/* ========================================================================
   case-study.css - layout for the individual case-study pages
   Loads after base / components / animations / responsive.
   ======================================================================== */

/* (slim sub-page header styles moved to components.css so blog pages share them) */

/* ---- Hero ---- */
.cs {
  padding-top: clamp(3rem, 8vh, 6rem);
  padding-bottom: clamp(4rem, 10vw, 8rem);
}
.cs-eyebrow { margin-bottom: var(--sp-4); }
.cs-title {
  font-size: clamp(2.4rem, 1.4rem + 4.4vw, 4.4rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
  max-width: 18ch;
}
.cs-summary {
  margin-top: var(--sp-4);
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 54ch;
}

.cs-spec {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
}
.cs-spec > div {
  padding: var(--sp-3) var(--sp-4);
  border-right: 1px solid var(--border);
}
.cs-spec > div:first-child { padding-left: 0; }
.cs-spec > div:last-child { border-right: 0; padding-right: 0; }
.cs-spec dt {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.cs-spec dd {
  margin-top: 0.5rem;
  font-size: var(--fs-meta);
  color: var(--text);
  line-height: 1.5;
}

.cs-visit {
  margin-top: var(--sp-4);
  font-family: var(--font-mono);
}
.cs-visit .arrow { display: inline-block; transition: transform var(--dur) var(--ease); }
.cs-visit a:hover .arrow { transform: translate(3px, -3px); }

.cs-hero-media {
  display: block;
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface-2);
  transition: border-color var(--dur) var(--ease);
}
.cs-hero-media img {
  width: 100%;
  display: block;
  transition: transform 0.6s var(--ease-out);
}
.cs-hero-media--link:hover { border-color: var(--border-strong); }
.cs-hero-media--link:hover img { transform: scale(1.02); }

/* ---- Body ---- */
.cs-body {
  margin-top: clamp(3rem, 7vw, 5.5rem);
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
}
.cs-section {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--sp-3) clamp(1.5rem, 4vw, 3.5rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--border);
}
.cs-section h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.4vw, 1.9rem);
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
}
.cs-section h2 .cs-n {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.cs-section > div { min-width: 0; }
.cs-section p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 60ch;
}
.cs-section p + p { margin-top: var(--sp-2); }

/* Rich case-study bodies: sub-headings, ordered lists and inline code inside
   the Challenge / Solution / Results WYSIWYG. */
.cs-section > div > :first-child { margin-top: 0; }
.cs-section h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 1rem + 0.4vw, 1.28rem);
  letter-spacing: -0.01em;
  color: var(--text);
  margin: var(--sp-4) 0 var(--sp-1);
}
.cs-section h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: var(--sp-3) 0 var(--sp-1);
}
.cs-section ol {
  margin: var(--sp-3) 0;
  padding-left: 1.4rem;
  max-width: 62ch;
  display: grid;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.6;
}
.cs-section strong { color: var(--text); }
.cs-list + p,
.cs-results + p,
.cs-section ol + p { margin-top: var(--sp-3); }
.cs-section code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--text);
  background: var(--surface-2);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  white-space: nowrap;
}

.cs-list {
  margin: var(--sp-3) 0;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  max-width: 62ch;
}
.cs-list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-muted);
}
.cs-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}

.cs-results {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
  max-width: 62ch;
}
.cs-results li {
  padding: var(--sp-3) 0 var(--sp-3) 1.75rem;
  border-bottom: 1px solid var(--border);
  position: relative;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
}
.cs-results li::before {
  content: "\2192";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.cs-tags {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--sp-3);
}
.cs-tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
}

/* ---- Gallery (optional; only present when the project has attached images) ---- */
.cs-gallery {
  margin-top: clamp(3rem, 7vw, 5.5rem);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--col-gap);
}
.cs-gallery figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface-2);
}
.cs-gallery img {
  display: block;
  width: 100%;
  height: auto;
}
@media (max-width: 640px) {
  .cs-gallery { grid-template-columns: 1fr; }
}

/* ---- Prev / next ---- */
.cs-nav {
  margin-top: clamp(3.5rem, 8vw, 6rem);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border-strong);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}
.cs-nav-link {
  display: grid;
  gap: 0.4rem;
  padding: var(--sp-3) 0;
  transition: color var(--dur) var(--ease);
}
.cs-nav-link .cs-nav-dir {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.cs-nav-link .cs-nav-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.cs-nav-link--next { text-align: right; }
.cs-nav-link:hover .cs-nav-title { color: var(--accent-bright); }

/* ---- CTA ---- */
.cs-cta {
  margin-top: clamp(4rem, 9vw, 7rem);
  padding-top: clamp(3rem, 6vw, 4.5rem);
  border-top: 1px solid var(--border);
}
.cs-cta h2 {
  font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3rem);
  letter-spacing: -0.03em;
  max-width: 16ch;
}
.cs-cta p {
  margin-top: var(--sp-3);
  font-size: var(--fs-lead);
  color: var(--text-muted);
  max-width: 46ch;
}
.cs-cta .btn { margin-top: var(--sp-4); }

@media (max-width: 900px) {
  .cs-section { grid-template-columns: 1fr; }
  .cs-spec { grid-template-columns: repeat(2, 1fr); }
  .cs-spec > div { padding: var(--sp-3) var(--sp-4); }
  .cs-spec > div:nth-child(odd) { padding-left: 0; }
  .cs-spec > div:nth-child(even) { border-right: 0; padding-right: 0; }
  .cs-spec > div:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
}
@media (max-width: 560px) {
  .cs-nav { grid-template-columns: 1fr; }
  .cs-nav-link--next { text-align: left; }
}