:root {
    --primary: #121212;
    --secondary: #6B7280;
    --bg-color: #ffffff;
    --surface-color: #F9FAFB;
    --border-color: #E5E7EB;
    --text-main: #111827;
    --text-muted: #6B7280;
    --radius: 6px;
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.navbar {
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.025em;
    font-size: 1.25rem;
}

.hero {
    padding: 6rem 0 4rem;
}

.hero h1 {
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
    font-size: 3.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.25rem;
    max-width: 600px;
}

/* Filter Bar */
.filter-bar {
    margin-bottom: 3rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.25rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Project Grid */
.project-card {
    border: none;
    background: var(--surface-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    text-decoration: none;
    display: block;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.project-image-wrapper {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: #eee;
}

.project-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image-wrapper img {
    transform: scale(1.05);
}

.project-content {
    padding: 1.5rem;
}

.project-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0;
    color: var(--text-main);
}

footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 6rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
}