body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: #e46b25;
}

.container {
  width: 900px;
  margin: 0 auto;
  background: #ffffff;
  padding-bottom: 40px;
}


/* footer */
.footer {
  width: 900px;
  margin: 0 auto;
  background: #e46b25;
  padding-top: 40px;
  padding-bottom: 40px;
}

.footer_bundle {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}

.footer_info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  margin-right: 15px;
  font-size: 16px;
  line-height: 1.3;
  color: #1c1c1c; 
}

.footer_info p {
  margin: 0;
  text-decoration: underline;
  text-decoration-color: #bf4e16;
  text-decoration-thickness: 1px;
  display: inline-block;
}


/* header */
header {
  background-color: #e46b25;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo_bundle {
  width: 900px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  margin-top: 20px;
  margin-bottom: 20px;
  width: 200px;
  height: auto;
}

.gachonlogo {
  right: 20px;
  width: 250px;
  height: auto;
}


/* menu */
.menu {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 25px;
  margin-bottom: 5px;
}

.menu a {
  margin: 0 15px;
  font-size: 20px;
  color: #ffffff;
  text-decoration: none;
}

.menu a.active {
  font-weight: bold;
  color: #1c1c1c;
}

.dropdown {
  position: relative;
}

.dropdown_bundle {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background:#e46b25;
  width: 200px;
  flex-direction: column;
  z-index: 1000;
  text-align: justify;
}

.dropdown_bundle a {
  margin-top: 15px;
  margin-bottom: 15px;
  text-decoration: none;
  color: #ffffff;
  font-size: 16px;
  text-align: justify;
}

.dropdown_bundle a:hover {
  background-color: #e46b25;
  color: #1c1c1c;
}

.dropdown:hover .dropdown_bundle {
  display: flex;
}

/* main */
.section_title {
  margin-left: 15px;
  background: #ffffff;
  margin-top: 40px;
  color: #e46b25;
  font-size: 30px;  
}


/* Home */
.lab {
  margin-left: 30px;
  margin-right: 30px;
  background: #ffffff;
}

.lab_title {
  font-size: 30px;
  font-weight: 600;
  color: #1c1c1c;
  margin-top: 40px;
  margin-bottom: 40px;
}

.lab_title p {
  margin: 0;
  font-size: 17px;
  text-align: justify;
}

.lab_title .highlight {
  color: #e46b25;
}

.lab_info {
  flex: 1;
  min-width: 0;
  text-align: center;
}

.lab_image {
  width: 400px;
  height: auto;
  margin-top: 20px;
  flex-shrink: 0;
  margin: 20px auto;
}

.slideshow {
  position: relative;
  width: 400px;
  height: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: #f2f2f2;
}

.slide {
  display: none;
  width: 100%;
  height: auto;
  object-fit: contain;
  position: absolute;
  left: 0;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.slide.active {
  display: block;
}

.dots {
  text-align: center;
  margin-top: 10px;
}

.dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin: 6px;
  border-radius: 50%;
  background-color: #e6e6e6;
  cursor: pointer;
  transition: background-color 0.3s;
}

.dot.active {
  background-color: #e46b25;
}

.dot:hover {
  background-color: #e46b25;
}

.quote {
  margin: 0;
  font-size: 20px;
  color: #1c1c1c;
  text-align: center;
}

.quote .highlight {
  color: #e46b25;
}

.mission {
  margin: 0;
  font-size: 15px;
  color: #1c1c1c;
}


/* Principal Investigator */
.professor {
  margin-left: 30px;
  background: #ffffff;
}

.professor_bundle {
  display: flex;
  align-items: center;
  gap: 50px;
  padding: 20px 0;
}

.professor h1 {
  margin-top: 40px;
  color: #e46b25;
  font-size: 20px;
}

.professor_image img {
  width: 170px;
  height: auto;
  object-fit: cover;
}

.professor_info {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  text-align: left;
}

.professor_info h2 {
  font-size: 20px;
  color: #1c1c1c;
}

.professor_info p {
  margin: 0;
  font-size: 16px;
  color: #1c1c1c;
  line-height: 1.3;
}

.professor_info a {
  color: #e46b25;
}

.professor_education {
  margin-left: 30px;
  margin-right: 30px;
  margin-top: 30px;
  background: #ffffff;
}

.professor_education h2 {
  color: #e46b25;
  font-size: 20px;
}

.professor_education p {
  margin-left: 10px;
}


/* Students */
.student {
  background: #ffffff;
  margin-left: 30px;
}

.student h1 {
  margin-top: 40px;
  color: #e46b25;
  font-size: 20px;
}

.student_bundle {
  display: flex;
  gap: 50px;
  margin-top: 20px;
}

.student_image img {
  width: 120px;
  height: 160px;
}

.student_info {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.student_info h2 {
  font-size: 20px;
  color: #1c1c1c;
}

.student_info p {
  margin: 0;
  font-size: 16px;
  color: #1c1c1c;
  line-height: 1.3;
}


/* Research */
.research_bundle {
  margin-left: 30px;
  margin-bottom: 100px;
  background: #ffffff;
}

.research_bundle h2 {
  color: #1c1c1c;
  font-size: 20px;
}

.research_info {
  margin-left: 15px;
  margin-right: 45px;
  color: #1c1c1c;
  font-size: 16px;
  gap: 15px;
}

.research_image {
  display: block;
  margin: 0 auto;
  width: 500px;
  height: auto;
  object-fit: cover;
}

.small_image {
  width: 50%;
  height: auto;
}

.research_image_bundle {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.research_bundle .highlight {
  color: #e46b25;
}


/* Publications */
.publication {
  margin-left: 30px;
  background: #ffffff;
}

.publication h2 {
  font-size: 20px;
  color: #e46b25;
}

.publication_bundle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-right: 30px;
}

.corresponding_authors {
  color: #e46b25;
  font-size: 18px;
  margin-bottom: 0;
  font-family: "Times New Roman", Times, serif;
}

.year_bundle {
  margin-bottom: 50px;
}

.year {
  margin-left: 10px;
  font-weight: bold;
  color: #e46b25;
  font-size: 18px;
}

.journal_papers {
  margin-left: 15px;
  margin-right: 45px;
  color: #1c1c1c;
  margin-top: 0;
}

.journal_papers a {
  color: #e46b25;
}

.journal_papers_title {
  color: #e46b25;
  font-size: 18px;
  margin-bottom: 0;
  font-family: "Times New Roman", Times, serif;
}

.journal_papers_info {
  margin-top: 0;
  font-size: 18px;
  font-family: "Times New Roman", Times, serif;
}

.journal_papers_info i {
  font-style: italic;
}


/* Patents */
.patents {
  margin-left: 15px;
  font-size: 18px;
  color: #e46b25;
}


/* News */
.news {
  margin-left: 30px;
  background: #ffffff;  
}

.news_bundle {
display: flex;
margin-bottom: 30px;
align-items: center;
}

.news_info h2 {
  margin-bottom: 5px;
}

.news_title {
  font-size: 20px;
  color: #e46b25;
}

.news_info p {
  font-size: 16px;
  color: #1c1c1c;
  margin-top: 0;
  margin-left: 5px;
}

.news_info .highlight {
  color: #e46b25;
}

.news_year {
  font-size: 16px;
  font-weight: normal;
  color: #e46b25;
}

.news_image {
  margin-top: 10px;
  margin-left: 5px;
  width: 220px;
  height: auto;
  display: block;
}