:root{--primary: #1b78e2;--primary-light: #e8f0fe;--danger: #ea4335;--warning: #fbbc04;--success: #34a853;--text-primary: #202124;--text-secondary: #5f6368;--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--border: #e0e0e0;--shadow: 0 2px 8px rgba(0, 0, 0, .1);--radius: 12px;--header-height: 56px;--nav-height: 64px;--safe-bottom: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;width:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-secondary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.mobile-app{display:flex;flex-direction:column;height:100%;background:var(--bg-secondary)}.mobile-header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--bg-primary);display:flex;align-items:center;padding:0 16px;z-index:100;box-shadow:var(--shadow)}.header-logo{display:flex;align-items:center;gap:10px}.logo-icon{width:28px;height:28px}.logo-text{font-size:18px;font-weight:600;color:var(--text-primary)}.mobile-content{flex:1;margin-top:var(--header-height);margin-bottom:calc(var(--nav-height) + var(--safe-bottom));overflow-y:auto;-webkit-overflow-scrolling:touch}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--nav-height) + var(--safe-bottom));padding-bottom:var(--safe-bottom);background:var(--bg-primary);display:flex;justify-content:space-around;align-items:center;border-top:1px solid var(--border);z-index:100}.bottom-nav .nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 12px;color:var(--text-secondary);text-decoration:none;font-size:11px;transition:color .2s;min-width:48px}.bottom-nav .nav-item.active{color:var(--primary)}.bottom-nav .nav-item svg{transition:transform .2s}.bottom-nav .nav-item.active svg{transform:scale(1.1)}.page{padding:16px}.page-title{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:600;margin-bottom:16px;color:var(--text-primary)}.page-title .badge{background:var(--primary);color:#fff;font-size:12px;padding:2px 8px;border-radius:10px;font-weight:500}.breadcrumb{display:flex;align-items:center;gap:4px;padding:12px 16px;background:var(--bg-primary);border-bottom:1px solid var(--border);overflow-x:auto;white-space:nowrap}.breadcrumb-item{background:none;border:none;padding:6px 10px;font-size:14px;color:var(--text-secondary);cursor:pointer;border-radius:6px}.breadcrumb-item.active{color:var(--text-primary);font-weight:500}.breadcrumb-segment{display:flex;align-items:center;color:var(--text-secondary)}.refresh-btn{margin-left:auto;background:none;border:none;padding:8px;color:var(--text-secondary);cursor:pointer}.refresh-btn .spinning{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.file-list{padding:8px 16px}.file-card{display:flex;align-items:center;gap:14px;padding:14px;background:var(--bg-primary);border-radius:var(--radius);margin-bottom:8px;box-shadow:0 1px 3px #0000000a;cursor:pointer;transition:background .15s;-webkit-user-select:none;user-select:none}.file-card:active{background:var(--bg-secondary)}.file-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.file-icon.folder{background:#e8f0fe;color:#1a73e8}.file-icon.image{background:#fce8e6;color:#ea4335}.file-icon.video{background:#e6f4ea;color:#34a853}.file-icon.audio{background:#fef7e0;color:#f9ab00}.file-icon.archive{background:#f3e8fd;color:#9334e6}.file-icon.document{background:#e8f0fe;color:#1a73e8}.file-icon.file{background:#f1f3f4;color:#5f6368}.file-icon .thumbnail{width:100%;height:100%;object-fit:cover;border-radius:10px}.file-info{flex:1;min-width:0}.file-name{display:block;font-size:15px;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-meta{display:block;font-size:12px;color:var(--text-secondary);margin-top:2px}.action-sheet-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:200;animation:fadeIn .2s}.action-sheet{position:fixed;bottom:0;left:0;right:0;background:var(--bg-primary);border-radius:16px 16px 0 0;z-index:201;padding-bottom:var(--safe-bottom);animation:slideUp .25s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.action-sheet-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.action-sheet-title{font-size:16px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:80%}.action-sheet-close{background:none;border:none;padding:8px;color:var(--text-secondary);cursor:pointer}.action-sheet-content{padding:8px 0}.action-sheet-item{display:flex;align-items:center;gap:16px;width:100%;padding:16px 20px;background:none;border:none;font-size:16px;color:var(--text-primary);cursor:pointer;text-align:left}.action-sheet-item:active{background:var(--bg-secondary)}.action-sheet-cancel{width:100%;padding:16px;background:var(--bg-secondary);border:none;font-size:16px;font-weight:600;color:var(--primary);cursor:pointer}.loading{display:flex;justify-content:center;align-items:center;padding:60px 20px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-secondary);text-align:center}.empty-state svg{margin-bottom:16px;opacity:.5}.share-list{padding:0 16px}.share-item{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--bg-primary);border-radius:var(--radius);margin-bottom:8px}.share-info{display:flex;align-items:center;gap:10px;min-width:0}.share-name{font-size:15px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.share-type{font-size:10px;padding:2px 