/* ================================================================
   NEWPHOTO — Luxury Gallery
   Design language inspired by Louis Vuitton's editorial aesthetic:
   ivory grounds · fine serifs · gold accents · generous white-space
   ================================================================ */

/* ── TOKENS ── */
:root {
    --ivory:        #F7F3ED;
    --ivory-deep:   #EDE7DC;
    --ivory-card:   #FDFAF6;
    --black:        #0D0D0D;
    --charcoal:     #2C2C2C;
    --grey:         #7A7167;
    --grey-light:   #C4BDB3;
    --gold:         #B8975A;
    --gold-light:   #D4B483;
    --gold-pale:    #F0E6D0;
    --white:        #FFFFFF;

    --font-serif:   'Cormorant Garamond', Georgia, serif;
    --font-sans:    'Jost', 'Helvetica Neue', sans-serif;

    --header-h:     72px;
    --sidebar-w:    300px;
    --ease:         cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
    --dur:          0.35s;
}

/* ── RESET ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    background: var(--ivory);
    color: var(--charcoal);
    font-family: var(--font-sans);
    font-weight: 300;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
button { background: none; border: none; cursor: pointer; font-family: inherit; }
img { display: block; max-width: 100%; }

/* ── HEADER ── */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    background: var(--ivory);
    z-index: 200;
    transition: box-shadow var(--dur) var(--ease);
}

.site-header.scrolled {
    box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}

.header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: calc(var(--header-h) - 1px);
    padding: 0 32px;
    gap: 24px;
}

.header-left  { display: flex; align-items: center; }
.header-right { display: flex; align-items: center; justify-content: flex-end; }

/* Hamburger */
.nav-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    margin: -8px;
    color: var(--charcoal);
    transition: opacity var(--dur);
}
.nav-btn:hover { opacity: 0.55; }
.nav-btn span {
    display: block;
    width: 22px;
    height: 1px;
    background: currentColor;
    transition: transform var(--dur) var(--ease), opacity var(--dur);
}

/* Logo */
.site-logo {
    font-family: var(--font-sans);
    font-weight: 200;
    font-size: 18px;
    letter-spacing: 0.38em;
    text-transform: uppercase;
    color: var(--black);
    white-space: nowrap;
    transition: opacity var(--dur);
}
.site-logo:hover { opacity: 0.6; }

/* Gold rule under header */
.header-rule {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gold-light) 30%, var(--gold) 50%, var(--gold-light) 70%, transparent 100%);
    opacity: 0.6;
}

/* ── BREADCRUMB ── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--grey);
}
.breadcrumb a {
    transition: color var(--dur);
    cursor: pointer;
    white-space: nowrap;
}
.breadcrumb a:hover { color: var(--charcoal); }
.breadcrumb a.active { color: var(--charcoal); font-weight: 400; }
.breadcrumb .sep {
    color: var(--gold);
    font-size: 9px;
    opacity: 0.7;
}

/* ── LAYOUT ── */
.layout {
    display: flex;
    min-height: calc(100vh - var(--header-h));
    margin-top: var(--header-h);
}

/* ── SIDEBAR ── */
.sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--ivory-deep);
    border-right: 1px solid rgba(184,151,90,0.2);
    display: flex;
    flex-direction: column;
    transition: transform var(--dur) var(--ease-out);
    z-index: 100;
    overflow: hidden;
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar-head {
    padding: 36px 28px 20px;
    border-bottom: 1px solid rgba(184,151,90,0.15);
}
.sidebar-label {
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold);
}

.sidebar-tree {
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
}
.sidebar-tree::-webkit-scrollbar { width: 3px; }
.sidebar-tree::-webkit-scrollbar-thumb { background: rgba(184,151,90,0.25); border-radius: 2px; }

.sidebar-foot {
    padding: 20px 28px;
    border-top: 1px solid rgba(184,151,90,0.15);
}
.image-count {
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--grey);
}

/* Skeleton loader */
.tree-skeleton {
    padding: 20px 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.tree-skeleton span {
    display: block;
    height: 1px;
    background: rgba(184,151,90,0.2);
    animation: pulse 1.6s ease-in-out infinite alternate;
}
.tree-skeleton span:nth-child(1) { width: 60%; }
.tree-skeleton span:nth-child(2) { width: 80%; }
.tree-skeleton span:nth-child(3) { width: 45%; }

@keyframes pulse { from { opacity: 0.4; } to { opacity: 1; } }

/* ── TREE NODES ── */
.tree-item { }

.tree-node {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 28px;
    cursor: pointer;
    position: relative;
    transition: background var(--dur), color var(--dur);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--charcoal);
}
.tree-node::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 0;
    background: var(--gold);
    transition: height var(--dur) var(--ease-out);
}
.tree-node:hover { background: rgba(184,151,90,0.06); color: var(--black); }
.tree-node.active { color: var(--gold); }
.tree-node.active::before { height: 70%; }

.tree-chevron {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    color: var(--grey-light);
    transition: transform var(--dur) var(--ease);
    display: flex; align-items: center; justify-content: center;
}
.tree-chevron.open { transform: rotate(90deg); }
.tree-chevron.empty { visibility: hidden; }

.tree-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tree-count {
    font-size: 10px;
    letter-spacing: 0.05em;
    color: var(--gold);
    background: var(--gold-pale);
    padding: 1px 7px;
    border-radius: 20px;
    flex-shrink: 0;
}

.tree-children {
    display: none;
    padding-left: 20px;
}
.tree-children.open { display: block; }

/* ── MAIN ── */
.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 48px 48px 80px;
    transition: margin-left var(--dur) var(--ease-out);
    min-width: 0;
}

