.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.75);
    justify-content: center;
    align-items: center;
    z-index: 99999;
}
.modal.show { display: flex; }
.modal video { max-width: 90vw; max-height: 80vh; }
.close {
position: fixed;
top: 20px; right: 30px;
font-size: 32px; color: #fff; cursor: pointer;
z-index: 99999;
}