/* ===== リセット & 変数 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg-primary:    #1e1f22;
  --bg-secondary:  #2b2d31;
  --bg-tertiary:   #313338;
  --bg-hover:      #35373c;
  --bg-active:     #404249;
  --bg-input:      #383a40;
  --bg-modal:      #2b2d31;

  --text-primary:  #dbdee1;
  --text-secondary:#949ba4;
  --text-muted:    #6d6f78;
  --text-link:     #00a8fc;

  --accent:        #5865f2;
  --accent-hover:  #4752c4;
  --danger:        #ed4245;
  --danger-hover:  #c03537;
  --success:       #23a55a;
  --warning:       #f0b232;

  --border:        #3f4147;
  --border-light:  #4e505a;

  --scrollbar-thumb: #1a1b1e;
  --scrollbar-track: #2b2d31;

  --sidebar-width: 240px;
  --rail-width:    80px;
  --thread-width:  360px;
  --panel-width:   320px;
  --header-height: 52px;
  --input-height:  68px;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
}

html, body {
  height: 100%;
  height: -webkit-fill-available;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow: hidden;
}

/* ===== スクロールバー ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ===== ログイン画面 ===== */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1a3a5c 0%, #1e4d7b 50%, #1a3a5c 100%);
}
.login-box {
  width: 100%;
  max-width: 400px;
  padding: 32px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 40px rgba(0,0,0,.25);
}
.login-logo { text-align: center; margin-bottom: 20px; }
.login-logo img { max-width: 240px; height: auto; }
.login-title { text-align: center; font-size: 24px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.login-subtitle { text-align: center; color: #666; margin-bottom: 24px; font-size: 13px; letter-spacing: 1px; }
.login-register-link { text-align: center; margin-top: 16px; color: #666; font-size: 13px; }
.login-register-link a { color: var(--accent); text-decoration: none; }

/* ログインボックス内は白背景用スタイル上書き */
.login-box .form-group label { color: #444; }
.login-box .form-group input {
  background: #f5f5f5; border-color: #ddd; color: #222;
}
.login-box .form-group input:focus { border-color: var(--accent); background: #fff; }
.login-box .form-error { color: var(--danger); }
.login-register-link a:hover { text-decoration: underline; }

/* ===== フォーム ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .5px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 14px; font-family: var(--font);
  outline: none; transition: border-color .15s;
}
.form-group input:focus, .form-group select:focus { border-color: var(--accent); }
.form-group select option { background: var(--bg-secondary); }
.hint { font-size: 11px; font-weight: 400; text-transform: none; color: var(--text-muted); }
.form-error { color: var(--danger); font-size: 13px; padding: 8px 0; }

/* ===== ボタン ===== */
.btn-primary {
  padding: 10px 16px; background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: background .15s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  padding: 10px 16px; background: transparent; color: var(--text-primary);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; cursor: pointer; transition: background .15s;
}
.btn-secondary:hover { background: var(--bg-hover); }
.btn-danger {
  padding: 10px 16px; background: var(--danger); color: #fff;
  border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer; transition: background .15s;
}
.btn-danger:hover { background: var(--danger-hover); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.icon-btn {
  background: none; border: none; color: var(--text-secondary);
  cursor: pointer; padding: 4px 6px; border-radius: var(--radius-sm);
  font-size: 16px; line-height: 1; transition: color .15s, background .15s;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ===== アプリレイアウト ===== */
.app-layout {
  display: flex;
  height: 100vh;
  height: -webkit-fill-available;
  overflow: hidden;
}

/* ===== サーバーレール ===== */
.server-rail {
  width: var(--rail-width);
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 0;
  gap: 8px;
  flex-shrink: 0;
}
.server-icon {
  width: 48px; height: 48px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; color: var(--text-primary);
  cursor: pointer; transition: border-radius .15s, background .15s;
}
.server-icon:hover, .server-icon.active { background: var(--accent); border-radius: var(--radius); }
.server-divider { width: 32px; height: 2px; background: var(--border); border-radius: 1px; }

