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var(--line)}.controls-inner[data-astro-cid-av6x7ffq]{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px}.search-wrap[data-astro-cid-av6x7ffq]{flex:1 1 320px;min-width:0;display:flex;align-items:center;gap:12px;min-height:48px;padding:0 8px 0 20px;border:1px solid var(--control-border);border-radius:999px;background:var(--bg-2);box-shadow:inset 0 1px 0 var(--hi);transition:border-color .3s,box-shadow .3s}.search-wrap[data-astro-cid-av6x7ffq]:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in oklch,var(--accent) 12%,transparent)}.search-label[data-astro-cid-av6x7ffq]{flex:none;font-family:var(--font);font-size:.76rem;font-weight:500;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3)}.search-wrap[data-astro-cid-av6x7ffq] input[data-astro-cid-av6x7ffq]{flex:1;min-width:0;min-height:44px;padding:0;border:0;border-radius:0;background:transparent;font:400 16px/1.4 var(--font);color:var(--ink);outline:none}.search-wrap[data-astro-cid-av6x7ffq] 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45%,transparent)}.result-count[data-astro-cid-av6x7ffq]{margin-top:8px;min-height:1.4em;font-family:var(--mono);font-size:.78rem;font-variant-numeric:tabular-nums;color:var(--ink-3)}.lessons-body[data-astro-cid-av6x7ffq]{padding:40px 0 72px}.tier-block[data-astro-cid-av6x7ffq]{margin-bottom:56px}.tier-block[data-astro-cid-av6x7ffq]:last-of-type{margin-bottom:0}.tier-block[data-astro-cid-av6x7ffq][hidden]{display:none}.tier-head[data-astro-cid-av6x7ffq]{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:0 0 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a[data-astro-cid-av6x7ffq]:hover{color:var(--accent)}.lesson-lede[data-astro-cid-av6x7ffq]{max-width:70ch;margin:0 0 12px;font-size:.97rem;line-height:1.6;color:var(--ink-2)}.topic-chips[data-astro-cid-av6x7ffq]{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}.topic-chip[data-astro-cid-av6x7ffq]{padding:3px 10px;border-radius:999px;background:var(--bg-3);font-family:var(--mono);font-size:.74rem;color:var(--ink-2);overflow-wrap:anywhere}.no-results[data-astro-cid-av6x7ffq]{padding:64px 0;text-align:center;color:var(--ink-3)}.no-results[data-astro-cid-av6x7ffq][hidden]{display:none}@media(max-width:760px){.lesson-controls[data-astro-cid-av6x7ffq]{padding:12px 0 10px}.controls-inner[data-astro-cid-av6x7ffq]{flex-direction:column;align-items:stretch}.search-wrap[data-astro-cid-av6x7ffq]{flex:0 0 auto;padding-left:16px}.chips[data-astro-cid-av6x7ffq]{justify-content:flex-start}}@media(max-width:640px){.lessons-body[data-astro-cid-av6x7ffq]{padding:28px 0 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