@layer legacy {
/* Canonical Student Learning experience. Legacy and consolidation layers are intentionally merged. */

.student-learning-v2 {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: 10px 0 56px;
  color: var(--aios-text);
}

/* Inline nav icons (mobileNavIcon) ship as outline paths with no inline
   fill/stroke. Without this rule they render as filled black blobs. */
.student-learning-v2 svg {
  width: 20px;
  height: 20px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.slv2-page-head,
.slv2-context-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.slv2-page-head h1,
.slv2-context-head h1 {
  margin: 6px 0 8px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.slv2-page-head p,
.slv2-context-head p {
  margin: 0;
  color: var(--aios-text-muted);
  font-size: 16px;
}

.slv2-nav {
  display: flex;
  gap: 6px;
  padding: 0;
  border: 0;
  background: transparent;
}

.slv2-nav button {
  min-height: 38px;
  padding: 0 14px;
  color: var(--aios-text-muted);
  border: 0;
  border-radius: 8px;
  background: transparent;
}

.slv2-nav button.active,
.slv2-nav button:hover {
  color: var(--aios-text);
  background: var(--aios-surface-hover);
}

.slv2-hero {
  padding: 32px;
  border: 1px solid var(--aios-border);
  border-radius: 18px;
  background: var(--aios-elevated);
}

.slv2-composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
  max-width: 840px;
  margin: 0 auto;
  padding: 10px;
  border: 1px solid var(--aios-border);
  border-radius: 16px;
  background: var(--aios-bg);
}

.slv2-composer textarea {
  min-height: 52px;
  max-height: 180px;
  padding: 14px;
  resize: vertical;
  color: var(--aios-text);
  border: 0;
  outline: 0;
  background: transparent;
  font: inherit;
}

.slv2-composer .primary {
  min-height: 44px;
  white-space: nowrap;
}

.slv2-composer.slv2-aiko-composer {
  min-width: 0;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}

.slv2-quick-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  max-width: 840px;
  margin: 16px auto 0;
}

.slv2-quick-actions button,
.slv2-lesson-actions button {
  min-height: 44px;
  padding: 10px 12px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 10px;
  background: transparent;
  text-align: left;
}

.slv2-quick-actions button:hover,
.slv2-lesson-actions button:hover,
.slv2-subject-row:hover,
.slv2-resource-row:hover {
  background: var(--aios-surface-hover);
}

.slv2-section {
  margin-top: 34px;
}

.slv2-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.slv2-section-head h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.slv2-section-head > span {
  color: var(--aios-text-muted);
  font-size: 13px;
}

.slv2-continue,
.slv2-focus {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: var(--aios-elevated);
}

.slv2-focus {
  margin-bottom: 34px;
}

.slv2-continue span,
.slv2-focus span,
.slv2-question-card > span {
  color: var(--aios-text-muted);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.slv2-continue h3,
.slv2-focus h2 {
  margin: 5px 0 6px;
  font-size: 22px;
}

.slv2-continue p,
.slv2-focus p {
  max-width: 700px;
  margin: 0;
  color: var(--aios-text-muted);
}

/* The shared tactile layer gives every button a 2px contour, so a flush
   divider list reads as a stack of cards glued edge to edge. Space them. */
.slv2-subject-list,
.slv2-resource-list,
.slv2-work-list {
  display: grid;
  gap: 10px;
}

.slv2-subject-row,
.slv2-resource-row,
.slv2-work-row {
  width: 100%;
  min-height: 72px;
  display: grid;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: transparent;
  text-align: left;
}

.slv2-subject-row {
  grid-template-columns: 36px minmax(0, 1fr) auto 24px;
}

.slv2-resource-row,
.slv2-work-row {
  grid-template-columns: minmax(0, 1fr) auto;
}

.slv2-subject-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--aios-text-muted);
  border: 1px solid var(--aios-border);
  border-radius: 9px;
}

.slv2-subject-copy,
.slv2-resource-row > span:first-child,
.slv2-work-row > div {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.slv2-subject-copy small,
.slv2-resource-row small,
.slv2-work-row small,
.slv2-subject-level {
  overflow: hidden;
  color: var(--aios-text-muted);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-empty {
  padding: 28px 0;
  color: var(--aios-text-muted);
}

.slv2-empty-large {
  min-height: 240px;
  display: grid;
  place-items: center;
}

.slv2-context-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
}

.slv2-context-head > button {
  min-height: 44px;
}

.slv2-lesson-reader {
  max-width: 780px;
  margin: 0 auto;
  color: var(--aios-text);
  font-size: 17px;
  line-height: 1.75;
}

.slv2-lesson-reader h1,
.slv2-lesson-reader h2,
.slv2-lesson-reader h3 {
  margin-top: 1.6em;
  line-height: 1.2;
}

.slv2-lesson-reader pre,
.slv2-lesson-reader table,
.slv2-lesson-reader img {
  max-width: 100%;
  overflow-x: auto;
}

.slv2-lesson-actions {
  max-width: 780px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 34px auto 16px;
}

.slv2-lesson-composer {
  max-width: 780px;
}

.slv2-exercise-page {
  max-width: 900px;
}

.slv2-exercise-progress {
  height: 4px;
  overflow: hidden;
  margin-bottom: 28px;
  border-radius: 999px;
  background: var(--aios-surface);
}

.slv2-exercise-progress i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--aios-accent);
}

.slv2-question-card {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px;
  border: 1px solid var(--aios-border);
  border-radius: 16px;
  background: var(--aios-elevated);
}

.slv2-question-card h2 {
  margin: 8px 0 24px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.3;
}

.slv2-choice-list {
  display: grid;
  gap: 10px;
}

.slv2-choice-list button {
  min-height: 56px;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 11px;
  background: transparent;
  text-align: left;
}

.slv2-choice-list button.selected {
  border-color: var(--aios-accent);
  background: var(--aios-accent-soft);
}

.slv2-choice-list b {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--aios-border);
  border-radius: 8px;
}

.slv2-question-card textarea {
  width: 100%;
  min-height: 130px;
  padding: 14px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 11px;
  background: var(--aios-bg);
  font: inherit;
}

.slv2-question-actions,
.slv2-exercise-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}

.slv2-exercise-footer {
  max-width: 760px;
  margin: 16px auto 0;
}

.slv2-feedback {
  margin-top: 16px;
  padding: 12px 14px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 10px;
  background: var(--aios-surface);
}

.slv2-feedback.correct {
  border-color: color-mix(in srgb, var(--aios-success, #16a34a) 42%, var(--aios-border));
}

.slv2-feedback.retry {
  border-color: color-mix(in srgb, var(--aios-warning, #d97706) 42%, var(--aios-border));
}

.slv2-result {
  min-height: 320px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 14px;
  text-align: center;
}

.slv2-result > span {
  color: var(--aios-text-muted);
}

.slv2-result > strong {
  font-size: clamp(54px, 8vw, 84px);
  letter-spacing: -0.06em;
}

@media (max-width: 900px) {
  .slv2-quick-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .slv2-page-head {
    align-items: stretch;
    flex-direction: column;
  }

  .slv2-nav {
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .student-learning-v2 {
    padding-top: 0;
  }

  .slv2-page-head,
  .slv2-context-head {
    gap: 16px;
    margin-bottom: 24px;
  }

  .slv2-page-head h1,
  .slv2-context-head h1 {
    font-size: 32px;
  }

  .slv2-hero,
  .slv2-question-card {
    padding: 18px;
    border-radius: 14px;
  }

  .slv2-composer,
  .slv2-context-head,
  .slv2-resource-row,
  .slv2-work-row {
    grid-template-columns: 1fr;
  }

  .slv2-composer .primary,
  .slv2-context-head > .secondary,
  .slv2-continue .primary,
  .slv2-focus .primary,
  .slv2-work-row .primary {
    width: 100%;
  }

  .slv2-quick-actions {
    grid-template-columns: 1fr;
  }

  .slv2-continue,
  .slv2-focus {
    align-items: stretch;
    flex-direction: column;
    padding: 18px;
  }

  .slv2-subject-row {
    grid-template-columns: 34px minmax(0, 1fr) 20px;
  }

  .slv2-subject-level {
    display: none;
  }

  .slv2-question-actions button,
  .slv2-exercise-footer button {
    min-height: 44px;
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .student-learning-v2 *,
  .student-learning-v2 *::before,
  .student-learning-v2 *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Canonical responsive and interaction refinements */
.student-learning-v2-consolidated {
  width: min(100%, 980px);
  padding-bottom: 72px;
}

.slv2-page-head-consolidated {
  margin-bottom: 30px;
}

.slv2-page-head-consolidated h1,
.slv2-context-head-consolidated h1 {
  max-width: 760px;
}

.slv2-head-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slv2-nav-consolidated {
  flex: 0 0 auto;
}

.slv2-nav-consolidated button {
  min-height: 44px;
}

.slv2-hero-consolidated {
  padding: clamp(22px, 4vw, 38px);
  border-radius: 20px;
  background: var(--aios-elevated);
}

.slv2-quick-actions-consolidated button {
  display: grid;
  align-content: center;
  gap: 4px;
  min-height: 68px;
  text-align: left;
}

.slv2-quick-actions-consolidated strong {
  font-size: 14px;
  font-weight: 650;
}

