* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Poppins", sans-serif;
  color: #1f2937;
  background-color: #ffffff;
  line-height: 1.6;
}
header {
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  background-color: white;
}
header h1 {
  font-size: 1.5rem;
  color: #1f2937;
}
ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

ul a {
  text-decoration: none;
  color: #4b5563;
  font-weight: 500;
  transition: color 0.2s;
}
ul a:hover {
  color: #3b82f6;
}
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
}
section {
  margin-bottom: 4rem;
}
section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #1f2937;
  border-bottom: 3px solid #3b82f6;
  display: inline-block;
  padding-bottom: 0.5rem;
}
.about-content {
  background-color: #f9fafb;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}
.project-card {
  background-color: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.project-card h3 {
  color: #3b82f6;
  margin-bottom: 0.5rem;
}
.project-card p {
  margin: 0.5rem 0;
  color: #4b5563;
}
.project-card a {
  color: #3b82f6;
  text-decoration: none;
  font-weight: 500;
}
.project-card a:hover {
  text-decoration: underline;
}
.contact-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.contact-links a {
  color: #3b82f6;
  text-decoration: none;
  font-weight: 500;
}
footer {
  text-align: center;
  padding: 2rem;
  color: #9ca3af;
  border-top: 1px solid #e5e7eb;
}
@media (max-width: 768px) {
  header {
    flex-direction: column;
    height: auto;
    padding: 1rem;
  }
  ul {
    margin-top: 1rem;
  }
}