/* One layout system: the conversation scrolls; controls occupy their own space. */
:root {
  color-scheme: dark;
  --bg: #141518;
  --surface: #1d1f23;
  --surface-2: #282b30;
  --text: #eceef2;
  --text-soft: #a6abb5;
  --gold: #d8bb7b;
  --gold-dim: #9e885f;
  --line: #2b2e33;
  --glass-border: #2b2e33;
  --error: #ffae9a;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
}
* {
  box-sizing: border-box;
}
[hidden],
.hidden {
  display: none !important;
}
html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}
body {
  height: 100vh;
  height: var(--viewport-height, 100dvh);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
button,
input,
textarea,
select {
  font: inherit;
}
button {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
button,
a,
summary,
input,
textarea,
select {
  touch-action: manipulation;
}
:focus-visible {
  outline: 2px solid #c0c7d2;
  outline-offset: 2px;
}
button {
  transition:
    background 0.15s,
    color 0.15s;
}
.hero {
  flex: 0 0 auto;
  padding: 8px 24px;
  border-bottom: 1px solid var(--line);
  z-index: 50;
}
.hero-inner {
  max-width: 1240px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.brand-row h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.6px;
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 4px;
}
.header-icon {
  width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border: 0;
  background: transparent;
  color: var(--text-soft);
  border-radius: 10px;
}
.header-icon:hover {
  background: var(--surface-2);
  color: var(--text);
}
.header-icon svg,
.learner-settings summary svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.session-toggle,
.quick-new-chat {
  display: none;
}
.app {
  width: 100%;
  max-width: 1288px;
  margin: auto;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.layout {
  flex: 1;
  min-height: 0;
  display: flex;
}
.side-panel {
  width: 238px;
  flex-shrink: 0;
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 30px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  background: #121316;
}
.panel-label {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.sessions-section {
  flex: 1;
  min-height: 0;
}
.sessions-wrap {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}
.subjects-section {
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 20px;
}
.subjects-section > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  gap: 5px 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-size: 13px;
}
.subjects-section > summary::-webkit-details-marker {
  display: none;
}
.subjects-section > summary:hover {
  background: var(--surface);
}
.subject-label {
  grid-column: 1;
  color: var(--text-soft);
  font-size: 11px;
}
#currentSubjectLabel {
  grid-column: 1;
  overflow-wrap: anywhere;
}
.subjects-section > summary svg {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.subjects-section[open] > summary svg {
  transform: rotate(180deg);
}
.subjects-section .subjects {
  padding-top: 6px;
}
.subjects-section:not([open]) > .subjects {
  display: none;
}
.subjects {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.chip {
  min-height: 44px;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-soft);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
}
.chip:hover,
.suggestion-chip:hover {
  background: var(--surface);
  color: var(--text);
}
.chip.active {
  background: var(--surface-2);
  color: var(--text);
}
.session-close {
  display: none;
}
.session-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.session-tools {
  margin-bottom: 12px;
}
.new-chat-btn {
  width: 100%;
  min-height: 44px;
  border: 1px solid #3a3d44;
  border-radius: 9px;
  background: transparent;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
}
.new-chat-btn:hover {
  background: var(--surface-2);
}
.session-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 32vh;
  overflow-y: auto;
  padding-bottom: 4px;
}
.session-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 40px;
  gap: 2px;
  align-items: center;
}
.session-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  min-height: 44px;
