:root {
  color-scheme: light;
  --page: #fff;
  --ink: #222;
  --muted: #777;
  --line: #eee;
  --panel: #ffffff;
  --user: #369;
  --tutor: #ffffff;
  --accent: #eb6864;
  --accent-soft: #fff1f0;
  --coral: #f57a00;
  --shadow: 0 18px 50px rgb(34 34 34 / 10%);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 88%), rgb(248 249 250 / 96%)),
    radial-gradient(circle at top left, rgb(235 104 100 / 12%), transparent 34%),
    var(--page);
  color: var(--ink);
  font-family: var(--bs-body-font-family);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.superadmin-shell {
  min-height: 100vh;
  padding: 28px 18px;
}

.superadmin-sheet {
  width: min(100%, 1120px);
  margin: 0 auto;
}

.superadmin-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.superadmin-header h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(2rem, 4vw, 3.25rem);
}

.superadmin-kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
}

.superadmin-card {
  border-radius: 8px;
  box-shadow: 0 14px 36px rgb(34 34 34 / 7%);
}

.superadmin-user-list {
  max-height: min(68vh, 720px);
  overflow: auto;
}

.superadmin-user-list .list-group-item {
  border-left: 0;
  border-right: 0;
}

.superadmin-user-list .list-group-item:first-child {
  border-top: 0;
}

.superadmin-user-list .list-group-item:last-child {
  border-bottom: 0;
}

.superadmin-dl dt {
  color: var(--muted);
  font-weight: 700;
}

.superadmin-dl dd {
  overflow-wrap: anywhere;
}

.superadmin-key-form {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.chat-workspace {
  width: min(100%, 980px);
  height: min(860px, calc(100vh - 48px));
  min-height: 620px;
}

.chat-workspace.has-toolbar {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 8px;
}

.chat-toolbar {
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 4px;
}

.chat-layout {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 45px rgb(34 34 34 / 8%);
}

.chat-menu-button,
.translator-button {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  color: #aaa;
  text-decoration: none;
}

.chat-menu-button:hover,
.chat-menu-button:focus,
.translator-button:hover,
.translator-button:focus {
  outline: 0;
  background: var(--accent-soft);
  color: var(--accent);
}

.conversation-panel {
  width: min(86vw, 360px);
  border-right: 1px solid var(--line);
}

.conversation-panel .offcanvas-header {
  align-items: center;
  padding: 20px 22px 12px;
}

.conversation-panel .offcanvas-title {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.45rem;
  letter-spacing: 0;
}

.conversation-panel .offcanvas-body {
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 6px 14px 18px;
}

.conversation-panel,
.conversation-panel a,
.conversation-panel button,
.conversation-panel input,
.conversation-panel textarea,
.conversation-panel select,
.conversation-panel .dropdown-item {
  font: inherit;
}

.panel-home-link {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
}

.panel-home-link:hover,
.panel-home-link:focus {
  background: var(--accent-soft);
  color: var(--accent);
}

.panel-home-logo {
  display: block;
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.panel-nav-brand-logo {
  display: block;
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.panel-nav {
  display: grid;
  gap: 4px;
  margin-bottom: 14px;
}

.panel-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.panel-nav-link:hover,
.panel-nav-link:focus,
.panel-nav-link.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.panel-section-label {
  margin: 0 0 8px;
  padding: 0 10px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.panel-recents {
  min-height: 0;
  flex: 1 1 auto;
  overflow-y: auto;
  padding-right: 4px;
}

.panel-bottom {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid rgb(31 111 139 / 10%);
}

@media (min-width: 992px) {
  .chat-workspace.has-toolbar {
    width: min(100%, 1240px);
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr);
    gap: 16px;
    align-items: stretch;
  }

  .chat-toolbar {
    display: none;
  }

  .conversation-panel {
    position: static;
    transform: none;
    visibility: visible;
    width: 100%;
    height: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 16px 45px rgb(34 34 34 / 8%);
  }

  .conversation-panel .offcanvas-body {
    height: 100%;
  }

  .chat-workspace > :not(.conversation-panel):not(.chat-toolbar) {
    min-width: 0;
    grid-column: 2;
    grid-row: 1;
  }
}

.user-menu {
  position: relative;
}

.user-panel-button {
  display: inline-flex;
  width: 100%;
  justify-content: flex-start;
  text-align: left;
}

.conversation-list {
  display: grid;
  gap: 4px;
}

.conversation-item {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
}

.practice-modules-view {
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  padding: 28px 32px 34px;
  background: var(--bs-card-bg);
  border: var(--bs-border-width) solid var(--bs-border-color-translucent);
  border-radius: var(--bs-card-border-radius);
  box-shadow: var(--bs-box-shadow-sm);
}

.practice-modules-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.practice-modules-header-has-close {
  position: relative;
  padding-right: 52px;
}

.practice-modules-header-detail {
  width: 100%;
  max-width: none;
  margin: 0 0 24px;
  padding-top: 0;
  padding-bottom: 0;
  padding-left: 0;
}

.practice-modules-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.practice-module-close-button {
  flex: 0 0 auto;
  text-decoration: none;
}

.practice-modules-header-has-close .practice-modules-header-actions {
  position: absolute;
  top: 0;
  right: 0;
}

.practice-modules-kicker,
.practice-module-card-kicker,
.practiceModule-start-kicker {
  margin: 0 0 6px;
  color: var(--bs-secondary-color);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.practice-modules-title {
  margin: 0 0 8px;
}

.practice-modules-copy {
  max-width: 700px;
  margin: 0;
  color: var(--bs-secondary-color);
}

.practiceModule-filter-form {
  margin: 18px 0 20px;
}

.practice-module-filter-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 560px;
}

