:root{--bg-color: #ffffff;--text-color: #333333;--card-bg: #ffffff;--card-border: #e1e4e8;--tag-bg: #f1f8ff;--link-color: #0366d6}[data-theme="dark"]{--bg-color: #1a1a1a;--text-color: #ffffff;--card-bg: #2d2d2d;--card-border: #404040;--tag-bg: #3d4756;--link-color: #79c0ff}body{font-family:-apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;line-height:1.6;max-width:800px;margin:0 auto;padding:2rem;background-color:var(--bg-color);color:var(--text-color);transition:background-color 0.3s ease, color 0.3s ease}nav{margin-bottom:2rem;display:flex;justify-content:space-between;align-items:center}nav .nav-links a{margin-right:1rem;text-decoration:none;color:var(--text-color)}nav .nav-links a:hover{color:var(--link-color)}.theme-switch{background:none;border:2px solid var(--text-color);color:var(--text-color);padding:0.5rem 1rem;border-radius:2rem;cursor:pointer}.theme-switch:hover{opacity:0.8}.project-card{border:1px solid var(--card-border);padding:1rem;margin-bottom:1rem;border-radius:4px;background-color:var(--card-bg)}.tags{display:flex;flex-wrap:wrap;gap:0.5rem}.tags .tag{background:var(--tag-bg);padding:0.2rem 0.5rem;border-radius:2rem;font-size:0.9rem;color:var(--text-color)}.profile-image{max-width:200px;border-radius:50%}.project-card{border:1px solid #e1e4e8;padding:1rem;margin-bottom:1rem;border-radius:4px}.tags{display:flex;flex-wrap:wrap;gap:0.5rem}.tags .tag{background:#f1f8ff;padding:0.2rem 0.5rem;border-radius:2rem;font-size:0.9rem}.social-links{text-align:center;margin:1rem 0}.social-links a{text-decoration:none;margin:0 0.5rem;color:var(--link-color)}.social-links a:hover{text-decoration:underline}