:root {
  --archetype-content-max: 72rem;
  --archetype-session-gap: 18px;
  --archetype-hero-radius: var(--radius-lg);
  --archetype-reading-line: 1.95;
  --archetype-chip-radius: 999px;
}

:root[data-archetype="stem"] {
  --archetype-content-max: 72rem;
  --archetype-session-gap: 18px;
  --archetype-hero-radius: var(--radius-lg);
  --archetype-reading-line: 1.95;
}

:root[data-archetype="narrative"] {
  --archetype-content-max: 68rem;
  --archetype-session-gap: 24px;
  --archetype-hero-radius: calc(var(--radius-lg) + 2px);
  --archetype-reading-line: 2.08;
}

.v2-session-page .v2-session-main {
  max-width: var(--archetype-content-max);
  gap: var(--archetype-session-gap);
}

.v2-session-page .v2-hero {
  border-radius: var(--archetype-hero-radius);
}

.v2-session-page .rd-reader,
.v2-session-page .rd-p {
  line-height: calc(var(--archetype-reading-line) * var(--lh-scale, 1));
}

.v2-session-page .v2-chip {
  border-radius: var(--archetype-chip-radius);
}

.session-page[data-mode="detail"] .rd-reader {
  max-width: var(--reader-max, 46rem);
}

.rd-sec--classic {
  margin: 2.4rem 0;
}
.rd-sec--classic .rd-classic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: 1.8rem;
  align-items: start;
}
.rd-sec--classic .rd-classic-main {
  min-width: 0;
}
.rd-sec--classic .rd-classic-side {
  position: sticky;
  top: 6rem;
  border-inline-start: 2px solid color-mix(in srgb, var(--accent) 40%, transparent);
  padding-inline-start: 0.9rem;
}
.rd-sec--classic .rd-classic-side .rd-callout {
  padding: 0.6rem 0.75rem;
  margin: 0 0 0.8rem;
  border-radius: 0;
  border-inline-start: none;
  font-size: calc(0.74rem * var(--fs-scale, 1));
  line-height: 1.85;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}
.rd-sec--classic .rd-classic-side .rd-callout > b {
  font-size: calc(0.7rem * var(--fs-scale, 1));
  margin-bottom: 0.2rem;
  letter-spacing: 0.06em;
}
.rd-sec--classic .rd-classic-side .rd-callout > div {
  font-size: calc(0.74rem * var(--fs-scale, 1));
}

@media (max-width: 900px) {
  .rd-sec--classic .rd-classic-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .rd-sec--classic .rd-classic-side {
    position: static;
    border-inline-start: none;
    padding-inline-start: 0;
    margin-top: 1rem;
  }
  .rd-sec--classic .rd-classic-side .rd-callout {
    border: 1px solid var(--border-subtle);
    border-inline-start: 3px solid color-mix(in srgb, var(--accent) 40%, transparent);
    border-radius: 0 10px 10px 0;
  }
}

.rd-sec--prism {
  position: relative;
  margin: 2.6rem 0;
}
.rd-sec--prism .rd-prism-tab {
  padding-inline-start: 1.6rem;
  position: relative;
  z-index: 2;
  margin-bottom: -1.1rem;
}
.rd-sec--prism .rd-prism-tab h2 {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 1.2rem 0.55rem 0.55rem;
  border-radius: 99px;
  background: linear-gradient(120deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #fff));
  color: var(--text-on-accent);
  font-size: calc(0.95rem * var(--fs-scale, 1));
  font-weight: 800;
  margin: 0;
  box-shadow: 0 14px 32px -16px color-mix(in srgb, var(--accent) 60%, transparent);
}
.rd-sec--prism .rd-prism-tab .rd-sec-num {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.22);
  color: inherit;
  font-size: calc(0.78rem * var(--fs-scale, 1));
  margin: 0;
  border: none;
}
.rd-sec--prism .rd-prism-body {
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 1.7rem 1.5rem 1.2rem;
  transition:
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}
.rd-sec--prism .rd-prism-body:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border-subtle));
  box-shadow: var(--shadow-base);
}
@media (max-width: 600px) {
  .rd-sec--prism .rd-prism-tab {
    padding-inline-start: 0;
  }
  .rd-sec--prism .rd-prism-body {
    padding: 1.4rem 1rem 1rem;
  }
}

