/* Research Publisher — front end
   All colours are custom properties so a theme can restyle without forking. */

.rp-library,
.rp-single,
.rp-archive {
	--rp-ink: #12202b;
	--rp-body: #37444f;
	--rp-muted: #7c868f;
	--rp-rule: #e2e6ea;
	--rp-paper: #ffffff;
	--rp-soft: #f6f7f8;
	--rp-accent: #1b6f63;
	--rp-gold: #bc8a2e;
	--rp-warn: #b24a2e;
	--rp-radius: 4px;
	color: var(--rp-body);
}

/* ------------------------------------------------------------- buttons */

.rp-btn {
	display: inline-block;
	padding: 8px 16px;
	border: 1px solid var(--rp-ink);
	border-radius: var(--rp-radius);
	background: transparent;
	color: var(--rp-ink);
	font-size: 14px;
	line-height: 1.3;
	font-weight: 600;
	text-decoration: none;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease;
}

.rp-btn:hover,
.rp-btn:focus {
	background: var(--rp-ink);
	color: #fff;
}

.rp-btn-solid {
	background: var(--rp-ink);
	color: #fff;
}

.rp-btn-solid:hover,
.rp-btn-solid:focus {
	background: var(--rp-accent);
	border-color: var(--rp-accent);
	color: #fff;
}

.rp-btn-ghost {
	border-color: rgba(255, 255, 255, 0.5);
	color: #fff;
}

.rp-btn-ghost:hover {
	background: #fff;
	color: var(--rp-ink);
}

.rp-btn-small {
	padding: 4px 10px;
	font-size: 13px;
}

/* --------------------------------------------------------------- chips */

.rp-chip {
	display: inline-block;
	padding: 2px 7px;
	border-radius: 3px;
	background: var(--rp-soft);
	border: 1px solid var(--rp-rule);
	color: var(--rp-muted);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.08em;
}

.rp-chip-pdf {
	background: #fbeeea;
	border-color: #e8cfc6;
	color: var(--rp-warn);
}

.rp-chip-xlsx,
.rp-chip-xls,
.rp-chip-csv,
.rp-chip-xlsm,
.rp-chip-tsv {
	background: #e9f2f0;
	border-color: #c2ded8;
	color: var(--rp-accent);
}

.rp-chip-zip,
.rp-chip-py,
.rp-chip-r,
.rp-chip-ipynb {
	background: #fbf4e6;
	border-color: #e6d5ae;
	color: #96690f;
}

.rp-badge-free {
	position: absolute;
	top: 10px;
	left: 10px;
	padding: 3px 9px;
	border-radius: 999px;
	background: var(--rp-accent);
	color: #fff;
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.rp-badge-inline {
	position: static;
	display: inline-block;
}

/* ------------------------------------------------------------- filters */

.rp-filters {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
	margin-bottom: 26px;
	padding-bottom: 18px;
	border-bottom: 1px solid var(--rp-rule);
}

.rp-filters input[type="search"],
.rp-filters select {
	padding: 8px 12px;
	border: 1px solid var(--rp-rule);
	border-radius: var(--rp-radius);
	background: #fff;
	font-size: 14px;
	min-width: 220px;
}

.rp-free-note {
	margin-left: auto;
	color: var(--rp-accent);
	font-size: 13px;
	font-weight: 600;
}

/* ---------------------------------------------------------------- grid */

.rp-grid {
	display: grid;
	gap: 28px;
}

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

@media (max-width: 900px) {
	.rp-cols-3,
	.rp-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
	.rp-cols-2,
	.rp-cols-3,
	.rp-cols-4 { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------------- card */

.rp-card {
	display: flex;
	flex-direction: column;
	background: var(--rp-paper);
	border: 1px solid var(--rp-rule);
	border-radius: var(--rp-radius);
	overflow: hidden;
}

.rp-card-cover {
	position: relative;
	display: block;
	background: var(--rp-soft);
	border-bottom: 1px solid var(--rp-rule);
	text-decoration: none;
}

.rp-cover {
	position: relative;
	display: block;
	aspect-ratio: 1 / 1.414;
	overflow: hidden;
	background: var(--rp-soft);
}

.rp-cover img,
.rp-cover canvas {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: top center;
}

.rp-cover-loading {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--rp-muted);
	font-size: 12px;
}

.rp-cover-blank {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
	text-align: center;
	color: var(--rp-muted);
	font-size: 14px;
}

.rp-card-body {
	display: flex;
	flex: 1;
	flex-direction: column;
	padding: 18px;
}

.rp-card-ref {
	color: var(--rp-gold);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.16em;
	text-transform: uppercase;
}

.rp-card-title {
	margin: 6px 0 8px;
	font-size: 18px;
	line-height: 1.25;
}

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

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

.rp-card-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 4px 12px;
	color: var(--rp-muted);
	font-size: 12.5px;
}

