/**
 * i18n Language Switcher Styles
 * TTS Studio Internationalization
 */

/* ==================== Language Switcher Container ==================== */
.lang-switcher {
    position: relative;
    display: inline-flex;
}

/* ==================== Switcher Button ==================== */
.lang-switcher-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 32px;
    padding: 0 10px;
    background: transparent;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary, #6b7280);
    transition: all 0.2s ease;
    font-family: inherit;
}

.lang-switcher-btn:hover {
    background: var(--panel-bg, #f9fafb);
    color: var(--text-primary, #111827);
    border-color: var(--text-secondary, #9ca3af);
}

.lang-switcher-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color, #6366f1), 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.lang-switcher-btn:focus:not(:focus-visible) {
    box-shadow: none;
}

/* Icons */
.lang-switcher-btn .icon {
    flex-shrink: 0;
}

.lang-switcher-btn .globe-icon {
    width: 16px;
    height: 16px;
}

.lang-switcher-btn .chevron-icon {
    width: 10px;
    height: 10px;
    transition: transform 0.2s ease;
}

/* Chevron rotation when dropdown is open */
.lang-switcher:has(.lang-dropdown.active) .chevron-icon {
    transform: rotate(180deg);
}

/* Current language label */
.lang-current {
    font-weight: 500;
    white-space: nowrap;
}

/* ==================== Dropdown Menu ==================== */
.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--card-bg, #ffffff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    padding: 6px;
    display: none;
    z-index: 1000;
}

.lang-dropdown.active {
    display: block;
    animation: langDropdownFadeIn 0.15s ease-out;
}

@keyframes langDropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== Language Option ==================== */
.lang-option {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary, #111827);
    transition: background 0.15s ease;
    gap: 8px;
}

.lang-option:hover {
    background: var(--panel-bg, #f9fafb);
}

.lang-option:focus {
    outline: none;
    background: var(--panel-bg, #f9fafb);
}

.lang-option.active {
    background: var(--panel-bg, #f9fafb);
    color: var(--primary-color, #6366f1);
}

/* Language name */
.lang-name {
    flex: 1;
    font-weight: 500;
}

/* Language code (e.g., EN, 中文) */
.lang-code {
    font-size: 12px;
    color: var(--text-secondary, #6b7280);
    font-weight: 400;
}

.lang-option.active .lang-code {
    color: var(--primary-color, #6366f1);
    opacity: 0.8;
}

/* Checkmark */
.lang-check {
    color: var(--primary-color, #6366f1);
    font-size: 14px;
    font-weight: 600;
    margin-left: auto;
}

/* ==================== Dark Mode Support ==================== */
.dark .lang-switcher-btn {
    border-color: var(--border-color, #374151);
    color: var(--text-secondary, #9ca3af);
}

.dark .lang-switcher-btn:hover {
    background: var(--panel-bg, #1f2937);
    color: var(--text-primary, #f9fafb);
    border-color: var(--text-secondary, #6b7280);
}

.dark .lang-dropdown {
    background: var(--card-bg, #1f2937);
    border-color: var(--border-color, #374151);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.dark .lang-option {
    color: var(--text-primary, #f9fafb);
}

.dark .lang-option:hover,
.dark .lang-option:focus {
    background: var(--panel-bg, #374151);
}

.dark .lang-option.active {
    background: var(--panel-bg, #374151);
}

.dark .lang-code {
    color: var(--text-secondary, #9ca3af);
}

/* ==================== Responsive Adjustments ==================== */
@media (max-width: 768px) {
    .lang-switcher-btn {
        padding: 6px 8px;
    }
    
    .lang-current {
        display: none;
    }
    
    .lang-switcher-btn .chevron-icon {
        display: none;
    }
    
    .lang-dropdown {
        right: -8px;
        min-width: 140px;
    }
}

/* ==================== Accessibility ==================== */
@media (prefers-reduced-motion: reduce) {
    .lang-dropdown.active {
        animation: none;
    }
    
    .lang-switcher-btn .chevron-icon,
    .lang-switcher-btn,
    .lang-option {
        transition: none;
    }
}