/* Optional Learn support tools. This layer never changes lesson layout or state. */
.ls-learn-assist-grid[hidden],
.ls-learn-assist-layer[hidden] {
  display: none !important;
}

.ls-learn-assist-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1rem 0 0;
}

.ls-learn-assist-card {
  position: relative;
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  gap: 0.8rem;
  min-height: 7.15rem;
  padding: 0.95rem 0.95rem 1.4rem;
  border: 1px solid #dfe7e9;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(23, 40, 54, 0.04);
  color: #172033;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.ls-learn-assist-card:hover {
  transform: translateY(-2px);
  border-color: rgba(16, 151, 135, 0.42);
  box-shadow: 0 12px 26px rgba(23, 40, 54, 0.08);
}

.ls-learn-assist-card:focus-visible,
.ls-learn-assist-close:focus-visible,
.ls-learn-assist-mode:focus-visible,
.ls-learn-assist-primary:focus-visible,
.ls-learn-assist-question:focus-visible {
  outline: 3px solid rgba(17, 154, 139, 0.28);
  outline-offset: 2px;
}

.ls-learn-assist-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
}

.ls-learn-assist-icon svg {
  width: 1.45rem;
  height: 1.45rem;
}

.ls-learn-assist-icon.is-teal { background: #e4f7f3; color: #0f8f7e; }
.ls-learn-assist-icon.is-blue { background: #eaf2ff; color: #3376df; }
.ls-learn-assist-icon.is-orange { background: #fff0e4; color: #d9772a; }
.ls-learn-assist-icon.is-violet { background: #f2eafe; color: #8054c8; }

.ls-learn-assist-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.32rem;
}

.ls-learn-assist-copy strong {
  color: #172033;
  font-size: 1rem;
  font-weight: 720;
  line-height: 1.25;
}

.ls-learn-assist-copy > span {
  color: #687387;
  font-size: 0.84rem;
  line-height: 1.42;
}

.ls-learn-assist-arrow {
  position: absolute;
  right: 0.9rem;
  bottom: 0.7rem;
  display: inline-flex;
  color: #4f5d70;
  transition: transform 180ms ease;
}

.ls-learn-assist-arrow svg {
  width: 1.1rem;
  height: 1.1rem;
}

.ls-learn-assist-card:hover .ls-learn-assist-arrow {
  transform: translateX(2px);
}

body.ls-learn-assist-open {
  overflow: hidden;
  scrollbar-gutter: stable;
}

.ls-learn-assist-layer {
  position: fixed;
  z-index: 2147483000;
  inset: 0;
}

.ls-learn-assist-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 19, 29, 0.38);
  backdrop-filter: blur(2px);
}

.ls-learn-assist-drawer {
  position: absolute;
  top: 0;
  right: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: min(42rem, 100vw);
  height: 100dvh;
  overflow: hidden;
  border-left: 1px solid #dbe4e8;
  background: #ffffff;
  box-shadow: -24px 0 64px rgba(13, 25, 39, 0.18);
  color: #172033;
  animation: ls-learn-assist-enter 210ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes ls-learn-assist-enter {
  from { transform: translate3d(1.5rem, 0, 0); opacity: 0; }
  to { transform: translate3d(0, 0, 0); opacity: 1; }
}

.ls-learn-assist-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem 1.4rem 1.2rem;
  border-bottom: 1px solid #e3eaed;
  background: rgba(255, 255, 255, 0.97);
}

.ls-learn-assist-header h2,
.ls-learn-assist-content h3,
.ls-learn-assist-header p,
.ls-learn-assist-content p {
  margin: 0;
}

.ls-learn-assist-header h2 {
  color: #111a2a;
  font-size: 1.55rem;
  font-weight: 740;
  line-height: 1.2;
}

.ls-learn-assist-header > div > p:last-child {
  margin-top: 0.35rem;
  color: #677286;
  line-height: 1.45;
}

