.scroll-fixed-btns {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  gap: 14px;
  z-index: 10000;
  user-select: none;
  pointer-events: none; /* для контейнера */
}

/* Стили для кнопок */
.scroll-btn {
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 14px;
  background: rgba(27, 202, 209, 0.66); /* прозрачный бирюзовый фон */
  backdrop-filter: blur(2.5px) saturate(160%);
  box-shadow: 0 8px 28px 0 rgba(30,170,185,0.17), 0 1px 4px 0 rgba(12, 49, 90, 0.09);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: 
    background 0.19s,
    box-shadow 0.18s,
    opacity 0.28s,
    transform 0.16s;
  outline: none;
}

.scroll-btn svg {
  filter: drop-shadow(0 2px 8px rgba(20,164,220,0.20));
  transition: transform 0.17s, filter 0.21s;
}

.scroll-btn-down:hover svg { 
  transform: translateY(5px) scale(1.12); 
  filter: drop-shadow(0 3px 13px rgba(20,170,180,0.44)); 
}
.scroll-btn-up:hover svg { 
  transform: translateY(-5px) scale(1.12); 
  filter: drop-shadow(0 3px 13px rgba(20,170,180,0.44)); 
}

.scroll-btn.visible {
  opacity: 0.84;
  pointer-events: auto;
}

.scroll-btn:active {
  transform: scale(0.97);
  background: rgba(27,202,209,0.98);
}

.scroll-btn:not(.visible) {
  pointer-events: none;
}

/* Улучшения на мобильных */
@media (max-width: 700px) {
  .scroll-fixed-btns { gap: 5px; bottom: 8px;}
  .scroll-btn { width: 38px; height: 38px; border-radius: 8px;}
  .scroll-btn svg { width: 18px; height: 18px;}
}