:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}body{color:#1a1a1a;background:#f5f6f8;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.container{max-width:960px;margin:0 auto;padding:24px}.card{background:#fff;border:1px solid #e3e6ea;border-radius:12px;margin-bottom:16px;padding:20px}input,button,select{font:inherit}label{color:#444;margin-bottom:4px;font-size:14px;display:block}input{border:1px solid #cfd4da;border-radius:8px;width:100%;margin-bottom:12px;padding:10px 12px}button{color:#fff;cursor:pointer;background:#2f6fed;border:none;border-radius:8px;padding:10px 16px}button.secondary{color:#1a1a1a;background:#e9edf2}button:disabled{opacity:.6;cursor:default}.error{color:#b00020;margin-bottom:12px}.muted{color:#667}nav a{color:#2f6fed;margin-right:16px;text-decoration:none}header.app-header{background:#fff;border-bottom:1px solid #e3e6ea;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;display:flex}code{background:#eef1f5;border-radius:6px;padding:2px 6px}