.usemath-ai-chatbot {
  --umai-border: rgba(26, 43, 70, 0.16);
  --umai-border-strong: rgba(26, 43, 70, 0.28);
  --umai-surface: #ffffff;
  --umai-surface-2: #f7fbff;
  --umai-sidebar: #dff3ff;
  --umai-soft: #f4f7fb;
  --umai-text: #142033;
  --umai-muted: #5d6b7a;
  --umai-accent: #4f5e93;
  --umai-accent-dark: #333f70;
  --umai-user: #eef3ff;
  --umai-system: #fff8dd;
  --umai-shadow: 0 14px 36px rgba(20, 32, 51, 0.10);
  --umai-chat-font-size: 14px;
  display: block;
  margin: 1rem 0;
  color: var(--umai-text);
  font-family: inherit;
}

.usemath-ai-chatbot[data-theme="dark"] {
  --umai-border: rgba(255, 255, 255, 0.12);
  --umai-border-strong: rgba(255, 255, 255, 0.22);
  --umai-surface: #171b27;
  --umai-surface-2: #101522;
  --umai-sidebar: #132234;
  --umai-soft: #0e1320;
  --umai-text: #f4f6fb;
  --umai-muted: #aab4c2;
  --umai-accent: #8ea1ff;
  --umai-accent-dark: #c3ccff;
  --umai-user: #1c2b46;
  --umai-system: #292412;
}

@media (prefers-color-scheme: dark) {
  .usemath-ai-chatbot[data-theme="auto"] {
    --umai-border: rgba(255, 255, 255, 0.12);
    --umai-border-strong: rgba(255, 255, 255, 0.22);
    --umai-surface: #171b27;
    --umai-surface-2: #101522;
    --umai-sidebar: #132234;
    --umai-soft: #0e1320;
    --umai-text: #f4f6fb;
    --umai-muted: #aab4c2;
    --umai-accent: #8ea1ff;
    --umai-accent-dark: #c3ccff;
    --umai-user: #1c2b46;
    --umai-system: #292412;
  }
}

.usemath-ai-chatbot * {
  box-sizing: border-box;
}

.usemath-ai-chatbot button,
.usemath-ai-chatbot input,
.usemath-ai-chatbot select,
.usemath-ai-chatbot textarea {
  font: inherit;
}

.usemath-ai-chatbot .umai-shell {
  position: relative;
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  min-height: 680px;
  border: 1px solid var(--umai-border);
  border-radius: 20px;
  background: var(--umai-surface);
  box-shadow: var(--umai-shadow);
  overflow: hidden;
}

.usemath-ai-chatbot.is-compact .umai-shell {
  grid-template-columns: 220px minmax(0, 1fr);
  min-height: 520px;
}

.usemath-ai-chatbot.is-fullscreen {
  position: fixed;
  inset: 14px;
  z-index: 999999;
  margin: 0;
}

.usemath-ai-chatbot.is-fullscreen .umai-shell {
  height: calc(100vh - 28px);
}

.usemath-ai-chatbot .umai-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 0;
  padding: 1rem;
  background: var(--umai-sidebar);
  border-right: 1px solid var(--umai-border);
}

.usemath-ai-chatbot .umai-brand {
  text-align: center;
  padding: 0.25rem 0 0.5rem;
}

.usemath-ai-chatbot .umai-brand-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.1;
}

.usemath-ai-chatbot .umai-brand-subtitle {
  margin-top: 0.2rem;
  color: var(--umai-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.usemath-ai-chatbot .umai-sidebar-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.usemath-ai-chatbot .umai-pill-button,
.usemath-ai-chatbot .umai-new-chat,
.usemath-ai-chatbot .umai-mini-button,
.usemath-ai-chatbot .umai-icon-button,
.usemath-ai-chatbot .umai-send {
  border: 1px solid var(--umai-border-strong);
  border-radius: 999px;
  background: var(--umai-surface);
  color: var(--umai-text);
  cursor: pointer;
  font-weight: 700;
  line-height: 1;
  transition: transform 120ms ease, filter 120ms ease, border-color 120ms ease;
}

.usemath-ai-chatbot .umai-pill-button,
.usemath-ai-chatbot .umai-new-chat,
.usemath-ai-chatbot .umai-mini-button {
  padding: 0.62rem 0.78rem;
  font-size: 0.82rem;
}

.usemath-ai-chatbot .umai-pill-button:hover:not(:disabled),
.usemath-ai-chatbot .umai-new-chat:hover:not(:disabled),
.usemath-ai-chatbot .umai-mini-button:hover:not(:disabled),
.usemath-ai-chatbot .umai-icon-button:hover:not(:disabled),
.usemath-ai-chatbot .umai-send:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: brightness(0.98);
  border-color: var(--umai-accent);
}

