/* ==========================================================================
   Nexus Publications – Archive Grid
   ========================================================================== */

/* ── Design tokens ─────────────────────────────────────────────────────── */
.npub-archive-wrap {
	--npub-primary:       #1e40af;
	--npub-primary-dark:  #1e3a8a;
	--npub-accent:        #3b82f6;
	--npub-text:          #0f172a;
	--npub-text-muted:    #64748b;
	--npub-text-light:    #94a3b8;
	--npub-bg:            #f8fafc;
	--npub-card-bg:       #ffffff;
	--npub-border:        #e2e8f0;
	--npub-radius:        16px;
	--npub-radius-sm:     8px;
	--npub-shadow:        0 1px 4px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
	--npub-shadow-hover:  0 8px 32px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
	--npub-transition:    0.22s ease;

	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
	color: var(--npub-text);
}

/* ── Toolbar ───────────────────────────────────────────────────────────── */
.npub-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 12px;
	margin-bottom: 28px;
	padding: 18px 20px;
	background: #fff;
	border: 1px solid var(--npub-border);
	border-radius: var(--npub-radius);
	box-shadow: var(--npub-shadow);
}

.npub-search-wrap {
	position: relative;
	flex: 1;
	min-width: 220px;
}

.npub-search-icon {
	position: absolute;
	left: 14px;
	top: 50%;
	transform: translateY(-50%);
	color: var(--npub-text-light);
	pointer-events: none;
}

.npub-search-input {
	width: 100%;
	padding: 10px 14px 10px 42px;
	border: 1.5px solid var(--npub-border);
	border-radius: var(--npub-radius-sm);
	font-size: 0.9rem;
	color: var(--npub-text);
	background: var(--npub-bg);
	transition: border-color var(--npub-transition), box-shadow var(--npub-transition);
	box-sizing: border-box;
}

.npub-search-input:focus {
	outline: none;
	border-color: var(--npub-accent);
	box-shadow: 0 0 0 3px rgba(59,130,246,.15);
	background: #fff;
}

.npub-filters {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
}

.npub-select {
	padding: 9px 32px 9px 14px;
	border: 1.5px solid var(--npub-border);
	border-radius: var(--npub-radius-sm);
	font-size: 0.875rem;
	color: var(--npub-text);
	background-color: var(--npub-bg);
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 10px center;
	background-size: 16px;
	appearance: none;
	-webkit-appearance: none;
	cursor: pointer;
	transition: border-color var(--npub-transition);
}

.npub-select:focus {
	outline: none;
	border-color: var(--npub-accent);
	box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

/* ── Meta bar ──────────────────────────────────────────────────────────── */
.npub-meta-bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 16px;
}

.npub-result-count {
	font-size: 0.83rem;
	color: var(--npub-text-muted);
	font-weight: 500;
}

/* ── Publication Grid ──────────────────────────────────────────────────── */
.npub-grid {
	display: grid;
	gap: 24px;
}

.npub-grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.npub-grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.npub-grid--cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1100px) {
	.npub-grid--cols-4 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
	.npub-grid--cols-3,
	.npub-grid--cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
	.npub-grid--cols-2,
	.npub-grid--cols-3,
	.npub-grid--cols-4 { grid-template-columns: 1fr; }
	.npub-toolbar { flex-direction: column; align-items: stretch; }
	.npub-search-wrap { min-width: 0; }
	.npub-filters { flex-direction: column; }
	.npub-select { width: 100%; }
}

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

.npub-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--npub-shadow-hover);
	border-color: rgba(59,130,246,.2);
}

.npub-card-link {
	display: flex;
	flex-direction: column;
	flex: 1;
	text-decoration: none;
	color: inherit;
}

/* Cover image: 3:4 academic journal ratio */
.npub-card-cover {
	position: relative;
	aspect-ratio: 3 / 4;
	overflow: hidden;
	background: linear-gradient(145deg, #e8f0fe 0%, #c7d9fd 100%);
}

.npub-card-cover img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--npub-transition);
}

.npub-card:hover .npub-card-cover img {
	transform: scale(1.04);
}

.npub-card-cover-placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	color: #93b4ef;
}

/* Publication type badge on cover */
.npub-type-badge {
	position: absolute;
	top: 12px;
	left: 12px;
	padding: 4px 10px;
	border-radius: 20px;
	font-size: 0.7rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	z-index: 2;
}

