.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    z-index: -1;
    transition: all 0.3s ease-in-out;
}

.modal.open {
    opacity: 1;
    z-index: 999;
}

/* --- DESKTOP: canto inferior direito --- */
.modal-inner {
    position: absolute;
    bottom: 6rem;
    right: 1.875rem;
    max-width: 25rem;
    width: calc(100% - 3.75rem);
    box-sizing: border-box;

    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    padding: 2.5rem;
}

/* --- MOBILE: centralizado --- */
@media (max-width: 768px) {
    .modal {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .modal-inner {
        position: relative;
        bottom: auto;
        right: auto;
        max-width: 90%;
        width: 100%;
        margin: 1rem;
        transform: none;
    }
}