body{font-family:Arial,sans-serif;background-color:#f4f4f4;margin:0;padding:0}.chat-container{margin-top:-9px;background-color:#fff;box-shadow:0 0 10px rgba(0,0,0,.1);border-radius:8px;overflow:hidden;height:250px;overflow-y:scroll}.message{padding:10px;margin:10px;border-radius:8px;clear:both;overflow:hidden}.user-avatar{width:30px;height:30px;border-radius:50%;float:left;margin-right:10px}.user-message{background-color:#e0f7fa}.other-message{background-color:#fff}.sender-message{background-color:#e0f7fa;float:right}.receiver-message{background-color:#e9d1d1;float:left}.message-input{width:calc(100% - 20px);padding:10px;margin:10px;border-radius:8px;border:1px solid #ccc;box-sizing:border-box;resize:none}.send-button{background-color:#4caf50;color:#fff;border:none;padding:10px;border-radius:8px;cursor:pointer}.user-name{font-weight:700;margin-bottom:5px;text-align:center}.timestamp{font-size:12px;float:right;color:#888;margin-top:5px;text-align:right}.three-dots{width:20px;height:20px;background:#ccc;border-radius:50%;cursor:pointer}.options-menu{margin-top:5px;padding:5px;background:#f9f9f9;border:1px solid #ccc;border-radius:4px;position:absolute;z-index:1}.options-menu div{cursor:pointer;padding:5px}@media screen{#printSection{display:none}}@media print{body *{visibility:hidden}#printSection,#printSection *{visibility:visible}#printSection{position:absolute;left:0;top:0}#no-print,#no-print *{display:none!important}}