.slv2-quick-actions-consolidated small {
  color: var(--aios-text-muted);
  font-size: 12px;
  line-height: 1.35;
}

.slv2-continue-consolidated {
  min-height: 148px;
}

.slv2-section-first {
  margin-top: 0;
}

.slv2-section-head > div {
  min-width: 0;
}

.slv2-section-head > div > h2 {
  margin: 0;
}

.slv2-section-head > div > p {
  margin: 4px 0 0;
  color: var(--aios-text-muted);
  font-size: 13px;
}

.slv2-inline-link {
  min-height: 40px;
  padding-inline: 10px;
}

.slv2-subject-row-consolidated {
  min-height: 78px;
}

.slv2-review-list {
  display: grid;
  gap: 10px;
}

.slv2-review-list > button {
  width: 100%;
  min-height: 70px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: transparent;
  text-align: left;
}

.slv2-review-list > button:hover {
  background: var(--aios-surface-hover);
}

.slv2-review-list > button > span:first-child {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.slv2-review-list strong,
.slv2-review-list small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-review-list small {
  color: var(--aios-text-muted);
  font-size: 13px;
}

.slv2-context-head-consolidated {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.slv2-file-bar {
  max-width: 780px;
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 auto 26px;
  padding: 10px 12px 10px 16px;
  border: 1px solid var(--aios-border);
  border-radius: 13px;
  background: var(--aios-surface);
}

.slv2-file-bar > span {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.slv2-file-bar strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-file-bar a {
  flex: 0 0 auto;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

/* Lesson attachments are read inside AIOS: the bar names the file and keeps an
   escape hatch to a new tab, the viewer under it shows the document itself. */
.slv2-attachment {
  max-width: 780px;
  display: grid;
  gap: 10px;
  margin: 0 auto 26px;
}

.slv2-attachment .slv2-file-bar {
  max-width: none;
  margin: 0;
}

.slv2-attachment-frame {
  width: 100%;
  height: clamp(420px, 72vh, 900px);
  display: block;
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: var(--aios-surface);
}

.slv2-attachment-image {
  width: 100%;
  max-height: clamp(320px, 62vh, 760px);
  display: block;
  object-fit: contain;
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: var(--aios-surface);
}

.slv2-attachment-state {
  min-height: 64px;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 16px;
  color: var(--aios-text-muted);
  border: 1px dashed var(--aios-border);
  border-radius: 14px;
  font-size: 13px;
  text-align: center;
}

.slv2-attachment-error {
  color: var(--aios-danger);
  border-style: solid;
}

.slv2-lesson-empty {
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
}

.slv2-lesson-assistant {
  max-width: 780px;
  margin: 42px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--aios-border);
}

.slv2-lesson-assistant > p {
  margin: 0 0 12px;
  color: var(--aios-text-muted);
  font-size: 13px;
}

.slv2-lesson-assistant .slv2-lesson-actions {
  margin-top: 0;
}

.slv2-lesson-nav {
  max-width: 780px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 30px auto 0;
}

.slv2-lesson-nav button {
  min-height: 72px;
  display: grid;
  gap: 5px;
  padding: 14px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 12px;
  background: transparent;
  text-align: left;
}

.slv2-lesson-nav button:last-child {
  text-align: right;
}

.slv2-lesson-nav button:hover {
  background: var(--aios-surface-hover);
}

.slv2-lesson-nav small {
  color: var(--aios-text-muted);
}

.slv2-hint strong {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
}

.slv2-hint p,
.slv2-result p {
  margin: 0;
  color: var(--aios-text-muted);
}

.slv2-result {
  max-width: 680px;
  margin: 0 auto;
}

.slv2-result .button-row {
  justify-content: center;
}

.slv2-empty-large > div {
  max-width: 500px;
  display: grid;
  justify-items: center;
  gap: 14px;
  text-align: center;
}

.slv2-empty-large p {
  margin: 0;
}

.student-learning-v2-consolidated button:focus-visible,
.student-learning-v2-consolidated a:focus-visible,
.student-learning-v2-consolidated textarea:focus-visible,
.student-learning-v2-consolidated [tabindex="-1"]:focus-visible {
  outline: 2px solid var(--aios-accent);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .slv2-head-tools {
    width: 100%;
    justify-content: space-between;
  }

  .slv2-nav-consolidated {
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .student-learning-v2-consolidated {
    padding-bottom: 48px;
  }

  .slv2-head-tools,
  .slv2-file-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .slv2-nav-consolidated {
    width: 100%;
  }

  .slv2-nav-consolidated button {
    flex: 1;
  }

  .slv2-hero-consolidated {
    padding: 16px;
  }

  .slv2-quick-actions-consolidated button {
    min-height: 60px;
  }

  .slv2-context-head-consolidated {
    grid-template-columns: 1fr;
  }

  .slv2-context-head-consolidated > button,
  .slv2-context-head-consolidated > .secondary,
  .slv2-file-bar a {
    width: 100%;
    justify-content: center;
  }

  .slv2-file-bar strong {
    white-space: normal;
  }

  .slv2-lesson-nav {
    grid-template-columns: 1fr;
  }

  .slv2-lesson-nav button:last-child {
    text-align: left;
  }

  .slv2-result .button-row {
    width: 100%;
    flex-direction: column;
  }

  .slv2-result .button-row button {
    width: 100%;
  }
}
}

@layer legacy {
/* Learning navigation icons share one optical box while this surface is
   active. The legacy shell uses important sizing, so keep this bridge narrow. */
#app .app-shell[data-active-view="learning"] .sidebar .nav-item-icon,
#app .app-shell[data-active-view="learning"] .mobile-shell-menu,
#app .app-shell[data-active-view="learning"] .mobile-shell-new-chat,
#app .app-shell[data-active-view="learning"] .mobile-shell-header .icon-symbol {
  display: grid !important;
  place-items: center !important;
  line-height: 0 !important;
}

#app .app-shell[data-active-view="learning"] .sidebar .nav-item-icon svg {
  width: 18px !important;
  height: 18px !important;
  display: block !important;
  margin: 0 !important;
  transform: none !important;
  transform-origin: 50% 50% !important;
  shape-rendering: geometricPrecision;
}

#app .app-shell[data-active-view="learning"] .mobile-shell-header .icon-menu,
#app .app-shell[data-active-view="learning"] .mobile-shell-header .icon-plus {
  width: 20px !important;
  height: 20px !important;
  margin: 0 !important;
  transform: none !important;
}
}

@layer aios.components {
/* Learning Home — warm, progress-led and conversation-first. */
.slv2-home-redesign {
  --slv2-home-accent-soft: color-mix(in srgb, var(--aios-accent) 11%, var(--aios-elevated));
  --slv2-home-accent-border: color-mix(in srgb, var(--aios-accent) 34%, var(--aios-border));
  --slv2-home-ring-rest: color-mix(in srgb, var(--aios-border) 70%, var(--aios-elevated));
}

.slv2-home-redesign .slv2-page-head-consolidated {
  align-items: center;
  margin-bottom: 26px;
}

.slv2-home-redesign .slv2-page-head-consolidated h1 {
  font-size: clamp(30px, 3.4vw, 40px);
}

.slv2-home-redesign h1,
.slv2-home-redesign h2,
.slv2-home-redesign h3,
.slv2-home-redesign strong {
  color: var(--aios-text);
}

.slv2-home-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(250px, .75fr);
  gap: 16px;
}

.slv2-next-step,
.slv2-progress-card,
.slv2-aiko {
  border: 1px solid var(--aios-border);
  border-radius: 18px;
  background: var(--aios-elevated);
}

.slv2-next-step {
  min-height: 286px;
  display: flex;
  align-items: stretch;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(22px, 4vw, 34px);
  border-color: var(--slv2-home-accent-border);
  background: var(--slv2-home-accent-soft);
}

.slv2-next-step-top,
.slv2-progress-heading,
.slv2-aiko-intro {
  display: flex;
  align-items: center;
  gap: 12px;
}

.slv2-next-step-top {
  justify-content: space-between;
}

.slv2-status-pill {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  padding: 0 11px;
  color: var(--aios-accent-strong);
  border: 1px solid var(--slv2-home-accent-border);
  border-radius: 999px;
  background: var(--aios-elevated);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .02em;
}

.slv2-next-step-time {
  color: var(--aios-text-muted);
  font-size: 13px;
  font-weight: 650;
}

.slv2-next-step-copy {
  min-width: 0;
}

.slv2-next-step-copy > span {
  color: var(--aios-text-muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.slv2-next-step-copy h3 {
  max-width: 650px;
  margin: 8px 0;
  font-size: clamp(25px, 3.3vw, 36px);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.slv2-next-step-copy p {
  max-width: 610px;
  margin: 0;
  color: var(--aios-text-muted);
  line-height: 1.55;
}

.slv2-next-step > .primary {
  width: fit-content;
  min-height: 48px;
  padding-inline: 20px;
  align-self: flex-start;
}

.slv2-progress-card {
  min-height: 286px;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.slv2-progress-icon,
.slv2-quick-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  line-height: 0;
  color: var(--aios-accent);
  background: var(--slv2-home-accent-soft);
}

