@import url('./lesson-dialogue-navigation.css?v=th162wDesgQsmhjGm2TAgc1XVjcqEyJ6a1fr9XigP6I');

.lesson-dialogue-shell {
  width: calc(100% - 0.5rem);
  margin: 0.25rem auto;
}
.lesson-dialogue {
  color: var(--reader-text);
  font-family: var(--site-font-body);
  font-size: var(--font-size-body);
  font-weight: 400;
  line-height: var(--line-height-body);
}
.lesson-dialogue__navigation {
  display: flex; align-items: center; margin-left: auto;
}
.lesson-dialogue a { color: var(--reader-link); text-decoration: none; }
.lesson-dialogue a:hover { text-decoration: underline; }
.lesson-dialogue__workspace {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(22rem, 34%); grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas: "header header" "thread plan" "footer plan";
  height: calc(100dvh - var(--lesson-fixed-topbar-height, 56px) - 0.5rem);
  min-height: 0;
  border: 1px solid var(--border-default); border-radius: var(--radius-lg, 12px);
  background: var(--surface-1);
}
.lesson-dialogue__header {
  grid-area: header;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.5rem 1rem; border-bottom: 1px solid var(--border-muted);
}
.lesson-dialogue__heading { min-width: 0; }
.lesson-dialogue__scroll-bottom {
  grid-area: thread; align-self: end; justify-self: center; position: relative; z-index: 5;
  display: grid; place-items: center; width: 2.75rem; height: 2.75rem; margin-bottom: 0.75rem; padding: 0;
  border: 1px solid var(--border-strong); border-radius: 50%;
  background: var(--surface-1); color: var(--text-primary); box-shadow: var(--shadow-popover); cursor: pointer;
}
.lesson-dialogue__scroll-bottom[hidden] { display: none; }
.lesson-dialogue__scroll-bottom svg { width: 1.25rem; height: 1.25rem; }
.lesson-dialogue__scroll-bottom:hover { background: var(--surface-hover); }
.lesson-dialogue__scroll-bottom:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.lesson-dialogue__context { display: flex; align-items: baseline; flex-wrap: wrap; column-gap: 0.75rem; }
.lesson-dialogue__course { min-width: 0; font-size: var(--font-size-caption); overflow-wrap: anywhere; }
.lesson-dialogue__header h1 {
  margin: 0; color: var(--text-heading); overflow-wrap: anywhere;
  font-family: var(--site-font-display); font-size: var(--font-size-body-lg);
  font-weight: 600; line-height: var(--line-height-heading);
}
.lesson-dialogue__header p { margin: 0; color: var(--text-secondary); font-size: var(--font-size-caption); overflow-wrap: anywhere; }
.lesson-dialogue__header-actions { display: grid; justify-items: end; gap: 0.5rem; flex-shrink: 0; }
.lesson-dialogue__tools { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem 1rem; }
.lesson-dialogue__text-size { display: flex; align-items: center; border: 1px solid var(--border-default); border-radius: var(--radius-sm, 6px); overflow: hidden; }
.lesson-dialogue__font-setting { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; padding-bottom: 0.75rem; margin-bottom: 0.75rem; border-bottom: 1px solid var(--border-muted); }
.lesson-dialogue__font-setting > span { color: var(--text-secondary); }
.lesson-dialogue__font-setting .lesson-dialogue__text-size { flex-shrink: 0; }
.lesson-dialogue__text-size button { min-width: 2rem; min-height: 2.25rem; padding: 0.25rem; border: 0; background: var(--surface-1); color: var(--text-primary); font: inherit; font-size: var(--font-size-caption); cursor: pointer; }
.lesson-dialogue__text-size button:hover { background: var(--surface-hover); }
.lesson-dialogue__text-size button:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }
.lesson-dialogue__text-size button:disabled { opacity: 0.4; cursor: default; }