/* ===== チャンネルサイドバー ===== */
.channel-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.sidebar-header {
  height: var(--header-height);
  padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.sidebar-title { font-size: 15px; }

/* チャンネルリスト */
.channel-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}
.category-header {
  display: flex; align-items: center;
  padding: 16px 8px 4px 8px;
  color: var(--text-secondary);
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .5px;
  cursor: pointer;
}
.category-header:hover { color: var(--text-primary); }
.category-arrow { margin-right: 4px; transition: transform .15s; font-size: 10px; }
.category-arrow.collapsed { transform: rotate(-90deg); }

.channel-item {
  display: flex; align-items: center;
  padding: 4px 8px 4px 18px;
  margin: 1px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text-secondary);
  font-size: 15px; transition: background .1s, color .1s;
  position: relative;
}
.channel-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.channel-item.active { background: var(--bg-active); color: #fff; }
.channel-item.has-unread { color: var(--text-primary); font-weight: 600; }
.channel-icon { margin-right: 6px; color: var(--text-muted); font-size: 14px; }
.channel-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.unread-badge {
  background: var(--danger); color: #fff;
  border-radius: 10px; padding: 1px 6px;
  font-size: 11px; font-weight: 700; min-width: 18px; text-align: center;
}

/* DM セクション */
.dm-section {
  border-top: 1px solid var(--border);
  padding: 8px 0;
  max-height: 200px;
  overflow-y: auto;
}
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 8px 4px 16px;
  color: var(--text-secondary);
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .5px;
}
.dm-item {
  display: flex; align-items: center;
  padding: 4px 8px 4px 8px;
  margin: 1px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text-secondary);
  font-size: 14px; transition: background .1s, color .1s;
}
.dm-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.dm-item.active { background: var(--bg-active); color: #fff; }
.dm-item.has-unread { color: var(--text-primary); font-weight: 600; }

/* ユーザーバー */
.user-bar {
  height: 52px;
  background: var(--bg-primary);
  display: flex; align-items: center;
  padding: 0 8px;
  gap: 8px;
  flex-shrink: 0;
}
.user-bar-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.user-bar-info { flex: 1; overflow: hidden; }
.user-bar-name { font-size: 13px; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-bar-status { font-size: 11px; color: var(--success); }

/* ===== メインコンテンツ ===== */
.main-content {
  flex: 1;
  background: var(--bg-tertiary);
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

/* チャンネルヘッダー */
.channel-header {
  height: var(--header-height);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  background: var(--bg-tertiary);
}
.channel-header-left { display: flex; align-items: center; gap: 8px; min-width: 0; }
.channel-header-icon { color: var(--text-muted); font-size: 18px; }
.channel-header-name { font-weight: 700; font-size: 15px; color: #fff; white-space: nowrap; }
.channel-header-desc { color: var(--text-secondary); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.channel-header-right { display: flex; gap: 4px; flex-shrink: 0; }
.header-btn { font-size: 18px; }

/* メッセージエリア */
.messages-area {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.messages-list {
  padding: 16px 16px 8px;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  justify-content: flex-end;
}
.messages-placeholder {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 15px;
}

/* メッセージグループ */
.msg-group {
  display: flex;
  gap: 12px;
  padding: 2px 0;
  position: relative;
}
.msg-group:hover { background: rgba(0,0,0,.06); border-radius: var(--radius-sm); }
.msg-group.msg-continued { padding-top: 1px; }

.msg-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
  flex-shrink: 0; margin-top: 2px;
  cursor: pointer;
}
.msg-avatar.continued { visibility: hidden; }

.msg-body { flex: 1; min-width: 0; }
.msg-header { display: flex; align-items: baseline; gap: 8px; margin-bottom: 2px; }
.msg-author { font-weight: 600; font-size: 15px; cursor: pointer; }
.msg-author:hover { text-decoration: underline; }
.msg-time { font-size: 11px; color: var(--text-muted); }
.msg-content { color: var(--text-primary); line-height: 1.5; word-break: break-word; white-space: pre-wrap; }
.msg-content.edited::after { content: ' (編集済)'; font-size: 11px; color: var(--text-muted); }

