/* layout.css — containers, sections, type scale, utilities, reveal */

html { scroll-behavior: smooth; }

.skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  background: var(--bg);
  color: var(--accent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  z-index: 100;
}
.skip:focus { top: var(--space-2); }

.container,
.container-wide {
  width: 100%;
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left, 0px));
}
.container { max-width: calc(var(--container-max) + 2 * var(--gutter)); }
.container-wide { max-width: calc(var(--container-wide) + 2 * var(--gutter)); }

.section { padding-block: var(--section-pad-y); }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--bg-dark); color: var(--text-on-dark); }
.section--dark .muted { color: var(--text-on-dark-secondary); }
.section--dark a:not(.btn) { color: var(--accent-on-dark); }

/* ---- Type ---- */
h1, h2, h3, h4 { margin: 0; font-weight: var(--weight-semibold); }

.title-page {
  font-size: var(--fs-page-title);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  font-weight: var(--weight-bold);
}
.title-section {
  font-size: var(--fs-section);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
}
.title-card {
  font-size: var(--fs-card);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
}
.body { font-size: var(--fs-body); line-height: var(--lh-body); }
.small { font-size: var(--fs-small); line-height: var(--lh-body); }
.fine { font-size: var(--fs-fine); line-height: var(--lh-body); color: var(--text-secondary); }
.muted { color: var(--text-secondary); }
.gold { color: var(--brand-gold); }

.kw { color: var(--brand-gold); }

p { margin: 0; }
p + p { margin-top: var(--space-4); }

/* Footnote markers: superscript attached to the claim */
sup.fn {
  font-size: 0.6em;
  line-height: 0;
  vertical-align: super;
  margin-left: 1px;
}
sup.fn + sup.fn { margin-left: 3px; }
sup.fn a { color: inherit; opacity: 0.7; text-decoration: none; }
sup.fn a:hover { opacity: 1; text-decoration: underline; }

/* ---- Section header: headline left, optional action right ---- */
.section-head {
  display: grid;
  gap: var(--space-5);
  align-items: end;
  margin-bottom: var(--title-gap);
}
.section-head__text { max-width: 44rem; }
.section-head__lede { margin-top: var(--space-4); color: var(--text-secondary); font-size: var(--fs-lede); }
.section--dark .section-head__lede { color: var(--text-on-dark-secondary); }
.section-head__action { justify-self: start; }
@media (min-width: 834px) {
  .section-head { grid-template-columns: 1fr auto; }
  .section-head__action { justify-self: end; align-self: start; padding-top: var(--space-2); }
}
.section-head--center { text-align: center; justify-items: center; }
.section-head--center .section-head__text { margin-inline: auto; }

/* ---- Grids ---- */
.grid { display: grid; gap: var(--space-4); }
@media (min-width: 834px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--bento { grid-template-columns: 2fr 1fr; }
}

/* ---- Statement (dark, centered) ---- */
.statement {
  text-align: center;
  max-width: 56rem;
  margin-inline: auto;
}
.statement .title-section { font-size: var(--fs-page-title); font-weight: var(--weight-bold); }
.statement__body {
  max-width: 40rem;
  margin: var(--space-6) auto 0;
  font-size: var(--fs-lede);
  color: var(--text-on-dark-secondary);
}

/* ---- Definition list used by the scorecard ---- */
.measures {
  display: grid;
  gap: var(--space-6) var(--space-7);
  margin: 0;
}
@media (min-width: 834px) { .measures { grid-template-columns: repeat(3, 1fr); } }
.measures__item { max-width: 22rem; }
.measures__term { font-weight: var(--weight-semibold); }
.measures__desc { margin: var(--space-2) 0 0; color: var(--text-secondary); }

/* ---- Segmented control ---- */
.segmented {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--control-bg);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-7);
}
.segmented button {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--fs-small);
  padding: var(--space-2) var(--space-5);
  min-height: 36px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}
.segmented button[aria-pressed="true"] {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: var(--weight-semibold);
}

