/**
 * Research Documentation Center (/research-library/) — route-scoped styles.
 *
 * Light, premium, documentation-first. Everything is scoped under `.pl-reslib` and
 * built on the global `--pl-*` design tokens (no hardcoded brand hex; cobalt = the
 * `--pl-blue` token). Depends on `polarlabs-main`. Presentation only.
 *
 * @package PolarLabs
 */

.pl-reslib { color: var(--pl-ink); }
.pl-reslib :where(h1, h2, h3) { text-wrap: balance; }

/* =============================================================== HERO */
.pl-reslib-hero {
	position: relative;
	overflow: hidden;
	background:
		radial-gradient(120% 140% at 82% 0%, var(--pl-blue-050) 0%, rgba(234, 240, 255, 0) 46%),
		var(--pl-surface-2);
	border-bottom: 1px solid var(--pl-line);
}
/* Subtle blueprint / polar-coordinate motif (decorative). */
.pl-reslib-hero__grid {
	position: absolute;
	inset: 0;
	pointer-events: none;
	background-image:
		repeating-radial-gradient(circle at 84% 30%, rgba(0, 78, 255, .05) 0 1px, transparent 1px 46px),
		linear-gradient(rgba(0, 78, 255, .035) 1px, transparent 1px),
		linear-gradient(90deg, rgba(0, 78, 255, .035) 1px, transparent 1px);
	background-size: 100% 100%, 44px 44px, 44px 44px;
	mask-image: linear-gradient(105deg, transparent 0%, #000 48%, #000 100%);
	-webkit-mask-image: linear-gradient(105deg, transparent 0%, #000 48%, #000 100%);
}
.pl-reslib-hero__inner {
	position: relative;
	display: grid;
	grid-template-columns: 1.04fr .96fr;
	align-items: center;
	gap: clamp(28px, 5vw, 64px);
	padding-block: clamp(48px, 7vw, 92px);
}
.pl-reslib-hero__copy { min-width: 0; }
.pl-reslib-hero__eyebrow { display: inline-block; margin-bottom: 12px; }
.pl-reslib-hero__title {
	font-family: var(--pl-font-heading);
	color: var(--pl-navy);
	font-size: clamp(2.1rem, 1.3rem + 3.4vw, 3.5rem);
	line-height: 1.06;
	letter-spacing: -.02em;
	margin: 0 0 18px;
}
.pl-reslib-hero__sub {
	color: var(--pl-muted);
	font-size: clamp(1.02rem, .98rem + .3vw, 1.18rem);
	line-height: 1.55;
	max-width: 46ch;
	margin: 0 0 32px;
}
.pl-reslib-hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; }
.pl-reslib-hero__link {
	display: inline-flex; align-items: center; gap: 8px;
	min-height: 44px;
	font-weight: 600; color: var(--pl-blue); text-decoration: none;
}
.pl-reslib-hero__link:hover { color: var(--pl-blue-600); text-decoration: underline; text-underline-offset: 3px; }
.pl-reslib-btnic { flex: 0 0 auto; }

/* COA preview card */
.pl-reslib-coacard {
	justify-self: end;
	width: 100%;
	max-width: 384px;
	background: var(--pl-surface);
	border: 1px solid var(--pl-line);
	border-radius: var(--pl-radius-lg);
	box-shadow: var(--pl-shadow-lg);
	padding: clamp(18px, 2.4vw, 24px);
}
.pl-reslib-coacard__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.pl-reslib-coacard__brand {
	font-family: var(--pl-font-heading); font-weight: 800; color: var(--pl-navy);
	letter-spacing: .01em; font-size: 1.02rem;
}
.pl-reslib-coacard__badge {
	display: inline-flex; align-items: center; gap: 6px;
	background: var(--pl-blue-050); color: var(--pl-blue-600);
	border-radius: var(--pl-radius-pill);
	padding: 6px 10px; font-size: .68rem; font-weight: 700;
	letter-spacing: .08em; text-transform: uppercase; white-space: nowrap;
}
.pl-reslib-coacard__label {
	margin: 16px 0 4px;
	font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
	color: var(--pl-muted-soft);
	padding-bottom: 12px; border-bottom: 1px solid var(--pl-line-strong);
}
.pl-reslib-coacard__rows { margin: 0; }
.pl-reslib-coacard__row {
	display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
	padding: 10px 0; border-bottom: 1px solid var(--pl-line);
}
.pl-reslib-coacard__row:last-child { border-bottom: 0; }
.pl-reslib-coacard__row dt { color: var(--pl-muted); font-size: .82rem; margin: 0; }
.pl-reslib-coacard__row dd {
	margin: 0; text-align: right; color: var(--pl-ink); font-weight: 600;
	font-size: .9rem; font-variant-numeric: tabular-nums;
}
/* Anchor the readout on the analyte identity (the Compound row), the way a real
   certificate leads with its subject. Applied ONLY to the first row's value — never the
   test-result line — so it is typographic emphasis, not a quality claim (RUO-safe). */
.pl-reslib-coacard__row:first-child dd { font-family: var(--pl-font-heading); color: var(--pl-navy); letter-spacing: -.01em; }
.pl-reslib-coacard__foot {
	margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--pl-line-strong);
	text-align: center; color: var(--pl-muted-soft);
	font-size: .68rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
}