.main.full-width { margin-left: 0; }

/* ── SECTION TITLE ── */
.section-title {
    font-family: var(--font-serif);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 28px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(184,151,90,0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.section-title span { color: var(--grey-light); font-size: 10px; letter-spacing: 0.1em; }

/* ── FOLDER GRID ── */
.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2px;
    margin-bottom: 60px;
}

.folder-card {
    background: var(--ivory-card);
    border: 1px solid transparent;
    padding: 40px 28px;
    cursor: pointer;
    transition: border-color var(--dur), background var(--dur), transform var(--dur) var(--ease-out);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.folder-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid var(--gold);
    opacity: 0;
    transition: opacity var(--dur);
}
.folder-card:hover {
    background: var(--white);
    transform: translateY(-3px);
}
.folder-card:hover::after { opacity: 1; }

.folder-icon-wrap {
    width: 52px;
    height: 52px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(184,151,90,0.3);
    border-radius: 50%;
    color: var(--gold);
    transition: border-color var(--dur), background var(--dur);
}
.folder-card:hover .folder-icon-wrap {
    background: var(--gold-pale);
    border-color: var(--gold);
}
.folder-icon-wrap svg { width: 22px; height: 22px; }

.folder-name {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 400;
    color: var(--charcoal);
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}
.folder-count {
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--grey);
}

/* ── MASONRY GALLERY ── */
.gallery {
    columns: 4;
    column-gap: 2px;
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: 2px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: var(--ivory-deep);
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--gold);
    opacity: 0;
    transition: opacity var(--dur);
    pointer-events: none;
    z-index: 2;
}

.gallery-item:hover::after { opacity: 1; }

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0;
    transition: opacity 0.5s var(--ease), transform 0.6s var(--ease-out);
    transform: scale(1.04);
}
.gallery-item img.loaded {
    opacity: 1;
    transform: scale(1);
}
.gallery-item:hover img {
    transform: scale(1.04);
}

.img-placeholder {
    width: 100%;
    background: var(--ivory-deep);
    animation: pulse 1.8s ease-in-out infinite alternate;
}

.img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(13,13,13,0.7) 0%, transparent 55%);
    opacity: 0;
    transition: opacity var(--dur);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 20px;
    z-index: 1;
}
.gallery-item:hover .img-overlay { opacity: 1; }

.img-title {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 300;
    color: var(--white);
    letter-spacing: 0.04em;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.img-info {
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.65);
}

/* ── GALLERY STATES ── */
.gallery-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0;
    grid-column: 1/-1;
}

.lv-spinner {
    width: 32px;
    height: 32px;
    border: 1px solid rgba(184,151,90,0.3);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
    text-align: center;
    padding: 120px 40px;
}
.empty-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 28px;
    color: rgba(184,151,90,0.35);
}
.empty-state h2 {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 0.06em;
    color: var(--charcoal);
    margin-bottom: 12px;
}
.empty-state p {
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--grey);
    line-height: 2;
}

/* ── LIGHTBOX ── */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}
.lightbox.active {
    display: flex;
    animation: fadeIn 0.3s var(--ease);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.lb-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(7,6,5,0.95);
    cursor: pointer;
}

.lb-figure {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 90vw;
    max-height: 92vh;
    animation: lbIn 0.4s var(--ease-out);
}
@keyframes lbIn { from { opacity: 0; transform: scale(0.93); } to { opacity: 1; transform: scale(1); } }

.lb-image {
    max-width: 88vw;
    max-height: 80vh;
    object-fit: contain;
    user-select: none;
    -webkit-user-drag: none;
    border: 1px solid rgba(184,151,90,0.2);
}

.lb-caption {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 24px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(184,151,90,0.2);
    padding: 10px 24px;
    max-width: 88vw;
}
.lb-name {
    font-family: var(--font-serif);
    font-size: 14px;
    font-weight: 300;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.04em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}
.lb-meta {
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold);
    white-space: nowrap;
}
.lb-count {
    font-size: 10px;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.35);
    white-space: nowrap;
}

/* Lightbox buttons */
.lb-close {
    position: fixed;
    top: 28px;
    right: 32px;
    z-index: 2;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 50%;
    color: rgba(255,255,255,0.7);
    transition: border-color var(--dur), color var(--dur), background var(--dur);
}
.lb-close svg { width: 18px; height: 18px; }
.lb-close:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(184,151,90,0.1);
}

.lb-nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: 50px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.55);
    border: 1px solid rgba(255,255,255,0.08);
    transition: color var(--dur), border-color var(--dur), background var(--dur);
}
.lb-nav svg { width: 24px; height: 24px; }
.lb-nav:hover {
    color: var(--gold);
    border-color: rgba(184,151,90,0.4);
    background: rgba(184,151,90,0.06);
}
.lb-prev { left: 24px; }
.lb-next { right: 24px; }
.lb-nav:disabled, .lb-nav[style*="none"] { pointer-events: none; opacity: 0.2; }

/* ── RESPONSIVE ── */
@media (max-width: 1400px) { .gallery { columns: 3; } }
@media (max-width: 1024px) {
    .gallery { columns: 2; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); box-shadow: 12px 0 40px rgba(0,0,0,0.12); }
    .main { margin-left: 0; padding: 32px 24px 60px; }
    .folder-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}
@media (max-width: 640px) {
    :root { --header-h: 60px; }
    .header-inner { padding: 0 20px; }
    .site-logo { font-size: 14px; letter-spacing: 0.3em; }
    .gallery { columns: 2; column-gap: 1px; }
    .gallery-item { margin-bottom: 1px; }
    .main { padding: 24px 16px 60px; }
    .lb-prev { left: 8px; }
    .lb-next { right: 8px; }
    .lb-caption { padding: 8px 16px; gap: 12px; }
    .breadcrumb { display: none; }
}