/* =====================================================
   MultiTranslate - デザインシステム
   ===================================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- CSS変数（デザイントークン） ---------- */
:root {
  /* カラーパレット */
  --primary-400: #6C63FF;
  --primary-500: #5B52F0;
  --primary-600: #4A41D9;
  --accent-400: #00D4AA;
  --accent-500: #00B894;

  /* グレースケール */
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --gray-950: #020617;

  /* 背景 */
  --bg-app: #0D1117;
  --bg-sidebar: #161B22;
  --bg-main: #0D1117;
  --bg-card: #1C2333;
  --bg-card-hover: #222D42;
  --bg-input: #1C2333;
  --bg-glass: rgba(255,255,255,0.04);
  --bg-glass-strong: rgba(255,255,255,0.08);

  /* テキスト */
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --text-muted: #6E7681;
  --text-accent: #6C63FF;

  /* ボーダー */
  --border-default: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --border-accent: rgba(108,99,255,0.4);

  /* バブル */
  --bubble-received-bg: #1C2333;
  --bubble-received-border: rgba(108,99,255,0.2);
  --bubble-sent-bg: linear-gradient(135deg, #5B52F0, #6C63FF);

  /* アニメーション */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* レイアウト */
  --sidebar-width: 300px;
  --ai-panel-width: 380px;
  --chat-footer-height: 160px;
  --header-height: 64px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* シャドウ */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px rgba(108,99,255,0.3);
}

/* ---------- リセット＆ベース ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow: hidden;
}
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: inherit; outline: none; }
a { color: var(--primary-400); text-decoration: none; }

/* ---------- スクロールバー ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--gray-700);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--gray-600); }

/* ==============================================
   アプリレイアウト
   ============================================== */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

.hidden { display: none !important; }

/* ==============================================
   サイドバー
   ============================================== */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 10;
  transition: transform var(--transition-normal);
}

/* ロゴ */
.sidebar-header {
  padding: 20px 16px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-default);
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-glow);
}
.logo-text { display: flex; flex-direction: column; }
.logo-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* 検索 */
.sidebar-search { padding: 12px 12px 8px; }
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: 10px;
  width: 15px;
  height: 15px;
  color: var(--text-muted);
}
.search-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  padding: 8px 12px 8px 34px;
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color var(--transition-fast);
}
.search-input:focus { border-color: var(--border-accent); }
.search-input::placeholder { color: var(--text-muted); }

/* 会社リスト */
.company-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.company-group { margin-bottom: 4px; }
.company-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px 6px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-radius: var(--radius-sm);
  margin: 0 8px;
  user-select: none;
}
.company-group-header:hover { background: var(--bg-glass-strong); }
.company-name-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.company-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.company-info { min-width: 0; }
.company-display-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.company-lang-badge {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-glass);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-top: 1px;
}
.company-chevron {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}
.company-group.open .company-chevron { transform: rotate(180deg); }

/* スレッドリスト */
.thread-list { padding: 2px 8px 4px 16px; }
.thread-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  position: relative;
  margin-bottom: 2px;
}
.thread-item:hover { background: var(--bg-glass-strong); }
.thread-item.active {
  background: linear-gradient(90deg, rgba(108,99,255,0.25), rgba(108,99,255,0.08));
  border-left: 3px solid var(--primary-400);
}
.thread-item.active .thread-name { color: var(--primary-400); }
.thread-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gray-600);
  flex-shrink: 0;
}
.thread-item.active .thread-icon { background: var(--primary-400); }
.thread-name {
  font-size: 12.5px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.thread-unread {
  font-size: 10px;
  background: var(--primary-500);
  color: #fff;
  border-radius: var(--radius-full);
  padding: 1px 6px;
  font-weight: 600;
}

/* サイドバーフッター */
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border-default);
  display: flex;
  gap: 8px;
}
.sidebar-footer-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 12px;
  transition: all var(--transition-fast);
}
.sidebar-footer-btn svg { width: 14px; height: 14px; }
.sidebar-footer-btn:hover {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* ==============================================
   メインエリア
   ============================================== */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  min-width: 0;
}

