/* Stack Research Library
 * A documentary workbench: clear paths on the hub, one calm reading column in every guide.
 */

.sr-research-library,
.sr-guide {
  --sr-research-rule: var(--sr-border);
  --sr-research-paper: var(--sr-white);
  --sr-research-wash: var(--sr-mist);
  --sr-research-error-soft: #fceff1;
  --sr-research-type-display: clamp(3rem, 4.8vw, 4rem);
  --sr-research-type-headline: 2rem;
  --sr-research-type-title: 1.25rem;
  --sr-research-type-body: 1rem;
  background: var(--sr-white);
  color: var(--sr-ink);
}

.sr-research-library__hero {
  padding: clamp(64px, 8vw, 104px) 0 clamp(58px, 7vw, 88px);
  border-bottom: 1px solid var(--sr-research-rule);
  background: var(--sr-research-paper);
}

.sr-research-library__hero-grid {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1.35fr) minmax(250px, 0.65fr);
  gap: clamp(48px, 8vw, 112px);
}

.sr-research-library__hero h1 {
  max-width: 790px;
  margin-bottom: 20px;
  font-size: var(--sr-research-type-display);
  letter-spacing: -0.04em;
}

.sr-research-library__hero-grid > div > p {
  max-width: 720px;
  margin: 0;
  color: var(--sr-slate);
  font-size: var(--sr-research-type-body);
  line-height: 1.65;
}

.sr-research-library__standards {
  margin: 0;
  border-top: 1px solid var(--sr-navy);
}

.sr-research-library__standards > div {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-research-library__standards dt,
.sr-research-library__standards dd {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.45;
}

.sr-research-library__standards dt {
  color: var(--sr-navy);
  font-weight: 800;
}

.sr-research-library__standards dd {
  color: var(--sr-muted);
}

.sr-research-library__body {
  padding-bottom: clamp(82px, 10vw, 140px);
}

.sr-research-search {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: -31px auto 0;
  padding: 18px 20px 15px;
  border: 1px solid var(--sr-research-rule);
  border-radius: var(--sr-radius);
  background: var(--sr-white);
}

.sr-research-search > label {
  display: block;
  margin-bottom: 8px;
  color: var(--sr-navy);
  font-size: 0.76rem;
  font-weight: 800;
}

.sr-research-search__control {
  display: grid;
  align-items: center;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
}

.sr-research-search__control > svg {
  color: var(--sr-blue);
}

.sr-research-search input {
  min-width: 0;
  height: 45px;
  padding: 0 4px;
  border: 0;
  background: transparent;
  color: var(--sr-navy);
  font-size: 1rem;
}

.sr-research-search input::placeholder {
  color: #697386;
}

.sr-research-search:focus-within {
  border-color: var(--sr-blue);
  box-shadow: 0 0 0 3px rgba(1, 90, 220, 0.14);
}

.sr-research-search button {
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid var(--sr-blue);
  border-radius: var(--sr-radius-sm);
  background: var(--sr-blue);
  color: var(--sr-white);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 800;
}

.sr-research-search button:hover {
  border-color: var(--sr-blue-hover);
  background: var(--sr-blue-hover);
}

.sr-research-search > p {
  margin: 8px 0 0 30px;
  color: var(--sr-muted);
  font-size: 0.73rem;
  line-height: 1.5;
}

.sr-research-feature {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.44fr);
  gap: clamp(26px, 4vw, 58px);
  margin-top: clamp(70px, 8vw, 108px);
  padding: clamp(38px, 5vw, 58px) 0;
  border-top: 1px solid var(--sr-navy);
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-research-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 18px;
  margin: 0 0 18px;
  color: var(--sr-muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.sr-research-meta a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--sr-blue);
  text-decoration: none;
}

.sr-research-meta span::before {
  margin-right: 18px;
  color: var(--sr-research-rule);
  content: "•";
}

.sr-research-feature h2 {
  max-width: 720px;
  margin-bottom: 15px;
  font-size: var(--sr-research-type-headline);
  letter-spacing: -0.04em;
}

