html{ margin:0; padding:0; }
body{ margin: 2em 2%; }

form.changeName{ 
   max-width:80%; box-sizing:border-box; 
}

form.changeName label{ display:none !important; }
form.changeName ul:not(class){ 
   list-style: none;
   display: flex; flex-flow: row wrap;
   flex-direction: row; /* row:横並び column:縦並び */
   justify-content: flex-start; /* flex-start:左寄せ center:真ん中 flex-end:右寄せ */
   gap: 5px 5px; /* 要素間のスペ―ス*/
}