.modal-overlay{
    position: fixed;
    inset: 0;
    background:var(--modal-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    backdrop-filter:blur(6px);
    transition: opacity 0.4s ease, visibility 0.4s ease;
    z-index: 9999;
}

.modal-overlay.active{
    opacity: 1;
    visibility: visible;
}

.modal-box{
    background: var(--modal-bg);
    color: var(--modal-text);
    padding: 2.3rem 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 60px var(--modal-shadow);
    transform: translateY(40px);
    opacity: 0;
    transition:transform 0.4s ease, opacity 0.4s ease;
    width: 90%;
    max-width: 590px;
}

.modal-overlay.active .modal-box{
    transform: translateY(0);
    opacity: 1;
}

/* animação interna suave */
.modal-box > *{
    opacity: 0;
    transform: translateY(15px);
    transition:opacity 0.4s ease, transform 0.4s ease;
}

.modal-overlay.active .modal-box > *:nth-child(1){ transition-delay: 0.2s; opacity:1; transform:translateY(0);}
.modal-overlay.active .modal-box > *:nth-child(2){ transition-delay: 0.35s; opacity:1; transform:translateY(0);}
.modal-overlay.active .modal-box > *:nth-child(3){ transition-delay: 0.5s; opacity:1; transform:translateY(0);}
.modal-overlay.active .modal-box > *:nth-child(4){ transition-delay: 0.65s; opacity:1; transform:translateY(0);}

.modal-icon{
    font-size: 4rem;
    color: var(--color-tertiary);
    margin-bottom: 1rem;
}

.modal-box h2,.modal-box p{
    color:var(--texto);
    font-family:Source Code Pro,monospace;
    font-weight:500;
    font-size: clamp(1.2rem, 2vw, 1.4rem);
}

.modal-box p{
    margin-top:0.35rem;
    font-weight:400;
    font-size: clamp(0.90rem, 1.2vw, 1rem);
}

.modal-overlay.active .modal-box > *:nth-child(4){
    margin-top: 1.5rem;
    padding: 0.75rem 1.8rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    will-change:transform;

    font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-weight: 600;
    font-size:0.95rem;
    letter-spacing: 0.3px;
    text-align: center;

    background:var(--color-tertiary);
    box-shadow: 0 0px 4px var(--sombra);
    color:var(--sombra);

    transition-delay: 0.1s;
    transition:transform 0.25s ease,
        box-shadow 0.25s ease,
        filter 0.25s ease;
}

.modal-overlay.active .modal-box button:hover{
    transform:translateY(0) scale(1.1);
    box-shadow: 0px 2px 7px var(--sombra);
    filter: brightness(1.05);
}