* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-bg: #3f0e40;
  --sidebar-hover: #350d36;
  --sidebar-active: #1164a3;
  --sidebar-text: #cfc3cf;
  --sidebar-text-strong: #ffffff;
  --accent: #007a5a;
  --border: #e0e0e0;
  --text: #1d1c1d;
  --text-muted: #616061;
  --bg: #ffffff;
  --hover-bg: #f8f8f8;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
}

.hidden { display: none !important; }

/* ---------- ログイン ---------- */
.login-screen {
  height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3f0e40 0%, #611f69 100%);
}
.login-card {
  background: #fff; padding: 48px 40px; border-radius: 16px; text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.3); width: 360px;
}
.login-logo { font-size: 56px; }
.login-card h1 { margin: 12px 0 4px; font-size: 26px; }
.login-sub { color: var(--text-muted); margin-bottom: 24px; font-size: 14px; }
.login-card input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 15px; margin-bottom: 14px;
}
.login-card input:focus { outline: 2px solid var(--sidebar-active); border-color: transparent; }
.login-card button {
  width: 100%; padding: 12px; background: var(--accent); color: #fff; border: none;
  border-radius: 8px; font-size: 15px; font-weight: 700; cursor: pointer;
}
.login-card button:hover { background: #148567; }
.auth-error { background: #fde8e8; color: #b71c1c; padding: 10px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 12px; }
.auth-toggle { margin-top: 16px; font-size: 13px; color: var(--text-muted); }
.auth-toggle a { color: var(--sidebar-active); cursor: pointer; font-weight: 700; margin-left: 4px; }
.auth-toggle a:hover { text-decoration: underline; }

/* ---------- レイアウト ---------- */
.app { display: flex; height: 100vh; }

/* ---------- 左アイコンレール ---------- */
.rail {
  width: 68px; background: var(--rail-bg, #2c0a2d); flex-shrink: 0; display: flex; flex-direction: column;
  justify-content: space-between; align-items: center; padding: 10px 0;
}
.rail-top { display: flex; flex-direction: column; gap: 4px; width: 100%; align-items: center; }
.rail-bottom { display: flex; flex-direction: column; gap: 12px; align-items: center; padding-bottom: 4px; }
.rail-btn {
  width: 54px; background: transparent; border: none; color: rgba(255,255,255,.72); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 8px 0; border-radius: 10px; font-size: 10px;
}
.rail-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
.rail-btn.active { background: rgba(255,255,255,.2); color: #fff; }
.rail-ico { display: inline-flex; align-items: center; }
.rail-label { line-height: 1; }
.rail-icon-btn {
  width: 40px; height: 40px; border-radius: 50%; background: transparent; border: none; cursor: pointer;
  color: rgba(255,255,255,.8); display: inline-flex; align-items: center; justify-content: center;
}
.rail-icon-btn:hover { background: rgba(255,255,255,.15); color: #fff; }
.rail-avatar { position: relative; background: transparent; border: none; cursor: pointer; padding: 0; }
.rail-avatar .avatar { width: 34px; height: 34px; border-radius: 8px; }

/* ---------- DMディレクトリ / ファイル ---------- */
.dir-section-title { padding: 16px 20px 6px; font-weight: 700; color: var(--text-muted); font-size: 13px; }
.dir-row { display: flex; align-items: center; gap: 10px; padding: 8px 20px; cursor: pointer; }
.dir-row:hover { background: var(--hover-bg); }
.dir-name { font-size: 15px; }
.files-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; padding: 16px 20px; }
.file-card { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.file-thumb { height: 120px; display: flex; align-items: center; justify-content: center; background: var(--hover-bg); color: var(--text-muted); text-decoration: none; overflow: hidden; }
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }
.file-info { display: flex; align-items: center; gap: 6px; padding: 8px 10px; }
.file-text { flex: 1; min-width: 0; }
.file-info .file-name { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-info .file-sub { font-size: 11px; color: var(--text-muted); }