/* ---- Numbered list on dark ---- */
.questions {
  list-style: none;
  counter-reset: q;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-5);
}
.questions li {
  counter-increment: q;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-3);
  color: var(--text-on-dark);
}
.questions li::before {
  content: "0" counter(q);
  color: var(--text-on-dark-secondary);
  font-size: var(--fs-small);
  font-weight: var(--weight-semibold);
  padding-top: 2px;
}

/* ---- Select (workflow picker) ---- */
.select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  min-height: var(--tap-target);
  font: inherit;
  font-size: var(--fs-body);
  color: var(--text);
  background: var(--bg-elevated);
  border: 0;
  border-radius: var(--radius-card-sm);
  padding: var(--space-3) var(--space-7) var(--space-3) var(--space-4);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-secondary) 50%),
    linear-gradient(135deg, var(--text-secondary) 50%, transparent 50%);
  background-position: calc(100% - 22px) 50%, calc(100% - 16px) 50%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
}

/* ---- Scroll-in reveal ---- */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---- Sub-page header ---- */
.page-head { padding: clamp(56px, 8vw, 96px) 0 var(--space-7); }
.page-head__eyebrow {
  font-size: var(--fs-small);
  font-weight: var(--weight-semibold);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}
.page-head__lede {
  font-size: var(--fs-lede);
  color: var(--text-secondary);
  max-width: 40rem;
  margin-top: var(--space-5);
}

/* ---- Tabs (segmented control that scrolls on narrow screens) ---- */
.tabs { margin-bottom: var(--space-7); }
.tabs__list {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: var(--control-bg);
  border-radius: var(--radius-pill);
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs__list::-webkit-scrollbar { display: none; }
.tabs__list button {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--fs-small);
  padding: var(--space-2) var(--space-5);
  min-height: 36px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}
.tabs__list button[aria-selected="true"] {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: var(--weight-semibold);
}
[role="tabpanel"][hidden] { display: none; }

/* ---- Two-column responsibilities ---- */
.split { display: grid; gap: var(--space-4); }
@media (min-width: 834px) { .split { grid-template-columns: 1fr 1fr; } }
.plain-list { margin: var(--space-4) 0 0; padding: 0; list-style: none; display: grid; gap: var(--space-3); }
.plain-list li { padding-left: var(--space-4); position: relative; color: var(--text-secondary); }
.plain-list li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 6px; height: 6px; border-radius: 50%; background: var(--text); opacity: 0.35; }
.card--dark .plain-list li, .card--on-dark .plain-list li { color: var(--text-on-dark-secondary); }
.card--dark .plain-list li::before, .card--on-dark .plain-list li::before { background: var(--text-on-dark); }

/* ---- Minimal table (illustrative scorecard) ---- */
.table { width: 100%; border-collapse: collapse; font-size: var(--fs-small); }
.table th, .table td { text-align: left; padding: var(--space-3) var(--space-4); vertical-align: top; }
.table th { font-size: var(--fs-fine); text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); font-weight: var(--weight-semibold); }
.table tbody tr:nth-child(odd) td { background: var(--bg-alt); }
.table tbody tr td:first-child { font-weight: var(--weight-semibold); }
.table tbody tr:first-child td:first-child { border-top-left-radius: var(--radius-card-sm); }
.table tbody tr:first-child td:last-child { border-top-right-radius: var(--radius-card-sm); }
.table-wrap { overflow-x: auto; }

/* ---- Prose block for research findings ---- */
.prose { max-width: 44rem; }
.prose h3 { font-size: var(--fs-card); line-height: var(--lh-snug); letter-spacing: var(--ls-tight); margin: var(--space-8) 0 var(--space-4); }
.prose h3:first-child { margin-top: 0; }
.prose p + p { margin-top: var(--space-4); }
.prose .lead { color: var(--text); font-weight: var(--weight-semibold); }