@media (max-width: 640px) {
  .chat-panel {
    width: 100%;
  }
  .chat-panel-min {
    height: 48px;
  }
  .chat-panel-head {
    padding: 16px;
  }
  .chat-panel-list {
    padding-top: 48px;
    padding-bottom: 48px;
  }
  .chat-panel-user .pull-left {
    width: calc(100% - 63px);
  }
  .chat-panel-search {
    width: calc(100% - 48px);
  }
  .chat-panel-search input {
    width: 100%;
    height: 48px;
		z-index: 1;
  }
  .chat-panel-search .icon {
    top: 35%;
  }
	.chat-panel-settings {
		width: 48px;
		height: 48px;
		left: 0;
	}
	.chat-panel-settings .button {
		padding: 14px;
	}
	.chat-panel-settings .dropdown-button-control.dropdown-up .dropdown {
		bottom: 40px !important;
	}
  .chat-box {
    width: 100%;
    height: 100%;
    right: 0;
    z-index: 999;
  }
  .chat-box-head {
    height: 48px;
    line-height: 48px;
    font-size: 1.25em;
  }
  .chat-box-messages {
    width: 100%;
    top: 48px;
    bottom: 48px;
  }
  .chat-box-input textarea {
    width: 100%;
    font-size: 1.4em;
  }
  .chat-box-load {
    font-size: 1.1em;
    padding: 7px;
    background: #eee;
  }
  .chat-box-close {
    font-size: 1.25em;
    padding: 0 10px;
    margin-right: 0;
  }
}