.site-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid #50ddff66;
  border-radius: 8px;
  background: linear-gradient(135deg, #50ddff18, #a777ff1c);
  color: #d9f8ff;
  font-family: "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .06em;
}