/* ═══════════════════════════════════════════════════════════════════
   GIS-Điện Bàn Bắc — AI Assistant Page
   Tuân thủ MD3 Design Tokens (tokens.css)
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Root: 2-panel layout ─── */
.aichat-page {
  display: flex;
  height: 100%;
  background: var(--md-sys-color-surface);
  font-family: var(--md-sys-typescale-font-family-text);
  overflow: hidden;
}

/* ═══════════════════════════
   LEFT SIDEBAR — Session list
═════════════════════════════ */
.aichat-sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--md-sys-color-surface-container-low);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  overflow: hidden;
}

.aichat-sidebar-header {
  padding: 16px 12px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.aichat-sidebar-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-medium);
  background: var(--md-sys-color-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.aichat-sidebar-logo .material-symbols-outlined {
  font-size: 20px;
  color: var(--md-sys-color-primary);
}

.aichat-sidebar-brand {
  flex: 1;
  min-width: 0;
}

.aichat-sidebar-brand-title {
  font-size: var(--md-sys-typescale-title-small-size);
  font-weight: var(--md-sys-typescale-title-small-weight);
  color: var(--md-sys-color-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aichat-sidebar-brand-sub {
  font-size: var(--md-sys-typescale-label-small-size);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.4;
}

.aichat-sidebar-new-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-small);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  transition: background var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  flex-shrink: 0;
}

.aichat-sidebar-new-btn:hover {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-primary);
}

.aichat-sidebar-new-btn .material-symbols-outlined { font-size: 20px; }

/* ─── Session Groups ─── */
.aichat-sessions-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.aichat-session-group {
  margin-bottom: 4px;
}

.aichat-session-group-label {
  padding: 6px 14px 4px;
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--md-sys-color-on-surface-variant);
}

.aichat-session-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  border-radius: 0;
  transition: background var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  position: relative;
}

.aichat-session-item:hover {
  background: rgba(0, 109, 91, 0.06);
}

.aichat-session-item.active {
  background: var(--md-sys-color-secondary-container);
}

.aichat-session-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: var(--md-sys-color-primary);
  border-radius: 0 var(--md-sys-shape-extra-small) var(--md-sys-shape-extra-small) 0;
}

.aichat-session-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--md-sys-shape-extra-small);
  background: var(--md-sys-color-surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.aichat-session-item.active .aichat-session-icon {
  background: var(--md-sys-color-primary-container);
}

.aichat-session-icon .material-symbols-outlined {
  font-size: 15px;
  color: var(--md-sys-color-on-surface-variant);
}

.aichat-session-item.active .aichat-session-icon .material-symbols-outlined {
  color: var(--md-sys-color-primary);
}

.aichat-session-text {
  flex: 1;
  min-width: 0;
}

.aichat-session-title {
  font-size: var(--md-sys-typescale-body-medium-size);
  font-weight: 400;
  color: var(--md-sys-color-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

.aichat-session-item.active .aichat-session-title {
  font-weight: 500;
  color: var(--md-sys-color-on-secondary-container);
}

.aichat-session-time {
  font-size: var(--md-sys-typescale-label-small-size);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.3;
  flex-shrink: 0;
}

/* ─── Sidebar Footer ─── */
.aichat-sidebar-footer {
  padding: 10px 12px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  gap: 8px;
}

.aichat-sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.aichat-sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.aichat-sidebar-user-name {
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aichat-sidebar-user-role {
  font-size: var(--md-sys-typescale-label-small-size);
  color: var(--md-sys-color-on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ═══════════════════════════
   MAIN CHAT AREA
═════════════════════════════ */
.aichat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ─── Chat Header ─── */
.aichat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  flex-shrink: 0;
}

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

.aichat-header-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-medium);
  background: var(--md-sys-color-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
}

.aichat-header-icon .material-symbols-outlined {
  font-size: 22px;
  color: var(--md-sys-color-primary);
}

.aichat-header-title {
  font-size: var(--md-sys-typescale-title-medium-size);
  font-weight: var(--md-sys-typescale-title-medium-weight);
  color: var(--md-sys-color-on-surface);
  line-height: 1.2;
}

.aichat-header-sub {
  font-size: var(--md-sys-typescale-body-small-size);
  color: var(--md-sys-color-on-surface-variant);
}

.aichat-header-status {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--md-sys-typescale-label-small-size);
  color: #2E7D32;
  font-weight: 500;
}

.aichat-header-status::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #43A047;
  animation: statusPulse 2s infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.aichat-header-actions {
  display: flex;
  gap: 4px;
}

