:root{--color-primary: hsl(262, 83%, 58%);--color-primary-dark: hsl(262, 83%, 48%);--color-primary-light: hsl(262, 83%, 68%);--color-secondary: hsl(195, 100%, 50%);--color-accent: hsl(330, 100%, 60%);--bg-primary: hsl(240, 15%, 9%);--bg-secondary: hsl(240, 12%, 12%);--bg-tertiary: hsl(240, 10%, 16%);--bg-elevated: hsl(240, 12%, 18%);--text-primary: hsl(0, 0%, 95%);--text-secondary: hsl(0, 0%, 70%);--text-tertiary: hsl(0, 0%, 50%);--border-primary: hsl(240, 10%, 25%);--border-secondary: hsl(240, 8%, 20%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(138, 80, 255, .3);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .35s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow:hidden}#root{width:100vw;height:100vh;overflow:hidden}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-primary);border-radius:var(--radius-md);transition:background var(--transition-base)}::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}::selection{background:var(--color-primary);color:#fff}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-100%)}to{transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}.app{width:100%;height:100vh;display:flex;flex-direction:column;background:var(--bg-primary)}.header{background:var(--bg-secondary);border-bottom:1px solid var(--border-primary);padding:var(--spacing-md) var(--spacing-xl);display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-md);z-index:100}.header-left{display:flex;align-items:center;gap:var(--spacing-lg)}.logo{display:flex;align-items:center;gap:var(--spacing-sm);font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo-icon{font-size:2rem;filter:drop-shadow(0 0 10px rgba(138,80,255,.5))}.header-actions{display:flex;gap:var(--spacing-sm)}.btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border:none;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff1a;transform:translate(-50%,-50%);transition:width var(--transition-slow),height var(--transition-slow)}.btn:hover:before{width:300px;height:300px}.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-md),var(--shadow-glow)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-primary)}.btn-secondary:hover{background:var(--bg-elevated);border-color:var(--color-primary)}.btn-icon{padding:var(--spacing-sm);background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-primary)}.btn-icon:hover{color:var(--color-primary);border-color:var(--color-primary);background:var(--bg-elevated)}.main-content{flex:1;display:flex;overflow:hidden}.editor-container,.preview-container{display:flex;flex-direction:column;overflow:hidden;flex-shrink:0}.editor-container{border-right:none}.resizer{width:4px;background:var(--border-primary);cursor:col-resize;position:relative;flex-shrink:0;transition:background var(--transition-base);-webkit-user-select:none;user-select:none}.resizer:hover,.resizer.resizing{background:var(--color-primary)}.resizer:hover .resizer-line,.resizer.resizing .resizer-line{opacity:1}.resizer-line{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:40px;background:var(--color-primary);border-radius:var(--radius-sm);opacity:0;transition:opacity var(--transition-base);box-shadow:0 0 10px #8a50ff80}.resizer.resizing{background:var(--color-primary)}.panel-header{background:var(--bg-secondary);padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--border-primary);display:flex;align-items:center;justify-content:space-between}.panel-title{font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);display:flex;align-items:center;gap:var(--spacing-sm)}.toolbar{background:var(--bg-secondary);border-bottom:1px solid var(--border-primary);padding:var(--spacing-sm) var(--spacing-md);display:flex;align-items:center;gap:var(--spacing-sm);flex-wrap:wrap;overflow-x:auto}.toolbar-group{display:flex;align-items:center;gap:var(--spacing-xs)}.toolbar-divider{width:1px;height:24px;background:var(--border-primary);margin:0 var(--spacing-xs)}.btn-toolbar{display:flex;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:var(--spacing-sm);min-width:32px;height:32px;background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base);font-size:.875rem;white-space:nowrap}.btn-toolbar:hover{background:var(--bg-tertiary);border-color:var(--border-primary);color:var(--text-primary)}.btn-toolbar:active{background:var(--bg-elevated);transform:scale(.95)}.toolbar-label{font-size:.8125rem;font-weight:500}.toolbar-dropdown{position:relative}.toolbar-dropdown:hover .toolbar-dropdown-menu{display:block}.toolbar-dropdown-menu{display:none;position:absolute;top:100%;left:0;margin-top:var(--spacing-xs);background:var(--bg-elevated);border:1px solid