frontend/src/App.css

html.aj-hide-pointer,
html.aj-hide-pointer * {
  cursor: none !important;
}

.aj-app {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--lc-bg);
  color: var(--lc-text);
}

/* Matches Version B: single row, three columns — brand | title | actions */
.aj-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 12px 24px;
  background: var(--lc-bg2);
  border-bottom: 1px solid var(--lc-border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
  position: relative;
  z-index: 50;
}

/* Neon.ai header brand */
.aj-header-brand-link {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-self: start;
  text-decoration: none;
  color: inherit;
  transition: opacity 0.15s;
  font-size: 16px;
}

.aj-header-brand-link:hover {
  opacity: 0.8;
}

.aj-header-logo {
  height: 32px;
  width: auto;
  display: block;
}

.aj-header-brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--lc-text);
}

.aj-header-title-wrap {
  text-align: center;
}

.aj-header-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.aj-sub {
  font-size: 12px;
  color: var(--lc-muted);
  margin: 0;
}

/* Version B: actions live in aj-options-wrap (flex row, right-aligned) */
.aj-options-wrap {
  position: relative;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Header icon buttons — compact; overflow / composer use different rules below */
.aj-header .aj-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  gap: 0;
  border-radius: 8px;
  border: 1px solid var(--lc-border);
  background: var(--lc-bg);
  color: var(--lc-muted);
  cursor: pointer;
  font-size: 0;
}

.aj-header .aj-btn:hover:not(:disabled) {
  background: var(--lc-hover);
  color: var(--lc-text);
  border-color: var(--lc-accent);
}

.aj-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--lc-border);
  background: var(--lc-elevated);
  color: inherit;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}

.aj-btn:hover:not(:disabled) {
  border-color: var(--lc-accent);
  background: var(--lc-hover);
}

.aj-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.aj-btn.primary {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border-color: transparent;
  color: #fff;
}

.aj-btn.primary:hover:not(:disabled) {
  filter: brightness(1.05);
}

.aj-btn.danger {
  border-color: rgba(220, 38, 38, 0.28);
  color: #b91c1c;
}

.aj-header .aj-btn.danger {
  color: #dc2626;
  border-color: #fca5a5;
}

.aj-header .aj-btn.danger:hover:not(:disabled) {
  background: #fef2f2;
  border-color: #dc2626;
}

.aj-btn.ghost {
  border-color: transparent;
  background: transparent;
}

.aj-btn.ghost:hover:not(:disabled) {
  background: var(--lc-hover);
}

.aj-options-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 200;
  width: min(400px, calc(100vw - 32px));
  max-height: min(70vh, 520px);
  overflow-y: auto;
  padding: 14px 16px 16px;
  border-radius: 12px;
  border: 1px solid var(--lc-border);
  background: var(--lc-elevated);
  box-shadow: var(--lc-shadow);
}

.aj-options-hint {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--lc-muted);
  line-height: 1.45;
}

.aj-field span {
  display: block;
  font-size: 11px;
  color: var(--lc-muted);
  margin-bottom: 6px;
}

.aj-field textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--lc-border);
  background: var(--lc-input);
  color: var(--lc-text);
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  min-height: 120px;
}

.aj-field textarea::placeholder {
  color: var(--lc-placeholder);
  opacity: 0.85;
}

.aj-chat-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.aj-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: linear-gradient(180deg, var(--lc-bg2) 0%, var(--lc-bg) 100%);
}

/* Fixed above composer — jump to bottom when chat list is scrolled up */
.aj-jump-bottom-btn {
  position: fixed;
  right: 24px;
  bottom: calc(96px + env(safe-area-inset-bottom, 0px));
  z-index: 55;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--lc-border);
  background: var(--lc-elevated);
  color: var(--lc-accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.aj-jump-bottom-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.2);
  border-color: var(--lc-accent);
}

.aj-jump-bottom-btn:focus-visible {
  outline: 2px solid var(--lc-accent);
  outline-offset: 2px;
}

@media (max-width: 520px) {
  .aj-jump-bottom-btn {
    right: 16px;
    bottom: calc(88px + env(safe-area-inset-bottom, 0px));
    width: 44px;
    height: 44px;
  }
}

