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0;border:none;margin-top:22px;padding:10px 12px;font-size:.8125rem;line-height:1.45}.add-quota-note{background:var(--warning-soft);max-width:320px;color:var(--warning-ink);border-radius:var(--radius-sm);text-align:center;margin-top:16px;padding:10px 14px;font-size:.875rem;font-weight:550;line-height:1.4}.add-quota-cta{width:100%;min-height:44px;font:inherit;color:inherit;text-align:left;text-underline-offset:3px;background:0 0;border:none;margin-top:4px;padding:0;font-weight:650;text-decoration:underline;display:block}.add-quota-note-spent{background:var(--error-soft);color:var(--error-ink)}.add-quota-note-review{text-align:left;max-width:none;margin:12px 20px 0}.growing-input{resize:none;appearance:none;font-family:inherit;line-height:1.35;display:block;overflow:hidden}.nothing-screen{-webkit-overflow-scrolling:touch;height:100%;padding:0 var(--screen-pad);flex-direction:column;justify-content:safe 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(prefers-reduced-motion:reduce){.earned-badge{animation:none}}.lesson-rewards{flex-direction:column;align-items:center;gap:10px;width:100%;max-width:320px;margin-bottom:28px;display:flex}.lesson-xp{letter-spacing:-.2px;color:var(--accent);font-size:1.0625rem;font-weight:640;animation:.34s .2s both lesson-xp-in}@keyframes lesson-xp-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.lesson-rewards .earned-badge{width:100%;margin-bottom:0}@media (prefers-reduced-motion:reduce){.lesson-xp{animation:none}}.match-screen{height:100%;padding:calc(var(--safe-top) + 12px) var(--screen-pad) calc(var(--safe-bottom) + 20px);flex-direction:column;display:flex}.match-topbar{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.match-progress{color:var(--text-secondary);font-size:.875rem;font-weight:590}.match-title{letter-spacing:-.3px;text-align:center;margin:6px 0 18px;font-size:1.125rem;font-weight:650}.match-grid{grid-template-columns:1fr 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.15s}.match-tile.picked{border-color:var(--accent);transform:scale(.97)}.match-tile.matched{background:var(--success-soft);border-color:var(--success);color:var(--success-ink);transform:scale(.97)}.match-tile.wrong{border-color:var(--error);animation:.3s match-shake}@keyframes match-shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@media (prefers-reduced-motion:reduce){.match-tile.wrong{animation:none}.match-line{opacity:0;animation:none}}.summary-emoji-wrap{display:inline-block;position:relative}.match-confetti{pointer-events:none;width:0;height:0;position:absolute;top:50%;left:50%}.match-confetti-piece{opacity:0;width:8px;height:8px;animation:match-confetti-burst .75s ease-out var(--delay,0s) forwards;border-radius:50%;position:absolute;top:0;left:0}@keyframes match-confetti-burst{0%{opacity:1;transform:rotate(var(--angle)) translateY(0) scale(1)}to{opacity:0;transform:rotate(var(--angle)) translateY(-64px) scale(.4)}}@media 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16px;font-size:max(21px,1.3125rem)}.match-grid{gap:14px}}.memorize-screen{flex-direction:column;height:100%;display:flex}.progress-track{background:var(--surface);border-radius:100px;flex:1;height:6px;margin:0 16px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:100px;height:100%;transition:width .4s cubic-bezier(.32,.72,0,1)}.counter{color:var(--text-secondary);letter-spacing:-.2px;text-align:right;flex-shrink:0;min-width:44px;font-size:.9375rem;font-weight:590}.stage{padding:8px var(--screen-pad) 