var(--border-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:100;min-width:180px;overflow:hidden;animation:fadeIn var(--transition-fast)}.toolbar-dropdown-menu button{width:100%;padding:var(--spacing-sm) var(--spacing-md);background:transparent;border:none;color:var(--text-primary);text-align:left;cursor:pointer;transition:all var(--transition-base);display:flex;align-items:center;gap:var(--spacing-sm);font-size:.875rem}.toolbar-dropdown-menu button:hover{background:var(--bg-tertiary);color:var(--color-primary)}.heading-preview{font-weight:700;color:var(--color-primary);min-width:28px}.heading-preview.h1{font-size:1.5rem}.heading-preview.h2{font-size:1.25rem}.heading-preview.h3{font-size:1.1rem}.heading-preview.h4{font-size:1rem}.heading-preview.h5{font-size:.9rem}.heading-preview.h6{font-size:.85rem}.editor-wrapper{flex:1;overflow:hidden;position:relative}.editor{width:100%;height:100%;padding:var(--spacing-xl);background:var(--bg-primary);color:var(--text-primary);border:none;resize:none;font-family:JetBrains Mono,Fira Code,Consolas,monospace;font-size:.9375rem;line-height:1.7;overflow-y:auto}.editor:focus{outline:none}.preview-wrapper{flex:1;overflow-y:auto;padding:var(--spacing-xl);background:var(--bg-primary)}.markdown-preview{max-width:800px;margin:0 auto;animation:fadeIn var(--transition-base)}.markdown-preview h1,.markdown-preview h2,.markdown-preview h3,.markdown-preview h4,.markdown-preview h5,.markdown-preview h6{margin-top:1.5em;margin-bottom:.5em;font-weight:700;line-height:1.3;color:var(--text-primary)}.markdown-preview h1{font-size:2.5rem;border-bottom:2px solid var(--border-primary);padding-bottom:var(--spacing-md);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.markdown-preview h2{font-size:2rem;border-bottom:1px solid var(--border-secondary);padding-bottom:var(--spacing-sm)}.markdown-preview h3{font-size:1.5rem}.markdown-preview h4{font-size:1.25rem}.markdown-preview p{margin-bottom:1em;color:var(--text-secondary)}.markdown-preview a{color:var(--color-primary);text-decoration:none;border-bottom:1px solid transparent;transition:all var(--transition-base)}.markdown-preview a:hover{color:var(--color-primary-light);border-bottom-color:var(--color-primary-light)}.markdown-preview code{background:var(--bg-tertiary);padding:.2em .4em;border-radius:var(--radius-sm);font-family:JetBrains Mono,Fira Code,Consolas,monospace;font-size:.875em;color:var(--color-secondary);border:1px solid var(--border-primary)}.markdown-preview pre{background:var(--bg-secondary);padding:var(--spacing-lg);border-radius:var(--radius-lg);overflow-x:auto;margin:1em 0;border:1px solid var(--border-primary);box-shadow:var(--shadow-sm)}.markdown-preview pre code{background:transparent;padding:0;border:none;color:var(--text-primary)}.markdown-preview blockquote{border-left:4px solid var(--color-primary);padding-left:var(--spacing-lg);margin:1em 0;color:var(--text-secondary);font-style:italic;background:var(--bg-secondary);padding:var(--spacing-md) var(--spacing-lg);border-radius:0 var(--radius-md) var(--radius-md) 0}.markdown-preview ul,.markdown-preview ol{margin:1em 0;padding-left:2em;color:var(--text-secondary)}.markdown-preview li{margin:.5em 0}.markdown-preview img{max-width:100%;height:auto;border-radius:var(--radius-lg);margin:1em 0;box-shadow:var(--shadow-md)}.markdown-preview table{width:100%;border-collapse:collapse;margin:1em 0;background:var(--bg-secondary);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}.markdown-preview th,.markdown-preview td{padding:var(--spacing-md);text-align:left;border-bottom:1px solid var(--border-primary)}.markdown-preview th{background:var(--bg-tertiary);font-weight:600;color:var(--text-primary)}.markdown-preview tr:last-child td{border-bottom:none}.markdown-preview hr{border:none;border-top:2px solid var(--border-primary);margin:2em 0}.file-list{background:var(--bg-secondary);border-right:1px solid var(--border-primary);width:250px;display:flex;flex-direction:column}.file-list-header{padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--border-primary);display:flex;align-items:center;justify-content:space-between}.file-list-title{font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary)}.file-items{flex:1;overflow-y:auto;padding:var(--spacing-sm)}.file-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);margin-bottom:var(--spacing-xs);border:1px solid transparent}.file-item:hover{background:var(--bg-tertiary);border-color:var(--border-primary)}.file-item.active{background:var(--bg-elevated);border-color:var(--color-primary);box-shadow:var(--shadow-sm)}.file-item-icon{color:var(--color-primary)}.file-item-name{flex:1;font-size:.875rem;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-item-delete{opacity:0;color:var(--text-tertiary);transition:all