/* ============================================================
 * MultiLang 多语言切换器样式
 * version: 1.0.0
 * ============================================================ */

/* ---- 通用变量 ---- */
.multilang-switcher {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    box-sizing: border-box;
    z-index: 9999;
}

.multilang-switcher *,
.multilang-switcher *::before,
.multilang-switcher *::after {
    box-sizing: border-box;
}

.multilang-switcher a {
    text-decoration: none;
    transition: all 0.2s ease;
}

/* ---- 文字标签样式 ---- */
.multilang-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.multilang-item a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
}

.multilang-flag {
    font-size: 16px;
    line-height: 1;
}

/* ---- 顶部栏位置 ---- */
.multilang-topbar {
    position: relative;
    display: inline-flex;
}

.multilang-topbar .multilang-item a {
    color: #fff;
    opacity: 0.7;
}

.multilang-topbar .multilang-item a:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.15);
}

.multilang-topbar .multilang-active a {
    opacity: 1;
    background: rgba(255, 255, 255, 0.25);
    font-weight: 600;
}

/* 顶部栏容器（自动注入时使用） */
#multilang-topbar-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 99999;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 6px 16px;
    font-size: 13px;
    line-height: 1.4;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

/* 顶部栏激活时给 body 添加上边距（由 JS 控制） */
body.multilang-has-topbar {
    padding-top: 36px !important;
}

@media (max-width: 768px) {
    body.multilang-has-topbar {
        padding-top: 32px !important;
    }
}

/* ---- 悬浮按钮位置 ---- */
.multilang-float {
    position: fixed;
    z-index: 99998;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    padding: 4px;
    flex-direction: column;
    gap: 2px;
}

.multilang-float.multilang-bottom-right {
    bottom: 20px;
    right: 20px;
}

.multilang-float.multilang-bottom-left {
    bottom: 20px;
    left: 20px;
}

.multilang-float.multilang-top-right {
    top: 100px;
    right: 20px;
}

.multilang-float.multilang-top-left {
    top: 100px;
    left: 20px;
}

.multilang-float.multilang-right-middle {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 99998;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    padding: 4px;
    flex-direction: column;
    gap: 2px;
}

.multilang-float .multilang-list {
    flex-direction: column;
}

.multilang-float .multilang-item a {
    color: #333;
    padding: 6px 12px;
    border-radius: 4px;
}

.multilang-float .multilang-item a:hover {
    background: #f0f0f0;
}

.multilang-float .multilang-active a {
    background: #e3f2fd;
    color: #1a73e8;
    font-weight: 600;
}

/* ---- 页脚位置 ---- */
.multilang-footer {
    display: inline-flex;
    margin: 8px 0;
}

.multilang-footer .multilang-item a {
    color: #666;
    padding: 4px 8px;
}

.multilang-footer .multilang-item a:hover {
    color: #333;
    background: rgba(0, 0, 0, 0.05);
}

.multilang-footer .multilang-active a {
    color: #1a73e8;
    font-weight: 600;
}

/* ---- 手动放置（融入文章元信息行） ---- */
.multilang-manual {
    display: inline-flex;
    vertical-align: baseline;
    padding: 0;
    margin-left: 6px;
    font-size: 12px;
    line-height: 1;
}

.multilang-manual .multilang-list {
    gap: 0;
}

.multilang-manual .multilang-item a {
    display: inline-block;
    color: #999;
    border: none;
    border-bottom: 1px solid #ddd;
    padding: 1px 5px;
    margin: 0;
    border-radius: 0;
    font-size: 12px;
    line-height: 1.4;
    background: transparent;
}

.multilang-manual .multilang-item a:hover {
    color: #1a73e8;
    border-bottom-color: #1a73e8;
    background: transparent;
}

.multilang-manual .multilang-active a {
    color: #1a73e8;
    border-bottom-color: #1a73e8;
    background: transparent;
    font-weight: normal;
}

/* ---- 下拉菜单切换器样式 (dropdown wrapper) ---- */
.multilang-dropdown-wrapper {
    position: relative;
    display: inline-block;
    z-index: 99998;
}

/* 当 dropdown 同时有 float 定位时，恢复 fixed */
.multilang-dropdown-wrapper.multilang-float {
    position: fixed;
    display: block;
}

.multilang-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: #333;
    transition: all 0.2s ease;
    user-select: none;
}

.multilang-dropdown-toggle:hover {
    border-color: #1a73e8;
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.15);
}

.multilang-dropdown-toggle .multilang-flag {
    font-size: 18px;
}

.multilang-dropdown-toggle .multilang-label {
    font-weight: 500;
}

.multilang-dropdown-toggle .multilang-arrow {
    font-size: 10px;
    color: #999;
    margin-left: 2px;
    transition: transform 0.2s ease;
}

.multilang-dropdown-wrapper.multilang-open .multilang-arrow {
    transform: rotate(180deg);
}

.multilang-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin: 4px 0 0 0;
    padding: 4px;
    list-style: none;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all 0.2s ease;
    z-index: 99999;
}

