/* ===== 全体の基本スタイル ===== */
body {
  font-family: "Segoe UI", "ヒラギノ角ゴ ProN", sans-serif;
  background-color: #f0f4f8;
  margin: 0;
  padding: 0;
  color: #333;
}

/* ===== ヘッダー ===== */
header {
  background-color: #4a90e2;
  color: white;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

header h1 {
  margin: 0;
  font-size: 1.8em;
}

/* ===== ハンバーガーメニューボタン ===== */
#menu-toggle {
  background: none;
  border: none;
  color: white;
  font-size: 28px;
  cursor: pointer;
  user-select: none;
  padding: 0;
  line-height: 1;
  position: absolute;
  top: 22px;
  right: 20px;
  z-index: 1100;
}

/* ===== ナビゲーションメニュー（ハンバーガー） ===== */
nav ul.menu-bar {
  list-style: none;
  position: absolute;
  top: 60px;
  right: 20px;
  width: 180px;
  background-color: #4a90e2;
  border-radius: 6px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  display: none;
  flex-direction: column;
  z-index: 1000;
  padding: 10px 0;
  margin: 0;
}

nav ul.menu-bar.show {
  display: flex;
}

nav ul.menu-bar li {
  border-bottom: 1px solid rgba(255,255,255,0.3);
}

nav ul.menu-bar li:last-child {
  border-bottom: none;
}

nav ul.menu-bar li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  padding: 12px 15px;
  display: block;
}

nav ul.menu-bar li a:hover {
  background-color: #357ab8;
  border-radius: 4px;
}

/* ===== メインコンテンツ ===== */
main {
  padding: 40px 20px;
  max-width: 800px;
  margin: 30px auto;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  text-align: center;
}

main h2 {
  font-size: 1.5em;
  margin-bottom: 25px;
}

/* ===== 共通フォームコンテナ（ログイン・登録・表示名・リセット） ===== */
.login-container,
.signup-container,
.displayname-container,
.reset-container {
  max-width: 400px;
  margin: 80px auto;
  padding: 30px;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  text-align: left;
}

.signup-container h1,
.login-container h2,
.signup-container h2,
.displayname-container h2,
.reset-container h2 {
  text-align: center;
  margin-bottom: 20px;
}

.login-container label,
.signup-container label,
.profile-container label {
  display: block;
  margin-top: 10px;
  margin-bottom: 5px;
  font-weight: bold;
}

/* ===== 共通フォーム入力 ===== */
.login-container input,
.signup-container input,
.displayname-container input,
.reset-container input,
.profile-container input[type="text"],
.profile-container input[type="email"] {
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 1em;
}

/* ===== 共通ボタンスタイル ===== */
.login-container button,
.signup-container button,
.displayname-container button,
.reset-container button,
.profile-container button {
  width: 100%;
  background-color: #4a90e2;
  color: white;
  border: none;
  padding: 10px;
  border-radius: 5px;
  font-size: 1em;
  cursor: pointer;
  transition: background-color 0.3s ease;
  box-sizing: border-box;
}

.login-container button:hover,
.signup-container button:hover,
.displayname-container button:hover,
.reset-container button:hover,
.profile-container button:hover:not(:disabled) {
  background-color: #357ab8;
}

.profile-container button:disabled {
  background-color: #9bbce6;
  cursor: not-allowed;
}

/* ===== プロフィール編集画面 ===== */
.profile-container {
  max-width: 420px;
  margin: 60px auto;
  background-color: #fff;
  border-radius: 10px;
  padding: 30px 25px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  text-align: left;
}

.profile-container h2 {
  margin-bottom: 25px;
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  color: #222;
}

.profile-container label {
  color: #444;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
}

.profile-container input[readonly] {
  border: none;
  background-color: transparent;
  cursor: default;
  color: #333;
  font-size: 1rem;
}

.profile-container input:not([readonly]) {
  border: 1.5px solid #ccc;
  background-color: white;
  transition: border-color 0.3s ease;
}

.profile-container input:not([readonly]):focus {
  border-color: #4a90e2;
  box-shadow: 0 0 5px rgba(74,144,226,0.4);
}

.profile-container .button-group {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.profile-container button {
  flex: 1;
  padding: 14px 0;
  background-color: #4a90e2;
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 7px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#edit-btn {
  width: 100%;
  margin-top: 10px;
  padding: 14px 0;
}

/* ===== メッセージ表示 ===== */
.message {
  margin-top: 15px;
  font-size: 1rem;
  text-align: center;
}

.message.success {
  color: #28a745;
}

.message.error {
  color: #dc3545;
}

/* ===== トップページのログイン・新規登録ボタン ===== */
/* ===== 共通スタイル ===== */
.top-links a {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 50px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 2px solid #4a90e2;
  color: #4a90e2;
  background-color: white;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.top-links a:hover {
  background-color: #4a90e2;
  color: white;
  box-shadow: 0 6px 10px rgba(0,0,0,0.15);
}

/* ===== 新規登録ボタン専用 ===== */
.top-links .signup-btn {
  background-color: #4a90e2; /* 青地 */
  color: white;             /* 白文字 */
}

.top-links .signup-btn:hover {
  background-color: #2563eb; /* 少し濃い青に変化 */
  border-color: #2563eb;
}


