:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-purple:#7c3aed;--color-purple-dark:#6d28d9;--color-gray-50:#f9fafb;--color-gray-100:#f3f4f6;--color-gray-200:#e5e7eb;--color-gray-500:#6b7280;--color-gray-700:#374151;--color-gray-900:#111827;--max-width:1080px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--color-gray-900);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.skip-link{background:var(--color-primary);color:#fff;z-index:1000;border-radius:0 0 8px 8px;padding:.75rem 1.5rem;font-weight:600;text-decoration:none;position:absolute;top:-100%;left:1rem}.skip-link:focus{top:0}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}