/* Type-specific badge colors */
.npub-type-badge--journal     { background: rgba(30,64,175,.85);  color: #fff; }
.npub-type-badge--magazine    { background: rgba(124,58,237,.85); color: #fff; }
.npub-type-badge--newsletter  { background: rgba(5,150,105,.85);  color: #fff; }
.npub-type-badge--research    { background: rgba(234,88,12,.85);  color: #fff; }
.npub-type-badge--official    { background: rgba(15,118,110,.85); color: #fff; }
.npub-type-badge--guideline   { background: rgba(14,116,144,.85); color: #fff; }
.npub-type-badge--case_report { background: rgba(190,18,60,.85);  color: #fff; }
.npub-type-badge--hero        { background: rgba(0,0,0,.55);      color: #fff; }

/* Lock overlay for non-members */
.npub-card-lock-overlay {
	position: absolute;
	inset: 0;
	background: rgba(15,23,42,.4);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 3;
	color: #fff;
	opacity: 0;
	transition: opacity var(--npub-transition);
}

.npub-card:hover .npub-card-lock-overlay {
	opacity: 1;
}

/* Card body */
.npub-card-body {
	padding: 18px;
	display: flex;
	flex-direction: column;
	flex: 1;
	gap: 8px;
}

.npub-card-title {
	font-size: 0.98rem;
	font-weight: 700;
	color: var(--npub-text);
	margin: 0;
	line-height: 1.45;
	display: -webkit-box;
	-webkit-line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.npub-card-author {
	display: flex;
	align-items: center;
	gap: 6px;
	font-size: 0.82rem;
	color: var(--npub-primary);
	font-weight: 600;
	margin: 0;
}

.npub-card-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.npub-card-vol,
.npub-card-date {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	font-size: 0.78rem;
	color: var(--npub-text-muted);
	background: var(--npub-bg);
	border: 1px solid var(--npub-border);
	border-radius: 4px;
	padding: 2px 8px;
}

.npub-card-excerpt {
	font-size: 0.83rem;
	color: var(--npub-text-muted);
	line-height: 1.55;
	margin: 0;
	flex: 1;
	display: -webkit-box;
	-webkit-line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.npub-card-footer {
	margin-top: auto;
	padding-top: 8px;
	border-top: 1px solid var(--npub-border);
}

/* CTA button inside card */
.npub-cta-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	background: var(--npub-primary);
	color: #fff;
	padding: 8px 16px;
	border-radius: var(--npub-radius-sm);
	font-size: 0.82rem;
	font-weight: 700;
	letter-spacing: 0.02em;
	transition: background var(--npub-transition), transform var(--npub-transition);
}

.npub-card:hover .npub-cta-btn {
	background: var(--npub-primary-dark);
}

.npub-cta-btn--locked {
	background: #475569;
}

.npub-card:hover .npub-cta-btn--locked {
	background: #334155;
}

/* ── Pagination ────────────────────────────────────────────────────────── */
.npub-pagination {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	margin-top: 40px;
	flex-wrap: wrap;
}

.npub-page-btn,
.npub-page-num {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 36px;
	height: 36px;
	padding: 0 4px;
	border: 1.5px solid var(--npub-border);
	border-radius: var(--npub-radius-sm);
	background: #fff;
	color: var(--npub-text);
	font-size: 0.875rem;
	font-weight: 500;
	cursor: pointer;
	transition: all var(--npub-transition);
	font-family: inherit;
}

.npub-page-btn:hover,
.npub-page-num:hover {
	border-color: var(--npub-accent);
	color: var(--npub-accent);
	background: rgba(59,130,246,.06);
}

.npub-page-num.is-active {
	background: var(--npub-primary);
	border-color: var(--npub-primary);
	color: #fff;
	font-weight: 700;
}

.npub-page-ellipsis {
	color: var(--npub-text-muted);
	padding: 0 4px;
	line-height: 36px;
}

/* ── Empty / Loading states ────────────────────────────────────────────── */
.npub-empty-state {
	text-align: center;
	padding: 72px 24px;
	color: var(--npub-text-muted);
}

.npub-empty-icon {
	margin: 0 auto 20px;
	width: 80px;
	height: 80px;
	background: var(--npub-bg);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--npub-text-light);
}

.npub-empty-state p {
	font-size: 1rem;
	margin: 0;
}

.npub-results--loading {
	opacity: 0.5;
	pointer-events: none;
}

.npub-results-loading-bar {
	height: 3px;
	background: linear-gradient(90deg, var(--npub-primary) 0%, var(--npub-accent) 50%, var(--npub-primary) 100%);
	background-size: 200% 100%;
	animation: npub-loading-bar 1.2s linear infinite;
	border-radius: 2px;
	margin-bottom: 20px;
}

@keyframes npub-loading-bar {
	0%   { background-position: 200% 0; }
	100% { background-position: -200% 0; }
}

/* ── Error state ───────────────────────────────────────────────────────── */
.npub-error-state {
	padding: 40px 24px;
	text-align: center;
	background: #fff1f2;
	border: 1px solid #fecdd3;
	border-radius: var(--npub-radius);
	color: #be123c;
}