.practice-module-filter-input {
  min-width: 0;
}

.practice-module-filter-clear {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.practice-module-filter-clear:hover,
.practice-module-filter-clear:focus {
  color: var(--accent);
}

.practice-modules-grid,
.practice-module-chat-list {
  display: grid;
  gap: 14px;
}

.practice-modules-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.practice-module-card,
.practice-module-chat-item {
  color: inherit;
  text-decoration: none;
}

.practice-module-card-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  z-index: 2;
}

.practice-module-card-actions form {
  margin: 0;
}

.practice-module-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.practice-module-chat-count-badge {
  white-space: nowrap;
}

.practice-module-shared-badge {
  font-size: 0.74rem;
  font-weight: 600;
}

.practice-module-card h2,
.practiceModule-start-title {
  margin: 0;
}

.practice-module-card-title {
  position: relative;
  z-index: 1;
}

.practice-module-card-link {
  display: inline;
}

.practice-module-card p:last-child,
.practiceModule-start-description {
  margin: 0;
  color: var(--bs-secondary-color);
}

.practice-module-markdown {
  color: var(--muted);
  line-height: 1.6;
}

.practice-module-markdown > :first-child {
  margin-top: 0;
}

.practice-module-markdown > :last-child {
  margin-bottom: 0;
}

.practice-module-markdown ul,
.practice-module-markdown ol {
  padding-left: 1.2rem;
}

.practice-module-markdown li + li {
  margin-top: 0.35rem;
}

.practice-module-detail-inline-actions {
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.practice-module-detail-inline-actions form {
  margin: 0;
}

.practice-module-detail-shell {
  margin: 0 0 24px;
}

.practiceModule-section-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.practice-module-form-shell {
  display: grid;
}

.practice-module-form-card {
  max-width: 860px;
}

.practice-module-form {
  display: grid;
  gap: 14px;
}

.practice-module-start-form {
  margin: 0;
}

.practice-module-chat-item {
  color: inherit;
  text-decoration: none;
}

.practice-module-chat-title {
  font-weight: 600;
}

.practice-module-chat-list.list-group {
  display: block;
  gap: 0;
}

.profiles-list {
  display: grid;
  gap: 16px;
}

.profile-card.is-active {
  border-color: var(--bs-primary-border-subtle);
  background: var(--bs-light-bg-subtle);
}

.profile-card-actions {
  margin-top: 1rem;
}

.profile-card-actions form {
  margin: 0;
}

.practice-module-chat-date {
  color: var(--muted);
  font-size: 0.9rem;
}

.practice-module-empty,
.practice-module-empty-state {
  color: var(--bs-secondary-color);
}

.practice-module-modal-body {
  display: grid;
  gap: 12px;
}

.practice-module-form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 8px;
}

.practice-module-collection-picker-list {
  max-height: 320px;
  overflow: auto;
}

.practice-module-help-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.practice-module-help-button {
  padding: 0;
  color: var(--bs-primary);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.practice-module-help-button:hover,
.practice-module-help-button:focus {
  color: var(--bs-primary-text-emphasis);
  text-decoration: underline;
}

.practice-module-help-modal-body {
  display: grid;
  gap: 18px;
}

.practice-module-help-section {
  display: grid;
  gap: 8px;
}

.practice-module-help-section h3 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.15rem;
}

.practice-module-help-section ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.practice-module-help-section li + li {
  margin-top: 0.45rem;
}

.practice-module-start-panel {
  display: grid;
  gap: 12px;
  margin: 0 0 22px;
  padding: 20px 22px;
}

.practice-module-start-panel .btn {
  justify-self: start;
}

.practice-module-start-status {
  margin: 0;
  font-size: 0.98rem;
}

.conversation-open-button {
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 9px;
  padding: 11px 8px 11px 10px;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
}

.conversation-open-icon {
  font-size: 0.92rem;
  line-height: 1.4;
  opacity: 0.9;
}

.conversation-open-copy {
  min-width: 0;
}

.conversation-open-button:hover,
.conversation-open-button:focus,
.conversation-item.is-active {
  outline: 0;
  background: var(--accent-soft);
  color: var(--accent);
}

.conversation-open-button:hover,
.conversation-open-button:focus {
  border-radius: 8px 0 0 8px;
}

.conversation-title {
  display: block;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.conversation-date {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.78rem;
}

.conversation-item.is-active .conversation-date {
  color: inherit;
  opacity: 0.72;
}

.conversation-actions {
  padding-right: 4px;
}

.conversation-actions-button {
  width: 32px;
  height: 32px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  color: #aaa;
  text-decoration: none;
}

.conversation-actions-button:hover,
.conversation-actions-button:focus,
.conversation-actions-button[aria-expanded="true"] {
  outline: 0;
  background: rgb(235 104 100 / 10%);
  color: var(--accent);
}

.conversation-actions-menu {
  min-width: 150px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 30px rgb(34 34 34 / 12%);
}

.conversation-actions-menu .dropdown-item {
  border-radius: 6px;
}

.conversation-rename-form {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 6px;
  align-items: center;
  padding: 7px 4px 7px 10px;
}

.conversation-rename-input {
  min-width: 0;
  height: 34px;
  border: 0;
  border-bottom: 1px solid var(--accent);
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
}

.conversation-rename-action {
  width: 32px;
  height: 32px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
}

.conversation-rename-action:hover,
.conversation-rename-action:focus {
  outline: 0;
  background: var(--accent-soft);
  color: var(--accent);
}

.conversation-item.is-renaming > :not(.conversation-rename-form) {
  display: none;
}

