/* Digital ePaper Manager — Public Styles */

:root {
	--dem-primary: #1a4d8f;
	--dem-primary-dark: #123863;
	--dem-accent: #c0392b;
	--dem-text: #1f2328;
	--dem-muted: #6b7280;
	--dem-border: #e5e7eb;
	--dem-bg-card: #ffffff;
	--dem-bg-page: #f7f8fa;
	--dem-radius: 10px;
	--dem-shadow: 0 2px 10px rgba(20, 30, 60, 0.08);
	--dem-shadow-hover: 0 10px 24px rgba(20, 30, 60, 0.14);
}

.dem-archive-wrap,
.dem-viewer-wrap,
.dem-latest-grid {
	box-sizing: border-box;
	color: var(--dem-text);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.dem-archive-wrap *,
.dem-viewer-wrap *,
.dem-latest-grid * {
	box-sizing: border-box;
}

.dem-empty {
	padding: 40px 20px;
	text-align: center;
	color: var(--dem-muted);
	grid-column: 1 / -1;
}

/* Filter bar */
.dem-filter-bar {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-end;
	gap: 14px;
	background: var(--dem-bg-card);
	border: 1px solid var(--dem-border);
	border-radius: var(--dem-radius);
	padding: 18px;
	margin-bottom: 28px;
	box-shadow: var(--dem-shadow);
}

.dem-filter-field {
	display: flex;
	flex-direction: column;
	gap: 6px;
	min-width: 160px;
}

.dem-filter-search {
	flex: 1 1 220px;
}

.dem-filter-field label {
	font-size: 12px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--dem-muted);
}

.dem-filter-input {
	padding: 10px 12px;
	border: 1px solid var(--dem-border);
	border-radius: 6px;
	font-size: 14px;
	background: #fff;
	color: var(--dem-text);
	width: 100%;
}

.dem-filter-input:focus {
	outline: none;
	border-color: var(--dem-primary);
	box-shadow: 0 0 0 3px rgba(26, 77, 143, 0.12);
}

.dem-filter-actions {
	display: flex;
	gap: 8px;
}

/* Buttons */
.dem-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	padding: 10px 18px;
	border-radius: 999px;
	font-size: 14px;
	font-weight: 600;
	text-decoration: none;
	border: 1px solid transparent;
	cursor: pointer;
	transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
	line-height: 1.2;
}

.dem-btn:hover {
	transform: translateY(-1px);
}

.dem-btn-primary {
	background: var(--dem-primary);
	color: #fff;
}

.dem-btn-primary:hover {
	background: var(--dem-primary-dark);
	color: #fff;
}

.dem-btn-secondary {
	background: #fff;
	color: var(--dem-primary);
	border-color: var(--dem-border);
}

.dem-btn-secondary:hover {
	background: #f0f4fa;
	color: var(--dem-primary-dark);
}

/* Archive grid */
.dem-archive-grid,
.dem-latest-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 24px;
}

@media (max-width: 1024px) {
	.dem-archive-grid,
	.dem-latest-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 560px) {
	.dem-archive-grid,
	.dem-latest-grid {
		grid-template-columns: 1fr;
	}
}

/* Card */
.dem-card {
	background: var(--dem-bg-card);
	border: 1px solid var(--dem-border);
	border-radius: var(--dem-radius);
	overflow: hidden;
	box-shadow: var(--dem-shadow);
	transition: box-shadow 0.2s ease, transform 0.2s ease;
	display: flex;
	flex-direction: column;
}

.dem-card:hover {
	box-shadow: var(--dem-shadow-hover);
	transform: translateY(-3px);
}

.dem-card-thumb-link {
	display: block;
	text-decoration: none;
}

.dem-card-thumb {
	position: relative;
	width: 100%;
	aspect-ratio: 3 / 4;
	background: #eef1f6;
	overflow: hidden;
}

.dem-card-thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.dem-card-thumb-placeholder {
	width: 100%;
	height: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	color: var(--dem-muted);
	gap: 8px;
	background: linear-gradient(160deg, #eef1f6, #e2e7ef);
}

.dem-pdf-icon {
	font-size: 42px;
	line-height: 1;
}

.dem-pdf-icon-label {
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.08em;
}

.dem-date-badge {
	position: absolute;
	top: 10px;
	right: 10px;
	background: rgba(26, 77, 143, 0.92);
	color: #fff;
	font-size: 11px;
	font-weight: 600;
	padding: 4px 10px;
	border-radius: 999px;
	letter-spacing: 0.02em;
}

.dem-card-body {
	padding: 16px 18px 20px;
	display: flex;
	flex-direction: column;
	gap: 6px;
	flex: 1;
}

