* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background-color: #353E43;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
}
.main-heading-container {
  background-color: #ffffff;
  padding: 10px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 4px solid aquamarine;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.main-heading {
  color: rgb(255, 115, 0);
  font-size: 24px;
}
.group-logo {
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: block;
  transition: transform 0.3s ease;
}
.group-logo:hover {
  transform: scale(1.1);
}
.nav-button {
  text-decoration: none;
  color: #353E43;
  background-color: #f0f0f0;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: bold;
  transition: all 0.3s ease;
  border: 1px solid #ddd;
}
.nav-button:hover {
  background-color: #1a1a1a;
  color: white;
}
.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
}
.section-heading {
  color: white;
  font-size: 32px;
  border-bottom: 2px solid aquamarine;
  margin-bottom: 60px;
  padding-bottom: 10px;
}
.team-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  width: 100%;
  max-width: 1100px;
}
.person-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 250px;
}
.photo-container {
  position: relative;
  margin-bottom: 30px;
}
.team-photo {
  width: 220px;
  height: 280px;
  object-fit: cover;
  border-radius: 15px;
  display: block;
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}
.grade-badge {
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1a1a1a;
  color: white;
  padding: 6px 25px;
  border-radius: 8px;
  font-weight: bold;
  font-size: 14px;
  z-index: 10;
  border: 1px solid aquamarine;
}
.person-details {
  color: white;
  text-align: left;
  cursor: pointer;
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  padding: 15px;
  border-radius: 12px;
  transition: all 0.3s ease;
  border: 1px solid rgba(127, 255, 212, 0.1);
}
.person-details:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-5px);
}
.person-details summary {
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  display: flex;
  align-items: center;
  outline: none;
  user-select: none;
}
.person-details summary::-webkit-details-marker {
  display: none;
}
.person-details summary::before {
  content: '';
  width: 8px;
  height: 8px;
  border-top: 2px solid aquamarine;
  border-right: 2px solid aquamarine;
  margin-right: 12px;
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}
.person-details[open] summary::before {
  transform: rotate(135deg);
}
.slide-content {
  font-size: 14px;
  margin-top: 12px;
  padding: 10px 0 10px 15px;
  color: #bdc3c7;
  border-left: 2px solid aquamarine;
  animation: slideDown 0.4s ease-out;
}
.role-title {
  color: aquamarine;
  font-weight: bold;
  font-size: 13px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
@keyframes slideDown {
  0% { opacity: 0; transform: translateY(-10px); }
  100% { opacity: 1; transform: translateY(0); }
}