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

:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --border-color: #e5e5e5;
    --hover-color: #f5f5f5;
    --accent-color: #000000;
    --accent-color-muted: #e5e5e553;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0a0a0a;
        --text-color: #e5e5e5;
        --border-color: #2a2a2a;
        --hover-color: #1a1a1a;
        --accent-color: #ffffff;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    width: 100%;
    flex: 1;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.7;
    font-weight: 400;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

@media (max-width: 640px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 1.5rem 1rem;
    }
    
    header {
        margin-bottom: 3rem;
        padding-bottom: 1.5rem;
    }
}

.project-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    background-color: var(--bg-color);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.project-title-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project-card h2 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
    color: var(--accent-color);
}

.project-buttons {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn {
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.85rem;
    background-color: transparent;
    transition: border-color 0.2s ease;
    white-space: nowrap;
}

.btn:hover {
    border-color: var(--accent-color-muted);
}

.project-card p {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.project-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.85rem;
    opacity: 0.85;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 0.25rem;
}

.project-meta .meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.55rem;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.8rem;
    background-color: var(--hover-color);
    color: var(--text-color);
    opacity: 0.9;
    line-height: 1.2;
}

.tags.types .tag {
    border-color: var(--accent-color-muted);
    background-color: transparent;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.badge-uc {
    background-color: rgba(255, 165, 0, 0.12);
    color: #c76600;
    border: 1px solid rgba(255, 165, 0, 0.25);
}

footer {
    text-align: center;
    padding-top: 3rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    opacity: 0.6;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
}