@charset "UTF-8";
/* CSS Document */

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #fdfdfd;
  text-align: center;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.responsive {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.button-container {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: center;
  padding: 0 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  width: 100%;
  max-width: 500px;
  padding: 15px 30px;
  border: none;
  font-size: 24px; /* ← 統一ポイント */
  text-decoration: none;
  font-weight: bold;
  color: white;
  background-color: #2196f3;
  transition: background-color 0.3s ease;
  box-sizing: border-box;
  border-radius: 0;
  box-shadow: none;
}

.btn:hover {
  background-color: #64b5f6;
}

/* スマホ対応 */
@media (max-width: 600px) {
  .btn {
    font-size: 16px;
    padding: 12px 24px;
  }
  .button-container {
    padding: 0 10px;
  }
}

/* ▼ 公開掲示板サブリンクパネル */
.sub-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.5s ease;
  background-color: #e3f2fd; /* ← ここ変更 */
  border-top: 1px solid #ccc;
  text-align: center;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding: 0;
}

.sub-panel a {
  display: block;
  padding: 15px;
  font-size: 16px;
  color: #2196f3;
  text-decoration: none;
  border-bottom: 1px solid #e0e0e0;
  transition: background-color 0.3s;
}

.sub-panel a:hover {
  background-color: #e3f2fd;
}


.board-panel {
  margin-top: 10px;
  padding: 20px;
  background-color: #fffdee;
  border: 1px solid #ccc;
  width: 100%;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  border-radius: 8px;
}
.board-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.board-panel li {
  margin: 10px 0;
}
.board-panel a {
  text-decoration: none;
  color: #2a2a6e;
  font-weight: bold;
}


.button {
  display: inline-block;
  background-color: #2196F3;
  color: white;
  font-size: 24px;
  font-weight: bold;
  padding: 15px 30px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  margin: 20px auto;
  transition: background-color 0.3s ease;
}

.button:hover {
  background-color: #1976D2;
}