/* ============================================
   Case Studies Page Styles
   ============================================ */

/* ====== STUDY CARDS ====== */
.cs-study {
  padding: 64px 0;
  border-top: 1px solid var(--gray-200);
}

.cs-study:first-child {
  border-top: none;
  padding-top: 0;
}

.cs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.cs-grid.reverse .cs-content { order: 1; }
.cs-grid.reverse .cs-image { order: 2; }

/* ====== IMAGE ====== */
.cs-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--gray-100);
  min-width: 0;
  transition: box-shadow 0.3s ease;
}

.cs-image:hover {
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.08);
}

.cs-image-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cs-image-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #e8f1fb, #f0f0f0);
}

.cs-image-label {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 7px 16px;
  border-radius: 8px;
  background: var(--white);
  color: var(--gray-700);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  max-width: calc(100% - 32px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ====== CONTENT ====== */
.cs-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Meta — building type */
.cs-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.cs-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  background: var(--gray-100);
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cs-tag svg {
  width: 16px;
  height: 16px;
}

/* Title */
.cs-title {
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.3;
  margin-bottom: 16px;
}

/* Description */
.cs-desc {
  font-size: 16px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 28px;
}

/* ====== STATS — METRIC CARDS ====== */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
  min-width: 0;
}

.cs-stat-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: 14px;
  padding: 20px 16px;
  text-align: center;
  min-width: 0;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.cs-stat-card:hover {
  border-color: var(--blue-light);
  background: var(--blue-light);
}

.cs-stat-value {
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.5px;
  margin-bottom: 4px;
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
  white-space: normal;
}

.cs-stat-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
  white-space: normal;
}

/* ====== ACTION BUTTONS ====== */
.cs-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.cs-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  min-height: 44px;
  border-radius: 100px;
  background: var(--gray-900);
  color: var(--white);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.cs-btn-primary:hover {
  background: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(21, 101, 192, 0.25);
}

.cs-btn-primary svg {
  width: 18px;
  height: 18px;
}

.cs-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  min-height: 44px;
  border-radius: 100px;
  background: transparent;
  color: var(--gray-600);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.cs-btn-ghost:hover {
  background: var(--gray-100);
}

.cs-btn-ghost svg {
  width: 20px;
  height: 20px;
  color: var(--blue);
}

/* ====== HOVER: TOUCH DEVICES ====== */
@media (hover: none) {
  .cs-image:hover { box-shadow: none; }

  .cs-stat-card:hover {
    background: var(--gray-50);
    border-color: var(--gray-100);
  }

  .cs-btn-primary:hover {
    transform: none;
    box-shadow: none;
    background: var(--gray-900);
  }
}

/* ====== FOCUS STATES ====== */
.cs-btn-primary:focus-visible,
.cs-btn-ghost:focus-visible {
  outline: 3px solid rgba(21, 101, 192, 0.35);
  outline-offset: 3px;
  border-radius: 100px;
}

/* ====== EMPTY / ERROR STATES ====== */
.cs-empty,
.cs-error {
  text-align: center;
  padding: 80px 20px;
  font-size: 16px;
  color: var(--gray-400);
  font-weight: 500;
}

.cs-error {
  color: #C62828;
  background: #FFEBEE;
  border-radius: var(--radius);
  padding: 40px 20px;
}

/* ====== RESPONSIVE ====== */

/* Tablet landscape */
@media (max-width: 1280px) {
  .cs-grid { gap: 48px; }
}

/* Tablet */
@media (max-width: 1024px) {
  .cs-grid { gap: 40px; }
  .cs-study { padding: 48px 0; }
  .cs-title { font-size: 24px; }
}

/* Large phone / small tablet */
@media (max-width: 860px) {
  .cs-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* On mobile, image always first, content second */
  .cs-grid.reverse .cs-content { order: 2; }
  .cs-grid.reverse .cs-image { order: 1; }

  .cs-image {
    aspect-ratio: 16 / 10;
  }

  .cs-study {
    padding: 40px 0;
  }
}

/* Phone */
@media (max-width: 640px) {
  .cs-study { padding: 32px 0; }

  .cs-image {
    border-radius: 14px;
    aspect-ratio: 16 / 10;
  }

  .cs-title { font-size: 22px; }
  .cs-desc { font-size: 15px; margin-bottom: 24px; }

  .cs-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .cs-stat-card { padding: 16px 12px; border-radius: 12px; }
  .cs-stat-value { font-size: 20px; }
  .cs-stat-label { font-size: 10px; letter-spacing: 1px; }

  .cs-image-label {
    top: 12px;
    left: 12px;
    max-width: calc(100% - 24px);
    font-size: 10px;
    padding: 6px 12px;
    border-radius: 7px;
  }

  .cs-actions { flex-direction: column; align-items: flex-start; }
  .cs-btn-primary, .cs-btn-ghost { width: 100%; justify-content: center; }
}

/* Small phone */
@media (max-width: 380px) {
  .cs-stats { grid-template-columns: 1fr; gap: 8px; }
  .cs-stat-card { padding: 14px 10px; }
  .cs-stat-value { font-size: 18px; }
  .cs-stat-label { font-size: 10px; letter-spacing: 0.8px; }
  .cs-tag { font-size: 11px; padding: 6px 12px; }
}