/*
 AIForSRE v20.3 — Mobile responsive hotfix
 Loaded last so it can safely override earlier desktop/balanced-layout patches.
 Desktop behavior is intentionally untouched.
*/

@media (max-width: 900px) {
  html, body {
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
  }

  body {
    min-width: 0 !important;
  }

  img, svg, video, canvas {
    max-width: 100% !important;
  }

  /* Header / navigation ------------------------------------------------ */
  .site-header {
    width: 100% !important;
    padding-left: 14px !important;
    padding-right: 14px !important;
    gap: 10px !important;
  }

  .brand {
    flex: 0 0 auto !important;
    min-width: 0 !important;
  }

  .header-actions,
  .site-nav,
  .main-nav,
  .nav-links,
  .header-nav {
    min-width: 0 !important;
    max-width: calc(100vw - 68px) !important;
  }

  .header-actions {
    overflow-x: auto !important;
    overflow-y: hidden !important;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap !important;
  }

  .header-actions::-webkit-scrollbar {
    display: none;
  }

  .header-actions > *,
  .site-nav > *,
  .main-nav > *,
  .nav-links > *,
  .header-nav > * {
    flex: 0 0 auto !important;
  }

  /* Core lesson -------------------------------------------------------- */
  .lesson,
  .lesson-shell,
  .lesson-grid,
  .copy,
  .visual,
  #course {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    height: auto !important;
    max-height: none !important;
  }

  .lesson {
    min-height: 0 !important;
    align-items: flex-start !important;
    padding:
      calc(var(--header, 58px) + 24px)
      16px
      38px !important;
  }

  .lesson-shell {
    margin: 0 auto !important;
  }

  .lesson-shell > .lesson-grid,
  .lesson-grid {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 22px !important;
    align-items: start !important;
  }

  .lesson-grid > *,
  .copy,
  .visual {
    grid-column: 1 / -1 !important;
    min-width: 0 !important;
  }

  .visual {
    position: static !important;
    top: auto !important;
    display: grid !important;
    gap: 12px !important;
  }

  /* Long concept names must never push the layout wider than viewport. */
  .lesson h1,
  .copy h1 {
    width: 100% !important;
    max-width: 100% !important;
    margin-right: 0 !important;
    font-size: clamp(42px, 12vw, 70px) !important;
    line-height: .96 !important;
    letter-spacing: -.045em !important;
    overflow-wrap: anywhere !important;
    word-break: normal !important;
    hyphens: auto;
    text-wrap: balance;
  }

  .lesson:first-child h1 {
    font-size: clamp(54px, 17vw, 90px) !important;
  }

  .definition {
    max-width: 100% !important;
    font-size: clamp(18px, 5vw, 22px) !important;
    line-height: 1.42 !important;
  }

  .phase-line {
    width: 100% !important;
    min-width: 0 !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
  }

  .phase-subtitle {
    min-width: 0 !important;
    max-width: 100% !important;
  }

  /* Cards -------------------------------------------------------------- */
  .micro-grid {
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 10px !important;
  }

  .micro-card,
  .micro-card.sre,
  .remember,
  .detail,
  .related,
  .lesson-tools,
  .finish {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    grid-column: 1 / -1 !important;
  }

  .micro-card p,
  .remember,
  .detail,
  .related {
    overflow-wrap: anywhere;
  }

  .visual-card {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    padding: 14px !important;
    overflow: hidden !important;
  }

  .concept-map,
  .concept-node,
  .lp-model,
  .lp-node {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .concept-node,
  .lp-node {
    overflow-wrap: anywhere !important;
  }

  /* Built-in diagrams / ASCII fallback -------------------------------- */
  .picture {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    padding: 12px !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    -webkit-overflow-scrolling: touch;
  }

  .picture > svg,
  .picture > img {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    object-fit: contain !important;
  }

  .picture pre {
    font-size: 11px !important;
    line-height: 1.45 !important;
  }

  /* Generated visual explainers --------------------------------------- */
  .aiforsre-featured-visual {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    margin: 20px 0 6px !important;
    padding: 0 !important;
  }

  .aiforsre-featured-visual__head {
    width: 100% !important;
    min-width: 0 !important;
    gap: 8px !important;
    margin: 0 0 9px !important;
  }