  padding: 10px;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-soft);
  font-size: 13px;
}
.session-item.active {
  background: var(--surface-2);
  color: var(--text);
}
.session-item:hover,
.session-menu-btn:hover,
.session-close:hover {
  background: var(--surface-2);
}
.session-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.session-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-dim);
  flex-shrink: 0;
}
.session-menu-btn,
.session-close {
  width: 40px;
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text-soft);
  font-size: 23px;
  align-items: center;
  justify-content: center;
}
.session-menu-btn {
  display: flex;
}
.session-menu-btn.open {
  background: var(--surface-2);
  color: var(--text);
}
.session-menu {
  grid-column: 1 / -1;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}
.session-menu button {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  background: transparent;
  color: var(--error);
  border: 0;
  border-radius: 7px;
  text-align: left;
  font-size: 13px;
}
.session-menu button:hover {
  background: #352525;
}
.session-backdrop {
  position: fixed;
  inset: 0;
  z-index: 90;
  border: 0;
  background: #0009;
}
.chat-panel {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
}
.chat-card {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.learner-settings {
  position: relative;
  flex-shrink: 0;
}
.learner-settings summary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  padding: 10px;
  border-radius: 9px;
  color: var(--text-soft);
  font-size: 12px;
  list-style: none;
}
.learner-settings summary::-webkit-details-marker,
.attach-menu summary::-webkit-details-marker {
  display: none;
}
.learner-settings[open] summary,
.learner-settings summary:hover {
  background: var(--surface-2);
  color: var(--text);
}
.preferences-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: min(340px, calc(100vw - 24px));
  padding: 18px;
  background: var(--surface);
  border: 1px solid #3a3d44;
  border-radius: 14px;
  box-shadow: 0 14px 36px #0005;
  max-height: calc(var(--viewport-height, 100dvh) - 90px);
  overflow-y: auto;
  z-index: 60;
}
.preferences-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.preferences-head h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}
.preferences-head .header-icon {
  margin: -10px -10px -10px 0;
  font-size: 22px;
}
.preferences-caption {
  margin: 12px 0 20px;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.6;
}
.learner-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.learner-fields label,
.learning-inline label {
  display: block;
  font-size: 12px;
  color: var(--text-soft);
}
.learner-fields select,
.learner-fields input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  margin-top: 8px;
  padding: 10px;
  border: 1px solid #41454d;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.optional-label {
  float: right;
  font-size: 11px;
}
.preferences-saved {
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: 11px;
  line-height: 1.5;
}
.guide-replay {
  margin: 4px 0 -6px -10px;
}
.onboarding-dialog:not([open]) {
  display: none;
}
.onboarding-dialog[open] {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 16px;
  border: 0;
  color: var(--text);
  background: #07090caa;
}
.onboarding-dialog::backdrop {
  background: transparent;
}
.onboarding-panel {
  width: min(100%, 460px);
  max-height: calc(var(--viewport-height, 100dvh) - 32px);
  overflow-y: auto;
  padding: 24px;
  border: 1px solid #3a3e46;
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 20px 60px #0005;
}
.guide-header,
.guide-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.guide-header {
  margin: -8px -8px 12px 0;
}
#guideProgress {
  color: var(--text-soft);
  font-size: 12px;
}
#guideTitle {
  margin: 0 0 12px;
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.3;
}
#guideTitle:focus {
  outline: none;
}
.guide-description {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.65;
}
