.topic-nav[data-astro-cid-l7ltk7hr]{position:sticky;top:53px;z-index:var(--z-dropdown);background:var(--bg-primary);border-bottom:1px solid var(--border-color);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);overflow:visible}[data-astro-cid-l7ltk7hr][data-theme=dark] .topic-nav[data-astro-cid-l7ltk7hr]{background:#0f0f1aeb}.topic-nav__inner[data-astro-cid-l7ltk7hr]{display:flex;align-items:center;gap:var(--space-4)}.topic-nav__scroll[data-astro-cid-l7ltk7hr]{flex:1;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;overflow-y:visible}.topic-nav__scroll[data-astro-cid-l7ltk7hr]::-webkit-scrollbar{display:none}.topic-nav__topic[data-astro-cid-l7ltk7hr]{font-family:var(--font-heading);font-weight:var(--weight-semibold);font-size:var(--text-sm);color:var(--text-tertiary);white-space:nowrap;flex-shrink:0;padding:var(--space-3) 0}.topic-nav__tabs[data-astro-cid-l7ltk7hr]{display:flex;align-items:center;gap:var(--space-1);list-style:none;padding:0;margin:0}.topic-nav__tab[data-astro-cid-l7ltk7hr]{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-secondary);text-decoration:none;white-space:nowrap;transition:all var(--transition-fast);position:relative;border:none;background:none;cursor:pointer;font-family:inherit}.topic-nav__tab[data-astro-cid-l7ltk7hr]:after{content:"";position:absolute;bottom:-1px;left:var(--space-4);right:var(--space-4);height:2px;background:transparent;border-radius:var(--radius-full) var(--radius-full) 0 0;transition:background var(--transition-fast)}.topic-nav__tab[data-astro-cid-l7ltk7hr]:hover{background:var(--bg-secondary);color:var(--text-primary)}.topic-nav__tab--active[data-astro-cid-l7ltk7hr]{color:var(--color-secondary);font-weight:var(--weight-semibold)}.topic-nav__tab--active[data-astro-cid-l7ltk7hr]:after{background:var(--color-secondary)}.topic-nav__tab--active[data-astro-cid-l7ltk7hr]:hover{background:#4ecdc40f}.topic-nav__tab--disabled[data-astro-cid-l7ltk7hr]{opacity:.4;cursor:not-allowed}.topic-nav__tab-icon[data-astro-cid-l7ltk7hr]{font-size:var(--text-base)}.topic-nav__chevron[data-astro-cid-l7ltk7hr]{transition:transform var(--transition-fast);flex-shrink:0}.is-open[data-astro-cid-l7ltk7hr] .topic-nav__chevron[data-astro-cid-l7ltk7hr]{transform:rotate(180deg)}.topic-nav__dropdown-wrap[data-astro-cid-l7ltk7hr]{position:relative}.topic-nav__dropdown[data-astro-cid-l7ltk7hr]{position:fixed;min-width:280px;max-width:340px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-2);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity var(--transition-fast),transform var(--transition-fast),visibility var(--transition-fast);z-index:9999}.topic-nav__dropdown[data-astro-cid-l7ltk7hr].is-open{opacity:1;visibility:visible;transform:translateY(0)}.topic-nav__dropdown-item[data-astro-cid-l7ltk7hr]{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);text-decoration:none;color:inherit;transition:background var(--transition-fast)}.topic-nav__dropdown-item[data-astro-cid-l7ltk7hr]:hover{background:var(--bg-secondary);color:inherit}.topic-nav__dropdown-num[data-astro-cid-l7ltk7hr]{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:#4ecdc41a;color:var(--color-secondary);font-family:var(--font-heading);font-weight:var(--weight-bold);font-size:var(--text-xs);flex-shrink:0}.topic-nav__dropdown-text[data-astro-cid-l7ltk7hr]{display:flex;flex-direction:column;gap:2px;min-width:0}.topic-nav__dropdown-title[data-astro-cid-l7ltk7hr]{font-size:var(--text-sm);font-weight:var(--weight-medium);line-height:var(--leading-tight)}.topic-nav__dropdown-diff[data-astro-cid-l7ltk7hr]{font-size:var(--text-xs);color:var(--text-tertiary);text-transform:capitalize}@media(max-width:768px){.topic-nav__topic[data-astro-cid-l7ltk7hr]{display:none}.topic-nav__tab-label[data-astro-cid-l7ltk7hr]{font-size:var(--text-xs)}.topic-nav__tab[data-astro-cid-l7ltk7hr]{padding:var(--space-2) var(--space-3)}.topic-nav__dropdown[data-astro-cid-l7ltk7hr]{min-width:240px;left:-40px}}