/**
 * Enhanced I18n System Styles
 * Provides visual feedback and smooth transitions for language switching
 */

/* Loading state styles */
.i18n-loading {
    cursor: wait;
}

.i18n-loading .lang-selector,
.i18n-loading [data-language-selector] {
    opacity: 0.6;
    cursor: wait;
}

/* Prevent flash of untranslated content (FOUC) */
[data-i18n]:empty::before {
    content: "...";
    color: #9ca3af;
    font-style: italic;
}

/* Language selector styling */
.lang-selector,
[data-language-selector] {
    transition: opacity 0.2s ease-in-out;
}

.lang-selector:disabled,
[data-language-selector]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Smooth content transitions and FOUC prevention */
[data-i18n] {
    transition: opacity 0.15s ease-in-out;
}

.i18n-loading [data-i18n] {
    opacity: 0.8;
}

/* Enhanced transition states for better UX */
.i18n-transitioning {
    opacity: 0.7;
    transition: opacity 0.1s ease-in-out;
}

/* Prevent flash of untranslated content during initialization */
.i18n-initializing [data-i18n]:empty {
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.i18n-ready [data-i18n] {
    opacity: 1;
}

/* Enhanced FOUC prevention */
.i18n-initializing [data-i18n-hidden] {
    visibility: hidden !important;
    opacity: 0;
}

.i18n-ready [data-i18n] {
    visibility: visible;
    opacity: 1;
    transition: opacity 0.3s ease-in-out;
}

/* Smooth content reveal animation */
@keyframes i18n-reveal {
    from {
        opacity: 0;
        transform: translateY(2px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.i18n-ready [data-i18n] {
    animation: i18n-reveal 0.3s ease-out;
}

/* Stagger animation for multiple elements */
.i18n-ready [data-i18n]:nth-child(1) { animation-delay: 0ms; }
.i18n-ready [data-i18n]:nth-child(2) { animation-delay: 50ms; }
.i18n-ready [data-i18n]:nth-child(3) { animation-delay: 100ms; }
.i18n-ready [data-i18n]:nth-child(4) { animation-delay: 150ms; }
.i18n-ready [data-i18n]:nth-child(5) { animation-delay: 200ms; }

/* Loading indicator for language selectors */
.lang-selector.loading::after,
[data-language-selector].loading::after {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid #e5e7eb;
    border-top: 2px solid #3b82f6;
    border-radius: 50%;
    animation: i18n-spin 1s linear infinite;
}

@keyframes i18n-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error state styling */
.i18n-error [data-i18n] {
    color: #ef4444;
    font-style: italic;
}

.i18n-error [data-i18n]::after {
    content: " (translation error)";
    font-size: 0.8em;
    opacity: 0.7;
}

/* Accessibility improvements */
.lang-selector:focus,
[data-language-selector]:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
    .lang-selector,
    [data-language-selector] {
        font-size: 14px;
        padding: 8px 12px;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .i18n-loading [data-i18n] {
        opacity: 1;
    }
    
    [data-i18n]:empty::before {
        color: currentColor;
        opacity: 0.8;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .lang-selector,
    [data-language-selector],
    [data-i18n] {
        transition: none;
    }
    
    @keyframes i18n-spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(0deg); }
    }
}