/* ── Project 03 Case Study ── */
.case-main {
  padding-top: 5rem;
}

/* Hero */
.case-hero {
  position: relative;
  padding: 4rem 0 3rem;
  background:
    radial-gradient(ellipse 60% 50% at 75% 0%, rgba(232, 168, 124, 0.12), transparent),
    radial-gradient(ellipse 50% 40% at 10% 40%, rgba(100, 140, 200, 0.08), transparent);
}

.case-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.case-breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}

.case-breadcrumb a:hover {
  color: var(--accent);
}

.case-breadcrumb span[aria-current] {
  color: var(--accent);
  font-weight: 600;
}

.case-eyebrow {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.case-title {
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.75rem;
}

.case-lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 60ch;
  margin-bottom: 2.5rem;
}

/* Stats */
.case-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.case-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.25rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.case-stats strong {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.case-stats span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Tags */
.case-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.case-tags li {
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
  background: var(--accent-soft);
  border: 1px solid rgba(232, 168, 124, 0.25);
  border-radius: 999px;
  color: var(--accent);
}

/* Body */
.case-body {
  width: min(900px, 92vw);
}

.case-section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--border);
}

.case-section:first-child {
  border-top: none;
}

.case-section-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.case-section h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.case-subhead {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 1.25rem;
  color: var(--text);
}

.case-section p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.85;
}

.case-section strong {
  color: var(--text);
  font-weight: 600;
}

.case-section code {
  font-family: "DM Sans", monospace, sans-serif;
  font-size: 0.88em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
}

/* Figures */
.case-figure {
  margin: 1.5rem 0;
}

.case-figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
}

.case-figure--wide img {
  padding: 1rem;
  height: auto;
  object-fit: contain;
}

.case-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.case-figure--photo img {
  padding: 0;
  background: var(--bg-elevated);
  height: auto;
  object-fit: contain;
}

/* Grid */
.case-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin: 1.5rem 0;
}

.case-text-block h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.case-text-block p {
  margin-bottom: 1rem;
}

/* Lists */
.case-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.case-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.case-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.case-list--check li::before {
  content: "✓";
  font-size: 0.9em;
}

/* Callout */
.case-callout {
  background: var(--bg-elevated);
  border: 1px solid rgba(232, 168, 124, 0.3);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  margin: 2rem 0 0.5rem;
}

.case-callout h3 {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.case-callout p {
  margin-bottom: 0;
}

/* Compare columns */
.case-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}

.case-compare-col {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.case-compare-col h4 {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.case-compare-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.case-compare-col li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 1.3rem;
  position: relative;
  line-height: 1.6;
}

.case-compare-col--bad {
  border-color: rgba(220, 120, 120, 0.3);
}

.case-compare-col--bad li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: #d88;
}

.case-compare-col--good {
  border-color: rgba(120, 200, 150, 0.3);
}

.case-compare-col--good li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #8c8;
}

/* Challenges */
.case-challenges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.case-challenge {
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.case-challenge:hover {
  border-color: rgba(232, 168, 124, 0.35);
}

.case-challenge h4 {
  font-size: 0.98rem;
  margin-bottom: 0.6rem;
  color: var(--accent);
}

.case-challenge p {
  font-size: 0.9rem;
  margin-bottom: 0;
  line-height: 1.7;
}

/* Tables */
.case-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.case-table th,
.case-table td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

.case-table thead th {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.case-table td {
  color: var(--text-muted);
}

.case-table tbody tr:hover td {
  color: var(--text);
}

.case-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.case-table--full {
  min-width: 560px;
}

.case-table--full th,
.case-table--full td {
  padding: 0.85rem 1.1rem;
}

.case-note {
  font-size: 0.92rem;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--accent);
}

/* Actions */
.case-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 0 4rem;
  width: min(900px, 92vw);
}

/* Phases / steps */
.case-phases {
  list-style: none;
  counter-reset: phase;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1.25rem 0 2rem;
  padding: 0;
}

.case-phases li {
  counter-increment: phase;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  padding: 1rem 1.25rem 1rem 3rem;
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.92rem;
}

.case-phases li::before {
  content: counter(phase);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 50%;
}

.case-phases li strong {
  color: var(--text);
  font-weight: 600;
}

/* Timeline — research journey */
.case-timeline {
  margin: 2rem 0 2.5rem;
  border-left: 2px solid rgba(232, 168, 124, 0.35);
  padding-left: 1.75rem;
}

.case-timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.case-timeline-item:last-child {
  padding-bottom: 0;
}

.case-timeline-item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  margin-left: -6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.case-timeline-phase {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.case-timeline-item h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.55rem;
  line-height: 1.4;
}

.case-timeline-item p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.case-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 1.25rem 0 0.5rem;
}

.case-platform {
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.case-platform h4 {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.case-platform p {
  font-size: 0.9rem;
  margin-bottom: 0;
  line-height: 1.7;
}

/* Language toggle — after About, outside mobile drawer */
.nav-end {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.lang-toggle {
  flex-shrink: 0;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(232, 168, 124, 0.35);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.lang-toggle:hover {
  background: rgba(232, 168, 124, 0.22);
  border-color: var(--accent);
}

/* Mobile */
@media (max-width: 768px) {
  .nav-end {
    gap: 0.75rem;
  }

  .case-main {
    padding-top: 4.25rem;
  }

  .case-hero {
    padding: 2.25rem 0 1.75rem;
  }

  .case-breadcrumb {
    margin-bottom: 1rem;
  }

  .case-title {
    margin-bottom: 1rem;
  }

  .case-lead {
    margin-bottom: 1.25rem;
  }

  .case-stats {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .case-stats li {
    padding: 0.9rem 1rem;
  }

  .case-grid-2,
  .case-compare,
  .case-challenges,
  .case-grid-3 {
    grid-template-columns: 1fr;
  }

  .case-section {
    padding: 2rem 0;
  }
}

.case-callout--note {
  border-color: rgba(232, 168, 124, 0.35);
  background: rgba(232, 168, 124, 0.06);
  margin-bottom: 2.5rem;
}