:root{--bg:#ffffff;--surface:#f7f8fa;--text:#16191d;--text-muted:#5f6671;--border:#e5e8ec;--accent:#1f7a8c;--expense:#b4451f;--income:#1d7a4d;--warn:#9a6b00}*{box-sizing:border-box}body{margin:0;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans KR,Noto Sans JP,sans-serif;line-height:1.6}.nav,body{background:var(--bg)}.nav{display:flex;align-items:center;gap:20px;padding:14px 24px;border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0}.nav .brand{font-weight:600;color:var(--text);text-decoration:none;font-size:18px}.nav nav{display:flex;gap:16px;flex-wrap:wrap}.nav nav a{color:var(--text-muted);text-decoration:none;font-size:14px}.nav nav a:hover{color:var(--accent)}.container{max-width:960px;margin:0 auto;padding:28px 24px 64px}h1{font-size:24px;margin:0 0 4px}h1,h2{font-weight:600}h2{font-size:18px;margin:28px 0 8px}.lede{color:var(--text-muted);margin:0 0 16px}.card{border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin:12px 0;background:var(--bg)}.muted,.scaffold{color:var(--text-muted);font-size:13px}.scaffold{border:1px dashed var(--border);border-radius:8px;padding:10px 12px}.scaffold,.tag{background:var(--surface)}.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:999px;color:var(--text-muted);margin-right:6px}