/* Mobile reading overrides. Loaded after the print-oriented handbook theme so
   page-specific desktop !important rules cannot squeeze the responsive flow. */
@media screen and (max-width: 900px) {
  .book {
    width: 100%;
    padding: 0;
  }

  .page {
    box-sizing: border-box;
    width: 100%;
    height: auto;
    min-height: 0;
    max-height: none;
    margin: 0 auto 14px;
    padding: clamp(22px, 5vw, 34px) clamp(16px, 5vw, 24px) 24px;
    overflow: visible;
  }

  .page > * {
    max-width: 100%;
  }

  .page img,
  .page svg {
    max-width: 100%;
  }

  .page-header {
    flex-wrap: wrap;
    gap: 4px 12px;
  }

  .page:not(.cover):not(#back-cover) .page-title {
    font-size: clamp(21px, 4vw, 27px);
    line-height: 1.3;
  }

  .page:not(.cover):not(#back-cover) .lead {
    max-width: none;
    font-size: clamp(12px, 1.7vw, 14px);
    line-height: 1.65;
  }

  .page:not(.cover):not(#back-cover) .panel p,
  .page:not(.cover):not(#back-cover) .feature p,
  .page:not(.cover):not(#back-cover) .list li,
  .page:not(.cover):not(#back-cover) .note {
    font-size: clamp(11.5px, 1.55vw, 13px);
    line-height: 1.55;
  }

  .page-footer {
    position: static !important;
    inset: auto !important;
    width: 100%;
    margin-top: 16px;
    padding-top: 8px;
  }

  .split-visual {
    grid-template-columns: minmax(0, 1fr) !important;
    min-height: 0 !important;
    height: auto !important;
    gap: 12px !important;
  }

  .split-visual > .panel {
    box-sizing: border-box;
    min-width: 0;
    min-height: 0 !important;
    max-height: none !important;
    height: auto !important;
  }

  .layer {
    box-sizing: border-box;
    grid-template-columns: 32px minmax(0, 1fr) !important;
    min-height: 0 !important;
    overflow: visible !important;
  }

  .layer-tags {
    grid-column: 2 !important;
  }

  .layer-tags span {
    max-width: 100%;
    white-space: normal;
    overflow-wrap: anywhere;
    font-size: 10px;
    line-height: 1.35;
  }

  .table-wrap,
  .matrix,
  .schedule-grid {
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }

  .data-table,
  .ui-table {
    min-width: 480px;
  }

  #kitting .panel:has(> .data-table),
  #outsourcing .panel:has(> .data-table) {
    min-width: 0;
    max-width: 100%;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }
}

@media screen and (max-width: 560px) {
  .page {
    margin-bottom: 12px;
    padding: 22px 16px 20px;
  }

  .cover-kicker {
    max-width: 100%;
    font-size: clamp(8px, 2.1vw, 9px);
    line-height: 1.5;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .page:not(.cover):not(#back-cover) .page-title {
    font-size: 22px;
  }

  .product-rail,
  .ai-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .product-rail .product {
    min-height: 0;
  }

  #architecture .split-visual,
  #kitting .split-visual,
  #quality .split-visual,
  #cable-prototype .split-visual,
  #outsourcing .split-visual,
  #oil-drum .split-visual,
  #knowledge .split-visual {
    grid-template-columns: minmax(0, 1fr) !important;
    min-height: 0 !important;
    height: auto !important;
  }

  #architecture .split-visual > .panel,
  #kitting .split-visual > .panel,
  #quality .split-visual > .panel,
  #cable-prototype .split-visual > .panel,
  #outsourcing .split-visual > .panel,
  #oil-drum .split-visual > .panel,
  #knowledge .split-visual > .panel {
    min-width: 0 !important;
    min-height: 0 !important;
    max-height: none !important;
    height: auto !important;
    justify-content: flex-start !important;
    gap: 12px !important;
  }

  #architecture .flow-row,
  #kitting .flow-row,
  #equipment .flow-row,
  #outsourcing .flow-row,
  #config .flow-row {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    align-items: stretch;
    gap: 8px !important;
  }

