/* Learn pages — Carbon type · full width · mobile-first */

.learn-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--cds-spacing-05);
  width: 100%;
  max-width: none;
  padding: var(--page-pad-y) var(--page-pad-x);
  min-width: 0;
}

/* Mobile TOC: horizontal chip strip */
.learn-toc {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--cds-spacing-02);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  padding: var(--cds-spacing-02) 0 var(--cds-spacing-03);
  margin: 0 calc(-1 * var(--page-pad-x));
  padding-inline: var(--page-pad-x);
  border-block-end: 1px solid var(--line);
  scrollbar-width: thin;
}
.learn-toc__title {
  flex: 0 0 auto;
  font-size: var(--cds-label-01);
  font-weight: 600;
  letter-spacing: 0.32px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
  padding-inline-end: var(--cds-spacing-02);
  white-space: nowrap;
}
.learn-toc a {
  flex: 0 0 auto;
  display: inline-block;
  padding: var(--cds-spacing-02) var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  line-height: 1.33333;
  color: var(--as-secondary);
  background: var(--as-secondary-soft);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
}
.learn-toc a:hover {
  color: var(--as-secondary);
  text-decoration: none;
  filter: brightness(0.97);
}

@media (min-width: 66rem) {
  .learn-layout {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: var(--cds-spacing-07);
  }
  .learn-toc {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    overflow-x: visible;
    overflow-y: auto;
    scroll-snap-type: none;
    position: sticky;
    top: calc(var(--cds-header-h) + var(--cds-spacing-05));
    align-self: start;
    max-height: calc(100dvh - var(--cds-header-h) - var(--cds-spacing-07));
    margin: 0;
    padding: 0;
    border-block-end: 0;
    gap: 0;
  }
  .learn-toc__title {
    margin: 0 0 var(--cds-spacing-03);
    padding: 0;
  }
  .learn-toc a {
    display: block;
    padding: var(--cds-spacing-02) 0;
    padding-inline-start: var(--cds-spacing-03);
    background: transparent;
    color: var(--ink-soft);
    border-inline-start: 2px solid transparent;
    white-space: normal;
  }
  .learn-toc a:hover {
    color: var(--as-secondary);
    filter: none;
  }
}

.learn {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  min-width: 0;
  font-size: var(--cds-body-02);
  line-height: 1.55;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.learn-hero {
  margin-bottom: var(--cds-spacing-06);
  padding-bottom: var(--cds-spacing-05);
  border-bottom: 1px solid var(--line);
  width: 100%;
}
.learn-kicker {
  margin: 0 0 var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  font-weight: 600;
  letter-spacing: 0.32px;
  line-height: 1.33333;
  text-transform: uppercase;
  color: var(--as-secondary);
}
.learn-hero h1 {
  margin: 0 0 var(--cds-spacing-04);
  font-size: clamp(1.35rem, 4.5vw, 1.75rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.25;
}
.learn-lede {
  margin: 0;
  font-size: var(--cds-body-02);
  color: var(--ink-soft);
  max-width: 42rem;
  line-height: 1.55;
}

.learn h2 {
  margin: var(--cds-spacing-07) 0 var(--cds-spacing-04);
  font-size: clamp(1.15rem, 3.5vw, 1.25rem);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0;
}
.learn h3 {
  margin: var(--cds-spacing-06) 0 var(--cds-spacing-03);
  font-size: var(--cds-heading-02);
  font-weight: 600;
  line-height: 1.45;
}
.learn p,
.learn li {
  color: var(--ink-soft);
  font-size: var(--cds-body-02);
  line-height: 1.55;
}
.learn ul,
.learn ol {
  padding-left: 1.2rem;
  margin: 0 0 var(--cds-spacing-04);
}
.learn li + li {
  margin-top: 0.35rem;
}
.learn code {
  font-size: 0.9em;
  word-break: break-word;
}

