/* ======================== */
/* КНОПКА "НАВЕРХ" */
/* ======================== */

.scroll-to-top {
    position: fixed;
    bottom: 3vw;
    left: 3vw;
    width: 3.2vw;
    height: 3.2vw;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-heavy);
    opacity: 0;
    visibility: hidden;
    transform: translateY(2vw);
    transition: var(--transition-normal);
  }
  
  .scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .scroll-to-top:hover {
    background-color: var(--color-primary-hover);
    transform: scale(1.1);
  }
  
  .scroll-to-top svg {
    width: 1.6vw;
    height: 1.6vw;
  }
  
  @media (max-width: 768px) {
    .scroll-to-top {
      width: 8vw;
      height: 8vw;
      bottom: 5vw;
      left: 5vw;
    }
  
    .scroll-to-top svg {
      width: 4vw;
      height: 4vw;
    }
  }