.elfc{--elfc-ink:#1a1a24;--elfc-bg:#ffffff;--elfc-card:#ffffff;--elfc-card-back:#f8f7fc;--elfc-line:#e7e6f0;--elfc-soft:#f3f2f8;--elfc-muted:#6b6a7b;--elfc-red:#e02b2b;--elfc-green:#0a8a3c;--elfc-blue:#0a66d0;--elfc-purple:#6a2cd4;--elfc-amber:#c06c00;--elfc-pink:#c2185b;--elfc-focus:#0a66d0;--elfc-box1:var(--elfc-purple);--elfc-box2:var(--elfc-green);--elfc-box3:var(--elfc-blue);--elfc-box4:var(--elfc-amber);--elfc-box5:var(--elfc-pink);--elfc-sh-sm:0 1px 2px rgba(26,26,44,.05), 0 2px 8px rgba(26,26,44,.05);--elfc-sh:0 2px 4px rgba(26,26,44,.04), 0 8px 24px rgba(26,26,44,.07);--elfc-sh-lg:0 4px 10px rgba(26,26,44,.05), 0 18px 46px rgba(26,26,44,.10);--elfc-radius:16px;--elfc-radius-lg:24px;color:var(--elfc-ink);background:var(--elfc-bg);border:1px solid var(--elfc-line);border-radius:var(--elfc-radius-lg);box-shadow:var(--elfc-sh);max-width:780px;margin:2.75rem auto;padding:2.25rem 2.25rem 3rem;box-sizing:border-box;line-height:1.6;-webkit-tap-highlight-color:#fff0}.elfc *,.elfc *::before,.elfc *::after{box-sizing:border-box;-webkit-tap-highlight-color:#fff0}.elfc :where(p){margin:0}.elfc button,.elfc input{font-family:inherit}.elfc-header{display:flex;align-items:baseline;justify-content:flex-start;gap:.75rem;flex-wrap:wrap;margin-bottom:1.5rem}.elfc-header h2{font-size:1.3rem;font-weight:800;letter-spacing:-.01em;margin:0;padding:0;border:none;background:none;color:var(--elfc-ink)}.elfc-total{font-size:.95rem;font-weight:600;color:var(--elfc-muted)}.elfc-tabs{display:inline-flex;gap:.35rem;margin-bottom:1.85rem;background:var(--elfc-soft);padding:.35rem;border-radius:var(--elfc-radius)}.elfc-tab-btn{background:#fff0;border:none;cursor:pointer;padding:.6rem 1.25rem;border-radius:calc(var(--elfc-radius) - 5px);font-size:1rem;font-weight:600;color:var(--elfc-muted);transition:background .16s,color .16s,box-shadow .16s}.elfc-tab-btn.is-active{background:var(--elfc-card);color:var(--elfc-ink);font-weight:700;box-shadow:var(--elfc-sh-sm)}.elfc-tab-btn:hover:not(.is-active){color:var(--elfc-ink)}.elfc-tab-btn:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:2px}.elfc-panel{display:none}.elfc-panel.is-active{display:block}.elfc-study{text-align:center}.elfc-box-rail{display:flex;gap:.8rem;margin-bottom:2rem;flex-wrap:wrap;justify-content:center}.elfc-chip{display:flex;flex-direction:column;align-items:center;gap:.15rem;border:none;border-radius:var(--elfc-radius);background:var(--elfc-soft);color:var(--elfc-ink);padding:.85rem 1.3rem;min-width:96px;cursor:pointer;font-size:.88rem;font-weight:600;letter-spacing:.01em;box-shadow:var(--elfc-sh-sm);transition:box-shadow .18s,filter .18s}.elfc-chip:hover{box-shadow:var(--elfc-sh);filter:brightness(1.05)}.elfc-chip:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:3px}.elfc-chip-count{font-size:1.7rem;font-weight:800;line-height:1.15}.elfc-chip-due{background:var(--elfc-blue);color:#fff;box-shadow:0 2px 6px rgb(10 102 208 / .22),0 8px 22px rgb(10 102 208 / .20)}.elfc-chip-b1{background:var(--elfc-box1);color:#fff;box-shadow:0 2px 6px rgb(106 44 212 / .22),0 8px 22px rgb(106 44 212 / .20)}.elfc-chip-b2{background:var(--elfc-box2);color:#fff;box-shadow:0 2px 6px rgb(10 138 60 / .22),0 8px 22px rgb(10 138 60 / .20)}.elfc-chip-b3{background:var(--elfc-box3);color:#fff;box-shadow:0 2px 6px rgb(10 102 208 / .22),0 8px 22px rgb(10 102 208 / .20)}.elfc-chip-b4{background:var(--elfc-box4);color:#fff;box-shadow:0 2px 6px rgb(192 108 0 / .22),0 8px 22px rgb(192 108 0 / .20)}.elfc-chip-b5{background:var(--elfc-box5);color:#fff;box-shadow:0 2px 6px rgb(194 24 91 / .22),0 8px 22px rgb(194 24 91 / .20)}.elfc-chip.is-active{outline:2px solid rgb(26 26 36 / .42);outline-offset:3px}.elfc-session-bar{max-width:540px;margin:0 auto 1.15rem;height:8px;background:var(--elfc-soft);border-radius:999px;overflow:hidden}.elfc-session-fill{height:100%;background:var(--elfc-blue);border-radius:999px;transition:width .35s}.elfc-meta{font-size:1rem;font-weight:600;color:var(--elfc-muted);margin-bottom:2.5rem}.elfc-card{perspective:1500px;width:100%;max-width:540px;min-height:310px;margin:0 auto 1.85rem;cursor:pointer;background:none;border:none;padding:0;display:block;-webkit-tap-highlight-color:#fff0}.elfc-card:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:8px;border-radius:var(--elfc-radius-lg)}.elfc-card-inner{display:grid;grid-template-areas:"face";width:100%;min-height:310px;position:relative;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.32,.72,.35,1)}.elfc-card.is-flipped .elfc-card-inner{transform:rotateY(180deg)}.elfc-face{grid-area:face;border:1px solid var(--elfc-line);border-radius:var(--elfc-radius-lg);backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem 2.5rem;text-align:center;box-shadow:var(--elfc-sh-lg)}.elfc-face-front{background:var(--elfc-card)}.elfc-face-back{background:var(--elfc-card-back);transform:rotateY(180deg)}.elfc-def{font-size:1.25rem;font-weight:400;line-height:1.65;max-width:28ch;color:var(--elfc-ink)}.elfc-word{font-size:2.35rem;font-weight:800;line-height:1.2;letter-spacing:-.02em}.elfc-pos{font-size:1rem;font-weight:500;font-style:italic;color:var(--elfc-muted);margin-top:.5rem}.elfc-audio{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;margin-top:1.85rem;padding:.7rem 1.5rem;border:1px solid var(--elfc-line);border-radius:999px;background:var(--elfc-card);cursor:pointer;font-size:1rem;font-weight:600;color:var(--elfc-ink);box-shadow:var(--elfc-sh-sm);transition:background .16s,color .16s,box-shadow .16s,border-color .16s}.elfc-audio:hover{background:var(--elfc-ink);border-color:var(--elfc-ink);color:#fff;box-shadow:var(--elfc-sh)}.elfc-audio:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:3px}.elfc-audio svg{width:17px;height:17px;flex:none;fill:currentColor}.elfc-audio.is-playing{background:var(--elfc-blue);border-color:var(--elfc-blue);color:#fff;box-shadow:0 2px 6px rgb(10 102 208 / .24),0 8px 22px rgb(10 102 208 / .22)}.elfc-audio.is-error{background:var(--elfc-card);border-color:var(--elfc-red);color:var(--elfc-red)}@keyframes elfc-pulse{0%,100%{opacity:1}50%{opacity:.62}}.elfc-audio.is-playing{animation:elfc-pulse 1s ease-in-out infinite}.elfc-answers{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap;min-height:54px;transition:opacity .2s}.elfc-answers.is-hidden{visibility:hidden;opacity:0;pointer-events:none}.elfc-btn{display:inline-block;border:1px solid var(--elfc-line);border-radius:999px;padding:.8rem 1.75rem;font-size:1.05rem;font-weight:600;cursor:pointer;background:var(--elfc-card);color:var(--elfc-ink);box-shadow:var(--elfc-sh-sm);transition:box-shadow .18s,filter .18s,background .16s,color .16s;text-decoration:none;line-height:1.25}.elfc-btn:hover{box-shadow:var(--elfc-sh);filter:brightness(1.04)}.elfc-btn:active{box-shadow:var(--elfc-sh-sm);filter:brightness(.97)}.elfc-btn:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:3px}.elfc-btn-outline{background:#fff0;box-shadow:none}.elfc-btn-outline:hover{background:var(--elfc-soft);box-shadow:var(--elfc-sh-sm);filter:none}.elfc-btn-sm{font-size:.92rem;padding:.55rem 