/* ——— Executive summary ——— */
.summary-box {
  background: linear-gradient(145deg, var(--as-secondary) 0%, #2f2468 100%);
  color: #fff;
  padding: clamp(1rem, 3vw, 1.35rem) clamp(1rem, 3vw, 1.5rem);
  margin: 0 0 var(--cds-spacing-06);
  width: 100%;
  box-shadow: 0 8px 24px rgba(66, 51, 143, 0.18);
}
.summary-box h2 {
  margin: 0 0 var(--cds-spacing-04);
  font-size: var(--cds-heading-02);
  font-weight: 600;
  color: #fff;
}
.summary-box ol,
.summary-box ul {
  margin: 0;
  padding-left: 1.2rem;
}
.summary-box li {
  color: #fff;
  margin: var(--cds-spacing-03) 0;
  font-size: var(--cds-body-01);
  line-height: 1.5;
}
.summary-box code {
  background: rgba(255, 255, 255, 0.14);
  padding: 0.05em 0.35em;
}

/* ——— Steps ——— */
.step-cards {
  display: grid;
  gap: 0;
  margin: var(--cds-spacing-05) 0 var(--cds-spacing-06);
  counter-reset: step;
  width: 100%;
}
.step-card {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--cds-spacing-04);
  border-block-end: 1px solid var(--line);
  padding: var(--cds-spacing-04) 0;
}
.step-card::before {
  counter-increment: step;
  content: counter(step);
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--as-secondary-soft);
  color: var(--as-secondary);
  font-weight: 600;
  font-size: var(--cds-label-01);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
[data-theme="dark"] .step-card::before {
  color: var(--as-secondary);
}
.step-card h3 {
  margin: 0 0 var(--cds-spacing-02);
  font-size: var(--cds-heading-compact-01);
  font-weight: 600;
}
.step-card p {
  margin: 0;
  font-size: var(--cds-body-01);
}

.fig {
  margin: var(--cds-spacing-05) 0 var(--cds-spacing-06);
  width: 100%;
  min-width: 0;
}
.fig-caption {
  margin: var(--cds-spacing-03) 0 0;
  font-size: var(--cds-helper-text-01);
  color: var(--muted);
  text-align: center;
  line-height: 1.4;
}

.illus {
  background: var(--surface);
  border-block: 1px solid var(--line);
  padding: var(--cds-spacing-04);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  max-width: 100%;
}
.illus svg {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  min-width: min(100%, 20rem);
}

.do-dont {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--cds-spacing-05);
  margin: var(--cds-spacing-05) 0;
  width: 100%;
}
@media (min-width: 36rem) {
  .do-dont {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--cds-spacing-06);
  }
}
.do-dont > div {
  border-block-start: 3px solid var(--line);
  padding: var(--cds-spacing-04) 0;
  min-width: 0;
}
.do-dont .do {
  border-block-start-color: #188038;
}
.do-dont .dont {
  border-block-start-color: #d93025;
}
.do-dont h3 {
  margin: 0 0 var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  text-transform: uppercase;
  letter-spacing: 0.32px;
}
.do-dont .do h3 {
  color: #188038;
}
.do-dont .dont h3 {
  color: #d93025;
}
.do-dont ul {
  margin: 0;
  padding-left: 1.15rem;
  font-size: var(--cds-body-01);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cds-spacing-02) var(--cds-spacing-03);
  margin: var(--cds-spacing-04) 0 var(--cds-spacing-05);
}
.chip {
  display: inline-block;
  padding: var(--cds-spacing-02) var(--cds-spacing-03);
  background: var(--as-tertiary-soft);
  color: var(--as-tertiary-deep);
  font-size: var(--cds-label-01);
  font-weight: 500;
  line-height: 1.33333;
  max-width: 100%;
  overflow-wrap: anywhere;
}
[data-theme="dark"] .chip {
  color: var(--as-tertiary);
}

.section-anchor {
  scroll-margin-top: calc(var(--cds-header-h) + var(--cds-spacing-05));
}

.learn details.deep {
  border-block: 1px solid var(--line);
  background: transparent;
  padding: var(--cds-spacing-04) 0;
  margin: var(--cds-spacing-05) 0;
}
.learn details.deep summary {
  cursor: pointer;
  font-weight: 600;
  font-size: var(--cds-body-compact-01);
  color: var(--as-secondary);
  padding: var(--cds-spacing-02) 0;
}