.slv2-home-icon {
  width: 20px;
  height: 20px;
  display: block;
  flex: 0 0 auto;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transform: none;
  transform-origin: 50% 50%;
  shape-rendering: geometricPrecision;
}

.slv2-home-icon-fill {
  fill: currentColor;
  stroke: none;
}

/* The heading badge used to be a pale square with a sparkle lost inside it.
   It now draws the same number the card announces: a conic ring filled to
   `--slv2-progress` (set from the measured percentage in student-learning.js),
   with the spark sitting on an inner plate. Purely presentational — the
   accessible value stays on the progressbar below. */
.slv2-progress-icon {
  position: relative;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 999px;
  background: conic-gradient(
    from -90deg,
    var(--aios-success) calc(var(--slv2-progress, 0) * 1%),
    var(--slv2-home-ring-rest) 0
  );
}

.slv2-progress-icon::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: inherit;
  border: 1px solid var(--slv2-home-accent-border);
  background: var(--slv2-home-accent-soft);
}

.slv2-progress-icon .slv2-home-icon {
  position: relative;
}

.slv2-aiko-character {
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: transparent;
  line-height: 0;
}

.slv2-aiko-character img {
  width: 76px;
  height: 76px;
  display: block;
  object-fit: contain;
  transform: none;
}

.slv2-progress-heading > div {
  min-width: 0;
}

.slv2-progress-heading span:not(.slv2-progress-icon) {
  color: var(--aios-text-muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.slv2-progress-heading h2 {
  margin: 2px 0 0;
  font-size: 21px;
  letter-spacing: -.025em;
}

.slv2-progress-card > p {
  margin: 22px 0 12px;
  color: var(--aios-text-muted);
  font-size: 13px;
  line-height: 1.45;
}

.slv2-progress-track {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--aios-surface-hover);
}

.slv2-progress-track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--aios-success);
  transition: width 220ms ease-out;
}

.slv2-progress-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: auto 0 0;
}

.slv2-progress-stats > div {
  min-width: 0;
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
  padding: 10px 8px;
  border-radius: 11px;
  background: var(--aios-surface-subtle);
  text-align: center;
}

.slv2-progress-stats dt {
  overflow: hidden;
  color: var(--aios-text-muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-progress-stats dd {
  margin: 0;
  font-size: 20px;
  font-weight: 750;
}

.slv2-aiko {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  align-items: center;
  gap: 24px;
  margin-top: 16px;
  padding: clamp(20px, 3.4vw, 30px);
}

.slv2-aiko-intro > div {
  min-width: 0;
}

.slv2-aiko-intro h2 {
  margin: 4px 0 5px;
  font-size: clamp(20px, 2.4vw, 27px);
  letter-spacing: -.025em;
}

.slv2-aiko-intro p {
  margin: 0;
  color: var(--aios-text-muted);
  font-size: 13px;
  line-height: 1.45;
}

.slv2-aiko-composer {
  width: 100%;
  margin: 0;
  border-color: var(--slv2-home-accent-border);
  background: var(--aios-surface);
}

.slv2-quick-section {
  margin-top: 38px;
}

.slv2-quick-section .slv2-section-head {
  align-items: flex-end;
}

.slv2-quick-section .slv2-section-head h2,
.slv2-home-subjects .slv2-section-head h2 {
  margin-top: 3px;
}

.slv2-home-redesign .slv2-quick-actions-consolidated {
  max-width: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 0;
}

.slv2-home-redesign .slv2-quick-actions-consolidated button {
  min-height: 92px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: 16px;
  background: var(--aios-elevated);
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.slv2-home-redesign .slv2-quick-actions-consolidated button:hover {
  border-color: var(--slv2-home-accent-border);
  background: var(--slv2-home-accent-soft);
  transform: translateY(-2px);
}

.slv2-home-redesign .slv2-quick-actions-consolidated button > span:nth-child(2) {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.slv2-home-redesign .slv2-quick-actions-consolidated strong,
.slv2-home-redesign .slv2-quick-actions-consolidated small {
  display: block;
  white-space: normal;
}

.slv2-quick-icon {
  width: 42px;
  height: 42px;
  border-radius: 13px;
}

.slv2-quick-arrow,
.slv2-subject-arrow,
.slv2-review-arrow {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  flex: 0 0 20px;
  line-height: 0;
  color: var(--aios-text-muted);
}

.slv2-quick-arrow .slv2-home-icon,
.slv2-subject-arrow .slv2-home-icon,
.slv2-review-arrow .slv2-home-icon {
  width: 18px;
  height: 18px;
}

.slv2-home-redesign .slv2-subject-icon {
  display: grid;
  place-items: center;
  line-height: 0;
}

.slv2-home-redesign .slv2-subject-icon .slv2-home-icon {
  width: 20px;
  height: 20px;
}

.slv2-home-redesign .slv2-review-section,
.slv2-home-subjects {
  margin-top: 40px;
}

@media (max-width: 900px) {
  .slv2-home-overview,
  .slv2-aiko {
    grid-template-columns: 1fr;
  }

  .slv2-progress-card {
    min-height: 0;
  }

  .slv2-progress-stats {
    margin-top: 20px;
  }

  .slv2-home-redesign .slv2-quick-actions-consolidated {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .slv2-home-redesign .slv2-page-head-consolidated {
    align-items: stretch;
  }

  .slv2-home-redesign .slv2-page-head-consolidated h1 {
    font-size: 34px;
  }

  .slv2-next-step,
  .slv2-progress-card,
  .slv2-aiko {
    border-radius: 18px;
  }

  .slv2-next-step {
    min-height: 0;
    padding: 20px;
  }

  .slv2-next-step > .primary,
  .slv2-aiko-composer .primary {
    width: 100%;
  }

  .slv2-next-step-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .slv2-aiko-intro {
    align-items: flex-start;
  }

  .slv2-aiko-character {
    width: 64px;
    height: 64px;
    border-radius: 18px;
  }

  .slv2-aiko-character img {
    width: 64px;
    height: 64px;
  }

  .slv2-home-redesign .slv2-quick-actions-consolidated button {
    min-height: 82px;
  }
}

/* Mes matières — colorful academic journeys built on real published work. */
.slv2-tone-0 { --slv2-subject: #2557c5; }
.slv2-tone-1 { --slv2-subject: #6b48c8; }
.slv2-tone-2 { --slv2-subject: #087766; }
.slv2-tone-3 { --slv2-subject: #9a4d08; }
.slv2-tone-4 { --slv2-subject: #a92855; }
.slv2-tone-5 { --slv2-subject: #3346b3; }
.slv2-tone-6 { --slv2-subject: #3e4fb2; }
.slv2-tone-7 { --slv2-subject: #8b3f93; }
.slv2-tone-8 { --slv2-subject: #176d9a; }
.slv2-tone-9 { --slv2-subject: #7a6120; }

.slv2-subjects-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-bottom: 34px;
  border: 1px solid var(--aios-border);
  border-radius: 18px;
  background: var(--aios-border);
}

.slv2-subjects-overview > div {
  min-height: 86px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 3px;
  padding: 14px 10px;
  background: var(--aios-elevated);
  text-align: center;
}

.slv2-subjects-overview span {
  color: var(--aios-text);
  font-size: 25px;
  line-height: 1;
  font-weight: 800;
}

.slv2-subjects-overview small {
  color: var(--aios-text-muted);
  font-size: 12px;
}

.slv2-subject-library .slv2-section-head {
  align-items: flex-end;
  margin-bottom: 16px;
}

.slv2-subject-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.slv2-subject-card {
  --slv2-subject-soft: color-mix(in srgb, var(--slv2-subject) 10%, var(--aios-elevated));
  --slv2-subject-border: color-mix(in srgb, var(--slv2-subject) 34%, var(--aios-border));
  width: 100%;
  min-width: 0;
  min-height: 292px;
  display: flex;
  align-items: stretch;
  flex-direction: column;
  gap: 18px;
  padding: 20px;
  color: var(--aios-text);
  border: 1px solid var(--slv2-subject-border);
  border-radius: 22px;
  background: var(--slv2-subject-soft);
  text-align: left;
  box-shadow: 0 10px 28px color-mix(in srgb, var(--slv2-subject) 8%, transparent);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.slv2-subject-card:hover {
  border-color: color-mix(in srgb, var(--slv2-subject) 58%, var(--aios-border));
  box-shadow: 0 16px 34px color-mix(in srgb, var(--slv2-subject) 13%, transparent);
  transform: translateY(-3px);
}

.slv2-subject-card-top,
.slv2-subject-card-next,
.slv2-subject-card-progress > span,
.slv2-path-card-top,
.slv2-path-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.slv2-subject-card-icon,
.slv2-subject-hero-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--slv2-subject);
  border: 1px solid var(--slv2-subject-border, color-mix(in srgb, var(--slv2-subject) 34%, var(--aios-border)));
  background: var(--aios-elevated);
  line-height: 0;
}

.slv2-subject-card-icon {
  width: 50px;
  height: 50px;
  border-radius: 16px;
}

.slv2-subject-card-icon .slv2-home-icon {
  width: 23px;
  height: 23px;
}

.slv2-subject-card-icon .slv2-home-icon,
.slv2-subject-hero-icon .slv2-home-icon,
.slv2-path-node .slv2-home-icon {
  stroke-width: 1.8;
}