.lesson-dialogue__message-meta { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.25rem; }
.lesson-dialogue__message-meta .lesson-mentor__name { margin-bottom: 0; }
.lesson-dialogue__listen {
  display: grid; place-items: center; width: 2rem; height: 2rem; padding: 0;
  border: 0; border-radius: var(--radius-sm, 6px); background: transparent;
  color: var(--text-secondary); font: inherit; font-size: var(--font-size-body); cursor: pointer;
}
.lesson-dialogue__listen:hover { color: var(--text-primary); background: var(--surface-hover); }
.lesson-dialogue__listen[aria-pressed="true"] { color: var(--reader-link); }
.lesson-dialogue__live { display: flex; align-items: center; gap: 0.75rem; padding: 0.5rem 0.375rem 1rem; }
.lesson-dialogue__live[hidden] { display: none; }
.lesson-dialogue__orb {
  display: grid; place-items: center; flex: 0 0 4rem; width: 4rem; height: 4rem; border-radius: 50%;
  color: var(--surface-1); background: radial-gradient(circle at 30% 25%, color-mix(in srgb, var(--reader-link) 70%, var(--surface-1)), var(--reader-link));
  font-size: var(--font-size-title-lg); box-shadow: 0 0 0 0.375rem var(--surface-2);
}
.lesson-dialogue__live[data-voice-state="speaking"] .lesson-dialogue__orb { animation: lesson-voice-pulse 900ms ease-in-out infinite alternate; }
.lesson-dialogue__live[data-voice-state="thinking"] .lesson-dialogue__orb,
.lesson-dialogue__live[data-voice-state="connecting"] .lesson-dialogue__orb { animation: lesson-voice-pulse 1600ms ease-in-out infinite alternate; }
.lesson-dialogue__live-copy { flex: 1; min-width: 0; }
.lesson-dialogue__live-copy p { margin: 0; font-size: var(--font-size-body-sm); color: var(--text-primary); }
.lesson-dialogue__live-copy .lesson-dialogue__live-transcript { color: var(--text-secondary); max-height: 3rem; overflow-y: auto; overflow-wrap: anywhere; }
.lesson-dialogue__live-button { background: var(--text-primary); color: var(--surface-1); }
.lesson-dialogue__live-button { display: grid; place-items: center; padding: 0; }
.lesson-dialogue__live-button[hidden] { display: none; }
.lesson-dialogue__voice-icon { display: block; width: 1.375rem; height: 1.375rem; }
.lesson-dialogue__live-button[aria-pressed="true"] { background: var(--text-primary); outline: 2px solid var(--border-strong); outline-offset: 2px; }
.lesson-dialogue__microphone-settings { position: relative; }
.lesson-dialogue__microphone-settings > button { width: 2.25rem; height: 2.25rem; border: 1px solid var(--border-default); border-radius: var(--radius-sm, 6px); }
.lesson-dialogue__microphone-settings > .lesson-mentor__microphone-settings { position: absolute; top: calc(100% + 0.5rem); right: 0; z-index: 30; width: min(22rem, calc(100vw - 2rem)); box-shadow: var(--shadow-popover); }
@keyframes lesson-voice-pulse { to { transform: scale(0.93); opacity: 0.8; } }
@media (prefers-reduced-motion: reduce) {
  .lesson-dialogue__switch-track::before { transition: none; }
  .lesson-dialogue__orb { animation: none; }
}
.lesson-dialogue__menu { position: relative; }
.lesson-dialogue__menu summary {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.375rem 0.625rem;
  border: 1px solid var(--border-default); border-radius: var(--radius-sm, 6px);
  background: var(--surface-1); color: var(--text-primary); cursor: pointer;
  font-size: var(--font-size-body-sm); list-style: none;
}
.lesson-dialogue__menu summary::-webkit-details-marker { display: none; }
.lesson-dialogue__menu summary:hover { background: var(--surface-hover); }
.lesson-dialogue__menu > ol {
  position: absolute; right: 0; top: calc(100% + 0.5rem); z-index: 10;
  min-width: 18rem; max-width: min(24rem, calc(100vw - 2rem));
