:root {
  color-scheme: light only;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --color-page: #f4f7f6;
  --color-surface: #ffffff;
  --color-surface-muted: #eaf0ee;
  --color-surface-disabled: #f0f4f3;
  --color-text: #14201e;
  --color-text-muted: #465652;
  --color-text-disabled: #596763;
  --color-border: #bac9c5;
  --color-action: #08756b;
  --color-action-hover: #065f58;
  --color-success: #15803d;
  --color-warning: #b45309;
  --color-error: #b91c1c;
  --font-size-body: 0.875rem;
  --font-size-small: 0.75rem;
  --font-size-chat: 0.875rem;
  --font-size-answer: 0.875rem;
  --font-size-chat-small: 0.75rem;
  --font-size-title: 1.0625rem;
  --radius-small: 6px;
  --radius-medium: 8px;
  --content-width: 1180px;
  color: var(--color-text);
  background: var(--color-page);
  font-size: var(--font-size-body);
  line-height: 1.5;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  color-scheme: light only;
  min-inline-size: 320px;
  margin: 0;
  color: var(--color-text);
  background: var(--color-page);
  overflow-x: hidden;
}

button,
select,
textarea {
  font: inherit;
  color: var(--color-text);
  -webkit-text-fill-color: currentColor;
}

button,
select {
  min-block-size: 40px;
}

button:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 1;
}

select:disabled,
textarea:disabled {
  color: var(--color-text-disabled);
  -webkit-text-fill-color: var(--color-text-disabled);
  border-color: var(--color-border);
  background: var(--color-surface-disabled);
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-action) 36%, transparent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  min-block-size: 100dvh;
  min-block-size: var(--visual-viewport-height, 100dvh);
  block-size: var(--visual-viewport-height, 100dvh);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  background: var(--color-page);
  overflow: hidden;
}

.app-header {
  z-index: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-inline-size: 0;
  padding: 10px 20px;
  border-block-end: 1px solid var(--color-border);
  background: var(--color-surface);
}

.brand-title {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55em;
  margin: 0;
  flex: 0 0 auto;
  color: var(--color-text);
  font-size: var(--font-size-title);
  font-weight: 650;
  letter-spacing: 0;
}

.brand-version {
  font-weight: 400;
  color: var(--color-text-muted);
}

.header-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  min-inline-size: 0;
}

.kb-field {
  display: flex;
  align-items: center;
  gap: 8px;
  min-inline-size: 0;
}

.kb-field__label {
  flex: 0 0 auto;
  color: var(--color-text-muted);
  font-size: var(--font-size-chat);
}

.kb-select-shell {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-inline-size: 0;
}

#kb-select {
  inline-size: 220px;
  max-inline-size: 32vw;
  min-inline-size: 0;
  padding: 0 86px 0 10px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  font-size: var(--font-size-chat);
}

.kb-version {
  position: absolute;
  inset-inline-end: 30px;
  color: #7a8784;
  font-size: var(--font-size-chat-small);
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
}

.kb-version:empty {
  display: none;
}

.auth-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  color: var(--color-text-muted);
  font-size: var(--font-size-chat);
  white-space: nowrap;
}

.auth-status__indicator {
  inline-size: 8px;
  block-size: 8px;
  border-radius: 4px;
  background: var(--color-warning);
}

.auth-status[data-status="authenticated"] .auth-status__indicator {
  background: var(--color-success);
}

.auth-status[data-status="failed"] .auth-status__indicator,
.auth-status[data-status="expired"] .auth-status__indicator {
  background: var(--color-error);
}

.auth-status[data-status="failed"],
.auth-status[data-status="expired"] {
  color: var(--color-error);
}

.release-notice {
  z-index: 1;
  grid-row: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-inline-size: 0;
  padding: 10px 20px;
  color: var(--color-text);
  border-block-end: 1px solid var(--color-border);
  background: #f7fbfa;
}

.release-notice[hidden] {
  display: none;
}

.release-notice__content {
  min-inline-size: 0;
}

.release-notice h2 {
  margin: 0 0 4px;
  font-size: var(--font-size-chat);
  font-weight: 650;
  line-height: 1.4;
}

.release-notice ul {
  display: flex;
  flex-wrap: wrap;
  gap: 3px 14px;
  margin: 0;
  padding-inline-start: 18px;
  color: var(--color-text-muted);
  font-size: var(--font-size-chat-small);
  line-height: 1.45;
}

.release-notice__close {
  flex: 0 0 auto;
  min-block-size: 32px;
  padding: 0 10px;
  color: var(--color-action);
  border: 1px solid var(--color-action);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  font-size: var(--font-size-chat-small);
  cursor: pointer;
}

.release-notice__close:hover {
  color: var(--color-surface);
  background: var(--color-action);
}

