body {
  display: grid;
  place-items: center;
  height: 100vh;
  margin: 0;
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #d7f3f3, #eff1f1);
}

form {
  background-color: #ffffff;
  text-align: center;
  font-size: 18px;
  max-width: 400px;
  width: 90%;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

form:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

h1 {
  color: #007070;
  margin-bottom: 25px;
  font-size: 1.8em;
}

#textbox {
  width: 80%;
  text-align: center;
  font-size: 1.1em;
  border: 2px solid #00a6a6;
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 20px;
  outline: none;
  transition: border 0.2s ease;
}

#textbox:focus {
  border-color: #007070;
}

label {
  display: block;
  font-size: 1em;
  font-weight: 600;
  color: #333;
  margin: 8px 0;
}

input[type="radio"] {
  transform: scale(1.2);
  margin-right: 8px;
  accent-color: #007070;
}

button {
  margin-top: 20px;
  background-color: #007070;
  color: white;
  font-size: 1em;
  font-weight: 600;
  border: none;
  padding: 12px 25px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #009c9c;
}

#result {
  font-size: 1.4em;
  font-weight: bold;
  color: #222;
  margin-top: 20px;
}