  #architecture .flow-node,
  #kitting .flow-row > *,
  #equipment .flow-row > *,
  #outsourcing .flow-row > *,
  #config .flow-row > * {
    box-sizing: border-box;
    width: auto;
    min-width: 0;
    min-height: 0 !important;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  #architecture .architecture-rule-list,
  #architecture .app-event-strip,
  #architecture .architecture-acceptance-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  #architecture .architecture-rule-list > div,
  #architecture .app-event-strip > div,
  #architecture .architecture-acceptance-grid > div {
    box-sizing: border-box;
    min-width: 0;
    min-height: 0 !important;
  }

  #architecture .architecture-rule-list b,
  #architecture .architecture-acceptance-grid b {
    font-size: 12px !important;
    line-height: 1.4 !important;
  }

  #architecture .architecture-rule-list span,
  #architecture .architecture-acceptance-grid span,
  #architecture .architecture-acceptance-grid small,
  #architecture .app-event-strip small {
    font-size: 11px !important;
    line-height: 1.5 !important;
  }

  :is(#architecture, #capability) .object-chain {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    justify-items: stretch;
    gap: 5px !important;
    overflow: visible;
  }

  :is(#architecture, #capability) .object-chain .node {
    box-sizing: border-box;
    width: 100%;
    min-width: 0 !important;
    min-height: 42px !important;
    padding: 8px 10px !important;
    font-size: 12px !important;
    line-height: 1.45 !important;
    word-break: normal !important;
    writing-mode: horizontal-tb !important;
    overflow-wrap: anywhere;
  }

  :is(#architecture, #capability) .object-chain .arrow {
    display: block;
    justify-self: center;
    transform: rotate(90deg);
    line-height: 1;
  }

  .table-wrap,
  .matrix,
  .schedule-grid {
    scrollbar-width: thin;
  }
}

/* Mobile typography and cover flow. These overrides intentionally stay below
   900px so the A4 desktop and print compositions remain unchanged. */
@media screen and (max-width: 900px) {
  .screen-toolbar {
    box-sizing: border-box;
    width: 100%;
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 4px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .screen-toolbar::-webkit-scrollbar {
    display: none;
  }

  .screen-toolbar a,
  .screen-toolbar button {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 8px 9px;
    white-space: nowrap;
  }

  .page:not(.cover):not(#back-cover) {
    box-sizing: border-box;
    min-width: 0;
    padding: clamp(16px, 4vw, 24px) clamp(16px, 5vw, 24px) 20px !important;
    gap: 8px !important;
  }

  .page > * {
    box-sizing: border-box;
    min-width: 0;
  }

  .page-header {
    position: static !important;
    inset: auto !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr);
    align-items: start !important;
    justify-content: start !important;
    gap: 4px;
    width: 100%;
    height: auto !important;
    margin: 0 0 8px;
    padding: 0 0 9px !important;
    border-bottom-width: 1px !important;
    z-index: auto !important;
  }

  .page-header span:first-child {
    display: flex !important;
    min-width: 0;
    align-items: flex-start !important;
    gap: 7px !important;
    font-size: 10px !important;
    line-height: 1.45 !important;
    letter-spacing: 0.025em !important;
    overflow-wrap: anywhere;
  }

  .page-header span:first-child::before {
    flex: 0 0 5px;
    margin-top: 5px;
  }

  .page-header span:last-child {
    display: block;
    min-width: 0;
    font-size: 9px !important;
    line-height: 1.45 !important;
    letter-spacing: 0.025em !important;
    overflow-wrap: anywhere;
  }

  .page:not(.cover):not(#back-cover) .page-title {
    max-width: 100%;
    overflow-wrap: anywhere;
    text-wrap: pretty;
  }

  .page-footer {
    box-sizing: border-box;
    position: static !important;
    inset: auto !important;
    width: 100%;
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-top: 12px;
    margin-bottom: 0;
    padding-top: 8px;
    line-height: 1.4;
  }

  #cover.cover,
  #back-cover.back-cover {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    width: 100%;
    height: auto !important;
    min-height: 0 !important;
    max-height: none !important;
    padding: clamp(24px, 6vw, 36px) clamp(16px, 6vw, 28px) 22px !important;
    overflow: hidden;
  }

