/**
 * Heavy Metal Brothers Gallery — CSS
 * Aesthetic: Industrial Black Metal / Brutalist Dark
 * Fonts: Metal Mania (Google) + Share Tech Mono
 * Version: 1.0.0
 */

@import url('https://fonts.googleapis.com/css2?family=Metal+Mania&family=Share+Tech+Mono&family=Cinzel:wght@400;700;900&display=swap');

/* ─────────────────────────────────────────────────────────────────────────────
   CSS CUSTOM PROPERTIES
───────────────────────────────────────────────────────────────────────────── */
:root {
    --hmg-black:       #000000;
    --hmg-dark:        #0a0a0a;
    --hmg-dark2:       #111111;
    --hmg-dark3:       #1a1a1a;
    --hmg-dark4:       #222222;
    --hmg-red:         #cc0000;
    --hmg-red-bright:  #ff2200;
    --hmg-red-glow:    rgba(204,0,0,0.6);
    --hmg-orange:      #ff6600;
    --hmg-gold:        #c8a000;
    --hmg-silver:      #aaaaaa;
    --hmg-text:        #cccccc;
    --hmg-text-dim:    #777777;
    --hmg-border:      #2a2a2a;
    --hmg-border-red:  #550000;
    --hmg-font-metal:  'Metal Mania', cursive;
    --hmg-font-mono:   'Share Tech Mono', monospace;
    --hmg-font-cinzel: 'Cinzel', serif;
    --hmg-shadow-red:  0 0 20px rgba(204,0,0,0.4), 0 0 40px rgba(204,0,0,0.2);
    --hmg-transition:  all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─────────────────────────────────────────────────────────────────────────────
   WRAPPER & RESET
───────────────────────────────────────────────────────────────────────────── */
.hmg-wrapper {
    background: var(--hmg-black);
    color: var(--hmg-text);
    font-family: var(--hmg-font-mono);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Noise texture overlay */
.hmg-wrapper::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.hmg-wrapper > * {
    position: relative;
    z-index: 1;
}

/* ─────────────────────────────────────────────────────────────────────────────
   HEADER
───────────────────────────────────────────────────────────────────────────── */
.hmg-header {
    text-align: center;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(180deg, #110000 0%, var(--hmg-black) 100%);
    border-bottom: 1px solid var(--hmg-border-red);
    box-shadow: 0 4px 30px rgba(204,0,0,0.15);
    position: relative;
}

.hmg-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--hmg-red), transparent);
}

.hmg-header__skull {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 12px var(--hmg-red));
    animation: hmg-skull-pulse 3s ease-in-out infinite;
}

@keyframes hmg-skull-pulse {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 12px var(--hmg-red)); }
    50%       { transform: scale(1.08); filter: drop-shadow(0 0 20px var(--hmg-red-bright)); }
}

.hmg-header__title {
    font-family: var(--hmg-font-metal);
    font-size: clamp(2rem, 6vw, 4.5rem);
    color: var(--hmg-red);
    text-shadow: var(--hmg-shadow-red);
    margin: 0 0 0.5rem;
    letter-spacing: 0.05em;
    line-height: 1.1;
}

.hmg-header__prefix {
    color: var(--hmg-gold);
    font-size: 0.6em;
    vertical-align: middle;
}

.hmg-header__tagline {
    font-family: var(--hmg-font-cinzel);
    color: var(--hmg-text-dim);
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hmg-header__divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.hmg-header__flame {
    font-size: 1.2rem;
    animation: hmg-flicker 1.5s ease-in-out infinite;
}

.hmg-header__flame:nth-child(2) { animation-delay: 0.3s; }
.hmg-header__flame:nth-child(3) { animation-delay: 0.6s; }

@keyframes hmg-flicker {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50%       { opacity: 0.7; transform: scaleY(0.9); }
}

/* ─────────────────────────────────────────────────────────────────────────────
   BREADCRUMB
───────────────────────────────────────────────────────────────────────────── */
.hmg-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.3rem;
    padding: 0.75rem 2rem;
    background: var(--hmg-dark2);
    border-bottom: 1px solid var(--hmg-border);
    font-size: 0.85rem;
}

.hmg-breadcrumb__link {
    color: var(--hmg-red);
    text-decoration: none;
    transition: var(--hmg-transition);
}

.hmg-breadcrumb__link:hover {
    color: var(--hmg-red-bright);
    text-shadow: 0 0 8px var(--hmg-red-glow);
}

.hmg-breadcrumb__sep {
    color: var(--hmg-text-dim);
    font-size: 0.7rem;
}

.hmg-breadcrumb__current {
    color: var(--hmg-text);
    font-family: var(--hmg-font-cinzel);
}

/* ─────────────────────────────────────────────────────────────────────────────
   MAIN LAYOUT
───────────────────────────────────────────────────────────────────────────── */
.hmg-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ALBUMS ROOT GRID
───────────────────────────────────────────────────────────────────────────── */
.hmg-albums-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.hmg-album-card {
    background: var(--hmg-dark2);
    border: 1px solid var(--hmg-border);
    border-top: 3px solid var(--hmg-red);
    transition: var(--hmg-transition);
    position: relative;
    overflow: hidden;
}

.hmg-album-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 60%, rgba(204,0,0,0.05) 100%);
    pointer-events: none;
}

.hmg-album-card:hover {
    border-color: var(--hmg-red);
    box-shadow: 0 0 20px var(--hmg-red-glow), 0 8px 32px rgba(0,0,0,0.8);
    transform: translateY(-4px);
}

.hmg-album-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.hmg-album-card__cover {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
    background: var(--hmg-dark3);
}

.hmg-album-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    filter: grayscale(20%) contrast(1.1);
}

.hmg-album-card:hover .hmg-album-card__img {
    transform: scale(1.06);
    filter: grayscale(0%) contrast(1.2);
}

.hmg-album-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--hmg-border-red);
    background: repeating-linear-gradient(
        45deg,
        var(--hmg-dark3),
        var(--hmg-dark3) 10px,
        var(--hmg-dark4) 10px,
        var(--hmg-dark4) 20px
    );
}

.hmg-album-card__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hmg-album-card:hover .hmg-album-card__overlay {
    opacity: 1;
}

.hmg-album-card__enter {
    font-family: var(--hmg-font-metal);
    color: var(--hmg-red);
    font-size: 1.1rem;
    letter-spacing: 0.15em;
    text-shadow: var(--hmg-shadow-red);
    border: 1px solid var(--hmg-red);
    padding: 0.5rem 1.2rem;
    background: rgba(0,0,0,0.8);
}

.hmg-album-card__info {
    padding: 1rem 1.2rem;
}

.hmg-album-card__title {
    font-family: var(--hmg-font-cinzel);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--hmg-text);
    margin: 0 0 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hmg-album-card:hover .hmg-album-card__title {
    color: var(--hmg-red);
}

.hmg-album-card__desc {
    font-size: 0.8rem;
    color: var(--hmg-text-dim);
    margin: 0 0 0.6rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hmg-album-card__meta {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--hmg-text-dim);
}

/* ─────────────────────────────────────────────────────────────────────────────
   ALBUM DESCRIPTION
───────────────────────────────────────────────────────────────────────────── */
.hmg-album-desc {
    background: var(--hmg-dark2);
    border-left: 3px solid var(--hmg-red);
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--hmg-silver);
}

/* ─────────────────────────────────────────────────────────────────────────────
   SUB-ALBUMS
───────────────────────────────────────────────────────────────────────────── */
.hmg-subalbums {
    margin-bottom: 2rem;
}

.hmg-section-title {
    font-family: var(--hmg-font-cinzel);
    font-size: 1rem;
    color: var(--hmg-red);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hmg-section-title__icon {
    font-size: 1.2rem;
}

.hmg-subalbums-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.hmg-subalbum-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 1rem;
    background: var(--hmg-dark3);
    border: 1px solid var(--hmg-border-red);
    color: var(--hmg-text);
    text-decoration: none;
    font-size: 0.85rem;
    font-family: var(--hmg-font-cinzel);
    transition: var(--hmg-transition);
}

.hmg-subalbum-chip:hover {
    background: var(--hmg-border-red);
    border-color: var(--hmg-red);
    color: var(--hmg-red-bright);
    box-shadow: 0 0 10px var(--hmg-red-glow);
    transform: translateY(-2px);
}

/* ─────────────────────────────────────────────────────────────────────────────
   GALLERY TOOLBAR
───────────────────────────────────────────────────────────────────────────── */
.hmg-gallery-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding: 0.6rem 1rem;
    background: var(--hmg-dark2);
    border: 1px solid var(--hmg-border);
}

.hmg-gallery-toolbar__count {
    font-family: var(--hmg-font-cinzel);
    color: var(--hmg-text-dim);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

.hmg-gallery-toolbar__controls {
    display: flex;
    gap: 0.4rem;
}

.hmg-btn {
    background: var(--hmg-dark3);
    border: 1px solid var(--hmg-border);
    color: var(--hmg-text-dim);
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--hmg-transition);
    line-height: 1;
}

.hmg-btn:hover,
.hmg-btn--active {
    background: var(--hmg-dark4);
    border-color: var(--hmg-red);
    color: var(--hmg-red);
}

/* ─────────────────────────────────────────────────────────────────────────────
   IMAGE GALLERY — GRID MODE
───────────────────────────────────────────────────────────────────────────── */
.hmg-gallery {
    display: grid;
    gap: 1rem;
}

.hmg-gallery--grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.hmg-gallery--masonry {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    grid-auto-rows: 10px;
}

.hmg-photo {
    margin: 0;
    position: relative;
    background: var(--hmg-dark2);
    overflow: hidden;
    border: 1px solid var(--hmg-border);
    transition: var(--hmg-transition);
}

.hmg-photo:hover {
    border-color: var(--hmg-red);
    box-shadow: 0 0 15px var(--hmg-red-glow);
    z-index: 2;
}

.hmg-photo__link {
    display: block;
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.hmg-gallery--masonry .hmg-photo__link {
    aspect-ratio: unset;
}

.hmg-photo__thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease, filter 0.3s ease;
    filter: grayscale(15%) contrast(1.05);
}

.hmg-photo:hover .hmg-photo__thumb {
    transform: scale(1.05);
    filter: grayscale(0%) contrast(1.15) brightness(0.9);
}

.hmg-photo__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(204,0,0,0.2), rgba(0,0,0,0.7));
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.hmg-photo:hover .hmg-photo__overlay {
    opacity: 1;
}

.hmg-photo__overlay-icon {
    font-size: 2.5rem;
    color: white;
    text-shadow: 0 0 20px var(--hmg-red);
    font-weight: bold;
}

.hmg-photo__caption {
    padding: 0.5rem 0.7rem;
    font-size: 0.75rem;
    color: var(--hmg-text-dim);
    font-family: var(--hmg-font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background: var(--hmg-dark2);
    border-top: 1px solid var(--hmg-border);
}

/* ─────────────────────────────────────────────────────────────────────────────
   LIGHTBOX
───────────────────────────────────────────────────────────────────────────── */
.hmg-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
}

.hmg-lightbox[hidden] {
    display: none;
}

.hmg-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    cursor: pointer;
}

.hmg-lightbox__container {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    pointer-events: none;
}

.hmg-lightbox__container > * {
    pointer-events: auto;
}

.hmg-lightbox__img-wrap {
    position: relative;
    max-width: calc(100vw - 8rem);
    max-height: calc(100vh - 8rem);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hmg-lightbox__img {
    max-width: 100%;
    max-height: calc(100vh - 8rem);
    object-fit: contain;
    box-shadow:
        0 0 0 1px var(--hmg-border-red),
        0 0 40px rgba(204,0,0,0.4),
        0 20px 80px rgba(0,0,0,0.9);
    transition: opacity 0.3s ease;
}

.hmg-lightbox__img.hmg-loading {
    opacity: 0.2;
}

.hmg-lightbox__loader {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
}

.hmg-lightbox__loader.hmg-visible {
    display: flex;
}

.hmg-spinner {
    color: var(--hmg-red);
    font-size: 1.5rem;
    letter-spacing: 0.3em;
    animation: hmg-spin 1s steps(4, end) infinite;
}

@keyframes hmg-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.hmg-lightbox__close {
    position: fixed;
    top: 1rem;
    right: 1.5rem;
    background: none;
    border: 1px solid var(--hmg-red);
    color: var(--hmg-red);
    font-size: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    transition: var(--hmg-transition);
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hmg-lightbox__close:hover {
    background: var(--hmg-red);
    color: white;
    box-shadow: 0 0 15px var(--hmg-red-glow);
}

.hmg-lightbox__nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.7);
    border: 1px solid var(--hmg-border-red);
    color: var(--hmg-red);
    font-size: 1.8rem;
    padding: 0.8rem 0.6rem;
    cursor: pointer;
    transition: var(--hmg-transition);
    line-height: 1;
}

.hmg-lightbox__nav:hover {
    background: rgba(204,0,0,0.2);
    border-color: var(--hmg-red);
    box-shadow: 0 0 15px var(--hmg-red-glow);
}

.hmg-lightbox__nav--prev { left: 0.5rem; }
.hmg-lightbox__nav--next { right: 0.5rem; }

.hmg-lightbox__caption {
    margin-top: 1rem;
    font-family: var(--hmg-font-cinzel);
    color: var(--hmg-silver);
    font-size: 0.9rem;
    text-align: center;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(255,255,255,0.3);
}

.hmg-lightbox__counter {
    margin-top: 0.3rem;
    font-family: var(--hmg-font-mono);
    color: var(--hmg-text-dim);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

/* ─────────────────────────────────────────────────────────────────────────────
   BACK BUTTON
───────────────────────────────────────────────────────────────────────────── */
.hmg-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 0.6rem 1.4rem;
    background: transparent;
    border: 1px solid var(--hmg-border-red);
    color: var(--hmg-red);
    text-decoration: none;
    font-family: var(--hmg-font-cinzel);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: var(--hmg-transition);
}

.hmg-back-btn:hover {
    background: var(--hmg-border-red);
    border-color: var(--hmg-red);
    color: var(--hmg-red-bright);
    box-shadow: 0 0 15px var(--hmg-red-glow);
}

/* ─────────────────────────────────────────────────────────────────────────────
   EMPTY STATE
───────────────────────────────────────────────────────────────────────────── */
.hmg-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--hmg-text-dim);
}

.hmg-empty__icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
    opacity: 0.3;
    filter: drop-shadow(0 0 8px var(--hmg-red));
}

/* ─────────────────────────────────────────────────────────────────────────────
   LAZY-LOAD ANIMATION
───────────────────────────────────────────────────────────────────────────── */
.hmg-photo {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease, border-color 0.3s, box-shadow 0.3s;
}

.hmg-photo.hmg-revealed {
    opacity: 1;
    transform: translateY(0);
}

.hmg-album-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease, border-color 0.3s, box-shadow 0.3s;
}

.hmg-album-card.hmg-revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .hmg-header {
        padding: 2rem 1rem 1.5rem;
    }

    .hmg-albums-grid {
        grid-template-columns: 1fr;
    }

    .hmg-gallery--grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .hmg-lightbox__nav--prev { left: 0; }
    .hmg-lightbox__nav--next { right: 0; }

    .hmg-lightbox__container { padding: 1rem; }
    .hmg-lightbox__img-wrap {
        max-width: calc(100vw - 6rem);
    }
}

@media (max-width: 480px) {
    .hmg-gallery--grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   SCROLLBAR STYLING
───────────────────────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--hmg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--hmg-border-red);
    border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--hmg-red);
}

/* ─────────────────────────────────────────────────────────────────────────────
   SELECTION COLOR
───────────────────────────────────────────────────────────────────────────── */
::selection {
    background: var(--hmg-red);
    color: white;
}