/* ——— Tables: scroll on tablet+, cards on phone ——— */
.table-wrap {
  position: relative;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--cds-spacing-05) 0;
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
  scrollbar-width: thin;
}
.table-wrap::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset-block: 0;
  inset-inline-end: 0;
  width: 1.25rem;
  background: linear-gradient(to left, var(--surface), transparent);
  opacity: 0;
  transition: opacity 0.15s;
}
.table-wrap[data-scrollable="true"]::after {
  opacity: 1;
}
.table-wrap__hint {
  display: none;
  font-size: var(--cds-helper-text-01);
  color: var(--muted);
  padding: var(--cds-spacing-02) var(--cds-spacing-03);
  background: var(--paper-2);
  border-block-end: 1px solid var(--line);
}
.table-wrap[data-scrollable="true"] > .table-wrap__hint {
  display: block;
}

.learn .table-wrap table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-size: var(--cds-body-01);
  line-height: 1.45;
}
.learn .table-wrap th,
.learn .table-wrap td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.learn .table-wrap th {
  background: var(--paper-2);
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.learn .table-wrap td {
  color: var(--ink-soft);
}
.learn .table-wrap tr:last-child td {
  border-bottom: 0;
}
.learn .table-wrap code {
  font-size: 0.88em;
}

/* Phone: each row becomes a labeled card */
@media (max-width: 42rem) {
  .table-wrap.is-cards {
    border: 0;
    background: transparent;
    overflow: visible;
  }
  .table-wrap.is-cards::after {
    display: none;
  }
  .table-wrap.is-cards .table-wrap__hint {
    display: none;
  }
  .table-wrap.is-cards table,
  .table-wrap.is-cards tbody {
    display: block;
    width: 100%;
  }
  .table-wrap.is-cards thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .table-wrap.is-cards tr {
    display: block;
    margin: 0 0 var(--cds-spacing-04);
    padding: var(--cds-spacing-03) var(--cds-spacing-04);
    border: 1px solid var(--line);
    background: var(--surface);
    border-block-start: 3px solid var(--as-tertiary);
  }
  .table-wrap.is-cards tr:last-child {
    margin-bottom: 0;
  }
  .table-wrap.is-cards th,
  .table-wrap.is-cards td {
    display: grid;
    grid-template-columns: minmax(5.5rem, 34%) minmax(0, 1fr);
    gap: var(--cds-spacing-03);
    align-items: start;
    width: 100%;
    padding: var(--cds-spacing-03) 0;
    border-bottom: 1px solid var(--line-soft);
    white-space: normal;
  }
  .table-wrap.is-cards tr > *:last-child {
    border-bottom: 0;
    padding-bottom: 0;
  }
  .table-wrap.is-cards tr > *:first-child {
    padding-top: 0;
  }
  .table-wrap.is-cards td::before {
    content: attr(data-label);
    font-weight: 600;
    font-size: var(--cds-label-01);
    letter-spacing: 0.02em;
    color: var(--as-secondary);
    line-height: 1.35;
  }
  .table-wrap.is-cards td:not([data-label])::before,
  .table-wrap.is-cards td[data-label=""]::before {
    content: none;
  }
  .table-wrap.is-cards td:not([data-label]),
  .table-wrap.is-cards td[data-label=""] {
    grid-template-columns: 1fr;
  }

  .summary-box li {
    margin: var(--cds-spacing-04) 0;
  }

  .learn-pager {
    flex-direction: column;
  }
  .learn-pager .cds-btn {
    width: 100%;
    justify-content: center;
  }
}

.learn pre.code {
  font-size: clamp(0.78rem, 2.6vw, 0.875rem);
  padding: clamp(0.85rem, 2.5vw, 1.15rem);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  tab-size: 2;
}

.mermaid-wrap {
  max-width: 100%;
}
.mermaid-wrap .mermaid svg {
  max-width: 100%;
  height: auto;
}