:root {
  --bg: #0b1020;
  --panel: #141b34;
  --text: #e6e8ef;
  --muted: #9aa3b2;
  --accent: #6ea8fe;
  --border: #24304f;
}

* { box-sizing: border-box; }
html, body, #root { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial; }

.no-select {
  user-select: none;
  cursor: ew-resize !important;
}

.app {
  display: grid;
  grid-template-columns: var(--sidebar-width, 280px) 1fr; /* Sidebar width and main content */
  grid-template-rows: 1fr;
  height: 100%;
}

.sidebar {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--panel);
  border-right: 1px solid var(--border);
  height: 100vh; /* Use viewport height to prevent window scrolling */
  overflow: hidden; /* Prevent the entire sidebar from scrolling */
  position: relative; /* For resizer positioning */
}

.resizer {
  width: 13px; /* 8px original + 5px to the right */
  cursor: ew-resize;
  background: transparent;
  position: absolute;
  top: 0;
  right: -5px; /* Adjust to center the wider resizer */
  bottom: 0;
  z-index: 1;
}
/* Removed .resizer:hover as per user request */

.sidebar-header {
  display: flex;
  justify-content: space-around;
  padding: 0; /* Remove padding to allow tabs to fill */
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.sidebar-tab {
  flex-grow: 1;
  text-align: center;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 3px solid transparent; /* For active indicator */
  transition: background-color 0.2s ease;
}

.sidebar-tab:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.sidebar-tab.active {
  background-color: rgba(255, 255, 255, 0.1);
  border-bottom-color: var(--accent);
}

.sidebar-content {
  flex-grow: 1;
  overflow-y: auto;
}

.db-list, .settings-list {
  padding: 8px 0;
}

.empty-list-message {
  padding: 10px 16px;
  color: var(--muted);
  text-align: center;
}

.settings-item {
  padding: 10px 16px;
  cursor: pointer;
  border-left: 3px solid transparent; /* For active indicator */
}

.settings-item.active {
  background: rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent);
}

.settings-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.settings-footer-placeholder {
  height: 40px; /* Match button height for alignment */
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}

.new-db-button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: bold;
}

.new-db-button:hover {
  opacity: 0.9;
}

.chat-list {
  overflow-y: auto;
  padding: 8px 0;
}

.chat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  cursor: pointer;
  border-left: 3px solid transparent; /* For active indicator */
  /* For truncating text */
  overflow: hidden;
  white-space: nowrap;
}

.chat-item span {
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-item-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.unread-dot {
  width: 8px;
  height: 8px;
  background-color: red;
  border-radius: 50%;
  margin-right: 4px;
}

.icon-button {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-button svg {
  width: 16px;
  height: 16px;
  stroke: var(--muted);
  transition: stroke 0.2s ease;
}

.icon-button:hover svg {
  stroke: var(--accent);
}

.icon-button:hover {
  color: var(--accent);
}

.chat-item.active {
  background: rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent);
}

.chat-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.rename-input {
  background: var(--input-bg);
  border: 1px solid var(--accent);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  outline: none;
  width: 100%;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}

.new-chat-button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: bold;
}

.new-chat-button:hover {
  opacity: 0.9;
}

.main-content {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100vh; /* Use viewport height to prevent window scrolling */
  overflow: hidden; /* Prevent the entire main content from scrolling */
}

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.select, .input, .button {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  outline: none;
}

.footer-content-wrapper .button {
  flex-shrink: 0; /* Prevent the button from shrinking */
}

.select { min-width: 220px; }
.button { cursor: pointer; }
.button:hover { border-color: var(--accent); }

.chat {
  display: grid;
  grid-template-columns: 1fr minmax(auto, 1000px) 1fr;
  align-content: start;
  gap: 8px;
  padding: 16px;
  overflow: auto;
}

.chat > * {
  grid-column: 2;
}

.msg {
  padding: 12px 14px;
  border-radius: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial; /* Match body font */
}

textarea.input {
  resize: none; /* Disable manual resizing */
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial; /* Match body font */
  overflow-y: auto; /* Add scrollbar when content exceeds max-height */
  flex-grow: 1; /* Allow textarea to take up available space */
}

.msg.user {
  background: var(--user-msg-bg);
  margin-left: auto; /* Right-align user messages */
  max-width: 800px;
  border: 1px solid var(--border);
}
.msg.assistant {
  background: transparent;
  border: none;
  max-width: none; /* Remove max-width for assistant messages */
}

.footer {
  display: flex; /* Use flexbox for centering content */
  justify-content: center; /* Center the content horizontally */
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  align-items: flex-end; /* Align items to the bottom */
}

.footer-content-wrapper {
  display: flex; /* Arrange textarea and button side-by-side */
  gap: 8px; /* Space between textarea and button */
  width: 100%; /* Take full width of its parent (footer) */
  max-width: 1000px; /* Max width for the content */
  align-items: flex-end; /* Align items to the bottom */
}

/* Settings Page Styles (removed nested sidebar styles) */
/* The main .app grid and .sidebar will handle settings navigation */

.settings-content-panel {
  padding: 20px;
  overflow-y: auto;
  height: 100%; /* Ensure it takes full height of its parent */
}

.settings-category {
  margin-bottom: 30px;
}

.settings-category h2 {
  color: var(--accent);
  margin-bottom: 15px;
  font-size: 1.3em;
}

.setting-section {
  margin-bottom: 20px;
  padding: 15px; /* Adjusted padding */
  border-bottom: 1px solid var(--border);
  background-color: var(--panel); /* Background for setting sections */
  border-radius: 8px;
}

.setting-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.setting-section h3 {
  color: var(--text);
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.1em;
}

/* Re-apply general input/select styles for settings components */
.settings-content-panel .input,
.settings-content-panel .select {
  width: 100%;
  max-width: 400px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: var(--input-bg);
  color: var(--text);
  font-size: 1em;
}

.settings-content-panel .select {
  min-width: unset;
}

/* Markdown Styles */
.msg h1, .msg h2, .msg h3, .msg h4 {
  margin: 10px 0;
  color: var(--accent);
}

.msg ul {
  padding-left: 20px;
}

.msg li {
  margin-bottom: 5px;
}

.msg code {
  background-color: var(--input-bg);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: monospace;
}

.msg pre {
  background-color: var(--input-bg);
  padding: 10px;
  border-radius: 8px;
  overflow-x: auto;
  white-space: pre-wrap;
}

.msg pre code {
  padding: 0;
  background-color: transparent;
}