/* ============================================================
   /study-material — sample papers & previous-year papers.
   Page-specific only; reuses tokens.css + site.css components
   (.container .section .card .btn .chip .reel). Breadcrumb +
   CTA rhythm come from the shared course.css also loaded here.
   ============================================================ */

/* ---------- Hero ---------- */
.sm-hero {
  padding-block: clamp(44px, 7vw, 80px);
}
.sm-hero h1 {
  margin-bottom: var(--sp-4);
}
.sm-hero .lead {
  margin-bottom: var(--sp-5);
}
.sm-hero-cta {
  margin-bottom: var(--sp-3);
}
.sm-hero-note {
  margin: 0;
}

/* ---------- Jump nav (exam chips) ---------- */
.sm-jump {
  border-bottom: 1px solid var(--c-line);
  padding-block: var(--sp-3);
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--ground) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(6px);
}
.sm-jump .reel {
  padding-block: 2px;
}
.sm-jump .chip {
  scroll-margin-left: var(--gutter);
}

/* ---------- Exam section ---------- */
.sm-section {
  scroll-margin-top: 72px;   /* clear the sticky jump nav on anchor jump */
}
.sm-section:nth-of-type(even) {
  background: var(--c-tint-peach);
}
.sm-group-head {
  margin-bottom: var(--sp-6);
}
.sm-group-head h2 {
  margin-bottom: var(--sp-2);
}
.sm-group-head p {
  margin: 0;
}

/* ---------- Paper grid ---------- */
.sm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}
@media (min-width: 620px) {
  .sm-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1040px) {
  .sm-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Paper card ---------- */
.paper-card {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "icon body"
    "action action";
  gap: var(--sp-3) var(--sp-4);
  align-items: start;
  background: var(--ground);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--sp-5);
  transition: box-shadow var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.paper-card:hover {
  box-shadow: var(--shadow-pop);
  transform: translateY(-2px);
}

.paper-icon {
  grid-area: icon;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--c-accent-soft);
  color: var(--c-accent-press);
  flex: 0 0 auto;
}

.paper-body {
  grid-area: body;
  min-width: 0;   /* allow long titles to wrap instead of overflow */
}
.paper-title {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semi);
  line-height: 1.35;
  margin: 0 0 var(--sp-3);
  overflow-wrap: anywhere;
}
.paper-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
}
.paper-year {
  font-weight: var(--fw-heavy);
}
.paper-exam {
  letter-spacing: .01em;
}

.paper-action {
  grid-area: action;
  display: flex;
}
.paper-action .btn {
  width: 100%;
}

/* On-request state (paper listed but no file to link) */
.paper-onrequest {
  display: inline-flex;
  align-items: center;
  width: 100%;
  min-height: 40px;
  padding: 8px 18px;
  border: 1px dashed var(--c-line-strong);
  border-radius: var(--radius-pill);
  color: var(--c-ink-2);
  font-size: var(--fs-small);
  font-weight: var(--fw-semi);
  justify-content: center;
}
.paper-card.is-onrequest {
  background: color-mix(in srgb, var(--c-tint-blue) 60%, var(--ground));
}

/* ---------- Closing CTA band ---------- */
.sm-cta-in {
  display: grid;
  gap: var(--sp-5);
  align-items: center;
}
.sm-cta-in .lead {
  margin: 0;
}
.sm-cta-btns {
  margin: 0;
}
@media (min-width: 860px) {
  .sm-cta-in {
    grid-template-columns: 1fr auto;
    gap: var(--sp-7);
  }
}

@media (prefers-reduced-motion: reduce) {
  .paper-card { transition: none; }
  .paper-card:hover { transform: none; }
}