/* Case study pages. Builds on ../style.css (tokens, fonts, tags, section headings, links). */

.cs-page .layout {
  display: block;
  max-width: 46rem;
  padding: 3rem 1.5rem 0;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  transition: color 0.3s var(--ease);
}
.cs-back:hover { color: var(--accent); }

.cs-header { margin: 3rem 0 5rem; }

.cs-kicker {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.cs-title {
  font-family: var(--serif);
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.cs-summary {
  margin: 1.5rem 0 0;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.2vw, 1.75rem);
  line-height: 1.3;
  color: var(--heading);
}

.cs-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  margin: 3rem 0 0;
  border-top: 1px solid var(--line);
}
.cs-meta > div {
  padding: 1rem 1rem 1rem 0;
  border-bottom: 1px solid var(--line);
}
.cs-meta dt {
  margin-bottom: 0.3rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.cs-meta dd { margin: 0; color: var(--heading); font-size: 0.95rem; line-height: 1.5; }
/* Stack spans the full row so tags have room */
.cs-meta > div:has(.tags) { grid-column: 1 / -1; }
.cs-tags { overflow: hidden; }
.cs-meta .tags { color: var(--text); }

.cs-section { margin-bottom: 4.5rem; }
.cs-section p { max-width: 40rem; }
.cs-section ul:not(.tags) {
  margin: 0 0 1.25rem;
  padding: 0;
  border-top: 1px solid var(--line);
}
.cs-section ul:not(.tags) li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.75rem;
  border-bottom: 1px solid var(--line);
}
.cs-section ul:not(.tags) li::before {
  content: "";
  position: absolute;
  left: 0.25rem;
  top: 1.6rem;
  width: 0.6rem;
  height: 1px;
  background: var(--accent);
}

.cs code {
  padding: 0.1rem 0.35rem;
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--heading);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow-wrap: anywhere;
}

.cs-cta { margin-top: 2rem; }
.cs-cta svg { display: inline-block; vertical-align: middle; }

/* Prev / next */
.cs-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 6rem 0 4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cs-pager-link {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.75rem 1rem 1.75rem 0;
  transition: color 0.3s var(--ease);
}
.cs-pager-next {
  align-items: flex-end;
  text-align: right;
  padding: 1.75rem 0 1.75rem 1rem;
  border-left: 1px solid var(--line);
}
.cs-pager-label {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.cs-pager-name {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 3.5vw, 1.75rem);
  line-height: 1.2;
  color: var(--heading);
  transition: color 0.3s var(--ease);
}
.cs-pager-link:hover .cs-pager-name { color: var(--accent); }
.cs-pager-link[rel="prev"] .cs-pager-label::before { content: "\2190  "; }
.cs-pager-link[rel="next"] .cs-pager-label::after { content: "  \2192"; }

@media (min-width: 1024px) {
  .cs-page .layout { padding-top: 5rem; }
  .cs-header { margin: 4rem 0 6rem; }
}