.aichat-hdr-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: var(--md-sys-typescale-label-large-weight);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.aichat-hdr-btn:hover {
  background: var(--md-sys-color-surface-container-low);
  border-color: var(--md-sys-color-outline);
  color: var(--md-sys-color-on-surface);
}

.aichat-hdr-btn .material-symbols-outlined { font-size: 17px; }

/* ─── Chat Body ─── */
.aichat-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ─── Empty State ─── */
.aichat-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 16px 20px;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
}

.aichat-empty-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--md-sys-shape-extra-large);
  background: var(--md-sys-color-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  animation: emptyFloat 3s ease-in-out infinite;
}

.aichat-empty-icon .material-symbols-outlined {
  font-size: 36px;
  color: var(--md-sys-color-primary);
}

@keyframes emptyFloat {
  0%, 100% { transform: translateY(0); box-shadow: var(--md-sys-elevation-1); }
  50% { transform: translateY(-6px); box-shadow: var(--md-sys-elevation-3); }
}

.aichat-empty-title {
  font-size: var(--md-sys-typescale-headline-small-size);
  font-weight: var(--md-sys-typescale-headline-small-weight);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 8px;
  line-height: 1.3;
}

.aichat-empty-sub {
  font-size: var(--md-sys-typescale-body-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 28px;
}

/* ─── Suggestion Cards ─── */
.aichat-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 640px;
}

.aichat-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 14px;
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-medium);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  box-shadow: var(--md-sys-elevation-1);
}

.aichat-card:hover {
  background: var(--md-sys-color-primary-container);
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-2);
  transform: translateY(-1px);
}

.aichat-card-icon {
  font-size: 18px;
  color: var(--md-sys-color-primary);
  flex-shrink: 0;
  margin-top: 1px;
}

.aichat-card-text {
  font-size: var(--md-sys-typescale-body-medium-size);
  color: var(--md-sys-color-on-surface);
  line-height: 1.4;
  flex: 1;
}

.aichat-card:hover .aichat-card-text {
  color: var(--md-sys-color-on-primary-container);
}

/* ─── Chat rows ─── */
.aichat-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-emphasized),
              transform var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-emphasized);
}

.aichat-row.visible {
  opacity: 1;
  transform: translateY(0);
}

.aichat-row--user {
  flex-direction: row-reverse;
  align-self: flex-end;
}

.aichat-row--ai {
  flex-direction: row;
  align-self: flex-start;
  width: 100%;
  max-width: 820px;
}

/* ─── Avatars ─── */
.aichat-avatar-ai {
  flex-shrink: 0;
  margin-top: 3px;
}

.aichat-ai-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-medium);
  background: var(--md-sys-color-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--md-sys-elevation-1);
}

.aichat-ai-avatar .material-symbols-outlined {
  font-size: 18px;
  color: var(--md-sys-color-primary);
}

.aichat-ai-avatar--thinking {
  animation: aiThink 1.4s ease-in-out infinite;
}

@keyframes aiThink {
  0%, 100% { box-shadow: var(--md-sys-elevation-1); }
  50% { box-shadow: 0 0 0 4px var(--md-sys-color-primary-container), var(--md-sys-elevation-2); }
}

.aichat-avatar-user {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  margin-top: 3px;
}

/* ─── Bubbles ─── */
.aichat-bubble {
  max-width: 78%;
  padding: 11px 15px;
  border-radius: var(--md-sys-shape-medium);
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: 1.7;
}

.aichat-bubble--ai {
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-extra-small) var(--md-sys-shape-medium) var(--md-sys-shape-medium) var(--md-sys-shape-medium);
  box-shadow: var(--md-sys-elevation-1);
  max-width: 100%;
}

.aichat-bubble--user {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: var(--md-sys-shape-medium) var(--md-sys-shape-extra-small) var(--md-sys-shape-medium) var(--md-sys-shape-medium);
  box-shadow: var(--md-sys-elevation-2);
}

/* Thinking dots */
.aichat-bubble--thinking {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 14px 18px;
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-extra-small) var(--md-sys-shape-medium) var(--md-sys-shape-medium) var(--md-sys-shape-medium);
  box-shadow: var(--md-sys-elevation-1);
}

.aichat-bubble--thinking span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  animation: thinkBounce 1.2s infinite;
}
.aichat-bubble--thinking span:nth-child(2) { animation-delay: 0.18s; background: var(--md-sys-color-secondary); }
.aichat-bubble--thinking span:nth-child(3) { animation-delay: 0.36s; background: var(--md-sys-color-tertiary); }

@keyframes thinkBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-7px); opacity: 1; }
}

