/* =========================================================================
   Cases page — only the styles unique to /cases.html
   ========================================================================= */
.cases-hero {
  padding: clamp(50px, 6vw, 80px) 0 24px;
  text-align: center;
  background: linear-gradient(180deg, var(--blue-pale), transparent 80%);
}
.cases-title {
  font-size: clamp(34px, 4.5vw, 48px);
  letter-spacing: -1.2px;
  margin: 8px 0 14px;
}
.cases-lead {
  color: var(--text-body);
  font-size: 16px;
  max-width: 720px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

/* nav-link active */
.nav-links a.active { color: var(--blue); font-weight: 600; }

/* filter pills */
.cases-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.cases-filter {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: var(--card);
  color: var(--text-mid);
  border: 1px solid var(--bd);
  cursor: pointer;
  transition: all .2s;
}
.cases-filter:hover { border-color: var(--blue-border); color: var(--blue-deep); }
.cases-filter.active {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
  box-shadow: var(--shadow-blue);
}

/* grid section */
.cases-section { padding-top: clamp(30px, 4vw, 50px); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}
@media (min-width: 1100px) {
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
}

.case-tile {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.case-tile:hover {
  border-color: var(--blue-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.case-tile.hidden { display: none; }

.case-tile-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-alt);
}
.case-tile-img.dark    { background: #0a1428; }
.case-tile-img.medical { background: #0f1729; }
.case-tile-img.llm     { background: #1a0f2e; }
.case-tile-img img,
.case-tile-img svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.case-tile-img svg { object-fit: contain; padding: 12px; }

.case-tile-tag {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.92);
  color: var(--text);
  backdrop-filter: blur(4px);
}
.case-tile-tag.tag-industrial { background: var(--blue);    color: #fff; }
.case-tile-tag.tag-medical    { background: #06b6d4;        color: #fff; }
.case-tile-tag.tag-llm        { background: #8b5cf6;        color: #fff; }
.case-tile-tag.tag-research   { background: var(--bg);      color: var(--text-mid); border: 1px solid var(--bd); }

.case-tile-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.case-tile-body h3 {
  font-size: 18px;
  letter-spacing: -0.4px;
  margin: 0;
}
.case-tile-client {
  font-size: 12px;
  color: var(--text-mute);
  margin: 0;
  letter-spacing: 0.1px;
}
.case-tile-body > p:not(.case-tile-client) {
  font-size: 13.5px;
  color: var(--text-body);
  line-height: 1.6;
  margin: 4px 0 0;
}
.case-tile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--bd);
}
.case-tile-stats span {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.case-tile-stats b {
  font-size: 17px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: -0.3px;
  font-family: var(--font-mono);
}
.case-tile-stats i {
  font-style: normal;
  font-size: 11px;
  color: var(--text-mute);
}
.case-tile-stack {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.case-tile-stack span {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-border);
  color: var(--blue-deep);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1px;
}

.cases-empty {
  text-align: center;
  color: var(--text-mute);
  font-size: 14px;
  margin: 60px 0;
}