.av-history-section { display: grid; grid-template-columns: minmax(210px, .7fr) minmax(0, 2fr); align-items: start; gap: clamp(36px, 5vw, 76px); padding: 48px 0 72px; border-top: 1px solid var(--av-line); scroll-margin-top: 120px; }
.av-history-intro { position: sticky; top: 124px; }
.av-history-eyebrow { display: flex; align-items: center; gap: 12px; color: var(--site-primary); font-size: 11px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.av-history-eyebrow::before { content: ""; width: 30px; height: 2px; background: currentColor; }
.av-editorial .av-history-intro h2 { margin: 22px 0 0; max-width: 310px; color: #203d4d; font-size: clamp(34px, 3.5vw, 48px); line-height: 1.14; }
.av-editorial .av-history-range { display: flex; align-items: center; gap: 15px; margin: 26px 0 0; color: var(--site-primary); font-size: 18px; font-variant-numeric: tabular-nums; letter-spacing: -.025em; }
.av-history-range > span { color: #9db8c8; }
.av-history-list { min-width: 0; list-style: none; margin: 0; padding: 0; }
.av-history-list > li { position: relative; padding-left: 30px; margin: 0 0 14px; }
.av-history-list > li::before { content: ""; position: absolute; top: 0; bottom: -14px; left: 6px; width: 1px; background: #cbdde8; }
.av-history-list > li::after { content: ""; position: absolute; top: 38px; left: 0; width: 13px; height: 13px; border: 2px solid #8eb7d2; border-radius: 50%; background: var(--av-paper); transition: background-color .2s, border-color .2s; }
.av-history-list > li:first-child::before { top: 44px; }
.av-history-list > li:last-child { margin-bottom: 0; }
.av-history-list > li:last-child::before { bottom: calc(100% - 44px); }
.av-history-list > li:only-child::before { display: none; }
.av-history-list > li:has(> details[open])::after { background: var(--site-primary); border-color: var(--site-primary); }
.av-history-item { border: 1px solid #dbe6ed; background: #fff; transition: border-color .2s, background-color .2s; }
.av-history-item[open] { border-color: #a9c9df; background: #f8fbfd; }
.av-history-item summary { display: grid; grid-template-columns: 86px minmax(0, 1fr) 34px; align-items: center; gap: 24px; min-height: 90px; padding: 22px 28px; list-style: none; cursor: pointer; }
.av-history-item summary::-webkit-details-marker { display: none; }
.av-history-item summary::marker { content: ""; }
.av-history-item summary:hover { background: #eef6fb; }
.av-history-item summary:focus-visible { outline: 2px solid var(--site-primary); outline-offset: 4px; }
.av-history-year { color: var(--site-primary); font-size: 32px; font-weight: 400; line-height: 1.2; letter-spacing: -.045em; font-variant-numeric: tabular-nums; }
.av-history-title { color: #294858; font-size: 17px; font-weight: 500; line-height: 1.5; }
.av-history-toggle { display: grid; place-items: center; width: 34px; height: 34px; color: var(--site-primary); border: 1px solid #d0e1ec; border-radius: 50%; }
.av-history-toggle > svg { display: block; }
.av-history-toggle__vertical { transform-origin: center; transition: transform .2s; }
.av-history-item[open] .av-history-toggle { color: #fff; border-color: var(--site-primary); background: var(--site-primary); }
.av-history-item[open] .av-history-toggle__vertical { transform: scaleY(0); }
.av-editorial .av-history-copy { padding: 0 28px 28px 138px; color: #5d7482; font-size: 15px; line-height: 1.85; }
.av-editorial .av-history-copy :where(p, li) { line-height: 1.85 !important; }
.av-history-copy > :first-child { margin-top: 0; }
.av-history-copy > :last-child { margin-bottom: 0; }
@media (max-width: 1000px) {
    .av-history-section { grid-template-columns: 1fr; gap: 30px; }
    .av-history-intro { position: static; }
    .av-editorial .av-history-intro h2 { max-width: none; font-size: 38px; margin-top: 16px; }
    .av-editorial .av-history-range { margin-top: 15px; }
}
@media (max-width: 600px) {
    .av-history-section { padding: 32px 0 46px; gap: 26px; }
    .av-editorial .av-history-intro h2 { font-size: 33px; }
    .av-editorial .av-history-range { font-size: 16px; }
    .av-history-list > li { padding-left: 22px; margin-bottom: 12px; }
    .av-history-list > li::before { left: 4px; bottom: -12px; }
    .av-history-list > li::after { top: 25px; width: 9px; height: 9px; }
    .av-history-list > li:first-child::before { top: 29px; }
    .av-history-list > li:last-child::before { bottom: calc(100% - 29px); }
    .av-history-item summary { grid-template-columns: minmax(0, 1fr) 32px; grid-template-areas: "year toggle" "title toggle"; gap: 8px 12px; min-height: 100px; padding: 18px; }
    .av-history-year { grid-area: year; font-size: 25px; }
    .av-history-title { grid-area: title; font-size: 16px; line-height: 1.5; }
    .av-history-toggle { grid-area: toggle; width: 32px; height: 32px; }
    .av-editorial .av-history-copy { padding: 0 18px 22px; font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
    .av-history-item, .av-history-toggle__vertical, .av-history-list > li::after { transition: none; }
}