/* RESET */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* GLOBAL */
body {
  font-family: Arial, Helvetica, sans-serif;
  color: #333;
  line-height: 1.5;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* HEADER / NAV */
header {
  border-bottom: 1px solid #ddd;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}

.logo {
  font-size: 20px;
  font-weight: bold;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 16px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
}

/* HERO */
.hero {
  display: flex;
  background-color: #e5e5e5;
}

.hero img {
  height: 70%;
  width: 60%;
  object-fit: cover;
}

.hero-text {
  padding: 40px;
}

.hero-text p {
  margin: 16px 0;
}

.hero button {
  padding: 12px 24px;
  background-color: #333;
  color: white;
  border: none;
  cursor: pointer;
}

/* INFO SECTION */
.info {
  display: flex;
  gap: 24px;
  padding: 32px;
}

.info-left {
  width: 60%;
}

.info-left img {
  height : 70%;
  width: 70%;
  margin-bottom: 24px;
}

.info-right {
  width: 40%;
}

.info-card {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.info-card img {
  width: 35%;
  height: 120px;
  object-fit: cover;
}

.info-card a {
  color: #4a90e2;
  text-decoration: none;
}

/* COURSES */
.courses {
  background-color: #f2f2f2;
  padding: 32px;
}

.courses h2 {
  text-align: center;
  margin-bottom: 24px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.course-card {
  background-color: white;
  padding: 16px;
}

.course-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  margin-bottom: 12px;
}

/* THESIS */
.thesis {
  padding: 32px;
}

.thesis h2 {
  text-align: center;
  margin-bottom: 24px;
}

.thesis-content {
  display: flex;
  gap: 24px;
}

.thesis-left {
  width: 60%;
}

.thesis-left video {
  width: 100%;
  margin-bottom: 16px;
}

.thesis-right {
  width: 40%;
}

.thesis-card {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.thesis-card img {
  width: 35%;
  height: 120px;
  object-fit: cover;
}

/* FOOTER */
footer {
  display: flex;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: #f2f2f2;
  font-size: 14px;
}

footer a {
  margin-left: 16px;
  text-decoration: none;
  color: #333;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    flex-direction: column;
  }

  .hero img {
    width: 100%;
  }

  .info {
    flex-direction: column;
  }

  .info-left{
    width: 180%;
    height: 150%;
  }

  .info-right{
    height: 80%;
    width: 100%;
  }

  .info-card img {
    width: 100%;
    height: 100px;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .thesis-content {
    flex-direction: column;
  }

  .thesis-left,
  .thesis-right {
    width: 100%;
  }
}