  max-height: 60dvh; overflow-y: auto; margin: 0; padding: 0.625rem 0.625rem 0.625rem 2.5rem;
  background: var(--surface-1); border: 1px solid var(--border-default);
  border-radius: var(--radius-sm, 6px); box-shadow: var(--shadow-popover);
}
.lesson-dialogue__menu li { padding: 0.5rem 0.25rem; font-size: var(--font-size-body-sm); }
.lesson-dialogue__menu li.is-current { color: var(--reader-link); font-weight: 600; }
.lesson-dialogue__course-list a[aria-current="page"] { font-weight: 600; }
.lesson-dialogue__edit { display: block; margin-top: 0.5rem; font-size: var(--font-size-body-sm); }
/* Scroll each pane without moving the lesson heading or composer. */
.lesson-dialogue__thread { grid-area: thread; min-width: 0; position: relative; padding: 1.5rem 1.75rem; min-height: 0; overflow-y: auto; }
.lesson-dialogue__thread, .lesson-dialogue__sidebar {
  overscroll-behavior: contain; scrollbar-gutter: stable;
  scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent;
}
.lesson-dialogue__thread:hover, .lesson-dialogue__thread:focus-within,
.lesson-dialogue__sidebar:hover, .lesson-dialogue__sidebar:focus-within { scrollbar-color: var(--text-tertiary) transparent; }
.lesson-dialogue__thread::-webkit-scrollbar, .lesson-dialogue__sidebar::-webkit-scrollbar { width: 6px; }
.lesson-dialogue__thread::-webkit-scrollbar-thumb, .lesson-dialogue__sidebar::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--radius-pill, 999px); }
.lesson-dialogue__thread:focus-visible, .lesson-dialogue__sidebar:focus-visible { outline: 2px solid var(--focus); outline-offset: -3px; }
.lesson-dialogue__step:not(:has(.lesson-mentor__message)) { display: none; }
.lesson-dialogue__step:has(.lesson-mentor__message) ~ .lesson-dialogue__step:has(.lesson-mentor__message) { margin-top: 1.5rem; }
.lesson-dialogue__footer { grid-area: footer; min-width: 0; padding: 0.75rem 1.25rem; border-top: 1px solid var(--border-muted); position: relative; z-index: 5; background: var(--surface-1); border-radius: 0 0 var(--radius-lg, 12px) var(--radius-lg, 12px); }
.lesson-dialogue__status { margin: 0 0 0.5rem; color: var(--text-secondary); font-size: var(--font-size-body-sm); }
.lesson-dialogue__retry {
  padding: 0.5rem 0.75rem; margin-bottom: 0.5rem; background: var(--surface-2);
  border: 1px solid var(--border-default); border-radius: var(--radius-sm, 6px); color: var(--text-primary); font: inherit;
}
.lesson-dialogue__next { display: block; width: fit-content; margin: 0.5rem 0 0 auto; font-size: var(--font-size-body-sm); }
.lesson-dialogue :is(a, button, summary):focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.lesson-dialogue [hidden] { display: none; }
@media (max-width: 960px) {
  .lesson-dialogue__workspace { grid-template-columns: minmax(0, 1fr) minmax(18rem, 40%); }
  .lesson-dialogue__thread { padding: 1rem; }
  .lesson-dialogue__footer { padding: 0.75rem; }
}
@media (max-width: 760px) {
  .lesson-dialogue__microphone-settings > .lesson-mentor__microphone-settings { position: fixed; top: 9rem; left: 1rem; right: 1rem; width: auto; max-height: calc(100dvh - 10rem); overflow-y: auto; }
  .lesson-dialogue__workspace {
    grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto minmax(10rem, 1fr) auto;
    grid-template-areas: "header" "plan" "thread" "footer"; height: auto; min-height: calc(100dvh - var(--lesson-fixed-topbar-height, 56px) - 0.5rem);
  }
  .lesson-dialogue__header { align-items: stretch; flex-direction: column; gap: 0.25rem; padding: 0.5rem 0.75rem; }
  .lesson-dialogue__header-actions, .lesson-dialogue__tools { width: 100%; }
  .lesson-dialogue__menu summary, .lesson-dialogue__voice-toggle { min-height: 2.5rem; }