.guide-language label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-soft);
}
.guide-language select {
  width: 100%;
  min-width: 0;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid #565e6c;
  border-radius: 9px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.guide-language-help,
.guide-note {
  margin: 10px 0 20px;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.6;
}
.guide-location {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 10px;
  background: #26292f;
  font-size: 12px;
  line-height: 1.6;
}
#guideIcon {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--text);
  font-size: 11px;
}
#guideIcon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.guide-points {
  padding-left: 18px;
  margin: 18px 0;
  font-size: 13px;
  line-height: 1.7;
}
.guide-points li + li {
  margin-top: 9px;
}
.guide-more {
  border-top: 1px solid var(--line);
  color: var(--text-soft);
}
.guide-more > summary {
  min-height: 44px;
  padding: 12px 0;
  font-size: 12px;
  cursor: pointer;
}
.guide-more > .guide-points {
  margin: 4px 0 16px;
}
.guide-note {
  margin: 16px 0 20px;
}
.guide-footer {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.guide-next {
  margin-left: auto;
  min-height: 44px;
  padding: 10px 18px;
  border: 0;
  border-radius: 9px;
  background: #e1e3e7;
  color: #191b20;
  font-size: 13px;
  font-weight: 500;
}
@media (max-width: 400px) {
  .onboarding-panel {
    padding: 18px;
  }
  #guideTitle {
    font-size: 21px;
  }
}
.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #424651 transparent;
  padding: 28px max(24px, calc((100% - 800px) / 2)) 32px;
  scroll-padding-top: 24px;
}
.messages.empty-conversation {
  display: flex;
  flex-direction: column;
}
.empty-state {
  width: 100%;
  max-width: 540px;
  margin: auto;
  padding: 24px 0 36px;
}
.empty-state h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.25;
  font-weight: 500;
  letter-spacing: -0.8px;
  color: var(--text);
}
.empty-state h2 span {
  color: var(--gold);
}
.welcome-description {
  margin: 14px 0 28px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-soft);
  max-width: 360px;
}
.suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.suggestion-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 64px;
  padding: 16px;
  border: 1px solid #35383f;
  border-radius: 12px;
  background: transparent;
  color: #c8ccd3;
  font-size: 13px;
  line-height: 1.5;
  text-align: left;
}
.suggestion-arrow {
  color: var(--text-soft);
  flex-shrink: 0;
}
.msg-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-width: 0;
  margin-bottom: 28px;
}
.msg-row:last-child {
  margin-bottom: 0;
}
.msg-row.user {
  justify-content: flex-end;
}
.avatar {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}
.avatar.bot img {
  display: block;
  width: 26px;
  height: 26px;
  object-fit: contain;
}
.msg {
  min-width: 0;
  max-width: 100%;
  font-size: 15px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
.msg.bot {
  flex: 1;
  padding: 0;
}
.msg.user {
  max-width: 85%;
  padding: 10px 16px;
  background: #272d3a;
  border: 1px solid #363c49;
  border-radius: 18px 18px 5px 18px;
  white-space: pre-wrap;
}
.msg.error {
  padding: 12px 0;
  background: transparent;
  color: var(--text-soft);
  border: 0;
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
}
.msg img.attached-photo {
  display: block;
  max-width: 100%;
  max-height: 220px;
  border-radius: 10px;
  margin-bottom: 10px;
  object-fit: contain;
}
.answer-content {
  white-space: normal;
}
.answer-content > :first-child {
  margin-top: 0;
}
.answer-content > :last-child {
  margin-bottom: 0;
}
.answer-content p {
  margin: 0 0 1em;
}
.answer-content .answer-heading {
  margin: 1.5em 0 0.6em;
  font-family: var(--font);
  font-size: 1.13em;
  line-height: 1.4;
  font-weight: 650;
  letter-spacing: -0.015em;
  color: #fff;
}
.answer-content h2.answer-heading {
  font-size: 1.22em;
}
.answer-content strong {
  color: #fff;
  font-weight: 650;
}
.answer-content ul,
.answer-content ol {
  margin: 0.65em 0 1.2em;
  padding-left: 1.5em;
}
.answer-content li {