  .aiforsre-featured-visual__frame {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    aspect-ratio: auto !important;
    height: auto !important;
    max-height: none !important;
    overflow: hidden !important;
    border-radius: 15px !important;
  }

  .aiforsre-featured-visual__frame img,
  .aiforsre-featured-visual img,
  .aiforsre-featured-visual__frame svg,
  .aiforsre-featured-visual svg {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: none !important;
    object-fit: contain !important;
  }

  /* Lower lesson area -------------------------------------------------- */
  .aiforsre-lesson-lower {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    gap: 10px !important;
  }

  /* Pager must fit one-column mobile screen. */
  .lesson-pager,
  .lesson-shell > .lesson-pager.aiforsre-pager-at-end {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    gap: 10px !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .lesson-pager .pager-link,
  .lesson-pager .next,
  .next {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    text-align: left !important;
  }

  .lesson-pager .pager-link span,
  .lesson-pager .next span,
  .next span {
    min-width: 0 !important;
    max-width: 100% !important;
    white-space: normal !important;
    overflow: visible !important;
    text-overflow: clip !important;
    overflow-wrap: anywhere !important;
  }

  /* Enterprise / Guides / Labs / Search / Progress -------------------- */
  .enterprise-course,
  .enterprise-shell,
  .enterprise-grid,
  .enterprise-hero,
  .guide-shell,
  .guide-grid,
  .labs-shell,
  .lab-shell,
  .search-page,
  .search-shell,
  .progress-page,
  .progress-shell,
  main {
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .enterprise-grid,
  .guide-grid,
  .labs-grid,
  .lab-grid,
  .progress-grid,
  .search-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .enterprise-stats {
    gap: 8px !important;
  }

  .enterprise-stats span {
    max-width: 100% !important;
  }

  /* Tables must scroll instead of expanding the entire page. */
  table {
    max-width: 100% !important;
  }

  .table-wrap,
  .responsive-table,
  .enterprise-course table,
  .guide-shell table,
  .lab-shell table {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
  }

  /* Form controls */
  input,
  textarea,
  select,
  button {
    max-width: 100% !important;
  }
}

@media (max-width: 560px) {
  :root {
    --header: 58px;
  }

  .site-header {
    height: var(--header) !important;
    padding-left: 10px !important;
    padding-right: 10px !important;
  }

  .brand-mark {
    width: 30px !important;
    height: 30px !important;
  }

  .brand > span:last-child {
    display: none !important;
  }

  .header-actions {
    gap: 6px !important;
  }

  .header-actions .progress,
  .header-actions .ghost-btn,
  .header-actions a {
    font-size: 10px !important;
    padding: 6px 8px !important;
  }

  .ghost-btn span {
    display: none !important;
  }

  .lesson {
    padding-left: 12px !important;
    padding-right: 12px !important;
    padding-bottom: 32px !important;
  }

  .lesson h1,
  .copy h1 {
    font-size: clamp(38px, 12.5vw, 58px) !important;
    letter-spacing: -.04em !important;
  }

  .lesson:first-child h1 {
    font-size: clamp(50px, 18vw, 82px) !important;
  }

  .definition {
    font-size: 18px !important;
  }

  .visual-card {
    padding: 11px !important;
    border-radius: 16px !important;
  }

  .picture {
    padding: 9px !important;
    border-radius: 13px !important;
  }

  .aiforsre-featured-visual__label {
    font-size: 9px !important;
  }

  .aiforsre-featured-visual__open {
    font-size: 10px !important;
    padding: 6px 9px !important;
  }

  .lesson-pager .pager-link,
  .lesson-pager .next,
  .next {
    min-height: 70px !important;
    padding: 12px !important;
  }

  .lesson-pager .pager-link span,
  .lesson-pager .next span,
  .next span {
    font-size: 15px !important;
  }

  .lesson-pager .pager-arrow,
  .lesson-pager .next-arrow,
  .next-arrow {
    flex-basis: 36px !important;
    width: 36px !important;
    height: 36px !important;
  }
}

/* Phones in landscape */
@media (max-width: 900px) and (orientation: landscape) {
  .lesson {
    padding-top: calc(var(--header, 58px) + 16px) !important;
  }

  .lesson h1,
  .copy h1 {
    font-size: clamp(36px, 8vw, 58px) !important;
  }
}