/**
 * 🌍 全球国际化样式 V3.0
 * 
 * 包含:
 * 1. RTL (从右到左) 语言适配
 * 2. 语言选择器组件样式
 * 3. 多语言字体优化
 * 4. 响应式布局调整
 */

/* ============================================================
   RTL 语言支持 (阿拉伯语/希伯来语/波斯语/乌尔都语等)
   ============================================================ */

.rtl-mode {
    direction: rtl;
    text-align: right;
}

/* 翻转关键元素 */
.rtl-mode .navbar {
    flex-direction: row-reverse;
}

.rtl-mode .sidebar {
    right: 0;
    left: auto;
    border-right: none;
    border-left: 1px solid var(--exchange-border, #2d3548);
}

.rtl-mode .main-content {
    margin-right: 250px; /* 或侧边栏宽度 */
    margin-left: 0;
}

.rtl-mode .card,
.rtl-mode .exchange-card {
    text-align: right;
}

/* 表格翻转 */
.rtl-mode table th,
.rtl-mode table td {
    text-align: right;
}

.rtl-mode table thead th:first-child {
    border-radius: 0 var(--border-radius, 8px) 0 0;
}

.rtl-mode table thead th:last-child {
    border-radius: var(--border-radius, 8px) 0 0 0;
}

/* 按钮组 */
.rtl-mode .btn-group {
    direction: rtl;
}

.rtl-mode .input-group > :not(:last-child) {
    border-top-left-radius: var(--border-radius, 6px);
    border-bottom-left-radius: var(--border-radius, 6px);
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.rtl-mode .input-group > :not(:first-child) {
    border-top-right-radius: var(--border-radius, 6px);
    border-bottom-right-radius: var(--border-radius, 6px);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* 导航标签 */
.rtl-mode .nav-tabs {
    direction: ltr; /* 标签保持从左到右 */
}

.rtl-mode .tab-content {
    direction: rtl;
}

/* 模态框 */
.rtl-mode .modal-header .btn-close {
    margin-left: 0;
    margin-right: auto;
}

.rtl-mode .modal-footer {
    justify-content: flex-start;
}

/* 下拉菜单 */
.rtl-mode .dropdown-menu {
    text-align: right;
    left: 0;
    right: auto;
}

.rtl-mode .dropdown-item::before {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
}

/* 分页 */
.rtl-mode .pagination {
    direction: ltr; /* 页码保持从左到右 */
}

/* 图标位置微调 */
.rtl-mode .me-2 { margin-left: 0.5rem !important; margin-right: 0 !important; }
.rtl-mode .ms-2 { margin-right: 0.5rem !important; margin-left: 0 !important; }
.rtl-mode .me-3 { margin-left: 1rem !important; margin-right: 0 !important; }
.rtl-mode .ms-3 { margin-right: 1rem !important; margin-left: 0 !important; }

/* 面包屑导航 */
.rtl-mode .breadcrumb-item + .breadcrumb-item::before {
    content: "\\";
    float: right;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

/* 工具提示 */
.rtl-mode .tooltip-inner {
    text-align: center; /* 提示居中 */
}

/* ============================================================
   语言选择器组件
   ============================================================ */

.language-selector {
    position: relative;
    display: inline-block;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.btn-language-current {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(25,118,210,0.1), rgba(13,71,161,0.1));
    border: 1px solid rgba(25,118,210,0.3);
    border-radius: 24px;
    color: var(--text-color, #e0e0e0);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    white-space: nowrap;
}

.btn-language-current:hover {
    background: linear-gradient(135deg, rgba(25,118,210,0.2), rgba(13,71,161,0.2));
    border-color: rgba(25,118,210,0.5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(25,118,210,0.2);
}

.btn-language-current .flag {
    font-size: 20px;
    line-height: 1;
}

.btn-language-current .name {
    font-weight: 500;
}

.btn-language-current .arrow {
    font-size: 10px;
    opacity: 0.7;
    transition: transform 0.3s;
}

.btn-language-current.active .arrow {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 320px;
    max-height: 480px;
    background: var(--card-bg, #1a1f2e);
    border: 1px solid var(--border-color, #2d3548);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    z-index: 10000;
    overflow: hidden;
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 搜索框 */
.language-dropdown .search-box {
    padding: 16px;
    border-bottom: 1px solid var(--border-color, #2d3548);
    position: sticky;
    top: 0;
    background: inherit;
    z-index: 1;
}

.language-dropdown .search-box input {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color, #2d3548);
    border-radius: 8px;
    color: var(--text-color, #e0e0e0);
    font-size: 14px;
    outline: none;
    transition: all 0.2s;
}

.language-dropdown .search-box input:focus {
    border-color: #1976d2;
    box-shadow: 0 0 0 3px rgba(25,118,210,0.15);
}

.language-dropdown .search-box input::placeholder {
    color: var(--text-dim, #8892a4);
}

/* 语言列表容器 */
.lang-list {
    max-height: 360px;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 0;
    
    /* 自定义滚动条 */
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb, #4a5568) transparent;
}

.lang-list::-webkit-scrollbar {
    width: 6px;
}

.lang-list::-webkit-scrollbar-track {
    background: transparent;
}

.lang-list::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb, #4a5568);
    border-radius: 3px;
}

/* 语言项 */
.lang-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
}

.lang-item:hover {
    background: rgba(25,118,210,0.1);
}

.lang-item.active {
    background: rgba(25,118,210,0.15);
    border-left: 3px solid #1976d2;
}

.lang-item .flag {
    font-size: 22px;
    min-width: 28px;
    text-align: center;
    line-height: 1;
}

.lang-item .native-name {
    flex: 1;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-color, #e0e0e0);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lang-item .english-name {
    font-size: 12px;
    color: var(--text-dim, #8892a4);
    opacity: 0.7;
}