.ls-learn-assist-kicker {
  margin-bottom: 0.35rem !important;
  color: #0f8f7e !important;
  font-size: 0.72rem !important;
  font-weight: 760 !important;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ls-learn-assist-close {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 2.55rem;
  height: 2.55rem;
  border: 1px solid #dfe7ea;
  border-radius: 50%;
  background: #f8fafb;
  color: #3c495d;
  cursor: pointer;
}

.ls-learn-assist-close svg {
  width: 1.15rem;
  height: 1.15rem;
}

.ls-learn-assist-content {
  overflow: auto;
  overscroll-behavior: contain;
  padding: 1.4rem 1.4rem 2rem;
}

.ls-learn-assist-lead {
  max-width: 58ch;
  margin-bottom: 1.25rem !important;
  color: #59667a;
  font-size: 0.96rem;
  line-height: 1.6;
}

.ls-learn-assist-concepts {
  display: grid;
  gap: 0;
  border-top: 1px solid #e3e9ec;
}

.ls-learn-assist-concept {
  position: relative;
  padding: 1.15rem 0;
  border-bottom: 1px solid #e3e9ec;
}

.ls-learn-assist-concept.is-current {
  padding-left: 1rem;
}

.ls-learn-assist-concept.is-current::before {
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 0;
  width: 3px;
  border-radius: 999px;
  background: #1daf9b;
  content: "";
}

.ls-learn-assist-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.48rem;
  color: #697589;
  font-size: 0.76rem;
}

.ls-learn-assist-chip {
  display: inline-flex;
  padding: 0.22rem 0.48rem;
  border-radius: 999px;
  background: #e8f7f3;
  color: #087d6e;
  font-weight: 700;
}

.ls-learn-assist-concept h3,
.ls-learn-assist-problem h3,
.ls-learn-assist-step h3,
.ls-learn-assist-explanation h3,
.ls-learn-assist-mistakes h3 {
  margin: 0 0 0.38rem;
  color: #182235;
  font-size: 1.02rem;
  line-height: 1.35;
}

.ls-learn-assist-concept > p,
.ls-learn-assist-problem > p,
.ls-learn-assist-step p,
.ls-learn-assist-explanation > p,
.ls-learn-assist-conclusion p,
.ls-learn-assist-mistakes li,
.ls-learn-assist-empty p {
  color: #526076;
  line-height: 1.6;
}

.ls-learn-assist-problem,
.ls-learn-assist-explanation {
  padding: 1.1rem 1.15rem;
  border: 1px solid #dfe8e9;
  border-radius: 8px;
  background: #f8fcfb;
}

.ls-learn-assist-steps {
  display: grid;
  gap: 0;
  margin: 1rem 0 1.2rem;
  padding: 0;
  list-style: none;
}

.ls-learn-assist-step {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1rem 0;
  border-bottom: 1px solid #e3e9ec;
}

.ls-learn-assist-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: #e7f7f3;
  color: #0d8878;
  font-weight: 760;
}

.ls-learn-assist-reason {
  margin-top: 0.4rem !important;
  color: #177b6f !important;
}

.ls-learn-assist-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border: 1px solid #118d7e;
  border-radius: 7px;
  background: #118d7e;
  color: #ffffff;
  font: inherit;
  font-weight: 720;
  cursor: pointer;
}

.ls-learn-assist-primary:disabled {
  cursor: wait;
  opacity: 0.66;
}

.ls-learn-assist-conclusion {
  margin: 1rem 0;
  padding: 1rem 0;
  border-top: 1px solid #dfe7ea;
  border-bottom: 1px solid #dfe7ea;
}

.ls-learn-assist-mistakes {
  margin-top: 1.35rem;
}

.ls-learn-assist-mistakes ul {
  display: grid;
  gap: 0.6rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
}

.ls-learn-assist-mistakes li {
  display: grid;
  gap: 0.18rem;
  padding: 0.75rem 0.85rem;
  border-left: 3px solid #df8b48;
  background: #fff9f3;
}

