/* 布局样式：侧边栏、主内容区域、滚动条 */
.sidebar {
	position: fixed;
	top: 0;
	left: 0;
	width: var(--sidebar-width);
	background: var(--sidebar-bg);
	box-shadow: var(--shadow-md);
	padding: 20px 20px 40px;
	transition:
		width var(--duration-short) var(--ease-in-out-cubic),
		padding var(--duration-short) var(--ease-in-out-cubic),
		background-color var(--duration-short) var(--ease-default);
	overflow-y: auto;
	overflow-x: hidden;
	height: 100vh;
	z-index: 1000;
	/* 侧边栏始终隐藏滚动条 */
	scrollbar-width: none;
	-ms-overflow-style: none;
	box-sizing: border-box;
	border-radius: 0 15px 15px 0;
}

/* 隐藏侧边栏滚动条 */
.sidebar::-webkit-scrollbar {
	display: none;
}

/* 侧边栏滚动提示器 */
.sidebar-scroll-hint {
	position: fixed;
	bottom: 20px;
	left: calc(
		var(--sidebar-width) -
		24px -
		15px
	); /* 侧边栏宽度 - 提示器宽度 - 右边距 */
	width: 24px;
	height: 24px;
	z-index: 1001;
	pointer-events: none;
	opacity: 0;
	transform: translateY(10px) scale(0.8);
	transition:
		opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
		transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-scroll-hint.visible {
	opacity: 0.9;
	transform: translateY(0) scale(1);
}

/* 倒三角图标 */
.sidebar-scroll-hint::before {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 0;
	height: 0;
	border-left: 6px solid transparent;
	border-right: 6px solid transparent;
	border-top: 10px solid var(--link-color);
	filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.3));
}

/* 小于1024px时默认收起侧边栏 */
/* 注意: 1023px 对应 BREAKPOINT_SIDEBAR (1024px) - 1 */
@media screen and (max-width: 1023px) {
	.sidebar:not(.js-initialized) {
		width: 0;
		padding: 0;
		overflow: hidden;
	}
}

.sidebar.collapsed {
	width: 0;
	padding: 0;
	overflow: hidden;
}

/* 侧栏收起时立即隐藏主页按钮和文件夹，但保持切换按钮可见 */
.sidebar.collapsed .home-button,
.sidebar.collapsed .folder {
	opacity: 0;
	visibility: hidden;
	transition: none;
}
.sidebar .folder {
	display: flex;
	align-items: center;
	gap: 8px;
	margin: 1.1rem 0;
	margin-left: 10px;
	user-select: none;
	-webkit-user-drag: none;
	-webkit-touch-callout: none;
	line-height: 1;
}

/* 文件夹区域下移 */
.sidebar #sidebar-folders .folder:first-child {
	margin-top: 2rem;
}
.sidebar .folder-name {
	font-size: 1.1rem;
	padding: 0.5rem 1rem;
	cursor: pointer;
	transition:
		background var(--duration-base) var(--ease-default),
		transform var(--duration-base) var(--ease-default),
		box-shadow var(--duration-base) var(--ease-default);
	border-radius: 4px;
	/* 确保文字垂直居中 */
	display: flex;
	align-items: center;
	line-height: 1;
}
/* 侧边栏悬停效果 - 仅在PC端生效 */
@media (hover: hover) and (pointer: fine) {
	.sidebar .folder-name:hover {
		background: var(--hover-bg);
		box-shadow: 16px 6px 12px rgba(0, 0, 0, 0.3);
		transform: translateY(-2px) scale(1.05);
	}
	[data-theme="dark"] .sidebar .folder-name:hover {
		background: rgba(255, 255, 255, 0.1);
		box-shadow: 0 6px 12px rgba(255, 255, 255, 0.2);
	}
}
.sidebar-header {
	display: flex;
	align-items: center;
	gap: 20px;
	margin-bottom: 20px;
	padding: 0 5px;
	/* 确保布局稳定性 */
	flex-wrap: nowrap;
	min-height: 40px;
}

.home-button {
	border: none;
	background: none;
	padding: 0;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	/* 确保位置稳定 */
	flex-shrink: 0;
	align-self: flex-start;
}
.main-content {
	margin-left: calc(var(--sidebar-width) + 20px);
	margin-right: 120px;
	min-height: 100vh;
	padding: 20px 20px 20px 60px;
	flex: 1;
	box-sizing: border-box;
	transition:
		margin-left var(--duration-short) var(--ease-in-out-cubic),
		padding var(--duration-short) var(--ease-in-out-cubic);
	position: relative;
	z-index: 2;
	overflow-y: auto;
	/* 完全隐藏滚动条 */
	scrollbar-width: none;
	-ms-overflow-style: none;
}

/* 隐藏主内容区滚动条 */
.main-content::-webkit-scrollbar {
	display: none;
}

/* 小于1024px时默认调整主内容区 */
@media screen and (max-width: 1023px) {
	.main-content {
		margin-left: 120px;
		margin-right: 120px;
		padding: 20px;
	}
}

.sidebar.collapsed + .main-content {
	margin-left: 120px;
	margin-right: 120px;
	padding: 20px;
}