/* Schwebender „Nach oben“-Knopf (Vorschlag A, Bee 21.10.2026) */
.nach-oben {
    position: fixed;
    right: 16px;
    bottom: 16px;
    width: 52px;
    height: 52px;
    padding: 0;
    border: 3px solid #fff;
    border-radius: 50%;
    background: var(--green-schrift, #1f7a0a);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35);
    cursor: pointer;
    z-index: 4;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .25s, transform .25s, visibility .25s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.nach-oben.sichtbar { opacity: 1; visibility: visible; transform: none; }
.nach-oben:hover { background: var(--green-schrift-hover, #1a6304); }
.nach-oben svg { width: 26px; height: 26px; display: block; fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
@media (min-width: 1041px) { .nach-oben { right: 24px; bottom: 24px; } }
@media (prefers-reduced-motion: reduce) { .nach-oben { transition: none; } }