/* =============================================================== START / CARDS */
.pl-reslib-start { background: var(--pl-surface); padding-block: clamp(44px, 6vw, 80px); }
.pl-reslib-start__head { max-width: 62ch; margin-bottom: clamp(24px, 3vw, 40px); }
.pl-reslib-start__title {
	font-family: var(--pl-font-heading); color: var(--pl-navy);
	font-size: clamp(1.55rem, 1.2rem + 1.6vw, 2.3rem);
	letter-spacing: -.015em; margin: 12px 0 10px;
}
.pl-reslib-start__sub { color: var(--pl-muted); font-size: 1.05rem; line-height: 1.55; margin: 0; }

.pl-reslib-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(16px, 2.2vw, 24px); }
.pl-reslib-card {
	min-width: 0;
	background: var(--pl-surface);
	border: 1px solid var(--pl-line);
	border-radius: var(--pl-radius-lg);
	padding: clamp(20px, 2.6vw, 30px);
	transition: transform .18s cubic-bezier(.23, 1, .32, 1), box-shadow .18s ease, border-color .18s ease;
}
.pl-reslib-card:hover { transform: translateY(-3px); box-shadow: var(--pl-shadow); border-color: var(--pl-line-strong); }
.pl-reslib-card__icon {
	display: inline-flex; align-items: center; justify-content: center;
	width: 48px; height: 48px; border-radius: var(--pl-radius-pill);
	background: var(--pl-blue-050); color: var(--pl-blue); margin-bottom: 16px;
}
.pl-reslib-card__title { font-family: var(--pl-font-heading); color: var(--pl-navy); font-size: 1.28rem; margin: 0 0 8px; }
.pl-reslib-card__text { color: var(--pl-muted); line-height: 1.5; margin: 0 0 12px; }
.pl-reslib-card__links { list-style: none; margin: 0; padding: 0; }
.pl-reslib-card__links li { border-top: 1px solid var(--pl-line); }
.pl-reslib-card__link {
	display: flex; align-items: center; justify-content: space-between; gap: 12px;
	min-height: 46px; padding: 8px 0; text-decoration: none;
	color: var(--pl-navy); font-weight: 600; font-size: .98rem;
}
.pl-reslib-card__link > span:first-child { min-width: 0; }
a.pl-reslib-card__link:hover { color: var(--pl-blue); }
.pl-reslib-card__chev { flex: 0 0 auto; color: var(--pl-blue); transition: transform .18s ease; }
a.pl-reslib-card__link:hover .pl-reslib-card__chev { transform: translateX(3px); }
.pl-reslib-card__link--soon { color: var(--pl-muted-soft); font-weight: 500; cursor: default; }
.pl-reslib-soon {
	flex: 0 0 auto;
	background: var(--pl-surface-3); color: var(--pl-muted-soft);
	border-radius: var(--pl-radius-pill); padding: 3px 9px;
	font-size: .64rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}

/* Topic chips */
.pl-reslib-topics { margin-top: clamp(28px, 3.5vw, 44px); }
.pl-reslib-topics__label {
	display: block; margin-bottom: 14px;
	font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
	color: var(--pl-muted-soft);
}
.pl-reslib-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.pl-reslib-chip {
	display: inline-flex; align-items: center; gap: 9px;
	min-height: 44px; padding: 9px 18px;
	background: var(--pl-surface); border: 1px solid var(--pl-line-strong);
	border-radius: var(--pl-radius-pill);
	color: var(--pl-navy); font-weight: 600; font-size: .92rem; text-decoration: none;
	transition: border-color .16s ease, background .16s ease, color .16s ease;
}
.pl-reslib-chip svg { color: var(--pl-blue); }
.pl-reslib-chip:hover { border-color: var(--pl-blue); background: var(--pl-blue-050); color: var(--pl-blue-600); }

