styles.css

/**
 * CSS for styling the loading spinner over the remote video stream
 */
 .remote-video-container {
    position: relative;
}
.loading-spinner {
    border: 12px solid #f3f3f3;
    border-radius: 50%;
    border-top: 12px solid #ca5010;
    width: 100px;
    height: 100px;
    -webkit-animation: spin 2s linear infinite; /* Safari */
    animation: spin 2s linear infinite;
    position: absolute;
    margin: auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    transform: translate(-50%, -50%);
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* Safari */
@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}

body {box-sizing: border-box;}
         /* The popup chat - hidden by default */
         .chat-popup {
         display: none;
         position: fixed;
         bottom: 0;
         left: 15px;
         border: 3px solid #f1f1f1;
         z-index: 9;
         }
         .message-box {
         display: none;
         position: fixed;
         bottom: 0;
         left: 15px;
         border: 3px solid #FFFACD;
         z-index: 9;
         }
         .form-container {
         max-width: 300px;
         padding: 10px;
         background-color: white;
         }
         .form-container textarea {
         width: 90%;
         padding: 15px;
         margin: 5px 0 22px 0;
         border: none;
         background: #e1e1e1;
         resize: none;
         min-height: 50px;
         }
         .form-container .btn {
         background-color: #4CAF40;
         color: white;
         padding: 14px 18px;
         margin-bottom:10px;
         opacity: 0.6;
         border: none;
         cursor: pointer;
         width: 100%;
         }
         .container {
         border: 1px solid #dedede;
         background-color: #F1F1F1;
         border-radius: 3px;
         padding: 8px;
         margin: 8px 0;
         }
         .darker {
         border-color: #ccc;
         background-color: #ffdab9;
         margin-left: 25px;
         margin-right: 3px;
         }
         .lighter {
         margin-right: 20px;
         margin-left: 3px;
         }
         .container::after {
         content: "";
         clear: both;
         display: table;
         }