:root{--bg: #f6f7f9;--surface: #ffffff;--border: #e2e5ea;--text: #1b1f24;--muted: #6b7280;--accent: #2f5bd7;--accent-soft: #eaf0fe;--danger: #c0392b;--danger-soft: #fdecea;--ok: #1e7a4d;--radius: 8px;--font: "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased}code,pre{font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,monospace;font-size:12px}h1{font-size:22px;margin:0}h2{font-size:16px;margin:0 0 12px}h3{font-size:13px;margin:16px 0 8px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}small{font-weight:400;color:var(--muted);margin-left:8px;font-size:13px}button{font:inherit;padding:7px 14px;border:1px solid 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