/* style.css */
:root {
  --primary-color: #007bff;
  --primary-hover-color: #0056b3;
  --background-color: #f8f9fa;
  --text-color: #212529;
  --border-color: #ced4da;
  --container-bg: #fff;
}

body {
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  margin: 0;
  padding: 2rem;
  font-family: Helvetica Neue, Hiragino Kaku Gothic ProN, Hiragino Sans, Noto Sans JP, Meiryo, Arial, sans-serif;
}

main {
  background-color: var(--container-bg);
  border-radius: 8px;
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  box-shadow: 0 4px 6px #0000001a;
}

h1 {
  text-align: center;
  color: var(--text-color);
  margin-bottom: 2rem;
}

#input-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

#input-form div {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

label {
  font-weight: bold;
}

input[type="text"], textarea {
  border: 1px solid var(--border-color);
  box-sizing: border-box;
  border-radius: 4px;
  width: 100%;
  padding: .75rem;
  transition: border-color .2s, box-shadow .2s;
  font-size: 1rem;
}

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px #007bff40;
}

button[type="submit"] {
  background-color: var(--primary-color);
  color: #fff;
  cursor: pointer;
  border: none;
  border-radius: 4px;
  padding: .75rem 1.5rem;
  transition: background-color .2s;
  font-size: 1rem;
  font-weight: bold;
}

button[type="submit"]:hover {
  background-color: var(--primary-hover-color);
}

#output-container {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.separator {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}