.slv2-subject-card-mastery {
  min-width: 0;
  display: grid;
  justify-items: end;
  gap: 2px;
  text-align: right;
}

.slv2-subject-card-mastery b {
  color: var(--aios-text-muted);
  font-size: 18px;
}

.slv2-subject-card-mastery.has-evidence b {
  color: var(--slv2-subject);
}

.slv2-subject-card-mastery small,
.slv2-subject-card-copy small,
.slv2-subject-card-progress small,
.slv2-subject-card-next small {
  color: var(--aios-text-muted);
  font-size: 11px;
  line-height: 1.35;
}

.slv2-subject-card-copy {
  display: grid;
  gap: 5px;
}

.slv2-subject-card-copy strong {
  overflow: hidden;
  font-size: 25px;
  line-height: 1.08;
  letter-spacing: -.035em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-subject-card-progress {
  display: grid;
  gap: 10px;
}

.slv2-subject-card-progress > span {
  align-items: flex-end;
}

.slv2-subject-card-progress > span > b {
  font-size: 12px;
}

.slv2-subject-card-progress i,
.slv2-subject-progress-track {
  height: 9px;
  display: block;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--slv2-subject) 12%, var(--aios-surface-hover));
}

.slv2-subject-card-progress i em,
.slv2-subject-progress-track i {
  height: 100%;
  display: block;
  border-radius: inherit;
  background: var(--slv2-subject);
  transition: width 220ms ease-out;
}

.slv2-subject-card-next {
  min-height: 58px;
  margin-top: auto;
  padding: 11px 12px;
  border-radius: 14px;
  background: var(--aios-elevated);
}

.slv2-subject-card-next > span:first-child {
  min-width: 0;
  display: grid;
  gap: 3px;
}

.slv2-subject-card-next b {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-subject-card-next > span:last-child {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex: 0 0 28px;
  color: var(--slv2-subject);
  line-height: 0;
}

.slv2-subject-card-next > span:last-child .slv2-home-icon {
  width: 21px;
  height: 21px;
}

.slv2-subjects-empty,
.slv2-data-error {
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 18px;
  padding: 34px;
  border: 1px dashed var(--aios-border);
  border-radius: 22px;
  background: var(--aios-elevated);
  text-align: center;
}

.slv2-subjects-empty > div,
.slv2-data-error > div {
  max-width: 520px;
}

.slv2-subjects-empty h3,
.slv2-data-error h1 {
  margin: 0 0 7px;
}

.slv2-subjects-empty p,
.slv2-data-error p {
  margin: 0;
  color: var(--aios-text-muted);
  line-height: 1.55;
}

.slv2-data-error > span {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  color: var(--aios-accent);
  border-radius: 17px;
  background: color-mix(in srgb, var(--aios-accent) 10%, var(--aios-elevated));
}

.slv2-subject-journey {
  --slv2-subject-soft: color-mix(in srgb, var(--slv2-subject) 10%, var(--aios-elevated));
  --slv2-subject-border: color-mix(in srgb, var(--slv2-subject) 34%, var(--aios-border));
  --slv2-subject-deep: color-mix(in srgb, var(--slv2-subject) 78%, #12213d);
}

.slv2-subject-context {
  align-items: center;
}

.slv2-subject-context h1 {
  font-size: clamp(34px, 4.4vw, 50px);
}

.slv2-subject-context .ghost .slv2-home-icon {
  width: 18px;
  height: 18px;
}

.slv2-subject-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, .72fr);
  gap: 22px 30px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--slv2-subject-border);
  border-radius: 24px;
  background: var(--slv2-subject-soft);
}

.slv2-subject-hero-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.slv2-subject-hero-main > div {
  min-width: 0;
}

.slv2-subject-hero-icon {
  width: 62px;
  height: 62px;
  border-radius: 19px;
}

.slv2-subject-hero-icon .slv2-home-icon {
  width: 28px;
  height: 28px;
}

.slv2-subject-hero h2 {
  margin: 5px 0;
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.slv2-subject-hero p {
  margin: 0;
  color: var(--aios-text-muted);
  font-size: 13px;
}

.slv2-subject-progress-track {
  grid-column: 1 / -1;
}

.slv2-subject-next {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--slv2-subject-border);
  border-radius: 17px;
  background: var(--aios-elevated);
}

.slv2-subject-next > div {
  min-width: 0;
  display: grid;
  gap: 3px;
}

.slv2-subject-next span,
.slv2-subject-next small {
  color: var(--aios-text-muted);
  font-size: 11px;
}

.slv2-subject-next strong {
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slv2-journey-section {
  margin-top: 38px;
}

.slv2-journey-head {
  align-items: flex-end;
  gap: 22px;
  margin-bottom: 18px;
}

.slv2-subject-modes {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: var(--aios-elevated);
}

.slv2-subject-modes button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 12px;
  color: var(--aios-text-muted);
  border: 0;
  border-radius: 10px;
  background: transparent;
  font-size: 12px;
  font-weight: 700;
}

.slv2-subject-modes button span {
  min-width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--aios-surface-hover);
  font-size: 10px;
}

.slv2-subject-modes button.active {
  color: var(--slv2-subject);
  background: var(--slv2-subject-soft);
}

.slv2-subject-modes button.active span {
  background: var(--aios-elevated);
}

.slv2-path-list {
  position: relative;
  max-width: 800px;
  display: grid;
  gap: 18px;
  margin: 0 auto;
  padding: 12px 42px 18px 0;
  list-style: none;
}

.slv2-path-list::before {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 30px;
  left: 27px;
  width: 4px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--slv2-subject) 25%, var(--aios-border));
}

.slv2-path-step {
  --slv2-step-shift: 0px;
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
}

.slv2-path-step:nth-child(3n + 2) { --slv2-step-shift: 28px; }
.slv2-path-step:nth-child(3n + 3) { --slv2-step-shift: 12px; }

.slv2-path-node {
  position: relative;
  z-index: var(--z-raised);
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  color: #fff;
  border: 5px solid var(--aios-page);
  border-radius: 18px;
  background: var(--slv2-subject-deep);
  box-shadow: 0 5px 0 color-mix(in srgb, var(--slv2-subject-deep) 70%, #071325);
  line-height: 0;
}

.slv2-path-node .slv2-home-icon {
  width: 22px;
  height: 22px;
}

.slv2-path-step.is-available .slv2-path-node {
  background: var(--slv2-subject-deep);
}

.slv2-path-step.is-completed .slv2-path-node {
  background: #21835d;
  box-shadow: 0 5px 0 #14553d;
}

.slv2-path-step.is-locked .slv2-path-node,
.slv2-path-step.is-unavailable .slv2-path-node {
  color: var(--aios-text-muted);
  background: var(--aios-surface-hover);
  box-shadow: 0 5px 0 var(--aios-border);
}

.slv2-path-card {
  position: relative;
  min-width: 0;
  min-height: 168px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--aios-border);
  border-radius: 20px;
  background: var(--aios-elevated);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--slv2-subject) 7%, transparent);
  transform: translateX(var(--slv2-step-shift));
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.slv2-path-card::before {
  content: "";
  position: absolute;
  top: 50%;
  right: 100%;
  width: calc(17px + var(--slv2-step-shift));
  height: 3px;
  background: color-mix(in srgb, var(--slv2-subject) 25%, var(--aios-border));
  transform: translateY(-50%);
}

.slv2-path-step.is-next .slv2-path-card {
  border: 2px solid var(--slv2-subject);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--slv2-subject) 15%, transparent);
}

.slv2-path-step.is-completed .slv2-path-card {
  border-color: color-mix(in srgb, #21835d 38%, var(--aios-border));
  background: color-mix(in srgb, #21835d 7%, var(--aios-elevated));
}

.slv2-path-step.is-locked .slv2-path-card,
.slv2-path-step.is-unavailable .slv2-path-card {
  color: var(--aios-text-muted);
  background: color-mix(in srgb, var(--aios-surface-hover) 68%, var(--aios-elevated));
  box-shadow: none;
}

.slv2-path-card-top > span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--slv2-subject);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.slv2-path-state {
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0 9px;
  color: var(--slv2-subject);
  border-radius: 999px;
  background: var(--slv2-subject-soft);
  font-size: 10px;
  font-weight: 800;
}

.slv2-path-card-top > span:first-child .slv2-home-icon {
  width: 15px;
  height: 15px;
}

.slv2-path-state .slv2-home-icon {
  width: 13px;
  height: 13px;
  stroke-width: 2;
}

.is-completed .slv2-path-state {
  color: #166443;
  background: color-mix(in srgb, #21835d 12%, var(--aios-elevated));
}

.is-locked .slv2-path-card-top > span:first-child,
.is-locked .slv2-path-state,
.is-unavailable .slv2-path-card-top > span:first-child,
.is-unavailable .slv2-path-state {
  color: var(--aios-text-muted);
}

.is-locked .slv2-path-state,
.is-unavailable .slv2-path-state {
  background: var(--aios-surface-hover);
}

.slv2-path-card h3 {
  margin: 1px 0 0;
  font-size: 19px;
  line-height: 1.18;
  letter-spacing: -.025em;
}