.conversation-empty {
  margin: 0;
  padding: 10px;
  color: var(--muted);
}

.delete-conversation-modal {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.translator-modal {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.credit-modal {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.translator-mode {
  margin-bottom: 16px;
}

.translator-label {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.translator-box {
  position: relative;
}

.translator-result-box {
  margin-top: 16px;
}

.translator-textarea {
  min-height: 132px;
  padding-right: 42px;
  resize: vertical;
}

.translator-result {
  min-height: 88px;
  padding: 14px 42px 14px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgb(34 34 34 / 2%);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.08rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.translator-copy-button {
  width: 30px;
  height: 30px;
  position: absolute;
  right: 7px;
  bottom: 7px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 7px;
  background: rgb(255 255 255 / 80%);
  color: rgb(34 34 34 / 54%);
}

.translator-copy-button:hover,
.translator-copy-button:focus {
  outline: 0;
  background: var(--accent-soft);
  color: var(--accent);
}

.translator-copy-button.is-copied {
  background: var(--accent-soft);
  color: var(--accent);
}

.translator-result:empty::before {
  color: var(--muted);
  content: "La traducción aparecerá aquí.";
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.95rem;
}

.user-menu-button {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  color: #aaa;
  text-decoration: none;
}

.chat-menu-button,
.translator-button,
.conversation-actions-button,
.user-menu-button,
.message-action-button,
.conversation-rename-action,
.new-conversation-button {
  background: transparent;
  border: 0;
  border-color: transparent;
  box-shadow: none;
  text-decoration: none;
}

.chat-menu-button:hover,
.chat-menu-button:focus,
.translator-button:hover,
.translator-button:focus,
.conversation-actions-button:hover,
.conversation-actions-button:focus,
.user-menu-button:hover,
.user-menu-button:focus,
.message-action-button:hover,
.message-action-button:focus,
.conversation-rename-action:hover,
.conversation-rename-action:focus {
  border-color: transparent;
  box-shadow: none;
  text-decoration: none;
}

.chat-menu-button:not(:hover):not(:focus):not([aria-expanded="true"]),
.translator-button:not(:hover):not(:focus),
.conversation-actions-button:not(:hover):not(:focus):not([aria-expanded="true"]),
.user-menu-button:not(:hover):not(:focus):not([aria-expanded="true"]),
.message-action-button:not(:hover):not(:focus),
.conversation-rename-action:not(:hover):not(:focus),
.new-conversation-button:not(:hover):not(:focus) {
  background: transparent;
}

.user-menu-button:hover,
.user-menu-button:focus,
.user-menu-button[aria-expanded="true"] {
  outline: 0;
  background: var(--accent-soft);
  color: var(--accent);
}

.user-menu-panel {
  min-width: 220px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgb(34 34 34 / 12%);
}

.user-menu-email {
  margin: 0 0 6px;
  padding: 4px 8px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  overflow-wrap: anywhere;
}

.user-menu-panel .dropdown-item {
  border-radius: 6px;
  color: var(--ink);
}

.user-menu-panel .dropdown-item:hover,
.user-menu-panel .dropdown-item:focus {
  background: var(--accent-soft);
  color: var(--accent);
}

.send-button {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border-radius: 8px;
  flex: 0 0 auto;
}

.messages {
  overflow-y: auto;
  padding: 28px 46px;
  background: #fff;
}

.message-row {
  display: block;
  margin-bottom: 22px;
}

.message-speaker-label {
  margin: 0 0 0.45rem;
  font-family: var(--bs-body-font-family);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.message-row.is-tool-status {
  margin-bottom: 14px;
}

.tool-status-bubble {
  max-width: min(100%, 760px);
  padding: 0.25rem 0.25rem 0.25rem 0.85rem;
  font-family: var(--bs-body-font-family);
}

.inline-character-turn {
  margin-top: 0.85rem;
  padding: 0.78rem 0.9rem 0.82rem;
  border: 1px solid rgb(34 34 34 / 10%);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgb(255 252 245 / 98%), rgb(253 250 243 / 98%)),
    #fffdf7;
  box-shadow: 0 8px 18px rgb(34 34 34 / 4%);
}

.inline-character-name {
  margin-bottom: 0.32rem;
  color: #6c4b2c;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.inline-character-text {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.02rem;
  line-height: 1.72;
}

.inline-character-text > :first-child {
  margin-top: 0;
}

.inline-character-text > :last-child {
  margin-bottom: 0;
}

.dialogue-transcript-card {
  margin: 0;
  padding: 15px 16px 16px;
  border: 1px solid rgb(34 34 34 / 10%);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 252 245 / 98%), rgb(252 249 242 / 98%)),
    #fffdf8;
  box-shadow: 0 10px 24px rgb(34 34 34 / 5%);
}

.dialogue-transcript-label {
  margin: 0 0 0.6rem;
  color: #6c4b2c;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.dialogue-transcript-turns {
  display: grid;
  gap: 0.7rem;
}

.dialogue-transcript-turn {
  padding-top: 0.1rem;
}

.dialogue-transcript-speaker {
  margin-bottom: 0.18rem;
  color: #6c4b2c;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.dialogue-transcript-text {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1rem;
  line-height: 1.72;
}

.dialogue-transcript-text > :first-child {
  margin-top: 0;
}

.dialogue-transcript-text > :last-child {
  margin-bottom: 0;
}

.matching-pairs-card {
  margin: 0;
  padding: 15px 16px 16px;
  border: 1px solid rgb(31 111 139 / 16%);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 98%), rgb(247 250 252 / 98%)),
    #fff;
  box-shadow: 0 10px 26px rgb(31 111 139 / 8%);
}

