/* =============================================
   Case Studies Archive – Übersichtsseite
   Prefix: .re-csa-
   ============================================= */

/* ── Variables ── */
.re-cs-archive {
  --re-teal:     #4AF7B0;
  --re-dark:     #203749;
  --re-white:    #ffffff;
  --re-light-bg: #f0f0f0;
  --re-border:   #cccccc;
  --re-muted:    #4f5963;
}

/* ── HERO ── */
.re-csa-hero {
  background: var(--re-white);
  color: var(--re-dark);
  padding: 36px 16px 28px;
  position: relative;
  overflow: hidden;
}

.re-csa-hero::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 42%;
  background: linear-gradient(150deg, transparent 38%, rgba(74,247,176,0.07) 38%);
  pointer-events: none;
}

.re-csa-hero-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: end;
  position: relative;
  z-index: 1;
}

/* ── Breadcrumb ── */
.re-csa-breadcrumb {
  font-family: "Mark-Bold", sans-serif;
  font-size: clamp(10px, 2.2vw, 12px);
  color: var(--re-muted);
  margin-bottom: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.re-csa-breadcrumb a {
  color: var(--re-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.re-csa-breadcrumb a:hover {
  color: var(--re-teal);
}

.re-csa-breadcrumb em {
  font-style: normal;
  color: var(--re-teal);
}

.re-csa-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Mark-Bold", sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--re-teal);
  margin-bottom: 18px;
}

.re-csa-badge-line {
  display: inline-block;
  width: 22px;
  height: 2px;
  background: var(--re-teal);
}

.re-csa-hero h1 {
  font-family: "Mark-Heavy", sans-serif;
  font-size: clamp(30px, 7vw, 60px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--re-dark);
  margin-bottom: 14px;
}

.re-csa-hero h1 em {
  font-style: normal;
  color: var(--re-teal);
}

.re-csa-hero-sub {
  font-family: "Mark-Regular", sans-serif;
  font-size: clamp(14px, 3.4vw, 18px);
  color: var(--re-muted);
  line-height: 1.55;
  max-width: 490px;
  margin-bottom: 20px;
}

.re-csa-hero-btns {
  display: flex;
  gap: 0;
  align-items: center;
  margin-bottom: 14px;
}

/* ── Shadow-Box Button ── */
.re-csa-btn-teal,
.re-csa-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Mark-Bold", sans-serif;
  font-size: clamp(11px, 2.5vw, 12px);
  line-height: 1.5;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--re-dark);
  background: var(--re-white);
  border: 2px solid var(--re-teal);
  padding: 10px 28px 11px 16px;
  text-decoration: none;
  box-shadow: 4px 4px 0 0 var(--re-white), 4px 4px 0 2px var(--re-teal);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border-radius: 0;
}

.re-csa-btn-teal:hover,
.re-csa-cta-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 var(--re-white), 6px 6px 0 2px var(--re-teal);
  text-decoration: none;
  color: var(--re-dark);
}

.re-csa-hero-note {
  font-size: 11.5px;
  color: rgba(32,55,73,0.3);
  font-style: italic;
}

/* ── Stat Cards ── */
.re-csa-stats-intro {
  font-size: 12px;
  color: rgba(32,55,73,0.5);
  font-family: "Mark-Bold", sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.re-csa-hero-stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.re-csa-stat-card {
  background: var(--re-dark);
  border: 1px solid var(--re-border);
  border-left: 4px solid var(--re-teal);
  border-radius: 0;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.re-csa-stat-num {
  font-family: "Mark-Heavy", sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--re-white);
  white-space: nowrap;
  line-height: 1;
}

.re-csa-stat-num em {
  font-style: normal;
  color: var(--re-teal);
}

.re-csa-stat-info strong {
  display: block;
  font-family: "Mark-Bold", sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--re-white);
  margin-bottom: 2px;
}

.re-csa-stat-info span {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ── USP STRIP ── */
.re-csa-usp-strip {
  background: var(--re-light-bg);
  border: none;
  padding: 28px 16px;
}