/* 空状態 */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-secondary);
  padding: 40px;
}
.empty-icon {
  font-size: 64px;
  filter: drop-shadow(0 0 20px rgba(108,99,255,0.4));
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.empty-state h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}
.empty-state p {
  font-size: 14px;
  text-align: center;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ==============================================
   チャットパネル
   ============================================== */
.chat-panel {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* チャットヘッダー */
.chat-header {
  background: rgba(22, 27, 34, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-default);
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
  z-index: 5;
}
.chat-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.chat-header-info { min-width: 0; }
.chat-company-name {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-thread-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.lang-selector-wrap, .tone-selector-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}
.lang-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}
.lang-selector {
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  padding: 5px 10px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.lang-selector:focus { border-color: var(--border-accent); }

/* メッセージエリア */
.message-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(108,99,255,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(0,212,170,0.03) 0%, transparent 60%),
    var(--bg-main);
}

/* ===== メッセージバブル ===== */
.message-group {
  display: flex;
  flex-direction: column;
  max-width: 70%;
  animation: slideIn 0.25s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 受信（左） */
.message-group.received { align-self: flex-start; }
.message-group.received .bubble-wrap {
  background: var(--bubble-received-bg);
  border: 1px solid var(--bubble-received-border);
  border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
}

/* 送信（右） */
.message-group.sent { align-self: flex-end; }
.message-group.sent .bubble-wrap {
  background: linear-gradient(135deg, #5B52F0, #6C63FF);
  border-radius: var(--radius-lg) 4px var(--radius-lg) var(--radius-lg);
  box-shadow: 0 4px 16px rgba(108,99,255,0.35);
}
.message-group.sent .msg-original { color: rgba(255,255,255,0.75); }
.message-group.sent .msg-divider { border-color: rgba(255,255,255,0.2); }
.message-group.sent .msg-translation { color: #fff; }
.message-group.sent .msg-meta { color: rgba(255,255,255,0.5); justify-content: flex-end; }

/* バブル本体 */
.bubble-wrap {
  padding: 14px 16px;
  position: relative;
}

/* チャネルバッジ */
.msg-channel-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-glass);
  border-radius: var(--radius-full);
  padding: 2px 8px;
  margin-bottom: 6px;
}

/* メール件名 */
.msg-mail-subject {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-400);
  margin-bottom: 8px;
}

/* メッセージ原文 */
.msg-original {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}
.msg-original.editable-active {
  background: rgba(108,99,255,0.1);
  border-radius: var(--radius-sm);
  padding: 6px;
  border: 1px solid var(--border-accent);
  outline: none;
  color: var(--text-primary);
}

/* 区切り線 */
.msg-divider {
  border: none;
  border-top: 1px solid var(--border-default);
  margin: 10px 0;
}

/* 翻訳文 */
.msg-translation {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

/* 翻訳中のローディング */
.msg-translation.translating {
  color: var(--text-muted);
  font-style: italic;
}
.translating-dots {
  display: inline-flex;
  gap: 3px;
  vertical-align: middle;
}
.translating-dots span {
  width: 5px;
  height: 5px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.2s ease-in-out infinite;
}
.translating-dots span:nth-child(2) { animation-delay: 0.2s; }
.translating-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-5px); }
}

/* メタ情報（時刻・ステータス） */
.msg-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
}
.msg-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: rgba(0,212,170,0.15);
  color: var(--accent-500);
  border-radius: var(--radius-full);
  padding: 1px 7px;
  font-size: 10px;
}
.msg-status-badge.draft {
  background: rgba(255,165,0,0.15);
  color: #FFB347;
}

/* メッセージアクション */
.msg-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.msg-action-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}
.msg-action-btn svg { width: 12px; height: 12px; }
.msg-action-btn:hover {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.msg-action-btn.primary {
  background: rgba(108,99,255,0.15);
  border-color: rgba(108,99,255,0.3);
  color: var(--primary-400);
}
.msg-action-btn.primary:hover {
  background: rgba(108,99,255,0.25);
}

