/* Case-study library page. Additive — does not touch site.css. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.uc-head {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--border);
}
.uc-head h1 {
  font-size: clamp(36px, 4.6vw, 54px);
  font-weight: 600;
  letter-spacing: -0.05em;
  margin: 20px 0 20px;
  max-width: 16ch;
}
.uc-lede {
  max-width: 620px;
  font-size: 15px;
  line-height: 1.8;
}

.uc-controls {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.uc-search input {
  width: 100%;
  max-width: 760px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 13px 16px;
}
.uc-search input::placeholder {
  color: var(--text-muted);
}
.uc-search input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-color: var(--accent);
}

.uc-list {
  padding: 56px 0 80px;
  border-bottom: none;
}
.uc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}
.uc-card {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  border-radius: 7px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, transform 0.2s ease, box-shadow 0.2s ease;
}
.uc-card:hover {
  border-color: var(--accent);
}
@media (hover: hover) {
  .uc-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
  }
}
.uc-card[hidden] {
  display: none;
}
.uc-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  font:
    11px/1.6 ui-monospace,
    monospace;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.uc-meta span + span {
  color: var(--text-muted);
}
.uc-meta span + span::before {
  content: "/ ";
}
.uc-card h3 {
  font-size: 19px;
  font-weight: 550;
  line-height: 1.35;
  letter-spacing: -0.02em;
}
.uc-card h3 a {
  text-decoration: none;
}
.uc-card h3 a:hover {
  color: var(--accent);
}
.uc-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}
.uc-card {
  position: relative;
}
.uc-card p {
  font-size: 13px;
  color: var(--text-body);
}
.uc-stack {
  margin-top: auto;
  padding-top: 8px;
  font:
    10px/1.7 ui-monospace,
    monospace;
  color: var(--text-muted);
}
.uc-empty {
  font-size: 14px;
  color: var(--text-muted);
  padding: 40px 0;
}
.uc-empty a {
  color: var(--accent);
}

@media (max-width: 640px) {
  .uc-head {
    padding: 40px 0 28px;
  }
  .uc-head h1 {
    font-size: 34px;
  }
  .uc-grid {
    grid-template-columns: 1fr;
  }
  .uc-card {
    padding: 22px;
  }
  .uc-list {
    padding: 36px 0 56px;
  }
}

/* Grouped filters: industry (project) and capability (layer) */
.filter-groups {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}
.filter-groups .filters {
  align-items: center;
  margin-bottom: 0;
}
.filter-label {
  flex: 0 0 92px;
  font: 600 10.5px/1.6 ui-monospace, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
@media (max-width: 640px) {
  .filter-label {
    flex-basis: 100%;
  }
}
.filter-count {
  margin-left: 4px;
  font-size: 10.5px;
  color: var(--text-muted);
}
.uc-head .filter-status {
  margin-top: 14px;
}

/* Arriving from the homepage toolbox (?tool=…): which tool, and a way back. */
.uc-tool-filter {
  margin: 18px 0 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: var(--bg-raised);
  font-size: 13px;
}
.uc-tool-filter a {
  margin-left: 6px;
  color: var(--accent);
}