/* Background collapsible cards (test.vkotopoulos.com) */
.bg-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.25rem 0 0;
}

.bg-card {
  padding: 0;
  overflow: hidden;
}

.bg-card details {
  margin: 0;
}

.bg-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
}

.bg-card summary::-webkit-details-marker {
  display: none;
}

.bg-summary-main {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.bg-period {
  font-family: var(--font-mono, "IBM Plex Mono", ui-monospace, monospace);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--muted, #9aa8a3);
}

.bg-title {
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.35;
}

.bg-org {
  font-size: 0.92rem;
}

.bg-chevron {
  flex: 0 0 auto;
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.7;
  transition: transform 0.15s ease;
}

.bg-card details[open] .bg-chevron {
  transform: rotate(225deg);
  margin-top: 0.65rem;
}

.bg-body {
  padding: 0 1.1rem 1.05rem;
}

.bg-body ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

.bg-body li {
  line-height: 1.45;
}

@media (max-width: 640px) {
  .bg-card summary {
    padding: 0.9rem 0.95rem;
  }
  .bg-body {
    padding: 0 0.95rem 0.95rem;
  }
  .bg-title {
    font-size: 0.98rem;
  }
}


/* Case studies collapsible cards */
.cs-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.cs-card {
  padding: 0;
  overflow: hidden;
}

.cs-card details {
  margin: 0;
}

.cs-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
}

.cs-card summary::-webkit-details-marker {
  display: none;
}

.cs-summary-main {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}

.cs-title {
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.35;
}

.cs-verdict {
  font-weight: 600;
}

.cs-pass { color: #2e8b57; }
.cs-research { color: #c48a1a; }
.cs-cav { color: #b8860b; }
.cs-fail { color: #b5523b; }

.cs-caveat { margin: 0; line-height: 1.45; font-size: 0.95rem; }

.cs-metrics {
  font-family: var(--font-mono, "IBM Plex Mono", ui-monospace, monospace);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.cs-card details[open] .bg-chevron {
  transform: rotate(225deg);
  margin-top: 0.65rem;
}

.cs-body {
  padding: 0 1.1rem 1.1rem;
  display: grid;
  gap: 0.85rem;
}

.cs-body p {
  margin: 0;
  line-height: 1.5;
}

.cs-body .btn {
  justify-self: start;
}

@media (max-width: 640px) {
  .cs-card summary {
    padding: 0.9rem 0.95rem;
  }
  .cs-body {
    padding: 0 0.95rem 0.95rem;
  }
  .cs-title {
    font-size: 0.98rem;
  }
}