/* Collections Gallery V6
 * CSS Grid layout (4-col, winner 2×2 span), hover overlays
 * with description + judge feedback, immersive lightbox.
 */

/* ── Page Section ─────────────────────────────────────── */

.chs-collections {
    padding: var(--chs-section-py) 0;
    background: var(--chs-cream);
}

.chs-collections__container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Header ───────────────────────────────────────────── */

.chs-collections__header {
    padding: 2rem 0 3rem;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.chs-collections__heading {
    font-family: var(--chs-font-heading);
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: var(--chs-weight-black);
    color: var(--chs-primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    line-height: 1;
    margin-bottom: var(--chs-space-lg);
}

.chs-collections__intro {
    color: var(--chs-primary);
    opacity: 0.7;
    font-size: 1.2rem;
    max-width: 650px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

.chs-collections__btn-gallery {
    background: var(--chs-primary);
    color: var(--chs-white);
    border: none;
    padding: 1.2rem 2.5rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    font-weight: var(--chs-weight-bold);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: var(--chs-shadow-lg);
}

.chs-collections__btn-gallery:hover {
    background: var(--chs-dark);
    transform: translateY(-3px);
    box-shadow: var(--chs-shadow-xl);
}

/* ── Filter Bar ───────────────────────────────────────── */

.chs-collections__filters {
    display: flex;
    gap: var(--chs-space-md);
    justify-content: center;
    margin-bottom: var(--chs-space-xl);
    flex-wrap: wrap;
}

.chs-collections__filter {
    max-width: 250px;
    border-color: var(--chs-border);
    font-size: 0.9375rem;
}

.chs-collections__filter:focus {
    border-color: var(--chs-primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 75, 98, 0.15);
}

/* ── Photo Grid (CSS Grid, 4-col) ─────────────────────── */

.chs-collections__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
}

/* ── Photo Card ───────────────────────────────────────── */

.chs-collections__card {
    position: relative;
    background: #fff;
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--chs-shadow);
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    aspect-ratio: 4/5;
}

.chs-collections__card--winner {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
}

.chs-collections__card:hover {
    transform: scale(1.03);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12);
    z-index: 2;
}

.chs-collections__card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    display: block;
}

.chs-collections__card:hover .chs-collections__card-img {
    transform: scale(1.08);
}

/* ── Hover Overlay ────────────────────────────────────── */

.chs-collections__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top,
        rgba(13, 31, 48, 0.95) 0%,
        rgba(13, 31, 48, 0.5) 45%,
        rgba(13, 31, 48, 0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2.5rem;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

.chs-collections__card:hover .chs-collections__overlay {
    opacity: 1;
}

.chs-collections__overlay-title {
    color: var(--chs-white);
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: var(--chs-weight-bold);
}

.chs-collections__overlay-author {
    color: var(--chs-accent);
    font-weight: var(--chs-weight-semibold);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.6rem;
}

.chs-collections__overlay-desc {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.8rem;
    font-style: italic;
    line-height: 1.5;
    margin-bottom: 0.7rem;
}

.chs-collections__overlay-feedback-wrap {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 0.6rem;
}

.chs-collections__overlay-feedback {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.78rem;
    font-style: italic;
    line-height: 1.5;
}

.chs-collections__overlay-judge {
    color: var(--chs-accent);
    font-size: 0.7rem;
    font-weight: var(--chs-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.3rem;
}

/* Winner overlay: bigger text */
.chs-collections__card--winner .chs-collections__overlay {
    padding: 3rem;
}

.chs-collections__card--winner .chs-collections__overlay-title {
    font-size: 2rem;
}

.chs-collections__card--winner .chs-collections__overlay-author {
    font-size: 1rem;
}

.chs-collections__card--winner .chs-collections__overlay-desc {
    font-size: 0.9rem;
}

.chs-collections__card--winner .chs-collections__overlay-feedback {
    font-size: 0.85rem;
}

/* ── Badges (pill shape) ──────────────────────────────── */

.chs-collections__badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    padding: 0.5rem 1.2rem;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    z-index: 5;
    border-radius: var(--chs-radius-full);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.chs-collections__badge--winner {
    background: var(--chs-accent);
    color: var(--chs-dark);
    padding: 0.7rem 1.4rem;
    font-size: 0.85rem;
    box-shadow: 0 8px 20px rgba(191, 179, 89, 0.3);
}

.chs-collections__badge--os {
    background: var(--chs-white);
    color: var(--chs-primary);
}

/* ── Load More ────────────────────────────────────────── */

.chs-collections__load-more {
    text-align: center;
    margin-top: var(--chs-space-3xl);
}

/* ── Empty State ──────────────────────────────────────── */

.chs-collections__empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--chs-text-muted);
    font-size: 1.125rem;
    padding: var(--chs-space-3xl) 0;
}

/* ══════════════════════════════════════════════════════════
 * LIGHTBOX
 * ═══════════════════════════════════════════════════════ */

.chs-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(13, 31, 48, 0.98);
    z-index: 1000;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    justify-content: center;
    align-items: center;
    user-select: none;
}

