/**
 * 主题切换按钮精致样式
 * Apple 风格，极简优雅
 */

/* ========== 主题切换按钮基础样式 ========== */
[data-theme-toggle] {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: var(--btn-ghost-bg);
    border: 1px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

[data-theme-toggle]:hover {
    background-color: var(--btn-ghost-hover);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

[data-theme-toggle]:active {
    transform: scale(0.95);
}

[data-theme-toggle]:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* ========== 图标动画 ========== */
[data-theme-toggle] svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 太阳图标旋转 */
[data-theme="light"] [data-theme-toggle] svg {
    transform: rotate(0deg);
}

[data-theme="dark"] [data-theme-toggle] svg {
    transform: rotate(180deg);
}

/* ========== 悬停提示 ========== */
[data-theme-toggle]::after {
    content: attr(title);
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%) scale(0.9);
    padding: 6px 12px;
    background-color: var(--modal-bg);
    color: var(--text-primary);
    font-size: 12px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-medium);
    z-index: 1000;
}

[data-theme-toggle]:hover::after {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

/* ========== 浮动按钮样式（用于无 Header 的页面）========== */
.theme-toggle-floating {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--card-bg);
    border: 1px solid var(--border-medium);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.theme-toggle-floating:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .theme-toggle-floating {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .theme-toggle-floating:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

/* 浮动按钮的提示位置 */
.theme-toggle-floating::after {
    bottom: auto;
    right: 70px;
    left: auto;
    transform: translateY(-50%) scale(0.9);
    top: 50%;
}

.theme-toggle-floating:hover::after {
    transform: translateY(-50%) scale(1);
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
    .theme-toggle-floating {
        width: 48px;
        height: 48px;
        bottom: 16px;
        right: 16px;
    }

    [data-theme-toggle]::after {
        display: none; /* 移动端隐藏提示 */
    }
}

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

[data-theme-toggle].switching svg {
    animation: theme-switch 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 主题切换时的页面过渡 ========== */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                fill 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                stroke 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* ========== 键盘导航支持 ========== */
[data-theme-toggle]:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* ========== 高对比度模式 ========== */
@media (prefers-contrast: high) {
    [data-theme-toggle] {
        border: 2px solid var(--border-strong);
    }

    [data-theme-toggle]:hover {
        border-color: var(--text-primary);
    }
}

/* ========== 减少动画模式 ========== */
@media (prefers-reduced-motion: reduce) {
    [data-theme-toggle],
    [data-theme-toggle] svg,
    [data-theme-toggle]::after {
        transition: none !important;
        animation: none !important;
    }
}