/* ===== リンク集 ===== */
.links {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.links a {
  display: inline-block;
  padding: 8px 14px;
  background: #f0f4f8;
  border-radius: 6px;
  text-decoration: none;
  color: #0077cc;
  font-size: 0.95em;
  transition: background 0.2s;
}

.links a:hover {
  background: #e0ecf8;
}

/* ===== フッター ===== */
footer {
  background-color: #f5f5f5;
  text-align: center;
  padding: 10px;
  font-size: 0.9em;
  color: #777;
  border-top: 1px solid #ddd;
}

/* ===== ニュース詳細ページ ===== */
.news-detail {
  text-align: left;
}

.news-item .news-header {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid #ddd;
}

.news-item .news-category {
  display: inline-block;
  background-color: #4a90e2;
  color: white;
  font-size: 0.75em;
  padding: 3px 10px;
  border-radius: 12px;
  margin-right: 8px;
}

.news-item .news-header .news-date {
  color: #777;
  font-size: 0.9em;
  margin-left: 0;
}

.news-item .news-title {
  margin: 10px 0 0;
  font-size: 1.3em;
}

.news-item .news-body p {
  line-height: 1.8;
  margin-bottom: 1em;
}

.news-item .news-body a {
  color: #0077cc;
}

/* ===== 講座メタ情報 ===== */
.course-meta {
  font-size: 0.9em;
  color: #666;
  margin-top: 4px;
  line-height: 1.3;
}

/* ===== 登録済み講座なしメッセージ ===== */
#enrolled-courses-list li.no-courses-message {
  text-align: center;
  color: #999;
  font-style: italic;
  cursor: default;
  box-shadow: none;
  background: none;
  border: none;
  padding: 10px 0;
  transform: none !important;
  border-color: transparent !important;
  pointer-events: none;
}

/* ===== ログインページ用追加スタイル ===== */
.login-container p {
  font-size: 0.9em;
  color: #555;
  margin-top: 20px;
}

#resend-section {
  margin-top: 20px;
}

#back-to-login {
  margin-top: 20px;
  font-size: 0.9em;
  color: #b33;
}

#back-to-login a {
  color: #b33;
  text-decoration: underline;
  cursor: pointer;
}

#back-to-login a:hover {
  color: #800;
}


.news-tab {
  margin-top: 20px;
  padding: 10px 0;
  border-top: 1px solid #ddd;
  font-size: 0.85em;
  color: #666;
  text-align: left;
}

.news-tab h3 {
  font-size: 0.95em;
  margin: 0 0 10px;
  color: #444;
  font-weight: normal;
}

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

.news-tab li {
  margin: 6px 0;
}

/* ニュースのリンク（flexで左右に分ける） */
.news-tab ul li a {
  display: flex;                  /* ← 横並び */
  justify-content: space-between; /* ← タイトル左・日付右 */
  align-items: center;            /* ← 縦を中央揃え */
  padding: 6px 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  color: #0077cc;
  text-decoration: none;
  background-color: #fafafa;
  transition: background-color 0.2s, border-color 0.2s;
  font-size: 0.85em;
}

.news-tab ul li a:hover {
  background-color: #f0f8ff;
  border-color: #0077cc;
  color: #005999;
}

/* 日付部分（右側） */
.news-date {
  font-size: 0.75em;
  color: #555;           /* 黒っぽい薄い文字 */
  margin-left: 12px;     /* タイトルとの余白 */
  white-space: nowrap;   /* 折り返さない */
}

/* 「過去のニュースはこちら」 */
.more-news {
  margin-top: 12px;
  font-size: 1em;
  text-align: left;
}

.more-news a {
  color: #0077cc;
  text-decoration: none;
  font-weight: bold;
}

.more-news a:hover {
  text-decoration: underline;
  color: #005999;
}




/* ===== レスポンシブ対応 ===== */
@media (max-width: 600px) {
  main {
    margin: 15px;
    padding: 15px;
  }

  nav ul.menu-bar {
    width: 140px;
    top: 55px;
    right: 15px;
  }

  nav ul.menu-bar li a {
    padding: 10px 12px;
    font-size: 0.9em;
  }

  main h2 {
    font-size: 1.2em;
  }

  .top-links {
    flex-direction: column;
    gap: 15px;
  }

  #enrolled-courses-list {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }

  /* ログイン・登録フォーム幅調整 */
  .login-container,
  .signup-container,
  .displayname-container,
  .reset-container {
    max-width: 90%;
    margin: 40px auto;
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .profile-container {
    margin: 40px 15px;
    padding: 20px;
  }
}

@media (max-width: 380px) {
  #enrolled-courses-list {
    grid-template-columns: 1fr;
  }
}

#toggle-courses-btn {
  background-color: #4a90e2;
  color: white;
  border: none;
  border-radius: 30px;
  padding: 14px 28px;
  font-size: 1.1em;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  user-select: none;
  box-shadow: 0 4px 6px rgba(74, 144, 226, 0.4);
}

#toggle-courses-btn:hover,
#toggle-courses-btn:focus {
  background-color: #357ab8;
  outline: none;
  box-shadow: 0 6px 10px rgba(53, 122, 184, 0.6);
}

#toggle-courses-btn:focus-visible {
  outline: 3px solid #9ec6ff;
  outline-offset: 3px;
}

.back-home-link {
  text-align: center;
  margin-top: 15px;
}
.back-home-link a {
  color: #4a90e2;
  text-decoration: none;
}
.back-home-link a:hover {
  text-decoration: underline;
}