.matching-pairs-label {
  margin: 0 0 0.45rem;
  color: #155e75;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.matching-pairs-prompt {
  margin-bottom: 0.9rem;
  color: var(--ink);
}

.matching-pairs-prompt > :first-child {
  margin-top: 0;
}

.matching-pairs-prompt > :last-child {
  margin-bottom: 0;
}

.matching-pairs-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.matching-pairs-column {
  min-width: 0;
}

.matching-pairs-column-title {
  margin: 0 0 0.4rem;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.matching-pairs-list {
  display: grid;
  gap: 0.55rem;
}

.matching-pairs-item {
  width: 100%;
  padding: 0.82rem 0.88rem;
  border: 1px solid rgb(31 111 139 / 13%);
  border-radius: 8px;
  background: #fff;
  color: #17212b;
  text-align: left;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  box-shadow: 0 6px 14px rgb(31 111 139 / 4%);
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.matching-pairs-item:hover,
.matching-pairs-item:focus {
  outline: 0;
  transform: translateY(-1px);
  border-color: rgb(31 111 139 / 28%);
  box-shadow: 0 10px 20px rgb(31 111 139 / 8%);
}

.matching-pairs-item.is-selected {
  border-color: #1f6f8b;
  background: rgb(31 111 139 / 7%);
  box-shadow: 0 10px 20px rgb(31 111 139 / 10%);
}

.matching-pairs-item.is-locked {
  border-color: rgb(21 128 61 / 22%);
  background: rgb(240 253 244 / 98%);
  color: #166534;
  box-shadow: none;
}

.matching-pairs-item.is-error {
  border-color: rgb(185 28 28 / 35%);
  background: rgb(254 242 242 / 98%);
  color: #991b1b;
  animation: matching-pairs-shake 320ms ease;
}

.matching-pairs-status {
  margin: 0.95rem 0 0;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.84rem;
  font-weight: 600;
}

.matching-pairs-status.is-success {
  color: #166534;
}

.fill-in-the-blank-card {
  margin: 0;
  padding: 15px 16px 16px;
  border: 1px solid rgb(31 111 139 / 16%);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 98%), rgb(248 250 252 / 98%)),
    #fff;
  box-shadow: 0 10px 28px rgb(31 111 139 / 8%);
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

.fill-in-the-blank-card.is-fill_in_the_blank_input {
  border-left: 4px solid #1f6f8b;
}

.fill-in-the-blank-card.is-fill_in_the_blank_choice {
  border-left: 4px solid #c66b3d;
}

.fill-in-the-blank-card.is-error {
  border-color: rgb(185 28 28 / 35%);
  box-shadow: 0 12px 24px rgb(185 28 28 / 8%);
}

.fill-in-the-blank-label {
  margin: 0 0 0.45rem;
  color: #155e75;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.fill-in-the-blank-card.is-fill_in_the_blank_choice .fill-in-the-blank-label {
  color: #9a3412;
}

.fill-in-the-blank-prompt {
  margin-bottom: 0.95rem;
  color: var(--ink);
}

.fill-in-the-blank-prompt > :first-child {
  margin-top: 0;
}

.fill-in-the-blank-prompt > :last-child {
  margin-bottom: 0;
}

.fill-in-the-blank-sentence {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.95rem;
  color: #17212b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(1.02rem, 0.98rem + 0.22vw, 1.18rem);
  line-height: 1.7;
}

.fill-in-the-blank-text {
  white-space: pre-wrap;
}

.fill-in-the-blank-blank-wrap {
  min-width: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.fill-in-the-blank-input,
.fill-in-the-blank-select {
  min-width: 72px;
  width: clamp(72px, 14ch, 160px);
  padding: 0.45rem 0.35rem;
  border: 0;
  border-bottom: 2px solid rgb(31 111 139 / 54%);
  border-radius: 0;
  background: transparent;
  color: #17212b;
  font: inherit;
  line-height: 1.45;
  box-shadow: none;
}

.fill-in-the-blank-input:focus {
  outline: 0;
  border-bottom-color: #155e75;
  box-shadow: 0 3px 0 rgb(21 94 117 / 16%);
}

.fill-in-the-blank-select {
  appearance: none;
  -webkit-appearance: none;
  min-height: 2.15rem;
  padding-right: 0.35rem;
  background: transparent;
  cursor: pointer;
}

.fill-in-the-blank-select:focus {
  outline: 0;
  border-bottom-color: #155e75;
  box-shadow: 0 3px 0 rgb(21 94 117 / 16%);
}

.fill-in-the-blank-controls {
  display: flex;
  justify-content: flex-end;
}

.exercise-confirm-button {
  width: 40px;
  height: 40px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgb(21 94 117 / 20%);
  border-radius: 999px;
  background: #fff;
  color: #155e75;
  font-family: var(--bs-body-font-family);
  box-shadow: 0 8px 18px rgb(21 94 117 / 7%);
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease,
    color 140ms ease,
    box-shadow 140ms ease;
}

.exercise-confirm-button:hover,
.exercise-confirm-button:focus {
  outline: 0;
  transform: translateY(-1px);
  border-color: rgb(21 94 117 / 36%);
  background: rgb(240 249 255 / 96%);
  box-shadow: 0 10px 22px rgb(21 94 117 / 10%);
}

.exercise-confirm-button:disabled {
  transform: none;
  border-color: rgb(148 163 184 / 28%);
  background: rgb(248 250 252 / 96%);
  color: #94a3b8;
  box-shadow: none;
  cursor: default;
}

.exercise-confirm-button.is-success {
  border-color: rgb(21 128 61 / 22%);
  background: rgb(240 253 244 / 98%);
  color: #166534;
}

.fill-in-the-blank-status {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.84rem;
  font-weight: 600;
}

