#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(31, 31, 31, 0.3);
    display: none;
}

@media (max-width: 768px) {
    #overlay.active {
        display: block;
        z-index: 9;
    }
}

/* Back button — base styles (light bg default) */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    margin: 0 0 0.75rem;
    align-self: flex-start;
    border-radius: 999px;
    background: transparent;
    color: var(--secondary, #1d466e);
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--secondary, #1d466e);
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.back-button:hover {
    background: var(--secondary, #1d466e);
    color: #fff;
    transform: translateX(-2px);
}

.back-button svg {
    flex-shrink: 0;
}