  margin: 0.55em 0;
  padding-left: 0.25em;
}
.answer-content li::marker {
  color: var(--gold);
}
.answer-content li > p {
  margin: 0.35em 0;
}
.answer-content li > ul,
.answer-content li > ol {
  margin: 0.35em 0;
}
.answer-content a {
  color: #e8c978;
  text-underline-offset: 3px;
}
.answer-content blockquote {
  margin: 1em 0;
  padding: 10px 16px;
  border-left: 3px solid var(--gold-dim);
  background: #1b1b19;
  color: #c5c8ce;
  border-radius: 0 8px 8px 0;
}
.answer-content blockquote p:last-child {
  margin-bottom: 0;
}
.answer-content hr,
.answer-divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 1.5em 0;
}
.inline-code {
  background: var(--surface-2);
  color: #f0d49a;
  padding: 0.12em 0.35em;
  border-radius: 5px;
  font-size: 0.9em;
}
.answer-code {
  margin: 1em 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: #16181d;
}
.code-language {
  padding: 7px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  color: var(--text-soft);
}
.answer-code pre {
  margin: 0;
  padding: 14px 16px;
  white-space: pre;
  overflow-x: auto;
  line-height: 1.65;
}
.answer-code code,
.inline-code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9em;
}
.answer-math-display {
  overflow-x: auto;
  max-width: 100%;
  padding: 12px 16px;
  margin: 1em 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.answer-content mjx-container {
  max-width: 100%;
  color: var(--text);
}
.answer-content mjx-container[display='true'] {
  overflow-x: auto;
  overflow-y: hidden;
  margin: 0.5em 0 !important;
}
.answer-table-wrap {
  margin: 1.2em 0;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.answer-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9em;
  text-align: left;
}
.answer-table th,
.answer-table td {
  padding: 12px 14px;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  min-width: 110px;
}
.answer-table th {
  background: var(--surface-2);
  font-weight: 600;
  color: #f1dab0;
}
.answer-table td {
  background: #16181c;
}
.answer-table tbody tr:last-child td {
  border-bottom: 0;
}
.table-mobile-label {
  display: none;
}
.answer-fallback {
  white-space: pre-wrap;
}
.answer-tip {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  background: #242117;
  font-size: 0.9em;
}
.tip-icon {
  flex-shrink: 0;
  font-weight: 600;
}
.answer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-top: 14px;
  padding-top: 6px;
}
.answer-action {
  min-height: 44px;
  padding: 8px 10px;
  color: var(--text-soft);
  border: 1px solid transparent;
  background: transparent;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.4;
}
.answer-action:hover,
.answer-action.speaking {
  color: var(--text);
  background: var(--surface-2);
}
.msg.user > .message-tools {
  justify-content: flex-end;
  margin-top: 4px;
  padding-top: 0;
}
.msg.user.editing {
  width: min(100%, 620px);
}
.edit-panel,
.copy-panel {
  text-align: left;
}
.edit-panel textarea,
.copy-panel textarea {
  min-width: 0;
  line-height: 1.6;
}
.question-text {
  white-space: pre-wrap;
}
.message-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  min-height: 36px;
  min-width: 44px;
  margin: 4px 0 -4px;
  padding: 0 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-soft);
  line-height: 1;
}
.study-tools {
  display: inline-block;
  vertical-align: middle;
  margin: 8px 4px 0 0;
  max-width: 100%;
}
.study-tools > summary {
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--text-soft);
  font-size: 12px;
  cursor: pointer;
  list-style: none;
}
.study-tools > summary::-webkit-details-marker {
  display: none;
}
.study-tools > summary::after {
  content: '⌄';
}
.study-tools[open] > summary::after {
  content: '⌃';
}
.study-tools > summary:hover {
  color: var(--text);
  background: var(--surface-2);
}
.study-tools-actions {
  display: flex;
  flex-wrap: wrap;
  max-width: 380px;
  gap: 4px;
  padding: 6px 0;
}
.study-tools:not([open]) > .study-tools-actions {
  display: none;
}
.msg.user .message-more {
  display: flex;
  margin-left: auto;
}
.message-more:hover,