.fill-in-the-blank-status.is-error {
  color: #991b1b;
}

.fill-in-the-blank-status.is-success {
  color: #166534;
}

.quiz-card {
  margin: 0;
  padding: 15px 16px 16px;
  border: 1px solid rgb(79 70 229 / 16%);
  border-left: 4px solid #4f46e5;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 98%), rgb(248 250 255 / 98%)),
    #fff;
  box-shadow: 0 10px 28px rgb(79 70 229 / 8%);
}

.quiz-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 0.9rem;
}

.quiz-header-text {
  min-width: 0;
}

.quiz-label {
  margin: 0 0 0.35rem;
  color: #4338ca;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.quiz-prompt,
.quiz-item-prompt,
.quiz-item-helper {
  color: var(--ink);
}

.quiz-prompt > :first-child,
.quiz-item-prompt > :first-child {
  margin-top: 0;
}

.quiz-prompt > :last-child,
.quiz-item-prompt > :last-child {
  margin-bottom: 0;
}

.quiz-close-button {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgb(148 163 184 / 26%);
  border-radius: 999px;
  background: rgb(255 255 255 / 95%);
  color: #64748b;
  font-size: 1.6rem;
  line-height: 1;
}

.quiz-close-button:hover,
.quiz-close-button:focus {
  outline: 0;
  border-color: rgb(79 70 229 / 32%);
  background: rgb(238 242 255 / 98%);
  color: #4338ca;
}

.quiz-close-button:disabled {
  opacity: 0.55;
  cursor: default;
}

.quiz-item-counter {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
}

.quiz-item-prompt {
  margin-bottom: 0.9rem;
  font-weight: 700;
}

.quiz-item-body {
  display: grid;
  gap: 0.9rem;
}

.quiz-item-sentence {
  margin: 0;
  color: #17212b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(1.05rem, 1rem + 0.2vw, 1.18rem);
  font-style: italic;
  line-height: 1.72;
  white-space: pre-wrap;
}

.quiz-open-textarea {
  min-height: 118px;
  resize: vertical;
}

.quiz-fill-sentence {
  margin-bottom: 0;
}

.quiz-nav,
.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.quiz-nav {
  margin-top: 1rem;
}

.quiz-nav-button,
.quiz-evaluate-button,
.quiz-pair-remove {
  border: 1px solid rgb(79 70 229 / 16%);
  border-radius: 999px;
  background: #fff;
  color: #312e81;
  font-family: var(--bs-body-font-family);
  font-size: 1rem;
  font-weight: 600;
}

.quiz-nav-button,
.quiz-pair-remove {
  padding: 0.55rem 0.9rem;
}

.quiz-nav-button:hover,
.quiz-nav-button:focus,
.quiz-evaluate-button:hover,
.quiz-evaluate-button:focus,
.quiz-pair-remove:hover,
.quiz-pair-remove:focus {
  outline: 0;
  border-color: rgb(79 70 229 / 32%);
  background: rgb(238 242 255 / 98%);
}

.quiz-nav-button:disabled,
.quiz-evaluate-button:disabled,
.quiz-pair-remove:disabled {
  border-color: rgb(148 163 184 / 28%);
  background: rgb(248 250 252 / 96%);
  color: #94a3b8;
  cursor: default;
}

.quiz-footer {
  margin-top: 1rem;
}

.quiz-status {
  margin: 0;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.84rem;
  font-weight: 600;
}

.quiz-status.is-success {
  color: #166534;
}

.quiz-status.is-error {
  color: #991b1b;
}

.quiz-evaluate-button {
  padding: 0.65rem 1.1rem;
  background: #312e81;
  color: #fff;
  border-color: #312e81;
}

.quiz-evaluate-button:hover,
.quiz-evaluate-button:focus {
  background: #4338ca;
  color: #fff;
}

.quiz-pair-list {
  display: grid;
  gap: 0.55rem;
}

.quiz-pair-row {
  min-width: 0;
}

.quiz-pair-row-text {
  min-width: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.quiz-pair-remove {
  flex: 0 0 auto;
}

.multiple-choice-card,
.unscramble-sentence-card {
  margin: 0;
  padding: 15px 16px 16px;
  border: 1px solid rgb(31 111 139 / 16%);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 98%), rgb(248 250 252 / 98%)),
    #fff;
  box-shadow: 0 10px 28px rgb(31 111 139 / 8%);
}

.multiple-choice-card {
  border-left: 4px solid #2f6fed;
}

.unscramble-sentence-card {
  border-left: 4px solid #0f766e;
}

.multiple-choice-card.is-error,
.unscramble-sentence-card.is-error {
  border-color: rgb(185 28 28 / 35%);
  box-shadow: 0 12px 24px rgb(185 28 28 / 8%);
}

.multiple-choice-label,
.unscramble-sentence-label {
  margin: 0 0 0.45rem;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.multiple-choice-label {
  color: #1d4ed8;
}

.unscramble-sentence-label {
  color: #0f766e;
}

.multiple-choice-prompt,
.unscramble-sentence-prompt,
.multiple-choice-question {
  color: var(--ink);
}

.multiple-choice-prompt,
.unscramble-sentence-prompt {
  margin-bottom: 0.85rem;
}

.multiple-choice-question {
  margin-bottom: 0.95rem;
  font-weight: 700;
}

.multiple-choice-options {
  display: grid;
  gap: 0.6rem;
}

.multiple-choice-option,
.unscramble-token {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 0.88rem;
  border: 1px solid rgb(31 111 139 / 13%);
  border-radius: 10px;
  background: #fff;
  color: #17212b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  box-shadow: 0 6px 14px rgb(31 111 139 / 4%);
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.multiple-choice-option {
  width: 100%;
  text-align: left;
  justify-content: flex-start;
}

