/* ============================================================
   UP-NS Merger Explainer - shared styles
   Palette: grade-crossing signage
   paper #FFFFFF / ink #15181B / steel #47525B
   warning yellow #F5B70A / signal red #C0392B
   ============================================================ */

:root {
  --paper: #ffffff;
  --paper-dim: #f5f6f5;
  --ink: #15181b;
  --steel: #47525b;
  --steel-light: #9aa4ab;
  --yellow: #f5b70a;
  --yellow-soft: #fdf3d7;
  --red: #c0392b;
  --red-soft: #faeae8;
  --rule: #d9dcde;
  --max: 60rem;
  --serif: "Source Serif 4", Georgia, serif;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.06rem;
  line-height: 1.65;
}

/* Hazard stripe: the site signature */
.hazard {
  height: 10px;
  background: repeating-linear-gradient(
    -45deg,
    var(--ink) 0 14px,
    var(--yellow) 14px 28px
  );
}

/* ---------- header / nav ---------- */
header.site {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.site-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem 1.25rem 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
}
.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.wordmark .x { color: var(--red); }
.docket {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}
nav.site {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}
nav.site ul {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}
nav.site a {
  display: block;
  padding: 0.55rem 0.7rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 3px solid transparent;
}
nav.site a:hover { color: var(--ink); }
nav.site a.here {
  color: var(--ink);
  border-bottom-color: var(--yellow);
}

/* ---------- page scaffolding ---------- */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.2rem 1.25rem 4rem;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 0.4rem;
}
h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0 0 0.6rem;
}
.lede {
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--steel);
  max-width: 44rem;
  margin: 0 0 2rem;
}
h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.7rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 2.6rem 0 0.7rem;
  padding-top: 1.2rem;
  border-top: 3px solid var(--ink);
}
h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 1.6rem 0 0.4rem;
}
p { margin: 0 0 1rem; max-width: 46rem; }
a { color: var(--red); }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

ul.plain { max-width: 46rem; padding-left: 1.2rem; }
ul.plain li { margin-bottom: 0.45rem; }

/* ---------- source lines ---------- */
.src {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--steel);
  margin: -0.4rem 0 1.1rem;
  max-width: 46rem;
}
.src::before { content: "SOURCE \2192  "; letter-spacing: 0.08em; }
.src a { color: var(--steel); }
.src a:hover { color: var(--ink); }

/* ---------- timetable stat rows: signature device ---------- */
.board {
  border: 1px solid var(--ink);
  margin: 1.4rem 0 1.8rem;
}
.board-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--yellow);
  padding: 0.45rem 0.9rem;
}
.board-row {
  display: grid;
  grid-template-columns: minmax(7rem, 12rem) 1fr;
  gap: 1rem;
  padding: 0.8rem 0.9rem;
  border-top: 1px solid var(--rule);
  align-items: baseline;
}
.board-row:first-of-type { border-top: 0; }
.board-num {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.35rem;
  line-height: 1.2;
  white-space: nowrap;
}
.board-num.red { color: var(--red); }
.board-label { font-size: 0.95rem; color: var(--steel); line-height: 1.5; }
@media (max-width: 34rem) {
  .board-row { grid-template-columns: 1fr; gap: 0.15rem; }
}

/* ---------- details / click boxes ---------- */
details.box {
  border: 1px solid var(--steel-light);
  border-left: 5px solid var(--yellow);
  margin: 0 0 0.8rem;
  max-width: 46rem;
  background: var(--paper);
}
details.box[open] { border-left-color: var(--ink); }
details.box > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.75rem 1rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
details.box > summary::-webkit-details-marker { display: none; }
details.box > summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--steel);
  flex: none;
}
details.box[open] > summary::after { content: "\2212"; }
details.box > summary:hover { background: var(--paper-dim); }
details.box .body { padding: 0 1rem 0.9rem; }
details.box .body p:last-child { margin-bottom: 0.4rem; }

