/* ==========================================================================
   OmniP2P Chat - 基本ライトモード & ダークモード切り替え対応スタイル
   絵文字不使用・すべてSVGアイコン
   ========================================================================== */

/* --- 基本ライトモード (デフォルト) --- */
:root,
body[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-sidebar: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #e2e8f0;
  --border-color: #cbd5e1;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary: #e2e8f0;
  --secondary-hover: #cbd5e1;
  --accent: #0284c7;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #10b981;
  --warning: #f59e0b;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --header-height: 64px;
}

/* --- ダークモード --- */
body[data-theme="dark"] {
  --bg-base: #0b0f19;
  --bg-surface: #111827;
  --bg-sidebar: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --border-color: rgba(255, 255, 255, 0.1);
  --border-focus: #3b82f6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary: #334155;
  --secondary-hover: #475569;
  --accent: #38bdf8;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-base);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease;
}

[data-lucide] {
  width: 18px;
  height: 18px;
  stroke-width: 2;
  vertical-align: middle;
  display: inline-block;
}

#app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* サイドバー */
#sidebar {
  width: 330px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.user-profile-widget {
  padding: 12px 18px;
  background-color: rgba(0, 0, 0, 0.02);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-name {
  font-weight: 600;
  font-size: 0.95rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.peer-id-container {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.peer-id-container code {
  background: var(--bg-surface);
  padding: 3px 6px;
  border-radius: var(--radius-sm);
  max-width: 125px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: monospace;
  font-weight: 600;
  color: var(--primary);
  border: 1px solid var(--border-color);
}

.new-chat-actions {
  padding: 14px 18px 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.button-row {
  display: flex;
  gap: 8px;
}

.flex-1 {
  flex: 1;
}

.sidebar-search {
  margin: 8px 18px;
  position: relative;
  display: flex;
  align-items: center;
}

.sidebar-search input {
  width: 100%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px 8px 34px;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
}

.sidebar-search .search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
}

.chat-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
}

.list-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 6px 8px;
}

.chat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.chat-list-item:hover {
  background-color: var(--bg-hover);
}

.chat-list-item.active {
  background-color: var(--bg-surface);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.chat-item-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.chat-item-title {
  font-size: 0.88rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
  background-color: var(--bg-sidebar);
}

.footer-button {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.15s;
}

.footer-button:hover {
  background-color: var(--bg-hover);
  border-color: var(--primary);
}

/* メインワークスペース */
#chat-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: var(--bg-base);
  position: relative;
}

#chat-header {
  height: var(--header-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-title-group h2 {
  font-size: 1.05rem;
  font-weight: 600;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
}

.badge.p2p {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.3);
}

.badge.ai {
  background: rgba(139, 92, 246, 0.1);
  color: #7c3aed;
  border-color: rgba(139, 92, 246, 0.3);
}

.connection-status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.connection-status-pill.connected {
  background-color: rgba(16, 185, 129, 0.12);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.3);
}

.connection-status-pill.disconnected {
  background-color: rgba(239, 68, 68, 0.12);
  color: #dc2626;
  border-color: rgba(239, 68, 68, 0.3);
}

/* メッセージエリア */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.chat-welcome-placeholder {
  margin: auto;
  text-align: center;
  color: var(--text-muted);
}

.welcome-icon {
  width: 48px;
  height: 48px;
  color: var(--border-color);
  margin-bottom: 12px;
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.message-bubble {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-bubble.self {
  align-self: flex-end;
}

.message-bubble.peer, .message-bubble.ai {
  align-self: flex-start;
}

.message-header-info {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.message-bubble.self .message-header-info {
  justify-content: flex-end;
}

.message-content {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.92rem;
  line-height: 1.6;
  word-break: break-word;
  box-shadow: var(--shadow-sm);
}

.message-bubble.self .message-content {
  background-color: var(--primary);
  color: #ffffff;
  border-bottom-right-radius: 2px;
}

.message-bubble.peer .message-content {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 2px;
}

.message-bubble.ai .message-content {
  background-color: rgba(139, 92, 246, 0.08);
  color: var(--text-main);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-bottom-left-radius: 2px;
}

.message-content pre {
  background-color: rgba(0, 0, 0, 0.1);
  padding: 10px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 8px 0;
  font-family: monospace;
}

.message-bubble.self .message-content pre {
  background-color: rgba(0, 0, 0, 0.25);
}

.message-content code {
  font-family: monospace;
  background-color: rgba(0, 0, 0, 0.06);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.85em;
}