  .lesson-dialogue__thread { max-height: 60dvh; }
}
@media (max-width: 480px) {
  .lesson-dialogue__workspace { min-height: 24rem; }
  .lesson-dialogue__tools { gap: 0.5rem; }
  .lesson-dialogue__menu > ol { min-width: min(18rem, calc(100vw - 2rem)); }
}

.lesson-dialogue__footer .lesson-mentor__composer { margin-top: 0; padding: 0.625rem; border-radius: var(--radius-lg, 12px); font-size: var(--font-size-body); }
.lesson-dialogue__footer .lesson-mentor__input-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 0.375rem; }
.lesson-dialogue__footer .lesson-mentor__input-row textarea { grid-column: 1 / -1; grid-row: 1; width: 100%; padding: 0.375rem 0.5rem; }
.lesson-dialogue__footer .lesson-mentor__tools { grid-column: 1; grid-row: 2; }
.lesson-dialogue__footer .lesson-mentor__microphone { grid-column: 2; grid-row: 2; justify-self: end; margin: 0; }
.lesson-dialogue__footer .lesson-mentor__microphone > .lesson-mentor__control { width: 2.5rem; height: 2.5rem; flex-basis: 2.5rem; color: var(--text-primary); }
.lesson-dialogue__footer .lesson-mentor__microphone .bi-mic { font-size: var(--font-size-body-lg); }
.lesson-dialogue__footer .lesson-mentor__send, .lesson-dialogue__footer .lesson-dialogue__live-button { grid-column: 3; grid-row: 2; width: 2.5rem; height: 2.5rem; border: 1px solid var(--text-primary); }
.lesson-dialogue__footer .lesson-mentor__send i, .lesson-dialogue__footer .lesson-dialogue__live-button i { font-size: var(--font-size-body-lg); }
.lesson-mentor__composer--media { display: block; }
.lesson-mentor__input-row { display: flex; align-items: flex-end; gap: 0.25rem; }
.lesson-mentor__tools { position: relative; flex: 0 0 auto; }
.lesson-mentor__tools-menu { position: absolute; bottom: calc(100% + 0.5rem); left: 0; z-index: 20; min-width: 14rem; }
.lesson-mentor__draft-files { display: flex; gap: 0.5rem; overflow-x: auto; padding: 0.25rem 0.375rem 0.5rem; }
.lesson-mentor__draft-file {
  display: flex; align-items: center; gap: 0.5rem; min-width: 0; flex: 0 0 auto; max-width: 15rem;
  border: 1px solid var(--border-default); border-radius: var(--radius-sm, 6px); padding: 0.375rem; font-size: var(--font-size-body-sm);
}
.lesson-mentor__draft-file > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lesson-mentor__draft-file img { width: 2.5rem; height: 2.5rem; object-fit: cover; border-radius: var(--radius-sm, 6px); }
.lesson-mentor__draft-file button, .lesson-mentor__image-mode button {
  flex: 0 0 auto; border: 0; border-radius: var(--radius-sm, 6px); background: transparent; color: var(--text-secondary);
  font: inherit; cursor: pointer; padding: 0.25rem;
}
.lesson-mentor__image-mode { display: flex; align-items: center; gap: 0.5rem; padding: 0.25rem 0.375rem; color: var(--reader-link); font-size: var(--font-size-body-sm); }
.lesson-mentor__attachments { display: grid; gap: 0.5rem; margin-top: 0.5rem; }
.lesson-mentor__attachments img { display: block; width: min(100%, 28rem); height: auto; max-height: 28rem; object-fit: contain; border-radius: var(--radius-lg, 12px); }
@media (max-width: 480px) {
  .lesson-mentor__input-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; }
  .lesson-mentor__input-row textarea { grid-column: 1 / -1; grid-row: 1; width: 100%; }
  .lesson-mentor__input-row .lesson-mentor__tools { grid-column: 1; grid-row: 2; }
  .lesson-mentor__input-row .lesson-mentor__microphone { grid-column: 2; grid-row: 2; justify-self: end; }
  .lesson-mentor__input-row .lesson-mentor__send { grid-column: 3; grid-row: 2; width: 2.75rem; }
  .lesson-mentor__input-row .lesson-dialogue__live-button { grid-column: 4; grid-row: 2; }
}