.icon-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  inline-size: 40px;
  block-size: 40px;
  padding: 0;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  cursor: pointer;
}

.icon-button:not(:disabled):hover {
  color: var(--color-action);
  border-color: var(--color-action);
  background: var(--color-surface-muted);
}

.icon-button--primary {
  color: var(--color-surface);
  border-color: var(--color-action);
  background: var(--color-action);
}

.icon-button--primary:not(:disabled):hover {
  color: var(--color-surface);
  border-color: var(--color-action-hover);
  background: var(--color-action-hover);
}

.icon-button--primary:disabled {
  color: var(--color-surface);
  -webkit-text-fill-color: var(--color-surface);
  border-color: #4c918b;
  background: #4c918b;
}

.icon-button svg {
  inline-size: 18px;
  block-size: 18px;
  pointer-events: none;
}

.tooltip {
  position: absolute;
  z-index: 10;
  inset-block-start: calc(100% + 7px);
  inset-inline-end: 0;
  inline-size: max-content;
  max-inline-size: 180px;
  padding: 4px 7px;
  color: var(--color-surface);
  border-radius: 4px;
  background: var(--color-text);
  font-size: 0.75rem;
  line-height: 1.3;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.tooltip--above {
  inset-block: auto calc(100% + 7px);
}

.tooltip-anchor:hover .tooltip,
.tooltip-anchor:focus-visible .tooltip {
  opacity: 1;
  visibility: visible;
}

.conversation {
  grid-row: 3;
  min-block-size: 0;
  min-inline-size: 0;
  overflow: hidden;
}

.conversation-scroll {
  block-size: 100%;
  min-inline-size: 0;
  padding: 24px max(18px, env(safe-area-inset-left)) 28px max(18px, env(safe-area-inset-right));
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.message-list {
  inline-size: min(100%, var(--content-width));
  min-inline-size: 0;
  margin: 0 auto;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  list-style: none;
}

.message {
  inline-size: fit-content;
  min-inline-size: 0;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  font-size: var(--font-size-chat);
  line-height: 1.5;
}

.message--user {
  max-inline-size: 78%;
  margin-inline-start: auto;
  background: #e6f3f1;
  border-color: #bedbd6;
}

.message--assistant {
  max-inline-size: 100%;
  margin-inline-end: auto;
  padding: 0;
}

.message__sources {
  inline-size: 100%;
  max-inline-size: none;
  min-inline-size: 0;
  margin-inline: 0;
  margin-block-start: 0;
  padding: 8px 12px 10px;
  color: var(--color-text-muted);
  border-block-start: 1px solid var(--color-border);
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.message__body,
.source-disclosure {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.message__body {
  white-space: pre-wrap;
}

.message__status-panel {
  inline-size: 100%;
  min-inline-size: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 12px 5px;
  color: var(--color-text-muted);
  border: 0;
  background: transparent;
  font-size: var(--font-size-answer);
  line-height: 1.5;
  list-style: none;
}

.message__status-step {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  min-inline-size: 0;
  padding: 0;
  overflow-wrap: anywhere;
}

.message__status-dot {
  inline-size: 15px;
  block-size: 15px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-text);
  animation: status-breath 1.15s ease-in-out infinite;
}

.message__status-text {
  min-inline-size: 0;
  overflow-wrap: anywhere;
}

.message__status-step--completed {
  color: var(--color-text-muted);
}

.message__status-step--current {
  color: var(--color-text);
  font-weight: 400;
}

.message__status-step--pending {
  color: #a3adaa;
}

.message__status-step--failed {
  color: var(--color-error);
  font-weight: 600;
}

.message__status-step--failed .message__status-dot {
  background: var(--color-error);
  animation: none;
}

@keyframes status-breath {
  0%,
  100% {
    opacity: 0.28;
    transform: scale(0.72);
  }

  50% {
    opacity: 1;
    transform: scale(1.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  .message__status-dot {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

.message--assistant .message__body {
  min-inline-size: 0;
}

.message--assistant .message__body--markdown {
  white-space: normal;
}

.message--assistant .message__body p,
.message--assistant .message__body ul,
.message--assistant .message__body ol,
.message--assistant .message__body li,
.message--assistant .message__body strong {
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.message--assistant .message__body > :first-child {
  margin-block-start: 0;
}

.message--assistant .message__body > :last-child {
  margin-block-end: 0;
}

.message--assistant .message__body p,
.message--assistant .message__body ul,
.message--assistant .message__body ol,
.message--assistant .message__body blockquote,
.message--assistant .message__body pre,
.message--assistant .message__body table {
  margin-block: 0 0.7rem;
}

.message--assistant .message__body h1,
.message--assistant .message__body h2,
.message--assistant .message__body h3,
.message--assistant .message__body h4,
.message--assistant .message__body h5,
.message--assistant .message__body h6 {
  margin-block: 0.85rem 0.45rem;
  font-size: var(--font-size-answer);
  line-height: 1.35;
}

