.site-rail {
  position: fixed;
  z-index: 40;
  top: 50%;
  right: 22px;
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  pointer-events: none;
  transform: translate(14px, -50%);
  transition: opacity .24s ease, transform .24s ease;
}

.site-rail.is-visible {
  opacity: .58;
  pointer-events: auto;
  transform: translate(0, -50%);
}

.site-rail.is-visible:hover,
.site-rail.is-visible:focus-within { opacity: 1; }

.site-rail__steps {
  position: relative;
  display: flex;
  padding: 12px 8px;
  align-items: center;
  flex-direction: column;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  background: rgba(7,24,39,.82);
  box-shadow: 0 12px 34px rgba(7,17,31,.16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-rail__steps::before {
  position: absolute;
  top: 25px;
  bottom: 25px;
  left: 50%;
  width: 1px;
  background: rgba(255,255,255,.16);
  content: "";
  transform: translateX(-50%);
}

.site-rail__link {
  position: relative;
  display: grid;
  width: 22px;
  height: 28px;
  place-items: center;
  color: #fff;
  text-decoration: none;
}

.site-rail__dot {
  position: relative;
  z-index: 1;
  width: 6px;
  height: 6px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 999px;
  background: #0b2131;
  transition: width .18s ease, height .18s ease, border-color .18s ease, background .18s ease;
}

.site-rail__link:hover .site-rail__dot,
.site-rail__link:focus-visible .site-rail__dot {
  border-color: #62e3ec;
}

.site-rail__link[aria-current="location"] .site-rail__dot {
  width: 8px;
  height: 17px;
  border-color: #62e3ec;
  background: #62e3ec;
}

.site-rail__label {
  position: absolute;
  top: 50%;
  right: calc(100% + 11px);
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  color: rgba(255,255,255,.9);
  background: rgba(7,24,39,.94);
  box-shadow: 0 8px 24px rgba(7,17,31,.16);
  font: 600 11px/1.2 Inter, Arial, sans-serif;
  opacity: 0;
  pointer-events: none;
  transform: translate(5px, -50%);
  transition: opacity .16s ease, transform .16s ease;
  white-space: nowrap;
}

.site-rail__link:hover .site-rail__label,
.site-rail__link:focus-visible .site-rail__label {
  opacity: 1;
  transform: translate(0, -50%);
}

.site-rail__top {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(#0a2030, #0a2030) padding-box,
              linear-gradient(135deg, #62e3ec, #315cf4) border-box;
  box-shadow: 0 10px 28px rgba(7,17,31,.2);
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}

.site-rail__top:hover,
.site-rail__top:focus-visible {
  box-shadow: 0 12px 32px rgba(7,17,31,.28);
  transform: translateY(-2px);
}

.site-rail__top svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 1180px) {
  .site-rail {
    top: auto;
    right: 16px;
    bottom: 16px;
    transform: translateY(12px);
  }

  .site-rail.is-visible {
    opacity: .72;
    transform: none;
  }
  .site-rail.is-visible:hover,
  .site-rail.is-visible:focus-within { opacity: 1; }
  .site-rail__steps { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .site-rail,
  .site-rail__dot,
  .site-rail__label,
  .site-rail__top { transition: none; }
}