.ls-learn-assist-mistakes li strong {
  color: #813e18;
}

.ls-learn-assist-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.ls-learn-assist-mode {
  min-height: 2.25rem;
  padding: 0.42rem 0.7rem;
  border: 1px solid #d6e0e4;
  border-radius: 999px;
  background: #ffffff;
  color: #4d5a70;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 680;
  cursor: pointer;
}

.ls-learn-assist-mode.is-active {
  border-color: #158f7f;
  background: #e8f7f3;
  color: #087b6d;
}

.ls-learn-assist-explanation {
  display: grid;
  gap: 0.75rem;
}

.ls-learn-assist-visual {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.75rem;
  margin-top: 0.45rem;
}

.ls-learn-assist-visual-node {
  position: relative;
  padding: 0.85rem;
  border: 1px solid #cfe7e1;
  border-radius: 7px;
  background: #ffffff;
}

.ls-learn-assist-visual-node > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  margin-bottom: 0.5rem;
  border-radius: 50%;
  background: #dff4ef;
  color: #0a7d6e;
  font-size: 0.75rem;
  font-weight: 750;
}

.ls-learn-assist-visual-node strong {
  display: block;
  margin-bottom: 0.2rem;
}

.ls-learn-assist-visual-node p {
  color: #5a677a;
  font-size: 0.86rem;
  line-height: 1.5;
}

.ls-learn-assist-thread {
  display: grid;
  gap: 0.75rem;
  max-height: 46dvh;
  overflow: auto;
  margin-bottom: 1rem;
  padding: 0.2rem;
}

.ls-learn-assist-empty {
  padding: 1.2rem;
  border: 1px solid #dfe8e9;
  border-radius: 8px;
  background: #f8fcfb;
}

.ls-learn-assist-empty strong {
  display: block;
  margin-bottom: 0.35rem;
  color: #172033;
}

.ls-learn-assist-message {
  width: min(90%, 34rem);
  padding: 0.75rem 0.85rem;
  border-radius: 8px;
}

.ls-learn-assist-message > span {
  display: block;
  margin-bottom: 0.2rem;
  color: #627086;
  font-size: 0.72rem;
  font-weight: 730;
}

.ls-learn-assist-message p {
  color: #2b374a;
  line-height: 1.55;
  white-space: pre-wrap;
}

.ls-learn-assist-message.is-user {
  justify-self: end;
  background: #17334a;
}

.ls-learn-assist-message.is-user > span,
.ls-learn-assist-message.is-user p {
  color: #ffffff;
}

.ls-learn-assist-message.is-assistant {
  justify-self: start;
  border: 1px solid #dce6e9;
  background: #f8fafb;
}

.ls-learn-assist-message.is-loading {
  opacity: 0.72;
}

.ls-learn-assist-form {
  display: grid;
  gap: 0.55rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e9ec;
}

.ls-learn-assist-form label {
  color: #263247;
  font-size: 0.86rem;
  font-weight: 720;
}

.ls-learn-assist-question {
  width: 100%;
  min-height: 6rem;
  resize: vertical;
  padding: 0.75rem;
  border: 1px solid #cfdadf;
  border-radius: 8px;
  background: #ffffff;
  color: #172033;
  font: inherit;
  line-height: 1.5;
}

.ls-learn-tool.is-class-active .ls-learn-assist-grid {
  display: none !important;
}

html.ls-dark-mode .ls-learn-assist-card,
html.ls-dark-mode .ls-learn-assist-drawer,
body.ls-dark-mode .ls-learn-assist-card,
body.ls-dark-mode .ls-learn-assist-drawer {
  border-color: #2d3a4d;
  background: #111b2c;
  color: #eef4ff;
}

