*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0a0a0a;--bg-secondary: #141414;--bg-tertiary: #1a1a1a;--text: #ffffff;--text-secondary: #888888;--accent: #FF6B35;--accent-hover: #ff8255;--border: #2a2a2a;--success: #22c55e;--error: #ef4444;--radius: 12px;--radius-sm: 8px}html,body{height:100%}body{font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}#root{min-height:100%;display:flex;flex-direction:column}.app{min-height:100vh;display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:100;padding:24px;text-align:center;background:var(--bg)}.logo{font-family:Space Mono,monospace;font-size:28px;font-weight:700;color:var(--text);text-decoration:none;letter-spacing:-1px}.logo-dot{color:var(--accent);animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.main{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}.footer{padding:24px;text-align:center;color:var(--text-secondary);font-size:14px}.dropzone{width:100%;max-width:500px;min-height:280px;border:2px dashed var(--border);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;background:var(--bg-secondary)}.dropzone:hover{border-color:var(--accent);background:var(--bg-tertiary)}.dropzone.drag-active{border-color:var(--accent);background:var(--bg-tertiary);transform:scale(1.02)}.dropzone.has-files{min-height:80px;border-style:solid}.dropzone-icon{width:64px;height:64px;color:var(--text-secondary);margin-bottom:16px}.dropzone-icon svg{width:100%;height:100%}.dropzone-text{font-size:18px;font-weight:500;margin-bottom:8px}.dropzone-subtext{color:var(--text-secondary);font-size:14px}.dropzone-add-more{color:var(--accent);font-weight:500}.file-tree{width:100%;max-width:500px;margin:24px 0;background:var(--bg-secondary);border-radius:var(--radius);padding:8px;max-height:400px;overflow-y:auto}.tree-folder{margin-bottom:2px}.tree-folder-header{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s ease}.tree-folder-header:hover{background:var(--bg-tertiary)}.tree-chevron{width:16px;height:16px;color:var(--text-secondary);transition:transform .2s ease;flex-shrink:0}.tree-chevron svg{width:100%;height:100%}.tree-chevron.collapsed{transform:rotate(-90deg)}.tree-folder-icon{width:18px;height:18px;color:var(--accent);flex-shrink:0}.tree-folder-icon svg{width:100%;height:100%}.tree-folder-name{font-weight:500;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tree-folder-meta{color:var(--text-secondary);font-size:12px;white-space:nowrap}.tree-folder-content{padding-left:24px;border-left:1px solid var(--border);margin-left:19px}.tree-file{display:flex;align-items:center;gap:8px;padding:6px 12px;border-radius:var(--radius-sm);transition:background .15s ease}.tree-file:hover{background:var(--bg-tertiary)}.tree-file-icon{width:16px;height:16px;color:var(--text-secondary);flex-shrink:0;margin-left:24px}.tree-file-icon svg{width:100%;height:100%}.tree-file-name{flex:1;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tree-file-size{color:var(--text-secondary);font-size:12px;white-space:nowrap}.tree-file-remove{width:24px;height:24px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:4px;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .15s ease;flex-shrink:0}.tree-file:hover .tree-file-remove{opacity:1}.tree-file-remove:hover{background:var(--bg);color:var(--error)}.tree-file-remove svg{width:14px;height:14px}.tree-file-download{width:28px;height:28px;border:none;background:var(--bg-tertiary);color:var(--text);cursor:pointer;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:all .15s ease;flex-shrink:0}.tree-file-download:hover{background:var(--accent)}.tree-file-download svg{width:14px;height:14px}.file-list{list-style:none;width:100%;max-width:500px;margin:24px 0}.file-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-secondary);border-radius:var(--radius-sm);margin-bottom:8px}.file-item-download{justify-content:space-between}.file-item-folder{cursor:pointer;transition:background .15s ease}.file-item-folder:hover{background:var(--bg-tertiary)}.folder-group{list-style:none}.folder-chevron{width:20px;height:20px;color:var(--text-secondary);transition:transform .2s ease;flex-shrink:0}.folder-chevron svg{width:100%;height:100%}.folder-chevron.expanded{transform:rotate(90deg)}.folder-icon{width:20px;height:20px;color:var(--accent);flex-shrink:0}.folder-icon svg{width:100%;height:100%}.folder-contents{list-style:none;padding:0;margin:0}.file-item-nested{margin-left:32px;border-left:2px solid var(--border);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.file-info{flex:1;display:flex;align-items:center;gap:12px;min-width:0}.file-name{flex:1;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-size{color:var(--text-secondary);font-size:14px;white-space:nowrap}.file-remove{width:32px;height:32px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all .2s ease}.file-remove:hover{background:var(--bg-tertiary);color:var(--error)}.file-remove svg{width:18px;height:18px}.btn-primary{width:100%;max-width:500px;padding:16px 32px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{padding:12px 24px;background:var(--bg-secondary);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease;text-decoration:none;display:inline-block}.btn-secondary:hover{background:var(--bg-tertiary);border-color:var(--text-secondary)}.btn-download-single{width:40px;height:40px;border:none;background:var(--bg-tertiary);color:var(--text);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0}.btn-download-single:hover{background:var(--accent)}.btn-download-single svg{width:20px;height:20px}.upload-page{width:100%;max-width:500px;display:flex;flex-direction:column;align-items:center}.uploading{width:100%;max-width:500px;text-align:center}.upload-progress-container{width:100%;height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden;margin-bottom:16px}.upload-progress-bar{height:100%;background:var(--accent);border-radius:4px;transition:width .3s ease}.upload-progress-text{color:var(--text-secondary)}.upload-success{width:100%;max-width:500px;text-align:center}.success-icon{width:80px;height:80px;background:var(--success);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px;animation:scaleIn .3s ease}@keyframes scaleIn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}.success-icon svg{width:40px;height:40px;color:#fff}.upload-success h2{font-size:24px;margin-bottom:8px}.success-subtitle{color:var(--text-secondary);margin-bottom:32px}.share-link-container{display:flex;gap:8px;margin-bottom:24px}.share-link-input{flex:1;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;outline:none}.share-link-input:focus{border-color:var(--accent)}.copy-btn{padding:12px 20px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.copy-btn:hover{background:var(--accent-hover)}.download-page{width:100%;max-width:500px}.download-header{text-align:center;margin-bottom:32px}.download-header h2{font-size:24px;margin-bottom:8px}.download-meta{color:var(--text-secondary)}.error-message{color:var(--error);font-size:14px;margin-bottom:16px;text-align:center}.error-state{text-align:center}.error-icon{width:80px;height:80px;color:var(--error);margin:0 auto 24px}.error-icon svg{width:100%;height:100%}.error-state h2{font-size:24px;margin-bottom:8px}.error-state p{color:var(--text-secondary);margin-bottom:24px}.loading{text-align:center}.loading-spinner{width:40px;height:40px;border:3px solid var(--bg-secondary);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.loading p{color:var(--text-secondary)}@media(max-width:600px){.header,.main{padding:16px}.dropzone{min-height:220px}.share-link-container{flex-direction:column}.file-item{padding:10px 12px}.file-name{font-size:14px}}