* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root {
	--bg-base: #edf1f4;
	--bg-card: #ffffff;
	--text-primary: #061618;
	--text-secondary: #6b7280;
	--link-color: #2c5766;
	--border-color: #e5e7eb;
	--tag-bg: #f3f4f6;
	--tag-active-bg: #2c5766;
	--tag-active-text: #ffffff;
}

/* Hide scrollbar */
::-webkit-scrollbar {
	display: none;
}

html {
	scrollbar-width: none;
}

body {
	font-family:
		-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
		sans-serif;
	background-color: var(--bg-base);
	color: var(--text-primary);
	line-height: 1.6;
}

.container {
	display: flex;
	min-height: 100vh;
}

/* Sidebar */
.sidebar {
	width: 280px;
	padding: 2rem 1.5rem;
	position: fixed;
	height: 100vh;
	overflow-y: auto;
	background-color: var(--bg-base);
}

.header-title {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	margin-bottom: 0.25rem;
}

.sidebar h1 {
	font-size: 1.5rem;
	font-weight: 700;
	cursor: pointer;
}

.sidebar h1:hover {
	color: var(--link-color);
}

.total-count {
	font-size: 0.75rem;
	font-weight: 500;
	color: var(--text-secondary);
	background: var(--tag-bg);
	padding: 0.25rem 0.5rem;
	border-radius: 1rem;
}

.subtitle {
	color: var(--text-secondary);
	font-size: 0.875rem;
	margin-bottom: 1.5rem;
}

.search-box {
	margin-bottom: 1.5rem;
}

.search-box input {
	width: 100%;
	padding: 0.625rem 0.875rem;
	font-size: 0.875rem;
	border: 1px solid var(--border-color);
	border-radius: 0.375rem;
	background: var(--bg-card);
	outline: none;
	transition:
		border-color 0.2s,
		box-shadow 0.2s;
}

.search-box input:focus {
	border-color: var(--link-color);
	box-shadow: 0 0 0 3px rgba(44, 87, 102, 0.1);
}

.tags-section h3 {
	font-size: 0.75rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--text-secondary);
	margin-bottom: 0.75rem;
}

.tags-filter {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.tag-btn {
	padding: 0.375rem 0.75rem;
	font-size: 0.8125rem;
	border: none;
	border-radius: 0.25rem;
	background: var(--tag-bg);
	color: var(--text-primary);
	cursor: pointer;
	transition: all 0.15s;
}

.tag-btn:hover {
	background: #e5e7eb;
}

.tag-btn.active {
	background: var(--tag-active-bg);
	color: var(--tag-active-text);
}

.tag-count {
	color: var(--text-secondary);
	margin-left: 0.25rem;
}

.tag-btn.active .tag-count {
	color: rgba(255, 255, 255, 0.7);
}

/* Main content */
.main-content {
	flex: 1;
	margin-left: 280px;
	padding: 2rem;
}

/* Cards */
.cards-grid {
	display: flex;
	flex-direction: column;
	gap: 1px;
	background: var(--border-color);
	border-radius: 0.5rem;
	overflow: hidden;
}

.card {
	background: var(--bg-card);
	padding: 1.25rem 1.5rem;
	transition: background-color 0.15s;
}

.card:hover {
	background: #fafbfc;
}

.card-header {
	display: flex;
	align-items: flex-start;
	gap: 1rem;
	margin-bottom: 0.5rem;
}

.card-cover {
	width: 72px;
	height: 72px;
	border-radius: 0.5rem;
	object-fit: cover;
	object-position: left;
	flex-shrink: 0;
}

.card-cover-placeholder {
	width: 72px;
	height: 72px;
	border-radius: 0.5rem;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	display: flex;
	align-items: center;
	justify-content: center;
	color: white;
	font-size: 1.5rem;
	font-weight: 600;
	flex-shrink: 0;
}

.card-title-section {
	flex: 1;
	min-width: 0;
}

.card-title {
	font-size: 1rem;
	font-weight: 600;
	margin-bottom: 0.125rem;
	line-height: 1.4;
}

.card-title a {
	color: var(--text-primary);
	text-decoration: none;
}

.card-title a:hover {
	color: var(--link-color);
}

.card-domain {
	font-size: 0.8125rem;
	color: var(--text-secondary);
	text-decoration: none;
	display: block;
}

.card-domain:hover {
	color: var(--link-color);
	text-decoration: underline;
}

.card-description {
	color: var(--text-secondary);
	font-size: 0.875rem;
	margin-top: 0.375rem;
	margin-bottom: 0;
	line-height: 1.5;
}

.card-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 0.375rem;
	margin-top: 0.75rem;
	margin-bottom: 0.75rem;
}

.card-tag {
	padding: 0.25rem 0.5rem;
	font-size: 0.75rem;
	background: var(--tag-bg);
	border-radius: 0.25rem;
	color: var(--text-secondary);
	cursor: pointer;
	transition: all 0.15s;
}

.card-tag:hover {
	background: #e5e7eb;
	color: var(--text-primary);
}

.card-tag.active {
	background: var(--tag-active-bg);
	color: var(--tag-active-text);
}

.card-note {
	font-size: 0.875rem;
	color: var(--text-primary);
	padding: 0.75rem;
	background: var(--bg-base);
	border-radius: 0.375rem;
	margin-bottom: 0.75rem;
	border-left: 3px solid var(--link-color);
}

.card-highlights {
	margin-top: 0.5rem;
}

.highlights-toggle {
	font-size: 0.8125rem;
	color: var(--link-color);
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	gap: 0.25rem;
}

.highlights-toggle:hover {
	text-decoration: underline;
}

.highlights-list {
	list-style: none;
	margin-top: 0.5rem;
	padding-left: 0;
	display: none;
}

.highlights-list.show {
	display: block;
}

.highlights-list li {
	font-size: 0.875rem;
	color: var(--text-secondary);
	padding: 0.25rem 0;
	padding-left: 1rem;
	position: relative;
}

.highlights-list li::before {
	content: "•";
	position: absolute;
	left: 0;
	color: var(--link-color);
}

/* Empty state */
.empty-state {
	text-align: center;
	padding: 4rem 2rem;
	color: var(--text-secondary);
	background: var(--bg-card);
	border-radius: 0.5rem;
}

/* Mobile */
@media (max-width: 768px) {
	.container {
		flex-direction: column;
	}

	.sidebar {
		position: static;
		width: 100%;
		height: auto;
		padding: 1.5rem 1rem;
	}

	.main-content {
		margin-left: 0;
		padding: 1rem;
	}
}