/* =============================================================== VERIFICATION BAND (dark) */
.pl-reslib-verify {
	background: linear-gradient(118deg, var(--pl-navy-800) 0%, var(--pl-navy) 58%, var(--pl-navy-900) 100%);
	color: #fff;
	padding-block: clamp(32px, 4vw, 52px);
}
.pl-reslib-verify__inner { display: flex; align-items: center; gap: clamp(18px, 2.6vw, 32px); flex-wrap: wrap; }
.pl-reslib-verify__icon {
	display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
	width: 54px; height: 54px; border-radius: var(--pl-radius-pill);
	background: rgba(255, 255, 255, .08); color: #fff;
}
.pl-reslib-verify__copy { flex: 1 1 320px; min-width: 0; }
.pl-reslib-verify__title { color: #fff; font-family: var(--pl-font-heading); font-size: clamp(1.3rem, 1.1rem + 1vw, 1.7rem); margin: 0 0 6px; }
.pl-reslib-verify__body { color: rgba(255, 255, 255, .82); margin: 0; font-size: 1.02rem; line-height: 1.5; }
.pl-reslib-verify__btn { flex: 0 0 auto; }

/* =============================================================== FAQ */
.pl-reslib-faq { background: var(--pl-surface-2); padding-block: clamp(44px, 6vw, 76px); }
.pl-reslib-faq__inner { max-width: 840px; }
.pl-reslib-faq__title { font-family: var(--pl-font-heading); color: var(--pl-navy); font-size: clamp(1.4rem, 1.2rem + 1vw, 2rem); margin: 0 0 24px; }
.pl-reslib-faq__list { display: grid; gap: 12px; }
.pl-reslib-faq__item {
	background: var(--pl-surface); border: 1px solid var(--pl-line);
	border-radius: var(--pl-radius); overflow: hidden;
}
.pl-reslib-faq__q {
	display: flex; align-items: center; justify-content: space-between; gap: 16px;
	min-height: 44px; padding: 16px 20px; cursor: pointer;
	font-family: var(--pl-font-heading); font-weight: 600; color: var(--pl-navy); font-size: 1.02rem;
	list-style: none;
}
.pl-reslib-faq__q::-webkit-details-marker { display: none; }
.pl-reslib-faq__chev { flex: 0 0 auto; color: var(--pl-blue); transition: transform .2s ease; }
.pl-reslib-faq__item[open] .pl-reslib-faq__chev { transform: rotate(180deg); }
.pl-reslib-faq__a { padding: 0 20px 18px; }
.pl-reslib-faq__a p { color: var(--pl-muted); line-height: 1.6; margin: 0; }

/* =============================================================== FOOTER RUO NOTE */
.pl-reslib-ruo { background: var(--pl-surface); border-top: 1px solid var(--pl-line); padding-block: 20px; }
.pl-reslib-ruo p { margin: 0; text-align: center; color: var(--pl-muted-soft); font-size: .86rem; }

/* =============================================================== ARTICLE PAGE */
.pl-reslib-ahero {
	position: relative; overflow: hidden;
	background:
		radial-gradient(120% 160% at 90% -10%, var(--pl-blue-050) 0%, rgba(234, 240, 255, 0) 44%),
		var(--pl-surface-2);
	border-bottom: 1px solid var(--pl-line);
	padding-block: clamp(30px, 4.5vw, 56px);
}
.pl-reslib-ahero__crumb { margin-bottom: 16px; }
.pl-reslib-pill {
	display: inline-block; margin-bottom: 14px;
	background: var(--pl-blue-050); color: var(--pl-blue-600);
	border-radius: var(--pl-radius-pill); padding: 5px 12px;
	font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
}
.pl-reslib-ahero__title {
	font-family: var(--pl-font-heading); color: var(--pl-navy);
	font-size: clamp(1.9rem, 1.3rem + 2.4vw, 3rem); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 14px;
}
.pl-reslib-ahero__dek { color: var(--pl-muted); font-size: clamp(1.02rem, .98rem + .3vw, 1.16rem); line-height: 1.55; max-width: 62ch; margin: 0; }

.pl-reslib-abody { background: var(--pl-surface); padding-block: clamp(36px, 5vw, 68px); }
.pl-reslib-abody__grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: clamp(28px, 4vw, 56px); align-items: start; }
.pl-reslib-abody__main { min-width: 0; }

