* { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: "Open Sans", "Helvetica Neue", Arial, sans-serif;
      display: flex;
      flex-direction: column;
      height: 100vh;
      overflow: hidden;
    }

    #header {
      background: linear-gradient(135deg, #3d7ef0, #1a5bb8);
      color: white;
      padding: 6px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    #header-center {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    #header-center h2 {
      margin: .25rem 0 .25rem 0;
      font-size:xx-large;
      /* line-height: 1.5; */
    }

    #header-divider {
      width: 60%;
      border: none;
      border-top: 1px solid rgba(255,255,255,0.3);
      margin: 4px 0 3px;
    }

    #header-info {
      margin: 0;
    }

    .info-btn {
      background: none;
      color: rgba(255,255,255,0.7);
      border: none;
      padding: 0;
      cursor: pointer;
      display: flex;
      align-items: center;
    }

    .info-btn:hover {
      color: rgba(255,255,255,0.4);
      background: none;
      border: none;
    }


    #header-settings {
      margin: 0;
    }

    .settings-btn {
      background: none;
      color: rgba(255,255,255,0.7);
      border: none;
      padding: 0;
      cursor: pointer;
      display: flex;
      align-items: center;
    }

    .settings-btn:hover {
      color: rgba(255,255,255,0.4);
      background: none;
      border: none;
    }


    .header-side {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .header-label {
      font-size: 14px;
      font-weight: 600;
      color: white;
    }

    .leftSidebar-toggle-btn, .rightSidebar-toggle-btn {
      width: 130px;
      height: 30px;
      padding: 0 10px;
      background: rgba(255,255,255,0.2);
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
      line-height: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      flex-shrink: 0;
    }

    .leftSidebar-toggle-btn.sidebar-closed, .rightSidebar-toggle-btn.sidebar-closed {
      background: rgba(255,255,255,0.08);
    }

    .leftSidebar-toggle-btn:hover, .rightSidebar-toggle-btn:hover {
      background: rgba(255,255,255,0.35);
    }

    #main {
      display: flex;
      flex: 1;
      overflow: hidden;
      width: 100%;
    }

    #leftSidebar {
      width: 250px;
      background: #f0f0f0;
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 15px;
      border-right: 1px solid #ccc;
      overflow-y: auto;
      overflow-x: hidden;
      position: relative;
      flex-shrink: 0;
    }

    #leftSidebar.collapsed {
      width: 0;
      min-width: 0;
      padding: 0;
      overflow: hidden;
      transition: width 0.3s, padding 0.3s;
    }

    #resizeHandle {
      position: absolute;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 8px;
      height: 60px;
      background: transparent;
      cursor: ew-resize;
      border-radius: 4px;
      z-index: 10;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
    }

    #resizeHandle::before,
    #resizeHandle::after {
      content: '';
      width: 2px;
      height: 20px;
      background: #999;
      border-radius: 1px;
    }

    #resizeHandle:hover::before,
    #resizeHandle:hover::after {
      background: #276CE5;
    }

    #rightSidebar {
      width: 250px;
      background: #f0f0f0;
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 15px;
      border-left: 1px solid #ccc;
      overflow-y: auto;
      overflow-x: hidden;
      position: relative;
      flex-shrink: 0;
      direction: rtl;
    }

    #rightSidebar > * {
      direction: ltr;
    }

    #leftSidebar::-webkit-scrollbar,
    #rightSidebar::-webkit-scrollbar {
      width: 4px;
    }

    #leftSidebar::-webkit-scrollbar-track,
    #rightSidebar::-webkit-scrollbar-track {
      background: transparent;
    }

    #leftSidebar::-webkit-scrollbar-thumb,
    #rightSidebar::-webkit-scrollbar-thumb {
      background: #7aa3d4;
      border-radius: 4px;
    }

    #leftSidebar::-webkit-scrollbar-thumb:hover,
    #rightSidebar::-webkit-scrollbar-thumb:hover {
      background: #276CE5;
    }

