:root {
  --cs-bg: #f7f9ff;
  --cs-surface: #f0f4ff;
  --cs-card: #ffffff;
  --cs-soft: rgba(21, 94, 254, 0.1);
  --cs-border: #e6edff;
  --cs-text: #0f1a20;
  --cs-muted: #4a5a6a;
  --cs-accent: #155efe;
  --cs-accent-strong: #155efe;
  --cs-shadow: 0 14px 38px rgba(12, 20, 30, 0.08);
  --cs-radius: 20px;
}

body.case-studies-page,
body.case-study-details-page {
  background: var(--cs-bg);
  color: var(--cs-text);
}

.cs-main {
  min-height: 100vh;
  padding: 60px 0 80px;
}

.cs-container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.cs-hero {
  display: grid;
  gap: 24px;
  align-items: center;
  margin-bottom: 32px;
  padding: 80px 60px;
  background: linear-gradient(130deg, #0f1a20 15%, #155efe 60%, #0b1320 100%);
  border-radius: 28px;
  position: relative;
  overflow: hidden;
}

.cs-hero::before {
  content: "";
  position: absolute;
  inset: auto -10% -35% auto;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  filter: blur(6px);
}

.cs-hero > * {
  position: relative;
  z-index: 1;
}

.cs-hero .eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 12px;
  color: #ffffff;
}

.cs-hero h1 {
  font-family: "Barlow Condensed", "Barlow", "Poppins", sans-serif;
  font-size: clamp(2.2rem, 3vw, 3.4rem);
  color: #ffffff;
  margin: 0;
}

.cs-hero p {
  max-width: 640px;
  color: #eef3ff;
  margin: 0;
  line-height: 1.6;
}

.cs-toolbar {
  display: grid;
  gap: 18px;
  margin: 28px 0 36px;
}

.cs-search {
  position: relative;
}

.cs-search input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  border-radius: 999px;
  border: 1px solid var(--cs-border);
  background: #ffffff;
  color: var(--cs-text);
  font-size: 15px;
}

.cs-search input::placeholder {
  color: rgba(15, 26, 32, 0.45);
}

.cs-search span {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: var(--cs-accent-strong);
}

.cs-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cs-filter-btn {
  border: 1px solid var(--cs-border);
  background: #ffffff;
  color: var(--cs-text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.4px;
  transition: all 0.2s ease;
}

.cs-filter-btn.active,
.cs-filter-btn:hover {
  background: var(--cs-accent);
  border-color: transparent;
  color: #ffffff;
}

.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.cs-card {
  background: var(--cs-card);
  border-radius: var(--cs-radius);
  border: 1px solid var(--cs-border);
  overflow: hidden;
  display: grid;
  min-height: 100%;
  box-shadow: var(--cs-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.cs-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 42px rgba(21, 94, 254, 0.2);
}

.cs-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.cs-card-body {
  padding: 22px;
  display: grid;
  gap: 16px;
}

.cs-card-title {
  font-family: "Barlow Condensed", "Barlow", "Poppins", sans-serif;
  font-size: 20px;
  margin: 0;
}

.cs-card-desc {
  color: var(--cs-muted);
  line-height: 1.5;
  margin: 0;
}

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cs-tag {
  background: rgba(21, 94, 254, 0.12);
  color: var(--cs-accent-strong);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
}

.cs-card-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.cs-btn {
  border: none;
  background: var(--cs-accent-strong);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.4px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cs-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(21, 94, 254, 0.25);
}

.cs-secondary-link {
  color: var(--cs-accent);
  font-size: 13px;
  text-decoration: underline;
}

.cs-empty {
  text-align: center;
  padding: 60px 20px;
  border-radius: var(--cs-radius);
  border: 1px dashed var(--cs-border);
  color: var(--cs-muted);
  background: #ffffff;
}

.cs-skeleton {
  position: relative;
  overflow: hidden;
  background: #eef3ff;
  min-height: 320px;
}

.cs-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transform: translateX(-100%);
  animation: cs-shimmer 1.2s infinite;
}

@keyframes cs-shimmer {
  100% {
    transform: translateX(100%);
  }
}

.cs-detail-hero {
  display: grid;
  gap: 24px;
  margin-bottom: 32px;
}

.cs-detail-hero h1 {
  font-family: "Barlow Condensed", "Barlow", "Poppins", sans-serif;
  color: var(--cs-text);
}

.cs-detail-hero img {
  width: 100%;
  border-radius: var(--cs-radius);
  height: clamp(260px, 35vw, 420px);
  object-fit: cover;
  border: 1px solid var(--cs-border);
  box-shadow: var(--cs-shadow);
}

.cs-detail-content {
  background: #ffffff;
  padding: 28px;
  border-radius: var(--cs-radius);
  border: 1px solid var(--cs-border);
  display: grid;
  gap: 24px;
}

.cs-detail-block h3 {
  font-family: "Barlow Condensed", "Barlow", "Poppins", sans-serif;
  margin-bottom: 8px;
}

.cs-detail-block p {
  color: var(--cs-muted);
  line-height: 1.6;
  margin: 0;
}

.cs-process {
  list-style: decimal;
  padding-left: 18px;
  margin: 0;
  color: var(--cs-muted);
  display: grid;
  gap: 8px;
}

.cs-results {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 14px;
  background: rgba(21, 94, 254, 0.08);
  border: 1px solid rgba(21, 94, 254, 0.2);
}

.cs-testimonial {
  border-left: 3px solid var(--cs-accent-strong);
  padding-left: 16px;
  color: var(--cs-muted);
}

.cs-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cs-accent);
  font-size: 14px;
  margin-bottom: 16px;
}

@media (max-width: 1024px) {
  .cs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .cs-main {
    padding: 100px 0 60px;
  }

  .cs-hero {
    padding: 60px 28px;
  }

  .cs-grid {
    grid-template-columns: 1fr;
  }

  .cs-card img {
    height: 190px;
  }
}