/* ---------- サイドバー ---------- */
.sidebar {
  width: 260px; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; flex-shrink: 0; position: relative;
}
.workspace-header {
  padding: 14px 16px; font-weight: 800; font-size: 17px; color: var(--sidebar-text-strong);
  border-bottom: 1px solid rgba(255,255,255,.1); display: flex; align-items: center;
}
.search-box { padding: 10px 12px; }
.search-box input {
  width: 100%; padding: 8px 10px; border-radius: 6px; border: none;
  background: rgba(255,255,255,.12); color: #fff; font-size: 14px;
}
.search-box input::placeholder { color: rgba(255,255,255,.6); }
.sidebar-scroll { flex: 1; overflow-y: auto; }
.sidebar-section { padding: 8px 0; }
.sidebar-section-title {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 16px; font-size: 13px; font-weight: 700; color: var(--sidebar-text);
}
.add-btn {
  background: transparent; border: none; color: var(--sidebar-text);
  cursor: pointer; font-size: 18px; line-height: 1; width: 22px; height: 22px; border-radius: 4px;
}
.add-btn:hover { background: rgba(255,255,255,.15); color: #fff; }
.channel-list, .member-list { list-style: none; }
.channel-list li, .member-list li {
  padding: 6px 16px; cursor: pointer; font-size: 15px; display: flex; align-items: center; gap: 8px;
}
.channel-list li:hover, .member-list li:hover { background: var(--sidebar-hover); }
.channel-list li.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }
.channel-prefix { opacity: .8; }
.sidebar-footer {
  padding: 10px 16px; display: flex; align-items: center; gap: 10px; cursor: pointer;
  border-top: 1px solid rgba(255,255,255,.1); color: var(--sidebar-text-strong); font-size: 14px;
}
.sidebar-footer:hover { background: var(--sidebar-hover); }
.me-info { display: flex; flex-direction: column; line-height: 1.3; flex: 1; min-width: 0; }
.me-status { font-size: 11px; color: var(--sidebar-text); }
.me-gear { opacity: .7; }
.sidebar-footer:hover .me-gear { opacity: 1; }

/* プロフィールモーダル */
.profile-avatar-row { display: flex; align-items: center; gap: 16px; margin: 8px 0 4px; }
.profile-avatar-row .btn-cancel { padding: 8px 12px; margin-right: 6px; font-size: 13px; }
.profile-hint, .profile-notice { font-size: 12px; color: var(--text-muted); margin-top: 6px; }
.profile-notice a { color: var(--sidebar-active); cursor: pointer; font-weight: 700; }
.radio-row.column { flex-direction: column; gap: 6px; }

/* スレッド一覧カード */
.thread-card { border: 1px solid var(--border); border-radius: 10px; margin: 10px 16px; cursor: pointer; overflow: hidden; }
.thread-card:hover { background: var(--hover-bg); border-color: var(--sidebar-active); }
.thread-card-channel { font-size: 12px; font-weight: 700; color: var(--text-muted); padding: 8px 16px 0; }
.thread-card .message:hover { background: transparent; }
.thread-card .message-actions { display: none !important; }

.avatar {
  width: 32px; height: 32px; border-radius: 6px; display: inline-flex;
  align-items: center; justify-content: center; color: #fff; font-weight: 700;
  font-size: 14px; flex-shrink: 0; overflow: hidden;
}
.avatar.sm { width: 24px; height: 24px; font-size: 11px; border-radius: 4px; }
.avatar.lg { width: 72px; height: 72px; font-size: 30px; border-radius: 12px; }
.avatar-img { width: 100%; height: 100%; object-fit: cover; }

/* 在席インジケータ */
.avatar-wrap { position: relative; display: inline-flex; flex-shrink: 0; }
.presence-dot {
  position: absolute; right: -2px; bottom: -2px; width: 11px; height: 11px; border-radius: 50%;
  border: 2px solid var(--sidebar-bg); background: #8a8a8a;
}
.presence-dot.sm { width: 9px; height: 9px; }
.presence-dot.on { background: #2ecc71; }
.presence-dot.away { background: #f1c40f; }
.presence-dot.off { background: transparent; border-color: #8a8a8a; }