/* コードブロック */
.msg-content code {
  font-family: var(--font-mono); font-size: 13px;
  background: var(--bg-primary); padding: 2px 5px;
  border-radius: 3px; color: #e06c75;
}
.msg-content pre {
  background: var(--bg-primary); border-radius: var(--radius-sm);
  padding: 12px; overflow-x: auto; margin: 4px 0;
}
.msg-content pre code { background: none; padding: 0; color: var(--text-primary); }

/* メンション */
.mention {
  background: rgba(88,101,242,.3); color: #c9cdfb;
  border-radius: 3px; padding: 0 3px;
  font-weight: 600; cursor: pointer;
}

/* リアクション */
.msg-reactions { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.reaction-chip {
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(88,101,242,.15); border: 1px solid rgba(88,101,242,.4);
  border-radius: 12px; padding: 2px 8px;
  cursor: pointer; font-size: 13px; transition: background .1s;
}
.reaction-chip:hover { background: rgba(88,101,242,.3); }
.reaction-chip.reacted { background: rgba(88,101,242,.4); border-color: var(--accent); }
.reaction-count { font-size: 12px; color: var(--text-secondary); font-weight: 600; }

/* スレッドプレビュー */
.thread-preview {
  display: flex; align-items: center; gap: 6px;
  margin-top: 4px; padding: 4px 8px;
  background: var(--bg-hover); border-radius: var(--radius-sm);
  cursor: pointer; font-size: 13px; color: var(--text-link);
  border-left: 2px solid var(--accent);
  max-width: 400px;
}
.thread-preview:hover { background: var(--bg-active); }

/* メッセージアクションバー */
.msg-actions {
  position: absolute; right: 8px; top: -16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: none; gap: 2px; padding: 4px;
  z-index: 10;
}
.msg-group:hover .msg-actions { display: flex; }
.msg-action-btn {
  padding: 4px 8px; border-radius: var(--radius-sm);
  font-size: 14px; cursor: pointer;
  background: none; border: none; color: var(--text-secondary);
  transition: background .1s, color .1s;
}
.msg-action-btn:hover { background: var(--bg-hover); color: var(--text-primary); }

/* 添付ファイル */
.msg-attachments { margin-top: 4px; display: flex; flex-wrap: wrap; gap: 8px; }
.attachment-item {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-secondary); border-radius: var(--radius-sm);
  padding: 8px 12px; cursor: pointer; max-width: 300px;
  border: 1px solid var(--border);
}
.attachment-item:hover { border-color: var(--accent); }
.attachment-icon { font-size: 24px; }
.attachment-info { overflow: hidden; }
.attachment-name { font-size: 13px; color: var(--text-link); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.attachment-size { font-size: 11px; color: var(--text-muted); }
.attachment-image { max-width: 400px; max-height: 300px; border-radius: var(--radius-sm); cursor: pointer; }

/* 日付区切り */
.date-divider {
  display: flex; align-items: center; gap: 8px;
  margin: 16px 0; color: var(--text-muted); font-size: 12px;
}
.date-divider::before, .date-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ===== 入力エリア ===== */
.input-area {
  padding: 0 16px 16px;
  flex-shrink: 0;
}
.reply-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 13px; color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.input-wrapper {
  display: flex; align-items: flex-end;
  background: var(--bg-input);
  border-radius: var(--radius);
  padding: 8px 8px 8px 12px;
  gap: 8px;
  min-height: 44px;
}
.message-input {
  flex: 1; outline: none;
  color: var(--text-primary); font-size: 15px;
  line-height: 1.5; max-height: 200px; overflow-y: auto;
  font-family: var(--font);
}
.message-input:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted); pointer-events: none;
}
.message-input br:only-child { display: none; }