.aj-msg-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 16px;
}

.aj-msg-row.user {
  flex-direction: row-reverse;
}

.aj-shape {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--lc-accent);
}

.aj-bubble-wrap {
  max-width: min(560px, 88%);
  position: relative;
  z-index: 0;
}

.aj-bubble-name {
  font-size: 11px;
  color: var(--lc-muted);
  margin-bottom: 4px;
  padding: 0 4px;
}

.aj-msg-row.user .aj-bubble-name {
  text-align: right;
}

.aj-bubble {
  padding: 12px 16px;
  border-radius: 16px;
  line-height: 1.55;
  font-size: 14px;
  border: 1px solid var(--lc-border);
  background: var(--lc-bubble);
  box-shadow: var(--lc-shadow);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Speech-bubble tails: one corner tighter for a natural bubble shape */
.aj-msg-row:not(.user) .aj-bubble {
  border-bottom-left-radius: 4px;
}

.aj-msg-row.user .aj-bubble {
  border-radius: 16px;
  border-bottom-right-radius: 4px;
  background: linear-gradient(135deg, var(--lc-accent), #6366f1);
  color: #fff;
  border-color: transparent;
}

/* Assistant replies: render markdown as formatted text (not raw syntax) */
.aj-bubble--assistant-md {
  white-space: normal;
}

.aj-bubble-md {
  line-height: 1.55;
}

.aj-bubble-md p {
  margin: 0 0 0.65em;
}

.aj-bubble-md p:last-child {
  margin-bottom: 0;
}

.aj-bubble-md h1,
.aj-bubble-md h2,
.aj-bubble-md h3,
.aj-bubble-md h4 {
  margin: 0.85em 0 0.4em;
  line-height: 1.25;
  font-weight: 600;
}

.aj-bubble-md h1:first-child,
.aj-bubble-md h2:first-child,
.aj-bubble-md h3:first-child,
.aj-bubble-md h4:first-child {
  margin-top: 0;
}

.aj-bubble-md h1 {
  font-size: 1.2em;
}

.aj-bubble-md h2 {
  font-size: 1.1em;
}

.aj-bubble-md h3,
.aj-bubble-md h4 {
  font-size: 1.05em;
}

.aj-bubble-md ul,
.aj-bubble-md ol {
  margin: 0 0 0.65em;
  padding-left: 1.35em;
}

.aj-bubble-md li {
  margin: 0.2em 0;
}

.aj-bubble-md li > p {
  margin: 0.25em 0;
}

.aj-bubble-md blockquote {
  margin: 0.5em 0;
  padding: 0 0 0 0.75em;
  border-left: 3px solid var(--lc-accent);
  color: var(--lc-muted);
}

.aj-bubble-md hr {
  margin: 0.85em 0;
  border: none;
  border-top: 1px solid var(--lc-border);
}

.aj-bubble-md pre {
  margin: 0.5em 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.06);
  overflow-x: auto;
  font-size: 13px;
}

.aj-bubble-md code {
  font-family: ui-monospace, 'Cascadia Code', 'Segoe UI Mono', monospace;
  font-size: 0.92em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.07);
}

.aj-bubble-md pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.aj-bubble-md a {
  color: var(--lc-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.aj-bubble-md table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5em 0;
  font-size: 13px;
}

.aj-bubble-md th,
.aj-bubble-md td {
  border: 1px solid var(--lc-border);
  padding: 6px 8px;
  text-align: left;
}

.aj-bubble-md th {
  background: rgba(15, 23, 42, 0.04);
}

.aj-typing {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lc-accent);
  animation: aj-pulse 1s ease-in-out infinite;
}

@keyframes aj-pulse {
  0%,
  100% {
    opacity: 0.35;
  }
  50% {
    opacity: 1;
  }
}

/* Context meter bar — sticks at top when scrolling */
.aj-context-bar {
  position: sticky;
  top: 0;
  z-index: 49;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  border-bottom: 1px solid var(--lc-border);
  background: var(--lc-sidebar);
}

.aj-context-meter {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--lc-border);
  overflow: hidden;
  max-width: 180px;
}

.aj-context-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--lc-accent);
  transition: width 0.3s;
}

.aj-context-fill[data-hot] {
  background: #ef4444;
}

.aj-context-label {
  font-size: 11px;
  color: var(--lc-muted);
  white-space: nowrap;
}