.rp-card-excerpt {
	margin: 10px 0 0;
	font-size: 14px;
	line-height: 1.55;
}

.rp-card-files {
	display: flex;
	flex-wrap: wrap;
	gap: 5px;
	margin-top: 14px;
}

.rp-card-foot {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	margin-top: auto;
	padding-top: 16px;
}

.rp-downloads-count {
	color: var(--rp-muted);
	font-size: 12px;
}

/* -------------------------------------------------------------- single */

.rp-single {
	max-width: 1100px;
	margin: 0 auto;
	padding: 32px 20px 64px;
}

.rp-hero {
	display: grid;
	grid-template-columns: 300px 1fr;
	gap: 40px;
	padding-bottom: 32px;
	border-bottom: 2px solid var(--rp-ink);
}

@media (max-width: 800px) {
	.rp-hero { grid-template-columns: 1fr; gap: 24px; }
	.rp-hero-cover { max-width: 260px; }
}

.rp-hero-cover .rp-cover {
	border: 1px solid var(--rp-rule);
	box-shadow: 0 12px 32px rgba(18, 32, 43, 0.12);
}

.rp-hero-cover-actions {
	margin-top: 14px;
	text-align: center;
}

.rp-hero-top {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 12px;
}

.rp-hero-ref {
	color: var(--rp-muted);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

.rp-hero-title {
	margin: 0 0 12px;
	color: var(--rp-ink);
	font-size: 36px;
	line-height: 1.12;
}

.rp-hero-lede {
	margin: 0 0 20px;
	font-size: 17px;
	line-height: 1.5;
	color: var(--rp-body);
}

.rp-facts {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
	gap: 14px 24px;
	margin: 0 0 20px;
	padding: 18px 0;
	border-top: 1px solid var(--rp-rule);
	border-bottom: 1px solid var(--rp-rule);
}

.rp-fact dt {
	color: var(--rp-muted);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.rp-fact dd {
	margin: 4px 0 0;
	color: var(--rp-ink);
	font-size: 14.5px;
}

.rp-free-banner {
	margin: 0;
	padding: 12px 16px;
	border-left: 3px solid var(--rp-accent);
	background: #f1f7f5;
	color: #17564d;
	font-size: 14px;
}

.rp-provenance {
	margin-top: 32px;
	padding: 20px 24px;
	border-left: 3px solid var(--rp-gold);
	background: #fcf8f1;
}

.rp-provenance h2 {
	margin: 0 0 8px;
	color: #8a6417;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.2em;
	text-transform: uppercase;
}

.rp-provenance p {
	margin: 0;
	font-size: 14.5px;
	line-height: 1.6;
}

.rp-outputs,
.rp-contact,
.rp-related,
.rp-content {
	margin-top: 44px;
}

.rp-outputs h2,
.rp-contact h2,
.rp-related h2 {
	margin: 0 0 18px;
	padding-bottom: 10px;
	border-bottom: 1px solid var(--rp-rule);
	color: var(--rp-ink);
	font-size: 20px;
}

/* --------------------------------------------------------------- files */

.rp-files {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.rp-file {
	display: grid;
	grid-template-columns: 58px 1fr auto;
	gap: 18px;
	align-items: center;
	padding: 16px 18px;
	border: 1px solid var(--rp-rule);
	border-radius: var(--rp-radius);
	background: var(--rp-paper);
}

@media (max-width: 700px) {
	.rp-file { grid-template-columns: 44px 1fr; }
	.rp-file-actions { grid-column: 1 / -1; }
}

.rp-file-icon {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 58px;
	border-radius: var(--rp-radius);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.06em;
}

.rp-file-role {
	color: var(--rp-muted);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

.rp-file-label {
	margin: 3px 0 0;
	color: var(--rp-ink);
	font-size: 16px;
	line-height: 1.3;
}

.rp-file-desc {
	margin: 5px 0 0;
	font-size: 13.5px;
	line-height: 1.5;
}

.rp-file-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 4px 14px;
	margin-top: 7px;
	color: var(--rp-muted);
	font-size: 12px;
}

.rp-file-free {
	color: var(--rp-accent);
	font-weight: 700;
}

.rp-file-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

/* ------------------------------------------------------------- contact */

.rp-contact-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 28px;
}

@media (max-width: 700px) {
	.rp-contact-grid { grid-template-columns: 1fr; }
}

.rp-contact-name {
	color: var(--rp-ink);
	font-size: 17px;
	font-weight: 700;
}

.rp-contact-role,
.rp-contact-address {
	margin-top: 4px;
	color: var(--rp-muted);
	font-size: 14px;
	line-height: 1.5;
}

.rp-contact-links div {
	padding: 7px 0;
	border-bottom: 1px solid var(--rp-rule);
	font-size: 14px;
}

.rp-contact-links span {
	display: inline-block;
	width: 90px;
	color: var(--rp-muted);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}

