body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100vh;
}
.user-list-container {
    border-radius: 4px;
    position: absolute;
    top: 25px;
    right: 0;
    width: 150px;
    height: 100px;
    overflow-y: scroll;
    background: rgba(255, 255, 255, 0.6);
    display: none;
}
.user-list-btn {
    margin-left: 8px;
    padding: 10px 16px;
    border: none;
    background: #006064;
    color: white;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    position: absolute;
    top: 0;
    right: 0;
}
.user-list-btn:hover {
    background: #004d40;
}
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin: auto;
    max-width: 800px;
    width: 90%;
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.chat-box {
    flex: 1;
    overflow-y: auto;
    padding: 46px 16px 16px 16px;
    background: #f5f5f5;
}

.message {
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    position: relative;
}

.message-text {
    padding: 10px 14px;
    max-width: 70%;
    word-wrap: break-word;
    font-size: 14px;
    border-radius: 8px;
}

.message-text span {
    font-weight: bold;
    color: #007BFF;
}

.user1 .message-text {
    background: #e0f7fa;
    color: #006064;
    margin-left: auto;
    border-radius: 8px 8px 0 8px;
}

.user2 .message-text {
    background: #ede7f6;
    color: #512da8;
    margin-right: auto;
    border-radius: 8px 8px 8px 0;
}

.message-id {
    font-size: 12px;
    color: #777;
    position: absolute;
    top: -18px; /* ID가 말풍선 위로 위치하도록 조정 */
    padding: 0 2px 0 8px;
    background-color: #fff;
    border-radius: 4px;
}

.user1 .message-id {
    right: 8px; /* 본인 메시지, 오른쪽 상단 */
}

.user2 .message-id {
    left: 8px; /* 타인 메시지, 왼쪽 상단 */
}

.input-area {
    display: flex;
    padding: 16px;
    border-top: 1px solid #ddd;
    background: #fff;
}

.input-area textarea {
    flex: 1;
    resize: none;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    font-size: 14px;
}

.input-area button {
    margin-left: 8px;
    padding: 10px 16px;
    border: none;
    background: #006064;
    color: white;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
}

.input-area button:hover {
    background: #004d40;
}