/* 基本レイアウト */
body {
  font-family: "Helvetica Neue", sans-serif;
  background-color: #f4f4f8;
  margin: 0;
  padding: 0;
  color: #333;
}

.container {
  max-width: 960px;
  margin: 40px auto;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* ヘッダー */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
header h1 {
  margin: 0;
  font-size: 1.8rem;
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 8px 14px;
  margin: 4px 0;
  background-color: #3498db;
  color: white;
  text-decoration: none;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}
.btn:hover {
  background-color: #2980b9;
}
.btn-secondary {
  background-color: #aaa;
}
.btn-secondary:hover {
  background-color: #888;
}
.btn-danger {
  background-color: #e74c3c;
}
.btn-danger:hover {
  background-color: #c0392b;
}

/* フォーム */
.form {
  margin-top: 20px;
}
.form-group {
  margin-bottom: 15px;
}
label {
  display: block;
  margin-bottom: 4px;
  font-weight: bold;
}
input[type="text"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.95rem;
}
textarea {
  resize: vertical;
}
.required {
  color: red;
}

/* テーブル */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
.data-table th,
.data-table td {
  padding: 10px;
  border-bottom: 1px solid #ddd;
  text-align: left;
}
.data-table th {
  background-color: #f2f2f2;
}
.data-table tr:hover {
  background-color: #f9f9f9;
  cursor: pointer;
}
.data-table .btn-danger {
  padding: 4px 8px;
  font-size: 0.8rem;
}

/* フラッシュメッセージ */
.flash-message {
  padding: 12px 16px;
  background-color: #dff0d8;
  border: 1px solid #b2d8a4;
  color: #3c763d;
  margin-bottom: 20px;
  border-radius: 4px;
}

/* 検索フォーム */
.search-form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
.search-form input[type="text"] {
  flex: 2;
}
.search-form select {
  flex: 1;
}
.search-form button {
  flex: 0.8;
}

/* データなし */
.no-data {
  text-align: center;
  color: #888;
  font-style: italic;
}