.case-study {
  max-width: 800px;
  margin: 40px auto;
  padding: 25px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 4px 8px 25px rgba(0,0,0,0.08);
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  border: 5px solid #000000; /* added border color and thickness */
}


.case-hero {
  text-align: center;
  border-bottom: 2px solid #eee;
  margin-bottom: 20px;
  padding-bottom: 10px;
}

.case-hero h2 {
  font-size: 28px;
  font-weight: 700;
  color: #333;
}

.case-hero .highlight {
  font-size: 18px;
  font-weight: 600;
  color: #009688;
  margin-top: 8px;
}

.case-client,
.case-strategy,
.case-results {
  margin-bottom: 25px;
}

.case-client h3,
.case-strategy h3,
.case-results h3 {
  font-size: 22px;
  margin-bottom: 10px;
  color: #444;
  border-left: 4px solid #009688;
  padding-left: 8px;
}

.case-strategy ul,
.case-results ul {
  margin-left: 20px;
}

.case-proof {
  margin-top: 15px;
  text-align: center;
}

.case-proof img {
  width: 100%;
  max-width: 500px;
  border-radius: 8px;
  border: 1px solid #ddd;
}

.case-cta {
  text-align: center;
  margin-top: 30px;
  padding: 20px;
  background: #f9f9f9;
  border-radius: 10px;
}

.case-cta p {
  font-size: 18px;
  font-weight: 600;
  color: #222;
  margin-bottom: 15px;
}

.cta-btn {
  display: inline-block;
  background: #009688;
  color: #fff;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 16px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.cta-btn:hover {
  background: #00796b;
}