/* --------------------------------------------------------------- stats */

.rp-stats {
	display: flex;
	flex-wrap: wrap;
	gap: 32px;
	margin: 22px 0;
	padding: 18px 0;
	border-top: 2px solid var(--rp-ink);
	border-bottom: 1px solid var(--rp-rule);
}

.rp-stat-v {
	color: var(--rp-ink);
	font-size: 30px;
	font-weight: 700;
	line-height: 1;
}

.rp-stat-k {
	margin-top: 6px;
	color: var(--rp-muted);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.16em;
	text-transform: uppercase;
}

/* ------------------------------------------------------------- archive */

.rp-archive {
	max-width: 1180px;
	margin: 0 auto;
	padding: 32px 20px 64px;
}

.rp-archive-kicker {
	color: var(--rp-gold);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.24em;
	text-transform: uppercase;
}

.rp-archive-title {
	margin: 8px 0 10px;
	color: var(--rp-ink);
	font-size: 38px;
	line-height: 1.1;
}

.rp-archive-desc {
	max-width: 640px;
	font-size: 16px;
	line-height: 1.55;
}

.rp-pagination {
	display: flex;
	justify-content: center;
	gap: 6px;
	margin-top: 36px;
}

.rp-pagination .page-numbers {
	padding: 7px 13px;
	border: 1px solid var(--rp-rule);
	border-radius: var(--rp-radius);
	color: var(--rp-ink);
	text-decoration: none;
	font-size: 14px;
}

.rp-pagination .current {
	background: var(--rp-ink);
	border-color: var(--rp-ink);
	color: #fff;
}

.rp-empty {
	padding: 40px;
	text-align: center;
	color: var(--rp-muted);
}

/* --------------------------------------------------------------- modal */

body.rp-modal-open {
	overflow: hidden;
}

.rp-modal {
	position: fixed;
	inset: 0;
	z-index: 100000;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
}

.rp-modal[hidden] {
	display: none;
}

.rp-modal-backdrop {
	position: absolute;
	inset: 0;
	background: rgba(10, 18, 25, 0.72);
}

.rp-modal-panel {
	position: relative;
	display: flex;
	flex-direction: column;
	width: min(1080px, 100%);
	height: min(92vh, 1000px);
	border-radius: 6px;
	background: #fff;
	overflow: hidden;
	box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.rp-modal-head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	padding: 14px 18px;
	background: #12202b;
	color: #fff;
}

.rp-modal-kicker {
	display: block;
	color: #9fb0bc;
	font-size: 9.5px;
	font-weight: 700;
	letter-spacing: 0.2em;
	text-transform: uppercase;
}

.rp-modal-title {
	margin: 3px 0 0;
	color: #fff;
	font-size: 17px;
	line-height: 1.25;
}

.rp-modal-actions {
	display: flex;
	align-items: center;
	gap: 10px;
}

.rp-modal-close {
	border: 0;
	background: transparent;
	color: #fff;
	font-size: 26px;
	line-height: 1;
	cursor: pointer;
	padding: 0 4px;
}

.rp-modal-toolbar {
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 8px 18px;
	border-bottom: 1px solid var(--rp-rule, #e2e6ea);
	background: #f6f7f8;
	font-size: 13px;
}

.rp-modal-toolbar[hidden] {
	display: none;
}

.rp-toolbar-sep {
	width: 1px;
	height: 18px;
	margin: 0 6px;
	background: #d7dde2;
}

.rp-toolbar-label,
.rp-sheet-note {
	color: #7c868f;
	font-size: 11.5px;
}

.rp-sheet-note {
	margin-left: auto;
}

.rp-modal-toolbar select {
	padding: 4px 8px;
	border: 1px solid #d7dde2;
	border-radius: 3px;
	font-size: 13px;
}

.rp-modal-body {
	flex: 1;
	overflow: auto;
	background: #eef1f3;
}

.rp-modal-status {
	display: none;
	padding: 40px;
	text-align: center;
	color: #7c868f;
	font-size: 14px;
}

.rp-pdf-stage {
	display: flex;
	justify-content: center;
	padding: 20px;
}

.rp-pdf-stage[hidden],
.rp-sheet-stage[hidden] {
	display: none;
}

.rp-pdf-canvas {
	background: #fff;
	box-shadow: 0 6px 20px rgba(18, 32, 43, 0.18);
	max-width: 100%;
	height: auto;
}

.rp-sheet-stage {
	padding: 0;
	background: #fff;
}

.rp-sheet-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 12.5px;
}

.rp-sheet-table th {
	position: sticky;
	top: 0;
	z-index: 1;
	padding: 8px 10px;
	background: #12202b;
	color: #fff;
	text-align: left;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.04em;
	white-space: nowrap;
}

.rp-sheet-table td {
	padding: 6px 10px;
	border-bottom: 1px solid #eceff1;
	white-space: nowrap;
}

.rp-sheet-table tr:nth-child(even) td {
	background: #fafbfb;
}

.rp-sheet-table td.rp-num {
	text-align: right;
	font-variant-numeric: tabular-nums;
}