body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f2f2f2;
}

header {
  background-color: #333;
  color: #fff;
  padding: 10px;
}

header > h1 {
  text-align: center;
}

main {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
}

#memo-container {
  margin-top: 80px;
}

section {
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 20px;
  position: relative;
}

h2.memo-title {
  margin-top: 0;
}

button.delete-button {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 8px 16px;
  background-color: #333;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button.delete-button:hover {
  background-color: #555;
}
.memo-created {
  position: absolute;
  top: 10px;
  right: 20px;
  color: #555;
}
button.new-memo-button {
  display: block;
  margin: 0 auto;
  padding: 8px 20px;
  background-color: #333;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button.new-memo-button:hover {
  background-color: #555;
}
div.delete-all {
  position: absolute;
  right: 0;
  top: 50px;
  text-align: right;
}
button.delete-all-button {
  margin-right: 20px;
  padding: 8px 20px;
  background-color: #333;
  border: none;
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
}

@media screen and (max-width: 768px) {
  body {
    font-size: 14px;
  }
  section {
    height: 80px;
  }
}