* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: cursive, sans-serif;
  font-size: 16px;
  line-height: 1.2;
  background-image: linear-gradient(45deg, #f5f7fa 0%, #c3cfe2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
/* main content */
.main-content {
  text-align: center;
  width: 90%;
  margin: 0 auto;
  opacity: 0;
  display: none;
  transition: opacity 2s ease-in;
  color: #000;
}
.main-content h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}
.main-content p {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.main-content a {
  padding: 14px 16px;
  background-color: #33cea0;
  color: #0d2934;
  text-decoration: none;
  display: inline-block;
  border-radius: 10px;
}
.main-content a:hover {
  opacity: 0.9;
}