body {
  font-family: "Comic Sans MS", "Courier New", Arial, sans-serif;
  background-color: #c1d7d5;
  color: black;
  margin: 0;
}

header {
    text-align: center;
}

header>h1 {
    color: red;
}

.page {
  display: grid;
  grid-template-columns: 1fr 800px 1fr;
  gap: 0;
} 

.sidebar {
    display: flex;
    justify-content: center;
}

main {
    background-color: white;
    border: 3px solid magenta;
    padding: 10px; 
}

#cards {
    display: flex;
    justify-content: center;
}

#cards > img {
  width: 200px;
}

.blink_me {
  animation: blinker 0.2s steps(1, end) infinite;
}

@keyframes blinker {
  50% {
    opacity: 0;
  }
}

footer {
}