.emoji-btn { font-size: 20px; }
.send-btn {
  background: var(--accent); border: none; color: #fff;
  border-radius: var(--radius-sm); padding: 6px 10px;
  cursor: pointer; font-size: 16px; transition: background .15s;
  flex-shrink: 0;
}
.send-btn:hover { background: var(--accent-hover); }
.file-preview {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px; background: var(--bg-secondary);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: 13px; color: var(--text-secondary);
}

/* メンション候補 */
.mention-suggestions {
  position: absolute; bottom: 100%; left: 0; right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden; z-index: 100;
  box-shadow: 0 -4px 16px rgba(0,0,0,.4);
  max-height: 200px; overflow-y: auto;
}
.mention-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; cursor: pointer;
  transition: background .1s;
}
.mention-item:hover, .mention-item.selected { background: var(--bg-hover); }
.mention-avatar {
  width: 24px; height: 24px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; flex-shrink: 0;
}
.mention-name { font-size: 14px; font-weight: 600; }
.mention-display { font-size: 12px; color: var(--text-secondary); }

/* ===== スレッドパネル ===== */
.thread-panel, .search-panel, .bookmarks-panel, .members-panel {
  width: var(--thread-width);
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}
.search-panel, .bookmarks-panel, .members-panel { width: var(--panel-width); }
.thread-panel-header, .panel-header {
  height: var(--header-height);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 700; flex-shrink: 0;
}
.thread-messages {
  flex: 1; overflow-y: auto; padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.thread-input-wrapper {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex; gap: 8px; align-items: flex-end;
}
.thread-input-wrapper .message-input {
  background: var(--bg-input); border-radius: var(--radius-sm);
  padding: 8px 12px; max-height: 120px;
}

/* ===== 検索・ブックマーク・メンバーパネル ===== */
.search-form { padding: 12px 16px; display: flex; gap: 8px; border-bottom: 1px solid var(--border); }
.search-input-field {
  flex: 1; padding: 8px 12px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 14px; outline: none;
}
.search-input-field:focus { border-color: var(--accent); }
.search-results, .bookmarks-list, .members-list { flex: 1; overflow-y: auto; padding: 8px; }

.search-result-item, .bookmark-item {
  padding: 10px 12px; border-radius: var(--radius-sm);
  cursor: pointer; margin-bottom: 4px;
  border-left: 3px solid transparent;
  transition: background .1s;
}
.search-result-item:hover, .bookmark-item:hover { background: var(--bg-hover); border-left-color: var(--accent); }
.result-channel { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; }
.result-content { font-size: 13px; color: var(--text-primary); }
.result-meta { font-size: 11px; color: var(--text-secondary); margin-top: 4px; }

.member-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  cursor: pointer; transition: background .1s;
}
.member-item:hover { background: var(--bg-hover); }
.member-avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.member-info { flex: 1; }
.member-name { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.member-username { font-size: 12px; color: var(--text-secondary); }
.member-badge { font-size: 11px; background: var(--accent); color: #fff; padding: 1px 6px; border-radius: 10px; }

/* ===== コンテキストメニュー ===== */
.context-menu {
  position: fixed; z-index: 1000;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px; min-width: 160px;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
}
.context-item {
  padding: 8px 12px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 14px; color: var(--text-primary);
  transition: background .1s;
}
.context-item:hover { background: var(--bg-hover); }
.context-danger { color: var(--danger); }
.context-danger:hover { background: rgba(237,66,69,.15); }

/* ===== 絵文字ピッカー ===== */
.emoji-picker {
  position: fixed; z-index: 1000;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
  width: 300px;
}
.emoji-search input {
  width: 100%; padding: 6px 10px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 13px; outline: none; margin-bottom: 8px;
}
.emoji-grid {
  display: grid; grid-template-columns: repeat(8, 1fr);
  gap: 2px; max-height: 240px; overflow-y: auto;
}
.emoji-btn-item {
  padding: 4px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 20px; text-align: center;
  transition: background .1s; background: none; border: none;
}
.emoji-btn-item:hover { background: var(--bg-hover); }

