*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#fafafa;--color-text:#1a1a1a;--color-primary:#646cff;--color-primary-hover:#535bf2;--color-muted:#6b7280;--font-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--max-width:960px}html{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:1.6}body{min-height:100dvh}a{color:var(--color-primary);font-weight:500;text-decoration:none}a:hover{color:var(--color-primary-hover)}.app{flex-direction:column;min-height:100dvh;display:flex}.header{border-bottom:1px solid #e5e7eb;padding:1rem 2rem}.header nav{max-width:var(--max-width);gap:1.5rem;margin:0 auto;display:flex}.main{max-width:var(--max-width);flex:1;width:100%;margin:0 auto;padding:2rem}.footer{text-align:center;color:var(--color-muted);border-top:1px solid #e5e7eb;padding:1rem 2rem;font-size:.875rem}@media (prefers-color-scheme:dark){:root{--color-bg:#1a1a1a;--color-text:#f5f5f5}.header{border-bottom-color:#333}.footer{border-top-color:#333}}