.multiple-choice-option:hover,
.multiple-choice-option:focus,
.unscramble-token:hover,
.unscramble-token:focus {
  outline: 0;
  transform: translateY(-1px);
  border-color: rgb(31 111 139 / 28%);
  box-shadow: 0 10px 20px rgb(31 111 139 / 8%);
}

.multiple-choice-option.is-selected,
.unscramble-token.is-selected {
  border-color: #1f6f8b;
  background: rgb(31 111 139 / 7%);
  box-shadow: 0 10px 20px rgb(31 111 139 / 10%);
}

.unscramble-sentence-assembled,
.unscramble-sentence-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  min-height: 52px;
  padding: 0.8rem;
  border: 1px dashed rgb(31 111 139 / 20%);
  border-radius: 10px;
  background: rgb(255 255 255 / 92%);
}

.unscramble-sentence-assembled {
  margin-bottom: 0.7rem;
}

.unscramble-sentence-bank {
  margin-bottom: 0.95rem;
}

.unscramble-placeholder {
  color: #6b7280;
  font-style: italic;
}

.exercise-controls {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.85rem;
}

.exercise-status {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.84rem;
  font-weight: 600;
}

.exercise-status.is-error {
  color: #991b1b;
}

.exercise-status.is-success {
  color: #166534;
}

@keyframes matching-pairs-shake {
  0%,
  100% {
    transform: translateX(0);
  }

  20% {
    transform: translateX(-2px);
  }

  40% {
    transform: translateX(2px);
  }

  60% {
    transform: translateX(-1px);
  }

  80% {
    transform: translateX(1px);
  }
}

@media (max-width: 720px) {
  .matching-pairs-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .quiz-header,
  .quiz-footer,
  .quiz-nav,
  .quiz-pair-row {
    align-items: stretch;
    flex-direction: column;
  }

  .quiz-evaluate-button,
  .quiz-nav-button,
  .quiz-pair-remove {
    width: 100%;
  }

  .fill-in-the-blank-input,
  .fill-in-the-blank-select {
    min-width: 72px;
    width: min(140px, 38vw);
  }
}

.translation-prompt-card {
  margin: 0;
  padding: 14px 16px 15px;
  border: 1px solid rgb(31 111 139 / 16%);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 98%), rgb(248 250 252 / 98%)),
    #fff;
  box-shadow: 0 10px 28px rgb(31 111 139 / 8%);
}

.translation-prompt-card.is-translate_to_english_prompt {
  border-left: 4px solid #1f6f8b;
}

.translation-prompt-card.is-understand_in_spanish_prompt {
  border-left: 4px solid #c66b3d;
}

.translation-prompt-label {
  margin: 0 0 0.45rem;
  color: #155e75;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.translation-prompt-card.is-understand_in_spanish_prompt .translation-prompt-label {
  color: #9a3412;
}

.translation-prompt-sentence {
  margin: 0;
  color: #17212b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(1.08rem, 1rem + 0.2vw, 1.24rem);
  font-style: italic;
  line-height: 1.75;
  white-space: pre-wrap;
}

.message-row.is-user {
  justify-content: flex-start;
}

.message-bubble {
  max-width: min(100%, 760px);
  padding: 0;
  border-radius: 0;
  line-height: 1.45;
  overflow-wrap: anywhere;
  font-size: 1rem;
  text-align: left;
}

.message-row.is-model .message-bubble {
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.12rem;
  line-height: 1.55;
}

.tutor-message-stack {
  display: grid;
  gap: 0.9rem;
}

.message-row.is-model.tutor-message-enter .message-bubble {
  animation: tutor-message-bubble-in 300ms cubic-bezier(0.22, 1, 0.36, 1) both;
  transform-origin: left top;
}

.message-row.is-model.tutor-message-enter .message-bubble > :not(.sentence-evaluation) {
  animation: tutor-message-fade-in 420ms ease-out both;
}

.message-row.is-model.tutor-message-enter .message-bubble > :not(.sentence-evaluation):nth-child(2) {
  animation-delay: 80ms;
}

.message-row.is-model.tutor-message-enter .message-bubble > :not(.sentence-evaluation):nth-child(3) {
  animation-delay: 150ms;
}

.message-row.is-model.tutor-message-enter .message-bubble > :not(.sentence-evaluation):nth-child(4) {
  animation-delay: 220ms;
}

.message-row.is-model.tutor-message-enter .sentence-evaluation {
  animation: tutor-message-fade-in 440ms ease-out 300ms both;
}

@keyframes tutor-message-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tutor-message-bubble-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .message-row.is-model.tutor-message-enter .message-bubble,
  .message-row.is-model.tutor-message-enter .message-bubble > :not(.sentence-evaluation),
  .message-row.is-model.tutor-message-enter .sentence-evaluation {
    animation: none;
  }
}

@media print {
  .message-actions,
  .sentence-evaluation {
    display: none !important;
  }
}

.message-row.is-user .message-bubble {
  --bs-card-border-color: rgb(31 111 139 / 18%);
  --bs-card-bg: rgb(31 111 139 / 4%);
  --bs-card-border-radius: 8px;
  width: fit-content;
  max-width: min(100%, 760px);
  padding: 0.82rem 1rem;
  background: var(--bs-card-bg);
  color: #1f6f8b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.12rem;
  line-height: 1.55;
  box-shadow: 0 8px 22px rgb(31 111 139 / 7%);
}

.message-actions {
  display: inline-flex;
  gap: 4px;
  margin-left: 8px;
  vertical-align: -2px;
}