/* ─── AI Content Rendering ─── */
.aichat-bubble-content {
  color: var(--md-sys-color-on-surface);
}

.aichat-bubble--user .aichat-bubble-content {
  color: var(--md-sys-color-on-primary);
}

.ai-page-h2 {
  font-size: var(--md-sys-typescale-title-medium-size);
  font-weight: 600;
  color: var(--md-sys-color-primary);
  margin: 6px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1.5px solid var(--md-sys-color-primary-container);
  line-height: 1.3;
}

.ai-page-h3 {
  font-size: var(--md-sys-typescale-title-small-size);
  font-weight: var(--md-sys-typescale-title-small-weight);
  color: var(--md-sys-color-on-surface);
  margin: 12px 0 5px;
  line-height: 1.3;
}

.ai-p {
  margin: 5px 0;
  color: var(--md-sys-color-on-surface);
  line-height: 1.7;
}

.ai-ul {
  margin: 6px 0;
  padding-left: 18px;
  color: var(--md-sys-color-on-surface);
}

.ai-ul li { margin: 3px 0; line-height: 1.6; }

.ai-code {
  background: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-primary);
  padding: 2px 6px;
  border-radius: var(--md-sys-shape-extra-small);
  font-size: 12px;
  font-family: 'Roboto Mono', monospace;
}

.ai-quote {
  border-left: 3px solid var(--md-sys-color-primary);
  padding: 8px 13px;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: 0 var(--md-sys-shape-small) var(--md-sys-shape-small) 0;
  margin: 10px 0;
  font-size: var(--md-sys-typescale-body-small-size);
  opacity: 0.9;
}

/* ─── Tables ─── */
.ai-table-wrap {
  overflow-x: auto;
  margin: 10px 0;
  border-radius: var(--md-sys-shape-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.ai-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--md-sys-typescale-body-small-size);
}

.ai-table thead tr {
  background: var(--md-sys-color-secondary-container);
}

.ai-table th {
  padding: 9px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--md-sys-color-on-secondary-container);
  white-space: nowrap;
  font-size: var(--md-sys-typescale-label-medium-size);
  letter-spacing: 0.01em;
}

.ai-table td {
  padding: 8px 12px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
  vertical-align: middle;
}

.ai-table tr:hover td { background: var(--md-sys-color-surface-container-low); }

/* ─── Tags / Chips ─── */
.ai-tag-green {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: #E6F4EA;
  color: #137333;
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
}

.ai-tag-red {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-error);
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
}

.ai-tag-yellow {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: #FEF7E0;
  color: #B06000;
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
}

.ai-tag-blue {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-tertiary);
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
}

.ai-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

/* ─── Streaming cursor ─── */
.ai-cursor {
  display: inline-block;
  animation: cursorBlink 0.8s infinite;
  color: var(--md-sys-color-primary);
  margin-left: 1px;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ─── Inline suggestions after response ─── */
.aichat-inline-suggestions {
  max-width: 820px;
  width: 100%;
  margin: 4px auto 0 42px;
}

.aichat-inline-suggestions-label {
  font-size: var(--md-sys-typescale-label-small-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 7px;
}

.aichat-inline-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.aichat-suggestion-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px;
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-body-small-size);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  box-shadow: var(--md-sys-elevation-1);
}

.aichat-suggestion-chip:hover {
  background: var(--md-sys-color-primary-container);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary-container);
}

.aichat-suggestion-chip .material-symbols-outlined {
  font-size: 14px;
  color: var(--md-sys-color-primary);
}

/* ─── Input Bar ─── */
.aichat-input-bar {
  padding: 12px 20px 10px;
  background: var(--md-sys-color-surface);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  flex-shrink: 0;
}

.aichat-input-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--md-sys-color-surface-container-lowest);
  border: 1.5px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-extra-large);
  padding: 8px 8px 8px 16px;
  box-shadow: var(--md-sys-elevation-1);
  transition: border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

.aichat-input-wrap:focus-within {
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-2);
}

.aichat-textarea {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--md-sys-typescale-font-family-text);
  font-size: var(--md-sys-typescale-body-medium-size);
  color: var(--md-sys-color-on-surface);
  resize: none;
  line-height: 1.55;
  max-height: 140px;
  padding: 3px 0;
}

.aichat-textarea::placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

.aichat-input-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.aichat-send-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--md-sys-shape-full);
  border: none;
  background: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  opacity: 0.5;
}

.aichat-send-btn.active,
.aichat-send-btn:hover {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  opacity: 1;
  box-shadow: var(--md-sys-elevation-2);
  transform: scale(1.05);
}