/* ロゴ */
.logo-btn { background: transparent; border: none; padding: 0; margin-right: 8px; cursor: pointer; display: inline-flex; position: relative; border-radius: 6px; }
.workspace-logo { width: 26px; height: 26px; border-radius: 6px; vertical-align: middle; object-fit: cover; display: block; }
.logo-btn.editable::after {
  content: '✎'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.5); color: #fff; font-size: 13px; border-radius: 6px; opacity: 0; transition: opacity .15s;
}
.logo-btn.editable:hover::after { opacity: 1; }
.login-logo-img { width: 72px; height: 72px; border-radius: 16px; box-shadow: 0 4px 14px rgba(0,0,0,.12); }

/* クイックナビ */
.quick-nav { list-style: none; padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.quick-nav li { display: flex; align-items: center; gap: 10px; padding: 8px 16px; cursor: pointer; font-size: 14px; }
.quick-nav li:hover { background: var(--sidebar-hover); }
.quick-ico { font-size: 15px; }

/* ---------- メイン ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; position: relative; }
.channel-header {
  padding: 14px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center;
}
.channel-header-name { font-weight: 800; font-size: 17px; }
.channel-header-topic { color: var(--text-muted); font-size: 13px; margin-left: 12px; }

.messages { flex: 1; overflow-y: auto; padding: 16px 0; }
.message {
  display: flex; gap: 10px; padding: 6px 20px; position: relative;
}
.message:hover { background: var(--hover-bg); }
.message-body-wrap { flex: 1; min-width: 0; }
.message-head { display: flex; align-items: baseline; gap: 8px; }
.message-author { font-weight: 700; font-size: 15px; }
.message-time { font-size: 12px; color: var(--text-muted); }
.message-text { font-size: 15px; line-height: 1.46; white-space: pre-wrap; word-break: break-word; }

.attachments { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 8px; }
.attach-image img { max-width: 320px; max-height: 240px; border-radius: 8px; border: 1px solid var(--border); cursor: pointer; }
.attach-file {
  display: flex; align-items: center; gap: 4px; padding: 6px 8px 6px 12px; border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 14px; max-width: 320px;
}
.attach-file:hover { background: var(--hover-bg); }
.attach-file-main { display: flex; align-items: center; gap: 8px; text-decoration: none; color: inherit; min-width: 0; flex: 1; }
.attach-file .file-icon { font-size: 22px; }
.attach-file .file-meta { overflow: hidden; }
.attach-file .file-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.attach-file .file-size { font-size: 12px; color: var(--text-muted); }
.attach-dl {
  text-decoration: none; font-size: 16px; padding: 6px 8px; border-radius: 6px; color: var(--text-muted); flex-shrink: 0;
}
.attach-dl:hover { background: #e8e8e8; color: var(--text); }

/* 絵文字だけのメッセージは大きく表示 */
.message-text.big-emoji { font-size: 40px; line-height: 1.2; }

/* 削除済み・編集済み */
.message-text.deleted { color: var(--text-muted); font-style: italic; font-size: 14px; }
.edited-mark { color: var(--text-muted); font-size: 11px; }

/* メンション */
.mention-me { background: #fffbe6; }
.mention-me:hover { background: #fff6d0; }
.mention { background: #e8f2ff; color: #1264a3; border-radius: 3px; padding: 0 2px; font-weight: 600; }
.mention-self { background: #ffe9b3; color: #8a6d00; }

/* 既読ラベル */
.read-label { font-size: 11px; color: var(--text-muted); margin-top: 3px; }

/* メッセージ編集ボックス */
.edit-box { margin-top: 4px; }
.edit-textarea {
  width: 100%; border: 1px solid var(--sidebar-active); border-radius: 8px; padding: 8px;
  font-size: 15px; font-family: inherit; resize: vertical; min-height: 60px;
}
.edit-actions { display: flex; gap: 8px; margin-top: 6px; }
.edit-actions button { padding: 6px 14px; border-radius: 6px; border: none; cursor: pointer; font-weight: 700; font-size: 13px; }