.usemath-ai-chatbot button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.usemath-ai-chatbot .umai-primary,
.usemath-ai-chatbot .umai-send {
  border-color: var(--umai-accent);
  background: var(--umai-accent);
  color: #fff;
}

.usemath-ai-chatbot .umai-danger {
  border-color: #b91c1c;
  background: #fff5f5;
  color: #7f1d1d;
}

.usemath-ai-chatbot .umai-new-chat {
  border-radius: 12px;
  text-align: left;
  background: var(--umai-surface);
}

.usemath-ai-chatbot .umai-conversation-list {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 0;
  overflow: auto;
  padding-right: 0.1rem;
}

.usemath-ai-chatbot .umai-conversation-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.1rem 0.5rem;
  width: 100%;
  border: 1px solid var(--umai-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--umai-text);
  padding: 0.72rem;
  text-align: left;
  cursor: pointer;
}

.usemath-ai-chatbot[data-theme="dark"] .umai-conversation-item,
.usemath-ai-chatbot[data-theme="auto"] .umai-conversation-item {
  background: rgba(255, 255, 255, 0.06);
}

.usemath-ai-chatbot .umai-conversation-item.is-active {
  outline: 2px solid var(--umai-accent);
  background: var(--umai-surface);
}

.usemath-ai-chatbot .umai-conversation-item strong {
  grid-column: 1 / -1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.86rem;
}

.usemath-ai-chatbot .umai-conversation-item span,
.usemath-ai-chatbot .umai-conversation-item time {
  color: var(--umai-muted);
  font-size: 0.72rem;
}

.usemath-ai-chatbot .umai-sidebar-footer {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.5rem;
}

.usemath-ai-chatbot .umai-icon-button {
  min-width: 2.25rem;
  min-height: 2.25rem;
  padding: 0.45rem 0.55rem;
  font-size: 0.72rem;
}

.usemath-ai-chatbot .umai-main {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  min-width: 0;
  background: var(--umai-surface);
}

.usemath-ai-chatbot .umai-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-width: 0;
  padding: 1rem;
  border-bottom: 1px solid var(--umai-border);
  background: var(--umai-surface);
}

.usemath-ai-chatbot .umai-conversation-title {
  width: min(560px, 100%);
  border: 0;
  background: transparent;
  color: var(--umai-text);
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.15;
  padding: 0;
}

.usemath-ai-chatbot .umai-conversation-title:focus {
  outline: 2px solid var(--umai-accent);
  border-radius: 6px;
}

.usemath-ai-chatbot .umai-message-count {
  margin-top: 0.15rem;
  color: var(--umai-muted);
  font-size: 0.8rem;
}

.usemath-ai-chatbot .umai-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.usemath-ai-chatbot .umai-status {
  border: 1px solid var(--umai-border);
  border-radius: 999px;
  padding: 0.45rem 0.65rem;
  background: var(--umai-soft);
  color: var(--umai-muted);
  font-size: 0.76rem;
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.usemath-ai-chatbot .umai-progress {
  height: 0.38rem;
  background: color-mix(in srgb, var(--umai-accent) 12%, transparent);
  overflow: hidden;
}

.usemath-ai-chatbot .umai-progress-bar {
  width: 0%;
  height: 100%;
  background: var(--umai-accent);
  transition: width 160ms ease;
}

.usemath-ai-chatbot .umai-messages {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
  overflow: auto;
  padding: 1.25rem;
  background: var(--umai-soft);
  font-size: var(--umai-chat-font-size);
}

.usemath-ai-chatbot .umai-empty-state {
  align-self: center;
  display: grid;
  gap: 0.4rem;
  max-width: 520px;
  margin-top: 4rem;
  border: 1px dashed var(--umai-border-strong);
  border-radius: 16px;
  padding: 1rem;
  background: var(--umai-surface);
  color: var(--umai-muted);
  text-align: center;
}

.usemath-ai-chatbot .umai-empty-state strong {
  color: var(--umai-text);
  font-size: 1rem;
}

.usemath-ai-chatbot .umai-empty-state small {
  color: var(--umai-muted);
}

.usemath-ai-chatbot .umai-message {
  max-width: min(78ch, 88%);
  border: 1px solid var(--umai-border);
  border-radius: 16px;
  padding: 0.72rem 0.86rem;
  background: var(--umai-surface);
  overflow-wrap: anywhere;
}

.usemath-ai-chatbot .umai-message-user {
  align-self: flex-end;
  background: var(--umai-user);
}