.re-csa-usp-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 10px;
}

.re-csa-usp-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: "Mark-Medium", sans-serif;
  font-size: 13px;
  color: var(--re-dark);
  font-weight: 700;
  flex: 1 1 240px;
  padding: 0;
}

.re-csa-usp-dot {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background-color: var(--re-teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.re-csa-usp-dot svg {
  width: 13px;
  height: 13px;
  display: block;
}

/* ── FILTER ── */
.re-csa-grid-section {
  background: var(--re-white);
}

.re-csa-filter-wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 52px 16px 0;
}

.re-csa-filter-heading {
  font-family: "Mark-Bold", sans-serif;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--re-muted);
  margin-bottom: 12px;
}

.re-csa-filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--re-border);
}

.re-csa-f-btn {
  padding: 8px 18px;
  border-radius: 0;
  border: 2px solid var(--re-border);
  background: #fff;
  color: #203749;
  font-family: "Mark-Bold", sans-serif;
  font-size: clamp(11px, 2.5vw, 12px);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: none;
  outline: none;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.re-csa-f-btn:hover {
  border-color: #4AF7B0;
  color: #203749;
  box-shadow: none;
  transform: none;
}

.re-csa-f-btn.active,
.re-csa-f-btn.active:focus {
  background: #203749;
  color: var(--re-white);
  border-color: #203749;
  box-shadow: none;
  outline: none;
}

.re-csa-f-btn.active:hover {
  background: #1a2938;
  border-color: #1a2938;
  outline: none;
  transform: none;
}

.re-csa-f-count {
  margin-left: auto;
  font-size: 13px;
  color: var(--re-muted);
  font-weight: 400;
}

/* ── GRID ── */
.re-csa-grid-wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 36px 16px 100px;
}

.re-csa-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* ── CARD ── */
.re-csa-card {
  background: var(--re-white);
  border: 1px solid var(--re-border);
  border-radius: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
  cursor: pointer;
}

.re-csa-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(32,55,73,0.1);
  border-color: var(--re-teal);
}

/* Featured */
.re-csa-card.featured {
  grid-column: span 1;
  flex-direction: column;
}

.re-csa-card.featured .re-csa-card-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.re-csa-card-accent {
  width: 100%;
  min-height: 120px;
  flex-shrink: 0;
  background: var(--re-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.re-csa-accent-kpi {
  text-align: center;
  position: relative;
  z-index: 1;
}

.re-csa-accent-kpi-val {
  font-family: "Mark-Heavy", sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--re-teal);
  line-height: 1;
}

.re-csa-accent-kpi-lbl {
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  margin-top: 6px;
  font-family: "Mark-Bold", sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Card parts */
.re-csa-card-header {
  padding: 24px 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.re-csa-logo-box {
  height: 52px;
  background: transparent;
  border: none;
  border-radius: 0;
  display: flex;
  align-items: center;
  padding: 0;
  font-size: 10px;
  font-family: "Mark-Bold", sans-serif;
  letter-spacing: 0.07em;
  color: var(--re-muted);
  text-transform: uppercase;
}

.re-csa-logo-box img {
  max-height: 36px;
  max-width: 110px;
  object-fit: contain;
}

.re-csa-tag {
  font-size: 10px;
  font-family: "Mark-Bold", sans-serif;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 0;
  background: var(--re-teal);
  color: var(--re-dark);
}

.re-csa-card-body {
  padding: 16px 24px 0;
  flex: 1;
}

.re-csa-card-title {
  font-family: "Mark-Heavy", sans-serif;
  font-size: 22px;
  line-height: 1.3;
  color: var(--re-dark);
  margin-bottom: 10px;
}

.re-csa-card-desc {
  font-family: "Mark-Regular", sans-serif;
  font-size: 15px;
  color: var(--re-muted);
  line-height: 1.55;
}

/* KPI strip */
.re-csa-kpi-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 20px 0 0;
  padding: 14px 24px;
  border-top: 1px solid var(--re-border);
  background: var(--re-light-bg);
}

