.three-boxes-container{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}.single-box{border-color:#fff;border-radius:15px;border-style:solid;font-family:Arial,sans-serif;overflow:hidden;width:300px}.single-box__top{background-color:var(--top-color,#19579b);font-size:24px;font-weight:700}.single-box__bottom,.single-box__top{color:#fff;padding:20px;text-align:center}.single-box__bottom{background-color:var(--bottom-color,#111);font-size:16px}