1.5rem 2rem;text-align:center;border-top:none;position:relative;overflow:hidden}.footer:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);animation:shimmer 3s infinite}@keyframes shimmer{0%{left:-100%}to{left:100%}}.coffee-button{display:inline-block;position:relative;z-index:1}.footer-credit{margin-top:.75rem;font-size:.875rem;color:#ffffffe6;position:relative;z-index:1}.footer-link{color:#fff;font-weight:600;text-decoration:none}.footer-link:hover{text-decoration:underline}@media (max-width: 768px){.container{flex-direction:column}.editor-panel,.preview-panel{margin:.5rem}.header{padding:1rem}.header h1{font-size:1.5rem}.header p{font-size:1rem}.panel-header{flex-direction:column;gap:.5rem;align-items:flex-start}.buttons{align-self:stretch}.btn{flex:1}.footer{padding:1rem}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f5f5f5;color:#333}#root{height:100vh}