/* ============================================================
 * 全站移动端底部菜单（core/mobile-tabbar.php 输出）
 * 桌面端隐藏，仅 <=768px 小屏显示
 * ============================================================ */

.knn-mobile-tabbar,
.knn-tabbar-placeholder,
.knn-tabbar-popup { display: none; }

@media (max-width: 768px) {

    /* ---------- 菜单栏 ---------- */
    .knn-mobile-tabbar {
        display: flex;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1035;
        justify-content: space-around;
        align-items: center;
        background: #FFFFFF;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
        padding-bottom: constant(safe-area-inset-bottom);
        padding-bottom: env(safe-area-inset-bottom);
    }
    .knn-tabbar-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2px;
        min-height: 52px;
        padding: 5px 0;
        position: relative;
        color: #86909C;
        font-size: 12px;
        line-height: 1.2;
        text-decoration: none;
        /* 关闭移动端浏览器默认的点按高亮（整块浅蓝色覆盖） */
        -webkit-tap-highlight-color: transparent;
        outline: none;
    }
    .knn-tabbar-item i { font-size: 21px; line-height: 1; }
    .knn-tabbar-item.active { color: var(--knn-color-primary, #409EFF); }

    /* 未读消息小红点（图标右上角） */
    .knn-tabbar-badge {
        position: absolute;
        top: 2px;
        left: calc(50% + 5px);
        min-width: 16px;
        height: 16px;
        padding: 0 4px;
        border-radius: 8px;
        background: #FF5E5C;
        color: #fff;
        font-size: 10px;
        font-style: normal;
        line-height: 16px;
        text-align: center;
        box-sizing: border-box;
    }

    /* 凸起圆形按钮（如发布） */
    .knn-tabbar-item.knn-tabbar-highlight { overflow: visible; }
    .knn-tabbar-item.knn-tabbar-highlight i {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        margin-top: -22px;
        border-radius: 50%;
        background: var(--knn-color-primary, #409EFF);
        color: #fff;
        font-size: 19px;
        box-shadow: 0 4px 10px rgba(64, 158, 255, 0.4);
    }

    /* 页尾占位，避免内容被菜单栏遮挡 */
    .knn-tabbar-placeholder {
        display: block;
        height: calc(62px + env(safe-area-inset-bottom));
    }

    /* ---------- 发布弹出面板 ---------- */
    .knn-tabbar-popup {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 1040;
        visibility: hidden;
        pointer-events: none;
    }
    .knn-tabbar-popup.show {
        visibility: visible;
        pointer-events: auto;
    }
    .knn-tabbar-popup-mask {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        opacity: 0;
        transition: opacity .25s;
    }
    .knn-tabbar-popup.show .knn-tabbar-popup-mask { opacity: 1; }
    .knn-tabbar-popup-panel {
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        display: flex;
        justify-content: space-evenly;
        align-items: flex-start;
        gap: 10px;
        padding: 28px 15px calc(30px + env(safe-area-inset-bottom));
        background: #FFFFFF;
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
        transition: transform .25s ease;
    }
    .knn-tabbar-popup.show .knn-tabbar-popup-panel { transform: translateY(0); }
    .knn-tabbar-popup-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 9px;
        color: #4E5969;
        font-size: 13px;
        text-decoration: none;
        -webkit-tap-highlight-color: transparent;
        outline: none;
    }
    .knn-tabbar-popup-item i {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        color: #fff;
        font-size: 21px;
    }
    /* 圆形彩色图标（按功能区分配色） */
    .knn-tabbar-popup-item.knn-popup-article i {
        background: linear-gradient(135deg, #36D1DC, #5B86E5);
        box-shadow: 0 4px 10px rgba(91, 134, 229, 0.35);
    }
    .knn-tabbar-popup-item.knn-popup-forum i {
        background: linear-gradient(135deg, #FF9A44, #FC6076);
        box-shadow: 0 4px 10px rgba(252, 96, 118, 0.35);
    }

    /* ---------- 深色模式 ---------- */
    body.dark-mode .knn-mobile-tabbar {
        background: #272727;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.4);
    }
    body.dark-mode .knn-tabbar-popup-panel { background: #272727; }
    body.dark-mode .knn-tabbar-popup-item { color: #C9CDD4; }
}