body{font-family:Arial;background:#f5f7fb;margin:0}
header{display:flex;align-items:center;gap:20px;padding:10px;background:white}
.calendar{padding:20px}
.month{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.day{background:white;padding:10px;border-radius:6px;text-align:center}