.message-action-button {
  width: 24px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: rgb(31 111 139 / 62%);
}

.message-action-button:hover,
.message-action-button:focus {
  outline: 0;
  background: rgb(31 111 139 / 8%);
  color: #1f6f8b;
}

.message-action-button.is-copied {
  background: var(--accent-soft);
  color: var(--accent);
}

.tutor-message-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.tutor-message-action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.42rem 0.8rem;
  border: 1px solid rgb(31 111 139 / 16%);
  border-radius: 999px;
  background: rgb(31 111 139 / 6%);
  color: #1f6f8b;
  font-size: 0.92rem;
  font-family: var(--bs-body-font-family);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.tutor-message-action-link:hover,
.tutor-message-action-link:focus {
  background: rgb(31 111 139 / 10%);
  border-color: rgb(31 111 139 / 22%);
  color: #15586f;
  transform: translateY(-1px);
  text-decoration: none;
}

.sentence-evaluation {
  --bs-card-border-color: rgb(31 111 139 / 14%);
  --bs-card-border-radius: 8px;
  max-width: min(100%, 760px);
  margin-top: 16px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 94%), rgb(248 250 252 / 96%)),
    #fff;
  color: var(--ink);
  box-shadow: 0 10px 28px rgb(31 111 139 / 8%);
}

.sentence-evaluation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: rgb(31 111 139 / 4%);
}

.sentence-evaluation-label {
  margin: 0;
  color: #155e75;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
}

.sentence-evaluation-body {
  padding: 14px 14px 13px;
}

.sentence-evaluation-parts-label {
  margin: 0 0 0.28rem;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.sentence-evaluation-parts-label {
  margin-bottom: 0.35rem;
}

.sentence-parts {
  margin: 0;
  color: #17212b;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(1.05rem, 1rem + 0.18vw, 1.22rem);
  line-height: 1.85;
}

.sentence-part {
  display: inline;
  padding: 0.08em 0.12em 0.12em;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: 0;
}

button.sentence-part {
  cursor: pointer;
  text-decoration-line: underline;
  text-decoration-thickness: 0.11em;
  text-underline-offset: 0.2em;
  text-decoration-skip-ink: none;
}

button.sentence-part:hover,
button.sentence-part:focus {
  outline: 0;
  filter: saturate(1.1);
}

.sentence-part.is-improve {
  background: rgb(255 193 7 / 18%);
  text-decoration-color: #c98a00;
}

.sentence-part.is-improve:hover,
.sentence-part.is-improve:focus {
  background: rgb(255 193 7 / 28%);
  box-shadow: 0 0 0 3px rgb(255 193 7 / 14%);
}

.sentence-part.is-error {
  background: rgb(220 53 69 / 10%);
  text-decoration-color: #dc3545;
}

.sentence-part.is-error:hover,
.sentence-part.is-error:focus {
  background: rgb(220 53 69 / 17%);
  box-shadow: 0 0 0 3px rgb(220 53 69 / 10%);
}

.sentence-popover {
  max-width: min(320px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgb(34 34 34 / 14%);
}

.sentence-popover .popover-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 800;
}

.sentence-popover .popover-body {
  color: #3f4d5a;
  font-size: 0.92rem;
  line-height: 1.45;
}

.sentence-popover-error .popover-header {
  color: #b02a37;
}

.sentence-popover-improve .popover-header {
  color: #9a6a00;
}

.message-row.is-error .message-bubble {
  max-width: min(100%, 760px);
  margin-bottom: 0;
  border-radius: 8px;
  color: #9d3b24;
}

.message-bubble :where(p, ul, ol, blockquote, pre, table) {
  margin-bottom: 0.75rem;
}

.message-bubble :where(:first-child) {
  margin-top: 0;
}

.message-bubble :where(:last-child) {
  margin-bottom: 0;
}

.message-bubble :where(ul, ol) {
  padding-left: 1.25rem;
}

.message-bubble :where(li + li) {
  margin-top: 0.2rem;
}

.message-bubble :where(a) {
  font-weight: 700;
  text-underline-offset: 0.18em;
}

.message-row.is-model .message-bubble :where(a),
.message-row.is-error .message-bubble :where(a) {
  color: #c6524e;
}

.message-row.is-user .message-bubble :where(a) {
  color: #155e75;
}

.message-bubble :where(code) {
  padding: 0.12rem 0.28rem;
  border-radius: 5px;
  background: rgb(15 23 42 / 8%);
  color: #152234;
  font-size: 0.92em;
}

.message-row.is-user .message-bubble :where(code) {
  background: rgb(15 23 42 / 8%);
  color: #152234;
}

.message-bubble :where(pre) {
  max-width: 100%;
  overflow-x: auto;
  padding: 0.8rem;
  border: 1px solid rgb(15 23 42 / 10%);
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
  white-space: pre;
}

.message-bubble :where(pre code) {
  padding: 0;
  background: transparent;
  color: inherit;
}

.message-bubble :where(blockquote) {
  padding: 0.15rem 0 0.15rem 0.8rem;
  border-left: 3px solid var(--accent);
  color: #475569;
}

.message-row.is-user .message-bubble :where(blockquote) {
  border-left-color: #1f6f8b;
  color: #155e75;
}

.message-bubble :where(table) {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.message-bubble :where(th, td) {
  padding: 0.35rem 0.5rem;
  border: 1px solid rgb(100 116 139 / 32%);
}

.message-bubble :where(strong) {
  font-weight: 800;
}

.typing-caret::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 1.1em;
  margin-left: 3px;
  transform: translateY(2px);
  background: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.composer {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "prompt input"
    ". footer";
  gap: 10px 14px;
  align-items: start;
  padding: 14px 46px 22px;
  border-top: 0;
  background: #fff;
}

