/* ========================================================================
   Samples / Image Gallery page
   ======================================================================== */

.sample-group {
    margin-bottom: 56px;
}

.sample-group-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 22px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
}

.sample-group-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--panelink);
    margin: 0;
}

.sample-group-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .9rem;
    font-weight: 600;
    color: var(--btn);
    background: rgba(14, 165, 233, .1);
    border: 1px solid rgba(14, 165, 233, .25);
    padding: 6px 14px;
    border-radius: 999px;
}

.sample-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.sample-card {
    position: relative;
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    padding: 0;
    border: none;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    background: #0b1220;
    box-shadow: 0 12px 30px rgba(0, 0, 0, .18);
    transition: transform .25s ease, box-shadow .25s ease;
}

.sample-card:hover,
.sample-card:focus-visible {
    transform: translateY(-4px);
    box-shadow: 0 22px 50px rgba(0, 0, 0, .28);
    outline: none;
}

.sample-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .4s ease;
}

.sample-card:hover img,
.sample-card:focus-visible img {
    transform: scale(1.06);
}

.sample-card-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to top, rgba(11, 18, 32, .55), rgba(11, 18, 32, 0) 55%);
    opacity: 0;
    transition: opacity .25s ease;
}

.sample-card:hover .sample-card-overlay,
.sample-card:focus-visible .sample-card-overlay {
    opacity: 1;
}

.sample-card-zoom {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, .92);
    color: var(--panelink);
    font-size: 1.4rem;
    font-weight: 700;
    transform: scale(.85);
    transition: transform .25s ease;
}

.sample-card:hover .sample-card-zoom,
.sample-card:focus-visible .sample-card-zoom {
    transform: scale(1);
}

/* ========================================================================
   Lightbox
   ======================================================================== */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(4, 8, 16, .92);
    backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}

.lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.lightbox-figure {
    margin: 0;
    max-width: 90vw;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.lightbox-figure img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .6);
}

.lightbox-caption {
    color: #e5e7eb;
    font-size: .95rem;
    font-weight: 500;
    text-align: center;
}

.lightbox-close,
.lightbox-nav {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    color: #fff;
    background: rgba(255, 255, 255, .1);
    border-radius: 50%;
    transition: background .2s ease, transform .2s ease;
}

.lightbox-close:hover,
.lightbox-nav:hover {
    background: rgba(255, 255, 255, .22);
}

.lightbox-close {
    top: 22px;
    right: 26px;
    width: 48px;
    height: 48px;
    font-size: 2rem;
    line-height: 1;
}

.lightbox-nav {
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    font-size: 2.4rem;
    line-height: 1;
}

.lightbox-nav:hover {
    transform: translateY(-50%) scale(1.08);
}

.lightbox-prev {
    left: 26px;
}

.lightbox-next {
    right: 26px;
}

@media (max-width: 768px) {
    .sample-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 14px;
    }

    .sample-group-title {
        font-size: 1.3rem;
    }

    .lightbox {
        padding: 16px;
    }

    .lightbox-close {
        top: 12px;
        right: 14px;
    }

    .lightbox-nav {
        width: 46px;
        height: 46px;
        font-size: 2rem;
    }

    .lightbox-prev {
        left: 10px;
    }

    .lightbox-next {
        right: 10px;
    }
}