.dem-card-title {
	margin: 0;
	font-size: 17px;
	font-weight: 700;
	line-height: 1.3;
}

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

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

.dem-card-date {
	margin: 0;
	font-size: 13px;
	color: var(--dem-muted);
}

.dem-card-excerpt {
	margin: 4px 0 0;
	font-size: 13px;
	color: var(--dem-muted);
	line-height: 1.5;
}

.dem-read-btn {
	margin-top: 12px;
	align-self: flex-start;
}

/* Pagination */
.dem-pagination {
	margin-top: 32px;
	display: flex;
	justify-content: center;
}

.dem-pagination ul.page-numbers {
	list-style: none;
	display: flex;
	gap: 6px;
	padding: 0;
	margin: 0;
}

.dem-pagination .page-numbers li a,
.dem-pagination .page-numbers li span {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 38px;
	height: 38px;
	padding: 0 10px;
	border-radius: 8px;
	border: 1px solid var(--dem-border);
	color: var(--dem-text);
	text-decoration: none;
	font-size: 14px;
}

.dem-pagination .page-numbers li .current {
	background: var(--dem-primary);
	border-color: var(--dem-primary);
	color: #fff;
}

.dem-pagination .page-numbers li a:hover {
	border-color: var(--dem-primary);
	color: var(--dem-primary);
}

/* Viewer */
.dem-viewer-wrap {
	max-width: 1000px;
	margin: 0 auto;
	padding: 24px 16px 60px;
}

.dem-viewer-breadcrumb {
	margin-bottom: 16px;
}

.dem-viewer-breadcrumb a {
	color: var(--dem-primary);
	text-decoration: none;
	font-weight: 600;
	font-size: 14px;
}

.dem-viewer-header {
	text-align: center;
	margin-bottom: 20px;
}

.dem-viewer-title {
	font-size: 28px;
	font-weight: 800;
	margin: 0 0 4px;
}

.dem-viewer-date {
	margin: 0 0 18px;
	color: var(--dem-muted);
	font-size: 15px;
}

.dem-viewer-toolbar {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 10px;
}

.dem-pdf-viewer-container {
	--dem-viewer-height: 800px;
	position: relative;
	width: 100%;
	height: var(--dem-viewer-height);
	max-height: 85vh;
	background: #2b2f36;
	border-radius: var(--dem-radius);
	overflow: hidden;
	box-shadow: var(--dem-shadow);
	margin-top: 20px;
}

.dem-pdf-frame {
	width: 100%;
	height: 100%;
	border: 0;
	display: block;
	background: #fff;
}

.dem-pdf-viewer-container:fullscreen .dem-pdf-frame,
.dem-pdf-viewer-container:-webkit-full-screen .dem-pdf-frame {
	height: 100vh;
}

.dem-mobile-fallback-note {
	text-align: center;
	font-size: 12px;
	color: var(--dem-muted);
	margin-top: 10px;
}

.dem-noscript-fallback {
	text-align: center;
	padding: 40px;
}

/* Prev/Next navigation */
.dem-issue-nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-top: 32px;
	padding-top: 20px;
	border-top: 1px solid var(--dem-border);
	flex-wrap: wrap;
}

.dem-issue-nav a {
	text-decoration: none;
	color: var(--dem-primary);
	font-weight: 600;
	font-size: 14px;
	display: flex;
	flex-direction: column;
	gap: 2px;
}

.dem-issue-nav-next a {
	text-align: right;
	align-items: flex-end;
}

.dem-issue-nav-meta {
	display: block;
	font-weight: 400;
	font-size: 12px;
	color: var(--dem-muted);
}

.dem-issue-nav-archive a {
	color: var(--dem-text);
}

@media (max-width: 640px) {
	.dem-viewer-title {
		font-size: 22px;
	}

	.dem-pdf-viewer-container {
		height: 70vh;
		max-height: none;
	}

	.dem-issue-nav {
		flex-direction: column;
		align-items: stretch;
	}

	.dem-issue-nav-next a {
		text-align: left;
		align-items: flex-start;
	}
}

/* Dark mode support (respects visitor's OS setting) */
@media (prefers-color-scheme: dark) {
	.dem-archive-wrap,
	.dem-viewer-wrap {
		--dem-text: #e6e8eb;
		--dem-muted: #9aa2ab;
		--dem-border: #2c313a;
		--dem-bg-card: #1b1f27;
		--dem-bg-page: #12151b;
	}

	.dem-filter-input {
		background: #12151b;
		color: var(--dem-text);
	}

	.dem-btn-secondary {
		background: #1b1f27;
	}

	.dem-btn-secondary:hover {
		background: #232935;
	}
}