body {
      margin: 0;
      padding: 0;
      font-family: Arial, sans-serif;
      background-color: #f0f0f0;
    }

    .header {
      text-align: center;
      padding: 20px;
      background-color: #3498db;
      color: #ffffff;
    }

    .app {
      position: relative;
      padding: 20px;
    }

    .message-container {
      position: relative;
    }

    .message-container textarea {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      background-color: #ffffff;
    }

    .message-input {
      background-color: transparent;
      width: 100%;
      height: 175px;
      /*border: 1px solid #ccc;*/
    }
    

    .message-box {
      position: relative;
      width: calc(33% + 100px);
      height: auto;
      padding: calc(4% + 20px);
      border-radius: 5px;
      font-size: 24pt;
      margin: 0 0 20px 20px;
      white-space: pre;
      white-space: pre-line;
      
    }

    @media (orientation: portrait) {
        .message-box {
            margin-bottom: 100px;
        }
    }

    /* Styles pour le mode paysage */
    @media (orientation: landscape) {
        .message-box {
            margin-bottom: 80px;
        }
    }
    .message-box.sent {
      width: calc(88% - 50px);
      background-color: #d3d3d3;/*#20efbb; */
      left: 0%;
    }

    .message-box.received {
      width: 85%;
      background-color: #fff;/*#3498db;*/
      
    }
    .message-box.received a {
        color: #2A58E2;
        font-size: 18pt;
    }

    #message-input {
      position: fixed;
      bottom: 10px;
      left: calc(10% + 40px);
      background-color: transparent;
      border: solid #000;
      opacity: 85%;
      width: calc(70% - 40px);
      height: calc(3% + 35px);
      border-radius: 30px;
      font-size: 32pt;
      z-index: 9;
    }

    #message-input:hover {
        color: #000;
        background: #d3d3d3;
        border: solid #3498db;
    }

    #send-button:hover {
        color: #fff;
        background: #20efbb;
    }

    #send-button {
      position: fixed;
      bottom: 12px;
      left: 84%;
      background-color: transparent;
      border: solid #20efbb;
      width: 150px;
      height: calc(3% + 50px);
      border-radius: 20px;
      font-size: 24pt;
      z-index: 9;
    }
    
      
    #upload-files {
      position: fixed;
      bottom: 0px;
      left: 1%;
      background-color: transparent;
      border: solid #20efbb;
      width: 100px;
      height: calc(3% + 50px);
      border-radius: 20px;
      font-size: 18pt;
      z-index: 9;
      overflow: hidden;
    }

    #custom-upload {
      display: inline-block;
      background: transparent;
      cursor: pointer;
      position: fixed;
      bottom: 12px;
      left: calc(4% - 10px);
      background-color: transparent;
      width: calc(100px);
      /*height: calc(3% + 50px);*/
      border-radius: 20px;
      font-size: 18pt;
      z-index: 4;
      overflow: hidden;
    }
    #upload-files {
      display: none;
    }
    
    #upload-files:hover {
        color: #fff;
        background: #20efbb;
    }

    #user-id-input {
      position: fixed;
      top: 80px;
      left: calc(10% + 40px);
      background-color: transparent;
      border: solid #000;
      opacity: 5%;
      width: calc(70% - 40px);
      height: 50px;
      border-radius: 30px;
      font-size: 24pt;
      z-index: 9;
      display: block;
    }

    #user-id-input:hover {
      color: #000;
      opacity: 80%;
      background: #d3d3d3;
    border: solid #3498db;
  }









    #menu-button {
      position: fixed;
      left: 0;
      top: 0;
      width: 50px;
      height: 100%;
      background-color: #3498db;
      color: #ffffff;
      text-align: center;
      line-height: 50px;
      cursor: pointer;
      z-index: 9999;
    }

    #menu {
      position: fixed;
      left: -150px;
      top: 0px;
      width: 150px;
      height: 100%;
      background-color: #ffffff;
      box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
      transition: left 0.3s ease-in-out;
      overflow-y: auto;
      padding-top: 45px;
	    padding-left: 20px;
	    padding-right: 20px;
      z-index: 9997;
    }

    .menu-item {
      margin-bottom: 10px;
      z-index: 9999;
      cursor: pointer;
    }

    .menu-item a {
        color: #0d66e3;
    }

    #add-button {
      cursor: pointer;
      z-index: 9999;
    }

    #input-container {
      display: none;
      margin-top: 10px;
      z-index: 9998;
    }
	
	 #toggle-menu-button {
      position: fixed;
      left: 5px;
      top: 10px;
      width: 30px;
      height: 30px;
      background-color: #3498db;
      color: #ffffff;
      text-align: center;
      line-height: 30px;
      cursor: pointer;
      z-index: 9999;
      font-size: 14pt;
      border: none;
    }

    #add-button {
      position: fixed;
      left: 50px;
      bottom: 20px;
      transform: translateX(-50%);
      width: 40px;
      height: 40px;
      background-color: #3498db;
      color: #ffffff;
      text-align: center;
      line-height: 40px;
      font-size: 20px;
      cursor: pointer;
      border-radius: 50%;
      z-index: 9999;