body {
  background-color: rgb(240, 250, 203);
  font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
  margin: 20px;
  color: rgb(24, 37, 183);
  text-align: center;
}

h1 {
  color: rgb(13, 163, 136);
  font-size: 30px;
  border-bottom: 3px solid rgb(13, 163, 136);
  padding-bottom: 10px;
}

h2 {
  color: rgb(13, 163, 136);
}

label {
  font-weight: bold;
}

input {
  padding: 5px;
  font-size: 14px;
  width: 100px;
  border: 2px solid darkblue;
  border-radius: 4px;
}

button {
  background-color: darkblue;
  color: white;
  padding: 8px 16px;
  font-size: 14px;
  border: none;
  cursor: pointer;
  border-radius: 4px;
  margin: 4px;
}

button:hover {
  background-color: blue;
}

#shape-img {
  width: 200px;
  height: 152px;
  object-fit: contain;
  border: 2px solid darkblue;
  border-radius: 6px;
  display: block;
  margin: 16px auto 8px auto;
  opacity: 1;
  transition: opacity 0.4s ease;
  background-color: white;
}

#shape-img.fade {
  opacity: 0;
}

#shape-label {
  color: rgb(13, 163, 136);
  font-style: italic;
  margin-bottom: 10px;
}

#p1 {
  background-color: white;
  padding: 15px 20px;
  border: 2px solid darkblue;
  border-radius: 6px;
  width: 320px;
  font-size: 15px;
  line-height: 1.8;
  margin: 0 auto;
  text-align: center;
}

#menu-error {
  color: red;
  font-weight: bold;
}

#input-error {
  color: red;
  font-weight: bold;
}

#input-section {
  display: none;
}

#result-section {
  display: none;
}