/* ==========================================================================
   Seitennavigation rechts (wird per JS aus section[data-nav] erzeugt)
   ========================================================================== */
.railnav {
  position: fixed;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.railnav a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  min-height: 34px;
  min-width: 44px;
  text-decoration: none;
}
.railnav a::after {
  content: "";
  width: 14px;
  height: 12px;
  flex: 0 0 14px;
  background: var(--green-700);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  opacity: 0.7;
  filter: drop-shadow(0 0 1px rgba(255, 255, 255, 0.95));
  transition:
    opacity 0.2s,
    background 0.2s;
}
.railnav a:hover::after,
.railnav a.is-active::after {
  opacity: 1;
  background: var(--green-300);
}
.railnav span {
  padding: 5px 12px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--green-700);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  opacity: 0;
  transform: translateX(8px);
  transition:
    opacity 0.2s,
    transform 0.2s;
}
.railnav a:hover span,
.railnav a:focus-visible span {
  opacity: 1;
  transform: none;
}

@media (max-width: 820px) {
  .railnav {
    display: none;
  }
}