:root{--bg:#fff;--surface:#fff;--surface-subtle:#f7f8fa;--text:#1f2937;--muted:#6b7280;--border:#e5e7eb;--accent:#2563eb;--accent-text:#fff;--warn-bg:#fff7ed;--warn-text:#9a3412;--preview-bg:#f7f8fa;--radius:14px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}[hidden]{display:none!important}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}body{background:var(--bg);color:var(--text);-webkit-text-size-adjust:100%;margin:0;font-family:Hiragino Sans,Noto Sans JP,Yu Gothic UI,Meiryo,system-ui,sans-serif;line-height:1.6}.site-header{text-align:center;padding:28px 16px 8px}.top-nav{border-bottom:1px solid var(--border);padding:10px 16px}.top-nav-link{color:var(--text);align-items:center;gap:8px;font-size:.85rem;font-weight:600;text-decoration:none;display:inline-flex}.top-nav-link:hover,.top-nav-link:focus-visible{color:var(--accent)}.top-nav-link 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