.fullscreen-btn {
    position: relative;
    z-index: 1000;
    background: var(--background-color);
    color: var(--color-text);
    border: none;
    border-radius: 2px;
    padding: var(--space-xxs-y) var(--space-xs-x);
    font-size: var(--font-size-m);
    cursor: pointer;
    transition: all 0.2s;
    opacity: 0.85;
}

.fullscreen-btn:hover,
.fullscreen-btn:active {
    background-color: color-mix(in srgb, var(--background-color), #fff 20%);
    transform: scale(1.1);
    opacity: 1;
}