6px;border-radius:4px;font-weight:500}.share-type.browse{background:var(--primary-light);color:var(--primary)}.share-type.download{background:#fce8e6;color:var(--danger)}.share-actions{display:flex;gap:4px}.action-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:none;border:none;border-radius:50%;color:var(--text-secondary);cursor:pointer}.action-btn:active{background:var(--bg-secondary)}.action-btn.delete{color:var(--danger)}.settings-section{margin-bottom:16px}.settings-card{display:flex;align-items:center;gap:16px;padding:16px;background:var(--bg-primary);border-radius:var(--radius)}.settings-icon{width:44px;height:44px;background:var(--primary-light);color:var(--primary);border-radius:10px;display:flex;align-items:center;justify-content:center}.settings-info{flex:1}.settings-label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:2px}.settings-value{display:block;font-size:15px;font-weight:500;color:var(--text-primary)}.storage-bar{height:6px;background:var(--border);border-radius:3px;margin-top:8px;overflow:hidden}.storage-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .3s}.logout-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:16px;background:#fce8e6;color:var(--danger);border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer}.login-page{display:flex;flex-direction:column;justify-content:center;min-height:100vh;padding:30px;background:var(--bg-primary)}.login-header{text-align:center;margin-bottom:40px}.login-logo{width:64px;height:64px;margin-bottom:20px}.login-header h1{font-size:24px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.login-header p{color:var(--text-secondary);font-size:14px}.login-form{width:100%;max-width:400px;margin:0 auto}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:8px}.form-group input{width:100%;padding:12px 16px;font-size:16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-secondary);transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary);background:var(--bg-primary)}.login-btn{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;margin-top:10px}.login-btn:disabled{opacity:.7;cursor:not-allowed}.error-message{background:#fce8e6;color:var(--danger);padding:12px;border-radius:var(--radius);font-size:14px;margin-bottom:20px;text-align:center}.spinner-small{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1100;padding:20px;animation:fadeIn .2s ease-out}.modal{background:var(--bg-primary);border-radius:20px;width:100%;max-width:320px;box-shadow:0 10px 40px #0003;animation:slideUp .2s ease-out;overflow:hidden;border:1px solid rgba(255,255,255,.1)}.modal-header{padding:20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.modal-header h3{margin:0;font-size:18px;font-weight:600}.modal-close{background:none;border:none;padding:4px;cursor:pointer;color:var(--text-secondary)}.modal-content{padding:24px}.modal-footer{padding:16px 24px;background:var(--bg-secondary);display:flex;justify-content:flex-end;gap:12px}.modal-input{width:100%;padding:14px;border:1px solid var(--border);border-radius:12px;font-size:16px;outline:none;transition:all .2s}.modal-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #1a73e81a}.modal-actions{display:flex;gap:12px;width:100%}.modal-actions button{flex:1;padding:14px;border-radius:12px;font-weight:600;cursor:pointer;border:none;font-size:15px}.btn-secondary{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border)!important}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 2px 8px #1a73e84d}.btn-danger{background:#ffebeb;color:#d93025}.modal-text{color:var(--text-secondary);line-height:1.6;margin:0}.fab-container{position:fixed;bottom:90px;right:20px;z-index:1000;display:flex;flex-direction:column;align-items:flex-end;gap:12px;pointer-events:none}.fab-container>*{pointer-events:auto}.fab-main{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#1557b0);color:#fff;box-shadow:0 6px 16px #1a73e866;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.fab-main:hover{transform:scale(1.05);box-shadow:0 8px 20px #1a73e880}.fab-main:active{transform:scale(.95);box-shadow:0 4px 10px #1a73e84d}.fab-menu{display:flex;flex-direction:column;align-items:flex-end;gap:12px;margin-bottom:5px}.fab-item{display:flex;align-items:center;gap:12px;animation:slideUpFade .2s ease-out backwards}.fab-label{background:var(--bg-primary);padding:6px 12px;border-radius:6px;font-size:14px;font-weight:500;box-shadow:0 2px 8px #0000001a;color:var(--text-primary)}.fab-button{width:48px;height:48px;border-radius:50%;background:var(--bg-secondary);color:var(--text-primary);border:none;box-shadow:0 3px 10px #00000026;display:flex;align-items:center;justify-content:center;cursor:pointer}.fab-button.upload{color:#1a73e8}.fab-button.folder{color:#5f6368}@keyframes slideUpFade{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fab-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#fffc;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:999;animation:fadeIn .2s}.upload-toast{position:fixed;bottom:90px;left:20px;right:20px;background:var(--text-primary);color:var(--bg-primary);padding:12px 16px;border-radius:8px;display:flex;align-items:center;gap:12px;box-shadow:0 4px 12px #0003;z-index:2000;font-size:14px;animation:slideUp .3s