.re-csa-card.featured .re-csa-kpi-strip {
  grid-template-columns: repeat(3, 1fr);
}

.re-csa-kpi {
  text-align: center;
}

.re-csa-kpi-val {
  font-family: "Mark-Heavy", sans-serif;
  font-size: 18px;
  color: #6a7278;
  line-height: 1;
}

.re-csa-kpi-label {
  font-family: "Mark-Bold", sans-serif;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a8f95;
  margin-top: 3px;
}

/* Card footer */
.re-csa-card-foot {
  padding: 14px 24px;
  border-top: 1px solid var(--re-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.re-csa-card-industry {
  font-family: "Mark-Bold", sans-serif;
  font-size: 11px;
  color: var(--re-muted);
  font-weight: 700;
}

.re-csa-card-link {
  font-family: "Mark-Bold", sans-serif;
  font-size: 11px;
  font-weight: 800;
  color: var(--re-dark);
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.15s;
}

.re-csa-card:hover .re-csa-card-link {
  color: var(--re-teal);
}

.re-csa-arrow-circle {
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--re-teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--re-dark);
  transition: all 0.15s;
}

.re-csa-card:hover .re-csa-arrow-circle {
  background: var(--re-teal);
  border-color: var(--re-teal);
}

/* ── CTA ── */
.re-csa-cta {
  background: var(--re-dark) url("../../uploads/2020/10/mountainsminified.jpg") center/cover no-repeat;
  padding: 60px 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.re-csa-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(32,55,73,0.72);
  pointer-events: none;
  z-index: 0;
}

.re-csa-cta-inner {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.re-csa-cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Mark-Bold", sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--re-teal);
  margin-bottom: 16px;
}

.re-csa-cta-badge span {
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--re-teal);
}

.re-csa-cta h2 {
  font-family: "Mark-Heavy", sans-serif;
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 700;
  color: var(--re-white);
  line-height: 1.15;
  letter-spacing: -0.4px;
  margin-bottom: 12px;
}

.re-csa-cta h2 em {
  font-style: normal;
  color: var(--re-teal);
}

.re-csa-cta p {
  font-family: "Mark-Regular", sans-serif;
  font-size: 15px;
  color: rgba(255,255,255,0.68);
  line-height: 1.7;
  margin-bottom: 30px;
}

.re-csa-cta .re-csa-cta-btn {
  --re-white: #203749;
  box-shadow: 4px 4px 0 0 #203749, 4px 4px 0 2px var(--re-teal);
  color: #203749;
  background: #ffffff;
}

.re-csa-cta .re-csa-cta-btn:hover {
  box-shadow: 6px 6px 0 0 #203749, 6px 6px 0 2px var(--re-teal);
  color: #203749;
}

/* ── Responsive ── */
@media (min-width: 768px) {
  .re-csa-hero {
    padding: 70px 30px 60px;
  }

  .re-csa-hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 26px;
  }

  .re-csa-usp-strip {
    padding: 32px 30px;
  }

  .re-csa-filter-wrap {
    padding: 40px 30px 0;
  }

  .re-csa-grid-wrap {
    padding: 36px 30px 100px;
  }

  .re-csa-cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .re-csa-card.featured {
    grid-column: span 2;
    flex-direction: row;
  }

  .re-csa-card-accent {
    width: 220px;
    min-height: auto;
  }

  .re-csa-cta {
    padding: 72px 30px;
  }
}

@media (min-width: 1200px) {
  .re-csa-hero {
    padding: 90px 15px 80px;
  }

  .re-csa-usp-strip {
    padding: 36px 15px;
  }

  .re-csa-filter-wrap {
    padding: 52px 15px 0;
  }

  .re-csa-grid-wrap {
    padding: 36px 15px 100px;
  }

  .re-csa-cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .re-csa-card.featured {
    grid-column: span 2;
  }

  .re-csa-cta {
    padding: 88px 15px;
  }
}