/* === Chat Styles — Sessions, Messages, Input === */

/* === Sidebar === */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 1;
}
.sidebar-nav .btn-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
}
.sidebar-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.sidebar-avatar { margin-top: auto; }

/* === Session List === */
.session-list-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}
.session-list-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 12px;
}
.session-search {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  outline: none;
}
.session-search::placeholder { color: var(--text-tertiary); }

.session-list {
  flex: 1;
  overflow-y: auto;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  transition: background var(--transition);
  border-left: 3px solid transparent;
}
.session-item:hover { background: var(--hover); }
.session-item.active {
  background: var(--hover-strong);
  border-left-color: var(--accent);
}

.session-item-info {
  flex: 1;
  min-width: 0;
}
.session-item-name {
  font-size: var(--font-size-base);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.session-item-last-msg {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-item-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}
.session-item-time {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* === Session List Actions === */
.session-list-actions {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}
.session-list-actions .btn {
  flex: 1;
  font-size: var(--font-size-xs);
  padding: 8px 12px;
}

/* === Chat Header === */
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
  min-height: 60px;
}
.chat-header-info { flex: 1; min-width: 0; }
.chat-header-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-header-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}
.chat-header-actions {
  display: flex;
  gap: 4px;
}

/* === Message List === */
.message-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column-reverse;
}

.load-more {
  text-align: center;
  padding: 12px;
}
.load-more-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  transition: all var(--transition);
}
.load-more-btn:hover { background: var(--hover); color: var(--text-primary); }

/* === Message Bubbles === */
.message {
  display: flex;
  gap: 10px;
  margin-bottom: 4px;
  padding: 4px 0;
  position: relative;
}
.message:hover { background: var(--hover); border-radius: var(--radius); }

.message.self { flex-direction: row-reverse; }
.message.self .message-avatar { display: none; }

.message-body { max-width: 70%; min-width: 60px; }
.message.self .message-body { text-align: right; }

.message-sender {
  font-size: var(--font-size-xs);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 2px;
}
.message.self .message-sender { display: none; }

.message-bubble {
  display: inline-block;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  line-height: 1.5;
  word-break: break-word;
  text-align: left;
}

.message.self .message-bubble {
  background: var(--bubble-self);
  color: var(--bubble-self-text);
  border-bottom-right-radius: var(--radius-sm);
}
.message:not(.self) .message-bubble {
  background: var(--bubble-other);
  color: var(--bubble-other-text);
  border-bottom-left-radius: var(--radius-sm);
}

.message-reply-block {
  display: flex;
  gap: 0;
  margin-bottom: 6px;
  padding: 6px 10px;
  background: rgba(0,0,0,0.06);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: var(--font-size-xs);
  cursor: pointer;
}
[data-theme="dark"] .message-reply-block { background: rgba(255,255,255,0.06); }
.message-reply-sender { font-weight: 600; color: var(--accent); margin-right: 6px; }
.message-reply-text { color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* === Message Images === */
.message-image {
  max-width: 300px;
  max-height: 300px;
  border-radius: var(--radius);
  cursor: pointer;
  margin: 4px 0;
}

/* === Message Attachments === */
.message-file {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(0,0,0,0.04);
  border-radius: var(--radius);
  margin-top: 4px;
  font-size: var(--font-size-sm);
  cursor: pointer;
}
[data-theme="dark"] .message-file { background: rgba(255,255,255,0.06); }

/* === Message Link Preview === */
.link-preview-card {
  margin-top: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
}
.link-preview-card img {
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}
.link-preview-info {
  padding: 10px 14px;
}
.link-preview-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 2px;
}
.link-preview-desc {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}
.link-preview-site {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

/* === Message Meta === */
.message-meta {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.message.self .message-meta { justify-content: flex-end; }

/* === Message Reactions === */
.message-reactions {
  display: flex;
  gap: 4px;
  margin-top: 4px;
  flex-wrap: wrap;
}
.message.self .message-reactions { justify-content: flex-end; }

.reaction-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: all var(--transition);
}
.reaction-chip:hover { border-color: var(--accent); background: var(--hover-strong); }
.reaction-chip.me { border-color: var(--accent); }

/* === Message Actions (hover) === */
.message-actions {
  display: none;
  position: absolute;
  right: 4px;
  top: -12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
  box-shadow: var(--shadow);
  z-index: 5;
}
.message:hover .message-actions { display: flex; }
.message.self .message-actions { right: auto; left: 4px; }
.message-actions .btn-icon {
  width: 28px;
  height: 28px;
  font-size: 0.85rem;
}

/* === Reaction Picker === */
.reaction-picker {
  display: flex;
  gap: 2px;
  padding: 4px 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow);
  position: absolute;
  top: -36px;
  right: 0;
  z-index: 10;
}
.reaction-picker-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  padding: 4px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: transform var(--transition);
}
.reaction-picker-btn:hover { transform: scale(1.3); }

/* === Chat Input === */
.chat-input-area {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}
.reply-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: var(--font-size-xs);
}
.reply-bar-text {
  flex: 1;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reply-bar-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
}

.chat-input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}
.chat-input {
  flex: 1;
  padding: 10px 14px;
  max-height: 120px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  resize: none;
  outline: none;
  line-height: 1.5;
}
.chat-input:focus { border-color: var(--accent); }
.chat-input::placeholder { color: var(--text-tertiary); }

.chat-send-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.chat-send-btn:hover { background: var(--accent-hover); }
.chat-send-btn:disabled { opacity: 0.5; cursor: default; }

/* === Chat Empty State === */
.chat-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  gap: 8px;
}
.chat-empty-icon {
  font-size: 3rem;
  opacity: 0.3;
}

/* === Member List === */
.member-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}
.member-info { flex: 1; }
.member-name { font-weight: 500; font-size: var(--font-size-sm); }
.member-role { font-size: var(--font-size-xs); color: var(--text-tertiary); }

/* === Settings === */
.settings-section {
  margin-bottom: 32px;
}
.settings-section h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.profile-avatar-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

/* === Admin === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.stat-card {
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.stat-card-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.stat-card-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

/* === Markdown Content === */
.markdown-content { line-height: 1.6; }
.markdown-content p { margin: 0 0 4px; }
.markdown-content p:last-child { margin-bottom: 0; }
.markdown-content strong { font-weight: 600; }
.markdown-content em { font-style: italic; }
.markdown-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(0,0,0,0.08);
  padding: 1px 4px;
  border-radius: 3px;
}
[data-theme="dark"] .markdown-content code { background: rgba(255,255,255,0.12); }
.markdown-content pre {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-tertiary);
  padding: 12px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 4px 0 8px;
}
.markdown-content pre code {
  background: none;
  padding: 0;
}
.markdown-content ul, .markdown-content ol {
  padding-left: 1.5em;
  margin: 4px 0;
}
.markdown-content blockquote {
  border-left: 3px solid var(--text-tertiary);
  padding-left: 12px;
  margin: 4px 0;
  color: var(--text-secondary);
}
.markdown-content h1, .markdown-content h2, .markdown-content h3 { margin: 8px 0 4px; }
.markdown-content a { color: #2563EB; text-decoration: underline; }

/* === Image Viewer Modal === */
.image-viewer {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  cursor: pointer;
}
.image-viewer img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}