.slv2-path-card p {
  margin: 0;
  color: var(--aios-text-muted);
  font-size: 12px;
  line-height: 1.5;
}

.slv2-path-card-foot {
  align-items: flex-end;
  margin-top: auto;
}

.slv2-path-card-foot > small {
  min-width: 0;
  color: var(--aios-text-muted);
  font-size: 10px;
}

.slv2-step-action,
.slv2-step-done {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 0 14px;
  border-radius: 13px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1;
}

.slv2-step-action {
  color: #fff;
  border: 1px solid var(--slv2-subject-deep);
  background: var(--slv2-subject-deep);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--slv2-subject-deep) 72%, #071325);
}

.slv2-step-action:hover:not(:disabled) {
  transform: translateY(-1px);
}

.slv2-step-action:active:not(:disabled) {
  box-shadow: 0 2px 0 color-mix(in srgb, var(--slv2-subject-deep) 72%, #071325);
  transform: translateY(2px);
}

.slv2-step-action:disabled {
  color: var(--aios-text-muted);
  border-color: var(--aios-border);
  background: var(--aios-surface-hover);
  box-shadow: none;
}

.slv2-step-action .slv2-home-icon,
.slv2-step-done .slv2-home-icon {
  width: 16px;
  height: 16px;
}

.slv2-step-done {
  color: #166443;
  background: color-mix(in srgb, #21835d 12%, var(--aios-elevated));
}

.slv2-journey-empty {
  min-height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 30px;
  border: 1px dashed var(--slv2-subject-border);
  border-radius: 20px;
  background: var(--slv2-subject-soft);
}

.slv2-journey-empty > span {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--slv2-subject);
  border-radius: 15px;
  background: var(--aios-elevated);
}

.slv2-journey-empty h3,
.slv2-journey-empty p {
  margin: 0;
}

.slv2-journey-empty p {
  margin-top: 5px;
  color: var(--aios-text-muted);
  font-size: 13px;
}

html[data-theme="dark"] .slv2-subject-card-icon,
html[data-theme="dark"] .slv2-subject-card-mastery.has-evidence b,
html[data-theme="dark"] .slv2-subject-card-next > span:last-child,
html[data-theme="dark"] .slv2-subject-hero-icon,
html[data-theme="dark"] .slv2-subject-modes button.active,
html[data-theme="dark"] .slv2-path-card-top > span:first-child,
html[data-theme="dark"] .slv2-path-state {
  color: color-mix(in srgb, var(--slv2-subject) 55%, #fff);
}

html[data-theme="dark"] .slv2-path-step.is-completed .slv2-path-state,
html[data-theme="dark"] .slv2-step-done {
  color: #82dcb6;
}

@media (max-width: 900px) {
  .slv2-subject-hero {
    grid-template-columns: 1fr;
  }

  .slv2-subject-next {
    grid-column: 1;
    grid-row: auto;
  }

  .slv2-journey-head {
    align-items: stretch;
    flex-direction: column;
  }

  .slv2-subject-modes {
    width: fit-content;
  }
}

@media (max-width: 640px) {
  .slv2-subjects-overview {
    margin-bottom: 28px;
    border-radius: 15px;
  }

  .slv2-subjects-overview > div {
    min-height: 78px;
    padding: 12px 5px;
  }

  .slv2-subjects-overview span {
    font-size: 21px;
  }

  .slv2-subjects-overview small {
    font-size: 10px;
  }

  .slv2-subject-grid {
    grid-template-columns: 1fr;
  }

  .slv2-subject-card {
    min-height: 276px;
    padding: 18px;
    border-radius: 19px;
  }

  .slv2-subject-context {
    align-items: stretch;
  }

  .slv2-subject-hero {
    gap: 18px;
    padding: 20px;
    border-radius: 20px;
  }

  .slv2-subject-hero-main {
    align-items: flex-start;
  }

  .slv2-subject-hero-icon {
    width: 54px;
    height: 54px;
    border-radius: 17px;
  }

  .slv2-subject-next {
    align-items: stretch;
    flex-direction: column;
  }

  .slv2-subject-next .slv2-step-action {
    width: 100%;
  }

  .slv2-subject-modes {
    width: 100%;
  }

  .slv2-subject-modes button {
    min-width: 0;
    flex: 1;
    justify-content: center;
    padding: 0 7px;
  }

  .slv2-path-list {
    gap: 15px;
    padding-right: 0;
  }

  .slv2-path-step,
  .slv2-path-step:nth-child(n) {
    --slv2-step-shift: 0px;
    grid-template-columns: 48px minmax(0, 1fr);
    align-items: start;
    gap: 11px;
  }

  .slv2-path-list::before {
    left: 23px;
  }

  .slv2-path-node {
    width: 48px;
    height: 48px;
    border-width: 4px;
    border-radius: 15px;
  }

  .slv2-path-node .slv2-home-icon {
    width: 19px;
    height: 19px;
  }

  .slv2-path-card {
    min-height: 0;
    padding: 15px;
    border-radius: 17px;
  }

  .slv2-path-card::before {
    width: 12px;
  }

  .slv2-path-card-foot {
    align-items: stretch;
    flex-direction: column;
  }

  .slv2-step-action,
  .slv2-step-done {
    width: 100%;
  }

  .slv2-journey-empty {
    align-items: flex-start;
    flex-direction: column;
  }
}
}

@layer legacy {
/* Deep Learning routes: persisted chapters, durable lesson completion and guided quizzes. */
.slv2-path-status {
  min-height: 260px;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  padding: 34px;
  border: 1px solid var(--aios-border);
  border-radius: 24px;
  background: var(--aios-elevated);
}

.slv2-path-status-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  color: var(--slv2-subject, var(--aios-accent));
  border-radius: 20px;
  background: color-mix(in srgb, var(--slv2-subject, var(--aios-accent)) 12%, var(--aios-surface));
}

.slv2-path-status-icon .slv2-home-icon { width: 26px; height: 26px; }
.slv2-path-status h2 { margin: 5px 0 7px; font-size: clamp(22px, 3vw, 32px); }
.slv2-path-status p { max-width: 660px; margin: 0; color: var(--aios-text-muted); line-height: 1.55; }
.slv2-path-status > button { min-height: 44px; }

.slv2-path-loader {
  width: 34px;
  height: 34px;
  border: 3px solid var(--aios-border);
  border-top-color: var(--slv2-subject, var(--aios-accent));
  border-radius: 50%;
  animation: slv2-path-spin .8s linear infinite;
}

@keyframes slv2-path-spin { to { transform: rotate(360deg); } }

.slv2-chapters {
  display: grid;
  gap: 18px;
  margin-bottom: 22px;
}

.slv2-chapter-selector {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.slv2-chapter-selector > button {
  min-height: 148px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-content: start;
  gap: 12px;
  padding: 18px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 19px;
  background: var(--aios-elevated);
  text-align: left;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--aios-border) 75%, transparent);
}

.slv2-chapter-selector > button:hover,
.slv2-chapter-selector > button.active {
  border-color: var(--slv2-subject);
  background: color-mix(in srgb, var(--slv2-subject) 8%, var(--aios-elevated));
}

.slv2-chapter-selector > button.active { box-shadow: 0 4px 0 color-mix(in srgb, var(--slv2-subject) 55%, transparent); }
.slv2-chapter-index { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; border-radius: 14px; background: var(--slv2-subject); font-weight: 850; }
.slv2-chapter-index .slv2-home-icon { width: 20px; height: 20px; }
.slv2-chapter-selector > button > span:nth-child(2) { min-width: 0; display: grid; gap: 3px; }
.slv2-chapter-selector small,
.slv2-chapter-selector em { color: var(--aios-text-muted); font-size: 11px; font-style: normal; }
.slv2-chapter-selector strong { overflow: hidden; font-size: 15px; line-height: 1.25; text-overflow: ellipsis; }
.slv2-chapter-selector i { grid-column: 1 / -1; height: 6px; overflow: hidden; margin-top: 7px; border-radius: 99px; background: var(--aios-surface-hover); }
.slv2-chapter-selector i b { display: block; height: 100%; border-radius: inherit; background: var(--slv2-subject); }
.slv2-journey-empty-deep { margin-top: 14px; }

.slv2-lesson-page,
.slv2-success-page,
.slv2-exercise-page,
.slv2-quiz-result-page {
  --slv2-subject-soft: color-mix(in srgb, var(--slv2-subject) 10%, var(--aios-elevated));
  --slv2-subject-border: color-mix(in srgb, var(--slv2-subject) 34%, var(--aios-border));
}

.student-learning-v2-consolidated.slv2-lesson-page {
  width: min(100%, 1120px);
  overflow: clip;
}

.slv2-reader-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 26px;
  margin-bottom: 20px;
  padding: 18px 0 24px;
  border-bottom: 1px solid var(--aios-border);
}

.slv2-reader-head > button { min-height: 44px; }
.slv2-reader-title h1 { margin: 5px 0 5px; font-size: clamp(30px, 4.2vw, 52px); line-height: 1.03; letter-spacing: -.045em; }
.slv2-reader-title p { margin: 0; color: var(--aios-text-muted); font-size: 13px; }
.slv2-reader-meta { display: flex; align-items: center; gap: 8px; }
.slv2-reader-meta > span { min-height: 36px; display: inline-flex; align-items: center; gap: 7px; padding: 0 11px; color: var(--aios-text-muted); border: 1px solid var(--aios-border); border-radius: 12px; background: var(--aios-surface); font-size: 11px; font-weight: 750; }
.slv2-reader-meta .slv2-home-icon { width: 16px; height: 16px; color: var(--slv2-subject); }

