aside.sta-ad {
  background-color: #f9f9f9;
  display: block;
  float: left;
  margin: 35px 0;
  padding: 30px;
  width: 100%;
}
aside.sta-ad h1 {
  color: #333;
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 10px;
}
aside.sta-ad p {
  color: #333;
  font-size: 1.8rem;
  line-height: 1.5;
  margin: 20px 0 40px;
}
aside.sta-ad a {
  border: 0;
  border-bottom: 0;
  border-radius: 5px;
  color: #fff;
  display: inline-block;
  padding: 10px 15px;
  text-align: center;
  text-decoration: none;
}
aside.sta-ad a:hover {
  color: #fff;
  filter: brightness(110%);
}
aside.sta-ad > footer {
  text-align: center;
}