body {
    background-color: skyblue;
}

/* ── Layer switcher drop-up (bottom-right) ────────────────────────────── */
#ls-layer-switch {
    position: fixed;
    bottom: 33px;
    right: 18px;
    z-index: 1000;
    font-family: var(--bs-font-sans-serif, system-ui, sans-serif);
    font-size: 0.875rem;
}

#ls-layer-switch .ls-layer-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0 0.75rem;
    height: 40px;
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .35);
    white-space: nowrap;
    transition: background .15s;
}
#ls-layer-switch .ls-layer-toggle:hover {
    background: #222;
}
#ls-layer-switch .ls-chevron {
    font-size: 0.55rem;
    line-height: 1;
}

#ls-layer-switch .ls-layer-menu {
    list-style: none;
    margin: 0;
    padding: 0.25rem 0;
    position: absolute;
    bottom: calc(100% + 2px);
    right: 0;
    background: #000;
    border-radius: 4px;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, .4);
    min-width: 130px;
    overflow: hidden;
}

#ls-layer-switch .ls-layer-item {
    display: block;
    width: 100%;
    padding: 0.5rem 0.9rem;
    background: none;
    border: none;
    color: #fff;
    font-size: 0.875rem;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: background .12s;
    white-space: nowrap;
}
#ls-layer-switch .ls-layer-item:hover {
    background: #333;
}
#ls-layer-switch .ls-layer-item[aria-selected="true"] {
    background: #222;
    padding-left: 0.5rem;
}
#ls-layer-switch .ls-layer-item[aria-selected="true"]::before {
    content: '✓\00a0';
}