.slv2-reader-progress {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 34%);
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
  padding: 15px 18px;
  border: 1px solid var(--slv2-subject-border);
  border-radius: 16px;
  background: var(--slv2-subject-soft);
}

.slv2-reader-progress > div:first-child { display: flex; justify-content: space-between; gap: 12px; }
.slv2-reader-progress span { color: var(--aios-text-muted); font-size: 12px; }
.slv2-reader-progress strong { font-size: 12px; }
.slv2-reader-progress > div:last-child { height: 8px; overflow: hidden; border-radius: 99px; background: color-mix(in srgb, var(--slv2-subject) 13%, var(--aios-surface-hover)); }
.slv2-reader-progress i { display: block; height: 100%; border-radius: inherit; background: var(--slv2-subject); }

.slv2-reader-layout { display: grid; grid-template-columns: minmax(0, 1fr); align-items: start; }
.slv2-reader-main,
.slv2-reader-assist,
.slv2-reader-assist details,
.slv2-reader-assist details > div,
.slv2-lesson-composer { min-width: 0; }
.slv2-lesson-objectives { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 16px; margin-bottom: 20px; padding: 20px; border: 1px solid var(--slv2-subject-border); border-radius: 18px; background: var(--slv2-subject-soft); }
.slv2-lesson-objectives > span { width: 48px; height: 48px; display: grid; place-items: center; color: var(--slv2-subject); border-radius: 15px; background: var(--aios-elevated); }
.slv2-lesson-objectives h2 { margin: 0 0 8px; font-size: 18px; }
.slv2-lesson-objectives ul { display: grid; gap: 5px; margin: 0; padding-left: 20px; color: var(--aios-text-muted); font-size: 13px; }
.slv2-reader-main .slv2-file-bar { max-width: none; margin: 0 0 18px; }
.slv2-reader-main .slv2-attachment { max-width: none; margin: 0 0 18px; }
.slv2-reader-main .slv2-lesson-reader { max-width: none; min-width: 0; min-height: 360px; margin: 0; padding: clamp(24px, 4vw, 44px); overflow-wrap: anywhere; border: 1px solid var(--aios-border); border-radius: 22px; background: var(--aios-elevated); box-shadow: 0 12px 30px color-mix(in srgb, var(--aios-text) 5%, transparent); font-size: clamp(16px, 1.7vw, 18px); }
.slv2-reader-main .slv2-lesson-reader > :first-child { margin-top: 0; }
.slv2-reader-main .slv2-lesson-reader p { max-width: 70ch; }
.slv2-reader-main .slv2-lesson-reader pre,
.slv2-reader-main .slv2-lesson-reader table { display: block; max-width: 100%; overflow-x: auto; }
.slv2-reader-main .slv2-lesson-reader img,
.slv2-reader-main .slv2-lesson-reader video,
.slv2-reader-main .slv2-lesson-reader iframe { max-width: 100%; }

.slv2-lesson-sections { display: grid; gap: 18px; }
.slv2-learning-block {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--aios-border);
}
.slv2-learning-block:last-child { padding-bottom: 0; border-bottom: 0; }
.slv2-learning-block-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--slv2-subject);
  border-radius: 15px;
  background: var(--slv2-subject-soft);
}
.slv2-learning-block-icon .slv2-home-icon { width: 22px; height: 22px; }
.slv2-learning-block h2 { margin: 4px 0 10px; font-size: clamp(20px, 2.2vw, 27px); line-height: 1.2; }
.slv2-learning-block-copy > :first-child { margin-top: 0; }
.slv2-learning-block-copy > :last-child { margin-bottom: 0; }
.slv2-learning-block.is-callout { padding: 20px; border: 1px solid var(--slv2-subject-border); border-radius: 18px; background: var(--slv2-subject-soft); }
.slv2-learning-block.is-callout:last-child { border-bottom: 1px solid var(--slv2-subject-border); }
.slv2-learning-block.is-example .slv2-learning-block-icon { color: #9b6416; background: color-mix(in srgb, #e4a53a 14%, var(--aios-elevated)); }
.slv2-learning-block.is-check .slv2-learning-block-icon { color: #1d7a56; background: color-mix(in srgb, #2f9e70 13%, var(--aios-elevated)); }

.slv2-lesson-checkpoint {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  color: var(--aios-text);
  border: 1px solid color-mix(in srgb, #2f9e70 32%, var(--aios-border));
  border-radius: 18px;
  background: color-mix(in srgb, #2f9e70 8%, var(--aios-elevated));
}
.slv2-lesson-checkpoint > span { width: 46px; height: 46px; display: grid; place-items: center; color: #1d7a56; border-radius: 15px; background: var(--aios-elevated); }
.slv2-lesson-checkpoint h2 { margin: 4px 0 6px; font-size: 20px; }
.slv2-lesson-checkpoint p { margin: 0; }

.slv2-associated-resources { display: grid; gap: 12px; padding-top: 4px; }
.slv2-associated-resources h2 { margin: 4px 0 0; font-size: 20px; }
.slv2-associated-resources ul { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.slv2-associated-resources li > a,
.slv2-associated-resources li > span {
  min-height: 58px;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--aios-text);
  border: 1px solid var(--aios-border);
  border-radius: 14px;
  background: var(--aios-surface);
  text-decoration: none;
}
.slv2-associated-resources li > span { grid-template-columns: 36px minmax(0, 1fr); color: var(--aios-text-muted); }
.slv2-associated-resources li > a:hover { border-color: var(--slv2-subject-border); background: var(--slv2-subject-soft); }
.slv2-associated-resources li > a > .slv2-home-icon:first-child,
.slv2-associated-resources li > span > .slv2-home-icon { width: 20px; height: 20px; color: var(--slv2-subject); }
.slv2-associated-resources li span span { min-width: 0; display: grid; gap: 2px; }
.slv2-associated-resources strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slv2-associated-resources small { color: var(--aios-text-muted); font-size: 11px; }

