*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;min-height:100vh;font-family:var(
    --font-sans,"Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,sans-serif
  );background:#f5f5f5;color:#111}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer}button,input,textarea{font:inherit}:root{--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-border:#e5e7eb;--color-card:#fff;--radius:8px}