* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
  padding: 0;
  margin: 0;
}

header {
  text-align: center;
  padding: 3rem 1rem 2rem;
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
}

header h3 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

header h5 {
  font-size: 1.2rem;
  font-weight: 400;
  color: #666;
  margin-bottom: 1rem;
}

header p {
  max-width: 1200px;
  margin: 0 auto;
  color: #555;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.step {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  background: #fff;
  padding: 1.5rem;
  border-radius: 5px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  transition: all 0.3s ease;
}

.step:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.step img {
  width: 100%;
  max-width: 220px;
  border-radius: 3px;
  object-fit: cover;
}

.desc {
  flex: 1;
}

.desc h2 {
  margin-bottom: 0.75rem;
  margin-top: 20px;
  font-size: 1.25rem;
  color: #222;
}

.desc p {
  margin-bottom: 0.5rem;
  color: #444;
}

.image-pair {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  max-width: 100%;
  align-items: center;
}

.image-pair img {
  max-width: 100%;
  max-height: 400px;
  object-fit: contain;
  border-radius: 3px;
  display: block;
}

.image-block img {
  width: 100%;
  object-fit: contain;
  border-radius: 3px;
}

.caption {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: #555;
  text-align: center;
}

.step .desc {
  color: #444;
  max-width: 100%;
  margin-top: -30px;
}

@media (max-width: 768px) {
  .image-pair {
    flex-direction: column;
    gap: 1rem;
  }

  .image-block {
    flex: 1 1 100%;
  }

  .image-block img {
    max-height: 300px;
  }
}