body{ font-family: Arial, sans-serif; background:#f2f2f2; padding:20px; }
h2{ color:#333; }
select, button{ padding:10px; margin:5px 0; }
button{ cursor:pointer; background:#4CAF50; color:white; border:none; border-radius:5px; }
button:hover{ background:#45a049; }
#result{ margin-top:10px; font-weight:bold; }