/* ============================================
   SCROLL TO TOP BUTTON
   ============================================

   Shared scroll-to-top button component
   Used across: all pages
   ============================================ */

.scroll-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50px;
    border: 1px solid rgba(148, 163, 184, 0.8);
    background: var(--dark-alt);
    color: #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 40;
    font-size: 1.1rem;
    backdrop-filter: blur(10px);
}

.scroll-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background: var(--brand-orange);
    border-color: rgba(148, 163, 184, 1);
    transform: translateY(-2px);
}

.scroll-top:focus {
    outline: 2px solid var(--dark-alt);
    outline-offset: 2px;
}

.scroll-top:active {
    transform: translateY(0);
}