/* Opt-in research layouts: place .rp-editorial on a story ancestor and compose
   .rp-section with .rp-section-heading, .rp-rationale-intro,
   .rp-feature-layout > .rp-feature-grid (--2/--3 select the feature count),
   and .rp-metric-grid (default three columns; --two for two, --large for values).
   .rp-eyebrow, .rp-problem-title and .rp-feature-* supply the shared hierarchy.
   Load last. Existing scientific media keep their own sizing and direct parents.
   .rp-hero-mobile-cover is a separate opt-in; it does not need .rp-editorial. */
@font-face {
  font-family: "IBM Plex Sans Variable";
  font-style: normal;
  font-weight: 100 700;
  font-display: swap;
  src: url("./fonts/ibm-plex-sans-latin-wght-normal.woff2") format("woff2");
}

.rp-editorial {
  --rp-content-max: 1080px;
  --rp-gutter: clamp(20px, 4vw, 48px);
  --rp-grid-gap: 20px;
  --rp-index-size: 12px;
  --rp-problem-size: clamp(30px, 3vw, 42px);
  --rp-heading-size: clamp(30px, 2.8vw, 38px);
  --rp-feature-size: 20px;
  --rp-body-size: 17px;
  --rp-caption-size: 14px;
  --rp-text: #222426;
  --rp-muted: #525451;
  --rp-index-color: #666A67;
  --rp-divider: #D8D8D3;
  --rp-strong-rule: #3C4340;
  --rp-section-space: 72px;
}

/* Sections already supply gutters through their width; add no inner padding. */
html.research-page .rp-editorial .research-section.rp-section {
  --content-width: var(--rp-content-max);
  --page-gutter: var(--rp-gutter);
  --project-content-width: var(--rp-content-max);
  --media-space: 28px;
  width: min(var(--rp-content-max), calc(100% - 2 * var(--rp-gutter)));
  max-width: var(--rp-content-max);
  margin-inline: auto;
  padding: var(--rp-section-space) 0;
  border: 0;
  font-family: "IBM Plex Sans Variable", sans-serif;
  font-size: var(--rp-body-size);
  font-weight: 400;
  line-height: 1.7;
  color: var(--rp-text);
  text-align: left;
}
html.research-page .rp-editorial .rp-section + .rp-section { padding-top: 0; }
html.research-page .rp-editorial .paper-metadata + .rp-section {
  padding-top: max(0px, calc(var(--rp-section-space) - var(--section-space)));
}
.rp-editorial .rp-section :is(h2, h3, p, ol, dl) { font-family: inherit; }
.rp-editorial .rp-section h2 {
  max-width: none;
  margin: 0;
  color: var(--rp-text);
  font-size: var(--rp-heading-size);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.035em;
  text-align: left;
}
.rp-editorial .rp-section p {
  max-width: none;
  margin: 0;
  font-size: var(--rp-body-size);
  font-weight: 400;
  line-height: 1.7;
  text-align: left;
}
.rp-editorial .rp-section .rp-eyebrow,
.rp-editorial .rp-feature-number {
  margin: 0;
  color: var(--rp-index-color);
  font-size: var(--rp-index-size);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.rp-editorial .rp-section .rp-problem-title {
  width: 100%;
  max-width: 960px;
  margin: 12px 0 0;
  font-size: var(--rp-problem-size);
  line-height: 1.17;
  text-wrap: wrap;
}
.rp-editorial .rp-section > .rp-rationale-intro { margin-top: 28px; }
.rp-editorial .rp-rationale-intro > p + p { margin-top: 12px; }
.rp-editorial .rp-section-heading {
  display: block;
  width: 100%;
  margin-bottom: 28px;
}
.rp-editorial .rp-section-heading .rp-eyebrow { margin: 0 0 12px; }
.rp-editorial .rp-section-heading h2 {
  width: 100%;
  max-width: 960px;
  margin: 0;
  font-size: var(--rp-heading-size);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.035em;
  text-align: left;
}
.rp-editorial .rp-section-heading p:not(.rp-eyebrow) {
  width: 100%;
  max-width: 900px;
  margin: 12px 0 0;
  color: var(--rp-muted);
  font-size: var(--rp-body-size);
  line-height: 1.7;
  text-align: left;
}
/* The heading group owns the interval; nested picture margins must not
   collapse through a full-resolution link and add another media gap. */
.rp-editorial .rp-section .research-enlarge > picture { margin-block: 0; }
.rp-editorial .rp-feature > div { min-width: 0; }