.composer-prompt {
  grid-area: prompt;
  min-height: 44px;
  display: inline-flex;
  align-items: flex-start;
  color: var(--accent);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.4;
  padding-top: 9px;
  user-select: none;
}

.composer-input-wrap {
  grid-area: input;
  position: relative;
  min-height: 44px;
  border-bottom: 1px solid #ced4da;
}

.composer-input {
  min-height: 44px;
  max-height: 150px;
  width: 100%;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  caret-color: var(--accent);
  font: inherit;
  line-height: 1.4;
  padding: 9px 0 6px;
}

.composer-input::placeholder {
  color: #aaa;
  opacity: 1;
}

.composer-input:focus {
  box-shadow: none;
}

.composer:focus-within .composer-input-wrap {
  border-bottom-color: var(--accent);
}

.composer-footer {
  grid-area: footer;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  min-height: 42px;
}

.composer-status {
  min-height: 1.1rem;
  margin-top: 0.2rem;
  padding-left: 1.1rem;
}

.llm-context-meter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  user-select: none;
}

.llm-context-meter-copy,
.llm-context-meter-label,
.llm-context-meter-value {
  display: none !important;
}

.llm-context-meter-ring {
  width: 34px;
  height: 34px;
  overflow: visible;
  transform: rotate(-90deg);
  flex: 0 0 auto;
}

.llm-context-meter-track,
.llm-context-meter-progress {
  fill: none;
  stroke-width: 3;
}

.llm-context-meter-track {
  stroke: color-mix(in srgb, var(--line) 78%, white 22%);
}

.llm-context-meter-progress {
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke-dashoffset 180ms ease, stroke 180ms ease;
}

.llm-context-meter[data-context-level='warn'] .llm-context-meter-progress {
  stroke: #ca7b18;
}

.llm-context-meter[data-context-level='danger'] .llm-context-meter-progress {
  stroke: #c34c47;
}

.send-button {
  justify-self: end;
  color: var(--accent);
  background: transparent;
  border-color: transparent;
}

.send-button[data-mode='stop'] {
  color: #b64a46;
}

.send-button:hover,
.send-button:focus {
  color: #d95e5a;
  background: var(--accent-soft);
  border-color: transparent;
}

.send-button:disabled,
.composer-input:disabled {
  cursor: not-allowed;
}

.auth-sheet {
  --bs-card-border-color: var(--line);
  --bs-card-border-radius: 8px;
  width: min(100%, 480px);
  box-shadow: 0 16px 45px rgb(34 34 34 / 8%);
}

.auth-form {
  display: grid;
  gap: 20px;
}

.auth-copy {
  display: grid;
  gap: 4px;
}

.auth-kicker {
  margin: 0;
  color: var(--accent);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1rem;
}

.auth-copy h1 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: clamp(2rem, 6vw, 3rem);
  letter-spacing: 0;
}

.auth-error {
  margin: 0;
}

.google-auth-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 8px;
  font-weight: 700;
}

.google-auth-button:hover,
.google-auth-button:focus {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.auth-divider {
  height: 1px;
  background: var(--line);
}

.auth-field {
  color: var(--ink);
}

.auth-field .form-label {
  margin-bottom: 7px;
  color: #555;
  font-size: 0.95rem;
}

.auth-field .form-control {
  min-height: 44px;
  border: 0;
  border-bottom: 1px solid #ced4da;
  background: transparent;
  color: var(--ink);
  border-radius: 0;
}

.auth-field .form-control:focus {
  border-bottom-color: var(--accent);
  box-shadow: none;
}

.auth-field .form-control.is-invalid {
  border-bottom-color: var(--bs-form-invalid-border-color);
}

.auth-submit {
  min-height: 44px;
  border-radius: 8px;
}

.auth-switch {
  margin: 0;
  color: var(--muted);
}

.auth-switch a {
  color: #c6524e;
  font-weight: 700;
  text-underline-offset: 0.18em;
}

@media (max-width: 720px) {
  .app-shell {
    padding: 0;
  }

  .chat-workspace {
    width: 100%;
    height: 100vh;
    min-height: 100vh;
  }

  .chat-workspace.has-toolbar {
    gap: 0;
  }

  .chat-toolbar {
    min-height: 48px;
    padding: 6px 12px;
    border-bottom: 1px solid var(--line);
    background: #fff;
  }

  .chat-layout {
    width: 100%;
    height: 100%;
    min-height: 0;
    border: 0;
    border-radius: 0;
  }

  .practice-modules-view {
    border: 0;
    border-radius: 0;
    box-shadow: none;
    padding: 22px 18px 26px;
  }

  .practice-modules-header,
  .practice-module-form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .practice-modules-header-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .practice-modules-header-has-close .practice-modules-header-actions {
    width: auto;
    flex-direction: row;
    align-items: flex-start;
  }

  .practice-modules-header:not(.practice-modules-header-has-close) .practice-modules-header-actions {
    width: auto;
    align-items: flex-start;
  }

  .practice-module-filter-input-wrap {
    max-width: none;
    flex-wrap: wrap;
  }

  .practice-module-form-card {
    padding: 20px 18px;
  }

  .messages {
    padding: 28px 18px 18px;
  }

  .message-bubble {
    max-width: 100%;
    font-size: 0.98rem;
  }

  .sentence-evaluation-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .composer {
    padding: 12px 18px 16px;
  }

  .composer-footer {
    gap: 12px;
  }

  .auth-sheet {
    width: 100%;
    min-height: 100vh;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .auth-sheet .card-body {
    padding: 36px 24px;
  }
}