html.ls-dark-mode .ls-learn-assist-copy strong,
html.ls-dark-mode .ls-learn-assist-header h2,
html.ls-dark-mode .ls-learn-assist-content h3,
html.ls-dark-mode .ls-learn-assist-empty strong,
html.ls-dark-mode .ls-learn-assist-form label,
body.ls-dark-mode .ls-learn-assist-copy strong,
body.ls-dark-mode .ls-learn-assist-header h2,
body.ls-dark-mode .ls-learn-assist-content h3,
body.ls-dark-mode .ls-learn-assist-empty strong,
body.ls-dark-mode .ls-learn-assist-form label {
  color: #f4f7fb;
}

html.ls-dark-mode .ls-learn-assist-copy > span,
html.ls-dark-mode .ls-learn-assist-header p,
html.ls-dark-mode .ls-learn-assist-lead,
html.ls-dark-mode .ls-learn-assist-content p,
body.ls-dark-mode .ls-learn-assist-copy > span,
body.ls-dark-mode .ls-learn-assist-header p,
body.ls-dark-mode .ls-learn-assist-lead,
body.ls-dark-mode .ls-learn-assist-content p {
  color: #bcc8da;
}

html.ls-dark-mode .ls-learn-assist-header,
body.ls-dark-mode .ls-learn-assist-header {
  border-color: #2b394c;
  background: #111b2c;
}

html.ls-dark-mode .ls-learn-assist-concepts,
html.ls-dark-mode .ls-learn-assist-concept,
html.ls-dark-mode .ls-learn-assist-step,
html.ls-dark-mode .ls-learn-assist-form,
body.ls-dark-mode .ls-learn-assist-concepts,
body.ls-dark-mode .ls-learn-assist-concept,
body.ls-dark-mode .ls-learn-assist-step,
body.ls-dark-mode .ls-learn-assist-form {
  border-color: #2c394c;
}

html.ls-dark-mode .ls-learn-assist-problem,
html.ls-dark-mode .ls-learn-assist-explanation,
html.ls-dark-mode .ls-learn-assist-empty,
html.ls-dark-mode .ls-learn-assist-message.is-assistant,
html.ls-dark-mode .ls-learn-assist-visual-node,
body.ls-dark-mode .ls-learn-assist-problem,
body.ls-dark-mode .ls-learn-assist-explanation,
body.ls-dark-mode .ls-learn-assist-empty,
body.ls-dark-mode .ls-learn-assist-message.is-assistant,
body.ls-dark-mode .ls-learn-assist-visual-node {
  border-color: #304056;
  background: #172338;
}

html.ls-dark-mode .ls-learn-assist-mode,
html.ls-dark-mode .ls-learn-assist-question,
html.ls-dark-mode .ls-learn-assist-close,
body.ls-dark-mode .ls-learn-assist-mode,
body.ls-dark-mode .ls-learn-assist-question,
body.ls-dark-mode .ls-learn-assist-close {
  border-color: #34445b;
  background: #142034;
  color: #e8eef8;
}

html.ls-dark-mode .ls-learn-assist-mode.is-active,
body.ls-dark-mode .ls-learn-assist-mode.is-active {
  border-color: #42c9b7;
  background: #173a3a;
  color: #8ee6da;
}

html.ls-dark-mode .ls-learn-assist-mistakes li,
body.ls-dark-mode .ls-learn-assist-mistakes li {
  background: #2d211d;
}

html.ls-dark-mode .ls-learn-assist-mistakes li strong,
body.ls-dark-mode .ls-learn-assist-mistakes li strong {
  color: #ffc59f;
}

@media (max-width: 60rem) {
  .ls-learn-assist-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 43.75rem) {
  .ls-learn-assist-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.65rem;
  }

  .ls-learn-assist-card {
    min-height: 6.4rem;
  }

  .ls-learn-assist-drawer {
    width: 100vw;
    border-left: 0;
  }

  .ls-learn-assist-header,
  .ls-learn-assist-content {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .ls-learn-assist-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.3rem;
  }

  .ls-learn-assist-visual {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ls-learn-assist-card,
  .ls-learn-assist-arrow,
  .ls-learn-assist-drawer {
    animation: none !important;
    transition: none !important;
  }
}