body.app-region-rail {
  padding-left: clamp(66px, 6.5vw, 82px);
  --app-whatsapp-logo-url: url("https://hub.steammasterglobal.com/images/whatsapp-logo.png");
  --app-rail-active-border: rgba(226, 0, 0, 0.24);
  --app-rail-active-background: rgba(226, 0, 0, 0.08);
}

body.app-region-rail .region-switcher[data-switcher-kind="app"] {
  display: none !important;
}

.app-region-rail-nav {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 96;
  width: clamp(66px, 6.5vw, 82px);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.15rem 0.38rem;
  pointer-events: auto;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.app-region-rail-nav__list {
  display: flex;
  flex-direction: column;
  gap: clamp(0.8rem, 1.7vh, 1.05rem);
  width: 100%;
  align-items: center;
  justify-content: center;
}

.app-region-rail-nav__item {
  display: grid;
  place-items: center;
  position: relative;
  width: calc(100% - 10px);
  min-height: 6.25rem;
  border: 1px solid rgba(15, 23, 42, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.84);
  color: transparent;
  font-size: 0;
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  overflow: hidden;
  cursor: pointer;
}

.app-region-rail-nav__item::before {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-90deg);
  transform-origin: center;
  white-space: nowrap;
  color: #1a1a1a;
  font-size: clamp(0.76rem, 1.26vw, 0.86rem);
  font-weight: 700;
  line-height: 1;
}

.app-region-rail-nav__item[data-label="INTERNATIONAL"]::before {
  font-size: clamp(0.7rem, 1.1vw, 0.76rem);
}

.app-region-rail-nav__item:hover {
  border-color: rgba(226, 0, 0, 0.32);
  background: #ffffff;
}

.app-region-rail-nav__item.is-current {
  border-color: var(--app-rail-active-border);
  background: var(--app-rail-active-background);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.app-region-rail-nav__item.is-current::before {
  color: #1a1a1a;
  font-weight: 800;
}

.site-floating-whatsapp {
  position: fixed;
  right: clamp(1rem, 2.2vw, 2rem);
  bottom: clamp(1rem, 2.2vw, 2rem);
  z-index: 110;
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 50%;
  background-color: #ffffff;
  background-image: var(--app-whatsapp-logo-url);
  background-position: center;
  background-repeat: no-repeat;
  background-size: 88%;
  box-shadow: 0 10px 28px rgba(18, 140, 74, 0.3);
  animation: app-whatsapp-pulse 2s ease-in-out infinite;
}

.site-floating-whatsapp:hover { transform: translateY(-2px) scale(1.04); }
.site-floating-whatsapp:focus-visible { outline: 3px solid rgba(37, 211, 102, 0.45); outline-offset: 3px; }

@keyframes app-whatsapp-pulse {
  0%, 100% { box-shadow: 0 10px 28px rgba(18, 140, 74, 0.3), 0 0 0 0 rgba(37, 211, 102, 0.38); }
  50% { box-shadow: 0 12px 32px rgba(18, 140, 74, 0.36), 0 0 0 12px rgba(37, 211, 102, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .site-floating-whatsapp { animation: none; }
}

@media (max-width: 640px) {
  body.app-region-rail {
    padding-left: 42px;
  }

  .app-region-rail-nav {
    top: 4.75rem;
    width: 42px;
    min-height: 0;
    padding: 0.45rem 0.12rem;
  }

  .app-region-rail-nav__list {
    gap: 0.54rem;
  }

  .app-region-rail-nav__item {
    width: calc(100% - 6px);
    min-height: 4.45rem;
  }

  .site-floating-whatsapp { width: 3.25rem; height: 3.25rem; }

  .app-region-rail-nav__item::before {
    font-size: 0.58rem;
    letter-spacing: 0.01em;
  }
}