/* ═══════════════════════════════════════════
   CASE STUDY PAGE
═══════════════════════════════════════════ */

/* ── SHARED ── */
.cs-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 4rem;
}

.cs-section { padding: 5rem 0; }
.cs-section + .cs-section { border-top: 1px solid var(--ink-faint); }

/* ── PROJECT HERO ── */
.cs-hero {
  position: relative;
  height: 72vh;
  min-height: 480px;
  display: flex;
  align-items: flex-end;
}

.cs-hero-image {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: var(--ink);
}

.cs-hero-image .card-placeholder,
.cs-hero-image img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.cs-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,8,0.85) 0%, rgba(10,10,8,0.1) 60%);
}

.cs-hero-content {
  position: relative;
  z-index: 1;
  padding: 3rem 4rem;
  width: 100%;
}

.cs-back {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}
.cs-back:hover { color: var(--accent); }

.cs-meta-row {
  display: flex; gap: 0.6rem; flex-wrap: wrap;
  margin-bottom: 1rem;
}

.cs-tag {
  font-family: var(--font-mono);
  font-size: 0.55rem; letter-spacing: 0.18em; text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.6);
}

.cs-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: #fff;
}

/* ── OVERVIEW ── */
.cs-overview-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 5rem;
  align-items: start;
}

.cs-lead {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  font-weight: 300; line-height: 1.5;
  color: var(--ink);
  margin: 1rem 0 1.2rem;
}

.cs-overview-aside {
  display: flex; flex-direction: column;
  border-left: 1px solid var(--ink-faint);
  padding-left: 2rem;
  gap: 0;
  padding-top: 0.3rem;
}

.cs-detail {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--ink-faint);
  display: flex; flex-direction: column; gap: 0.3rem;
}

.cs-detail-label {
  font-family: var(--font-mono);
  font-size: 0.55rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink-faint);
}

.cs-detail-value {
  font-size: 0.88rem; font-weight: 300;
  color: var(--ink); line-height: 1.5;
}

/* ── PROCESS STEPS ── */
.cs-process { padding-bottom: 6rem; }

.cs-process .section-label { margin-bottom: 3.5rem; }

.cs-step { margin-bottom: 5rem; }
.cs-step:last-child { margin-bottom: 0; }

/* Step number */
.cs-step-num {
  font-family: var(--font-mono);
  font-size: 0.58rem; letter-spacing: 0.25em;
  color: var(--accent);
  display: block; margin-bottom: 0.5rem;
}

.cs-step-title {
  font-size: 1.15rem; font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.8rem;
  color: var(--ink);
}

.cs-step-body {
  font-size: 0.92rem; font-weight: 300;
  line-height: 1.85; color: var(--ink-mid);
  max-width: 52ch;
}

/* Full-width step: image on top, caption below */
.cs-step--full .cs-step-image {
  width: 100%;
  overflow: hidden;
  background: var(--ink-faint);
  margin-bottom: 1.8rem;
}

.cs-step--full .cs-step-image img,
.cs-step--full .cs-step-image .card-placeholder {
  width: 100%; height: 100%; object-fit: cover;
}

.cs-step--full .cs-step-caption {
  max-width: 640px;
}

/* Split step: text + image side by side */
.cs-step--split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.cs-step--split .cs-step-image {
  overflow: hidden;
  background: var(--ink-faint);
}

.cs-step--split .cs-step-image img,
.cs-step--split .cs-step-image .card-placeholder {
  width: 100%; height: 100%; object-fit: cover;
}

/* Reverse: image left, text right */
.cs-step--reverse {
  direction: rtl;
}
.cs-step--reverse > * { direction: ltr; }

/* ── FINAL ARTWORK ── */
.cs-final .section-label { margin-bottom: 2rem; }

.cs-final-image {
  width: 100%;
  overflow: hidden;
  background: var(--ink-faint);
}

.cs-final-image img,
.cs-final-image .card-placeholder {
  width: 100%; height: 100%; object-fit: cover;
}

/* ── NEXT PROJECT ── */
.cs-next {
  border-top: 1px solid var(--ink-faint);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.cs-prev-inner {
  border-right: 1px solid var(--ink-faint);
  text-align: left;
}

.cs-next-inner {
  text-align: right;
}

.cs-next-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 4rem 2rem;
  transition: background 0.25s;
}

.cs-next-inner:hover { background: rgba(79,146,144,0.04); }

.cs-next-label {
  font-family: var(--font-mono);
  font-size: 0.58rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-faint);
}

.cs-next-title {
  font-size: clamp(1.2rem, 2.5vw, 2rem);
  font-weight: 300; letter-spacing: -0.02em;
  color: var(--ink);
  transition: color 0.2s;
}

.cs-next-inner:hover .cs-next-title { color: var(--accent); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .cs-container { padding: 0 2rem; }
  .cs-hero-content { padding: 2.5rem 2rem; }
  .cs-overview-grid { grid-template-columns: 1fr; gap: 3rem; }
  .cs-overview-aside { border-left: none; border-top: 1px solid var(--ink-faint); padding-left: 0; padding-top: 2rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 2rem; }
  .cs-step--split { gap: 2.5rem; }
}

@media (max-width: 768px) {
  .cs-hero { height: 56vh; }
  .cs-step--split { grid-template-columns: 1fr; gap: 1.5rem; }
  .cs-step--reverse { direction: ltr; }
  .cs-overview-aside { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .cs-container { padding: 0 1.5rem; }
  .cs-hero-content { padding: 2rem 1.5rem; }
  .cs-overview-aside { grid-template-columns: 1fr; }
}