body {
  font-family: monospace;
  background-color: #757575;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

main {
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.card,
.grid-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  background-color: darkgray;
  border: 3px dashed blue;
  padding: 15px;
  align-items: center;
}

@keyframes blink {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

img,
h1,
.header-card {
  box-shadow: 2px 3px 3px rgba(0, 0, 0, 0.5);
  border-style: double;
  max-width: 100%;
}

a {
  animation: blink 1s infinite;
}

.project-box {
  border: 5px solid darkblue;
  background-color: #8a8a8a;
  padding: 15px;
  width: fit-content;
  margin: 0 auto;
}

details {
  position: relative;
}

details > *:not(summary) {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: darkgray;
  border: 3px dashed blue;
  padding: 10px;
  z-index: 10;
  box-sizing: border-box;
}