/* ==========================================================================
   Region pages (county + constituency) — an elevated, colour-coded layer on
   top of the global design system (core.css + components.css). Loaded last via
   {% block extra_css %}, so it wins ties. Token/hsl() only — NO raw #hex (the
   design linter forbids hex in app CSS; hsl() literals + var(--colour-*) are
   fine). Dark hero comes from the shared `has-brand-hero` band.
   ========================================================================== */

/* Smooth in-page jumps from the section nav (region pages only). */
html:has(.region-page) { scroll-behavior: smooth; }

/* ---- Canvas: a soft tinted wash so the white section cards read as distinct
   panels instead of merging into one white sheet. ---- */
body.region-page {
  background: linear-gradient(180deg, hsl(150 30% 97.5%), var(--colour-bg-subtle) 520px);
}

/* ---- Hero: KPI cards floating inside the shared dark `has-brand-hero` band.
   White .stat cards pop on the deep civic background. ---- */
.region-hero__lead {
  margin: var(--space-2) 0 0;
  max-width: 60ch;
  color: hsl(0 0% 100% / 0.82);
  font-size: var(--text-base);
  line-height: var(--leading-snug);
}
.region-hero__lead a { color: hsl(0 0% 100%); text-decoration: underline; text-underline-offset: 0.18em; }
.region-kpis { margin: var(--space-5) 0 0; }
.region-kpi { display: flex; flex-direction: column; align-items: center; gap: var(--space-1); position: relative; }
.region-kpi__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.1rem; height: 2.1rem; margin-bottom: var(--space-1);
  border-radius: var(--radius-md);
  background: var(--colour-primary-alpha-10); color: var(--colour-primary);
  font-size: var(--text-base);
}
/* Drill affordance: a corner cue on clickable KPIs, brightening on hover. */
.region-kpi.stat--link::after {
  content: "\f424"; /* fa expand */
  font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute; top: var(--space-3); right: var(--space-3);
  font-size: var(--text-xs); color: var(--colour-border-strong);
  transition: color var(--motion-fast) var(--ease-standard);
}
.region-kpi.stat--link:hover::after,
.region-kpi.stat--link:focus-visible::after { color: var(--colour-primary); }
.region-kpi.stat--link:focus-visible { outline: 2px solid hsl(0 0% 100% / 0.7); outline-offset: 2px; }

/* ---- Sticky section nav (jump pills under the hero) ---- */
.region-nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: center;
  margin: 0 0 var(--space-6); padding: var(--space-3) 0;
  background: hsl(0 0% 100% / 0.86);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--colour-border);
}
.region-nav__link {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--colour-border-strong); border-radius: var(--radius-pill);
  text-decoration: none; color: var(--colour-text);
  font-size: var(--text-sm); font-weight: var(--fw-semibold);
  transition: border-color var(--motion-fast) var(--ease-standard),
    color var(--motion-fast) var(--ease-standard),
    background-color var(--motion-fast) var(--ease-standard);
}
.region-nav__link i { color: var(--nav-accent, var(--colour-text-muted)); font-size: var(--text-sm); }
.region-nav__link:hover { border-color: var(--colour-primary); color: var(--colour-primary); }
.region-nav__link:hover i { color: var(--colour-primary); }
.region-nav__link.is-active {
  background: var(--nav-accent, var(--colour-primary)); border-color: transparent; color: var(--colour-bg);
}
.region-nav__link.is-active i { color: var(--colour-bg); }
.region-nav__link:focus-visible { outline: 2px solid var(--colour-primary); outline-offset: 2px; }

/* ---- Themed section cards: white panels on the canvas, each with a coloured
   top accent + a tinted header strip carrying an icon chip. `--section-accent`
   and `--section-wash` are set per theme modifier. ---- */
.region-section {
  --section-accent: var(--colour-primary);
  --section-wash: var(--colour-primary-alpha-10);
  background: var(--colour-bg);
  border: 1px solid var(--colour-border);
  border-top: 3px solid var(--section-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin: 0 0 var(--space-6);
  overflow: hidden;
  scroll-margin-top: 4.5rem; /* clears the sticky nav on jump */
}
.region-section__head {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--section-wash);
  border-bottom: 1px solid var(--colour-border);
}
.region-section__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 3rem; height: 3rem; flex: none; border-radius: var(--radius-md);
  background: var(--section-accent); color: var(--colour-bg);
  font-size: var(--text-xl); box-shadow: var(--shadow-sm);
}
.region-section__titles { min-width: 0; }
.region-section__title { font-size: var(--text-xl); font-weight: var(--fw-bold); color: var(--colour-text); margin: 0; letter-spacing: -0.01em; }
.region-section__lead { font-size: var(--text-sm); color: var(--colour-text-muted); margin: 2px 0 0; line-height: var(--leading-snug); }
.region-section__body { padding: var(--space-5); }
.region-section__body > *:last-child { margin-bottom: 0; }
/* Sub-heading inside a section body (e.g. "Constituency MPs", "By constituency") */
.region-subhead {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-base); font-weight: var(--fw-bold); color: var(--colour-text);
  margin: var(--space-5) 0 var(--space-3);
}
.region-subhead i { color: var(--section-accent); font-size: var(--text-sm); }
.region-section__body > .region-subhead:first-child { margin-top: 0; }

