.portfolio-section {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1rem;
}

.intro {
  text-align: center;
  margin-bottom: 2.5rem;
}

.intro h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.intro p {
  font-size: 1.05rem;
  color: #555;
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  border-bottom: 2px solid #e1e4e8;
  padding-bottom: 0.4rem;
  margin-bottom: 1.25rem;
  margin-top: 2.5rem;
}

.project-card {
  border: 1px solid #e1e4e8;
  border-radius: 8px;
  padding: 1.1rem 1.3rem;
  margin-bottom: 1rem;
  transition: box-shadow 0.2s;
}

.project-card:hover {
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

.project-card h4 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.project-card h4 a {
  color: #0366d6;
  text-decoration: none;
}

.project-card h4 a:hover {
  text-decoration: underline;
}

.project-card ul {
  margin: 0;
  padding-left: 1.3rem;
  color: #444;
  font-size: 0.95rem;
  line-height: 1.65;
}

.project-card p {
  margin: 0;
  color: #444;
  font-size: 0.95rem;
  line-height: 1.65;
}

.links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid #0366d6;
  border-radius: 6px;
  color: #0366d6;
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.link-btn:hover {
  background: #0366d6;
  color: #fff;
}

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

.contact-list li {
  margin-bottom: 0.5rem;
  font-size: 0.97rem;
}

.contact-list a {
  color: #0366d6;
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}