:root{
  --sidebar-top: clamp(120px, 12vh, 168px); /* tune the numbers if you want it lower/higher */
}

.igem-scroll-sidebar {
  position: fixed;
  top: var(--sidebar-top);                /* was 100px */
  left: 20px;
  width: min-content;    /*responsive to screen size */
  /* make the internal scroll area stop before the footer */
  max-height: calc(100vh - var(--sidebar-top) - 24px);  /* was calc(100vh - 140px) */
  background-color: #e65824;
  border-radius: 12px;
  padding: 20px 15px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 20px; /* Slightly smaller to fit more */
  z-index: 1000;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  overflow-y: auto; /* Allows scrolling within sidebar if needed */
  overscroll-behavior: contain;      /* prevent scroll chaining to the page */
  overflow-anchor: none;             /* avoid scroll anchoring jitters */
  -webkit-overflow-scrolling: touch; /* smooth inertial scrolling on iOS */
}

body.scrolled .igem-scroll-sidebar {
  opacity: 1;
  transform: translateX(0);
}

.igem-scroll-sidebar ul {
  margin: 0;
  list-style: none;
  padding: 0;
}

.igem-scroll-sidebar li {
  margin-bottom: 8px; /* Tighter spacing */
}

.igem-scroll-sidebar > ul > li > a {
  background-image: url('https://static.igem.wiki/teams/5571/images/icons/bp2.svg');
  background-size: 14px 14px; /* Slightly smaller bullets */
  background-position: 10px center;
  background-repeat: no-repeat;
  filter: brightness(0) invert(1);
  padding-left: 32px;
  padding-right: 12px;
  line-height: 1.3; /* Better for multi-line text */
}

.igem-dropdown-toggle {
  position: relative;
  padding-right: 28px !important; 
}

.igem-dropdown-toggle::after {
  content: "▼";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.6em;
  transition: transform 0.3s ease;
}

.igem-scroll-sidebar > ul > li > a:not(.igem-dropdown-toggle) {
  padding-right: 12px !important;
}

.igem-dropdown.igem-active .igem-dropdown-toggle::after {
  transform: translateY(-50%) rotate(180deg);
}

.igem-scroll-sidebar a {
  color: #ffffff;
  text-decoration: none;
  transition: all 0.3s ease;
  display: block;
  padding: 6px 10px; /* Tighter padding */
  border-radius: 6px;
  word-wrap: break-word; /* Handle long text */
}

.igem-scroll-sidebar a:hover {
  background-color: rgba(0, 0, 0, 0.2);
  transform: translateX(5px);
}

.igem-dropdown-menu {
  display: none;
  margin-left: 8px;
  margin-top: 4px;
  padding: 0;
  list-style: none;
  border-left: 2px solid rgba(255, 255, 255, 0.3);
}

.igem-dropdown.igem-active .igem-dropdown-menu {
  display: block;
}

.igem-dropdown-menu li {
  margin-bottom: 4px;
}

.igem-dropdown-menu a {
  background-image: url('https://static.igem.wiki/teams/5571/images/icons/bp2.svg');
  background-size: 10px 10px; /* Smaller dropdown bullets */
  background-position: 6px center;
  background-repeat: no-repeat;
  filter: brightness(0) invert(1);
  padding-left: 22px;
  padding: 5px 10px 5px 22px;
  font-size: 0.75em; /* Smaller dropdown text */
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 4px;
}

.igem-dropdown-menu a:hover {
  background-color: rgba(0, 0, 0, 0.3);
  transform: translateX(3px);
}

/* Custom scrollbar for sidebar */
.igem-scroll-sidebar::-webkit-scrollbar {
  width: 6px;
}

.igem-scroll-sidebar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.igem-scroll-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

.igem-scroll-sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.5);
}

@keyframes igem-fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}