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var(--accent-primary);outline-offset:2px}.article-toc-fab{z-index:220;background:var(--accent-primary);color:#fff;cursor:pointer;-webkit-tap-highlight-color:transparent;border:none;border-radius:50%;justify-content:center;align-items:center;width:52px;height:52px;transition:background .2s,transform .2s;display:flex;position:fixed;inset-block-end:calc(var(--mobile-tab-bar-height) + 16px + env(safe-area-inset-bottom,0px));inset-inline-start:20px;box-shadow:0 4px 20px #0a81bb59}.article-toc-fab:hover{background:var(--accent-secondary)}.article-toc-fab:active{transform:scale(.96)}.article-toc-backdrop{z-index:300;cursor:pointer;background:#14222b73;border:none;position:fixed;inset:0}.article-toc-drawer{z-index:310;background:var(--bg-elevated);border-radius:var(--radius-lg) var(--radius-lg) 0 0;max-height:72vh;padding:0 20px 28px;position:fixed;inset-block-end:0;inset-inline:0;overflow-y:auto;box-shadow:0 -8px 40px #0a81bb1f}.article-toc-drawer__header{background:var(--bg-elevated);z-index:1;justify-content:flex-start;padding:12px 0 4px;display:flex;position:sticky;top:0}.article-toc-drawer__close{background:var(--bg-surface);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;display:inline-flex}.article-toc--drawer{box-shadow:none;border:none;padding:8px 0 0}@media (width>=768px){.article-hero{margin-top:calc(2.75rem + 20px)}}@media (width>=1024px){.article-layout{grid-template-columns:260px minmax(0,42rem);justify-content:center;align-items:start;gap:48px}.article-toc-desktop{align-self:start;display:block;position:sticky;top:96px}.article-toc-fab,.article-toc-backdrop,.article-toc-drawer{display:none}.article-main{max-width:none;margin-inline:0}}@media (width<=767px){.article-hero__title{max-width:none}.article-share{flex-direction:column;align-items:flex-start}}