/* ---------- Case study hero ---------- */

.case-hero {
  background: var(--white);
  padding: 60px 0 20px;
}

.case-container {
  max-width: 820px;
}

.case-meta {
  font-family: var(--sans);
  color: var(--text-gray);
  font-size: 0.9rem;
  margin: 0 0 8px;
}

.case-hero h1 {
  margin: 0;
}

/* ---------- Case study body ---------- */

.case-body {
  background: var(--white);
  padding: 24px 0 20px;
}

.case-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 56px;
  align-items: start;
}

.case-sidebar {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
}

.case-back {
  display: inline-block;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 28px;
}

.case-toc {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-toc a {
  color: var(--navy);
  font-size: 0.95rem;
}

.case-toc a:hover,
.case-toc a.active {
  color: var(--blue);
}

.case-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--bg-lavender);
}

.case-links a {
  color: var(--blue);
  font-weight: 600;
  font-size: 0.95rem;
}

.case-links a:hover {
  text-decoration: underline;
}

.case-main {
  min-width: 0;
  max-width: 900px;
}

.case-block {
  padding: 0 0 72px;
  scroll-margin-top: 100px;
}

.case-block h2 {
  font-size: 1.7rem;
  margin: 0 0 24px;
  max-width: 720px;
}

.case-intro {
  color: var(--navy);
  font-size: 1.05rem;
  margin: 32px 0 64px;
}

.case-lead {
  color: var(--navy);
  font-size: 1.05rem;
  margin: 0 0 28px;
}

.section-label {
  display: block;
  font-family: var(--sans);
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  font-weight: 700;
  margin: 0 0 12px;
}

/* ---------- Media placeholders ---------- */

.media-placeholder {
  background: var(--bg-light);
  border: 1px dashed #c9c9cc;
  border-radius: 8px 32px 8px 8px;
  color: var(--text-gray);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.video-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-bottom: 0;
  object-fit: cover;
  border-radius: 8px 8px 8px 8px;
}

.case-meta-grid {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}

.case-meta-grid-3 {
  grid-template-columns: repeat(3, auto);
}

.case-meta-label {
  display: block;
  font-family: var(--sans);
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.case-meta-value {
  color: var(--text-gray);
  font-size: 1rem;
  margin: 0;
  line-height: 1.4;
}

/* ---------- Problem ---------- */

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: stretch;
}

.problem-text p {
  color: var(--navy);
  font-size: 1.05rem;
  margin: 0 0 20px;
}

.problem-text p:last-child {
  margin-bottom: 0;
}

.problem-text a {
  color: var(--blue);
  text-decoration: underline;
}

.problem-media {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  border-radius: 8px 8px 8px 8px;
}

/* ---------- Solution ---------- */

.solution-media {
  width: 100%;
  border-radius: 8px 32px 8px 8px;
  margin-top: 24px;
}

/* ---------- Building ---------- */

.tech-chip-row {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 32px;
  width: calc(100% + 180px);
}

.tech-chip {
  flex: 0 0 auto;
  padding: 9px 18px;
  color: var(--white);
  font-weight: 600;
  font-size: 0.9rem;
}

.chip-frontend { background: #ec1ccb; }
.chip-backend { background: #59d1b3; }
.chip-ml { background: #f3af56; }

.code-block {
  background: var(--bg-lavender);
  color: var(--navy);
  font-family: 'SF Mono', 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  padding: 20px 24px;
  border-radius: 8px 32px 8px 8px;
  margin: 0 0 28px;
  white-space: pre-wrap;
  overflow-x: auto;
}

.notebook-cta {
  display: block;
  text-align: center;
  background: var(--bg-lavender);
  color: var(--blue);
  font-weight: 600;
  font-size: 1rem;
  padding: 20px 24px;
  border-radius: 8px 32px 8px 8px;
  margin: 0 0 28px;
  transition: transform 0.15s ease;
}

.notebook-cta:hover {
  transform: translateY(-2px);
}

/* ---------- Learnings ---------- */

.learnings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.learning-col h3 {
  font-size: 1.25rem;
  margin: 0 0 12px;
}

.learning-col p {
  color: var(--navy);
  font-size: 1rem;
  margin: 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .case-layout {
    grid-template-columns: 1fr;
  }

  .case-sidebar {
    position: static;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 24px;
  }

  .case-toc {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }

  .case-links {
    flex-direction: row;
    margin-top: 0;
    padding-top: 0;
    border-top: none;
  }

  .case-meta-grid-3 {
    grid-template-columns: 1fr 1fr;
    row-gap: 20px;
  }

  .problem-grid,
  .learnings-grid {
    grid-template-columns: 1fr;
  }

  .tech-chip-row {
    width: 100%;
  }
}