:root {
  --upgrade-space: clamp(56px, 8vw, 112px);
  --upgrade-radius: var(--site-radius);
  --upgrade-content: 1160px;
}
.upgrade-wrap { width: min(var(--upgrade-content), calc(100% - 48px)); margin-inline: auto; }
.upgrade-hero { padding: var(--upgrade-space) 0 56px; }
.upgrade-eyebrow { color: var(--site-blue); font-weight: 600; margin-bottom: 20px; }
.upgrade-hero h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.12; letter-spacing: -.045em; max-width: 900px; margin: 0 0 24px; text-wrap: balance; }
.upgrade-lead { font-size: clamp(18px, 2vw, 23px); color: var(--site-muted); line-height: 1.7; max-width: 760px; }
.upgrade-actions { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; margin-top: 28px; }
.upgrade-section { padding-block: 56px; }
.upgrade-section h2 { font-size: clamp(26px, 3vw, 38px); line-height: 1.3; letter-spacing: -.03em; margin: 0 0 28px; }
.upgrade-soft { background: var(--site-ice); }
.upgrade-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.upgrade-card { padding: 32px; background: var(--site-ice); border-radius: var(--upgrade-radius); min-width: 0; }
.upgrade-soft .upgrade-card { background: var(--site-white); }
.upgrade-card h3 { font-size: 24px; margin: 0 0 14px; }
.upgrade-card p, .upgrade-section p, .upgrade-section li { line-height: 1.85; }
.upgrade-card a, .upgrade-link { color: var(--site-blue); }
.upgrade-card a { display: inline-block; margin-top: 14px; }
.upgrade-card[hidden] { display: none; }
.upgrade-feature { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding: 48px; background: var(--site-ice); border-radius: var(--upgrade-radius); }
.upgrade-feature h2 { font-size: clamp(32px, 4vw, 52px); line-height: 1.15; margin: 16px 0; }
.upgrade-feature img, .course-banner { width: 100%; height: auto; display: block; border-radius: var(--site-image-radius); }
.course-banner { margin-top: 40px; }
.learning-controls { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 28px; }
.learning-controls label { display: grid; gap: 8px; flex: 1; min-width: 180px; }
.learning-controls input, .learning-controls select { min-height: 48px; padding: 10px 14px; border: 1px solid var(--site-line); border-radius: var(--site-radius); background: var(--site-white); color: var(--site-ink); font: inherit; width: 100%; }
.reader-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 48px; padding-bottom: 80px; align-items: start; }
.reader-directory { position: sticky; top: 100px; max-height: calc(100vh - 120px); overflow-y: auto; padding: 20px; border-radius: var(--site-radius); background: var(--site-ice); }
.reader-directory { scrollbar-width: none; }
.reader-directory::-webkit-scrollbar { display: none; }
.learning-hero-image { margin-block: 0 56px; }
.learning-hero-image img { display: block; width: 100%; height: auto; border-radius: var(--site-image-radius); }
.reader-directory summary { cursor: pointer; font-weight: 600; }
.reader-directory a { display: block; font-size: 14px; line-height: 1.6; padding: 9px 0; color: var(--site-muted); }
.reader-directory a[aria-current], .reader-directory a:hover { color: var(--site-blue); }
.reader-directory hr { border: 0; border-top: 1px solid var(--site-line); margin-block: 16px; }
.reader-article { min-width: 0; font-size: 17px; line-height: 1.95; overflow-wrap: anywhere; }
.reader-article h2 { font-size: 30px; margin-top: 56px; scroll-margin-top: 100px; line-height: 1.45; }
.reader-article h3 { font-size: 23px; margin-top: 36px; scroll-margin-top: 100px; }
.reader-article img { max-width: 100%; height: auto; border-radius: var(--site-image-radius); }
.reader-article pre { position: relative; max-width: 100%; overflow-x: auto; background: var(--site-ice); padding: 44px 20px 20px; border-radius: var(--site-radius); font-size: 14px; line-height: 1.7; }
.reader-article pre code { white-space: pre; overflow-wrap: normal; }
.reader-article blockquote { border-left: 3px solid var(--site-blue); margin-inline: 0; padding-left: 20px; color: var(--site-muted); }
.reader-table { max-width: 100%; overflow-x: auto; }
.reader-table table { border-collapse: collapse; width: 100%; font-size: 14px; }
.reader-table th, .reader-table td { border-bottom: 1px solid var(--site-line); padding: 12px; text-align: left; min-width: 120px; }
.reader-pager { display: flex; gap: 24px; justify-content: space-between; flex-wrap: wrap; border-top: 1px solid var(--site-line); margin-top: 48px; padding-top: 24px; }
.reader-copy { position: absolute; top: 8px; right: 10px; border: 1px solid var(--site-line); border-radius: var(--site-button-radius); padding: 4px 10px; background: white; cursor: pointer; }
.member-layout { display: grid; grid-template-columns: minmax(200px, 340px) 1fr; gap: 64px; align-items: start; }
.member-photo { width: 100%; max-height: 460px; object-fit: cover; border-radius: var(--site-image-radius); }
.member-monogram { padding: 64px 24px; background: var(--site-ice); border-radius: var(--upgrade-radius); font-size: 44px; text-align: center; }
@media (max-width: 760px) {
  .upgrade-wrap { width: calc(100% - 32px); }
  .upgrade-grid, .upgrade-feature, .member-layout, .reader-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .upgrade-feature, .upgrade-card { padding: 24px; }
  .reader-directory { position: static; max-height: none; }
  .member-photo { max-width: 260px; }
  .upgrade-section { padding-block: 36px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }