body{
  margin:0;
  font-family:Arial, sans-serif;
  background:#0b1220;
  color:#e2e8f0;
}
.back{
  display:inline-block;
  margin:16px 20px 0;
  text-decoration:none;
  color:#38bdf8;
}
.back:active{background:#a78bfa;color:#fff;border-radius:8px;padding:2px 6px;}
h1{margin:14px 20px 20px;font-size:28px;}
.center-box{
  width:387px;
  height:100px;
  margin:100px auto 0;
  background:#1e293b;
  border-radius:16px;
  padding:12px;
  box-sizing:border-box;
  display:flex;
  align-items:center;
}
.center-menu__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  gap:8px;
}
.center-menu__link{
  display:block;
  padding:8px 10px;
  background:#94a3b8;
  color:#0b1220;
  text-decoration:none;
  border-radius:10px;
  font-size:14px;
  white-space:nowrap;
  transition:0.15s;
}
.center-menu__link:hover{background:#cbd5e1;}
.center-menu__link:active{background:#a78bfa;color:#fff;}
.center-menu__link:focus{outline:3px solid #38bdf8;outline-offset:2px;}