/* certificates */
.certificates-box {
    border-radius: 4rem;
}
.certificates .certificates-title {
    font-size: 4rem;
    line-height: 1.1;
}

/* the global .swiper-slide rule has border and min-height, so reset it here */
.certificates-swiper .swiper-slide {
    border: none;
    border-radius: 0;
    padding: 0;
    min-height: 0;
    height: auto;
}
.cert-card {
    border-radius: 1.5rem;
    overflow: hidden;
    aspect-ratio: 3 / 4;
}

/* arrows */
.cert-btn {
    width: 2rem;
    height: 2rem;
    border: none;
    border-radius: 50%;
    background-color: var(--main);
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .7rem;
    transition: background-color .3s ease;
}
.cert-btn:hover {
    background-color: var(--second);
}
.cert-btn.swiper-button-disabled {
    opacity: .5;
    cursor: default;
}

/* dots */
.certificates-pagination {
    position: static;          /* so Swiper does not place it absolutely */
    width: auto;
    display: flex;
    align-items: center;
    gap: .3rem;
}
.certificates-pagination .swiper-pagination-bullet {
    width: .4rem;
    height: .4rem;
    margin: 0 !important;
    background: var(--sec-text);
    opacity: .35;
    transition: all .3s ease;
}
.certificates-pagination .swiper-pagination-bullet-active {
    background: var(--main);
    opacity: 1;
    width: .8rem;
    border-radius: 1rem;
}
/* card as a button */
.cert-card {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    cursor: zoom-in;
}

/* zoom icon on hover */
.cert-zoom {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background-color: rgba(2, 54, 90, .45);
    opacity: 0;
    transition: opacity .3s ease;
}
.cert-zoom i {
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--white);
    color: var(--main);
    font-size: 1.1rem;
    transform: scale(.8);
    transition: transform .3s ease;
}
.cert-card:hover .cert-zoom,
.cert-card:focus-visible .cert-zoom {
    opacity: 1;
}
.cert-card:hover .cert-zoom i,
.cert-card:focus-visible .cert-zoom i {
    transform: scale(1);
}

/* touch screens have no hover: show a small icon in the corner instead */
@media (hover: none) {
    .cert-zoom {
        inset: auto .75rem .75rem auto;
        width: 2.2rem;
        height: 2.2rem;
        border-radius: 50%;
        background-color: var(--white);
        opacity: .95;
    }
    .cert-zoom i {
        width: auto;
        height: auto;
        background: none;
        font-size: .9rem;
        transform: none;
    }
}

/* modal */
.cert-modal .modal-dialog {
    max-width: min(95vw, 1000px);        /* grows for landscape certificates, stays narrow for portrait */
}
.cert-modal .modal-content {
    position: relative;
    padding: .75rem .75rem 1rem;
    border: 0;
    border-radius: 2rem;
    background-color: var(--white);
}
.cert-modal-body {
    display: flex;
    justify-content: center;
    border-radius: 1.4rem;
    background-color: var(--text-bg);
    overflow: hidden;
}
.cert-modal-img {
    display: block;
    max-width: 100%;
    max-height: 78vh;                    /* always fits the screen without scrolling */
    object-fit: contain;
}
.cert-modal-close {
    position: absolute;
    top: -.9rem;
    inset-inline-end: -.9rem;
    z-index: 5;
    width: 2.4rem;
    height: 2.4rem;
    padding: 0;
    border-radius: 50%;
    background-color: var(--white);
    background-size: .8rem;
    opacity: 1;
    box-shadow: 0 .25rem 1rem rgba(2, 54, 90, .25);
}
.cert-modal-close:hover {
    background-color: var(--bg);
}
.modal-backdrop.show {
    opacity: .75;
}

@media (max-width: 576px) {
    .cert-modal .modal-dialog {
        margin-inline: .75rem;
    }
    .cert-modal-close {
        top: -.6rem;
        inset-inline-end: -.3rem;
    }
}