24px;perspective:1600px;touch-action:pan-y;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;min-height:0;display:flex}.mem-card{width:100%;max-width:380px;height:min(480px,58vh);transform-style:preserve-3d;cursor:pointer;transition:transform .62s cubic-bezier(.34,1.15,.64,1);position:relative}.mem-card-hit{border-radius:var(--radius-lg);appearance:none;font:inherit;color:inherit;cursor:pointer;background:0 0;border:none;padding:0;position:absolute;inset:0}.mem-card.flipped{transform:rotateY(180deg)}.mem-card.swipe-right{box-shadow:0 0 0 4px var(--success), var(--shadow-card)}.mem-card.swipe-left{box-shadow:0 0 0 4px var(--error), var(--shadow-card)}.mem-card.swipe-right,.mem-card.swipe-left{transition:box-shadow .15s,transform .62s cubic-bezier(.34,1.15,.64,1)}.mem-card-face{backface-visibility:hidden;border-radius:var(--radius-lg);box-shadow:var(--shadow-card);flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:32px 28px;display:flex;position:absolute;inset:0;overflow:hidden}.mem-card-front{background:var(--surface)}.mem-card-back{background:var(--bg);border:1px solid var(--border);transform:rotateY(180deg)}.mem-card-image-wrap{flex:1;justify-content:center;align-items:center;width:100%;min-height:0;display:flex}.mem-card-image-wrap-back{flex:none;max-height:40%}.mem-card-emoji{-webkit-user-select:none;user-select:none;font-size:clamp(56px,5.625rem,110px);line-height:1}.mem-card-image{object-fit:contain;border-radius:var(--radius-sm);max-width:100%;max-height:100%}.mem-card-word{overflow-wrap:anywhere;-webkit-hyphens:auto;hyphens:auto;letter-spacing:-1px;text-align:center;flex-shrink:0;font-size:clamp(22px,8.5vw,36px);font-weight:700;line-height:1.1}.tap-hint{color:var(--text-secondary);letter-spacing:-.1px;flex-shrink:0;font-size:.8125rem;font-weight:590}.tap-hint.hidden{opacity:0;visibility:hidden}.word-en{overflow-wrap:anywhere;-webkit-hyphens:auto;hyphens:auto;letter-spacing:-1.1px;color:var(--text-primary);text-align:center;font-size:clamp(24px,9.5vw,40px);font-weight:700;line-height:1.05}.sound-btn{background:var(--accent-soft);width:52px;height:52px;color:var(--accent);border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.sound-btn svg{width:22px;height:22px}.mem-card-back .sound-btn{position:relative;top:14%}.actions{padding:0 var(--screen-pad) calc(var(--safe-bottom) + 20px);flex-shrink:0;gap:12px;display:flex}.actions.hidden{opacity:0;visibility:hidden;pointer-events:none}.action-btn{border-radius:var(--radius-md);letter-spacing:-.3px;border:none;flex:1;justify-content:center;align-items:center;gap:8px;min-height:58px;font-size:1.0625rem;font-weight:590;transition:transform .15s;display:flex}.action-btn:active{transform:scale(.96)}.btn-again{background:var(--error-soft);color:var(--error-ink)}.btn-know{background:var(--success-soft);color:var(--success-ink)}.direction-picker{height:100%;padding:0 var(--screen-pad);flex-direction:column;display:flex;position:relative}.direction-close{top:calc(var(--safe-top) + 14px);left:var(--screen-pad);position:absolute}.direction-title{letter-spacing:-.6px;text-align:center;margin-top:auto;margin-bottom:10px;font-size:clamp(26px,1.625rem,40px);font-weight:700}.direction-sub{color:var(--text-secondary);text-align:center;margin-bottom:32px;font-size:.9375rem}.direction-options{flex-direction:column;gap:12px;margin-bottom:auto;padding-bottom:40px;display:flex}.direction-card{background:var(--surface);border-radius:var(--radius-md);text-align:left;border:none;padding:22px 20px;transition:transform .15s}.direction-card:active{transform:scale(.98)}.direction-card-main{letter-spacing:-.4px;color:var(--accent);margin-bottom:4px;font-size:1.25rem;font-weight:700}.direction-card-sub{color:var(--text-secondary);font-size:.875rem;font-weight:500}.summary-screen{-webkit-overflow-scrolling:touch;height:100%;padding:calc(var(--safe-top) + 24px) var(--screen-pad) calc(var(--safe-bottom) + 24px);text-align:center;flex-direction:column;justify-content:safe center;align-items:center;display:flex;position:relative;overflow-y:auto}.summary-emoji{margin-bottom:16px;font-size:clamp(40px,4rem,80px)}.summary-title{letter-spacing:-1px;margin-bottom:10px;font-size:clamp(40px,2.5rem,62px);font-weight:700}.summary-phrase{color:var(--text-secondary);max-width:280px;margin-bottom:36px;font-size:1rem;font-weight:550}.summary-actions{flex-direction:column;gap:10px;width:100%;max-width:320px;display:flex}.swipe-hint{justify-content:space-between;width:100%;max-width:380px;padding:0 8px;display:flex}.swipe-hint.hidden{opacity:0;visibility:hidden;pointer-events:none}.swipe-hint-left,.swipe-hint-right{letter-spacing:-.1px;font-size:.8125rem;font-weight:590}.swipe-hint-left{color:var(--error-ink)}.swipe-hint-right{color:var(--success-ink)}@media (width>=600px){.mem-card{max-width:480px;height:min(600px,56vh)}.mem-card-word{font-size:clamp(22px,8.5vw,46px)}.word-en{font-size:clamp(24px,9.5vw,52px)}.mem-card-emoji{font-size:clamp(56px,12vh,150px)}}.spelling-screen{flex-direction:column;height:100%;display:flex}.spelling-body{padding:12px var(--screen-pad) 8px;touch-action:pan-y;flex-direction:column;flex:1;align-items:center;min-height:0;display:flex;overflow-y:auto}.spelling-image-wrap{aspect-ratio:1.4;background:var(--surface);border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:100%;max-width:280px;margin-bottom:14px;display:flex;position:relative}.spelling-image-wrap-empty{aspect-ratio:auto;background:0 0;justify-content:flex-end;height:52px}.spelling-image-wrap-empty .spelling-sound-btn{position:static}.spelling-emoji{-webkit-user-select:none;user-select:none;font-size:clamp(48px,4.75rem,96px);line-height:1}.spelling-image{object-fit:contain;max-width:78%;max-height:78%}.spelling-sound-btn{width:42px;height:42px;position:absolute;bottom:10px;right:10px}.spelling-sound-btn svg{width:18px;height:18px}.spelling-translation{overflow-wrap:anywhere;color:var(--text-secondary);letter-spacing:-.3px;flex-shrink:0;margin-bottom:20px;font-size:1.25rem;font-weight:650}.letter-slots{flex-wrap:wrap;flex-shrink:0;justify-content:center;align-items:center;gap:8px 6px;margin-bottom:8px;display:flex}.letter-slot-group{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.letter-slot-item{position:relative}.letter-slot-item.wrap-hyphen:after{content:"-";color:var(--text-secondary);font-weight:700;position:absolute;bottom:2px;right:-7px}.letter-slot-tail{flex-shrink:0;align-items:center;gap:6px;display:flex}.letter-slot-space{flex-shrink:0;width:22px;height:46px;position:relative}.letter-slot-space:after{content:"";background:var(--border);border-radius:2px;height:2px;position:absolute;bottom:11px;left:3px;right:3px}.letter-slot-fixed{min-width:12px;height:46px;color:var(--text-secondary);-webkit-user-select:none;user-select:none;justify-content:center;align-items:flex-end;padding-bottom:8px;font-size:1.25rem;font-weight:700;display:flex}.letter-slot{border:2px solid var(--border-strong);background:var(--surface);min-width:38px;min-height:46px;color:var(--text-primary);border-radius:10px;justify-content:center;align-items:center;padding:0 4px;font-size:1.25rem;font-weight:700;transition:transform .1s,border-color .15s;display:flex}.letter-slot.filled{border-color:var(--accent);background:var(--accent-soft)}.letter-slot.slot-correct{border-color:var(--success);background:var(--success-soft);color:var(--success-ink)}.letter-slot.slot-wrong{border-color:var(--error);background:var(--error-soft);color:var(--error-ink)}.letter-slot:active:not(:disabled){transform:scale(.92)}.letter-slot,.letter-tile{position:relative}.letter-slot:after,.letter-tile:after{content:"";height:max(100%,44px);position:absolute;top:50%;transform:translateY(-50%)}.letter-slot:after{left:-3px;right:-3px}.letter-tile:after{left:-4px;right:-4px}.letter-slots.compact .letter-slot{border-radius:8px;width:29px;min-width:29px;height:37px;font-size:1.0625rem}.letter-slots.compact .letter-slot-tail{gap:4px}.letter-slots.compact .letter-slot-space,.letter-slots.compact .letter-slot-fixed{height:37px}.letter-slots.compact .letter-slot-space{width:17px}.letter-slots.compact .letter-slot-space:after{bottom:9px}.letter-slots.compact .letter-slot-fixed{padding-bottom:6px;font-size:1.0625rem}.letter-bank.compact .letter-tile{min-width:38px;min-height:44px;font-size:1.125rem}.answer-reveal{color:var(--error-ink);flex-shrink:0;margin-bottom:8px;font-size:.875rem;font-weight:550}.answer-reveal strong{letter-spacing:.5px}.letter-bank{flex-direction:column;gap:8px;margin-top:20px;padding-bottom:12px;display:flex}.letter-bank-row{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.letter-tile{background:var(--surface);min-width:44px;min-height:50px;color:var(--text-primary);border:none;border-radius:12px;padding:0 6px;font-size:1.25rem;font-weight:700;transition:transform .15s,background .12s,opacity .15s}.letter-tile:active{background:var(--surface-hover);transform:scale(.9)}.letter-tile.used{opacity:0;pointer-events:none;transform:scale(.85)}.spelling-actions{padding:12px var(--screen-pad) calc(var(--safe-bottom) + 20px);flex-shrink:0}.summary-sub-line{color:var(--text-secondary);margin-top:-4px;margin-bottom:20px;font-size:.875rem;font-weight:550}@media (width>=600px){.letter-slot{border-radius:14px;min-width:55px;min-height:66px;font-size:1.75rem}.letter-tile{border-radius:16px;min-width:64px;min-height:72px;font-size:1.75rem}.letter-slots.compact .letter-slot{width:42px;min-width:42px;height:54px;font-size:1.5rem}.letter-slots.compact .letter-slot-space,.letter-slots.compact .letter-slot-fixed{height:54px}.letter-slots.compact .letter-slot-fixed{font-size:1.5rem}.letter-bank.compact .letter-tile{min-width:55px;min-height:64px;font-size:1.5rem}.spelling-image-wrap{max-width:400px}.spelling-emoji{font-size:clamp(72px,9vh,132px)}.spelling-sound-btn{width:54px;height:54px}.spelling-sound-btn svg{width:23px;height:23px}.spelling-translation{font-size:1.5rem}}.choice-screen{height:100%;padding:calc(var(--safe-top) + 12px) var(--screen-pad) calc(var(--safe-bottom) + 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.15s}.choice-option:disabled{opacity:1}.choice-option.correct{background:var(--success-soft);border-color:var(--success);color:var(--success-ink)}.choice-option.wrong{background:var(--error-soft);border-color:var(--error);color:var(--error-ink);animation:.3s choice-shake}@keyframes choice-shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@media (prefers-reduced-motion:reduce){.choice-option.wrong{animation:none}}.choice-continue{margin-top:12px}.listening-play-wrap{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:24px 8px;display:flex}.listening-play-btn{background:var(--accent-soft);width:96px;height:96px;color:var(--accent);border:none;border-radius:50%;justify-content:center;align-items:center;transition:transform .12s,background-color 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