:root {
    --bg-color: #050505;
    --card-bg: #0a0a0a;
    --text-color: #e0e0e0;
    --text-muted: #888888;
    --accent-color: #ffffff;
    --border-color: rgba(255, 255, 255, 0.08);
    --font-heading: 'Neue Montreal', 'Montserrat', sans-serif;
    --font-body: 'Montserrat', sans-serif;
    --spacing-unit: 2rem;
    --container-width: 1400px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    overflow-x: hidden;
    overflow-y: auto;
    width: 100vw;
    min-height: 100vh;
    line-height: 1.6;
}

/* UI Layer */
#ui-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-unit);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: linear-gradient(to bottom, rgba(5, 5, 5, 0.9) 0%, rgba(5, 5, 5, 0) 100%);
    pointer-events: none;
}

#ui-layer>* {
    pointer-events: auto;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 500;
    letter-spacing: 0.15em;
    font-size: 1rem;
    color: var(--accent-color);
    text-transform: uppercase;
}

/* 2D Gallery */
#gallery-2d {
    position: relative;
    z-index: 10;
    background: var(--bg-color);
    min-height: 100vh;
    padding: 140px var(--spacing-unit) 4rem;
}

.gallery-header {
    margin-bottom: 6rem;
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
}

.gallery-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    /* Responsive Heading */
    font-weight: 300;
    margin-bottom: 1rem;
    color: var(--accent-color);
    letter-spacing: -0.02em;
}

.gallery-header p {
    color: var(--text-muted);
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    max-width: 600px;
    font-weight: 300;
}

.grid {
    display: grid;
    /* Optimised for mobile (1 col) -> tablet (2 col) -> desktop (3+ col) */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 4rem 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
}

.card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    cursor: pointer;
    group: hover;
    /* placeholder for syntax */
}

.card-image {
    width: 100%;
    aspect-ratio: 3/4;
    /* Consistent vertical layouts */
    overflow: hidden;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    position: relative;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.7s ease;
    opacity: 0.8;
}

.card:hover .card-image img {
    transform: scale(1.03);
    opacity: 1;
}

/* Fallback for no image */
.no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.card-info h3 {
    font-family: var(--font-heading);
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.card:hover .card-info h3 {
    color: var(--accent-color);
}

footer {
    text-align: center;
    margin-top: 8rem;
    padding-top: 4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    :root {
        --spacing-unit: 1.5rem;
    }

    #gallery-2d {
        padding-top: 100px;
    }

    .gallery-header {
        margin-bottom: 4rem;
    }

    .grid {
        gap: 3rem 1rem;
        grid-template-columns: 1fr;
        /* Force single column on strict mobile */
    }
}