:root{--bg-color:#ffffff;--card-bg:#f8f8f8;--text-main:#cc0000;--text-muted:#666666;--border-color:#00cc66;--input-bg:#f2a7c2;--nav-text:#cc0000}.dark-theme{--bg-color:#0d1117;--card-bg:#161b22;--text-main:#e6edf3;--text-muted:#8b949e;--border-color:#30363d;--input-bg:#0d1117;--nav-text:#f85149}body{margin:0;background-color:var(--bg-color);color:var(--text-main);font-family:Segoe UI,sans-serif;transition:all .3s ease}.nav-container{display:flex;gap:2rem;flex-wrap:wrap}@media (max-width:600px){.nav-container{gap:1rem;justify-content:center}}