.sr-research-feature h2 a {
  color: var(--sr-navy);
  text-decoration: none;
}

.sr-research-feature h2 a:hover {
  color: var(--sr-blue);
}

.sr-research-feature__copy > p:not(.sr-research-meta) {
  max-width: 680px;
  margin-bottom: 20px;
  color: var(--sr-slate);
  font-size: 1rem;
}

.sr-research-arrow-link,
.sr-research-method > a,
.sr-guide-related header > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  color: var(--sr-blue);
  font-size: 0.84rem;
  font-weight: 800;
  text-decoration: none;
}

.sr-research-arrow-link span,
.sr-research-method > a span,
.sr-guide-related header > a span {
  transition: transform 160ms ease;
}

.sr-research-arrow-link:hover span,
.sr-research-method > a:hover span,
.sr-guide-related header > a:hover span {
  transform: translateX(4px);
}

.sr-research-feature__scope {
  padding-left: clamp(24px, 3vw, 38px);
  border-left: 1px solid var(--sr-research-rule);
}

.sr-research-feature__scope strong {
  display: block;
  margin-bottom: 9px;
  color: var(--sr-navy);
  font-size: 0.86rem;
}

.sr-research-feature__scope p {
  margin: 0;
  color: var(--sr-muted);
  font-size: 0.82rem;
  line-height: 1.7;
}

.sr-research-topics,
.sr-research-index,
.sr-research-tools {
  display: grid;
  grid-template-columns: minmax(190px, 0.34fr) minmax(0, 1fr);
  gap: clamp(42px, 8vw, 112px);
  margin-top: clamp(78px, 10vw, 132px);
}

.sr-research-topics > header,
.sr-research-tools > header {
  align-self: start;
}

.sr-research-topics > header h2,
.sr-research-tools > header h2,
.sr-research-index__header h2 {
  margin-bottom: 12px;
  font-size: var(--sr-research-type-headline);
}

.sr-research-topics > header p,
.sr-research-tools > header p,
.sr-research-index__header p {
  margin: 0;
  color: var(--sr-muted);
  font-size: 0.86rem;
}

.sr-research-topics__list {
  border-top: 1px solid var(--sr-navy);
}

.sr-research-topic {
  display: grid;
  min-height: 105px;
  align-items: center;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 26px;
  padding: 22px 8px;
  border-bottom: 1px solid var(--sr-research-rule);
  color: var(--sr-navy);
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}

.sr-research-topic:hover,
.sr-research-topic.is-active {
  background: var(--sr-research-wash);
  color: var(--sr-blue);
}

.sr-research-topic > span:first-child {
  display: grid;
  gap: 6px;
}

.sr-research-topic strong {
  font-size: 1rem;
}

.sr-research-topic small {
  max-width: 680px;
  color: var(--sr-muted);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.55;
}

.sr-research-topic__count {
  min-width: 28px;
  color: var(--sr-muted);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.sr-research-topic > svg {
  color: var(--sr-blue);
}

.sr-research-index {
  display: block;
}

.sr-research-index__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--sr-navy);
}

.sr-research-index__header h2 {
  margin-bottom: 6px;
}

.sr-research-index__header > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--sr-blue);
  font-size: 0.8rem;
  font-weight: 750;
}

.sr-research-guide-row {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(140px, 0.28fr) minmax(0, 1fr) 100px 44px;
  gap: clamp(22px, 4vw, 54px);
  padding: 29px 8px;
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-research-guide-row__meta {
  display: grid;
  align-self: start;
  gap: 7px;
  color: var(--sr-muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.sr-research-guide-row__meta a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--sr-blue);
  text-decoration: none;
}

.sr-research-guide-row h3 {
  margin: 0 0 8px;
  font-size: var(--sr-research-type-title);
  letter-spacing: -0.028em;
  line-height: 1.25;
}

.sr-research-guide-row h3 a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--sr-navy);
  text-decoration: none;
}

.sr-research-guide-row h3 a:hover {
  color: var(--sr-blue);
}

.sr-research-guide-row p {
  max-width: 760px;
  margin: 0;
  color: var(--sr-slate);
  font-size: 0.84rem;
  line-height: 1.65;
}