/* Theme palette (accent solid + faint header wash) */
.region-section--reps     { --section-accent: var(--colour-secondary); --section-wash: var(--colour-success-bg); }
.region-section--election { --section-accent: var(--colour-primary);   --section-wash: var(--colour-danger-bg); }
.region-section--activity { --section-accent: var(--colour-info);      --section-wash: var(--colour-info-bg); }
.region-section--ngcdf    { --section-accent: var(--colour-warning);   --section-wash: var(--colour-warning-bg); }
.region-section--gaps     { --section-accent: var(--colour-text-muted); --section-wash: var(--colour-bg-subtle); }

/* Section stat tiles inherit the theme accent on their number + a drill cue. */
.region-section .stat__num { color: var(--section-accent); }
.region-section .stat--link { position: relative; }
.region-section .stat--link::after {
  content: "\f424"; font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute; top: var(--space-2); right: var(--space-3);
  font-size: var(--text-xs); color: var(--colour-border-strong);
  transition: color var(--motion-fast) var(--ease-standard);
}
.region-section .stat--link:hover::after,
.region-section .stat--link:focus-visible::after { color: var(--section-accent); }

/* ---- Peer-comparison block (rendered inside the drawer + optionally inline) ---- */
.region-compare { margin: var(--space-5) 0 0; }
.region-compare__headline {
  display: flex; align-items: baseline; gap: var(--space-2); flex-wrap: wrap;
  margin: 0 0 var(--space-3); font-size: var(--text-base); color: var(--colour-text);
}
.region-compare__rank { font-size: var(--text-2xl); font-weight: var(--fw-extrabold); color: var(--colour-primary); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.region-compare__of { color: var(--colour-text-muted); font-size: var(--text-sm); }
/* Distribution track: min -> max, with a marker for THIS region + a median tick. */
.region-compare__track {
  position: relative; height: 12px; margin: var(--space-5) 0 var(--space-2);
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--colour-lighter), var(--colour-primary-alpha-20));
}
.region-compare__median {
  position: absolute; top: -4px; bottom: -4px; width: 2px; border-radius: 2px;
  background: var(--colour-border-strong);
}
.region-compare__marker {
  position: absolute; top: 50%; width: 16px; height: 16px; border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--colour-primary); border: 3px solid var(--colour-bg);
  box-shadow: 0 0 0 1px var(--colour-primary), var(--shadow-sm);
}
.region-compare__scale { display: flex; justify-content: space-between; font-size: var(--text-xs); color: var(--colour-text-muted); }
.region-compare__leaders { list-style: none; margin: var(--space-4) 0 0; padding: 0; }
.region-compare__leaders li { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3); padding: var(--space-2) 0; border-bottom: 1px solid var(--colour-border); font-size: var(--text-sm); }
.region-compare__leaders li:last-child { border-bottom: 0; }
.region-compare__leaders .is-self { font-weight: var(--fw-bold); color: var(--colour-primary); }
.region-compare__leaders .val { color: var(--colour-text-muted); font-variant-numeric: tabular-nums; }
.region-compare__note { font-size: var(--text-xs); color: var(--colour-text-muted); margin: var(--space-3) 0 0; }

/* Drawer breakdown: a compact figure above the member/row list. */
.drawer-metric__figure { display: flex; align-items: baseline; gap: var(--space-2); margin: 0 0 var(--space-2); }
.drawer-metric__num { font-size: var(--text-3xl); font-weight: var(--fw-extrabold); color: var(--colour-primary); line-height: 1; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.drawer-metric__unit { font-size: var(--text-sm); color: var(--colour-text-muted); }
.drawer-section-title { font-size: var(--text-sm); font-weight: var(--fw-bold); text-transform: uppercase; letter-spacing: .04em; color: var(--colour-text-muted); margin: var(--space-5) 0 var(--space-2); }

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .region-section__head { padding: var(--space-4); gap: var(--space-3); }
  .region-section__icon { width: 2.5rem; height: 2.5rem; font-size: var(--text-lg); }
  .region-section__body { padding: var(--space-4); }
  .region-nav { gap: var(--space-1); }
  .region-nav__link { padding: var(--space-1) var(--space-3); font-size: var(--text-xs); }
}

/* ---- "Data gaps": deliberate known-absence notes (not empty placeholders) ---- */
.region-gaps { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.region-gap {
  padding: var(--space-4);
  border: 1px solid var(--colour-border);
  border-left: 3px solid var(--colour-border-strong);
  border-radius: var(--radius-md);
  background: var(--colour-bg);
}
.region-gap__title { font-weight: var(--fw-bold); color: var(--colour-text); margin-bottom: var(--space-1); }
.region-gap__detail { margin: 0; color: var(--colour-text-muted); font-size: var(--text-sm); }

/* ---- Motion: respect reduced-motion for the nav/scroll + hover transforms ---- */
@media (prefers-reduced-motion: reduce) {
  html:has(.region-page) { scroll-behavior: auto; }
  .region-section, .region-kpi, .region-nav__link { transition: none; }
}