/* Summary banner */
.aj-summary-banner {
  margin: 16px auto;
  max-width: 560px;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--lc-accent);
  background: var(--lc-hover);
}

.aj-summary-banner p {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.5;
}

.aj-summary-banner p:last-child {
  margin-bottom: 0;
}

.aj-summary-text {
  color: var(--lc-muted);
  font-size: 12px !important;
}

/* Context overflow banner */
.aj-overflow-banner {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  background: #fef2f2;
  border-top: 1px solid #fca5a5;
}

.aj-overflow-icon {
  flex-shrink: 0;
  color: #dc2626;
  margin-top: 2px;
}

.aj-overflow-body {
  flex: 1;
  min-width: 0;
}

.aj-overflow-title {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  color: #991b1b;
}

.aj-overflow-detail {
  margin: 0 0 12px;
  font-size: 13px;
  color: #7f1d1d;
  line-height: 1.5;
}

.aj-overflow-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.aj-overflow-actions .aj-btn {
  font-size: 12px;
  padding: 6px 12px;
}

.aj-composer {
  padding: 14px 20px 20px;
  border-top: 1px solid var(--lc-border);
  background: var(--lc-sidebar);
}

.aj-composer-inner {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  max-width: 880px;
  margin: 0 auto;
}

.aj-composer textarea {
  flex: 1;
  box-sizing: border-box;
  min-height: 44px;
  max-height: 50vh;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #94a3b8;
  background: var(--lc-input);
  color: var(--lc-text);
  font-size: 14px;
  resize: none;
  line-height: 1.45;
  overflow-y: hidden;
}

.aj-composer textarea:focus {
  outline: none;
  border-color: var(--lc-accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.aj-composer textarea::placeholder {
  color: var(--lc-placeholder);
}

.aj-composer .aj-btn {
  width: 44px;
  height: 44px;
  padding: 0;
  justify-content: center;
  flex-shrink: 0;
}

.aj-share-wrap {
  position: relative;
  flex-shrink: 0;
}

.aj-share-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 8px);
  z-index: 200;
  min-width: 200px;
  max-width: min(280px, calc(100vw - 40px));
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--lc-border);
  background: var(--lc-elevated);
  box-shadow: var(--lc-shadow);
}

.aj-share-item {
  display: block;
  width: 100%;
  margin: 0;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--lc-text);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
}

.aj-share-item:hover {
  background: var(--lc-hover);
}

.aj-share-hint {
  margin: 6px 4px 2px;
  font-size: 11px;
  line-height: 1.4;
  color: var(--lc-muted);
}

/* Per-message search (assistant) — popover right or below bubble */
.aj-msg-search-anchor {
  width: 100%;
  margin-top: 8px;
}

.aj-msg-search-wrap {
  display: flex;
  justify-content: flex-end;
}

.aj-msg-search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 8px;
  border: 1px solid var(--lc-border);
  background: var(--lc-input);
  color: var(--lc-muted);
  cursor: pointer;
}

.aj-msg-search-btn:hover {
  border-color: var(--lc-accent);
  color: var(--lc-accent);
  background: var(--lc-hover);
}

/* position: fixed + top/left/width set inline (escapes .aj-messages overflow) */
.aj-msg-search-popover {
  position: fixed;
  visibility: hidden;
  z-index: 250;
  box-sizing: border-box;
  min-width: 280px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--lc-border);
  background: var(--lc-sidebar);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  max-height: min(70vh, 520px);
  overflow-y: auto;
}

.aj-msg-search-popover-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--lc-text);
}

.aj-msg-search-close {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  color: var(--lc-muted);
  padding: 0 4px;
}

.aj-msg-search-close:hover {
  color: var(--lc-text);
}

.aj-msg-search-loading {
  font-size: 12px;
  color: var(--lc-muted);
}

.aj-msg-search-input {
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--lc-border);
  background: var(--lc-input);
  color: var(--lc-text);
  font-size: 12px;
  line-height: 1.45;
  resize: vertical;
  min-height: 64px;
  font-family: inherit;
}

.aj-msg-search-input:focus {
  outline: none;
  border-color: var(--lc-accent);
  box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.12);
}

.aj-msg-search-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.aj-msg-search-actions .aj-btn {
  width: auto;
  height: auto;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
}