/* minimal reset */
html,
body {
    height: 100%;
    margin: 0;
    box-sizing: border-box;
}

body {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    min-height: 100vh;
    /* ensures grid covers viewport */
    overflow: hidden;
}

/* normal page content sits in the grid */
.page {
    grid-area: 1/1;
    padding: 1rem;
}

/* gallery layout (inside page) */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    padding: 0;
    margin: 0;
    list-style: none;
}


/* ---------- overlay that covers the whole viewport using grid ---------- */
.overlay {
    grid-area: 1/1;
    /* span all rows of body grid */
    display: grid;
    place-items: center;
    /* center inner content */
    background: rgba(0, 0, 0, 0.75);
    z-index: 50;
    visibility: hidden;
    opacity: 0;
    transition: opacity 600ms ease, visibility 0s linear 200ms;
}

/* visible state */
.overlay.open {
    visibility: visible;
    opacity: 1;
    transition-delay: 200ms;
}

/* inner wrapper to control iframe size */
.overlay-inner {
    width: 80vw;
    height: 80vh;
    display: grid;
    place-items: center;
    padding: 0;
    margin: 0;
}

/* iframe fills viewport (like inset:0) */
.overlay-inner iframe {
    grid-area: 1/1;
    border: 0;
    display: block;
    width: 100%;
    height: 100%;
}

/* close button */
.overlay-close {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    padding: 0.5rem 0.6rem;
    font-size: 1.1rem;
    cursor: pointer;
}

.item {
    display: grid;
    border-radius: 1em;
}

.item iframe {
    grid-area: 1 / 1;
    display: block;
    width: 100%;
    object-fit: cover;
    border-radius: 1em;
}

.click-catcher {
    grid-area: 1 / 1;
    order: 1;
    color: white;
    font-size: large;
    border-bottom-left-radius: 1em;
    border-bottom-right-radius: 1em;
    background: linear-gradient(to top, rgba(138, 133, 133, 0.7), transparent);
}