/* ==========================================================================
   Syllabus pair: /law-optional-upsc-syllabus (page A) and
   /upsc-law-optional-syllabus-analysis (page B).
   Page head, breadcrumb, "at a glance" cards, phone jump bar with Subjects
   panel, desktop sticky rail, paper blocks with numbered topic lists, PDF
   card, next-step tiles, FAQ accordion, course cards, "also read" strip,
   analysis cards. Requires tokens.css + base.css. Mobile-first (base 360),
   enhanced at 640 / 960 / 1200.
   (.page-head, .crumbs, .faq, .also, .next-* mirror prev-papers.css / notes.css:
    see pages/syllabus/SHARED_REQUESTS.md)
   ========================================================================== */

/* Page head ------------------------------------------------------------ */
.page-head { padding-block: var(--s-3) var(--s-4); border-bottom: 1px solid var(--c-line); }
.page-head__inner { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s-3); }
.page-head__text { display: grid; gap: var(--s-2); min-width: 0; }
.page-head__kicker {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-red-text);
}
.page-head__title { font-size: var(--fs-h1); }
.page-head__intro { max-width: 70ch; color: var(--c-text-muted); }
.page-head__intro a { color: var(--c-link-text); }
.page-head__actions { min-width: 0; }
.btn__icon { width: 18px; height: 18px; flex: 0 0 auto; }

/* Breadcrumb */
.crumbs ol { display: flex; flex-wrap: wrap; gap: 0 var(--s-1); font-size: var(--fs-sm); color: var(--c-text-muted); }
.crumbs li + li::before { content: "\203A"; margin-right: var(--s-1); color: var(--c-text-muted); }
.crumbs a { color: var(--c-link-text); text-decoration: none; display: inline-flex; align-items: center; min-height: 28px; }
.crumbs a:hover { text-decoration: underline; }

@media (min-width: 960px) {
  .page-head { padding-block: var(--s-4) var(--s-5); }
  .page-head__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "crumbs crumbs" "text actions";
    column-gap: var(--s-6);
    row-gap: var(--s-3);
  }
  .page-head__inner > .crumbs { grid-area: crumbs; }
  .page-head__text { grid-area: text; }
  .page-head__actions { grid-area: actions; align-self: start; justify-self: end; width: 280px; padding-top: var(--s-1); }
  .page-head__actions .btn-row { flex-direction: column; }
  .page-head__actions .btn { width: 100%; }
}

/* At a glance: one card per paper, parts and subject rows with topic counts */
.glance__card { gap: var(--s-2); }
.glance__part { display: grid; gap: var(--s-1); }
.glance__label {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}
.glance__list { display: grid; gap: var(--s-1); }
.glance__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  min-height: var(--tap-min);
  padding: 0.5rem 0.75rem;
  color: var(--c-text);
  background: var(--c-white);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}
.glance__link:hover { background: var(--c-slate); color: var(--c-white); }
.glance__name { flex: 1 1 auto; min-width: 0; font-family: var(--ff-display); }
.glance__count { flex: 0 0 auto; font-size: var(--fs-sm); color: var(--c-text-muted); white-space: nowrap; }
.glance__link:hover .glance__count { color: inherit; }
.glance__total { font-size: var(--fs-sm); color: var(--c-text-muted); }

/* Body layout: jump bar + content on phones; sticky rail + content from 960 */
.syl-body { padding-block: var(--s-4) var(--section-pad); }
.syl-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s-4); }
.syl-rail { display: none; }
.syl-content { display: grid; gap: var(--s-6); min-width: 0; }

/* Phone jump bar: sticky, full-bleed, Paper I | Paper II | Subjects ▾ ---- */
.syl-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  margin-inline: calc(-1 * var(--gutter));
  padding: var(--s-1) var(--gutter);
  background: var(--c-white);
  border-block: 1px solid var(--c-line);
}
.syl-bar__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: var(--s-1);
  align-items: stretch;
}
.syl-seg,
.syl-bar__summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: var(--tap-min);
  padding: 0 var(--s-2);
  font-family: var(--ff-display);
  font-size: 1rem;
  color: var(--c-slate);
  background: var(--c-white);
  border: 1px solid var(--c-slate);
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--ease), color var(--ease);
}
.syl-seg:hover,
.syl-bar__summary:hover { background: var(--c-surface); color: var(--c-charcoal); }
.syl-seg[aria-current="true"] { background: var(--c-slate); color: var(--c-white); }
.syl-bar__summary { list-style: none; height: 100%; }
.syl-bar__summary::-webkit-details-marker { display: none; }
.syl-bar__summary::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--ease);
}
.syl-bar__subjects[open] .syl-bar__summary { background: var(--c-slate); color: var(--c-white); }
.syl-bar__subjects[open] .syl-bar__summary::after { transform: rotate(-135deg); margin-top: 4px; }