.sr-research-guide-row > time {
  align-self: start;
  color: var(--sr-muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.sr-research-guide-row__open {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--sr-blue);
  font-size: 1.15rem;
  text-decoration: none;
  transition: transform 160ms ease;
}

.sr-research-empty {
  max-width: 760px;
  padding: clamp(42px, 7vw, 76px) 0;
}

.sr-research-empty h3 {
  margin-bottom: 10px;
  font-size: var(--sr-research-type-headline);
}

.sr-research-empty p {
  color: var(--sr-slate);
}

.sr-research-empty > div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sr-research-tools > nav {
  border-top: 1px solid var(--sr-navy);
}

.sr-research-tools > nav a {
  display: grid;
  min-height: 100px;
  align-items: center;
  grid-template-columns: minmax(150px, 0.36fr) minmax(0, 1fr) auto;
  gap: 28px;
  padding: 20px 8px;
  border-bottom: 1px solid var(--sr-research-rule);
  color: var(--sr-navy);
  text-decoration: none;
}

.sr-research-tools > nav a:hover {
  background: var(--sr-research-wash);
}

.sr-research-tools > nav strong {
  font-size: 0.94rem;
}

.sr-research-tools > nav span {
  color: var(--sr-muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.sr-research-tools > nav b {
  color: var(--sr-blue);
  font-size: 1.08rem;
  font-weight: 500;
}

.sr-research-method {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 42px;
  margin-top: clamp(86px, 11vw, 150px);
  padding: clamp(32px, 5vw, 54px);
  border-radius: var(--sr-radius);
  background: var(--sr-navy);
  color: rgba(255, 255, 255, 0.76);
}

.sr-research-method h2 {
  margin-bottom: 12px;
  color: var(--sr-white);
  font-size: var(--sr-research-type-headline);
}

.sr-research-method p {
  max-width: 820px;
  margin: 0;
  font-size: 0.94rem;
}

.sr-research-method > a {
  color: var(--sr-blue-soft);
  white-space: nowrap;
}

.sr-research-context-link {
  margin-top: clamp(48px, 7vw, 76px);
  padding: clamp(28px, 5vw, 44px) 0;
  border-top: 1px solid var(--sr-navy);
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-research-context-link h2 {
  max-width: 720px;
  margin: 0 0 13px;
  font-size: var(--sr-research-type-headline);
  letter-spacing: -0.04em;
}

.sr-research-context-link p {
  max-width: 72ch;
  margin: 0 0 18px;
  color: var(--sr-slate);
}

.sr-research-context-link > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  color: var(--sr-blue);
  font-size: 0.84rem;
  font-weight: 800;
  text-decoration: none;
}

/* Guide reading surface */
.sr-guide-progress {
  position: fixed;
  z-index: 130;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
}

.sr-guide-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--sr-blue);
  transform-origin: left center;
}

.sr-guide-header {
  padding: 30px 0 clamp(46px, 7vw, 82px);
  border-bottom: 1px solid var(--sr-research-rule);
  background: var(--sr-research-paper);
}

.sr-guide-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(36px, 6vw, 68px);
  color: var(--sr-muted);
  font-size: 0.73rem;
  font-weight: 700;
}

.sr-guide-breadcrumbs a {
  color: var(--sr-muted);
  text-decoration: none;
}

.sr-guide-breadcrumbs a:hover {
  color: var(--sr-blue);
}

.sr-guide-breadcrumbs span {
  color: var(--sr-muted);
}

.sr-guide-header__layout {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1fr) minmax(235px, 0.35fr);
  gap: clamp(48px, 8vw, 118px);
}

.sr-guide-header h1 {
  max-width: 950px;
  margin-bottom: 20px;
  font-size: var(--sr-research-type-display);
  letter-spacing: -0.04em;
}

.sr-guide-deck {
  max-width: 780px;
  margin: 0;
  color: var(--sr-slate);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.68;
}

