/* =============================================================================
   case-studies.css — Case studies grid + card
   ============================================================================= */

.case-studies {
  border-bottom: 1px solid var(--border);
}

.case-studies__inner {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

/* ---------------------------------------------------------------------------
   Download button
   --------------------------------------------------------------------------- */
.cs-download {
  margin-top: 1.5rem;
}

/* ---------------------------------------------------------------------------
   Stats legend
   --------------------------------------------------------------------------- */
.cs-legend {
  display: table;
  border-collapse: collapse;
  margin-top: 1.25rem;
  font-size: 0.82rem;
}

.cs-legend__item {
  display: table-row;
}

.cs-legend__item dt,
.cs-legend__item dd {
  display: table-cell;
  padding: 0.3rem 0;
  vertical-align: middle;
}

.cs-legend__item dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  padding-right: 1.25rem;
  letter-spacing: 0.01em;
}

.cs-legend__item dd {
  color: var(--fg-muted);
}

.cs-legend__item + .cs-legend__item dt,
.cs-legend__item + .cs-legend__item dd {
  border-top: 1px solid var(--border);
}

/* ---------------------------------------------------------------------------
   Grid
   --------------------------------------------------------------------------- */
.cs-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 3rem;
  grid-template-columns: 1fr;
  /* Prevent any card content from blowing out the viewport on mobile */
  max-width: 100%;
  overflow: hidden;
  /* Give first-row cards space to translateY(-2px) on hover without clipping */
  padding-top: 4px;
}

/* Single column: cap width and centre the card */
@media (max-width: 639px) {
  .cs-grid {
    max-width: 28rem;
    margin-inline: auto;
  }
}

@media (min-width: 640px) {
  .cs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------------------------------------------------------------------------
   Card
   --------------------------------------------------------------------------- */
.cs-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-radius: var(--radius-2xl);
  border: 1px solid oklch(0.91 0.012 245 / 0.7);
  background-color: var(--card);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.cs-card:hover {
  transform: translateY(-2px);
  border-color: oklch(0.54 0.085 185 / 0.35);
  box-shadow: 0 4px 20px -6px rgba(15, 23, 42, 0.12);
}

.cs-card:focus-visible {
  box-shadow: 0 0 0 3px oklch(0.54 0.085 185 / 0.4);
}

/* ---------------------------------------------------------------------------
   Top row: title + badge
   --------------------------------------------------------------------------- */
.cs-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.cs-card__title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 450;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg);
}

/* Reduction pill badge (top-right) */
.cs-card__badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  background-color: oklch(0.54 0.085 185 / 0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-top: 0.2rem; /* optical alignment with title baseline */
}

/* ---------------------------------------------------------------------------
   Description
   --------------------------------------------------------------------------- */
.cs-card__desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-muted);
  margin-top: 0.1rem;
}

/* ---------------------------------------------------------------------------
   Stats sub-box
   --------------------------------------------------------------------------- */
.cs-card__stats-box {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 0.75rem;
  border-radius: var(--radius-lg);
  background-color: var(--surface);
  padding: 1rem 1.25rem;
  /* Prevent the box itself from overflowing the card */
  min-width: 0;
  overflow: hidden;
}

.cs-card__stat {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Divider between stat columns */
.cs-card__stat + .cs-card__stat {
  border-left: 1px solid var(--border);
  padding-left: 1.25rem;
}

/* Shrink numbers gracefully on very narrow cards */
.cs-card__stat-num {
  font-size: clamp(1rem, 4vw, 1.35rem);
}

.cs-card__stat-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  opacity: 0.85;
}

.cs-card__stat-value {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}

.cs-card__stat-num {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  line-height: 1;
}

.cs-card__stat-unit {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ---------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */
.cs-card__footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Prevent the buttons' own clicks from bubbling and firing the card open handler */
.cs-card__btn,
.cs-card__btn-proof {
  pointer-events: auto;
}

.cs-card__btn {
  pointer-events: none;
}