.aichat-send-btn .material-symbols-outlined { font-size: 19px; }

.aichat-input-footer {
  max-width: 820px;
  margin: 7px auto 0;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--md-sys-typescale-label-small-size);
  color: var(--md-sys-color-on-surface-variant);
  justify-content: center;
}

.aichat-input-footer .material-symbols-outlined { font-size: 13px; }

/* ─── Scrollbar (match global) ─── */
.aichat-body::-webkit-scrollbar { width: 6px; }
.aichat-body::-webkit-scrollbar-track { background: transparent; }
.aichat-body::-webkit-scrollbar-thumb { background: var(--md-sys-color-outline-variant); border-radius: var(--md-sys-shape-full); }
.aichat-body::-webkit-scrollbar-thumb:hover { background: var(--md-sys-color-outline); }
.aichat-sessions-scroll::-webkit-scrollbar { width: 4px; }
.aichat-sessions-scroll::-webkit-scrollbar-track { background: transparent; }
.aichat-sessions-scroll::-webkit-scrollbar-thumb { background: var(--md-sys-color-outline-variant); border-radius: var(--md-sys-shape-full); }

/* ═══════════════════════════════════════════════
   GEMINI DIAMOND LOGO
═══════════════════════════════════════════════ */
.gemini-diamond-svg {
  display: block;
  flex-shrink: 0;
  filter: drop-shadow(0 1px 3px rgba(26, 115, 232, 0.3));
}

.gemini-diamond-large {
  filter: drop-shadow(0 2px 8px rgba(26, 115, 232, 0.35))
          drop-shadow(0 0 16px rgba(156, 39, 176, 0.2));
}

/* Gemini avatar background — remove old primary-container bg */
.aichat-ai-avatar {
  background: linear-gradient(135deg,
    rgba(26, 115, 232, 0.08) 0%,
    rgba(156, 39, 176, 0.08) 50%,
    rgba(229, 57, 53, 0.06) 100%
  ) !important;
  border: 1px solid rgba(26, 115, 232, 0.15) !important;
}

/* Sidebar logo background */
.aichat-sidebar-logo {
  background: linear-gradient(135deg,
    rgba(26, 115, 232, 0.08) 0%,
    rgba(249, 168, 37, 0.06) 100%
  ) !important;
  border: 1px solid rgba(26, 115, 232, 0.12);
}

/* Header icon background */
.aichat-header-icon {
  background: linear-gradient(135deg,
    rgba(26, 115, 232, 0.08) 0%,
    rgba(156, 39, 176, 0.08) 100%
  ) !important;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Empty icon — wrap the large SVG */
.aichat-empty-icon {
  background: transparent !important;
  box-shadow: none !important;
}

/* ═══════════════════════════════════════════════
   EMPTY STATE — GRADIENT TITLE
═══════════════════════════════════════════════ */
.aichat-empty-title--gradient {
  background: linear-gradient(
    135deg,
    var(--md-sys-color-on-surface) 0%,
    var(--md-sys-color-primary) 50%,
    #416179 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.aichat-greeting-name {
  background: linear-gradient(
    90deg,
    #1A73E8 0%,
    #9C27B0 40%,
    #E53935 75%,
    #F9A825 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

/* ═══════════════════════════════════════════════
   SIDEBAR — SESSION TAB BAR
═══════════════════════════════════════════════ */
.aichat-sessions-tab-bar {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: 4px 8px 0;
  background: var(--md-sys-color-surface-container-low);
  flex-shrink: 0;
}

.aichat-sessions-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px 8px;
  font-size: var(--md-sys-typescale-label-medium-size);
  font-weight: 600;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  border-radius: var(--md-sys-shape-extra-small) var(--md-sys-shape-extra-small) 0 0;
  transition: color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              border-color var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              background var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  white-space: nowrap;
  user-select: none;
  letter-spacing: 0.01em;
}

.aichat-sessions-tab .material-symbols-outlined {
  font-size: 15px;
  opacity: 0.7;
}

.aichat-sessions-tab.active {
  color: var(--md-sys-color-primary);
  border-bottom-color: var(--md-sys-color-primary);
  background: rgba(0, 109, 91, 0.05);
}

.aichat-sessions-tab.active .material-symbols-outlined {
  opacity: 1;
}

.aichat-sessions-tab:hover:not(.active) {
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface-container);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .aichat-sidebar { width: 220px; }
}
@media (max-width: 680px) {
  .aichat-sidebar { display: none; }
  .aichat-cards-grid { grid-template-columns: 1fr; }
  .aichat-bubble { max-width: 92%; }
}