    #leftSidebar {
      scrollbar-width: thin;
      scrollbar-color: #7aa3d4 transparent;
    }

    #rightSidebar {
      scrollbar-width: thin;
      scrollbar-color: #7aa3d4 transparent;
    }

    #rightSidebar.collapsed {
      width: 0;
      min-width: 0;
      padding: 0;
      overflow: hidden;
      transition: width 0.3s, padding 0.3s;
    }

    #rightResizeHandle {
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 8px;
      height: 60px;
      background: transparent;
      cursor: ew-resize;
      border-radius: 4px;
      z-index: 10;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
    }

    #rightResizeHandle::before,
    #rightResizeHandle::after {
      content: '';
      width: 2px;
      height: 20px;
      background: #999;
      border-radius: 1px;
    }

    #rightResizeHandle:hover::before,
    #rightResizeHandle:hover::after {
      background: #276CE5;
    }

    #collapseBtn {
      display: none;
    }

    #content {
      flex: 1;
      overflow: hidden;
      padding: 20px;
      background: white;
      background-size: 300px auto;
      min-width: 0;
    }

    iframe {
      width: 100%;
      min-width: 800px;
      height: 100%;
      border: none;
    }

    button {
      padding: 12px 20px;
      cursor: pointer;
      border: 1px solid #ccc;
      background: white;
      border-radius: 4px;
      font-size: 14px;
      transition: all 0.2s;
      white-space: nowrap;
    }

    .nav-buttons {
      display: flex;
      gap: 10px;
    }

    .nav-buttons button {
      flex: 1;
      padding: 8px 4px;
      white-space: nowrap;
    }

    button:hover {
      background: #f5f5f5;
      border-color: #276CE5;
    }

    button:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }


    .createBucket-btn {
      background: linear-gradient(135deg, #2d9e2d, #1a6b1a);
      color: white;
      font-weight: 600;
      border: none;
    }

    .createBucket-btn:hover {
      background: linear-gradient(135deg, #258025, #145214);
    }

    .deleteBucket-btn {
      background: linear-gradient(135deg, #e53535, #a01010);
      color: white;
      font-weight: 600;
      border: none;
    }

    .deleteBucket-btn:hover {
      background: linear-gradient(135deg, #c82020, #800a0a);
    }


    .moveFile-btn {
      background: linear-gradient(135deg, #999, #606060);
      color: white;
      font-weight: 600;
      border: none;
    }

    .moveFile-btn:hover {
      background: linear-gradient(135deg, #808080, #484848);
    }

    .moveFile-btn:active {
      background: linear-gradient(135deg, #686868, #303030);
    }

    .copyFile-btn {
      background: linear-gradient(135deg, #444, #111);
      color: white;
      font-weight: 600;
      border: none;
    }

    .copyFile-btn:hover {
      background: linear-gradient(135deg, #333, #000);
    }

    .copyFile-btn:active {
      background: linear-gradient(135deg, #222, #000);
    }

    .createFile-btn {
      background: linear-gradient(135deg, #2d9e2d, #1a6b1a);
      color: white;
      font-weight: 600;
      border: none;
    }

    .createFile-btn:hover {
      background: linear-gradient(135deg, #258025, #145214);
    }

    .importFile-btn {
      background: linear-gradient(135deg, #f0a060, #c87030);
      color: white;
      font-weight: 600;
      border: none;
    }

    .importFile-btn:hover {
      background: linear-gradient(135deg, #dc8c50, #b06020);
    }

    .importFile-btn:active {
      background: linear-gradient(135deg, #c87840, #985010);
    }


    .saveFile-btn {
      background: linear-gradient(135deg, #3d7ef0, #1a5bb8);
      color: white;
      font-weight: 600;
      border: none;
    }

    .saveFile-btn:hover {
      background: linear-gradient(135deg, #2a6ad8, #1248a0);
    }

