.flash[data-astro-cid-zi45k6ww]{padding:48px 0 80px}.flash-header[data-astro-cid-zi45k6ww]{text-align:center;margin-bottom:24px}.flash-header[data-astro-cid-zi45k6ww] h1[data-astro-cid-zi45k6ww]{font-family:var(--font-display);font-size:clamp(36px,4vw,56px);font-weight:400;color:var(--color-ink);margin-bottom:6px}.flash-deck[data-astro-cid-zi45k6ww]{font-size:15px;color:var(--color-muted)}.flash-tabs[data-astro-cid-zi45k6ww]{display:flex;justify-content:center;gap:0;margin-bottom:32px}.flash-tab[data-astro-cid-zi45k6ww]{background:var(--color-bg);border:1px solid var(--color-border);padding:10px 20px;font-family:var(--font-mono);font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--color-muted);cursor:pointer;transition:color .15s ease,background .15s ease,border-color .15s ease}.flash-tab[data-astro-cid-zi45k6ww]+.flash-tab[data-astro-cid-zi45k6ww]{border-left:0}.flash-tab[data-astro-cid-zi45k6ww]:hover{color:var(--color-ink)}.flash-tab[data-astro-cid-zi45k6ww].is-active{background:var(--color-ink);color:var(--color-bg);border-color:var(--color-ink)}.flash-card-wrap[data-astro-cid-zi45k6ww]{display:flex;justify-content:center;margin-bottom:28px}.flash-card-scene[data-astro-cid-zi45k6ww]{width:100%;max-width:420px;aspect-ratio:1;perspective:1000px;-webkit-perspective:1000px}.flash-card[data-astro-cid-zi45k6ww]{width:100%;height:100%;position:relative;transform-style:preserve-3d;-webkit-transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,0,.2,1);background:none;border:0;padding:0;cursor:pointer;font:inherit;color:inherit}.flash-card[data-astro-cid-zi45k6ww][data-revealed=true]{transform:rotateY(180deg)}.flash-card-face[data-astro-cid-zi45k6ww]{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--color-paper);border:1px solid var(--color-border);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px}.flash-card-back[data-astro-cid-zi45k6ww]{transform:rotateY(180deg);gap:16px}.flash-card-primary[data-astro-cid-zi45k6ww]{line-height:1;text-align:center;transition:opacity .2s ease}.flash-card-primary[data-astro-cid-zi45k6ww].mode-zh{font-family:var(--font-zh);font-size:clamp(80px,14vw,140px);color:var(--color-ink)}.flash-card-primary[data-astro-cid-zi45k6ww].mode-pinyin{font-family:var(--font-display);font-style:italic;font-size:clamp(36px,5vw,60px);color:var(--color-ink);letter-spacing:.02em}.flash-card-primary[data-astro-cid-zi45k6ww].mode-meaning{font-family:var(--font-zh);font-size:clamp(28px,3.5vw,42px);color:var(--color-ink);padding:0 16px}.flash-card-secondary[data-astro-cid-zi45k6ww].mode-zh{font-family:var(--font-zh);font-size:clamp(48px,7vw,80px);color:var(--color-ink)}.flash-card-secondary[data-astro-cid-zi45k6ww].mode-pinyin{font-family:var(--font-display);font-style:italic;font-size:clamp(22px,3vw,32px);color:var(--color-muted)}.flash-card-tertiary[data-astro-cid-zi45k6ww]{font-family:var(--font-zh);font-size:clamp(18px,2.2vw,24px);color:var(--color-muted);text-align:center}.flash-card-example[data-astro-cid-zi45k6ww]{font-family:var(--font-zh);font-size:clamp(14px,1.8vw,18px);color:var(--color-muted);text-align:center;opacity:.7;max-width:100%;word-break:break-word}.flash-card-quaternary[data-astro-cid-zi45k6ww]{font-family:var(--font-zh);font-size:clamp(28px,4vw,48px);color:var(--color-ink);text-align:center;margin-top:8px}.flash-controls[data-astro-cid-zi45k6ww]{display:flex;justify-content:center;align-items:center;gap:16px;flex-wrap:wrap}.flash-controls[data-astro-cid-zi45k6ww] button[data-astro-cid-zi45k6ww]{background:var(--color-bg);border:1px solid var(--color-border);padding:10px 20px;font-family:var(--font-mono);font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--color-fg);cursor:pointer;transition:border-color .15s ease}.flash-controls[data-astro-cid-zi45k6ww] button[data-astro-cid-zi45k6ww]:hover{border-color:var(--color-ink)}.flash-controls[data-astro-cid-zi45k6ww] button[data-astro-cid-zi45k6ww].is-active{background:var(--color-ink);color:var(--color-bg);border-color:var(--color-ink)}.flash-counter[data-astro-cid-zi45k6ww]{font-family:var(--font-mono);font-size:12px;color:var(--color-muted);min-width:70px;text-align:center}.flash-filter-panel[data-astro-cid-zi45k6ww]{max-width:520px;margin:20px auto 0;border:1px solid var(--color-border);background:var(--color-paper);padding:20px;display:none}.flash-filter-panel[data-astro-cid-zi45k6ww][data-open=true]{display:block}.filter-book[data-astro-cid-zi45k6ww]{font-family:var(--font-display);font-size:16px;font-style:italic;color:var(--color-ink);margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--color-border)}.filter-head[data-astro-cid-zi45k6ww]{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-family:var(--font-mono);font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--color-fg)}.filter-levels[data-astro-cid-zi45k6ww]{display:flex;flex-wrap:wrap;gap:8px}.filter-chip[data-astro-cid-zi45k6ww]{display:inline-flex;align-items:center;gap:8px;background:var(--color-bg);border:1px solid var(--color-border);padding:8px 14px;cursor:pointer;font-family:var(--font-mono);font-size:11px;color:var(--color-fg);transition:border-color .15s ease}.filter-chip[data-astro-cid-zi45k6ww]:hover{border-color:var(--color-ink)}.filter-chip[data-astro-cid-zi45k6ww] input[data-astro-cid-zi45k6ww]{appearance:none;width:14px;height:14px;border:1px solid var(--color-border);border-radius:50%;background:var(--color-bg);margin:0;cursor:pointer;position:relative;transition:border-color .15s ease}.filter-chip[data-astro-cid-zi45k6ww] input[data-astro-cid-zi45k6ww]:checked{border-color:var(--color-ink);background:var(--color-ink)}.filter-chip[data-astro-cid-zi45k6ww] input[data-astro-cid-zi45k6ww]:checked:after{content:"";position:absolute;left:4px;top:4px;width:4px;height:4px;border-radius:50%;background:var(--color-bg)}.filter-chip-count[data-astro-cid-zi45k6ww]{color:var(--color-muted);font-size:10px}@media(max-width:560px){.flash[data-astro-cid-zi45k6ww]{padding:32px 0 56px}.flash-card-face[data-astro-cid-zi45k6ww]{padding:24px}.flash-controls[data-astro-cid-zi45k6ww]{gap:12px}.flash-controls[data-astro-cid-zi45k6ww] button[data-astro-cid-zi45k6ww]{padding:10px 14px}.flash-filter-panel[data-astro-cid-zi45k6ww]{margin-left:0;margin-right:0}}