/**
 * 语言切换器样式
 * 支持RTL和LTR布局的响应式设计
 */

/* 基础语言切换器样式 */
.language-switcher,
.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    position: relative;
    overflow: hidden;
    /* 触摸设备优化 */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.language-switcher:hover,
.language-switch:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.language-switcher:active,
.language-switch:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* 语言切换器图标 */
.language-switcher .flag,
.language-switch .flag {
    font-size: 16px;
    line-height: 1;
}

/* 语言切换器文本 */
.language-switcher .text,
.language-switch .text {
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 固定位置的语言切换器 */
.language-switcher.fixed {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(15px);
}

.language-switcher.fixed:hover {
    background: rgba(0, 0, 0, 0.9);
}

/* RTL布局支持 */
[dir="rtl"] .language-switcher.fixed {
    right: auto;
    left: 20px;
}

[dir="rtl"] .language-switcher,
[dir="rtl"] .language-switch {
    flex-direction: row-reverse;
}

/* 语言切换下拉菜单 */
.language-dropdown {
    position: relative;
    display: inline-block;
}

.language-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    color: white;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-dropdown-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
}

.language-dropdown-toggle::after {
    content: '▼';
    font-size: 10px;
    margin-left: 8px;
    transition: transform 0.3s ease;
}

[dir="rtl"] .language-dropdown-toggle::after {
    margin-left: 0;
    margin-right: 8px;
}

.language-dropdown.open .language-dropdown-toggle::after {
    transform: rotate(180deg);
}

.language-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 150px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    margin-top: 8px;
}

[dir="rtl"] .language-dropdown-menu {
    left: auto;
    right: 0;
}

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

.language-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
    border-radius: 8px;
    margin: 4px;
}

.language-dropdown-item:hover {
    background: #f8f9fa;
    color: #007AFF;
    text-decoration: none;
}

.language-dropdown-item.active {
    background: #007AFF;
    color: white;
}

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

/* 语言切换动画效果 */
.language-switch-animation {
    position: relative;
    overflow: hidden;
}

.language-switch-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.language-switch-animation:hover::before {
    left: 100%;
}

/* 语言指示器 */
.language-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

.language-indicator .flag {
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .language-switcher,
    .language-switch {
        padding: 6px 12px;
        font-size: 12px;
        border-radius: 15px;
    }
    
    .language-switcher.fixed {
        top: 15px;
        right: 15px;
        padding: 8px 12px;
    }
    
    [dir="rtl"] .language-switcher.fixed {
        right: auto;
        left: 15px;
    }
    
    .language-dropdown-menu {
        min-width: 120px;
    }
    
    .language-dropdown-item {
        padding: 10px 12px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .language-switcher .text,
    .language-switch .text {
        display: none;
    }
    
    .language-switcher,
    .language-switch {
        padding: 8px;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        justify-content: center;
    }
    
    .language-switcher.fixed {
        top: 10px;
        right: 10px;
    }
    
    [dir="rtl"] .language-switcher.fixed {
        right: auto;
        left: 10px;
    }
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
    .language-dropdown-menu {
        background: #2c2c2c;
        border: 1px solid #444;
    }
    
    .language-dropdown-item {
        color: #e0e0e0;
    }
    
    .language-dropdown-item:hover {
        background: #3c3c3c;
        color: #4A90E2;
    }
}

/* 高对比度支持 */
@media (prefers-contrast: high) {
    .language-switcher,
    .language-switch {
        border: 2px solid white;
        background: rgba(0, 0, 0, 0.8);
    }
    
    .language-switcher:hover,
    .language-switch:hover {
        background: rgba(255, 255, 255, 0.9);
        color: black;
    }
}

/* 减少动画支持 */
@media (prefers-reduced-motion: reduce) {
    .language-switcher,
    .language-switch,
    .language-dropdown-toggle,
    .language-dropdown-menu,
    .language-dropdown-item {
        transition: none;
    }
    
    .language-switch-animation::before {
        display: none;
    }
}

/* 打印样式 */
@media print {
    .language-switcher,
    .language-switch,
    .language-dropdown {
        display: none;
    }
}

/* 语言特定样式 */
[lang="ar"] .language-switcher,
[lang="ar"] .language-switch {
    font-family: 'Noto Sans Arabic', Arial, sans-serif;
}

[lang="fr"] .language-switcher,
[lang="fr"] .language-switch {
    font-family: 'Roboto', Arial, sans-serif;
}

/* 焦点样式（无障碍支持） */
.language-switcher:focus,
.language-switch:focus,
.language-dropdown-toggle:focus {
    outline: 2px solid #4A90E2;
    outline-offset: 2px;
}

.language-dropdown-item:focus {
    outline: 2px solid #4A90E2;
    outline-offset: -2px;
}

/* 键盘导航支持 */
.language-dropdown-item:focus-visible {
    background: #f0f8ff;
    color: #007AFF;
}

/* 语言切换加载状态 */
.language-switcher.loading,
.language-switch.loading {
    pointer-events: none;
    opacity: 0.6;
}

.language-switcher.loading::after,
.language-switch.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 语言切换成功提示 */
.language-switch-success {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #28a745;
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    z-index: 9999;
    opacity: 0;
    animation: slideInOut 3s ease-in-out;
}

@keyframes slideInOut {
    0%, 100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    10%, 90% { opacity: 1; transform: translateX(-50%) translateY(0); }
}