:root {
    --bg-dark: #0f0f11;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --accent: #ff007b;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(15, 15, 17, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem 0;
}

.header-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}
.logo span { color: var(--accent); }

.filter-group {
    display: flex;
    gap: 0.5rem;
    background: var(--glass-bg);
    padding: 0.4rem;
    border-radius: 100px;
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1.2rem;
    border-radius: 100px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.filter-btn.active, .filter-btn:hover {
    background: #fff;
    color: #000;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-dark);
    padding: 0.6rem 1.5rem;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s ease;
}
.btn-primary:hover {
    transform: scale(1.05);
}

/* Gallery Layout */
.gallery-container {
    max-width: 1600px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.masonry-gallery {
    column-count: 4;
    column-gap: 1.5rem;
}

@media (max-width: 1200px) { .masonry-gallery { column-count: 3; } }
@media (max-width: 800px) { .masonry-gallery { column-count: 2; } }
@media (max-width: 500px) { 
    .masonry-gallery { column-count: 1; } 
    .filter-group { display: none; }
    .header-container { flex-direction: column; gap: 1rem; }
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: 1.5rem;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transform: translateY(20px);
    opacity: 0;
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Delay staggered animation */
.gallery-item:nth-child(1) { animation-delay: 0.05s; }
.gallery-item:nth-child(2) { animation-delay: 0.1s; }
.gallery-item:nth-child(3) { animation-delay: 0.15s; }
.gallery-item:nth-child(4) { animation-delay: 0.2s; }
.gallery-item:nth-child(5) { animation-delay: 0.25s; }
.gallery-item:nth-child(6) { animation-delay: 0.3s; }
.gallery-item:nth-child(7) { animation-delay: 0.35s; }
.gallery-item:nth-child(8) { animation-delay: 0.4s; }

@keyframes fadeUp {
    to { transform: translateY(0); opacity: 1; }
}

.gallery-item img {
    width: 100%;
    display: block;
    border-radius: 16px;
    transition: transform 0.5s ease;
}

.item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.gallery-item:hover img {
    transform: scale(1.03);
}

.badge {
    align-self: flex-start;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.overlay-content h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 0.2rem;
    transform: translateY(10px);
    transition: transform 0.3s ease;
}

.overlay-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transform: translateY(10px);
    transition: transform 0.3s ease 0.05s;
}

.gallery-item:hover .overlay-content h3,
.gallery-item:hover .overlay-content p {
    transform: translateY(0);
}

/* Filtering logic helper classes */
.gallery-item.hidden {
    display: none;
}

/* Infinite Scroll Loader */
.loader-container {
    display: flex;
    justify-content: center;
    padding: 3rem 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.loader-container.visible {
    opacity: 1;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}