body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
  margin: 0;
  padding: 0;
  text-align: center;
}
header {
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 16px;
  border-bottom: 1px solid #e0e0e0;
}
main {
  padding: 40px;
}
.input-box {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 24px;
  display: inline-block;
  margin-top: 20px;
}
.input-box input, .input-box textarea {
  width: calc(50% - 10px);
  margin: 5px;
  padding: 12px;
  border: 1px solid #d1d1d6;
  border-radius: 8px;
  font-size: 16px;
  background: #f9f9f9;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.input-box input:focus, .input-box textarea:focus {
  border-color: #007aff;
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
  outline: none;
}
.input-box textarea {
  width: 90%;
  height: 100px;
}
button {
  background: #007aff;
  color: white;
  padding: 12px 28px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
button:hover {
  background: #005bb5;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.result-box {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 24px;
  margin-top: 30px;
  max-width: 800px;
  display: inline-block;
  text-align: left;
}