/* Subjects panel: a sheet under the bar, full width of the bar */
.syl-bar__panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  display: grid;
  gap: var(--s-2);
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding: var(--s-2) var(--gutter) var(--s-3);
  background: var(--c-white);
  border-bottom: 1px solid var(--c-line);
  box-shadow: var(--shadow-card-hover);
}
.syl-bar__group { display: grid; gap: 4px; }
.syl-bar__group__title,
.syl-rail__group__title {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min);
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  text-decoration: none;
}
.syl-bar__group__title:hover,
.syl-rail__group__title:hover { color: var(--c-slate); text-decoration: underline; }
.syl-bar__group__title[aria-current="true"],
.syl-rail__group__title[aria-current="true"] { color: var(--c-red-text); }
.syl-bar__group__list,
.syl-rail__group__list { display: grid; gap: 2px; }
.syl-bar__link,
.syl-rail__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  min-height: var(--tap-min);
  padding: 0.5rem 0.75rem;
  font-family: var(--ff-display);
  font-size: 1rem;
  color: var(--c-slate);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}
.syl-bar__link:hover,
.syl-rail__link:hover { background: var(--c-surface); color: var(--c-charcoal); }
.syl-bar__link[aria-current="true"],
.syl-rail__link[aria-current="true"] { background: var(--c-slate); color: var(--c-white); }
.syl-bar__link__n,
.syl-rail__link__n { font-size: var(--fs-sm); color: var(--c-text-muted); }
.syl-bar__link[aria-current="true"] .syl-bar__link__n,
.syl-rail__link[aria-current="true"] .syl-rail__link__n { color: inherit; }

/* Desktop rail --------------------------------------------------------- */
.syl-rail__label {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}
.syl-rail__group { display: grid; gap: 2px; }
.syl-rail__foot { display: grid; padding-top: var(--s-1); border-top: 1px solid var(--c-line); }
.syl-rail__foot .link-more { color: var(--c-link-text); }
.syl-rail__foot .link-more:hover { color: var(--c-slate); }

@media (min-width: 960px) {
  .syl-body { padding-block: var(--s-5) var(--section-pad); }
  .syl-layout { grid-template-columns: 272px minmax(0, 1fr); gap: var(--s-6); align-items: start; }
  .syl-bar { display: none; }
  .syl-rail {
    display: grid;
    gap: var(--s-2);
    position: sticky;
    top: var(--s-3);
    max-height: calc(100vh - var(--s-6));
    overflow-y: auto;
    padding: var(--s-2);
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
  }
  .syl-content { gap: var(--s-8); }
}

/* Paper blocks and subject cards ----------------------------------------- */
.syl-paper { display: grid; gap: var(--s-3); scroll-margin-top: 72px; }
.syl-paper__head { display: grid; gap: var(--s-1); padding-bottom: var(--s-2); border-bottom: 3px solid var(--c-red); }
.syl-paper__title { font-size: var(--fs-h2); }
.syl-paper__meta { color: var(--c-text-muted); max-width: 70ch; }
.syl-part { display: grid; gap: var(--s-2); }
.syl-part__label {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  scroll-margin-top: 72px;
}
.subject { scroll-margin-top: 72px; }
.subject__meta { font-size: var(--fs-sm); color: var(--c-text-muted); }

/* Numbered topic list: numbers in a fixed column so wrapped lines align */
.topics { counter-reset: topic; display: grid; gap: var(--s-1); }
.topics > li {
  counter-increment: topic;
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  column-gap: 0;
  padding-block: 2px;
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  overflow-wrap: anywhere;
}
.topics > li::before {
  content: counter(topic) ".";
  font-family: var(--ff-display);
  color: var(--c-red-text);
  text-align: right;
  padding-right: 0.6rem;
}
.topics__sub { grid-column: 2; display: grid; gap: 2px; margin-top: 4px; padding-left: var(--s-2); border-left: 2px solid var(--c-line); }
.topics__sub li { color: var(--c-text); }

.subject__foot { align-items: center; }
.subject__links { display: flex; flex-wrap: wrap; gap: 0 var(--s-3); }
.subject__top {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  min-height: var(--tap-min);
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  text-decoration: none;
}
.subject__top::after { content: "\2191"; }
.subject__top:hover { color: var(--c-slate); text-decoration: underline; }

@media (min-width: 960px) {
  .syl-paper, .syl-part__label, .subject { scroll-margin-top: var(--s-3); }
}