var(--transition-base);padding:var(--spacing-xs);border-radius:var(--radius-sm)}.file-item:hover .file-item-delete{opacity:1}.file-item-delete:hover{color:var(--color-accent);background:var(--bg-primary)}.file-list.collapsed{width:80px}.file-list.collapsed .file-list-title span{display:none}.btn-icon-sm{display:flex;align-items:center;justify-content:center;padding:var(--spacing-xs);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.btn-icon-sm:hover{background:var(--bg-tertiary);border-color:var(--border-primary);color:var(--text-primary)}.folder-container{margin-bottom:var(--spacing-xs)}.folder-item{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);border:1px solid transparent;position:relative}.folder-item:hover{background:var(--bg-tertiary);border-color:var(--border-primary)}.folder-item:hover .folder-actions{opacity:1}.folder-toggle{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;transition:all var(--transition-base)}.folder-toggle:hover{color:var(--text-primary)}.folder-icon{color:var(--color-secondary);flex-shrink:0}.folder-name{flex:1;font-size:.875rem;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-actions{display:flex;gap:var(--spacing-xs);opacity:0;transition:opacity var(--transition-base)}.folder-action-btn{background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;padding:var(--spacing-xs);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--transition-base)}.folder-action-btn:hover{background:var(--bg-elevated);color:var(--text-primary)}.folder-action-btn:last-child:hover{color:var(--color-accent)}.folder-files{margin-left:var(--spacing-lg);margin-top:var(--spacing-xs);padding-left:var(--spacing-md);border-left:2px solid var(--border-secondary)}.file-item.nested{padding-left:var(--spacing-md)}.folder-empty{padding:var(--spacing-md);font-size:.8125rem;color:var(--text-tertiary);font-style:italic;text-align:center}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl);color:var(--text-tertiary);text-align:center;gap:var(--spacing-md)}.empty-state-icon{font-size:3rem;opacity:.3}.empty-state-text{font-size:.875rem}.modal-overlay{position:fixed;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn var(--transition-base)}.modal{background:var(--bg-secondary);border-radius:var(--radius-xl);padding:var(--spacing-xl);width:90%;max-width:400px;box-shadow:var(--shadow-lg);border:1px solid var(--border-primary);animation:fadeIn var(--transition-base)}.modal-title{font-size:1.25rem;font-weight:600;margin-bottom:var(--spacing-lg);color:var(--text-primary)}.modal-input{width:100%;padding:var(--spacing-md);background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--radius-md);color:var(--text-primary);font-size:.9375rem;transition:all var(--transition-base);margin-bottom:var(--spacing-lg)}.modal-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #8a50ff1a}.modal-actions{display:flex;gap:var(--spacing-sm);justify-content:flex-end}.toast{position:fixed;bottom:var(--spacing-xl);right:var(--spacing-xl);background:var(--bg-secondary);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-lg);z-index:2000;animation:slideInRight var(--transition-base);max-width:400px;display:flex;flex-direction:column;gap:var(--spacing-md)}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.toast-content{display:flex;align-items:flex-start;gap:var(--spacing-md);color:var(--text-primary)}.toast-content svg{flex-shrink:0;margin-top:2px;color:var(--color-primary)}.toast-title{font-weight:600;font-size:.9375rem;margin-bottom:var(--spacing-xs)}.toast-message{font-size:.875rem;color:var(--text-secondary)}.toast-actions{display:flex;gap:var(--spacing-sm);justify-content:flex-end}.btn-sm{padding:var(--spacing-xs) var(--spacing-md);font-size:.8125rem}.toast-close{position:absolute;top:var(--spacing-sm);right:var(--spacing-sm);background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;padding:var(--spacing-xs);border-radius:var(--radius-sm);transition:all var(--transition-base);display:flex;align-items:center;justify-content:center}.toast-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.toast-install{padding-right:var(--spacing-xl)}.toast-update .toast-content svg{color:var(--color-secondary)}@media(max-width:768px){.file-list{position:absolute;left:-250px;height:100%;z-index:50;transition:left var(--transition-base)}.file-list.open{left:0}.main-content{flex-direction:column}.editor-container{border-right:none;border-bottom:1px solid var(--border-primary)}}