.sr-guide-facts {
  margin: 0;
  border-top: 1px solid var(--sr-navy);
}

.sr-guide-facts > div {
  display: grid;
  grid-template-columns: 105px minmax(0, 1fr);
  gap: 15px;
  padding: 11px 0;
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-guide-facts dt,
.sr-guide-facts dd {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.45;
}

.sr-guide-facts dt {
  color: var(--sr-muted);
}

.sr-guide-facts dd {
  color: var(--sr-navy);
  font-weight: 750;
}

.sr-guide-facts a {
  color: var(--sr-blue);
  text-decoration: none;
}

.sr-guide-boundary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: clamp(38px, 5vw, 58px);
  padding-top: 22px;
  border-top: 1px solid var(--sr-research-rule);
  color: var(--sr-slate);
}

.sr-guide-boundary svg {
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--sr-blue);
}

.sr-guide-boundary p {
  max-width: 940px;
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
}

.sr-guide-boundary strong {
  color: var(--sr-navy);
}

.sr-guide-layout {
  display: grid;
  align-items: start;
  grid-template-columns: 210px minmax(0, 760px);
  justify-content: center;
  gap: clamp(48px, 8vw, 108px);
  padding-top: clamp(56px, 8vw, 94px);
  padding-bottom: clamp(82px, 11vw, 145px);
}

.sr-guide-rail__sticky {
  position: sticky;
  top: 126px;
  max-height: calc(100vh - 150px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 6px;
  scrollbar-width: thin;
}

.sr-guide-rail {
  min-width: 0;
}

.sr-guide-rail__sticky > strong {
  display: block;
  margin-bottom: 12px;
  color: var(--sr-navy);
  font-size: 0.76rem;
}

.sr-guide-rail nav {
  display: grid;
  border-top: 1px solid var(--sr-navy);
}

.sr-guide-rail nav > span {
  padding: 13px 0;
  border-bottom: 1px solid var(--sr-research-rule);
  color: var(--sr-muted);
  font-size: 0.72rem;
  line-height: 1.5;
}

.sr-guide-rail nav a {
  padding: 10px 4px;
  border-bottom: 1px solid var(--sr-research-rule);
  color: var(--sr-muted);
  font-size: 0.72rem;
  font-weight: 650;
  line-height: 1.42;
  text-decoration: none;
}

.sr-guide-rail nav a[data-level="3"] {
  padding-left: 14px;
  font-size: 0.68rem;
}

.sr-guide-rail nav a:hover,
.sr-guide-rail nav a.is-active {
  background: var(--sr-research-wash);
  color: var(--sr-blue);
}

.sr-guide-rail nav a[aria-current="location"] {
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.sr-guide-rail__tools {
  display: grid;
  margin-top: 24px;
}

.sr-guide-rail__tools a {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--sr-research-rule);
  color: var(--sr-blue);
  font-size: 0.72rem;
  font-weight: 750;
  text-decoration: none;
}

.sr-guide-main {
  min-width: 0;
}

.sr-guide-answer {
  margin-bottom: clamp(46px, 7vw, 72px);
  padding: 22px 26px;
  border: 1px solid var(--sr-research-rule);
  background: var(--sr-blue-soft);
}

.sr-guide-answer h2 {
  margin: 0 0 7px;
  font-size: 1rem;
  letter-spacing: -0.015em;
}

.sr-guide-answer p {
  margin: 0;
  color: var(--sr-slate);
  font-size: 0.88rem;
  line-height: 1.68;
}

.sr-guide-content {
  color: var(--sr-ink);
  font-size: clamp(1rem, 1.25vw, 1.075rem);
  line-height: 1.82;
}

.sr-guide-content > * {
  max-width: 72ch;
}

.sr-guide-content > :first-child {
  margin-top: 0;
}

.sr-guide-content p,
.sr-guide-content li {
  text-wrap: pretty;
}

.sr-guide-content p {
  margin: 0 0 1.45em;
}

.sr-guide-content h2 {
  margin: 2.45em 0 0.8em;
  color: var(--sr-navy);
  font-size: var(--sr-research-type-headline);
  letter-spacing: -0.04em;
  line-height: 1.14;
  scroll-margin-top: 130px;
}

