/* --- Private Chat Monitor Overlay Styles --- */
.private-chat-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3); /* 半透明遮罩 */
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: none; /* 默认隐藏 */
    flex-direction: column;
    align-items: center;
    justify-content: flex-start; /* 从顶部开始 */
    padding-top: 60px; /* 留出顶部空间 */
    animation: slideDown 0.3s ease-out;
}

.private-chat-overlay.visible {
    display: flex;
}

@keyframes slideDown {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* 仿浏览器窗口样式 */
.browser-window {
    width: 90%;
    max-width: 400px;
    height: 350px; /* 默认高度 */
    background: #f0f0f0; /* 浅灰背景 */
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: height 0.3s ease, width 0.3s ease;
}

/* 全屏模式 */
.browser-window.fullscreen {
    width: 95%;
    height: 90%;
}

/* 标签栏头部 - 增加特异性以避免与 main.js 冲突 */
.browser-window .tabs-head {
    background-color: #353535;
    height: 40px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-left: 20px;
    flex-shrink: 0;
    padding-bottom: 0;
    position: relative;
    z-index: 20;
}

.browser-window .tabs {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none; /* 隐藏滚动条 */
    padding-bottom: 0;
    align-items: flex-end;
}
.browser-window .tabs::-webkit-scrollbar { display: none; }

.browser-window .tab-open {
    width: 100px;
    height: 30px;
    border-radius: 7px 7px 0 0;
    background-color: transparent; /* 未激活时透明或深色 */
    display: flex;
    gap: 5px;
    align-items: center;
    justify-content: space-between;
    padding: 4px 8px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-right: 5px;
    margin-bottom: 5px;
}

.browser-window .tab-open:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.browser-window .tab-open.active {
    background-color: #515151; /* 激活标签背景色与地址栏一致 */
    z-index: 22; /* 确保选中项在最上层 */
}

/* 左侧圆角遮罩 (实际在右侧) */
.browser-window .tab-open .rounded-l {
    position: absolute;
    background-color: #515151;
    width: 20px;
    height: 24px;
    bottom: 0;
    right: 0;
    transform: translate(100%);
    overflow: hidden;
    transition: background-color 0.2s;
    display: none; /* 默认隐藏 */
}
.browser-window .tab-open .rounded-l .mask-round {
    width: 100%;
    height: 100%;
    background-color: #353535;
    border-radius: 0 0 0 7px;
}

/* 右侧圆角遮罩 (实际在左侧) */
.browser-window .tab-open .rounded-r {
    position: absolute;
    background-color: #515151;
    width: 20px;
    height: 24px;
    bottom: 0;
    left: 0;
    transform: translate(-100%);
    overflow: hidden;
    transition: background-color 0.2s;
    display: none; /* 默认隐藏 */
}
.browser-window .tab-open .rounded-r .mask-round {
    width: 100%;
    height: 100%;
    background-color: #353535;
    border-radius: 0 0 7px 0;
}

/* Active 状态下显示遮罩 */
.browser-window .tab-open.active .rounded-l,
.browser-window .tab-open.active .rounded-r {
    display: block;
    background-color: #515151;
}

.browser-window .tab-open span {
    color: #aaa;
    font-size: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}

.browser-window .tab-open.active span {
    color: #fff;
    font-weight: 600;
}

.browser-window .tab-open .close-tab {
    color: #aaa;
    font-size: 9px;
    padding: 1px 4px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.browser-window .tab-open.active .close-tab {
    color: #fff;
}

.browser-window .tab-open .close-tab:hover {
    background-color: #5d5d5d;
}
.browser-window .tab-open.active .close-tab:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* 窗口操作按钮 */
.browser-window .window-opt {
    display: flex;
    align-items: center;
    padding-right: 10px;
}

.browser-window .window-opt button {
    height: 30px;
    width: 30px;
    border: none;
    background-color: transparent;
    transition: 0.1s ease-out;
    color: #fff;
    margin-bottom: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.browser-window .window-opt button:hover {
    background-color: #515151c8;
}

.browser-window .window-opt .window-close:hover {
    background-color: rgb(255, 52, 52);
}

/* 地址栏区域 */
.browser-window .head-browser {
    position: relative;
    margin-top: -10px;
    width: 100%;
    height: 40px;
    background-color: #515151;
    padding: 7px;
    display: flex;
    border-radius: 7px 7px 0 0;
    gap: 5px;
    flex-shrink: 0;
    z-index: 21;
    align-items: center;
}

.browser-window .head-browser button {
    width: 27px;
    height: 25px;
    border: none;
    background-color: transparent;
    color: #fff;
    border-radius: 50%;
    transition: 0.2s ease-in-out;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.browser-window .head-browser button:disabled {
    opacity: 0.4;
    cursor: default;
}

.browser-window .head-browser button:hover {
    background-color: #5d5d5d;
}

.browser-window .head-browser button:disabled:hover {
    background-color: transparent;
}

.browser-window .head-browser .star {
    color: #fff;
    position: absolute;
    right: 45px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 15px;
    opacity: 0.7;
    height: 18px;
    width: 19px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 3px;
}

.browser-window .address-bar {
    background-color: #3b3b3b;
    border: 2px solid transparent;
    height: 100%;
    border-radius: 20px;
    outline: none;
    color: #fff;
    padding: 0 15px;
    flex: 1;
    transition: 0.2s ease-in-out;
    display: flex;
    align-items: center;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.browser-window .address-bar:hover {
    background-color: #5d5d5d;
}

/* 内容区域 */
.browser-window .browser-content {
    flex-grow: 1;
    background-color: #fff;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
}

.browser-window .browser-content .empty-state {
    text-align: center;
    color: #999;
    margin-top: 50px;
    font-size: 14px;
}

/* 私聊消息样式 */
.private-msg {
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    max-width: 85%;
}

.private-msg.left {
    align-self: flex-start;
}

.private-msg.right {
    align-self: flex-end;
    align-items: flex-end;
}

.private-msg-sender {
    font-size: 10px;
    color: #888;
    margin-bottom: 2px;
    margin-left: 4px;
}

.private-msg.right .private-msg-sender {
    margin-right: 4px;
    margin-left: 0;
}

.private-msg-bubble {
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.4;
    word-wrap: break-word;
}

.private-msg.left .private-msg-bubble {
    background-color: #f0f0f0;
    color: #333;
    border-bottom-left-radius: 2px;
}

.private-msg.right .private-msg-bubble {
    background-color: #007bff; /* 蓝色气泡 */
    color: #fff;
    border-bottom-right-radius: 2px;
}