/* ============================================================
 * 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; }

/* 颜色变量同时供底栏和发布面板使用，支持手动与系统自动深色模式。 */
.knn-mobile-tabbar, .knn-tabbar-popup {
    --knn-tabbar-text: var(--knn-tabbar-light-text, #86909c);
    --knn-tabbar-active: var(--knn-tabbar-light-active, var(--knn-color-primary, #409eff));
    --knn-tabbar-background: var(--knn-tabbar-light-background, #fff);
    --knn-tabbar-popup-text: #4e5969;
}
body.dark-mode .knn-mobile-tabbar, body.dark-mode .knn-tabbar-popup {
    --knn-tabbar-text: var(--knn-tabbar-dark-text, #a6acb6);
    --knn-tabbar-active: var(--knn-tabbar-dark-active, var(--knn-color-primary, #409eff));
    --knn-tabbar-background: var(--knn-tabbar-dark-background, #272727);
    --knn-tabbar-popup-text: #c9cdd4;
}
@media (prefers-color-scheme: dark) {
    body.dark-mode-auto .knn-mobile-tabbar, body.dark-mode-auto .knn-tabbar-popup {
        --knn-tabbar-text: var(--knn-tabbar-dark-text, #a6acb6);
        --knn-tabbar-active: var(--knn-tabbar-dark-active, var(--knn-color-primary, #409eff));
        --knn-tabbar-background: var(--knn-tabbar-dark-background, #272727);
        --knn-tabbar-popup-text: #c9cdd4;
    }
}

@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: var(--knn-tabbar-background);
        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-mobile-tabbar .knn-tabbar-item,
    .knn-mobile-tabbar .knn-tabbar-item:visited,
    .knn-mobile-tabbar .knn-tabbar-item:hover,
    .knn-mobile-tabbar .knn-tabbar-item:focus {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2px;
        min-height: 52px;
        padding: 5px 0;
        position: relative;
        color: var(--knn-tabbar-text);
        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-mobile-tabbar .knn-tabbar-item.active,
    .knn-mobile-tabbar .knn-tabbar-item.active:visited,
    .knn-mobile-tabbar .knn-tabbar-item.active:hover,
    .knn-mobile-tabbar .knn-tabbar-item.active:focus { color: var(--knn-tabbar-active); }
    .knn-mobile-tabbar .knn-tabbar-item > i,
    .knn-mobile-tabbar .knn-tabbar-item > span { color: inherit; }
    .knn-mobile-tabbar .knn-tabbar-item:focus-visible { outline: 2px solid var(--knn-tabbar-active); outline-offset: -2px; }

    /* 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-mobile-tabbar .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-tabbar-active);
        color: #fff;
        font-size: 19px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.18);
    }

    /* ---------- 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: var(--knn-tabbar-background);
        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: var(--knn-tabbar-popup-text);
        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: var(--knn-tabbar-background);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.4);
    }
    body.dark-mode .knn-tabbar-popup-panel { background: var(--knn-tabbar-background); }
    body.dark-mode .knn-tabbar-popup-item { color: var(--knn-tabbar-popup-text); }
}