ul.city{
  list-style: none;
  padding: 0;
  margin: 0;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;

  justify-content: start; /* ключевое */
}
ul.city > li{
  margin: 10px 0;
  max-width: 360px;
}
ul.city a{
    display: block;
    text-decoration: none;
    margin: 2px;
    padding: 5px 10px;
    /* border: 1px solid rgba(0, 0, 0, .12); */
    border-radius: 8px;
    background: #3b469d;
    color: #ffffff;
    font-size: 17px;
    font-weight: 500;
    line-height: 1.25;
    transition: transform .08s ease, box-shadow .12s ease, border-color .12s ease;
    word-break: break-word;
}
ul.city a:hover{
  border-color: rgba(0,0,0,.22);
  box-shadow: 0 6px 18px rgba(0,0,0,.08);
  transform: translateY(-1px);
}
ul.city ul.city{
  margin-top: 10px;
  padding-left: 14px;
  border-left: 2px solid rgba(0,0,0,.08);
}
ul.city ul.city a{
  font-size: 15px;
}
@media (min-width: 900px){
  ul.city{
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    align-items: start;
  }
  ul.city ul.city{
    display: block;
    grid-template-columns: none;
    gap: 0;
  }

  ul.city > li{
    margin: 0;
  }
}
@media (min-width: 600px) and (max-width: 899px){
  ul.city{
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    align-items: start;
  }

  ul.city ul.city{
    display: block;
  }

  ul.city > li{
    margin: 0;
  }
}
@media (max-width: 610px){
  ul.city a{
    font-size: 15px;
    padding: 11px 12px;
    border-radius: 8px;
  }
}