/* 絵文字ピッカー（入力欄挿入用） */
.emoji-picker {
  position: absolute; bottom: 44px; right: 60px; width: 280px; background: #fff;
  border: 1px solid var(--border); border-radius: 10px; padding: 8px; display: flex; flex-wrap: wrap;
  gap: 2px; box-shadow: 0 4px 16px rgba(0,0,0,.15); z-index: 60;
}
.emoji-picker button { border: none; background: transparent; font-size: 22px; cursor: pointer; padding: 4px; border-radius: 6px; }
.emoji-picker button:hover { background: var(--hover-bg); }

/* リアクション選択popover */
.emoji-popover {
  position: absolute; background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 6px; display: flex; gap: 4px; box-shadow: 0 2px 10px rgba(0,0,0,.15); z-index: 50; top: 28px; right: 0;
}
.emoji-popover button { border: none; background: transparent; font-size: 20px; cursor: pointer; padding: 2px; }
.emoji-popover button:hover { background: var(--hover-bg); border-radius: 4px; }

/* メンション補完メニュー */
.mention-menu {
  position: absolute; bottom: 52px; left: 40px; background: #fff; border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 4px 16px rgba(0,0,0,.15); z-index: 60; min-width: 200px; overflow: hidden;
}
.mention-item { display: flex; align-items: center; gap: 8px; padding: 8px 12px; cursor: pointer; font-size: 14px; }
.mention-item:hover { background: var(--sidebar-active); color: #fff; }

/* リアクション */
.reactions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.reaction {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 12px;
  border: 1px solid var(--border); background: #fff; font-size: 13px; cursor: pointer;
}
.reaction.mine { background: #e8f5fd; border-color: var(--sidebar-active); }
.reaction:hover { border-color: var(--sidebar-active); }

/* メッセージ操作（Slack風フローティングツールバー） */
.message-actions {
  position: absolute; top: -16px; right: 16px; display: none; gap: 1px;
  background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 3px;
  box-shadow: 0 3px 10px rgba(0,0,0,.14); z-index: 5;
}
.message:hover { background: #f6f8fc; }
.message:hover .message-actions { display: flex; }
.message-actions button {
  border: none; background: transparent; cursor: pointer; font-size: 17px;
  padding: 5px 7px; border-radius: 6px; line-height: 1;
}
.message-actions button:hover { background: #eef1f6; transform: translateY(-1px); }

.thread-link {
  margin-top: 4px; display: inline-flex; align-items: center; gap: 6px; font-size: 13px;
  color: var(--sidebar-active); cursor: pointer; font-weight: 600;
}
.thread-link:hover { text-decoration: underline; }

/* ---------- コンポーザー ---------- */
.composer { padding: 0 20px 20px; }
.composer-row {
  display: flex; align-items: flex-end; gap: 8px; border: 1px solid var(--border);
  border-radius: 10px; padding: 8px; background: #fff;
}
.composer-row:focus-within { border-color: var(--sidebar-active); }
.composer-input, #composer-input, #thread-input {
  flex: 1; border: none; resize: none; font-size: 15px; font-family: inherit;
  max-height: 160px; outline: none; line-height: 1.4;
  background: transparent; color: var(--text);
}
#composer-input::placeholder, #thread-input::placeholder { color: var(--text-muted); }
.attach-btn { background: transparent; border: none; font-size: 20px; cursor: pointer; padding: 4px; }
.send-btn {
  background: var(--accent); color: #fff; border: none; padding: 8px 16px; border-radius: 8px;
  font-weight: 700; cursor: pointer; font-size: 14px;
}
.send-btn:hover { background: #148567; }
.send-btn:disabled { background: #ccc; cursor: default; }

/* 書式ツールバー */
.format-toolbar {
  display: flex; align-items: center; gap: 2px; padding: 4px 6px; margin-bottom: 6px;
  border: 1px solid var(--border); border-radius: 8px; background: #fafafa; flex-wrap: wrap;
}
.format-toolbar button {
  border: none; background: transparent; cursor: pointer; font-size: 14px; min-width: 28px; height: 28px;
  border-radius: 5px; color: var(--text); display: inline-flex; align-items: center; justify-content: center;
}
.format-toolbar button:hover { background: #ececec; }
.format-toolbar .tb-sep { width: 1px; height: 18px; background: var(--border); margin: 0 4px; }

