/**
 * 主题切换圆弧扩散动画
 * 从右上角开始扩散，直接切换CSS主题
 */

/* 主题切换按钮样式 */
.theme-toggle-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: transparent !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10000;
}

/* 动画期间的按钮效果 */
.theme-toggle-btn.animating {
    transform: scale(1.2);
    pointer-events: none;
}

.theme-toggle-btn.animating .icon {
    animation: icon-rotate 0.8s ease-in-out;
}

/* 扩散动画效果 */
@keyframes theme-diffuse {
    0% {
        clip-path: circle(0% at 100% 0%);
    }
    100% {
        clip-path: circle(150% at 100% 0%);
    }
}

/* 主题切换时的页面动画 */
body.theme-transitioning {
    animation: theme-diffuse 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

/* 悬停时的图标效果 */
.theme-toggle-btn:hover .fa-sun-o {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 30%, #FF8C00 60%, #FF6B35 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    text-shadow: 
        0 0 15px rgba(255, 215, 0, 0.9),
        0 0 25px rgba(255, 215, 0, 0.7),
        0 0 35px rgba(255, 215, 0, 0.5),
        0 0 45px rgba(255, 215, 0, 0.3);
}

.theme-toggle-btn:hover .fa-moon-o {
    background: linear-gradient(135deg, #4A90E2 0%, #5B9BD5 25%, #7BB3E8 50%, #9CC3F0 75%, #B8D4F5 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    text-shadow: 
        0 0 15px rgba(74, 144, 226, 0.9),
        0 0 25px rgba(74, 144, 226, 0.7),
        0 0 35px rgba(74, 144, 226, 0.5),
        0 0 45px rgba(74, 144, 226, 0.3);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

.theme-toggle-btn:focus {
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

/* 图标样式 */
.theme-toggle-btn .icon {
    font-size: 20px;
    transition: all 0.3s ease;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: block !important;
}

/* 太阳图标样式 - 金色质感 */
.theme-toggle-btn .fa-sun-o {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 50%, #FF8C00 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
    text-shadow: 
        0 0 10px rgba(255, 215, 0, 0.8),
        0 0 20px rgba(255, 215, 0, 0.6),
        0 0 30px rgba(255, 215, 0, 0.4),
        0 0 40px rgba(255, 215, 0, 0.2);
}

/* 月亮图标样式 - 星空蓝质感 */
.theme-toggle-btn .fa-moon-o {
    background: linear-gradient(135deg, #4A90E2 0%, #5B9BD5 30%, #7BB3E8 60%, #9CC3F0 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
    text-shadow: 
        0 0 10px rgba(74, 144, 226, 0.8),
        0 0 20px rgba(74, 144, 226, 0.6),
        0 0 30px rgba(74, 144, 226, 0.4),
        0 0 40px rgba(74, 144, 226, 0.2);
}

/* 暗色主题下的按钮样式（默认） */
.theme-toggle-btn.dark {
    background: transparent !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

/* 亮色主题下的按钮样式 */
.theme-toggle-btn.light {
    background: transparent !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

/* 图标旋转动画 */
@keyframes icon-rotate {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 图标渐变动画 */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.theme-toggle-btn .fa-sun-o,
.theme-toggle-btn .fa-moon-o {
    background-size: 200% 200% !important;
    animation: gradient-shift 3s ease infinite;
}

.theme-toggle-btn:hover .fa-sun-o,
.theme-toggle-btn:hover .fa-moon-o {
    animation: gradient-shift 1.5s ease infinite;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .theme-toggle-btn {
        width: 44px;
        height: 44px;
    }
    
    .theme-toggle-btn .icon {
        font-size: 22px;
    }
}