/* 日付区切り */
.date-separator {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 11px;
}
.date-separator::before,
.date-separator::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-default);
}

/* ==============================================
   受信入力エリア
   ============================================== */
.receive-input-area {
  border-top: 1px solid var(--border-default);
  background: var(--bg-card);
  padding: 16px 20px;
  animation: slideUp 0.2s ease;
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.receive-input-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-400);
}
.receive-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13.5px;
  padding: 10px 14px;
  resize: vertical;
  min-height: 80px;
  max-height: 200px;
  line-height: 1.6;
  transition: border-color var(--transition-fast);
}
.receive-textarea:focus { border-color: var(--border-accent); }
.receive-textarea::placeholder { color: var(--text-muted); }
.receive-input-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.receive-channel {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}
.mail-subject-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  flex: 1;
}

/* ==============================================
   チャットフッター（送信エリア）
   ============================================== */
.chat-footer {
  background: rgba(22, 27, 34, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-default);
  padding: 12px 20px 16px;
  flex-shrink: 0;
}
.footer-actions-top {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}
.input-wrap {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.send-textarea {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 14px;
  padding: 12px 16px;
  resize: none;
  line-height: 1.6;
  transition: border-color var(--transition-fast);
  max-height: 150px;
}
.send-textarea:focus { border-color: var(--border-accent); }
.send-textarea::placeholder { color: var(--text-muted); }
.send-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

/* ==============================================
   ボタン
   ============================================== */
.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon:hover {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-icon-sm {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.btn-icon-sm svg { width: 14px; height: 14px; }
.btn-icon-sm:hover {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
}

.btn-ai {
  display: flex !important;
  align-items: center;
  gap: 6px;
  width: auto !important;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg, rgba(108,99,255,0.2), rgba(0,212,170,0.1)) !important;
  border-color: rgba(108,99,255,0.4) !important;
  color: var(--primary-400) !important;
}
.btn-ai:hover {
  background: linear-gradient(135deg, rgba(108,99,255,0.35), rgba(0,212,170,0.2)) !important;
  box-shadow: var(--shadow-glow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-400));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary svg { width: 14px; height: 14px; }
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(108,99,255,0.5);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary.btn-full { width: 100%; justify-content: center; }

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}
.btn-secondary svg { width: 14px; height: 14px; }
.btn-secondary:hover {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-large { padding: 14px 28px; font-size: 15px; font-weight: 600; }

.btn-translate {
  background: linear-gradient(135deg, rgba(0,212,170,0.2), rgba(0,212,170,0.1));
  border: 1px solid rgba(0,212,170,0.4);
  color: var(--accent-400);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn-translate svg { width: 14px; height: 14px; }
.btn-translate:hover {
  background: linear-gradient(135deg, rgba(0,212,170,0.3), rgba(0,212,170,0.2));
  box-shadow: 0 0 16px rgba(0,212,170,0.25);
}

.btn-send {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-400));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(108,99,255,0.4);
}
.btn-send svg { width: 15px; height: 15px; }
.btn-send:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(108,99,255,0.5);
}
.btn-send:active { transform: translateY(0); }

/* ==============================================
   フォーム要素
   ============================================== */
.select-sm {
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 8px;
  cursor: pointer;
}
.input-sm {
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 8px;
  flex: 1;
}
.input-sm::placeholder { color: var(--text-muted); }

