/* Masterclass Design System */
:root {
    --bg-color: #0d0d0d;
    --text-color: #e0e0e0;
    --accent-color: #d4af37;
    /* Metallic Gold */
    --hover-overlay: rgba(0, 0, 0, 0.4);
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Manrope', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: var(--font-heading);
    color: #fff;
}

/* Header */
header {
    height: 60vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, #0d0d0d 100%);
    margin-bottom: 4rem;
}

header h1 {
    font-size: 5rem;
    font-weight: 400;
    letter-spacing: -2px;
    margin-bottom: 1rem;
    font-style: italic;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--accent-color);
    letter-spacing: 4px;
    text-transform: uppercase;
    font-weight: 400;
    opacity: 0.8;
}

/* Grid Layout (Strict Order - Tetris Pattern) */
.gallery-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    /* Fixed 3 columns for pattern control */
    grid-auto-rows: 400px;
    gap: 2rem;
    padding: 0 4rem 4rem 4rem;
    max-width: 1800px;
    margin: 0 auto;
    /* Removed 'dense' to strictly respect DOM order */
}

/* Base Gallery Item */
.gallery-item {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* 
   Pattern Logic for 3 Columns:
   Repeats every 12 items to ensure perfect packing without gaps.
   Order is strictly 1, 2, 3, 4...
*/

/* Item 1: 2x2 Big Block */
.gallery-item:nth-child(12n + 1) {
    grid-column: span 2;
    grid-row: span 2;
}

/* Items 2, 3: Vertical stack on the right of Item 1 */

/* Item 4, 5, 6: Row of singles */

/* Item 8: 2x2 Big Block in the middle/right? 
   Item 7 (1x1 col 1), Item 8 (2x2 col 2-3)
*/
.gallery-item:nth-child(12n + 8) {
    grid-column: span 2;
    grid-row: span 2;
}

/* 
   Mobile/Tablet Adjustments 
   Reset pattern and go to simple flex or 1-col grid 
*/
@media (max-width: 1024px) {
    .gallery-container {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 350px;
    }

    /* Reset all spans first */
    .gallery-item:nth-child(n) {
        grid-column: span 1;
        grid-row: span 1;
    }

    /* Simple 2-col pattern: Every 3rd item is big */
    .gallery-item:nth-child(3n + 1) {
        grid-column: span 2;
        grid-row: span 2;
    }
}

@media (max-width: 768px) {
    .gallery-container {
        grid-template-columns: 1fr;
        grid-auto-rows: 400px;
        padding: 0 1rem 1rem 1rem;
    }

    /* Full width for all on mobile */
    .gallery-item:nth-child(n) {
        grid-column: span 1;
        grid-row: span 1;
    }

    header h1 {
        font-size: 3rem;
    }
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: grayscale(100%) contrast(1.1);
    transition: filter 0.6s ease, transform 0.8s ease;
}

/* Hover Effects */
.gallery-item:hover {
    transform: translateY(-5px);
    z-index: 10;
}

.gallery-item:hover img {
    filter: grayscale(0%) contrast(1);
    transform: scale(1.05);
}

/* Content Overlay */
.gallery-item .content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.gallery-item:hover .content {
    opacity: 1;
    transform: translateY(0);
}

.gallery-item h2 {
    font-size: 3rem;
    opacity: 0.2;
    position: absolute;
    top: -3rem;
    left: 1rem;
    font-family: var(--font-body);
    font-weight: 700;
}

.gallery-item h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-style: italic;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    transform: translateY(10px);
    opacity: 0;
    transition: opacity 0.4s 0.1s, transform 0.4s 0.1s;
}

.gallery-item:hover h3 {
    opacity: 1;
    transform: translateY(0);
}

.gallery-item p {
    font-family: var(--font-body);
    font-size: 1rem;
    /* Smaller for description text */
    color: #e0e0e0;
    line-height: 1.4;
    transform: translateY(10px);
    opacity: 0;
    transition: opacity 0.4s 0.2s, transform 0.4s 0.2s;
}

.gallery-item:hover p {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem;
    border-top: 1px solid #222;
    color: #444;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 1.5s ease forwards;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-200 {
    animation-delay: 0.2s;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}