/* ===== モーダル ===== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center;
}
.modal {
  background: var(--bg-modal);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 440px;
  box-shadow: 0 8px 32px rgba(0,0,0,.6);
  overflow: hidden;
}
.modal-wide { max-width: 640px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-body { padding: 20px; }
.modal-footer {
  display: flex; gap: 8px; align-items: center;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}

/* 管理タブ */
.admin-tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.admin-tab {
  padding: 8px 16px; background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--text-secondary); cursor: pointer; font-size: 14px; margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.admin-tab.active { color: var(--text-primary); border-bottom-color: var(--accent); }
.admin-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; max-height: 360px; overflow-y: auto; }
.admin-user-row, .admin-invite-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}
.admin-user-info { flex: 1; }
.admin-user-name { font-size: 14px; font-weight: 600; }
.admin-user-sub { font-size: 12px; color: var(--text-secondary); }
.invite-code { font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--accent); }
.invite-meta { font-size: 12px; color: var(--text-secondary); }

/* ===== トースト通知 ===== */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 2000; pointer-events: none;
}
.toast {
  padding: 12px 16px; border-radius: var(--radius);
  background: var(--bg-secondary); border: 1px solid var(--border);
  color: var(--text-primary); font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,.4);
  animation: toast-in .2s ease; pointer-events: all;
  display: flex; align-items: center; gap: 8px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.info    { border-left: 3px solid var(--accent); }
@keyframes toast-in { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-out { from { transform: translateX(0); opacity: 1; } to { transform: translateX(120%); opacity: 0; } }

/* ===== ローディング ===== */
.loading { display: flex; align-items: center; justify-content: center; padding: 32px; color: var(--text-muted); gap: 8px; }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== ハイライト検索 ===== */
mark { background: rgba(240,178,50,.3); color: inherit; border-radius: 2px; }

/* ===== ハンバーガーボタン（PC では非表示） ===== */
#btn-sidebar-toggle { display: none; }

/* ===== モバイル オーバーレイ ===== */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.5);
}
.sidebar-overlay.show { display: block; }

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  .server-rail { display: none; }

  #btn-sidebar-toggle { display: inline-flex; font-size: 20px; }

  .channel-sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    z-index: 300; width: 280px;
    transform: translateX(-100%);
    transition: transform .25s ease;
  }
  .channel-sidebar.open { transform: translateX(0); }

  /* モバイルでは全画面オーバーレイとして表示 */
  .thread-panel, .search-panel, .bookmarks-panel, .members-panel {
    position: fixed !important;
    inset: 0 !important;
    width: 100% !important;
    z-index: 400;
    border-left: none !important;
  }

  .channel-header-desc { display: none; }

  .input-area {
    padding: 0 8px env(safe-area-inset-bottom, 12px) 8px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    flex-shrink: 0;
  }
  .input-wrapper { padding: 8px 10px; min-height: 48px; }
  .message-input { font-size: 16px; min-height: 24px; }
  .send-btn { padding: 8px 14px; font-size: 18px; min-width: 44px; min-height: 44px; }
  .icon-btn { min-width: 36px; min-height: 36px; }

  .messages-area { -webkit-overflow-scrolling: touch; }
  .messages-list { padding: 8px 8px 4px; }
  .msg-group { gap: 8px; }
  .msg-avatar { width: 34px !important; height: 34px !important; }

  .modal { max-width: 96vw; }
  .modal-wide { max-width: 96vw; }

  /* パネルヘッダーを大きく */
  .thread-panel-header, .panel-header {
    height: 56px;
    font-size: 16px;
  }
  .thread-panel-header .icon-btn, .panel-header .icon-btn {
    font-size: 22px;
    min-width: 44px; min-height: 44px;
  }

  /* ユーザーバー セーフエリア */
  .user-bar {
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    height: auto; min-height: 52px;
  }
}