/* Markdown表示 */
.message-text strong { font-weight: 800; }
.message-text em { font-style: italic; }
.message-text del { opacity: .7; }
.md-code { background: #f3e8e6; color: #c8352f; padding: 1px 5px; border-radius: 4px; font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 90%; }
.md-codeblock {
  background: #f6f8fa; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  margin: 4px 0; overflow-x: auto; font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 13px;
  white-space: pre; line-height: 1.5;
}
.md-list { margin: 4px 0 4px 22px; }
.md-list li { margin: 2px 0; }
.md-quote { border-left: 3px solid #c9c9c9; padding: 2px 0 2px 12px; margin: 4px 0; color: var(--text-muted); }
.md-link { color: var(--sidebar-active); }

.attach-preview { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.attach-preview-item {
  display: flex; align-items: center; gap: 6px; padding: 6px 10px; background: var(--hover-bg);
  border: 1px solid var(--border); border-radius: 8px; font-size: 13px;
}
.attach-preview-item button { border: none; background: transparent; cursor: pointer; color: var(--text-muted); }
.attach-preview-item img { width: 40px; height: 40px; object-fit: cover; border-radius: 4px; }

.typing-indicator { height: 20px; padding: 0 20px; font-size: 12px; color: var(--text-muted); font-style: italic; }

/* ---------- スレッドパネル ---------- */
.thread-panel {
  width: 400px; border-left: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; position: relative;
}
.thread-header {
  padding: 14px 20px; border-bottom: 1px solid var(--border); display: flex;
  justify-content: space-between; align-items: center; font-weight: 800;
}
.thread-parent { border-bottom: 1px solid var(--border); }
.icon-btn { background: transparent; border: none; font-size: 18px; cursor: pointer; color: var(--text-muted); }
.thread-messages { flex: 1; }

/* ---------- モーダル ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex;
  align-items: center; justify-content: center; z-index: 100;
}
.modal { background: #fff; border-radius: 12px; padding: 24px; width: 420px; max-width: 90vw; }
.modal h2 { margin-bottom: 16px; font-size: 20px; }
.modal label { display: block; font-size: 13px; font-weight: 700; margin: 12px 0 4px; }
.modal input[type="text"], .modal textarea {
  width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit;
}
.modal .member-picker { max-height: 180px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; padding: 8px; margin-top: 4px; }
.modal .member-picker label { display: flex; align-items: center; gap: 8px; margin: 0; padding: 6px; font-weight: 400; cursor: pointer; }
.modal .member-picker label:hover { background: var(--hover-bg); border-radius: 6px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.modal-actions button { padding: 10px 18px; border-radius: 8px; border: none; cursor: pointer; font-weight: 700; font-size: 14px; }
.btn-cancel { background: #eee; color: var(--text); }
.btn-primary { background: var(--accent); color: #fff; }
.radio-row { display: flex; gap: 16px; margin-top: 6px; }
.radio-row label { display: flex; align-items: center; gap: 6px; font-weight: 400; margin: 0; }

.search-results-title { padding: 12px 20px; font-weight: 700; border-bottom: 1px solid var(--border); }
.search-result-channel { font-size: 12px; color: var(--text-muted); }

/* ==================== SVGアイコン共通 ==================== */
.ic { display: block; }
.attach-btn { display: inline-flex; align-items: center; justify-content: center; color: var(--text-muted); }
.attach-btn:hover { color: var(--text); }
.channel-prefix { display: inline-flex; align-items: center; opacity: .8; }
.channel-list li, .quick-nav li { align-items: center; }
.quick-ico { display: inline-flex; align-items: center; }
.search-box { display: flex; align-items: center; position: relative; }
.search-ico { position: absolute; left: 22px; color: rgba(255,255,255,.6); display: inline-flex; pointer-events: none; }
.search-box input { padding-left: 30px; }
.me-gear { display: inline-flex; }
.format-toolbar button { color: var(--text-muted); }
.format-toolbar button:hover { color: var(--text); }
.message-actions button { color: var(--text-muted); }
.message-actions .bm-btn.on { color: var(--accent); }
.channel-header-name { display: inline-flex; align-items: center; gap: 4px; }