/* ---------- callouts ---------- */
.note {
  background: var(--yellow-soft);
  border-left: 5px solid var(--yellow);
  padding: 0.9rem 1.1rem;
  margin: 1.4rem 0;
  max-width: 46rem;
}
.note p:last-child { margin-bottom: 0; }
.alert {
  background: var(--red-soft);
  border-left: 5px solid var(--red);
  padding: 0.9rem 1.1rem;
  margin: 1.4rem 0;
  max-width: 46rem;
}
.alert p:last-child { margin-bottom: 0; }

/* ---------- comparison table ---------- */
table.compare {
  border-collapse: collapse;
  width: 100%;
  margin: 1.2rem 0 1.6rem;
  font-size: 0.95rem;
}
table.compare th {
  font-family: var(--display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.9rem;
  text-align: left;
  background: var(--ink);
  color: var(--paper);
  padding: 0.55rem 0.7rem;
}
table.compare td {
  border: 1px solid var(--rule);
  padding: 0.55rem 0.7rem;
  vertical-align: top;
}
table.compare td.num { font-family: var(--mono); font-size: 0.88rem; white-space: nowrap; }
table.compare tr:nth-child(even) td { background: var(--paper-dim); }
.table-scroll { overflow-x: auto; }

/* ---------- timeline ---------- */
ol.timeline { list-style: none; margin: 1.5rem 0; padding: 0; max-width: 46rem; }
ol.timeline li {
  position: relative;
  padding: 0 0 1.5rem 2rem;
  border-left: 3px solid var(--rule);
  margin-left: 0.4rem;
}
ol.timeline li::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 0.35rem;
  width: 13px;
  height: 13px;
  background: var(--paper);
  border: 3px solid var(--steel);
  border-radius: 50%;
}
ol.timeline li.key { border-left-color: var(--yellow); }
ol.timeline li.key::before { border-color: var(--red); background: var(--red); }
.t-date {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  display: block;
  margin-bottom: 0.15rem;
}
.t-what {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  display: block;
}
.t-detail { font-size: 0.95rem; color: var(--steel); display: block; margin-top: 0.2rem; }

/* ---------- two-column claim/filed ---------- */
.claim-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.2rem 0 0.4rem;
  max-width: 52rem;
}
.claim, .filed { border: 1px solid var(--rule); padding: 0.9rem 1rem; }
.claim { border-top: 4px solid var(--steel-light); }
.filed { border-top: 4px solid var(--red); }
.claim .tag, .filed .tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.4rem;
  color: var(--steel);
}
.filed .tag { color: var(--red); }
.claim p, .filed p { margin-bottom: 0.4rem; font-size: 0.97rem; }
@media (max-width: 40rem) { .claim-pair { grid-template-columns: 1fr; } }

/* ---------- action cards ---------- */
.actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.action-card {
  border: 2px solid var(--ink);
  padding: 1.1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.action-card h3 { margin: 0; }
.action-card p { font-size: 0.95rem; margin: 0; flex: 1; }
.btn {
  display: inline-block;
  font-family: var(--display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--ink);
  color: var(--yellow);
  text-decoration: none;
  padding: 0.55rem 1rem;
  align-self: start;
}
.btn:hover { background: var(--red); color: var(--paper); }

/* ---------- next / prev page footer nav ---------- */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.pager a { text-decoration: none; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--rule);
  background: var(--paper-dim);
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.6rem 1.25rem 2rem;
  font-size: 0.85rem;
  color: var(--steel);
}
.footer-inner p { max-width: none; margin-bottom: 0.5rem; }

/* Call-to-action strip (added Oct 2026) */
.cta-strip { background: var(--yellow); color: var(--ink); border-bottom: 2px solid var(--ink); }
.cta-inner { max-width: 60rem; margin: 0 auto; padding: 0.6rem 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; justify-content: space-between; font-size: 0.92rem; }
.cta-inner a { color: inherit; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; white-space: nowrap; }
.action-card.primary { border-width: 3px; background: var(--yellow-soft); }