/**
 * 主题切换按钮样式
 * ===========================================
 * 为主题切换按钮提供专用样式和动画效果
 */

/* 主题切换按钮基础样式 */
#theme-toggle-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    min-width: 44px;
    transition: all var(--transition-normal);
    border: none;
}

/* 主题图标样式 */
#theme-toggle-btn .theme-icon-svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-normal), color var(--transition-normal);
    color: var(--color-text-primary);
}

/* 悬停效果 */
#theme-toggle-btn:hover .theme-icon-svg {
    transform: scale(1.1);
    color: var(--color-primary);
}

/* 主题特定样式 */
[data-theme="dark"] #theme-toggle-btn .theme-icon {
    color: var(--color-secondary);
}

[data-theme="light"] #theme-toggle-btn .theme-icon {
    color: var(--color-warning);
}

[data-theme="high-contrast"] #theme-toggle-btn .theme-icon {
    color: var(--color-white);
}

/* 按钮激活状态 */
#theme-toggle-btn:active {
    transform: scale(0.95);
}

/* 主题切换动画 */
@keyframes theme-switch {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
    100% { transform: rotate(360deg) scale(1); }
}

#theme-toggle-btn.switching .theme-icon {
    animation: theme-switch 0.6s ease-in-out;
}

/* 工具提示增强 */
#theme-toggle-btn::after {
    content: attr(title);
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    /* 使用浅灰背景以与工具栏提示一致 */
    background: rgba(240, 240, 240, 0.95);
    color: #333;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: var(--z-index-tooltip);
    pointer-events: none;
    border: none;
}

#theme-toggle-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-2px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    #theme-toggle-btn .theme-indicator {
        display: none;
    }
}

/* 高对比度模式增强 */
[data-theme="high-contrast"] #theme-toggle-btn {
    border: none;
}

[data-theme="high-contrast"] #theme-toggle-btn:hover {
    background: var(--color-white);
    color: var(--color-black);
}

/* 为主题切换按钮添加无障碍支持 */
#theme-toggle-btn:focus {
    outline: none;
}

/* 减少动画的用户偏好支持 */
@media (prefers-reduced-motion: reduce) {
    #theme-toggle-btn,
    #theme-toggle-btn .theme-icon,
    #theme-toggle-btn .theme-indicator {
        transition: none !important;
    }
    
    #theme-toggle-btn.switching .theme-icon {
        animation: none !important;
    }
}