.file-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: rgba(0, 0, 0, 0.05);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  margin-top: 8px;
  border: 1px solid var(--border-color);
}

.file-info {
  flex: 1;
  min-width: 0;
}

.file-title {
  font-weight: 600;
  font-size: 0.88rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 入力エリア */
#chat-input-area {
  padding: 16px 24px 24px;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
}

.warning-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #dc2626;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.warning-bar.info-bar {
  background-color: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--primary);
}

.input-form-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}

.attachment-preview {
  display: flex;
  gap: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
}

.preview-item {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-hover);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.input-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

.toolbar-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.toolbar-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

.input-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.input-row textarea {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.92rem;
  resize: none;
  max-height: 140px;
  line-height: 1.5;
}

/* ボタン汎用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--text-main);
  border-color: var(--border-color);
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--secondary-hover);
}

.btn-accent {
  background-color: var(--accent);
  color: #ffffff;
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.icon-button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.icon-button:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

/* ================= エクスプローラー風モーダル ================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.explorer-window {
  width: 92vw;
  max-width: 1240px;
  height: 84vh;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.explorer-window-header {
  padding: 12px 20px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.window-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
}

.explorer-tabs {
  display: flex;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  padding: 0 16px;
  gap: 8px;
}

.tab-button {
  background: none;
  border: none;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.explorer-toolbar {
  padding: 10px 18px;
  background-color: var(--bg-base);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-group.right-align {
  margin-left: auto;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box input {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 10px 6px 30px;
  color: var(--text-main);
  font-size: 0.82rem;
  width: 220px;
  outline: none;
}

.search-box [data-lucide] {
  position: absolute;
  left: 8px;
  color: var(--text-muted);
}

.control-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.control-item select {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 5px 8px;
  font-size: 0.82rem;
  outline: none;
}

.explorer-table-wrapper {
  flex: 1;
  overflow: auto;
}

.explorer-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  text-align: left;
}

.explorer-table th {
  background-color: var(--bg-sidebar);
  padding: 10px 14px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 5;
  white-space: nowrap;
}

.explorer-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
}

.explorer-table tr:hover {
  background-color: var(--bg-hover);
}

.explorer-table tr.group-row {
  background-color: var(--bg-sidebar);
  font-weight: 700;
  color: var(--primary);
}

.explorer-statusbar {
  padding: 8px 18px;
  background-color: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.statusbar-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.statusbar-item.right {
  margin-left: auto;
}

/* ダウンロード進捗バー */
.download-progress-container {
  padding: 12px 18px;
  background-color: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.progress-bar-bg {
  height: 8px;
  background-color: var(--bg-hover);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--primary);
  transition: width 0.2s ease;
}

/* ================= 参加ウィンドウ & QR ================= */
.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 520px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.modal-dialog-sm {
  max-width: 380px;
}

.modal-header {
  padding: 14px 18px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-footer {
  padding: 12px 18px;
  background-color: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.input-with-button {
  display: flex;
  gap: 8px;
}

.input-with-button input,
.form-group input,
.modal-body input {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text-main);
  font-size: 0.88rem;
  outline: none;
}

.separator-text {
  text-align: center;
  position: relative;
  margin: 10px 0;
}

.separator-text::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  border-top: 1px solid var(--border-color);
  z-index: 1;
}

.separator-text span {
  position: relative;
  z-index: 2;
  background-color: var(--bg-surface);
  padding: 0 10px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.qr-scanner-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.scanner-controls {
  display: flex;
  gap: 8px;
}

.qr-viewport {
  width: 100%;
  max-width: 320px;
  height: 240px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px dashed var(--primary);
  background: #000;
}

.scanner-message {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

.qrcode-wrapper {
  padding: 16px;
  background: #ffffff;
  border-radius: var(--radius-md);
  display: inline-block;
  box-shadow: var(--shadow-md);
  margin: 0 auto;
}

.qr-peer-code-box {
  margin-top: 12px;
  font-size: 0.85rem;
}

.qr-peer-code-box code {
  font-weight: 700;
  color: var(--primary);
  background: var(--bg-hover);
  padding: 3px 8px;
  border-radius: 4px;
}

.qr-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* 絵文字ピッカー */
.emoji-picker-popup {
  position: fixed;
  bottom: 90px;
  right: 30px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  z-index: 500;
  width: 280px;
}

.emoji-picker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}

.emoji-item {
  font-size: 1.3rem;
  cursor: pointer;
  text-align: center;
  padding: 4px;
  border-radius: var(--radius-sm);
}

.emoji-item:hover {
  background-color: var(--bg-hover);
}

.hidden {
  display: none !important;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}