body {
  font-family: 'Montserrat', sans-serif;
  background-color: #0d0d0d;
  color: #fff;
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  padding: 30px 10px;
  background: #0a0a0a;
  border-bottom: 2px solid #0f3d2e;
}

.logo {
  height: 70px;
  margin-bottom: 10px;
}

h1 {
  font-weight: 600;
  font-size: 32px;
}

.focus {
  color: #fff;
}

.vision {
  color: #0f8b47;
}

.subtitle {
  font-size: 13px;
  color: #999;
}

.subtitle a {
  color: #90ffb3;
  text-decoration: none;
}

.course-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 25px;
  padding: 30px;
}

.course {
  background: #111;
  border: 2px solid #0f3d2e;
  border-radius: 18px;
  padding: 20px;
  width: 280px;
  text-align: center;
  transition: all 0.25s ease;
  cursor: pointer;
}

.course:hover {
  transform: scale(1.05);
  background: #1b3d30;
}

.icon {
  font-size: 40px;
  color: #0f8b47;
  margin-bottom: 10px;
}

.topics {
  list-style: none;
  padding: 0;
  display: none;
  margin-top: 15px;
}

.topics li {
  margin: 6px 0;
}

.topics a {
  color: #90ffb3;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.topics a:hover {
  color: #fff;
}

@media (max-width: 768px) {
  .course-container {
    flex-direction: column;
    align-items: center;
  }

  .course {
    width: 90%;
  }
}


.version-tag {
  font-size: 0.9rem;
  color: #7abf84;
  font-weight: 500;
  margin-top: 6px;
  letter-spacing: 0.5px;
  opacity: 0.85;
}