.tb-reading{--tb-accent:var(--color-accent,#356f65);--tb-muted:var(--color-text-muted,#68706a);--tb-border:var(--color-border,#d7d8d1);max-width:1140px;color:var(--color-text-main,#20231f);margin:auto;padding:clamp(24px,5vw,64px) clamp(16px,4vw,56px) 80px}.tb-reading__header{max-width:820px;margin-bottom:36px}.tb-reading__back-link{color:var(--tb-accent);margin-bottom:18px;font-size:.9rem;text-decoration:none;display:inline-block}.tb-reading__back-link:hover{text-decoration:underline}.tb-reading__eyebrow{color:var(--tb-accent);letter-spacing:.1em;text-transform:uppercase;margin:0 0 14px;font-size:.78rem;font-weight:700;display:block}.tb-reading__title{letter-spacing:-.03em;text-wrap:balance;margin:0 0 22px;font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.18}.tb-reading__lede{margin:0 0 18px;font-size:clamp(1.06rem,1.9vw,1.24rem);line-height:1.85}.tb-reading__meta{color:var(--tb-muted);margin:8px 0;font-size:.9rem;line-height:1.8}.tb-reading__layout{grid-template-columns:minmax(0,760px) minmax(200px,260px);align-items:start;gap:48px;display:grid}.tb-reading__body{min-width:0}.tb-reading__paragraph,.tb-reading__list-item{overflow-wrap:break-word;font-size:1.04rem;line-height:1.95}.tb-reading__paragraph{margin:0 0 20px}.tb-reading__strong{font-weight:700}.tb-reading__link{color:var(--tb-accent);text-underline-offset:3px}.tb-reading__heading{letter-spacing:-.02em;margin:52px 0 20px;scroll-margin-top:100px;font-size:1.6rem;line-height:1.4}.tb-reading__subheading{margin:30px 0 14px;scroll-margin-top:100px;font-size:1.16rem;line-height:1.6}.tb-reading__equation{background:color-mix(in srgb,var(--tb-accent) 5%,transparent);border-radius:8px;max-width:100%;margin:20px 0;padding:10px 8px;overflow-x:auto}.tb-reading__list{margin:18px 0 24px;padding-left:26px}.tb-reading__list-item{margin-bottom:10px}.tb-reading__table-scroll{max-width:100%;margin:24px 0 28px;overflow-x:auto}.tb-reading__table{border-collapse:collapse;min-width:min(100%,420px);font-size:.95rem;line-height:1.6}.tb-reading__table-caption{caption-side:top;text-align:left;color:var(--color-text-main,#20231f);padding-bottom:10px;font-size:.92rem;line-height:1.7}.tb-reading__table-header{text-align:left;border-bottom:2px solid var(--tb-border);white-space:nowrap;padding:8px 14px;font-weight:650}.tb-reading__table-cell{border-bottom:1px solid var(--tb-border);vertical-align:top;padding:8px 14px}.tb-reading__answer{border:1px solid color-mix(in srgb,var(--tb-accent) 28%,transparent);background:var(--color-card-background,#fbfbf8);border-radius:10px;margin:14px 0;padding:14px 18px}.tb-reading__answer-title{cursor:pointer;justify-content:space-between;gap:16px;font-weight:650;line-height:1.6;display:flex}.tb-reading__answer-hint{color:var(--tb-muted);font-size:.86rem;font-weight:400}.tb-reading__answer[open]>.tb-reading__answer-title{margin-bottom:14px}.tb-reading__answer[open]>.tb-reading__answer-title>.tb-reading__answer-hint{visibility:hidden}.tb-reading__section{margin-top:24px}.tb-reading__lab{border:1px solid var(--tb-border);color:inherit;background:color-mix(in srgb,var(--tb-accent) 5%,transparent);transition:border-color var(--transition,.15s ease);border-radius:12px;margin:14px 0;padding:18px 20px;text-decoration:none;display:block}.tb-reading__lab:hover{border-color:var(--tb-accent)}.tb-reading__lab-name{color:var(--tb-accent);margin-bottom:6px;font-weight:700;display:block}.tb-reading__lab-description{font-size:.95rem;line-height:1.7;display:block}.tb-reading__source-list{padding-left:22px}.tb-reading__source{overflow-wrap:anywhere;margin:16px 0;font-size:.93rem;line-height:1.75}.tb-reading__source-note{color:var(--tb-muted);margin:4px 0}.tb-reading__pager{border-top:1px solid var(--tb-border);justify-content:space-between;gap:24px;margin-top:40px;padding-top:28px;font-size:.94rem;line-height:1.7;display:flex}.tb-reading__pager-planned{color:var(--tb-muted)}.tb-reading__sidebar{border-left:1px solid var(--tb-border);gap:28px;max-height:calc(100vh - 120px);padding-left:20px;display:grid;position:sticky;top:96px;overflow-y:auto}.tb-reading__nav-link{color:inherit;margin:9px 0;font-size:.86rem;line-height:1.55;text-decoration:none;display:block}.tb-reading__nav-link:hover{color:var(--tb-accent)}.tb-reading__nav-link[aria-current=page]{color:var(--tb-accent);font-weight:700}.tb-reading__chapter-items{margin:0;padding:0;list-style:none}.tb-reading__chapter-item{margin:0}.tb-reading__nav-planned{color:var(--tb-muted);margin:9px 0;font-size:.86rem;line-height:1.55;display:block}.tb-reading__planned-badge{border:1px solid var(--tb-border);color:var(--tb-muted);white-space:nowrap;border-radius:999px;margin-left:8px;padding:0 7px;font-size:.74rem;line-height:1.6;display:inline-block}@media (width<=860px){.tb-reading__layout{display:block}.tb-reading__sidebar{border-left:0;border-top:1px solid var(--tb-border);max-height:none;margin-top:44px;padding:24px 0 0;position:static}.tb-reading__pager{flex-direction:column}.tb-reading__equation{padding:8px 4px}}