/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Rick Proctor - Scattered Editorial Portfolio Theme
   PHP-calculated positions, JS-controlled lightbox, preview thumbnails
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS Custom Properties
   ───────────────────────────────────────────────────────────────────────────── */
:root {
    --rp-bg: #000;
    --rp-text: #f5f5f5;
    --rp-text-muted: #666;
    --rp-accent: #fff;
    --rp-gallery-bg: #fff;

    --rp-padding-x: clamp(1rem, 5vw, 5rem);
    --rp-padding-y: clamp(2.5rem, 8vw, 6.25rem);

    --rp-hover-opacity: 0.8;
    --rp-header-size: clamp(0.75rem, 1.2vw, 1rem);
    --rp-header-spacing: 0.08em;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Base
   ───────────────────────────────────────────────────────────────────────────── */
body {
    background: var(--rp-bg);
    color: var(--rp-text);
}

body::before {
    display: none;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Header
   ───────────────────────────────────────────────────────────────────────────── */
.site-header {
    background: linear-gradient(to bottom, var(--rp-bg) 80%, transparent);
    border-bottom: none;
    padding: clamp(1.25rem, 4vw, 2.5rem) var(--rp-padding-x);
    z-index: 100;
    position: relative;
}

.site-header .header-content {
    max-width: none;
}

.site-header .header-title,
.site-header .header-nav a {
    color: var(--rp-text);
    font-size: var(--rp-header-size);
    letter-spacing: var(--rp-header-spacing);
    text-transform: uppercase;
    font-weight: 400;
}

.site-header .header-nav a:hover {
    opacity: var(--rp-hover-opacity);
}

.site-header .header-nav a:focus-visible {
    outline: 2px solid var(--rp-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

.site-header .header-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.site-header .header-logo:hover {
    opacity: var(--rp-hover-opacity);
}

.site-header .header-icon {
    border-radius: 50%;
}

.site-header .header-logo .header-title {
    font-size: var(--rp-header-size);
    font-weight: 400;
    color: var(--rp-text);
    letter-spacing: var(--rp-header-spacing);
    text-transform: uppercase;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Gallery Canvas - Scattered Editorial Layout
   Container uses padding-bottom % for height (proportional to width)
   ───────────────────────────────────────────────────────────────────────────── */
.gallery-canvas {
    position: relative;
    width: 100%;
    background: var(--rp-gallery-bg);
    overflow: hidden;
    padding-bottom: var(--dh);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Gallery Items - Absolutely positioned by PHP
   ───────────────────────────────────────────────────────────────────────────── */
.gallery-item {
    position: absolute;
    margin: 0;
    left: var(--dx);
    top: var(--dy);
    width: var(--dw);
}

.gallery-item a {
    display: block;
    line-height: 0;
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    transition: opacity 0.4s ease, transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item:hover img {
    opacity: var(--rp-hover-opacity);
    transform: scale(1.02);
}

.gallery-item a:focus-visible {
    outline: 3px solid var(--rp-accent);
    outline-offset: 2px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Lightbox - JS-controlled overlay
   ───────────────────────────────────────────────────────────────────────────── */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgb(0 0 0 / 0.94);
    cursor: default;
    -webkit-tap-highlight-color: transparent;
}

.lightbox-img {
    max-width: 88dvw;
    max-height: 88dvh;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    z-index: 2;
    position: relative;
    pointer-events: none;
}

/* Fallback for browsers without dvh/dvw support */
@supports not (max-height: 1dvh) {
    .lightbox-img {
        max-width: 88vw;
        max-height: 88vh;
    }
}

/* Close button */
.lightbox-close {
    position: absolute;
    top: clamp(1rem, 3vw, 2rem);
    right: clamp(1rem, 3vw, 2rem);
    z-index: 4;
    background: none;
    border: none;
    color: #fff;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.25s ease;
    padding: 0.5rem;
    line-height: 1;
    -webkit-tap-highlight-color: transparent;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
    opacity: 1;
}

.lightbox-close:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 4px;
}

/* Prev / Next arrows */
.lightbox-nav {
    position: absolute;
    top: 0;
    bottom: 0;
    width: clamp(3.125rem, 8vw, 6.25rem);
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: #fff;
    font-size: clamp(2rem, 4vw, 3.5rem);
    cursor: pointer;
    opacity: 0.35;
    transition: opacity 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.lightbox-nav:hover {
    opacity: 1;
}

.lightbox-nav:focus-visible {
    opacity: 1;
    outline: 2px solid #fff;
    outline-offset: -4px;
}

.lightbox-prev { left: 0; }
.lightbox-next { right: 0; }

/* ─────────────────────────────────────────────────────────────────────────────
   Scroll-driven reveal (modern browsers)
   ───────────────────────────────────────────────────────────────────────────── */
@supports (animation-timeline: view()) {
    .gallery-item {
        animation: galleryReveal linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 25%;
    }

    @keyframes galleryReveal {
        from { opacity: 0; transform: scale(0.96); }
        to   { opacity: 1; transform: scale(1); }
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Reduced motion: respect user preferences
   ───────────────────────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .gallery-item,
    .gallery-item img,
    .lightbox,
    .lightbox-nav {
        transition: none;
        animation: none;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────────────────────── */
.footer {
    background: transparent;
    border-top: none;
    color: var(--rp-text-muted);
    padding: var(--rp-padding-y) var(--rp-padding-x);
}

.footer a {
    color: var(--rp-text-muted);
    font-size: var(--rp-header-size);
    letter-spacing: var(--rp-header-spacing);
    text-transform: uppercase;
    transition: opacity 0.3s ease;
}

.footer a:hover {
    opacity: var(--rp-hover-opacity);
}

.footer-content {
    max-width: none;
}

.footer-copyright {
    font-size: var(--rp-header-size);
    letter-spacing: var(--rp-header-spacing);
    text-transform: uppercase;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Mobile - Stack layout (scattered doesn't work at narrow widths)
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 48rem) {
    .gallery-canvas {
        padding-bottom: var(--mh);
    }

    .gallery-item {
        left: var(--mx);
        top: var(--my);
        width: var(--mw);
    }

    .site-header {
        padding: 1rem 1.25rem;
    }

    .lightbox-nav {
        width: 2.75rem;
        font-size: 1.8rem;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Print
   ───────────────────────────────────────────────────────────────────────────── */
@media print {
    .gallery-canvas {
        padding-bottom: 0 !important;
        display: block;
        background: #fff;
    }

    .gallery-item {
        position: static !important;
        width: 45% !important;
        display: inline-block;
        page-break-inside: avoid;
    }

    .lightbox { display: none !important; }
}