.message--assistant .message__body ul,
.message--assistant .message__body ol {
  padding-inline-start: 1.35rem;
}

.message--assistant .message__body code {
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: var(--font-size-answer);
  overflow-wrap: anywhere;
}

.message--assistant .message__body pre {
  max-inline-size: 100%;
  padding: 8px 10px;
  overflow-x: auto;
  background: var(--color-surface-muted);
  border-radius: var(--radius-small);
}

.message--assistant .message__body pre code {
  overflow-wrap: normal;
  white-space: pre;
}

.message--assistant .message__body table {
  display: block;
  max-inline-size: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.message--assistant .message__body th,
.message--assistant .message__body td {
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  text-align: start;
  white-space: normal;
}

.message--assistant .message__body a {
  color: var(--color-action);
  overflow-wrap: anywhere;
}

.message--assistant > .message__body {
  padding: 10px 12px;
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.message__actions {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px 8px;
  color: var(--color-text-muted);
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.message__action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-block-size: 30px;
  padding: 3px 6px;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  background: transparent;
  cursor: pointer;
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.message__action:not(:disabled):hover {
  color: var(--color-action);
  border-color: var(--color-border);
  background: var(--color-surface-muted);
}

.message__action:disabled {
  opacity: 0.72;
}

.message__action svg {
  inline-size: 15px;
  block-size: 15px;
}

.source-disclosure__trigger,
.message__retry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-block-size: 36px;
  color: var(--color-action);
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  background: transparent;
  cursor: pointer;
  font-size: var(--font-size-answer);
  line-height: 1.5;
}

.source-disclosure__trigger {
  padding: 5px 0;
  border: 0;
}

.source-disclosure__trigger:hover,
.message__retry:hover {
  border-color: var(--color-border);
  background: var(--color-surface-muted);
}

.source-disclosure__content {
  margin: 6px 0 0;
  padding-inline-start: 0;
  overflow-wrap: anywhere;
  font-size: var(--font-size-answer);
  line-height: 1.5;
  list-style: none;
}

.source-disclosure__content a {
  color: var(--color-action);
  overflow-wrap: anywhere;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.message--failed {
  border-color: color-mix(in srgb, var(--color-error) 30%, var(--color-border));
}

.message__retry {
  margin: 8px 12px 10px;
  padding: 5px 8px;
  color: var(--color-error);
}

.empty-state {
  inline-size: min(100%, var(--content-width));
  margin: clamp(44px, 12vh, 104px) auto 0;
  color: var(--color-text-muted);
  text-align: center;
  font-size: var(--font-size-body);
}

.composer {
  z-index: 2;
  grid-row: 4;
  position: sticky;
  inset-block-end: 0;
  min-block-size: 72px;
  padding-block-start: 10px;
  padding-inline-end: max(18px, env(safe-area-inset-right));
  padding-block-end: max(12px, env(safe-area-inset-bottom));
  padding-inline-start: max(18px, env(safe-area-inset-left));
  border-block-start: 1px solid var(--color-border);
  background: var(--color-surface);
}

.composer__inner {
  inline-size: min(100%, var(--content-width));
  min-inline-size: 0;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 10px;
}

#question-input {
  display: block;
  inline-size: 100%;
  min-inline-size: 0;
  min-block-size: 48px;
  max-block-size: 128px;
  padding: 11px 12px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  font-size: var(--font-size-chat);
  line-height: 1.45;
  resize: none;
  overflow-y: auto;
  overflow-wrap: anywhere;
}

#question-input::placeholder {
  color: var(--color-text-disabled);
  opacity: 1;
}

#question-input:disabled::placeholder {
  color: var(--color-text-disabled);
  -webkit-text-fill-color: var(--color-text-disabled);
  opacity: 1;
}

[hidden] {
  display: none !important;
}

@media (max-width: 390px) {
  .app-header {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px 12px;
    padding: 9px 12px;
  }

  .brand-title {
    padding-block: 8px;
  }

  .header-controls {
    inline-size: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px;
  }

  .kb-field {
    min-inline-size: 0;
  }

  .kb-field__label {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  #kb-select {
    inline-size: 100%;
    max-inline-size: none;
  }

  .kb-select-shell {
    inline-size: 100%;
  }

  .conversation-scroll {
    padding: 18px max(12px, env(safe-area-inset-left)) 22px max(12px, env(safe-area-inset-right));
  }

  .release-notice {
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
  }

  .release-notice ul {
    display: block;
  }

  .composer {
    min-block-size: 68px;
    padding-inline-start: max(12px, env(safe-area-inset-left));
    padding-inline-end: max(12px, env(safe-area-inset-right));
  }

  .message__status-panel {
    gap: 8px;
    padding: 7px 12px 5px;
  }
}