cubic-bezier(.175,.885,.32,1.275)}.upload-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite}.preview-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000;z-index:2050;display:flex;flex-direction:column}.preview-header{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;color:#fff;background:linear-gradient(to bottom,rgba(0,0,0,.6),transparent);position:absolute;top:0;width:100%;z-index:10}.preview-title{font-size:16px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0 16px;flex:1;text-align:center}.preview-close,.preview-action{background:none;border:none;color:#fff;padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center}.preview-content{flex:1;display:flex;align-items:center;justify-content:center;position:relative;width:100%;height:100%}.preview-image{max-width:100%;max-height:100%;object-fit:contain}.preview-video{width:100%;max-height:100%}.preview-audio{width:80%}.audio-preview{display:flex;flex-direction:column;align-items:center;gap:20px;width:100%}.audio-icon{font-size:64px;background:#ffffff1a;width:120px;height:120px;display:flex;align-items:center;justify-content:center;border-radius:20px}.preview-unsupported{color:#fff;text-align:center;display:flex;flex-direction:column;gap:20px}.spinner-white{width:40px;height:40px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite}.error-text{color:#ea4335}.picker-empty{text-align:center;color:#999}.folder-picker{display:flex;flex-direction:column;height:300px}.picker-header{display:flex;align-items:center;padding-bottom:12px;border-bottom:1px solid #eee;margin-bottom:8px;gap:12px}.picker-up{display:flex;align-items:center;gap:6px;background:#f0f0f0;border:none;padding:6px 12px;border-radius:6px;font-size:14px;color:#333}.picker-path{font-weight:500;color:#666;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.picker-list{flex:1;overflow-y:auto;display:flex;flex-direction:column}.picker-item{display:flex;align-items:center;padding:12px 8px;border-bottom:1px solid #f9f9f9;cursor:pointer}.picker-item:active{background:#f5f5f5}.picker-icon{color:#fbc02d;margin-right:12px}.picker-name{flex:1;font-size:16px;color:#333}.picker-arrow{color:#ccc}.picker-spinner{width:24px;height:24px;border:2px solid #ddd;border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:20px auto}.picker-empty{text-align:center;color:#999;margin-top:40px}.selection-bar{position:fixed;top:0;left:0;right:0;height:60px;background:var(--primary);color:#fff;z-index:3000;display:flex;align-items:center;padding:0 16px;box-shadow:0 4px 12px #0003;animation:slideDown .2s ease-out}@keyframes slideDown{0%{transform:translateY(-100%)}to{transform:translateY(0)}}.selection-count{flex:1;font-size:18px;font-weight:500;margin-left:16px}.selection-bar .icon-btn{background:none;border:none;color:#fff;padding:8px;border-radius:50%}.selection-bar .icon-btn:active{background:#fff3}.file-card.selected{background-color:#1b78e21a;border:1px solid var(--primary)}.selection-checkbox{position:absolute;top:8px;right:8px;width:24px;height:24px;border:2px solid #ccc;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;z-index:5;transition:all .2s}.selection-checkbox.checked{border-color:var(--primary);background:var(--primary)}.checkbox-inner{width:10px;height:6px;border-left:2px solid white;border-bottom:2px solid white;transform:rotate(-45deg);margin-top:-2px}.files-list{display:flex;flex-direction:column;gap:8px;padding-bottom:100px}.file-card.list{display:flex;flex-direction:row;align-items:center;justify-content:space-between;width:100%;height:auto;min-height:60px;padding:12px;aspect-ratio:auto}.file-card.list .file-info{order:1;flex:1;text-align:left;padding:0;margin-right:12px}.file-card.list .file-name{font-size:15px;margin-bottom:4px}.file-card.list .file-icon{order:2;width:40px;height:40px;flex-shrink:0;margin-bottom:0}.file-card.list .file-icon svg,.file-card.list .file-icon img{width:100%;height:100%;object-fit:cover}.file-card.list .selection-checkbox{top:50%;left:10px;transform:translateY(-50%);position:absolute;z-index:10}.file-card.list.selected{border-color:var(--primary);background:#1a73e80d}.file-card.list.selection-mode{padding-left:40px}.public-share{flex-direction:column;padding:24px;text-align:center}.center-content{display:flex;align-items:center;justify-content:center;height:100vh;flex-direction:column}.share-card{background:#fff;padding:32px;border-radius:16px;box-shadow:0 4px 20px #00000014;width:100%;max-width:320px;display:flex;flex-direction:column;align-items:center}.share-icon{width:80px;height:80px;background:#e8f0fe;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.share-title{font-size:18px;font-weight:500;margin-bottom:8px;color:#202124;word-break:break-all}.share-meta{font-size:14px;color:#5f6368;margin-bottom:24px}.share-btn{width:100%;justify-content:center}.error-text{color:#ea4335;margin-top:8px;font-weight:500}.public-folder{padding-bottom:20px}.header-simple{height:60px;display:flex;align-items:center;padding:0 16px;background:#fff;border-bottom:1px solid #f1f3f4;position:sticky;top:0;z-index:10;justify-content:space-between}.header-title{font-size:18px;font-weight:500;color:#202124;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}