  #cover .cover-brand,
  #back-cover .cover-brand {
    align-self: flex-start;
    max-width: 100%;
  }

  #cover .cover-kicker {
    box-sizing: border-box;
    width: 100%;
    margin: clamp(28px, 7vw, 42px) 0 9px !important;
    font-size: 9px !important;
    line-height: 1.5 !important;
    letter-spacing: 0.12em !important;
    white-space: normal !important;
    overflow-wrap: anywhere;
  }

  #cover h1 {
    max-width: 100% !important;
    margin: 7px 0 10px !important;
    font-size: clamp(31px, 8.6vw, 40px) !important;
    line-height: 1.28 !important;
    letter-spacing: 0.01em !important;
    overflow-wrap: anywhere;
  }

  #cover h1 em {
    display: inline !important;
    margin-top: 0 !important;
    letter-spacing: inherit !important;
  }

  #cover .cover-subtitle {
    max-width: 100%;
    font-size: 14px !important;
    line-height: 1.6 !important;
    overflow-wrap: anywhere;
  }

  #cover .cover-line {
    margin: 16px 0 12px !important;
  }

  #cover .cover-manifesto {
    max-width: 100% !important;
    margin: 0;
    font-size: 12px !important;
    line-height: 1.75 !important;
    text-align: left !important;
    overflow-wrap: anywhere;
  }

  #cover .cover-meta {
    position: static !important;
    inset: auto !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    width: 100%;
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid rgba(148, 163, 184, 0.24);
    font-size: 10px !important;
    line-height: 1.55 !important;
  }

  #cover .cover-meta > div,
  #cover .cover-note {
    max-width: 100% !important;
    text-align: left !important;
    overflow-wrap: anywhere;
  }

  #cover .cover-meta strong {
    display: block;
    margin-bottom: 2px !important;
  }

  #cover .page-footer {
    margin-top: 16px;
    font-size: 8px !important;
  }

  #back-cover .back-cover-content {
    width: 100%;
    max-width: 100%;
    margin: clamp(24px, 6vw, 40px) 0 16px !important;
  }

  #back-cover .back-cover-content h2 {
    max-width: 100%;
    font-size: clamp(28px, 7.6vw, 32px) !important;
    line-height: 1.3 !important;
    overflow-wrap: anywhere;
  }

  #back-cover .back-cover-content > p {
    font-size: 12px !important;
    line-height: 1.7 !important;
    overflow-wrap: anywhere;
  }

  #back-cover .back-contact-panel {
    position: static !important;
    inset: auto !important;
    width: 100%;
    margin: 12px 0 0 !important;
  }

  #back-cover .back-contact-heading {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 4px 10px;
    margin-bottom: 10px;
  }

  #back-cover .back-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  #back-cover .back-contact-card {
    box-sizing: border-box;
    min-width: 0;
    min-height: 0;
    padding: 9px 6px;
    gap: 6px;
  }

  #back-cover .back-contact-card img {
    width: clamp(64px, 15vw, 88px);
    height: clamp(64px, 15vw, 88px);
  }

  #back-cover .back-contact-card strong {
    overflow-wrap: anywhere;
  }

  #back-cover .back-cover-meta {
    position: static !important;
    inset: auto !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    width: 100%;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid rgba(148, 163, 184, 0.24);
    font-size: 9px;
  }

  #back-cover .back-cover-meta > div:last-child {
    margin-top: 0;
    text-align: left !important;
    overflow-wrap: anywhere;
  }

  #back-cover .page-footer {
    margin-top: 14px;
    font-size: 8px !important;
  }
}

@media screen and (max-width: 560px) {
  #back-cover .back-contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  #back-cover .back-contact-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px;
    grid-template-rows: auto auto;
    align-items: center;
    gap: 4px 12px;
    min-height: 88px;
    padding: 8px 10px;
    text-align: left;
  }

  #back-cover .back-contact-card strong {
    grid-column: 1;
    grid-row: 1;
    font-size: 10px;
  }

  #back-cover .back-contact-card img {
    grid-column: 2;
    grid-row: 1 / span 2;
    width: 72px;
    height: 72px;
  }

  #back-cover .back-contact-card small {
    grid-column: 1;
    grid-row: 2;
    font-size: 8px;
  }
}