/**
 * 国际化 (i18n) 相关样式
 * 语言切换器样式
 */

/* 语言切换器容器 */
.language-switcher {
    position: relative;
    display: inline-block;
    margin-left: 10px;
}

/* 语言切换按钮 */
.language-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-secondary, #f8f9fa);
    border: 1px solid var(--border-color, #dee2e6);
    border-radius: 8px;
    color: var(--text-color, #333);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    min-width: 120px;
    justify-content: space-between;
}

.language-btn:hover {
    background: var(--bg-hover, #e9ecef);
    border-color: var(--primary-color, #007bff);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.language-btn:focus {
    outline: none;
    border-color: var(--primary-color, #007bff);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* 语言旗帜图标 */
.language-flag {
    font-size: 16px;
    line-height: 1;
    min-width: 20px;
    text-align: center;
}

/* 语言名称 */
.language-name {
    flex: 1;
    text-align: left;
    font-weight: 500;
}

/* 下拉箭头 */
.language-arrow {
    font-size: 12px;
    color: var(--text-secondary, #6c757d);
    transition: transform 0.3s ease;
}

.language-btn:hover .language-arrow {
    transform: translateY(-1px);
}

/* 语言下拉菜单 */
.language-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary, #ffffff);
    border: 1px solid var(--border-color, #dee2e6);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 4px;
    overflow: hidden;
}

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

/* 语言选项 */
.language-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--text-color, #333);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    text-align: left;
}

.language-option:hover {
    background: var(--bg-hover, #f8f9fa);
    color: var(--primary-color, #007bff);
}

.language-option.active {
    background: var(--primary-color-light, #e3f2fd);
    color: var(--primary-color, #007bff);
    font-weight: 600;
}

.language-option.active::after {
    content: '✓';
    margin-left: auto;
    color: var(--primary-color, #007bff);
    font-weight: bold;
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
    .language-btn {
        background: var(--dark-bg-secondary, #2d3748);
        border-color: var(--dark-border-color, #4a5568);
        color: var(--dark-text-color, #e2e8f0);
    }

    .language-btn:hover {
        background: var(--dark-bg-hover, #4a5568);
        border-color: var(--dark-primary-color, #3182ce);
    }

    .language-dropdown {
        background: var(--dark-bg-primary, #1a202c);
        border-color: var(--dark-border-color, #4a5568);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .language-option {
        color: var(--dark-text-color, #e2e8f0);
    }

    .language-option:hover {
        background: var(--dark-bg-hover, #2d3748);
        color: var(--dark-primary-color, #3182ce);
    }

    .language-option.active {
        background: var(--dark-primary-color-light, #2c5282);
        color: var(--dark-primary-color, #3182ce);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .language-switcher {
        margin-left: 5px;
    }

    .language-btn {
        min-width: 100px;
        padding: 6px 10px;
        font-size: 13px;
    }

    .language-option {
        padding: 10px 14px;
        font-size: 13px;
    }

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

/* 动画效果 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.language-dropdown.show {
    animation: fadeInDown 0.3s ease;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .language-btn {
        border-width: 2px;
    }

    .language-dropdown {
        border-width: 2px;
    }

    .language-option.active {
        border-left: 3px solid var(--primary-color, #007bff);
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .language-btn,
    .language-dropdown,
    .language-option,
    .language-arrow {
        transition: none;
    }

    .language-dropdown.show {
        animation: none;
    }
}

/* 语言切换器在导航栏中的特殊样式 */
.navbar .language-switcher {
    margin-left: auto;
}

.navbar .language-btn {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.8);
    color: #333333 !important;
    backdrop-filter: blur(10px);
}

.navbar .language-btn .language-name {
    color: #333333 !important;
}

.navbar .language-btn .language-arrow {
    color: #666666 !important;
}

.navbar .language-btn:hover {
    background: rgba(255, 255, 255, 1);
    border-color: rgba(255, 255, 255, 1);
    color: #000000 !important;
}

.navbar .language-btn:hover .language-name {
    color: #000000 !important;
}

.navbar .language-btn:hover .language-arrow {
    color: #333333 !important;
}

.navbar .language-btn:focus {
    border-color: rgba(255, 255, 255, 1);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

/* 确保导航栏下拉菜单的可见性 */
.navbar .language-dropdown {
    background: #ffffff;
    color: #333;
    border: 1px solid #dee2e6;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.navbar .language-option {
    color: #333 !important;
}

.navbar .language-option:hover {
    background: #f8f9fa;
    color: #007bff !important;
}

.navbar .language-option.active {
    background: #e3f2fd;
    color: #007bff !important;
}

/* 加载状态 */
.language-switcher.loading .language-btn {
    opacity: 0.7;
    pointer-events: none;
}

.language-switcher.loading .language-btn::after {
    content: '';
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-right-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: translateY(-50%) rotate(360deg);
    }
}