:root {
    --bg-color: #F5F5F5;
    --text-color: #111111;
    --font-family: 'Inter', sans-serif;
    --spacing: 2rem;
    --header-height: 80px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
}

/* Header Styles */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 100;
    background: rgba(245, 245, 245, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing);
    height: 100%;
    max-width: 1600px;
    margin: 0 auto;
}

.logo a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    font-size: 14px;
    font-family: 'Barlow Semi Condensed', sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    color: var(--text-color);
    opacity: 0.7;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
}

.social-link:hover {
    opacity: 1;
}

/* Portfolio Grid */
.portfolio-grid {
    padding: calc(var(--header-height) + var(--spacing)) var(--spacing) var(--spacing);
    max-width: 1600px;
    margin: 0 auto;
    
    /* Masonry Layout */
    column-count: 3;
    column-gap: 1rem;
}

.grid-item {
    break-inside: avoid;
    margin-bottom: 1rem;
    overflow: hidden;
    background-color: #EAEAEA;
    
    /* Animation initial state */
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.grid-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.grid-item video,
.grid-item img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Footer Styles */
.site-footer {
    background-color: var(--bg-color);
    color: var(--text-color);
    width: 100%;
    margin-top: 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem var(--spacing);
    max-width: 1600px;
    margin: 0 auto;
}

.footer-copyright {
    font-family: 'Barlow Semi Condensed', sans-serif;
    font-size: 14px;
    letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .portfolio-grid {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing: 1rem;
        --header-height: 60px;
    }
    
    .portfolio-grid {
        column-count: 1;
    }
    
    .logo a {
        font-size: 0.875rem;
    }
}