.slv2-reader-assist { position: sticky; top: 18px; }
.slv2-reader-assist .slv2-lesson-assistant { max-width: none; margin: 0; padding: 0; overflow: hidden; border: 1px solid var(--aios-border); border-radius: 18px; background: var(--aios-elevated); }
.slv2-reader-assist summary { min-height: 76px; display: grid; grid-template-columns: 48px minmax(0, 1fr) 20px; align-items: center; gap: 11px; padding: 13px; cursor: pointer; list-style: none; }
.slv2-reader-assist summary::-webkit-details-marker { display: none; }
.slv2-reader-assist summary > span:nth-child(2) { display: grid; gap: 3px; }
.slv2-reader-assist summary small { color: var(--aios-text-muted); font-size: 10px; line-height: 1.35; }
.slv2-aiko-mini { width: 48px; height: 48px; display: grid; place-items: center; overflow: hidden; background: transparent; }
.slv2-aiko-mini img { width: 44px; height: 44px; object-fit: contain; }
.slv2-reader-assist details[open] summary { border-bottom: 1px solid var(--aios-border); }
.slv2-reader-assist details[open] summary > .slv2-home-icon { transform: rotate(90deg); }
.slv2-reader-assist details > div { padding: 14px; }
.slv2-mini-chat { display: grid; gap: 12px; }
.slv2-mini-chat > header { display: flex; align-items: center; gap: 10px; }
.slv2-mini-chat > header > div { min-width: 0; display: grid; grid-template-columns: 8px auto; align-items: center; gap: 1px 7px; }
.slv2-mini-chat > header strong { font-size: 13px; }
.slv2-mini-chat > header small { grid-column: 2; overflow: hidden; color: var(--aios-text-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.slv2-mini-chat-presence { width: 8px; height: 8px; grid-row: 1 / span 2; border-radius: 50%; background: #2f9e70; box-shadow: 0 0 0 3px color-mix(in srgb, #2f9e70 14%, transparent); }
.slv2-mini-chat-messages {
  max-height: 286px;
  min-height: 116px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 12px;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  border: 1px solid var(--aios-border);
  border-radius: 16px;
  background: var(--aios-surface);
  scrollbar-width: thin;
}
.slv2-mini-chat-empty { min-height: 90px; display: grid; place-items: center; align-content: center; gap: 8px; color: var(--aios-text-muted); text-align: center; }
.slv2-mini-chat-empty > span { width: 34px; height: 34px; display: grid; place-items: center; color: var(--slv2-subject); border-radius: 12px; background: var(--slv2-subject-soft); }
.slv2-mini-chat-empty p { margin: 0; font-size: 11px; line-height: 1.45; }
.slv2-mini-message { min-width: 0; display: grid; grid-template-columns: 28px minmax(0, 1fr); align-items: start; gap: 8px; }
.slv2-mini-message.is-student { grid-template-columns: minmax(0, 1fr) 28px; }
.slv2-mini-message.is-student > .slv2-mini-message-avatar { grid-column: 2; }
.slv2-mini-message.is-student > div { grid-row: 1; justify-items: end; }
.slv2-mini-message-avatar { width: 28px; height: 28px; display: grid; place-items: center; overflow: hidden; color: #fff; border-radius: 10px; background: var(--slv2-subject); font-size: 11px; font-weight: 850; }
.slv2-mini-message-avatar:has(img) { background: transparent; border-radius: 0; }
.slv2-mini-message-avatar img { width: 28px; height: 28px; object-fit: contain; background: transparent; }
.slv2-mini-message.is-thinking .slv2-mini-message-avatar { width: 22px; height: 22px; border-radius: 11px; }
.slv2-mini-message.is-thinking .slv2-mini-message-avatar img { width: 22px; height: 22px; }
.slv2-mini-message > div { min-width: 0; display: grid; gap: 4px; }
.slv2-mini-message > div > strong { color: var(--aios-text-muted); font-size: 9px; }
.slv2-mini-message-copy { min-width: 0; max-width: 100%; padding: 9px 10px; overflow-wrap: anywhere; border: 1px solid var(--aios-border); border-radius: 4px 13px 13px 13px; background: var(--aios-elevated); font-size: 11px; line-height: 1.45; }
.slv2-mini-message.is-student .slv2-mini-message-copy { color: #fff; border-color: var(--slv2-subject); border-radius: 13px 4px 13px 13px; background: var(--slv2-subject); }
.slv2-mini-message.is-error .slv2-mini-message-copy { color: #8b2d22; border-color: color-mix(in srgb, #c24132 40%, var(--aios-border)); background: color-mix(in srgb, #c24132 8%, var(--aios-elevated)); }
.slv2-mini-message-copy > :first-child { margin-top: 0; }
.slv2-mini-message-copy > :last-child { margin-bottom: 0; }
.slv2-mini-message-copy p { margin: 0 0 7px; }
.slv2-mini-typing { min-height: 18px; display: inline-flex; align-items: center; gap: 4px; }
.slv2-mini-typing i { width: 5px; height: 5px; border-radius: 50%; background: var(--slv2-subject); animation: slv2-mini-type 1s ease-in-out infinite; }
.slv2-mini-typing i:nth-child(2) { animation-delay: 120ms; }
.slv2-mini-typing i:nth-child(3) { animation-delay: 240ms; }
@keyframes slv2-mini-type { 0%, 70%, 100% { opacity: .35; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }
.slv2-reader-assist .slv2-lesson-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin: 0 0 12px; }
.slv2-reader-assist .slv2-lesson-actions button { min-height: 44px; padding: 8px; font-size: 10px; }
.slv2-reader-assist .slv2-lesson-composer { display: grid; grid-template-columns: minmax(0, 1fr) 44px; align-items: end; gap: 4px; padding: 5px; border: 1px solid var(--aios-border); border-radius: 17px; background: var(--aios-surface); }
.slv2-reader-assist textarea { width: 100%; min-width: 0; min-height: 44px; max-height: 132px; padding: 9px 7px; resize: none; overflow-wrap: normal; word-break: normal; border: 0; background: transparent; box-shadow: none; }
.student-learning-v2 .slv2-reader-assist .slv2-lesson-composer .slv2-mini-send.primary { width: 44px; min-width: 44px; height: 44px; min-height: 44px; display: grid; place-items: center; align-self: end; padding: 0; border-radius: 50% !important; }
.slv2-reader-assist .slv2-mini-send .slv2-home-icon { width: 19px; height: 19px; }

.slv2-lesson-completion { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; align-items: center; gap: 17px; margin-top: 20px; padding: 22px; border: 1px solid var(--slv2-subject-border); border-radius: 20px; background: var(--slv2-subject-soft); }
.slv2-completion-icon { width: 56px; height: 56px; display: grid; place-items: center; color: #fff; border-radius: 18px; background: var(--slv2-subject); box-shadow: 0 4px 0 color-mix(in srgb, var(--slv2-subject) 68%, #14213b); }
.slv2-completion-icon .slv2-home-icon { width: 24px; height: 24px; }
.slv2-lesson-completion h2 { margin: 4px 0 5px; font-size: 20px; }
.slv2-lesson-completion p { margin: 0; color: var(--aios-text-muted); font-size: 12px; line-height: 1.5; }
.slv2-lesson-completion > button { min-height: 48px; }
.slv2-completion-error { margin-top: 10px; padding: 10px 12px; color: #8b2d22; border: 1px solid color-mix(in srgb, #c24132 40%, var(--aios-border)); border-radius: 12px; background: color-mix(in srgb, #c24132 8%, var(--aios-elevated)); }
.slv2-completion-error p { color: inherit; }

.slv2-lesson-nav { max-width: none; margin-top: 22px; }
.slv2-lesson-nav button,
.slv2-lesson-nav-disabled { min-height: 86px; display: grid; gap: 5px; padding: 16px; border: 1px solid var(--aios-border); border-radius: 16px; background: var(--aios-elevated); }
.slv2-lesson-nav-disabled { color: var(--aios-text-muted); }
.slv2-lesson-nav-disabled em { display: flex; align-items: center; gap: 5px; font-size: 11px; font-style: normal; }
.slv2-lesson-nav-disabled .slv2-home-icon { width: 14px; height: 14px; }

.slv2-success-card { min-height: 510px; display: grid; grid-template-columns: 96px minmax(0, 1fr); align-content: center; gap: 22px 28px; padding: clamp(28px, 5vw, 64px); border: 1px solid var(--slv2-subject-border); border-radius: 28px; background: var(--slv2-subject-soft); }
.slv2-success-badge { width: 96px; height: 96px; display: grid; place-items: center; grid-row: span 2; color: #fff; border: 8px solid var(--aios-elevated); border-radius: 30px; background: var(--slv2-subject); box-shadow: 0 7px 0 color-mix(in srgb, var(--slv2-subject) 68%, #14213b); }
.slv2-success-badge .slv2-home-icon { width: 42px; height: 42px; }
.slv2-success-card h2 { max-width: 720px; margin: 6px 0 8px; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.035em; }
.slv2-success-card p { margin: 0; color: var(--aios-text-muted); }
.slv2-success-progress { grid-column: 2; display: grid; grid-template-columns: auto 1fr; align-items: baseline; gap: 3px 10px; max-width: 520px; }
.slv2-success-progress > strong { font-size: 32px; }
.slv2-success-progress > span { color: var(--aios-text-muted); font-size: 12px; }
.slv2-success-progress > div { grid-column: 1 / -1; height: 10px; overflow: hidden; border-radius: 99px; background: var(--aios-surface-hover); }
.slv2-success-progress i { display: block; height: 100%; border-radius: inherit; background: var(--slv2-subject); }
.slv2-success-actions { grid-column: 2; display: flex; flex-wrap: wrap; gap: 10px; }
.slv2-success-actions button { min-height: 48px; }

.slv2-exercise-page { max-width: 960px; }
.slv2-exercise-progress { height: 8px; margin-bottom: 15px; background: color-mix(in srgb, var(--slv2-subject) 12%, var(--aios-surface)); }
.slv2-exercise-progress i { background: var(--slv2-subject); }
.slv2-quiz-steps { display: flex; justify-content: center; gap: 8px; margin-bottom: 22px; }
.slv2-quiz-steps > span { width: 34px; height: 34px; display: grid; place-items: center; color: var(--aios-text-muted); border: 1px solid var(--aios-border); border-radius: 11px; background: var(--aios-elevated); font-size: 11px; font-weight: 800; }
.slv2-quiz-steps > span.active { color: #fff; border-color: var(--slv2-subject); background: var(--slv2-subject); box-shadow: 0 3px 0 color-mix(in srgb, var(--slv2-subject) 68%, #14213b); }
.slv2-quiz-steps > span.done { color: #166443; border-color: color-mix(in srgb, #21835d 35%, var(--aios-border)); background: color-mix(in srgb, #21835d 10%, var(--aios-elevated)); }
.slv2-quiz-steps .slv2-home-icon { width: 15px; height: 15px; }
.slv2-question-card { padding: clamp(24px, 4vw, 42px); border-radius: 24px; box-shadow: 0 12px 30px color-mix(in srgb, var(--aios-text) 5%, transparent); }
.slv2-question-card > small { display: block; margin: -16px 0 20px; color: var(--aios-text-muted); }
.slv2-choice-list button { min-height: 64px; border-radius: 15px; }
.slv2-choice-list button.selected { border: 2px solid var(--slv2-subject); background: color-mix(in srgb, var(--slv2-subject) 9%, var(--aios-elevated)); }
.slv2-choice-list button.selected b { color: #fff; border-color: var(--slv2-subject); background: var(--slv2-subject); }
.slv2-feedback { border-radius: 15px; }
.slv2-feedback strong { display: block; margin-bottom: 4px; }
.slv2-feedback p { margin: 0; }
.slv2-answer-explanation { margin-top: 8px !important; padding-top: 8px; border-top: 1px solid currentColor; opacity: .82; }
.slv2-question-actions button,
.slv2-exercise-footer button { min-height: 48px; }
.slv2-quiz-save-status { max-width: 760px; display: grid; gap: 3px; margin: 16px auto 0; padding: 13px 16px; border: 1px solid var(--slv2-subject-border); border-radius: 14px; background: var(--slv2-subject-soft); }
.slv2-quiz-save-status p { margin: 0; color: var(--aios-text-muted); font-size: 12px; }
.slv2-quiz-save-status.is-error { color: #8b2d22; border-color: color-mix(in srgb, #c24132 40%, var(--aios-border)); background: color-mix(in srgb, #c24132 8%, var(--aios-elevated)); }
.slv2-quiz-save-status.is-error p { color: inherit; }