    .deleteFile-btn {
      background: linear-gradient(135deg, #e53535, #a01010);
      color: white;
      font-weight: 600;
      border: none;
    }

    .deleteFile-btn:hover {
      background: linear-gradient(135deg, #c82020, #800a0a);
    }

    .submitFile-btn {
      background: linear-gradient(135deg, #f953c6, #b91d73);
      color: white;
      font-weight: 600;
      border: none;
    }

    .submitFile-btn:hover {
      background: linear-gradient(135deg, #e040b0, #a01060);
    }

    #fileInfo {
      padding: 8px;
      background: white;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 14px;
      width: 100%;
    }

    #fileCount {
      text-align: center;
      padding: 1px;
      border-radius: 4px;
      font-size: 13px;
      color: #666;
      white-space: nowrap;
    }

    #fileMove {
      text-align: center;
      padding: 1px;
      /* background: white; */
      border-radius: 4px;
      font-size: 13px;
      color: #666;
    }

    .section-title {
      font-size: 12px;
      font-weight: 600;
      color: #666;
      text-transform: uppercase;
      margin-top: 10px;
      white-space: nowrap;
      text-align: center;
    }

    select {
      padding: 8px;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 14px;
    }

    /* Modal styles */
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5);
      overflow-y: auto;
    }

    .modal-content {
      background-color: white;
      margin: 5% auto;
      padding: 30px;
      border-radius: 8px;
      width: 400px;
      text-align: center;
      max-height: 85vh;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
    }

    .modal-content p {
      margin-bottom: 20px;
      font-size: 16px;
      color: #333;
    }

    .modal-buttons {
      display: flex;
      gap: 10px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .modal-buttons button {
      flex: 1;
      min-width: 120px;
    }

    .delete-btn {
      background: linear-gradient(135deg, #e53535, #a01010);
      color: white;
      font-weight: 600;
      border: none;
    }

    .delete-btn:hover {
      background: linear-gradient(135deg, #c82020, #800a0a);
    }

    .cancel-btn {
      background: linear-gradient(135deg, #3d7ef0, #1a5bb8);
      color: white;
      font-weight: 600;
      border: none;
    }

    .cancel-btn:hover {
      background: linear-gradient(135deg, #2a6ad8, #1248a0);
    }

    .save-btn {
      background: linear-gradient(135deg, #2d9e2d, #1a6b1a);
      color: white;
      font-weight: 600;
      border: none;
    }

    .save-btn:hover {
      background: linear-gradient(135deg, #258025, #145214);
    }

    .submit-btn {
      background: linear-gradient(135deg, #f953c6, #b91d73);
      color: white;
      font-weight: 600;
      border: none;
    }

    .submit-btn:hover {
      background: linear-gradient(135deg, #e040b0, #a01060);
    }

    .modal-input {
      width: 100%;
      padding: 10px;
      margin-bottom: 20px;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 14px;
    }

    .file-upload-area {
      border: 2px dashed #ccc;
      border-radius: 8px;
      padding: 40px;
      text-align: center;
      margin-bottom: 20px;
      cursor: pointer;
      transition: all 0.3s;
    }

    .file-upload-area:hover {
      border-color: #276CE5;
      background: #f5f5f5;
    }

    .file-upload-area.drag-over {
      border-color: #276CE5;
      background: #e3f2fd;
    }

    @keyframes blink {
      50% { opacity: 0; }
    }

    .create-btn {
      background: linear-gradient(135deg, #2d9e2d, #1a6b1a);
      color: white;
      font-weight: 600;
      border: none;
    }

    .create-btn:hover {
      background: linear-gradient(135deg, #258025, #145214);
    }

    .create-btn:disabled {
      background: #ccc;
      cursor: not-allowed;
    }

    .directImport-btn {
      background: linear-gradient(135deg, #f0a060, #c87030);
      color: white;
      font-weight: 600;
      border: none;
    }

    .directImport-btn:hover {
      background: linear-gradient(135deg, #dc8c50, #b06020);
    }