.usemath-ai-chatbot .umai-message-assistant {
  align-self: flex-start;
}

.usemath-ai-chatbot .umai-message-system {
  align-self: center;
  max-width: min(74ch, 96%);
  background: var(--umai-system);
  color: var(--umai-text);
  font-size: 0.92em;
}

.usemath-ai-chatbot .umai-message-label {
  margin-bottom: 0.25rem;
  color: var(--umai-muted);
  font-size: 0.72em;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.usemath-ai-chatbot .umai-message-body {
  line-height: 1.48;
}

.usemath-ai-chatbot code {
  border-radius: 6px;
  padding: 0.1rem 0.25rem;
  background: rgba(20, 32, 51, 0.08);
}

.usemath-ai-chatbot pre {
  overflow: auto;
  border-radius: 10px;
  padding: 0.8rem;
  background: rgba(20, 32, 51, 0.08);
}

.usemath-ai-chatbot .umai-form {
  display: grid;
  gap: 0.45rem;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--umai-border);
  background: var(--umai-surface);
}

.usemath-ai-chatbot .umai-input-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--umai-muted);
  font-size: 0.78rem;
}

.usemath-ai-chatbot .umai-runtime-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.usemath-ai-chatbot textarea,
.usemath-ai-chatbot input,
.usemath-ai-chatbot select {
  border: 1px solid var(--umai-border-strong);
  border-radius: 12px;
  background: var(--umai-surface);
  color: var(--umai-text);
}

.usemath-ai-chatbot textarea {
  width: 100%;
  min-height: 4.8rem;
  resize: vertical;
  padding: 0.75rem;
  font-size: var(--umai-chat-font-size);
}

.usemath-ai-chatbot .umai-input-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--umai-muted);
  font-size: 0.76rem;
}

.usemath-ai-chatbot .umai-send {
  padding: 0.62rem 1rem;
}

.usemath-ai-chatbot .umai-drawer {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  background: rgba(0, 0, 0, 0.28);
}

.usemath-ai-chatbot .umai-drawer[hidden] {
  display: none;
}

.usemath-ai-chatbot .umai-drawer-card {
  width: min(720px, calc(100% - 2rem));
  max-height: calc(100% - 2rem);
  margin: 1rem auto;
  border: 1px solid var(--umai-border);
  border-radius: 16px;
  background: var(--umai-surface);
  box-shadow: var(--umai-shadow);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.usemath-ai-chatbot .umai-prompt-card {
  width: min(560px, calc(100% - 2rem));
}

.usemath-ai-chatbot .umai-drawer-header,
.usemath-ai-chatbot .umai-drawer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--umai-border);
}

.usemath-ai-chatbot .umai-drawer-footer {
  border-top: 1px solid var(--umai-border);
  border-bottom: 0;
  justify-content: flex-end;
}

.usemath-ai-chatbot .umai-drawer-header h3 {
  margin: 0;
  font-size: 1.05rem;
}

.usemath-ai-chatbot .umai-drawer-header p {
  margin: 0.2rem 0 0;
  color: var(--umai-muted);
  font-size: 0.82rem;
}

.usemath-ai-chatbot .umai-settings-grid {
  overflow: auto;
  padding: 1rem;
  display: grid;
  gap: 0.72rem;
}

.usemath-ai-chatbot .umai-setting-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(180px, 1.1fr);
  gap: 0.75rem;
  align-items: center;
  border: 1px solid var(--umai-border);
  border-radius: 12px;
  padding: 0.72rem;
  background: var(--umai-surface-2);
}

.usemath-ai-chatbot .umai-setting-row span {
  display: grid;
  gap: 0.1rem;
}

.usemath-ai-chatbot .umai-setting-row strong {
  font-size: 0.86rem;
}

.usemath-ai-chatbot .umai-setting-row em {
  color: var(--umai-muted);
  font-size: 0.72rem;
  font-style: normal;
}

.usemath-ai-chatbot .umai-setting-row input,
.usemath-ai-chatbot .umai-setting-row select,
.usemath-ai-chatbot .umai-setting-row textarea {
  width: 100%;
  padding: 0.52rem;
}

.usemath-ai-chatbot .umai-setting-row input[type="checkbox"] {
  width: auto;
  justify-self: end;
  inline-size: 1.1rem;
  block-size: 1.1rem;
}

.usemath-ai-chatbot .umai-setting-row input[type="range"] {
  padding: 0;
}

.usemath-ai-chatbot .umai-setting-row:has(input[type="range"]) {
  grid-template-columns: minmax(160px, 1fr) minmax(120px, 1fr) 88px;
}

