/* RPA index — the Insights listing as a research index: ruled rows of
   date · title · topic · arrow, a ruled head, topic filters, numbered pagination.
   Also used by search, 404 and the article's "Continue reading". */

.rpa-main--plain { padding-block-start: clamp(2rem, 1rem + 4vw, 5rem); }
.rpa-main--plain > :last-child:not(.rpa-band) { padding-block-end: var(--rpa-section); }

/* ---------- Head ---------- */

.rpa-index-head { padding-block-end: clamp(2.5rem, 2rem + 3vw, 5rem); }

.rpa-index-head__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block-end: 1rem;
  margin-block-end: clamp(1.75rem, 1rem + 2.5vw, 3.5rem);
  border-block-end: 1px solid var(--rpa-c-rule-strong);
}

.rpa-index-head__body {
  display: grid;
  gap: var(--rpa-gap) clamp(2rem, 6vw, 7rem);
}
.rpa-index-head__title {
  max-width: 17ch;
  font-size: var(--rpa-step-5);
}
.rpa-index-head__title em { overflow-wrap: anywhere; }
.rpa-index-head__intro {
  max-width: 42ch;
  margin: 0 0 2rem;
  color: var(--rpa-c-muted);
  font-size: var(--rpa-step-1);
  line-height: 1.5;
  letter-spacing: -0.006em;
}
@media (min-width: 900px) {
  .rpa-index-head__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- Search ---------- */

.rpa-search { max-width: 30rem; }
.rpa-search__label { display: block; margin-block-end: 0.35rem; }
.rpa-search__field {
  display: flex;
  align-items: stretch;
  border-block-end: 1.5px solid var(--rpa-c-text);
  transition: border-color var(--rpa-dur-1) var(--rpa-ease);
}
.rpa-search__field:focus-within { border-color: var(--rpa-c-focus); }
.rpa-search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.65rem 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--rpa-c-text);
  font-family: var(--rpa-serif);
  font-size: var(--rpa-step-2);
  font-weight: 350;
  line-height: 1.2;
  letter-spacing: -0.012em;
  -webkit-appearance: none;
  appearance: none;
}
.rpa-search__input::-webkit-search-cancel-button { -webkit-appearance: none; }
/* The underline changes colour and the field keeps the site's ring: 2px indigo, like every other control. */
.rpa-search__input:focus { outline: none; }
.rpa-search__field:has(.rpa-search__input:focus-visible) { outline: 2px solid var(--rpa-c-focus, var(--rpa-indigo)); outline-offset: 6px; border-radius: var(--rpa-radius); }
.rpa-search__submit {
  flex: none;
  min-width: 2.75rem;
  padding: 0 0.25rem 0 1rem;
  border: 0;
  background: none;
  color: var(--rpa-c-text);
  font-size: var(--rpa-step-2);
  font-weight: 300;
  line-height: 1;
  text-align: end;
}
.rpa-search__submit span[aria-hidden] { display: inline-block; transition: transform var(--rpa-dur-2) var(--rpa-ease); }
.rpa-search__submit { cursor: pointer; transition: color var(--rpa-dur-1) var(--rpa-ease); }
.rpa-search__submit:hover { color: var(--rpa-c-link); }
.rpa-search__submit:hover span[aria-hidden],
.rpa-search__submit:focus-visible span[aria-hidden] { transform: translateX(6px); }

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

.rpa-topics { margin-block-start: clamp(2.5rem, 2rem + 2vw, 4rem); }
.rpa-topics__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* On a phone eight wrapped chips push the articles a full screen down. One swipeable row instead:
   it bleeds to the screen edges, and the right edge fades so it reads as "more this way". */
@media (max-width: 639px) {
  .rpa-topics__list {
    flex-wrap: nowrap;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    margin-inline: calc(var(--rpa-gutter) * -1);
    padding-inline: var(--rpa-gutter);
    scroll-padding-inline: var(--rpa-gutter);
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 3rem), transparent);
    mask-image: linear-gradient(to right, #000 calc(100% - 3rem), transparent);
  }
  .rpa-topics__list::-webkit-scrollbar { display: none; }
  .rpa-topics__list > li { flex: none; scroll-snap-align: start; }
  .rpa-topics__link { white-space: nowrap; }
}
.rpa-topics__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6em;
  padding: 0.5em 0.9em;
  border: 1px solid var(--rpa-c-rule-strong);
  border-radius: var(--rpa-radius);
  color: var(--rpa-c-text);
  font-family: var(--rpa-mono);
  font-size: var(--rpa-step--1);
  letter-spacing: 0.06em;
  line-height: 1.3;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color var(--rpa-dur-1) var(--rpa-ease), color var(--rpa-dur-1) var(--rpa-ease), border-color var(--rpa-dur-1) var(--rpa-ease);
}
.rpa-topics__count { color: var(--rpa-c-muted); font-variant-numeric: tabular-nums; transition: inherit; }
.rpa-topics__link:hover,
.rpa-topics__link.is-current {
  border-color: var(--rpa-ink);
  background: var(--rpa-ink);
  color: var(--rpa-paper);
}
.rpa-topics__link:hover .rpa-topics__count,
.rpa-topics__link.is-current .rpa-topics__count { color: var(--rpa-on-dark-muted); }

/* ---------- Rows ---------- */
/* The rows themselves are the Insights widget's rows (template-parts/index-row.php prints the
   widget's classes; functions.php queues its stylesheet). Only the list reset lives here. */

.rpa-index__list { margin: 0; padding: 0; list-style: none; }
.rpa-index__empty { padding-block: 2rem var(--rpa-section); border-block-start: 1px solid var(--rpa-c-rule-strong); }

/* ---------- Pagination ---------- */

.rpa-pagination { margin-block-start: clamp(2.5rem, 2rem + 2vw, 4rem); }
.rpa-pagination__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.rpa-pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.9rem;
  min-height: 2.9rem;
  padding: 0 0.6rem;
  border: 1px solid transparent;
  border-radius: var(--rpa-radius);
  color: var(--rpa-c-text);
  font-family: var(--rpa-mono);
  font-size: var(--rpa-step--1);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  transition: border-color var(--rpa-dur-1) var(--rpa-ease), background-color var(--rpa-dur-1) var(--rpa-ease), color var(--rpa-dur-1) var(--rpa-ease);
}
.rpa-pagination a.page-numbers { border-color: var(--rpa-c-rule-strong); }
.rpa-pagination a.page-numbers:hover { border-color: var(--rpa-ink); background: var(--rpa-ink); color: var(--rpa-paper); }
.rpa-pagination .page-numbers.current { border-color: var(--rpa-ink); background: var(--rpa-ink); color: var(--rpa-paper); }
.rpa-pagination .page-numbers.dots { min-width: 1.5rem; padding: 0; color: var(--rpa-c-muted); }

/* ---------- 404 ---------- */

.rpa-404__head { padding-block-end: clamp(3rem, 2rem + 4vw, 6rem); }
.rpa-404__title { max-width: 14ch; font-size: var(--rpa-step-5); }
.rpa-404__actions { margin-block-start: 2.25rem; gap: 1rem 2rem; }
.rpa-404__latest { margin: 0 0 1rem; }

/* ---------- Plain (non-Elementor) page ---------- */

.rpa-page__head {
  padding-block-end: clamp(2rem, 1.5rem + 3vw, 4rem);
}
.rpa-page__title {
  padding-block-end: clamp(1.5rem, 1rem + 2vw, 3rem);
  border-block-end: 1px solid var(--rpa-c-rule-strong);
  font-size: var(--rpa-step-5);
}