/* PDF card ----------------------------------------------------------------- */
#pdf { scroll-margin-top: 72px; }
.pdf-card { max-width: 760px; margin-inline: auto; text-align: center; align-items: center; }
.pdf-card__title { font-size: var(--fs-h2); }
.pdf-card .card__body { max-width: 60ch; }
.pdf-card .card__body a { color: var(--c-link-text); }
.pdf-card__actions { justify-content: center; width: 100%; margin-top: var(--s-1); }

/* FAQ accordion (native details) ------------------------------------------ */
.faq { display: grid; gap: var(--s-1); max-width: 860px; margin-inline: auto; }
.faq__item {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: border-color var(--ease);
}
.faq__item[open] { border-color: var(--c-slate); }
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  min-height: var(--tap-min);
  padding: var(--s-2) var(--s-3);
  font-family: var(--ff-display);
  font-size: 1.0625rem;
  line-height: var(--lh-snug);
  color: var(--c-slate);
  cursor: pointer;
  list-style: none;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after {
  content: "+";
  flex: 0 0 auto;
  width: 24px;
  font-size: 1.5rem;
  line-height: 1;
  text-align: center;
  color: var(--c-red-text);
}
.faq__item[open] .faq__q::after { content: "\2212"; }
.faq__q:hover { color: var(--c-charcoal); }
.faq__a { padding: 0 var(--s-3) var(--s-3); }
.faq__a a { color: var(--c-link-text); }

/* Next step: course cards, buttons, telegram line ------------------------- */
.next-grid { max-width: 760px; margin-inline: auto; }
.next-actions { justify-content: center; margin-top: var(--s-4); }
.next-telegram { margin-top: var(--s-3); text-align: center; color: var(--c-text-muted); font-size: var(--fs-sm); }
.next-telegram a { display: inline-flex; align-items: center; min-height: var(--tap-min); color: var(--c-link-text); }

/* Also read: bordered link rows, 1 → 2 → 3 columns ------------------------ */
.also__list { display: grid; gap: var(--s-1); }
.also__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-1);
  min-height: var(--tap-min);
  padding: 0.5rem var(--s-2);
  font-family: var(--ff-display);
  font-size: 1rem;
  color: var(--c-slate);
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color var(--ease), background var(--ease), color var(--ease);
}
.also__link::after { content: "\2192"; color: var(--c-red-text); transition: transform var(--ease); }
.also__link:hover { border-color: var(--c-slate); color: var(--c-charcoal); }
.also__link:hover::after { transform: translateX(3px); }
@media (min-width: 640px) {
  .also__list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-2); }
}
@media (min-width: 960px) {
  .also__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ===== Page B: analysis hub ============================================= */

/* How to use panel (same pattern as the notes page) */
.an-how { padding-block: var(--s-4); }
.an-how__panel {
  display: grid;
  gap: var(--s-3);
  padding: var(--s-3);
  background: var(--c-surface);
  border-left: 4px solid var(--c-red-text);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.an-how__title { font-size: var(--fs-h3); color: var(--c-charcoal); }
.an-how__text p { max-width: 62ch; }
.an-how__caption {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-slate);
  margin-bottom: var(--s-1);
}
.checks { display: grid; gap: var(--s-1); }
.checks li { display: flex; align-items: flex-start; gap: var(--s-1); }
.checks__icon { flex: 0 0 auto; width: 22px; height: 22px; margin-top: 2px; color: var(--c-red-text); }
@media (min-width: 960px) {
  .an-how { padding-block: var(--s-6) var(--s-4); }
  .an-how__panel { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: var(--s-6); padding: var(--s-4); }
}

/* Seven analyses grouped by paper */
.an-papers { display: grid; gap: var(--s-4); }
.an-paper { display: grid; gap: var(--s-2); }
.an-paper__label {
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  color: var(--c-slate);
}
.an-paper__n { font-size: var(--fs-sm); font-family: var(--ff-body); color: var(--c-text-muted); }
.an-card__meta { font-size: var(--fs-sm); color: var(--c-text-muted); }
/* two links stacked on every card, so the 3-up and 4-up rows look the same */
.an-card .card__foot { flex-direction: column; align-items: flex-start; gap: 0; }
.an-card__syl {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min);
  font-size: var(--fs-sm);
  color: var(--c-link-text);
}
.an-card__syl:hover { color: var(--c-slate); }
@media (min-width: 960px) {
  .an-papers { gap: var(--s-5); }
  /* keep the 4-up row readable: tighter gap already set by .grid--4 */
}

/* "Last updated" line under the page intro */
.syl-updated { margin-top: var(--s-2, .5rem); font-size: .875rem; color: var(--c-text-muted); }