/* Certificates: the page /about/diplomas/, the strip under «Про мене» and the lightbox. */

.diplomas__intro { max-width: 60ch; margin-top: 1rem; }
.diplomas__group { margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem); }
.diplomas__group-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 1.3rem + .8vw, 2rem);
    color: var(--accent-strong);
}
.diplomas__lead { margin: .35rem 0 1.5rem; }
.diplomas__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: clamp(1rem, .6rem + 1.5vw, 1.75rem);
    align-items: start;
}

.diploma {
    display: flex;
    flex-direction: column;
    gap: .6rem;
    color: inherit;
    text-decoration: none;
}
.diploma__frame {
    position: relative;
    display: block;
    overflow: hidden;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
}
.diploma__frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
.diploma__zoom {
    position: absolute;
    right: .6rem;
    bottom: .6rem;
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: var(--surface);
    color: var(--accent-strong);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: scale(.85);
    transition: opacity .25s ease, transform .25s ease;
}
.diploma:hover .diploma__frame,
.diploma:focus-visible .diploma__frame { transform: translateY(-3px); box-shadow: var(--shadow); }
.diploma:hover .diploma__zoom,
.diploma:focus-visible .diploma__zoom { opacity: 1; transform: none; }
@media (hover: none) { .diploma__zoom { opacity: 1; transform: none; } }
.diploma__title { font-weight: 600; line-height: 1.35; color: var(--ink); }
.diploma__meta { font-size: .9rem; color: var(--muted); }

/* the carousel on the main page */
.about__diplomas { margin-top: 2.5rem; min-width: 0; }
.about__diplomas-title { margin-bottom: 1rem; font-size: 1.15rem; color: var(--accent-strong); }
.carousel { position: relative; margin-bottom: 1.25rem; }
.carousel__track {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    overflow-x: auto;
    padding: .25rem .25rem 1rem;
    margin-inline: -.25rem;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--sage-300) transparent;
}
.carousel__track > .diploma { flex: 0 0 min(230px, 70%); scroll-snap-align: start; }
.carousel .diploma__title,
.carousel .diploma__meta {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
}
.carousel .diploma__frame { aspect-ratio: 4 / 3 !important; background: #fff; }
.carousel .diploma__frame img { object-fit: contain; }
.carousel__btn {
    position: absolute;
    top: calc(50% - 2.5rem);
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--surface);
    color: var(--accent-strong);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: opacity .25s ease, background .2s ease;
}
.carousel__btn:hover { background: #fff; }
.carousel__btn[disabled] { opacity: 0; pointer-events: none; }
.carousel__btn--prev { left: -1rem; }
.carousel__btn--next { right: -1rem; }
@media (hover: none) { .carousel__btn { display: none; } }
@media (prefers-reduced-motion: reduce) { .carousel__track { scroll-behavior: auto; } }

/* the lightbox */
.lightbox {
    width: 100vw;
    max-width: none;
    height: 100dvh;
    max-height: none;
    margin: 0;
    padding: 0;
    border: 0;
    background: rgba(20, 28, 20, .92);
    color: #fff;
}
.lightbox[open] { display: grid; place-items: center; animation: lightbox-in .25s ease; }
.lightbox::backdrop { background: transparent; }
@keyframes lightbox-in { from { opacity: 0; } }
.lightbox__figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .75rem;
    max-width: 100%;
    max-height: 100%;
    margin: 0;
    padding: 4rem 1rem 1rem;
}
.lightbox__img {
    max-width: min(100%, 1400px);
    max-height: calc(100dvh - 9rem);
    object-fit: contain;
    border-radius: 6px;
    background: #fff;
}
.lightbox__caption { display: flex; flex-direction: column; gap: .15rem; max-width: 70ch; text-align: center; font-size: .9rem; }
.lightbox__caption span { opacity: .75; }
.lightbox__btn {
    position: absolute;
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, .14);
    color: #fff;
    cursor: pointer;
    transition: background .2s ease;
}
.lightbox__btn:hover { background: rgba(255, 255, 255, .28); }
.lightbox__close { top: 1rem; right: 1rem; }
.lightbox__prev,
.lightbox__next { top: 50%; translate: 0 -50%; }
.lightbox__prev { left: .75rem; }
.lightbox__next { right: .75rem; }
@media (max-width: 640px) {
    .lightbox__prev,
    .lightbox__next { top: auto; bottom: 1rem; translate: none; }
    .lightbox__img { max-height: calc(100dvh - 11rem); }
}
@media (prefers-reduced-motion: reduce) {
    .lightbox[open] { animation: none; }
    .diploma__frame, .diploma__zoom { transition: none; }
}