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

body {
    background: #0a0a0a;
    color: #fff;
    font-family: 'Inter', -apple-system, sans-serif;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 60px 20px 20px;
}

h1 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: #888;
    font-size: 16px;
    margin-bottom: 20px;
}

.back-link {
    color: #3b82f6;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.back-link:hover {
    color: #60a5fa;
}

.filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 20px 0 30px;
}

.filter-btn {
    padding: 8px 20px;
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 20px;
    color: #888;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover {
    border-color: #3b82f6;
    color: #fff;
}

.filter-btn.active {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-color: transparent;
    color: #fff;
}

.masonry {
    column-count: 4;
    column-gap: 16px;
    padding: 0 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.item {
    break-inside: avoid;
    margin-bottom: 16px;
    border-radius: 12px;
    overflow: hidden;
    background: #111;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.item img {
    width: 100%;
    display: block;
    cursor: pointer;
}

.download-btn {
    position: absolute;
    bottom: 10px;
    right: 10px;
    padding: 6px 14px;
    background: rgba(59, 130, 246, 0.9);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s;
}

.item:hover .download-btn {
    opacity: 1;
}

.download-btn:hover {
    background: rgba(59, 130, 246, 1);
}

footer {
    text-align: center;
    padding: 40px 20px;
    color: #666;
    font-size: 14px;
}

@media (max-width: 1200px) {
    .masonry { column-count: 3; }
}

@media (max-width: 800px) {
    .masonry { column-count: 2; }
}

@media (max-width: 500px) {
    .masonry { column-count: 1; }
    h1 { font-size: 28px; }
}