.slv2-result-deep { min-height: 350px; grid-template-columns: 88px auto minmax(0, 1fr); place-items: center start; gap: 24px; max-width: none; padding: 34px; border: 1px solid var(--slv2-subject-border); border-radius: 24px; background: var(--slv2-subject-soft); text-align: left; }
.slv2-result-icon { width: 88px; height: 88px; display: grid; place-items: center; color: #fff; border-radius: 28px; background: var(--slv2-subject); }
.slv2-result-icon .slv2-home-icon { width: 38px; height: 38px; }
.slv2-result-score { display: grid; justify-items: center; }
.slv2-result-score > span,
.slv2-result-score > em { color: var(--aios-text-muted); font-size: 11px; font-style: normal; }
.slv2-result-score strong { font-size: clamp(46px, 7vw, 72px); letter-spacing: -.06em; }
.slv2-result-copy h2 { margin: 0 0 7px; font-size: clamp(24px, 3vw, 34px); }
.slv2-result-copy p { max-width: 520px; }
.slv2-result-copy > span { display: inline-flex; margin-top: 11px; padding: 6px 9px; color: var(--slv2-subject); border-radius: 9px; background: var(--aios-elevated); font-size: 11px; font-weight: 800; }
.slv2-result-deep .slv2-success-actions { grid-column: 2 / -1; }
.slv2-quiz-review { display: grid; gap: 16px; margin-top: 22px; }
.slv2-quiz-review .slv2-section-head > span {
  min-width: 34px;
  min-height: 34px;
  display: inline-grid;
  place-items: center;
  align-self: center;
  padding-inline: 10px;
  border: 1px solid var(--aios-border);
  border-radius: 999px;
  color: var(--aios-text-muted);
  background: var(--aios-elevated);
  font-size: 12px;
  font-weight: 800;
}
.slv2-review-answers { display: grid; gap: 10px; }
.slv2-review-answers details { overflow: hidden; border: 1px solid var(--aios-border); border-radius: 16px; background: var(--aios-elevated); }
.slv2-review-answers summary { min-height: 58px; display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 10px; padding: 12px 16px; cursor: pointer; list-style: none; }
.slv2-review-answers summary::-webkit-details-marker { display: none; }
.slv2-review-answers summary .slv2-home-icon { width: 18px; height: 18px; }
.slv2-review-answers .is-correct summary { color: #166443; }
.slv2-review-answers .is-error summary { color: #8b4b11; }
.slv2-review-answers summary em { font-size: 11px; font-style: normal; }
.slv2-review-answers details > div { padding: 0 16px 16px 54px; color: var(--aios-text); }
.slv2-review-answers dl { display: grid; gap: 8px; }
.slv2-review-answers dl > div { display: grid; grid-template-columns: 130px 1fr; gap: 10px; }
.slv2-review-answers dt { color: var(--aios-text-muted); font-size: 11px; }
.slv2-review-answers dd { margin: 0; }

html[data-theme="dark"] .slv2-completion-error { color: #ffaaa0; }
html[data-theme="dark"] .slv2-quiz-save-status.is-error { color: #ffaaa0; }
html[data-theme="dark"] .slv2-mini-message.is-error .slv2-mini-message-copy { color: #ffaaa0; }
html[data-theme="dark"] .slv2-quiz-steps > span.done,
html[data-theme="dark"] .slv2-review-answers .is-correct summary { color: #82dcb6; }
html[data-theme="dark"] .slv2-review-answers .is-error summary { color: #ffc27f; }

@media (max-width: 1080px) {
  .slv2-chapter-selector { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slv2-reader-layout { grid-template-columns: 1fr; }
  .slv2-reader-assist { position: static; }
  .slv2-reader-assist summary { grid-template-columns: 48px minmax(0, 1fr) 20px; }
  .slv2-reader-assist .slv2-lesson-actions { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .slv2-mini-chat-messages { max-height: 250px; }
}

@media (max-width: 760px) {
  .slv2-path-status { grid-template-columns: 52px minmax(0, 1fr); padding: 24px; }
  .slv2-path-status-icon { width: 52px; height: 52px; border-radius: 16px; }
  .slv2-path-status > button,
  .slv2-path-loader { grid-column: 2; }
  .slv2-reader-head { grid-template-columns: 1fr; gap: 14px; }
  .slv2-reader-head > button { width: 100%; justify-content: center; }
  .slv2-reader-meta { flex-wrap: wrap; }
  .slv2-reader-progress { grid-template-columns: 1fr; }
  .slv2-lesson-completion { grid-template-columns: 52px minmax(0, 1fr); }
  .slv2-lesson-completion > button { grid-column: 1 / -1; width: 100%; }
  .slv2-success-card { grid-template-columns: 70px minmax(0, 1fr); }
  .slv2-success-badge { width: 70px; height: 70px; grid-row: auto; border-width: 5px; border-radius: 22px; }
  .slv2-success-badge .slv2-home-icon { width: 30px; height: 30px; }
  .slv2-success-progress,
  .slv2-success-actions { grid-column: 1 / -1; }
  .slv2-result-deep { grid-template-columns: 72px minmax(0, 1fr); align-items: center; }
  .slv2-result-icon { width: 72px; height: 72px; border-radius: 23px; }
  .slv2-result-copy,
  .slv2-result-deep .slv2-success-actions { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .slv2-chapter-selector { grid-template-columns: 1fr; }
  .slv2-chapter-selector > button { min-height: 128px; }
  .slv2-reader-main .slv2-lesson-reader { min-height: 280px; padding: 22px; border-radius: 18px; }
  .slv2-lesson-objectives { grid-template-columns: 1fr; }
  .slv2-reader-assist .slv2-lesson-actions { grid-template-columns: 1fr 1fr; }
  .slv2-mini-chat > header { align-items: stretch; flex-direction: column; }
  .slv2-learning-block,
  .slv2-lesson-checkpoint { grid-template-columns: 1fr; }
  .slv2-learning-block.is-callout { padding: 18px; }
  .slv2-associated-resources strong { white-space: normal; }
  .slv2-lesson-completion { grid-template-columns: 1fr; }
  .slv2-completion-icon { width: 52px; height: 52px; }
  .slv2-success-card { min-height: 430px; grid-template-columns: 1fr; padding: 24px; }
  .slv2-success-badge { grid-row: auto; }
  .slv2-success-card h2 { font-size: 28px; }
  .slv2-result-deep { grid-template-columns: 1fr; justify-items: start; padding: 24px; }
  .slv2-result-score { justify-items: start; }
  .slv2-result-deep .slv2-success-actions { grid-column: 1; width: 100%; }
  .slv2-success-actions { width: 100%; flex-direction: column; }
  .slv2-success-actions button { width: 100%; }
  .slv2-review-answers details > div { padding-left: 16px; }
  .slv2-review-answers dl > div { grid-template-columns: 1fr; gap: 3px; }
  .slv2-question-actions,
  .slv2-exercise-footer { align-items: stretch; flex-direction: column; }
  .slv2-question-actions button,
  .slv2-exercise-footer button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .slv2-path-loader { animation: none; border-top-color: var(--aios-border); }
  .slv2-reader-assist details[open] summary > .slv2-home-icon { transform: none; }
}
.student-learning-v2.slv2-subject-journey,
.student-learning-v2.slv2-lesson-page {
  --slv2-subject: var(--aios-accent-strong);
  --slv2-subject-deep: var(--aios-accent-strong);
  /* Flattened against the elevated surface like every other subject tint: the
     translucent accent token let the page background show through, so the
     hero title sat on an unknown backdrop and its contrast was unverifiable. */
  --slv2-subject-soft: color-mix(in srgb, var(--aios-accent-strong) 10%, var(--aios-elevated));
  --slv2-subject-border: var(--aios-border);
}
.student-learning-v2.slv2-subject-journey .primary,
.student-learning-v2.slv2-subject-journey .slv2-step-action:not(:disabled),
.student-learning-v2.slv2-lesson-page .primary {
  --aios-button-face: var(--aios-accent-strong);
  --aios-button-ink: var(--aios-on-accent, var(--aios-bg));
  background: var(--aios-accent-strong); color: var(--aios-on-accent, var(--aios-bg));
  --aios-button-edge: transparent;
  box-shadow: none;
}
.student-learning-v2.slv2-subject-journey .slv2-path-node {
  box-shadow: none; border-radius: 16px;
}

/* The layer statement in aios-layers.css registers `aios` at its first
   mention (aios.tactile), so every aios.* sublayer resolves BEFORE `legacy`.
   The 48px target declared for this button in @layer aios.components is
   therefore beaten by the generic `.primary { min-height: 40px }` in
   styles.css, and the call to action measured 43px. Restate the touch target
   here, inside `legacy` and after styles.css in document order. */
.slv2-next-step > .primary {
  min-height: 48px;
}
}