/**
 * 主题切换按钮样式
 * 固定在页面右下角
 */

.fixed-theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
    font-size: 1.5rem;
}

.fixed-theme-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

.fixed-theme-toggle:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 亮色模式显示月亮图标 */
.light-mode .fixed-theme-toggle .icon-moon,
.dark-mode .fixed-theme-toggle .icon-sun {
    display: block;
}

.light-mode .fixed-theme-toggle .icon-sun,
.dark-mode .fixed-theme-toggle .icon-moon {
    display: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .fixed-theme-toggle {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.25rem;
    }
}

/* 无障碍焦点样式 */
.fixed-theme-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(47, 128, 237, 0.5), 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* 动画效果 */
.fixed-theme-toggle .icon-sun,
.fixed-theme-toggle .icon-moon {
    transition: transform 0.5s;
}

.fixed-theme-toggle:hover .icon-sun {
    transform: rotate(45deg);
}

.fixed-theme-toggle:hover .icon-moon {
    transform: rotate(-45deg);
}