* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Open Sans', sans-serif;
  background: #ffffff;
  color: #1a2634;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: 60px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px;
}
.thank-you {
  text-align: center;
  background: #f8f9fa;
  border-radius: 8px;
  padding: 20px;
}
.thank-you h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: #005bb5;
}
.thank-you p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: #005bb5;
}
.btn {
  display: inline-block;
  background: #005bb5;
  color: #ffffff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 25px;
  font-weight: bold;
  transition: background 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 91, 181, 0.2);
}
.btn:hover {
  background: #003f87;
}
.cert-list {
  list-style: none;
  padding: 0;
}
.cert-list li {
  margin-bottom: 20px;
}
.certificate-item {
  border: 1px solid #ccc;
  padding: 20px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.certificate-header {
  background: linear-gradient(135deg, #4a90e2, #2d5ca6);
  color: #fff;
  padding: 20px;
  border-radius: 5px 5px 0 0;
}
.certificate-header h3 {
  font-size: 2.5rem;
  margin: 0;
  text-transform: uppercase;
}
.certificate-header p {
  margin: 5px 0 0;
  font-size: 1rem;
}
.certificate-body {
  padding: 20px;
}
.certificate-body h4 {
  font-size: 1.5rem;
  margin: 10px 0;
}
.certificate-body p {
  margin: 5px 0;
  font-size: 1rem;
}
.certificate-footer {
  background: linear-gradient(135deg, #4a90e2, #2d5ca6);
  color: #fff;
  padding: 10px;
  border-radius: 0 0 5px 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.certificate-footer p {
  margin: 0;
  font-size: 0.9rem;
}
.wiley-logo {
  font-size: 1.2rem;
  font-weight: bold;
}
footer {
  background: #1a2a44;
  color: #ffffff;
  text-align: center;
  padding: 20px 0;
  margin-top: 40px;
}
footer p {
  margin: 0 0 10px;
}
.social-icons {
  display: flex;
  justify-content: center;
  gap: 15px;
}
.social-icon {
  width: 24px;
  height: 24px;
  vertical-align: middle;
}
.social-icons a {
  text-decoration: none;
}
@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  .thank-you {
    padding: 15px;
  }
  .btn {
    padding: 8px 15px;
    font-size: 0.9rem;
  }
  .certificate-item {
    max-width: 100%;
    padding: 15px;
  }
  .certificate-header h3 {
    font-size: 2rem;
  }
  .certificate-body h4 {
    font-size: 1.2rem;
  }
  .social-icon {
    width: 20px;
    height: 20px;
  }
}
@media (max-width: 480px) {
  .thank-you h2 {
    font-size: 2rem;
  }
  .thank-you p {
    font-size: 1rem;
  }
  .btn {
    width: 100%;
    padding: 10px;
  }
  .certificate-header h3 {
    font-size: 1.5rem;
  }
  .certificate-body p {
    font-size: 0.9rem;
  }
  .social-icons {
    gap: 10px;
  }
}