[data-layout="atlas"] .rd-reader--atlas .rd-intro,
[data-layout="atlas"] .rd-reader--atlas .rd-outro {
  max-width: 100%;
}
.rd-atlas-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
  width: 100%;
}
.rd-atlas-col {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  min-width: 0;
}
.rd-atlas-col .rd-sec {
  margin: 0;
}
.rd-atlas-full {
  margin-top: 1.75rem;
}
.rd-atlas-full .rd-sec {
  margin-bottom: 1.5rem;
}
@media (max-width: 900px) {
  .rd-atlas-grid {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }
}

.rd-atlas-flow {
  column-count: 1;
  column-gap: 0;
  column-fill: auto;
  width: 100%;
}
.rd-atlas-flow .rd-sec {
  break-inside: avoid-column;
  page-break-inside: avoid;
  margin: 1.4rem 0;
}
.rd-atlas-flow .rd-sec > h2 {
  break-after: avoid;
}
.rd-atlas-flow .rd-sec > .rd-p,
.rd-atlas-flow .rd-sec > .rd-list,
.rd-atlas-flow .rd-sec > .rd-h3,
.rd-atlas-flow .rd-sec > .rd-h4,
.rd-atlas-flow .rd-sec > .rd-quote,
.rd-atlas-flow .rd-sec > .rd-callout,
.rd-atlas-flow .rd-sec > .rd-define {
  break-inside: avoid;
}
.rd-atlas-flow .rd-sec > .rd-figure,
.rd-atlas-flow .rd-sec > .rd-table-wrap,
.rd-atlas-flow .rd-sec > .rd-formula,
.rd-atlas-flow .rd-sec > .rd-math,
.rd-atlas-flow .rd-sec > .rd-widget {
  break-inside: avoid;
  margin: 1rem 0;
}
@media (max-width: 900px) {
  .rd-atlas-flow {
    column-count: 1;
    column-rule: 0;
  }
}

.rd-reader--notebook {
  padding-top: 0.4rem;
}
.rd-sec--notebook {
  position: relative;
  margin: 2.6rem 0;
  padding: 1.6rem 1.4rem 1.3rem;
  border-radius: 20px;
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  transform: rotate(var(--rot, 0));
  transition: transform 0.5s var(--ease);
  box-shadow: 0 22px 44px -36px rgba(0, 0, 0, 0.75);
}
.rd-sec--notebook:hover {
  transform: rotate(0);
}
.rd-sec--notebook::before {
  content: "";
  position: absolute;
  top: -10px;
  inset-inline-start: 32px;
  width: 76px;
  height: 18px;
  background: color-mix(in srgb, var(--accent) 45%, #fff);
  opacity: 0.55;
  transform: rotate(-3deg);
  border-radius: 2px;
}
.rd-sec--notebook:nth-of-type(even)::before {
  inset-inline-start: auto;
  inset-inline-end: 38px;
  transform: rotate(4deg);
  background: color-mix(in srgb, var(--color-green) 45%, #fff);
}
.rd-sec--notebook h2 {
  margin-top: 0.3rem;
}
.rd-sec--notebook .rd-callout,
.rd-sec--notebook .rd-formula,
.rd-sec--notebook .rd-figure {
  transform: rotate(-0.3deg);
}
@media (max-width: 600px) {
  .rd-sec--notebook {
    transform: none;
    padding: 1.2rem 1rem 1rem;
  }
  .rd-sec--notebook::before {
    display: none;
  }
  .rd-sec--notebook:hover {
    transform: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .rd-sec--notebook {
    transform: none;
  }
  .rd-sec--notebook::before {
    transform: none;
  }
}