body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #f4f4f4;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  text-decoration: none;
}

h2 {
  text-align: center;
}

main {
  flex: 1;
  padding: 20px;
}

header {
  background-color: #333;
  color: white;
  text-align: center;
  padding-bottom: 15px;
}

header p {
  margin: 5px 0 0;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  padding: 10px 0;
  margin: 0;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: white;
}

nav ul li a:hover {
  text-decoration: underline;
}

iframe {
  display: block;
  margin: 20px auto;
}

footer {
  text-align: center;
  padding: 15px;
  background-color: #333;
  color: white;
}

.about {
padding: 20px;
text-align: center;
}

.btn {
  display: inline-block;
  align-self: center;
  margin-top: 0;
  padding: 10px 15px;
  background-color: #333;
  color: white;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #555;
}

.contact {
  max-width: 600px;
  margin: 30px auto;
  padding: 20px;
  background-color: white;
}

.contact h1 {
  text-align: center;
}

.contact label {
  display: block;
  margin-top: 10px;
}

.contact input,
.contact textarea {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
}

.contact button {
  margin-top: 15px;
  padding: 10px;
  background-color: #333;
  color: white;
  border: none;
  cursor: pointer;
}

.contact button:hover {
  background-color: #555;
}

.iframe-demo {
  text-align: center;
}

.iframe-demo a {
  display: inline-block;
  margin-top: 10px;
}

.intro {
  max-width: 600px;
  margin: 40px auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.intro p {
  margin-bottom: 0;
}

.intro img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 8px;
  margin: 0 auto;
}

.profile-img {
max-width: 100%;
height: auto;
border-radius: 10px;
}

.research-table {
  max-width: 1000px;
  margin: 40px auto;
  overflow-x: auto;
}

.research-table table {
  width: 100%;
  border-collapse: collapse;
  background-color: white;
}

.research-table th,
.research-table td {
  border: 1px solid #ccc;
  padding: 10px;
}

.research-table th:not(:nth-child(3)),
.research-table td:not(:nth-child(3)) {
  white-space: nowrap;
}

.research-table td {
  text-align: left;
}

.research-table th {
  text-align: center;
  background-color: #333;
  color: white;
}

.research-table tr:nth-child(even) {
  background-color: #f9f9f9;
}

.resume-table {
width: 80%;
margin: 20px auto;
border-collapse: collapse;
}

.resume-table th, .resume-table td {
border: 1px solid #333;
padding: 10px;
text-align: center;
}

.resume-table th {
background-color: #f4f4f4;
}

.video-player {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px;
  background-color: white;
  border-radius: 10px;
}

@media screen and (max-width: 768px) {
  nav ul {
    flex-direction: column;
  }

  .about {
  padding: 10px;
  }

  .contact {
    padding: 10px;
    margin: 20px;
  }

  .profile-img {
  width: 80%;
  }
}

@media screen and (max-width: 768px) {
.resume-table {
width: 100%;
font-size: 14px;
}

.resume-table th, .resume-table td {
padding: 8px;
}
}