/* Only this wrapper establishes size containment, leaving scientific cqw
   media measures relative to their original page container. */
.rp-editorial .rp-feature-layout {
  container: rp-features / inline-size;
  margin-top: 20px;
}
.rp-editorial .rp-feature-grid {
  display: grid;
  width: 100%;
  gap: var(--rp-grid-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}
.rp-editorial .rp-feature-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rp-editorial .rp-feature-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rp-editorial .rp-feature {
  min-width: 0;
  margin: 0;
  padding: 16px 0 0;
  border: 0;
  border-top: 2px solid var(--rp-strong-rule);
  border-radius: 0;
  background: transparent;
  text-align: left;
}
.rp-editorial .rp-feature-number { display: block; }
.rp-editorial .rp-section .rp-feature-title {
  margin: 12px 0 0;
  font-size: var(--rp-feature-size);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: normal;
}
.rp-editorial .rp-section .rp-feature-description {
  margin: 12px 0 0;
  color: var(--rp-muted);
  font-size: 16px;
  line-height: 1.6;
}
.rp-editorial .rp-section > .rp-feature-layout + :is(.comparison-media, .research-wide) {
  margin-top: 30px;
}

.rp-editorial .rp-section figcaption {
  margin-top: 10px;
  font-family: inherit;
  font-size: var(--rp-caption-size);
  font-weight: 400;
  line-height: 1.5;
}
.rp-editorial .rp-result-group > h3 {
  margin: 0;
  font-size: var(--rp-feature-size);
  font-weight: 600;
  line-height: 1.3;
}
.rp-editorial .rp-result-group > p { margin-top: 12px; color: var(--rp-muted); }
.rp-editorial .rp-result-group + .rp-result-group { margin-top: 28px; }
.rp-editorial .rp-metric-grid {
  --rp-metric-columns: 3;
  --rp-metric-size: clamp(26px, 3vw, 40px);
  display: grid;
  grid-template-columns: repeat(var(--rp-metric-columns), minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: var(--rp-grid-gap);
  margin-block: 24px 0;
  padding: 0;
}
.rp-editorial .rp-metric-grid--two { --rp-metric-columns: 2; }
.rp-editorial .rp-metric-grid--large { --rp-metric-size: clamp(44px, 4vw, 54px); }
.rp-editorial .rp-metric-grid > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 0;
  min-height: 150px;
  padding: 24px 16px;
  border: 1px solid #e8e7e3;
  border-radius: 12px;
  background: #f8f8f6;
  text-align: center;
}
.rp-editorial .rp-metric-grid dt {
  margin: 0;
  color: var(--rp-muted);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.4;
}
.rp-editorial .rp-metric-grid dd {
  order: -1;
  margin: 0;
  padding: 0;
  color: var(--rp-text);
  font-size: var(--rp-metric-size);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  letter-spacing: -0.035em;
}
.rp-editorial .rp-metric-grid .result-unit { font-size: 0.62em; letter-spacing: -0.02em; }

@container rp-features (max-width: 760px) {
  .rp-editorial .rp-feature-grid--3 { grid-template-columns: minmax(0, 1fr); }
}
@container rp-features (max-width: 580px) {
  .rp-editorial .rp-feature-grid--2 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 1023px) {
  .rp-editorial { --rp-section-space: 48px; }
}
@media (max-width: 767px) {
  .rp-editorial { --rp-section-space: 40px; }
}
@media (max-width: 640px) {
  .rp-editorial .rp-metric-grid { grid-template-columns: minmax(0, 1fr); }
}

/* Independent cover opt-in for phones and portrait tablets. Wider landscape
   Heroes retain their native video framing. */
@media (max-width: 767px),
       (max-width: 900px) and (orientation: portrait) {
  html.research-page .project-hero.rp-hero-mobile-cover {
    height: 100vh;
    height: 100svh;
    overflow: hidden;
  }
  html.research-page .project-hero.rp-hero-mobile-cover .hero-media-primary {
    position: absolute;
    inset: 0;
    display: block;
    overflow: hidden;
  }
  html.research-page .project-hero.rp-hero-mobile-cover .hero-media-primary video {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    max-width: none;
    max-height: none;
    aspect-ratio: auto;
    object-fit: cover;
    object-position: var(--rp-mobile-hero-position, 50% 50%);
    margin: 0;
    border: 0;
    border-radius: 0;
    transform: none;
    mask-image: none;
    -webkit-mask-image: none;
  }
}