.message-more:focus-visible {
  background: var(--surface-2);
  color: var(--text);
}
.message-menu-dialog:not([open]) {
  display: none;
}
.message-menu-dialog[open] {
  position: fixed;
  inset: 0;
  z-index: 230;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 12px;
  border: 0;
  background: transparent;
  color: var(--text);
}
.message-menu-dialog::backdrop {
  background: transparent;
}
.message-menu-panel {
  position: fixed;
  width: min(calc(100% - 24px), 220px);
  max-height: calc(var(--viewport-height, 100dvh) - 24px);
  overflow-y: auto;
  border: 1px solid #3a3e46;
  border-radius: 12px;
  background: var(--surface);
  padding: 6px;
  box-shadow: 0 8px 28px #0005;
}
.message-menu-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 12px;
  gap: 10px;
}
.message-menu-heading h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
}
.message-menu-items {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}
.message-menu-action {
  min-height: 46px;
  padding: 12px;
  border: 0;
  border-radius: 9px;
  color: var(--text);
  background: transparent;
  text-align: left;
  font-size: 13px;
}
.message-menu-action:hover,
.message-menu-action:focus-visible {
  background: var(--surface-2);
}
@media (hover: hover) and (pointer: fine) {
  .message-more {
    opacity: 0;
  }
  .msg:hover > .message-more,
  .msg:focus-within > .message-more {
    opacity: 1;
  }
}
@media (pointer: coarse) {
  .msg.menu-enabled:not(.selectable) {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
  }
  .msg.menu-enabled :is(input, textarea, pre, code, a),
  .msg.menu-enabled.selectable {
    -webkit-user-select: text;
    user-select: text;
  }
  .message-more {
    min-height: 44px;
  }
}
.primary-action {
  color: var(--text);
  border-color: #41454d;
}
.learning-inline {
  margin-top: 12px;
  padding: 16px;
  border: 1px solid #393d44;
  border-radius: 12px;
  background: var(--surface);
}
.learning-inline textarea {
  width: 100%;
  display: block;
  min-height: 80px;
  margin: 8px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  resize: vertical;
  font-size: 16px;
}
.learning-inline .answer-actions {
  border: 0;
  padding: 0;
  margin: 10px 0;
}
.practice-label {
  display: block;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.practice-status,
.learning-hint,
.learning-error {
  display: block;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.6;
}
.learning-error {
  color: var(--error);
}
.typing-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
}
.typing {
  display: flex;
  gap: 10px;
  align-items: center;
}
.typing-label {
  font-size: 13px;
  color: var(--text-soft);
}
.typing-dots {
  display: flex;
  gap: 4px;
}
.typing-dots span {
  width: 5px;
  height: 5px;
  background: var(--gold);
  border-radius: 50%;
  animation: breathe 1.3s infinite;
}
.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}
.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}
@keyframes breathe {
  50% {
    opacity: 0.3;
  }
}
.preview-row,
.mode-row,
.input-row {
  flex-shrink: 0;
  width: calc(100% - 48px);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.preview-row {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}
.preview-row.active {
  display: flex;
}
.preview-thumb {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
}
.photo-preview-button {
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 9px;
  flex-shrink: 0;
  line-height: 0;
}
.message-photo {
  display: block;
  max-width: 100%;
  padding: 6px;
  margin-bottom: 8px;
  border: 1px solid #454b58;
  border-radius: 12px;
  color: var(--text);
  background: #1c2029;
  text-align: left;
}
.message-photo:disabled {
  opacity: 1;
}
.message-photo img.attached-photo {
  max-height: 210px;
  margin: 0;
  object-fit: contain;
}
.message-photo span {
  display: block;
  padding: 5px 6px 1px;
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-soft);
  white-space: normal;
}
.app-notice {
  flex-shrink: 0;
  margin: 4px auto;
  width: calc(100% - 32px);
  max-width: 800px;
  max-height: 66px;
  overflow-y: auto;