/* チャンネルヘッダーのアクション */
.channel-header { justify-content: space-between; }
.channel-header-actions { display: flex; gap: 6px; }
.header-btn {
  display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--border); background: #fff;
  border-radius: 8px; padding: 5px 10px; cursor: pointer; font-size: 13px; font-weight: 700; color: var(--text-muted);
}
.header-btn:hover { background: var(--hover-bg); color: var(--text); }

/* 未読チャンネル */
.channel-list li.unread { font-weight: 800; color: #fff; }
.channel-list li { display: flex; align-items: center; }
.unread-badge {
  margin-left: auto; background: #cd2553; color: #fff; font-size: 11px; font-weight: 700;
  min-width: 18px; height: 18px; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; padding: 0 5px;
}

/* 通知許可バナー */
.notify-prompt {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 360;
  background: var(--sidebar-active); color: #fff; padding: 10px 14px; border-radius: 12px;
  display: flex; align-items: center; gap: 12px; box-shadow: 0 6px 20px rgba(0,0,0,.3); font-size: 14px;
}
.notify-prompt span { display: inline-flex; align-items: center; gap: 6px; }
.notify-prompt button { border: none; border-radius: 8px; padding: 6px 12px; cursor: pointer; font-weight: 700; font-size: 13px; }
.np-yes { background: #fff; color: var(--sidebar-active); }
.np-no { background: rgba(255,255,255,.2); color: #fff; }

/* ピン留めバッジ */
.pin-badge { display: inline-flex; align-items: center; gap: 3px; font-size: 11px; color: #b26a00; font-weight: 700; }
.message.pinned { background: #fffdf5; }
.message.pinned:hover { background: #fff8e6; }
.pinned-back { color: var(--sidebar-active); cursor: pointer; font-weight: 600; padding: 12px 20px; font-size: 14px; }
.pinned-back:hover { text-decoration: underline; }

/* コンテキストメニュー */
.ctx-menu {
  position: fixed; z-index: 200; background: #fff; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 8px 28px rgba(0,0,0,.18); padding: 6px; min-width: 232px;
}
.ctx-item { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: 7px; cursor: pointer; font-size: 14px; color: var(--text); }
.ctx-item:hover { background: var(--sidebar-active); color: #fff; }
.ctx-item.danger { color: #c8352f; }
.ctx-item.danger:hover { background: #c8352f; color: #fff; }
.ctx-ico { display: inline-flex; align-items: center; color: currentColor; opacity: .85; }
.ctx-sep { height: 1px; background: var(--border); margin: 5px 6px; }

/* トースト */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 20px); background: #222; color: #fff;
  padding: 10px 18px; border-radius: 22px; font-size: 14px; z-index: 300; opacity: 0; transition: all .25s; box-shadow: 0 4px 16px rgba(0,0,0,.3);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 転送モーダル */
.forward-preview { background: var(--hover-bg); border-left: 3px solid var(--border); padding: 10px 12px; border-radius: 6px; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.modal select { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }

/* ==================== メニュー / ドロワー（モバイル） ==================== */
.menu-btn { display: none; margin-right: 10px; color: var(--text-muted); }
.channel-header-title { flex: 1; min-width: 0; }
.drawer-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 40; }

/* ==================== 幅リサイズハンドル ==================== */
.resize-handle { position: absolute; top: 0; bottom: 0; width: 6px; cursor: col-resize; z-index: 15; }
.resize-handle.resize-right { right: -3px; }
.resize-handle.resize-left { left: -3px; }
.resize-handle:hover { background: var(--sidebar-active); opacity: .4; }

/* ==================== 接続バナー ==================== */
.conn-banner {
  position: fixed; top: 0; left: 50%; transform: translate(-50%, -100%); background: #b23b3b; color: #fff;
  padding: 7px 18px; border-radius: 0 0 10px 10px; font-size: 13px; z-index: 400; transition: transform .25s;
}
.conn-banner.show { transform: translate(-50%, 0); }