/* ==============================================
   AIサイドパネル
   ============================================== */
.ai-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--ai-panel-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border-default);
  z-index: 100;
  display: flex;
  flex-direction: column;
  animation: slideFromRight 0.3s ease;
  box-shadow: -8px 0 32px rgba(0,0,0,0.5);
}
@keyframes slideFromRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
.ai-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border-default);
}
.ai-panel-header h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}
.ai-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ai-context-info {
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.ai-instruction-wrap label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.ai-instruction-area {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  padding: 10px 14px;
  resize: vertical;
  min-height: 80px;
  line-height: 1.6;
  transition: border-color var(--transition-fast);
}
.ai-instruction-area:focus { border-color: var(--border-accent); }
.ai-instruction-area::placeholder { color: var(--text-muted); }
.ai-draft-output {
  background: var(--bg-glass);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 14px;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.ai-draft-output h4 {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.ai-draft-text {
  font-size: 13.5px;
  color: var(--text-primary);
  line-height: 1.7;
  white-space: pre-wrap;
  margin-bottom: 12px;
}
.ai-draft-actions {
  display: flex;
  gap: 8px;
}

/* ==============================================
   モーダル
   ============================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.15s ease;
}
.modal-container {
  background: var(--bg-sidebar);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: scaleIn 0.2s ease;
}
@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.modal-sm { max-width: 400px; }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-default);
  flex-shrink: 0;
}
.modal-header h2 { font-size: 18px; font-weight: 700; }
.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}
.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--border-default);
  flex-shrink: 0;
}

/* 設定モーダル内 */
.settings-modal .modal-body { padding: 0; }
.settings-tabs, .dict-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-default);
  padding: 0 24px;
}
.tab-btn, .dict-tab-btn {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: -1px;
}
.tab-btn:hover, .dict-tab-btn:hover { color: var(--text-primary); }
.tab-btn.active, .dict-tab-btn.active {
  color: var(--primary-400);
  border-bottom-color: var(--primary-400);
}
.tab-content { display: none; }
.tab-content.active { display: block; }
.settings-section { padding: 20px 24px; }
.settings-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.settings-note {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* フォームグループ */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13.5px;
  padding: 9px 12px;
  transition: border-color var(--transition-fast);
}
.form-control:focus { border-color: var(--border-accent); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
.required { color: #F97171; }

/* 署名リスト */
.signature-list { margin-bottom: 12px; }
.sig-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 8px;
}
.sig-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.sig-item-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}
.sig-item-body {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.5;
}

/* 辞書 */
.dict-list { margin-bottom: 12px; }
.dict-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-default);
  font-size: 13px;
}
.dict-entry-ja { color: var(--text-secondary); flex: 1; }
.dict-arrow { color: var(--text-muted); }
.dict-entry-trans { color: var(--primary-400); flex: 1; }
.dict-add-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.dict-add-row span { color: var(--text-muted); font-size: 14px; }

/* 署名選択 */
.sig-select-list { display: flex; flex-direction: column; gap: 8px; }
.sig-select-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.sig-select-item:hover {
  border-color: var(--border-accent);
  background: var(--bg-glass-strong);
}
.sig-select-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-400);
  margin-bottom: 4px;
}
.sig-select-preview {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

/* ==============================================
   トースト通知
   ============================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 0.25s ease;
  min-width: 200px;
  max-width: 360px;
}
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
.toast.success { border-color: rgba(0,212,170,0.4); }
.toast.error { border-color: rgba(249,113,113,0.4); }
.toast.info { border-color: rgba(108,99,255,0.4); }
.toast-icon { font-size: 16px; }

/* ==============================================
   モバイル対応
   ============================================== */
.mobile-only { display: none !important; }

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 50;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .main-area { width: 100%; }
  .mobile-only { display: flex !important; }
  .lang-selector-wrap .lang-label,
  .tone-selector-wrap .lang-label { display: none; }
  .tone-selector-wrap { display: none; }
  .btn-ai span { display: none; }
}

@media (max-width: 600px) {
  .chat-header { padding: 0 12px; }
  .message-area { padding: 12px 14px; }
  .chat-footer { padding: 10px 12px 12px; }
  .message-group { max-width: 88%; }
  .ai-panel { width: 100%; }
  .lang-selector-wrap { display: none; }
}

/* モバイルサイドバーオーバーレイ */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 40;
}
.sidebar-overlay.active { display: block; }