枠線が大変なことに How to Create Multiple Borders in CSS3 .multiple-box-shadow{ box-shadow: 0 0 0 2px #000, 0 0 0 3px #999, 0 0 0 9px #fa0, 0 0 0 10px #666, 0 0 0 16px #fd0, 0 0 0 18px #000, 0 2px 6px 18px rgba(0,0,0,0.5); } .centerd-text{ display: flex … 続きを読む multiple-box-shadow