.sr-guide-content h3 {
  margin: 2em 0 0.65em;
  color: var(--sr-navy);
  font-size: var(--sr-research-type-title);
  letter-spacing: -0.025em;
  line-height: 1.25;
  scroll-margin-top: 130px;
}

.sr-guide-content h4 {
  margin: 1.8em 0 0.6em;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
  scroll-margin-top: 130px;
}

.sr-guide-content a {
  font-weight: 650;
  text-decoration-thickness: 1px;
}

.sr-guide-content ul,
.sr-guide-content ol {
  margin: 0 0 1.6em;
  padding-left: 1.3em;
}

.sr-guide-content li {
  margin-bottom: 0.62em;
  padding-left: 0.25em;
}

.sr-guide-content blockquote {
  margin: 2em 0;
  padding: 22px 26px;
  border: 1px solid var(--sr-research-rule);
  background: var(--sr-research-wash);
  color: var(--sr-navy);
}

.sr-guide-content blockquote p:last-child {
  margin-bottom: 0;
}

.sr-guide-content .sr-guide-five-minute {
  max-width: 76ch;
  margin: clamp(54px, 8vw, 82px) 0;
  padding: clamp(28px, 5vw, 42px);
  border-top: 1px solid var(--sr-navy);
  border-bottom: 1px solid var(--sr-research-rule);
  background: var(--sr-research-paper);
}

.sr-guide-content .sr-guide-five-minute h2,
.sr-guide-content .sr-guide-faq h2 {
  margin-top: 0;
}

.sr-guide-content .sr-guide-five-minute ol {
  margin-bottom: 0;
  padding: 0;
  list-style: none;
  counter-reset: five-minute;
}

.sr-guide-content .sr-guide-five-minute li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 13px 0;
  border-bottom: 1px solid var(--sr-research-rule);
  counter-increment: five-minute;
}

.sr-guide-content .sr-guide-five-minute li:last-child {
  border-bottom: 0;
}

.sr-guide-content .sr-guide-five-minute li::before {
  color: var(--sr-blue);
  content: counter(five-minute, decimal-leading-zero);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.sr-guide-content .sr-guide-faq {
  margin-top: clamp(64px, 9vw, 96px);
  padding-top: 32px;
  border-top: 1px solid var(--sr-navy);
}

.sr-guide-content .sr-guide-faq h3 {
  margin-top: 1.4em;
  padding-top: 1.15em;
  border-top: 1px solid var(--sr-research-rule);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.sr-guide-content .sr-guide-educational-notice {
  margin-top: clamp(48px, 7vw, 72px);
  padding: 20px 22px;
  border: 1px solid var(--sr-research-rule);
  background: var(--sr-research-wash);
  color: var(--sr-slate);
  font-size: 0.84rem;
  line-height: 1.65;
}

.sr-guide-content .sr-guide-educational-notice p {
  margin: 0;
}

.sr-guide-content figure {
  max-width: 100%;
  margin: 2.2em 0;
}

.sr-guide-content figure img,
.sr-guide-content > img {
  width: 100%;
  border: 1px solid var(--sr-research-rule);
  background: var(--sr-research-paper);
}

.sr-guide-content figcaption {
  margin-top: 9px;
  color: var(--sr-muted);
  font-size: 0.75rem;
  line-height: 1.55;
}

.sr-guide-content .wp-block-table,
.sr-guide-table-scroll {
  max-width: 100%;
  margin: 2em 0;
  overflow-x: auto;
}

.sr-guide-table-scroll {
  overscroll-behavior-inline: contain;
}

.sr-guide-table-scroll > table {
  min-width: 680px;
  margin: 0;
}

.sr-guide-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  line-height: 1.55;
}

.sr-guide-content th,
.sr-guide-content td {
  padding: 13px 15px;
  border: 1px solid var(--sr-research-rule);
  text-align: left;
  vertical-align: top;
}

.sr-guide-content th {
  background: var(--sr-research-wash);
  color: var(--sr-navy);
  font-weight: 800;
}