/* ==================== 新着メッセージバナー ==================== */
.newmsg-banner {
  position: absolute; left: 50%; bottom: 96px; transform: translate(-50%, 20px); background: var(--sidebar-active); color: #fff;
  padding: 8px 16px; border-radius: 20px; font-size: 13px; font-weight: 700; cursor: pointer; z-index: 20;
  display: none; align-items: center; gap: 6px; box-shadow: 0 3px 12px rgba(0,0,0,.25);
}
.newmsg-banner.show { display: inline-flex; animation: pop-up .25s ease; }
@keyframes pop-up { from { transform: translate(-50%, 20px); opacity: 0; } to { transform: translate(-50%, 0); opacity: 1; } }

/* ==================== アプリ内通知バナー ==================== */
.notice-stack { position: fixed; top: 16px; right: 16px; z-index: 350; display: flex; flex-direction: column; gap: 10px; }
.notice-card {
  display: flex; align-items: flex-start; gap: 10px; width: 320px; max-width: 86vw; background: #fff; color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; box-shadow: 0 8px 28px rgba(0,0,0,.18);
  cursor: pointer; transform: translateX(120%); transition: transform .3s;
}
.notice-card.show { transform: translateX(0); }
.notice-card.mention { border-left: 4px solid #e8a200; }
.notice-text { flex: 1; min-width: 0; }
.notice-title { font-weight: 700; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.notice-body { font-size: 13px; color: var(--text-muted); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.notice-close { background: transparent; border: none; cursor: pointer; color: var(--text-muted); padding: 2px; }
.notice-close:hover { color: var(--text); }

/* ==================== テーマカラー・スウォッチ ==================== */
.swatch-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.swatch { width: 34px; height: 34px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; outline: 2px solid var(--border); outline-offset: 1px; }
.swatch.active { border-color: #fff; outline-color: var(--sidebar-active); outline-width: 3px; }

/* ==================== 画像ライトボックス ==================== */
.lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); z-index: 500; display: flex; align-items: center; justify-content: center; flex-direction: column; }
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: 6px; box-shadow: 0 8px 40px rgba(0,0,0,.5); }
.lightbox-bar { position: absolute; top: 0; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; }
.lightbox-dl { color: #fff; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; font-size: 14px; background: rgba(255,255,255,.15); padding: 8px 14px; border-radius: 8px; }
.lightbox-dl:hover { background: rgba(255,255,255,.25); }
.lightbox-close { background: rgba(255,255,255,.15); border: none; color: #fff; border-radius: 8px; padding: 8px; cursor: pointer; display: inline-flex; }
.lightbox-close:hover { background: rgba(255,255,255,.25); }

/* ==================== 管理者パネル ==================== */
.admin-users { max-height: 50vh; overflow-y: auto; margin-top: 8px; }
.admin-row { display: flex; align-items: center; gap: 10px; padding: 10px 4px; border-bottom: 1px solid var(--border); }
.admin-info { flex: 1; min-width: 0; }
.admin-name { font-weight: 700; font-size: 14px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.admin-email { font-size: 12px; color: var(--text-muted); }
.admin-badge { font-size: 11px; background: var(--sidebar-active); color: #fff; padding: 1px 7px; border-radius: 10px; }
.admin-badge.off { background: #b23b3b; }
.admin-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-actions .btn-cancel { padding: 6px 10px; font-size: 12px; }
.admin-you { font-size: 12px; color: var(--text-muted); }
.danger-btn { color: #c8352f !important; margin-right: auto; }
.danger-btn:hover { background: #fde8e8 !important; }

/* ==================== 検索絞り込み ==================== */
.search-filters { display: flex; gap: 8px; padding: 10px 20px; border-bottom: 1px solid var(--border); flex-wrap: wrap; align-items: center; }
.search-filters select, .search-filters input { padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; background: var(--bg); color: var(--text); }
.search-jump { cursor: pointer; }
.msg-highlight { animation: msg-flash 2s ease; }
@keyframes msg-flash { 0%, 40% { background: #fff3bf; } 100% { background: transparent; } }

/* ==================== ダークテーマ ==================== */
:root[data-theme="dark"] {
  color-scheme: dark;   /* フォーム部品(textarea/input/select)を暗色で描画 */
  --border: #3a3d42;
  --text: #e6e7e8;
  --text-muted: #9aa0a6;
  --bg: #1a1d21;
  --hover-bg: #23262b;
  --sidebar-bg: #15171a;
  --sidebar-hover: #23262b;
  --sidebar-text: #b9bdc4;
}
/* 入力欄まわりのダーク調整 */
:root[data-theme="dark"] .modal input,
:root[data-theme="dark"] .modal select,
:root[data-theme="dark"] .modal textarea,
:root[data-theme="dark"] .login-card input,
:root[data-theme="dark"] .edit-textarea { background: #1f2226; color: var(--text); border-color: var(--border); }
:root[data-theme="dark"] ::placeholder { color: #8b9198; }
:root[data-theme="dark"] .rail { background: #101113; }
:root[data-theme="dark"] textarea,
:root[data-theme="dark"] input,
:root[data-theme="dark"] select { color: var(--text); }
:root[data-theme="dark"] .composer-row,
:root[data-theme="dark"] .header-btn,
:root[data-theme="dark"] .modal,
:root[data-theme="dark"] .ctx-menu,
:root[data-theme="dark"] .emoji-picker,
:root[data-theme="dark"] .emoji-popover,
:root[data-theme="dark"] .mention-menu,
:root[data-theme="dark"] .reaction { background: #26292e; }
:root[data-theme="dark"] .format-toolbar { background: #202327; }
:root[data-theme="dark"] .message:hover { background: #202327; }
:root[data-theme="dark"] .message.pinned { background: #2a2618; }
:root[data-theme="dark"] .message.pinned:hover { background: #322d1c; }
:root[data-theme="dark"] .mention-me { background: #2c2a1a; }
:root[data-theme="dark"] .mention-me:hover { background: #34311d; }
:root[data-theme="dark"] .md-code { background: #3a2c2b; color: #ff9e94; }
:root[data-theme="dark"] .md-codeblock { background: #202327; }
:root[data-theme="dark"] .edit-textarea { background: #202327; }
:root[data-theme="dark"] .message-actions { background: #26292e; }
:root[data-theme="dark"] .message-actions button:hover { background: #34383e; }
:root[data-theme="dark"] .attach-dl:hover { background: #34383e; }
:root[data-theme="dark"] .mention { background: #1e3a5f; color: #8ec5ff; }
:root[data-theme="dark"] .reaction.mine { background: #16324a; }
:root[data-theme="dark"] .login-card { background: #23262b; }
:root[data-theme="dark"] .login-card h1 { color: var(--text); }
:root[data-theme="dark"] .btn-cancel { background: #3a3d42; color: var(--text); }
:root[data-theme="dark"] .search-box input { background: rgba(255,255,255,.1); }
:root[data-theme="dark"] .toast { background: #000; }

/* スクロールバー */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,.2); border-radius: 5px; }
:root[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); }
.sidebar-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,.2); }

/* ==================== モバイル対応 ==================== */
@media (max-width: 720px) {
  .menu-btn { display: inline-flex; }
  /* レール＋サイドバーを左からのドロワーに（閉時は完全に画面外） */
  .rail, .sidebar {
    position: fixed; top: 0; bottom: 0; left: 0; z-index: 50; height: 100%;
    transform: translateX(-100%); transition: transform .25s ease;
  }
  .sidebar { width: 252px !important; }
  .app.drawer-open .rail { transform: translateX(0); }
  .app.drawer-open .sidebar { transform: translateX(68px); }  /* レールの右隣に */
  .app.drawer-open .drawer-backdrop { display: block; }
  .resize-handle { display: none; }        /* モバイルはリサイズ無効 */

  .main { width: 100%; flex: 1; }
  /* スレッドは全画面 */
  .thread-panel { position: fixed; inset: 0; width: 100% !important; z-index: 60; background: var(--bg); }
  .notice-stack { left: 8px; right: 8px; }
  .notice-card { width: auto; }
  .files-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}