body {
  font-family: sans-serif;
  background-color: #ffffff;
  padding: 30px;
}

.index-link {
  text-align: center;
  margin-bottom: 20px;
}

.index-link a {
  color: #0066cc;
  text-decoration: none;
  font-size: 0.95rem;
}

.index-link a:hover {
  text-decoration: underline;
}

.container {
  background: white;
  padding: 20px;
  border-radius: 8px;
  width: 90%;
  max-width: 800px;
  margin: 0 auto;   /* ←これが重要 */
   border: 5px solid #666;
}

h3 {
  text-align: center;
  color: #333;
}

#progress {
  text-align: center;
  font-size: 1.17em;
  font-weight: bold;
  color: #333;
  background-color: #f0f8ff;
  padding: 8px;
  border-radius: 6px;
  margin: 15px 0;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

li {
  border-bottom: 1px solid #eee;
  padding: 8px 0;
}

li label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  width: 100%;
  justify-content: flex-start; /* 左寄せ */
}

li span {
  flex: 1;                 /* 残りの幅を使う */
  white-space: normal;     /* 改行を許可 */
  overflow-wrap: anywhere; /* 長い文字列も折り返す */
  word-break: break-word;
}

.completed span {
  text-decoration: line-through;
  color: #888;
}