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var(--space-8);grid-template-columns:minmax(0,1fr);display:grid}.rail{gap:var(--space-4);align-content:start;min-width:0;display:grid}.rail-card{padding:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.rail-topic{letter-spacing:-.01em;color:var(--color-text);font-size:1rem;font-weight:700;line-height:1.4rem}.rail-meta{font-size:var(--fs-caption);line-height:var(--lh-caption);color:var(--color-text-muted);margin-top:2px}.rail-kind{margin-top:var(--space-4);font-size:var(--fs-caption);line-height:var(--lh-caption);letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-muted);font-weight:600}.rail-lessons{margin:var(--space-4) 0 0;gap:2px;padding:0;list-style:none;display:grid}.rail-lessons a{gap:var(--space-3);min-height:40px;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);font-size:var(--fs-small);color:var(--color-text-muted);grid-template-columns:22px 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.tag{font-family:var(--mono);border:1px solid var(--color-border-strong);border-radius:3px;margin-right:10px;padding:2px 6px;font-size:.7rem}.prose div.lvl{border-top:1px solid var(--line);align-items:baseline;gap:12px;padding:10px 0;display:flex}.prose td.y{color:var(--color-success)}.prose td.n{color:var(--color-error)}.prose td.num{font-family:var(--mono);font-variant-numeric:tabular-nums}.prose figure{text-align:center;margin:32px 0}.prose figure svg{max-width:100%;height:auto;margin-inline:auto;display:block}.prose figcaption{color:var(--muted);text-align:left;margin-top:10px;font-size:.82rem}.prose :is(figure,pre,.table-scroll):focus-visible{outline:2px solid var(--color-focus);outline-offset:-2px}@media (width<=700px){.prose figure{margin-inline:-20px;padding-block-end:var(--space-3);padding-inline:20px;overflow-x:auto}.prose figure svg{min-width:640px;max-width:none}.prose th,.prose td{padding:8px}}.prose sup a{padding:8px 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