:root {
    --bg-color: #0d0d0d;
    --text-color: #e0e0e0;
    --accent-red: #d32f2f;
    --accent-gold: #c5a16f;
    --muted-color: #888888;
    --card-bg: rgba(255, 255, 255, 0.05);
    --transition-speed: 0.3s;
    --font-primary: 'Outfit', 'Noto Sans JP', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

#loading-overlay.loaded {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.torii-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: glow 1.5s infinite alternate;
}

.loader-text {
    letter-spacing: 0.2rem;
    font-weight: 300;
    font-size: 0.8rem;
    color: var(--accent-red);
}

@keyframes glow {
    from { color: #fff; text-shadow: 0 0 5px #fff, 0 0 10px #fff; }
    to { color: var(--accent-red); text-shadow: 0 0 10px var(--accent-red), 0 0 20px var(--accent-red); }
}

/* Header */
header {
    padding: 40px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1rem;
    color: #fff;
    text-transform: uppercase;
}

.subtitle {
    color: var(--accent-red);
    font-weight: 300;
    margin-left: 10px;
    font-size: 1rem;
}

.nav-link {
    color: var(--muted-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #fff;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.album-info {
    margin-bottom: 40px;
    text-align: center;
}

.album-info h2 {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 10px;
    letter-spacing: 0.2rem;
}

.gallery-count {
    font-size: 0.8rem;
    color: var(--muted-color);
}

/* Image Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin-bottom: 80px;
}

.gallery-card {
    position: relative;
    aspect-ratio: 1;
    background: var(--card-bg);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.gallery-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-red);
}

.gallery-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0; /* Fade in via JS */
    transition: opacity 0.5s ease;
}

.gallery-card img.loaded {
    opacity: 1;
}

/* Lightbox Overlay */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
}

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

.lightbox-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lightbox-content img.loaded {
    opacity: 1;
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 30px;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    z-index: 1010;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.3s;
}

.lightbox-close:hover {
    background: var(--accent-red);
}

/* Loader for lightbox */
.lightbox-loader {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--accent-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

.lightbox-content.loading .lightbox-loader {
    display: block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer */
footer {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted-color);
    font-size: 0.8rem;
    letter-spacing: 0.1rem;
    text-transform: uppercase;
}