.sr-guide-content code {
  padding: 0.14em 0.32em;
  border-radius: var(--sr-radius-sm);
  background: var(--sr-research-wash);
  font-size: 0.88em;
}

.sr-guide-download {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(150px, 0.36fr) minmax(0, 1fr);
  gap: clamp(30px, 6vw, 70px);
  margin-top: clamp(72px, 10vw, 112px);
  padding: clamp(26px, 5vw, 46px);
  border-radius: var(--sr-radius);
  background: var(--sr-navy);
  color: rgba(255, 255, 255, 0.74);
  scroll-margin-top: 130px;
}

.sr-guide-download > img {
  width: 100%;
  max-width: 250px;
  justify-self: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.24);
}

.sr-guide-download h2 {
  margin-bottom: 12px;
  color: var(--sr-white);
  font-size: var(--sr-research-type-headline);
}

.sr-guide-download p {
  margin-bottom: 22px;
  font-size: 0.9rem;
  line-height: 1.7;
}

.sr-guide-download .sr-button {
  justify-content: flex-start;
  background: var(--sr-white);
  box-shadow: none;
  color: var(--sr-navy);
  text-align: left;
}

.sr-guide-download .sr-button:hover {
  background: var(--sr-blue-soft);
  color: var(--sr-navy);
}

.sr-guide-download small {
  display: block;
  margin-top: 11px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.7rem;
}

.sr-guide-sources {
  margin-top: clamp(72px, 10vw, 112px);
  padding-top: 34px;
  border-top: 1px solid var(--sr-navy);
  scroll-margin-top: 130px;
}

.sr-guide-sources header {
  display: grid;
  grid-template-columns: minmax(170px, 0.35fr) minmax(0, 1fr);
  gap: 34px;
  margin-bottom: 22px;
}

.sr-guide-sources h2,
.sr-guide-record h2 {
  margin: 0;
  font-size: var(--sr-research-type-headline);
}

.sr-guide-sources header p,
.sr-guide-record > div:first-child p {
  margin: 0;
  color: var(--sr-muted);
  font-size: 0.82rem;
}

.sr-guide-sources ol {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--sr-research-rule);
  list-style: none;
  counter-reset: source;
}

.sr-guide-sources li {
  position: relative;
  padding: 19px 0 19px 42px;
  border-bottom: 1px solid var(--sr-research-rule);
  counter-increment: source;
}

.sr-guide-sources li::before {
  position: absolute;
  top: 20px;
  left: 0;
  color: var(--sr-blue);
  content: counter(source, decimal-leading-zero);
  font-size: 0.7rem;
  font-weight: 800;
}

.sr-guide-sources li > a {
  color: var(--sr-navy);
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.45;
}

.sr-guide-sources li > span {
  display: block;
  margin-top: 4px;
  color: var(--sr-muted);
  font-size: 0.72rem;
}

.sr-guide-sources li > p {
  margin: 8px 0 0;
  color: var(--sr-slate);
  font-size: 0.78rem;
}

.sr-guide-sources__missing {
  padding: 18px 20px;
  border: 1px solid var(--sr-error);
  background: var(--sr-research-error-soft);
  color: var(--sr-error);
  font-size: 0.84rem;
}

.sr-guide-record {
  display: grid;
  grid-template-columns: minmax(170px, 0.42fr) minmax(0, 1fr);
  gap: clamp(34px, 6vw, 72px);
  margin-top: clamp(66px, 9vw, 100px);
  padding-top: 34px;
  border-top: 1px solid var(--sr-navy);
}

.sr-guide-record dl {
  margin: 0;
  border-top: 1px solid var(--sr-research-rule);
}

.sr-guide-record dl > div {
  display: grid;
  grid-template-columns: minmax(130px, 0.52fr) minmax(0, 1fr);
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--sr-research-rule);
}

.sr-guide-record dt,
.sr-guide-record dd {
  margin: 0;
  font-size: 0.74rem;
}

.sr-guide-record dt {
  color: var(--sr-muted);
}

.sr-guide-record dd {
  color: var(--sr-navy);
  font-weight: 700;
}

.sr-guide-record dd a {
  color: var(--sr-blue);
}

.sr-guide-record__correction {
  grid-column: 2;
  padding: 16px 18px;
  border: 1px solid var(--sr-research-rule);
  background: var(--sr-research-wash);
}