.chs-lightbox.is-active {
    display: flex;
    opacity: 1;
}

/* Container: image + info panel */
.chs-lightbox__container {
    width: 95%;
    height: 90%;
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 4rem;
    align-items: center;
    max-width: 1800px;
}

/* Image stage */
.chs-lightbox__stage {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.chs-lightbox__img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    box-shadow: 0 0 80px rgba(0, 0, 0, 0.6);
    transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1), opacity 0.4s ease;
}

/* Info panel */
.chs-lightbox__info {
    color: var(--chs-white);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    padding-left: 4rem;
    height: fit-content;
}

.chs-lightbox__meta {
    margin-bottom: 2rem;
}

.chs-lightbox__label {
    display: block;
    text-transform: uppercase;
    font-size: 0.7rem;
    color: var(--chs-accent);
    letter-spacing: 0.2em;
    margin-bottom: 0.4rem;
    font-weight: var(--chs-weight-bold);
}

.chs-lightbox__title {
    font-size: 2.4rem;
    margin-bottom: 0;
    color: var(--chs-white);
    line-height: 1.1;
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: var(--chs-weight-bold);
}

.chs-lightbox__value {
    font-size: 1.15rem;
    font-weight: 300;
    color: rgba(250, 250, 250, 0.9);
}

.chs-lightbox__value--desc {
    font-style: italic;
    font-size: 0.95rem;
    color: rgba(250, 250, 250, 0.55);
}

.chs-lightbox__value--feedback {
    font-style: italic;
    font-size: 0.95rem;
    color: rgba(250, 250, 250, 0.65);
    line-height: 1.7;
}

.chs-lightbox__value--judge {
    color: var(--chs-accent);
    font-weight: var(--chs-weight-bold);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.5rem;
}

/* Lightbox badge */
.chs-lightbox__badge {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    border-radius: var(--chs-radius-full);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 1.5rem;
}

.chs-lightbox__badge--winner {
    background: var(--chs-accent);
    color: var(--chs-dark);
}

.chs-lightbox__badge--os {
    background: rgba(255, 255, 255, 0.15);
    color: var(--chs-white);
}

/* Navigation chrome */
.chs-lightbox__nav {
    position: absolute;
    background: none;
    border: none;
    color: var(--chs-white);
    cursor: pointer;
    opacity: 0.4;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    line-height: 1;
}

.chs-lightbox__nav:hover {
    opacity: 1;
}

.chs-lightbox__close {
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    font-weight: 200;
}

.chs-lightbox__close:hover {
    transform: scale(1.15);
}

.chs-lightbox__prev {
    left: 2rem;
    font-size: 4rem;
    top: 50%;
    transform: translateY(-50%);
}

.chs-lightbox__prev:hover {
    transform: translateY(-50%) scale(1.15) translateX(-2px);
}

.chs-lightbox__next {
    right: 2rem;
    font-size: 4rem;
    top: 50%;
    transform: translateY(-50%);
}

.chs-lightbox__next:hover {
    transform: translateY(-50%) scale(1.15) translateX(2px);
}

/* Slide counter */
.chs-lightbox__counter {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--chs-white);
    font-family: "Courier New", monospace;
    letter-spacing: 0.4em;
    font-size: 0.9rem;
    opacity: 0.5;
    z-index: 1050;
}

/* Progress bar (gallery mode) */
.chs-lightbox__progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    width: 100%;
    z-index: 1050;
}

.chs-lightbox__progress-fill {
    height: 100%;
    background: var(--chs-accent);
    width: 0%;
    transition: none;
}

/* ── Gallery Mode: full-bleed image, floating info ────── */

.chs-lightbox.is-gallery-mode .chs-lightbox__container {
    grid-template-columns: 1fr;
}

.chs-lightbox.is-gallery-mode .chs-lightbox__info {
    position: absolute;
    bottom: 5rem;
    left: 5rem;
    border-left: none;
    padding: 2.5rem;
    background: rgba(13, 31, 48, 0.85);
    backdrop-filter: blur(20px);
    max-width: 500px;
    pointer-events: none;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

/* ══════════════════════════════════════════════════════════
 * RESPONSIVE
 * ═══════════════════════════════════════════════════════ */

@media (max-width: 1400px) {
    .chs-collections__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .chs-collections__card--winner {
        grid-column: span 2;
    }
}

@media (max-width: 1024px) {
    .chs-lightbox__container {
        grid-template-columns: 1fr;
    }
    .chs-lightbox__info {
        display: none;
    }
}

@media (max-width: 800px) {
    .chs-collections__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    .chs-collections__card--winner {
        grid-column: span 2;
    }
    .chs-collections__container {
        padding: 0 1rem;
    }
}

@media (max-width: 575.98px) {
    .chs-collections__grid {
        grid-template-columns: 1fr;
    }
    .chs-collections__card--winner {
        grid-column: span 1;
    }
    .chs-lightbox__prev,
    .chs-lightbox__next {
        display: none;
    }
    .chs-collections__filters {
        flex-direction: column;
        align-items: center;
    }
    .chs-collections__filter {
        max-width: 100%;
        width: 100%;
    }
}