:root{
    --bg: #ffffff;
    --paper: #ffffff;
    --ink: #111827;
    --muted: #374151;
  
    --red: #e11d48;
    --blue: #1d4ed8;
    --yellow: #f59e0b;
    --green: #16a34a;
  
    --line: rgba(17,24,39,.18);
    --shadow: 0 10px 26px rgba(17,24,39,.10);
  
    --radius: 18px;
    --base: 18px;
    --max: 920px;
  
    --sans: system-ui, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", Segoe UI, Roboto, Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  }
  
  *{box-sizing:border-box}
  html,body{height:100%}
  body{
    margin:0;
    font-family:var(--sans);
    font-size:var(--base);
    color:var(--ink);
    background:var(--bg);
  }
  
  b{font-weight:900}