.sr-guide-record__correction strong {
  color: var(--sr-navy);
  font-size: 0.76rem;
}

.sr-guide-record__correction p {
  margin: 5px 0 0;
  color: var(--sr-slate);
  font-size: 0.78rem;
}

.sr-guide-related {
  padding: clamp(58px, 8vw, 94px) 0;
  background: var(--sr-navy);
}

.sr-guide-related header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 28px;
}

.sr-guide-related h2 {
  margin: 0;
  color: var(--sr-white);
  font-size: var(--sr-research-type-headline);
}

.sr-guide-related header > a {
  color: var(--sr-blue-soft);
}

.sr-guide-related__list {
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}

.sr-guide-related__list > a {
  display: grid;
  min-height: 94px;
  align-items: center;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr) auto auto;
  gap: 30px;
  padding: 18px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--sr-white);
  text-decoration: none;
}

.sr-guide-related__list > a:hover {
  background: rgba(255, 255, 255, 0.045);
}

.sr-guide-related__list span,
.sr-guide-related__list small {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.72rem;
}

.sr-guide-related__list strong {
  font-size: 1rem;
  line-height: 1.4;
}

.sr-guide-related__list b {
  color: var(--sr-blue-soft);
  font-size: 1.1rem;
  font-weight: 500;
}

@media (max-width: 1024px) {
  .sr-research-library__hero-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 54px;
  }

  .sr-research-feature {
    grid-template-columns: 46px minmax(0, 1fr) 230px;
  }

  .sr-research-topics,
  .sr-research-tools {
    gap: 54px;
  }

  .sr-guide-header__layout {
    grid-template-columns: minmax(0, 1fr) 245px;
    gap: 56px;
  }

  .sr-guide-layout {
    grid-template-columns: 190px minmax(0, 700px);
    gap: 52px;
  }

  .sr-guide-content figure,
  .sr-guide-content .wp-block-table,
  .sr-guide-table-scroll {
    margin-inline: 0;
  }
}

@media (max-width: 820px) {
  .sr-research-library__hero-grid,
  .sr-guide-header__layout {
    grid-template-columns: 1fr;
  }

  .sr-research-library__standards,
  .sr-guide-facts {
    max-width: 520px;
  }

  .sr-research-feature {
    grid-template-columns: 1fr;
  }

  .sr-research-feature__scope {
    grid-column: 1;
    padding: 22px 0 0;
    border-top: 1px solid var(--sr-research-rule);
    border-left: 0;
  }

  .sr-research-topics,
  .sr-research-tools {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .sr-research-topics > header,
  .sr-research-tools > header {
    max-width: 540px;
  }

  .sr-research-guide-row {
    grid-template-columns: 120px minmax(0, 1fr) 44px;
  }

  .sr-research-guide-row > time {
    display: none;
  }

  .sr-research-method {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .sr-guide-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 42px;
  }

  .sr-guide-rail__sticky {
    position: static;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .sr-guide-rail nav {
    display: flex;
    overflow-x: auto;
    padding-bottom: 8px;
    border-top: 1px solid var(--sr-navy);
    scrollbar-width: thin;
  }

  .sr-guide-rail nav a,
  .sr-guide-rail nav a[data-level="3"] {
    flex: 0 0 auto;
    max-width: 220px;
    min-height: 44px;
    padding: 11px 14px;
    border-right: 1px solid var(--sr-research-rule);
    border-bottom: 1px solid var(--sr-research-rule);
  }

  .sr-guide-rail nav a[data-level="3"] {
    display: none;
  }

  .sr-guide-rail nav > span {
    min-height: 44px;
    padding: 11px 0;
  }

  .sr-guide-rail__tools {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-top: 12px;
  }

  .sr-guide-rail__tools a {
    min-height: 44px;
    gap: 8px;
    border: 0;
  }
}

@media (max-width: 640px) {
  .sr-research-library__hero {
    padding: 54px 0 72px;
  }

