/* ---------- Case study article ---------- */
.case-study{
  padding-top: 110px;
}

.cs-hero{
  padding: 60px 6% 60px;
  max-width: 900px;
  margin: 0 auto;
}

.back-link{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--second-color);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 40px;
  transition: color .25s ease;
}

.back-link:hover{
  color: var(--main-color);
}

.back-link i{
  font-size: 18px;
}

.cs-hero h1{
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  letter-spacing: -1.5px;
  line-height: 1.05;
  margin-bottom: 18px;
}

.cs-subtitle{
  font-size: 1.2rem;
  color: var(--second-color);
  max-width: 640px;
  line-height: 1.5;
  margin-bottom: 44px;
}

.cs-meta{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 36px;
}

.cs-meta div span{
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--main-color);
  margin-bottom: 8px;
}

.cs-meta div p{
  font-size: 0.92rem;
  color: var(--text-color);
  line-height: 1.4;
}

.cs-cta{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.cs-embed{
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: 40px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--surface-color);
}

.cs-embed iframe{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.cs-disclaimer{
  max-width: 900px;
  margin: 0 auto 20px;
  padding: 0 6%;
}

.cs-disclaimer p{
  background: var(--second-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--second-color);
}

.cs-disclaimer strong{
  color: var(--text-color);
}

.cs-body{
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 6% 40px;
}

.cs-body a{
  color: var(--main-color);
  text-decoration: underline;
  font-weight: 500;
  text-underline-offset: 2px;
}

.cs-body a:hover{
  color: var(--main-color-light);
}

.cs-stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 32px 0;
}

.cs-stats .stat-num{
  font-family: var(--heading-font);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--main-color);
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 8px;
}

.cs-stats .stat-label{
  font-size: 0.9rem;
  color: var(--second-color);
  line-height: 1.5;
}

@media (max-width: 660px){
  .cs-stats{
    grid-template-columns: 1fr;
  }
}

.cs-body section{
  padding: 44px 0;
  border-bottom: 1px solid var(--border-color);
}

.cs-body section:last-child{
  border-bottom: none;
}

.cs-body h2{
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.8px;
  margin-bottom: 20px;
}

.cs-body h3{
  font-size: 1.15rem;
  letter-spacing: -0.3px;
  margin: 28px 0 10px;
}

.cs-body h3:first-child{
  margin-top: 0;
}

.cs-body p{
  color: var(--second-color);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.cs-body p:last-child{
  margin-bottom: 0;
}

.cs-body strong{
  color: var(--text-color);
  font-weight: 600;
}

.cs-list{
  list-style: none;
  padding: 0;
  margin: 0;
}

.cs-list li{
  position: relative;
  padding-left: 22px;
  color: var(--second-color);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.cs-list li:last-child{
  margin-bottom: 0;
}

.cs-list li::before{
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--main-color);
}

.cs-list li strong{
  color: var(--text-color);
  font-weight: 600;
}

.cs-cta-bottom{
  max-width: 760px;
  margin: 0 auto;
  padding: 0 6% 100px;
}

@media (max-width: 990px){
  .cs-meta{
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px){
  .cs-meta{
    grid-template-columns: 1fr;
  }

  .case-study{
    padding-top: 90px;
  }

  .cs-hero{
    padding: 40px 6%;
  }
}