.usemath-ai-chatbot .umai-setting-wide {
  grid-template-columns: minmax(160px, 0.8fr) minmax(220px, 1.2fr);
}

.usemath-ai-chatbot .umai-prompt-list {
  display: grid;
  gap: 0.6rem;
  overflow: auto;
  padding: 1rem;
}

.usemath-ai-chatbot .umai-prompt-item {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  border: 1px solid var(--umai-border);
  border-radius: 12px;
  padding: 0.85rem;
  background: var(--umai-surface-2);
  color: var(--umai-text);
  text-align: left;
  cursor: pointer;
}

.usemath-ai-chatbot .umai-prompt-item strong {
  font-size: 0.9rem;
}

.usemath-ai-chatbot .umai-prompt-item span {
  color: var(--umai-muted);
  font-size: 0.8rem;
  line-height: 1.35;
}

@media (max-width: 840px) {
  .usemath-ai-chatbot .umai-shell,
  .usemath-ai-chatbot.is-compact .umai-shell {
    grid-template-columns: 1fr;
  }

  .usemath-ai-chatbot .umai-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--umai-border);
    max-height: 280px;
  }

  .usemath-ai-chatbot .umai-chat-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .usemath-ai-chatbot .umai-header-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .usemath-ai-chatbot .umai-setting-row,
  .usemath-ai-chatbot .umai-setting-wide,
  .usemath-ai-chatbot .umai-setting-row:has(input[type="range"]) {
    grid-template-columns: 1fr;
  }

  .usemath-ai-chatbot .umai-input-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .usemath-ai-chatbot .umai-send {
    width: 100%;
  }
}

.usemath-ai-chatbot .umai-debug-log {
  margin: 0.75rem 1rem 0;
  border: 1px solid var(--umai-border);
  border-radius: 12px;
  background: var(--umai-surface-2);
  color: var(--umai-text);
  overflow: hidden;
}

.usemath-ai-chatbot .umai-debug-log-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--umai-border);
  font-size: 0.8rem;
}

.usemath-ai-chatbot .umai-debug-log pre {
  max-height: 150px;
  overflow: auto;
  margin: 0;
  padding: 0.65rem 0.75rem;
  white-space: pre-wrap;
  font-size: 11px;
  line-height: 1.35;
  color: var(--umai-muted);
}

.usemath-ai-chatbot .umai-storage-card {
  max-width: 980px;
}

.usemath-ai-chatbot .umai-storage-grid {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  overflow: auto;
}

.usemath-ai-chatbot .umai-storage-panel {
  border: 1px solid var(--umai-border);
  border-radius: 14px;
  background: var(--umai-surface-2);
  padding: 1rem;
}

.usemath-ai-chatbot .umai-storage-panel h4 {
  margin: 0 0 0.45rem;
  font-size: 0.95rem;
}

.usemath-ai-chatbot .umai-storage-panel p {
  margin: 0 0 0.75rem;
  color: var(--umai-muted);
  line-height: 1.4;
}

.usemath-ai-chatbot .umai-storage-wide {
  grid-column: 1 / -1;
}

.usemath-ai-chatbot .umai-tool-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.55rem;
}

.usemath-ai-chatbot .umai-tool-row input[type="search"] {
  flex: 1 1 260px;
  min-width: 200px;
  border: 1px solid var(--umai-border);
  border-radius: 999px;
  background: var(--umai-surface);
  color: var(--umai-text);
  padding: 0.65rem 0.8rem;
}

.usemath-ai-chatbot .umai-storage-output {
  max-height: 160px;
  overflow: auto;
  margin: 0.75rem 0 0;
  border: 1px solid var(--umai-border);
  border-radius: 10px;
  background: var(--umai-surface);
  color: var(--umai-muted);
  padding: 0.65rem;
  white-space: pre-wrap;
  font-size: 11px;
}

.usemath-ai-chatbot .umai-model-library {
  display: grid;
  gap: 0.65rem;
  max-height: 340px;
  overflow: auto;
  margin-top: 0.75rem;
}

.usemath-ai-chatbot .umai-model-record {
  display: grid;
  gap: 0.3rem;
  border: 1px solid var(--umai-border);
  border-radius: 12px;
  background: var(--umai-surface);
  padding: 0.75rem;
}

.usemath-ai-chatbot .umai-model-record strong {
  font-size: 0.85rem;
  word-break: break-word;
}

.usemath-ai-chatbot .umai-model-record span,
.usemath-ai-chatbot .umai-model-record small {
  color: var(--umai-muted);
  font-size: 0.75rem;
  line-height: 1.35;
  word-break: break-word;
}