.multilang-dropdown-wrapper.multilang-open .multilang-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 底部位置时菜单向上展开，避免超出视口 */
.multilang-dropdown-wrapper.multilang-float.multilang-bottom-right .multilang-dropdown-menu,
.multilang-dropdown-wrapper.multilang-float.multilang-bottom-left .multilang-dropdown-menu,
.multilang-dropdown-wrapper.multilang-float.multilang-right-middle .multilang-dropdown-menu {
    top: auto;
    bottom: 100%;
    margin: 0 0 4px 0;
    transform: translateY(4px);
}

.multilang-dropdown-wrapper.multilang-float.multilang-bottom-right.multilang-open .multilang-dropdown-menu,
.multilang-dropdown-wrapper.multilang-float.multilang-bottom-left.multilang-open .multilang-dropdown-menu,
.multilang-dropdown-wrapper.multilang-float.multilang-right-middle.multilang-open .multilang-dropdown-menu {
    transform: translateY(0);
}

.multilang-dropdown-item a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    color: #333;
    font-size: 13px;
    cursor: pointer;
}

.multilang-dropdown-item a:hover {
    background: #f5f5f5;
}

.multilang-dropdown-item.multilang-active a {
    background: #e3f2fd;
    color: #1a73e8;
    font-weight: 600;
}

.multilang-dropdown-item .multilang-flag {
    font-size: 18px;
}

/* ---- 下拉菜单样式 (select 元素，兼容性保留) ---- */
.multilang-dropdown {
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    background: #fff;
    outline: none;
    transition: border-color 0.2s;
}

.multilang-dropdown:hover,
.multilang-dropdown:focus {
    border-color: #1a73e8;
}

.multilang-float .multilang-dropdown,
.multilang-topbar .multilang-dropdown {
    border: none;
}

.multilang-topbar .multilang-dropdown {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.multilang-topbar .multilang-dropdown option {
    color: #333;
}

/* ---- 响应式：移动端（≤768px）全面适配 ---- */
@media (max-width: 768px) {
    /* 顶部栏移动端 */
    #multilang-topbar-wrapper {
        padding: 4px 10px;
        font-size: 12px;
    }

    /* ===== 悬浮按钮通用移动端调整 ===== */
    .multilang-float {
        padding: 3px;
        border-radius: 6px;
        box-shadow: 0 1px 8px rgba(0, 0, 0, 0.12);
    }

    /* 所有悬浮位置统一改为水平排列，防止垂直变形 */
    .multilang-float .multilang-list {
        flex-direction: row;
        gap: 1px;
    }

    .multilang-float .multilang-item a {
        padding: 5px 9px;
        font-size: 12px;
        border-radius: 4px;
    }

    .multilang-flag {
        font-size: 14px;
    }

    /* ===== 右下角（bottom-right）===== */
    .multilang-float.multilang-bottom-right {
        bottom: 10px;
        right: 10px;
    }

    /* ===== 左下角（bottom-left）===== */
    .multilang-float.multilang-bottom-left {
        bottom: 10px;
        left: 10px;
    }

    /* ===== 右上角（top-right）===== */
    .multilang-float.multilang-top-right {
        top: 90px;       /* 下移避开导航栏 */
        right: 10px;
    }

    /* ===== 左上角（top-left）===== */
    .multilang-float.multilang-top-left {
        top: 90px;       /* 下移避开导航栏 */
        left: 10px;
    }

    /* ===== 右侧中部（right-middle）—— 移到屏幕底部上方水平排列 ===== */
    .multilang-float.multilang-right-middle {
        position: fixed;
        right: 8px;
        top: auto;
        bottom: 55px;     /* 底部导航栏上方 */
        transform: none;
        flex-direction: row;
        padding: 3px;
    }

    .multilang-float.multilang-right-middle .multilang-list {
        flex-direction: row;
    }

    .multilang-float.multilang-right-middle .multilang-item a {
        padding: 5px 9px;
        font-size: 12px;
    }

    /* ===== 下拉菜单移动端适配 ===== */
    .multilang-dropdown-wrapper {
        z-index: 99998;
    }

    .multilang-dropdown-toggle {
        padding: 5px 10px;
        font-size: 12px;
        gap: 4px;
    }

    .multilang-dropdown-toggle .multilang-flag {
        font-size: 16px;
    }

    .multilang-dropdown-toggle .multilang-arrow {
        font-size: 9px;
    }

    .multilang-dropdown-menu {
        min-width: 120px;
        padding: 3px;
        border-radius: 6px;
    }

    .multilang-dropdown-item a {
        padding: 7px 10px;
        font-size: 12px;
        gap: 6px;
    }

    .multilang-dropdown-item .multilang-flag {
        font-size: 16px;
    }
}

/* ---- 切换动画 ---- */
.multilang-switching {
    opacity: 0.5;
    pointer-events: none;
    transition: opacity 0.2s;
}

/* ---- 加载指示器 ---- */
.multilang-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 999999;
    display: none;
}

.multilang-loading.show {
    display: block;
}