.button {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 1050;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: none;
    background-color: var(--primary);
    color: var(--font-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
    background-color: #0a6cc2;
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.4);
}

.button:focus-visible {
    outline: 2px solid var(--font-white);
    outline-offset: 2px;
}