/* RTL语言项特殊处理 */
.lang-item[dir="rtl"] {
    text-align: right;
    flex-direction: row-reverse;
}

.lang-item[dir="rtl"] .english-name::after {
    content: '(RTL)';
    font-size: 9px;
    color: #ff9800;
    margin-left: 4px;
}

/* 底部统计 */
.language-dropdown .footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color, #2d3548);
    background: rgba(0,0,0,0.1);
    text-align: center;
}

.language-dropdown .footer small {
    color: var(--text-dim, #8892a4);
    font-size: 11px;
}

/* ============================================================
   多语言字体优化
   ============================================================ */

/* 中文优化 */
[lang^="zh"], [lang*="-CN"], [lang*="-TW"], [lang*="-HK"] {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    letter-spacing: 0.02em;
}

/* 日文优化 */
[lang^="ja"], [lang*="-JP"] {
    font-family: -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans CJK JP", sans-serif;
    line-height: 1.8;
}

/* 韩文优化 */
[lang^="ko"], [lang*="-KR"] {
    font-family: -apple-system, "Malgun Gothic", "Dotum", "Noto Sans KR", sans-serif;
    word-break: keep-all;
}

/* 泰文优化 */
[lang^="th"], [lang*="-TH"] {
    font-family: "Sarabun", "Prompt", -apple-system, sans-serif;
    line-height: 1.8;
}

/* 阿拉伯文优化 (RTL) */
[lang^="ar"], [lang*="-AR"] {
    font-family: "Noto Naskh Arabic", "Amiri", "Tahoma", sans-serif;
    font-size: 105%; /* 阿拉伯文通常需要稍大 */
    line-height: 2;
}

/* 希伯来文优化 (RTL) */
[lang^="he"], [lang*="-IL"] {
    font-family: "Heebo", "Assistant", "Tahoma", sans-serif;
    font-weight: 400;
}

/* 波斯文优化 (RTL) */
[lang^="fa"], [lang*="-IR"] {
    font-family: "Vazirmatn", "Shabnam", "Tahoma", sans-serif;
    line-height: 2.2;
}

/* 印地语优化 */
[lang^="hi"], [lang*="-IN"] {
    font-family: "Noto Sans Devanagari", "Mangal", sans-serif;
    line-height: 1.8;
}

/* 孟加拉语优化 */
[lang^="bn"], [lang*="-BD"] {
    font-family: "Noto Sans Bengali", "SolaimanLipi", sans-serif;
    line-height: 1.8;
}

/* 泰米尔语优化 */
[lang^="ta"], [lang*="-IN"] {
    font-family: "Noto Sans Tamil", "InaiMathi", sans-serif;
    line-height: 1.8;
}

/* 俄语/西里尔字母优化 */
[lang^="ru"], [lang^="uk"], [lang^="bg"], [lang^="sr"] {
    font-family: -apple-system, "PT Sans", "Roboto", "Noto Sans", sans-serif;
}

/* 越南语优化 */
[lang^="vi"], [lang*="-VN"] {
    font-family: "Be Vietnam Pro", "Segoe UI", -apple-system, sans-serif;
}

/* 印尼语优化 */
[lang^="id"], [lang*="-ID"] {
    font-family: "Plus Jakarta Sans", "Segoe UI", -apple-system, sans-serif;
}

/* 德语优化 (长单词) */
[lang^="de"], [lang*="-DE"] {
    word-break: break-word;
    hyphens: auto;
}

/* 法语特殊字符 */
[lang^="fr"], [lang*="-FR"] {
    quotes: '«' '»';
}

/* 西班牙语问号倒置 */
[lang^="es"]:not(.no-inverted) {
    /* CSS无法完全实现，需JS辅助 */
}

/* ============================================================
   响应式调整 (移动端)
   ============================================================ */

@media (max-width: 768px) {
    .language-dropdown {
        width: calc(100vw - 32px);
        right: -60px;
        left: auto;
    }
    
    .btn-language-current .name {
        display: none; /* 移动端只显示国旗和箭头 */
    }
    
    .lang-item .english-name {
        display: none; /* 节省空间 */
    }
    
    .rtl-mode .sidebar {
        transform: translateX(100%);
        transition: transform 0.3s;
    }
    
    .rtl-mode.sidebar-open .sidebar {
        transform: translateX(0);
    }
    
    .rtl-mode .main-content {
        margin-right: 0 !important;
    }
}

/* ============================================================
   动画效果
   ============================================================ */

@keyframes fadeInLanguage {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.language-selector[data-animate] .language-dropdown {
    animation: fadeInLanguage 0.3s ease-out;
}

/* 语言切换时的过渡效果 */
body.transitioning-lang * {
    transition: opacity 0.15s ease !important;
}

body.transitioning-lang {
    opacity: 0.95;
}

/* ============================================================
   打印样式
   ============================================================ */

@media print {
    .language-selector {
        display: none;
    }
    
    .rtl-mode {
        direction: rtl;
    }
}

/* ============================================================
   高对比度模式 / 无障碍访问
   ============================================================ */

@media (prefers-contrast: high) {
    .btn-language-current {
        border-width: 2px;
    }
    
    .lang-item.active {
        background: rgba(25,118,210,0.3);
        outline: 2px solid #1976d2;
    }
}

@media (prefers-reduced-motion: reduce) {
    .language-dropdown {
        animation: none;
    }
    
    .btn-language-current {
        transition: none;
    }
}

/* ============================================================
   暗黑模式增强
   ============================================================

@media (prefers-color-scheme: dark) {
    .language-dropdown {
        box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    }
}
*/

console.log('[OK] 🎨 国际化样式加载完成 | RTL支持 | 116种语言');