  color: var(--gold);
  font-size: 12px;
  line-height: 1.5;
}
.photo-viewer:not([open]) {
  display: none;
}
.photo-viewer {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(980px, 100%);
  max-width: 100%;
  height: min(900px, 100dvh);
  max-height: 100dvh;
  padding: 0;
  border: 1px solid #3a3e47;
  border-radius: 16px;
  background: #111317;
  color: var(--text);
  z-index: 200;
  overflow: hidden;
}
.photo-viewer::backdrop {
  background: #000c;
}
.photo-viewer-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}
.photo-viewer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(10px, env(safe-area-inset-top)) 16px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.photo-viewer button {
  min-width: 44px;
  min-height: 44px;
  border: 1px solid #3c424d;
  background: #22262d;
  border-radius: 10px;
  color: var(--text);
  padding: 8px 12px;
  font-size: 13px;
}
#photoViewClose {
  font-size: 23px;
}
.photo-view-stage {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 12px;
  background: #090a0d;
  touch-action: pan-x pan-y pinch-zoom;
}
#viewerPhoto {
  display: block;
  max-width: none;
  height: auto;
  margin: auto;
}
.photo-view-tools {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 7px;
  padding: 10px 8px max(10px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
}
#photoZoomLabel {
  font-size: 12px;
  min-width: 38px;
  text-align: center;
}
#photoReuse {
  color: var(--gold);
}
.preview-label {
  flex: 1;
  font-size: 12px;
  color: var(--text-soft);
}
.preview-remove {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 20px;
}
.mode-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 2px 8px;
}
.mode-label {
  font-size: 11px;
  color: var(--text-soft);
}
.mode-switch {
  display: flex;
  gap: 2px;
}
.mode-btn {
  min-height: 38px;
  padding: 7px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-soft);
  font-size: 12px;
}
.mode-btn.active {
  background: var(--surface-2);
  color: var(--text);
}
.input-row {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px 44px;
  align-items: end;
  gap: 2px;
  padding: 8px;
  border: 1px solid #41454d;
  border-radius: 18px;
  background: var(--surface);
  margin-bottom: 4px;
}
.input-row:focus-within {
  border-color: #737b87;
}
#input {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  min-width: 0;
  min-height: 44px;
  max-height: 110px;
  padding: 10px 6px;
  border: 0;
  background: transparent;
  color: var(--text);
  resize: none;
  font-size: 16px;
  line-height: 1.5;
  outline: none;
}
#input::placeholder {
  color: #a6abb5;
}
.icon-btn,
button.send {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: #b3b9c5;
}
.icon-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}
.icon-btn.listening {
  color: var(--error);
  background: #412a25;
}
#micBtn {
  grid-column: 3;
  grid-row: 1;
}
button.send {
  grid-column: 4;
  grid-row: 1;
  background: #e1e3e7;
  color: #191b20;
  font-size: 0;
}
button.send::after {
  content: '↑';
  font-size: 24px;
  font-weight: 500;
}
button.send:hover:not(:disabled) {
  background: #fff;
}
.attach-menu {
  grid-column: 1;
  grid-row: 1;
}
.attach-menu summary {
  cursor: pointer;
  list-style: none;
}
.attach-options {
  position: absolute;
  z-index: 40;
  bottom: calc(100% + 10px);
  left: 0;
  min-width: 194px;
  padding: 6px;
  border: 1px solid #41454d;
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 10px 28px #0005;
}
.attach-options .icon-btn {
  justify-content: flex-start;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  font-size: 13px;
  border-radius: 8px;
}
.visually-hidden-file,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
footer {
  flex-shrink: 0;
  text-align: center;
  font-size: 10px;
  line-height: 1.6;
  color: var(--text-soft);
  padding: 5px 12px max(7px, env(safe-area-inset-bottom));
}
.credit {
  color: var(--text-soft);
}
@media (min-width: 761px) {
  .attach-options .camera-btn {
    display: none;
  }
  .session-backdrop {
    display: none;
  }
}
@media (max-width: 760px) {
  .hero {