/* TL;DR callout (lives inside .pl-prose) */
.pl-reslib-tldr {
	background: var(--pl-blue-050);
	border: 1px solid var(--pl-line);
	border-left: 4px solid var(--pl-blue);
	border-radius: var(--pl-radius);
	padding: 18px 22px; margin: 0 0 28px;
}
.pl-reslib-tldr__h {
	margin: 0 0 8px; font-family: var(--pl-font-heading);
	font-size: .74rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--pl-blue-600);
}
.pl-reslib-tldr ul { margin: 0; padding-left: 20px; }
.pl-reslib-tldr li { color: var(--pl-ink); line-height: 1.5; margin: 5px 0; }

/* Responsive tables inside articles */
.pl-reslib-tablewrap { overflow-x: auto; margin: 22px 0; border: 1px solid var(--pl-line); border-radius: var(--pl-radius); }
.pl-reslib-tablewrap table { width: 100%; min-width: 460px; border-collapse: collapse; margin: 0; font-size: .94rem; }
.pl-reslib-tablewrap th, .pl-reslib-tablewrap td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--pl-line); vertical-align: top; }
.pl-reslib-tablewrap thead th { background: var(--pl-surface-2); color: var(--pl-navy); font-weight: 700; font-size: .82rem; letter-spacing: .02em; }
.pl-reslib-tablewrap tbody tr:last-child td { border-bottom: 0; }

/* Closing callout */
.pl-reslib-callout {
	display: flex; gap: 14px; align-items: flex-start;
	background: var(--pl-blue-050); border: 1px solid var(--pl-line); border-left: 4px solid var(--pl-blue);
	border-radius: var(--pl-radius); padding: 18px 22px; margin-top: 32px;
}
.pl-reslib-callout__icon { flex: 0 0 auto; color: var(--pl-blue); margin-top: 2px; }
.pl-reslib-callout p { margin: 0; color: var(--pl-muted); line-height: 1.55; }
.pl-reslib-callout strong { color: var(--pl-navy); }

/* Sidebar */
.pl-reslib-side { display: grid; gap: 18px; position: sticky; top: 24px; }
.pl-reslib-side__card {
	background: var(--pl-surface); border: 1px solid var(--pl-line);
	border-radius: var(--pl-radius-lg); padding: 22px; box-shadow: var(--pl-shadow-sm);
}
.pl-reslib-side__card--coa { border-top: 3px solid var(--pl-blue); }
.pl-reslib-side__card--ruo { background: var(--pl-surface-2); box-shadow: none; }
.pl-reslib-side__icon {
	display: inline-flex; align-items: center; justify-content: center;
	width: 42px; height: 42px; border-radius: var(--pl-radius-pill);
	background: var(--pl-blue-050); color: var(--pl-blue); margin-bottom: 12px;
}
.pl-reslib-side__title { font-family: var(--pl-font-heading); color: var(--pl-navy); font-size: 1.08rem; margin: 0 0 8px; }
.pl-reslib-side__text { color: var(--pl-muted); font-size: .92rem; line-height: 1.5; margin: 0 0 14px; }
.pl-reslib-side__card--ruo .pl-reslib-side__text { margin-bottom: 0; }
.pl-reslib-side__links { list-style: none; margin: 0; padding: 0; }
.pl-reslib-side__links li + li { border-top: 1px solid var(--pl-line); }
.pl-reslib-side__links a {
	display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 8px 0;
	color: var(--pl-navy); font-weight: 600; font-size: .94rem; text-decoration: none;
}
.pl-reslib-side__links a:hover { color: var(--pl-blue); }
.pl-reslib-side__linkic { flex: 0 0 auto; color: var(--pl-blue); }

/* =============================================================== RESPONSIVE */
@media (max-width: 960px) {
	.pl-reslib-abody__grid { grid-template-columns: 1fr; }
	.pl-reslib-side { position: static; }
}
@media (max-width: 900px) {
	.pl-reslib-hero__inner { grid-template-columns: 1fr; }
	.pl-reslib-coacard { justify-self: stretch; max-width: 460px; margin-inline: 0; }
}
@media (max-width: 720px) {
	.pl-reslib-cards { grid-template-columns: 1fr; }
	.pl-reslib-verify__inner { flex-direction: column; align-items: flex-start; }
	.pl-reslib-verify__btn { width: 100%; justify-content: center; }
}
@media (max-width: 480px) {
	.pl-reslib-coacard { padding: 18px; }
	.pl-reslib-hero__cta { gap: 12px 18px; }
}

/* =============================================================== REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
	.pl-reslib *,
	.pl-reslib *::before,
	.pl-reslib *::after { transition: none !important; }
	.pl-reslib-card:hover { transform: none; }
	a.pl-reslib-card__link:hover .pl-reslib-card__chev { transform: none; }
}