/* === ベース設定（モバイルを基準） === */
body {
  font-family: 'Helvetica Neue', sans-serif;
  margin: 2em;
  background: #f9f9f9;
  color: #333;
}

h2, h3 {
  color: #333;
}

.section {
  background: #fff;
  padding: 1em;
  margin-bottom: 1.5em;
  border-radius: 8px;
  box-shadow: 0 0 4px rgba(0,0,0,0.05);
}

button {
  margin: 0.3em;
  padding: 0.5em 1.2em;
  background: #007BFF;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1em;
}

table th, table td {
  border: 1px solid #ddd;
  padding: 0.6em;
  text-align: center;
}

input, select, textarea {
  margin: 0.4em 0;
  padding: 0.5em;
  width: 100%;
  box-sizing: border-box;
}