    padding: 5px 12px;
  }
  .brand-row {
    gap: 8px;
  }
  .brand-row h1 {
    font-size: 18px;
  }
  .brand-mark {
    width: 24px;
    height: 24px;
  }
  .session-toggle,
  .quick-new-chat {
    display: inline-flex;
  }
  .preferences-label {
    display: none;
  }
  .layout {
    flex-direction: column;
  }
  .side-panel {
    width: 0;
    height: 0;
    flex: 0 0 0;
    overflow: visible;
    padding: 0;
    border: 0;
  }
  .sessions-wrap {
    position: fixed;
    z-index: 100;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(340px, 88vw);
    min-height: 0;
    overflow-y: auto;
    padding: max(16px, env(safe-area-inset-top)) 14px max(20px, env(safe-area-inset-bottom));
    background: #191b20;
    border-right: 1px solid #3a3e47;
    display: flex;
    flex-direction: column;
    visibility: hidden;
    transform: translateX(-100%);
    transition:
      transform 0.2s ease,
      visibility 0.2s;
  }
  .sessions-wrap.open {
    visibility: visible;
    transform: translateX(0);
  }
  .session-close {
    display: flex;
  }
  .session-header-row {
    margin-bottom: 16px;
  }
  .session-header-row .panel-label {
    margin: 0;
  }
  .session-header-row,
  .session-tools {
    flex-shrink: 0;
  }
  .session-list {
    flex: 1 1 auto;
    max-height: none;
    min-height: 88px;
  }
  .session-menu-btn {
    width: 40px;
  }
  .messages {
    padding: 24px 20px;
    scroll-padding-top: 18px;
  }
  .empty-state {
    padding: 24px 0;
    max-width: 400px;
  }
  .empty-state h2 {
    font-size: 28px;
  }
  .welcome-description {
    font-size: 13px;
    margin-bottom: 24px;
  }
  .suggestions {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .suggestion-chip {
    min-height: 54px;
    padding: 12px 14px;
  }
  .msg-row {
    gap: 0;
    margin-bottom: 26px;
  }
  .msg-row > .avatar {
    display: none;
  }
  .msg {
    font-size: 15px;
    line-height: 1.75;
  }
  .msg.user {
    max-width: 92%;
    font-size: 14px;
    padding: 10px 14px;
  }
  .answer-content .answer-heading {
    font-size: 1.12em;
  }
  .answer-action {
    min-height: 44px;
    padding: 9px 10px;
  }
  .answer-table-cards {
    border: 0;
    border-radius: 0;
    overflow: visible;
  }
  .answer-table-cards thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }
  .answer-table-cards table,
  .answer-table-cards tbody {
    display: block;
  }
  .answer-table-cards tbody tr {
    display: block;
    padding: 13px 14px;
    margin-bottom: 10px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
  }
  .answer-table-cards td {
    display: block;
    min-width: 0;
    padding: 0;
    margin: 0 0 9px;
    border: 0;
    background: transparent;
  }
  .answer-table-cards td:last-child {
    margin-bottom: 0;
  }
  .answer-table-cards .table-mobile-label {
    display: block;
    margin-bottom: 1px;
    color: var(--gold);
    font-size: 10px;
    line-height: 1.6;
    letter-spacing: 0.035em;
    font-weight: 600;
  }
  .answer-table-cards .table-cell-value {
    text-align: left !important;
  }
  .answer-table-numbered tbody tr {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 4px 10px;
  }
  .answer-table-numbered td {
    margin: 0;
  }
  .answer-table-numbered td:first-child {
    grid-column: 1;
    grid-row: 1;
    color: var(--gold);
  }
  .answer-table-numbered td:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
    font-weight: 600;
    color: #fff;
  }
  .answer-table-numbered td:nth-child(3) {
    grid-column: 2;
    grid-row: 2;
  }
  .answer-table-numbered .table-mobile-label {
    display: none;
  }
  .preview-row,
  .mode-row,
  .input-row {
    width: calc(100% - 24px);
  }
  .mode-row {
    padding: 2px 2px 6px;
    gap: 10px;
  }
  .mode-btn {
    min-height: 38px;
    padding: 5px 12px;
  }
  .input-row {
    padding: 6px;
    border-radius: 16px;
  }
  #input {
    max-height: 86px;
  }
  footer {
    padding-top: 3px;
    padding-bottom: max(4px, env(safe-area-inset-bottom));
    font-size: 9px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}