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linear 125ms}.flash-face.back{transform:rotateY(180deg)}.flash-card.hint-know .flash-face{border-color:var(--flash-know)}.flash-card.hint-learning .flash-face{border-color:var(--flash-learning)}.flash-stamp{position:absolute;top:1rem;left:50%;z-index:2;transform:translate(-50%);padding:.2rem .8rem;border-radius:999px;color:#fff;font-weight:700;pointer-events:none}.hint-know .flash-stamp{background:var(--flash-know)}.hint-learning .flash-stamp{background:var(--flash-learning)}.flash-speak{position:absolute;top:.6rem;right:.6rem;display:grid;place-items:center;width:2.5rem;height:2.5rem;border:0;border-radius:50%;background:transparent;color:var(--flash-muted);cursor:pointer}.flash-speak:hover{background:#eef0f6;color:var(--flash-ink)}.flash-word-side{text-align:center}.flash-word{margin:0;font-size:clamp(2rem,9vw,3rem);font-weight:600;overflow-wrap:anywhere}.flash-meaning-side{margin:auto 0}.flash-phonetic{margin:0 0 .75rem;color:var(--flash-muted);font-size:.95rem}.flash-senses{margin:0;padding:0;list-style:none;font-size:clamp(1.05rem,4.5vw,1.3rem);line-height:1.4}.flash-senses.numbered{padding-left:1.4em;list-style:decimal}.flash-senses li+li{margin-top:.9rem}.flash-meaning{margin:0}.flash-pos{color:var(--flash-muted);font-size:.85em}.flash-synonyms{margin:.25rem 0 0;color:var(--flash-muted);font-size:.85em}.flash-controls{display:flex;justify-content:center;align-items:center;gap:1.5rem;margin-top:1rem}.flash-btn{display:grid;place-items:center;width:4rem;height:4rem;border:2px solid;border-radius:50%;background:#fff;font-size:1.6rem;font-weight:700;cursor:pointer}.flash-btn.learning{color:var(--flash-learning);border-color:var(--flash-learning)}.flash-btn.know{color:var(--flash-know);border-color:var(--flash-know)}.flash-btn.undo{width:3rem;height:3rem;border-color:var(--flash-line);color:var(--flash-muted);font-size:1.3rem}.flash-btn:disabled{opacity:.4;cursor:default}.flash-btn.learning:active{background:var(--flash-learning-soft)}.flash-btn.know:active{background:var(--flash-know-soft)}.flash-options{display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem 1.5rem;margin-top:1rem;color:var(--flash-muted);font-size:.9rem}.flash-options label{display:inline-flex;align-items:center;gap:.35rem}.flash-keys{margin:.75rem 0 0;text-align:center;color:var(--flash-muted);font-size:.8rem}@media(hover:none){.flash-keys{display:none}}.flash-summary h1{margin:1rem 0;font-size:1.6rem}.flash-ring-row{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}.flash-ring{width:8rem;height:8rem}.flash-ring circle{fill:none;stroke-width:14}.ring-learning{stroke:var(--flash-learning)}.ring-know{stroke:var(--flash-know);transition:stroke-dasharray .4s ease}.flash-ring text{font-size:1.4rem;font-weight:700;fill:var(--flash-ink)}.flash-tally{margin:0;display:grid;gap:.5rem}.flash-tally div{display:flex;justify-content:space-between;gap:2rem;min-width:12rem;padding:.4rem .9rem;border-radius:999px;font-weight:600}.flash-tally dd{margin:0}.flash-tally .know{color:#0d7a54;background:var(--flash-know-soft)}.flash-tally .learning{color:#c2560f;background:var(--flash-learning-soft)}.flash-summary-actions{display:grid;gap:.6rem;margin:1.5rem 0}.flash-summary-actions button{min-height:3rem;border:2px solid var(--flash-line);border-radius:10px;background:#fff;color:var(--flash-ink);font:inherit;font-weight:600;cursor:pointer}.flash-summary-actions .primary{border-color:var(--flash-accent);background:var(--flash-accent);color:#fff}.flash-summary h2{font-size:1rem;margin:0 0 .5rem}.flash-review-list{margin:0;padding:0;list-style:none}.flash-review-list li{display:grid;gap:.15rem;padding:.7rem .9rem;border-radius:10px;background:#fff}.flash-review-list li+li{margin-top:.4rem}.flash-review-list span{color:var(--flash-muted)}@media(min-width:640px){.flash-summary-actions{grid-template-columns:repeat(3,1fr)}}@media(prefers-reduced-motion:reduce){.flash-card,.flash-inner,.flash-progress>div{transition:none;animation:none}}.flash-back{display:block;margin:-.75rem auto 1.5rem;padding:.4rem .8rem;border:0;background:none;color:var(--flash-accent);font:inherit;font-weight:600;cursor:pointer}