body {
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 0;
}

header {
  background-color: #2c3e50;
  color: #ecf0f1;
  text-align: center;
  padding: 2rem 0;
}
nav {
  background-color: #34495e;
  padding: 1rem;
}
nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap; /* For responsive adjustments */
}
nav ul li {
  margin: 0 1rem;
}
nav ul li a {
  color: #ecf0f1;
  text-decoration: none;
}
a {
  text-decoration: none;
  color: #2c3e50;
}
section {
  padding: 2rem;
  margin: 2rem 0;
  background-color: #f9f9f9;
  border-radius: 8px;
}
h1,
h2 {
  color: #2c3e50;
}
.project,
.paper,
.patent {
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill {
  background-color: #3498db;
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
}
form {
  display: grid;
  gap: 1rem;
}
input,
textarea {
  width: 100%;
  padding: 0.5rem;
}
button {
  background-color: #2c3e50;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
}
footer {
  background-color: #2c3e50;
  color: #ecf0f1;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  section {
    padding: 1rem;
    margin: 1rem 0;
  }
  .skills {
    justify-content: center;
  }
  nav ul {
    flex-direction: column;
    align-items: center;
  }
  .nav-links {
    display: none;
    flex-direction: row;
    position: absolute;
    top: 50px;
    background-color: #2c3e50;
    width: 100%;
    left: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .menu-icon {
    display: flex;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }
  .skill {
    padding: 0.3rem 0.7rem;
  }
}

.profile-image img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 20px auto;
  display: block;
}

nav {
  position: relative;
}

.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.menu-icon {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.menu-icon .bar {
  width: 25px;
  height: 3px;
  background-color: #333;
  border-radius: 5px;
}