  .sr-research-library__hero-grid {
    gap: 38px;
  }

  .sr-research-library__hero h1,
  .sr-guide-header h1 {
    font-size: var(--sr-research-type-headline);
  }

  .sr-research-search {
    margin-top: -28px;
    padding: 15px;
  }

  .sr-research-search__control {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .sr-research-search button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .sr-research-search > p {
    margin-left: 0;
  }

  .sr-research-feature {
    grid-template-columns: 1fr;
  }

  .sr-research-feature__scope {
    grid-column: 1;
  }

  .sr-research-topics__list {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 2px 2px 12px;
    border-top: 0;
    scroll-padding-inline: 2px;
    scroll-snap-type: inline proximity;
    scrollbar-width: thin;
  }

  .sr-research-meta span::before {
    margin-right: 10px;
  }

  .sr-research-meta {
    gap: 6px 10px;
  }

  .sr-research-topic {
    min-height: 138px;
    flex: 0 0 min(82vw, 330px);
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    padding: 20px;
    border: 1px solid var(--sr-research-rule);
    scroll-snap-align: start;
  }

  .sr-research-topic > svg {
    display: none;
  }

  .sr-research-index__header {
    align-items: start;
    flex-direction: column;
    gap: 12px;
  }

  .sr-research-guide-row {
    position: relative;
    grid-template-columns: 1fr 44px;
    gap: 15px;
    padding: 24px 2px;
  }

  .sr-research-guide-row__meta {
    display: flex;
    grid-column: 1 / -1;
    gap: 12px;
  }

  .sr-research-guide-row__open {
    grid-column: 2;
    grid-row: 2;
  }

  .sr-research-tools > nav a {
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
    padding-block: 20px;
  }

  .sr-research-tools > nav span {
    grid-column: 1;
  }

  .sr-research-tools > nav b {
    grid-column: 2;
    grid-row: 1 / 3;
  }

  .sr-research-method {
    padding: 28px 24px;
  }

  .sr-guide-header {
    padding-top: 22px;
  }

  .sr-guide-breadcrumbs {
    margin-bottom: 34px;
  }

  .sr-guide-header h1 {
    letter-spacing: -0.04em;
  }

  .sr-guide-header__layout {
    gap: 38px;
  }

  .sr-guide-facts > div {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .sr-guide-facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sr-guide-facts > div {
    display: block;
    min-width: 0;
    padding: 12px 10px;
  }

  .sr-guide-facts > div:nth-child(odd) {
    border-right: 1px solid var(--sr-research-rule);
  }

  .sr-guide-facts dt {
    margin-bottom: 4px;
  }

  .sr-guide-boundary {
    margin-top: 34px;
  }

  .sr-guide-layout {
    padding-top: 42px;
  }

  .sr-guide-answer {
    padding: 19px 20px;
  }

  .sr-guide-content {
    font-size: 1rem;
    line-height: 1.77;
  }

  .sr-guide-content .wp-block-table,
  .sr-guide-table-scroll {
    width: 100%;
    margin-left: 0;
  }

  .sr-guide-sources header,
  .sr-guide-record,
  .sr-guide-download {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .sr-guide-download {
    gap: 28px;
  }

  .sr-guide-download > img {
    max-width: 210px;
  }

  .sr-guide-record__correction {
    grid-column: 1;
  }

  .sr-guide-related header {
    align-items: start;
    flex-direction: column;
    gap: 10px;
  }

  .sr-guide-related__list > a {
    grid-template-columns: 1fr auto;
    gap: 7px 14px;
    padding-block: 20px;
  }

  .sr-guide-related__list span,
  .sr-guide-related__list strong {
    grid-column: 1;
  }

  .sr-guide-related__list small {
    grid-column: 1;
  }

  .sr-guide-related__list b {
    grid-column: 2;
    grid-row: 1 / 4;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sr-research-topic,
  .sr-research-guide-row__open,
  .sr-research-arrow-link span,
  .sr-research-method > a span,
  .sr-guide-related header > a span {
    transition: none;
  }
}