1.2rem}.elfc-btn-wrong{background:var(--elfc-red);border-color:var(--elfc-red);color:#fff;font-weight:700;box-shadow:0 2px 6px rgb(224 43 43 / .26),0 10px 26px rgb(224 43 43 / .24)}.elfc-btn-wrong:hover{color:#fff;box-shadow:0 3px 8px rgb(224 43 43 / .30),0 14px 34px rgb(224 43 43 / .30)}.elfc-btn-right{background:var(--elfc-green);border-color:var(--elfc-green);color:#fff;font-weight:700;box-shadow:0 2px 6px rgb(10 138 60 / .26),0 10px 26px rgb(10 138 60 / .24)}.elfc-btn-right:hover{color:#fff;box-shadow:0 3px 8px rgb(10 138 60 / .30),0 14px 34px rgb(10 138 60 / .30)}.elfc-empty{border:1px solid var(--elfc-line);border-radius:var(--elfc-radius-lg);padding:3rem 2rem;text-align:center;color:var(--elfc-muted);font-size:1.05rem;font-weight:400;line-height:1.75;background:var(--elfc-card);box-shadow:var(--elfc-sh-sm)}.elfc-empty strong{color:var(--elfc-ink);font-weight:700}.elfc-empty .elfc-btn{margin-top:.75rem}.elfc-done{padding:3.25rem 2rem;box-shadow:var(--elfc-sh)}.elfc-done-mark{display:block;width:64px;height:64px;margin:0 auto 1.35rem;border-radius:50%;background:var(--elfc-green);color:#fff;font-size:1.9rem;font-weight:700;line-height:64px;text-align:center;box-shadow:0 3px 8px rgb(10 138 60 / .24),0 12px 30px rgb(10 138 60 / .26)}.elfc-done-title{font-size:1.45rem;font-weight:700;color:var(--elfc-ink)}.elfc-done-sub{font-size:1.02rem;font-weight:400;color:var(--elfc-muted);margin-top:.5rem;margin-bottom:1.85rem}.elfc-list-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.35rem;flex-wrap:wrap;gap:.8rem}.elfc-list-head h3{font-size:1.25rem;font-weight:700;margin:0;padding:0;border:none;background:none;color:var(--elfc-ink)}.elfc-search{width:100%;font-size:1.02rem;font-weight:400;border:1px solid var(--elfc-line);border-radius:var(--elfc-radius);background:var(--elfc-card);color:var(--elfc-ink);padding:.8rem 1.1rem;margin-bottom:1.25rem;box-shadow:var(--elfc-sh-sm)}.elfc-search:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:2px}.elfc-filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.25rem}.elfc-filter{border:1px solid var(--elfc-line);border-radius:999px;padding:.45rem 1.1rem;font-size:.95rem;font-weight:600;cursor:pointer;background:var(--elfc-card);color:var(--elfc-muted);box-shadow:var(--elfc-sh-sm);transition:background .16s,color .16s,box-shadow .16s}.elfc-filter:hover{color:var(--elfc-ink);box-shadow:var(--elfc-sh)}.elfc-filter.is-on{background:var(--elfc-ink);border-color:var(--elfc-ink);color:#fff}.elfc-filter:focus-visible{outline:3px solid var(--elfc-focus);outline-offset:3px}.elfc-rows{display:flex;flex-direction:column;gap:.7rem}.elfc-row{display:grid;grid-template-columns:minmax(100px,.75fr) 1fr auto;align-items:center;gap:1rem;border:1px solid var(--elfc-line);border-radius:var(--elfc-radius);padding:1rem 1.25rem;background:var(--elfc-card);box-shadow:var(--elfc-sh-sm)}.elfc-row-word{font-size:1.1rem;font-weight:700}.elfc-row-word em{font-size:.9rem;font-weight:400;color:var(--elfc-muted)}.elfc-row-def{font-size:1rem;font-weight:400;color:var(--elfc-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.elfc-badge{font-size:.82rem;font-weight:600;color:#fff;padding:.34rem .9rem;border-radius:999px;border:none;white-space:nowrap}.elfc-prog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:2.5rem}.elfc-prog-box{border:none;border-radius:var(--elfc-radius-lg);padding:1.85rem .85rem;text-align:center;color:#fff}.elfc-prog-box.elfc-chip-b1{background:var(--elfc-box1);box-shadow:0 3px 8px rgb(106 44 212 / .20),0 12px 30px rgb(106 44 212 / .20)}.elfc-prog-box.elfc-chip-b2{background:var(--elfc-box2);box-shadow:0 3px 8px rgb(10 138 60 / .20),0 12px 30px rgb(10 138 60 / .20)}.elfc-prog-box.elfc-chip-b3{background:var(--elfc-box3);box-shadow:0 3px 8px rgb(10 102 208 / .20),0 12px 30px rgb(10 102 208 / .20)}.elfc-prog-box.elfc-chip-b4{background:var(--elfc-box4);box-shadow:0 3px 8px rgb(192 108 0 / .20),0 12px 30px rgb(192 108 0 / .20)}.elfc-prog-box.elfc-chip-b5{background:var(--elfc-box5);box-shadow:0 3px 8px rgb(194 24 91 / .20),0 12px 30px rgb(194 24 91 / .20)}.elfc-prog-num{font-size:2.3rem;font-weight:800;line-height:1}.elfc-prog-label{font-size:.92rem;font-weight:600;margin-top:.5rem;opacity:.94}.elfc-bar-wrap{height:14px;background:var(--elfc-soft);border-radius:999px;overflow:hidden;margin-bottom:.65rem}.elfc-bar{height:100%;background:var(--elfc-green);border-radius:999px;transition:width .5s}.elfc-bar-head{font-size:1.05rem;font-weight:700;margin-bottom:.65rem}.elfc-bar-stat{font-size:.98rem;font-weight:500;color:var(--elfc-muted);text-align:right}.elfc-prog-note{font-size:1rem;font-weight:500;color:var(--elfc-muted);margin-top:1.5rem}.elfc-prog-done{font-size:1.02rem;font-weight:500;color:var(--elfc-ink);margin-top:1.5rem;background:var(--elfc-card);border:1px solid var(--elfc-line);border-radius:var(--elfc-radius);padding:1.15rem 1.35rem;line-height:1.7;box-shadow:var(--elfc-sh-sm)}.elfc-toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(70px);background:#1a1a24;color:#fff;padding:.9rem 1.6rem;border-radius:999px;font-size:1rem;font-weight:600;box-shadow:0 6px 18px rgb(26 26 44 / .22),0 18px 48px rgb(26 26 44 / .26);opacity:0;transition:opacity .25s,transform .25s;pointer-events:none;white-space:nowrap;z-index:99999}.elfc-toast.is-visible{opacity:1;transform:translateX(-50%) translateY(0)}.elfc-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}@media (max-width:640px){.elfc{margin:1.25rem auto;padding:1.5rem 1.15rem 2.25rem;border-radius:var(--elfc-radius-lg)}.elfc-header{margin-bottom:1.15rem}.elfc-total{font-size:1.02rem}.elfc-tabs{display:flex;width:100%;margin-bottom:1.5rem}.elfc-tab-btn{flex:1;padding:.65rem .3rem;font-size:1rem}.elfc-box-rail{gap:.6rem;margin-bottom:1.6rem}.elfc-chip{flex:1;min-width:0;padding:.8rem .4rem;font-size:.9rem}.elfc-chip-count{font-size:1.7rem}.elfc-meta{font-size:1.05rem;margin-bottom:2rem}.elfc-card{margin-bottom:1.5rem}.elfc-card,.elfc-card-inner{min-height:275px}.elfc-face{padding:2.25rem 1.5rem}.elfc-def{font-size:1.16rem;max-width:none}.elfc-word{font-size:2rem}.elfc-pos{font-size:1rem}.elfc-btn{padding:.85rem 1.5rem;font-size:1.05rem}.elfc-btn-sm{font-size:.95rem;padding:.6rem 1.15rem}.elfc-answers{gap:.75rem;min-height:58px}.elfc-list-head h3{font-size:1.2rem}.elfc-search{font-size:1.08rem;padding:.85rem 1.1rem}.elfc-filter{font-size:1rem;padding:.5rem 1.1rem}.elfc-row{grid-template-columns:1fr auto;row-gap:.55rem;padding:1.05rem 1.15rem}.elfc-row-word{grid-row:1;grid-column:1;font-size:1.22rem}.elfc-row-word em{font-size:1rem}.elfc-badge{grid-row:1;grid-column:2;justify-self:end;font-size:.92rem;padding:.34rem .85rem}.elfc-row-def{grid-row:2;grid-column:1 / -1;white-space:normal;font-size:1.08rem;line-height:1.55}.elfc-prog-grid{gap:.75rem}.elfc-prog-box{padding:1.5rem .6rem}.elfc-prog-num{font-size:2rem}.elfc-prog-label{font-size:.95rem}.elfc-bar-stat{font-size:1rem}.elfc-prog-note,.elfc-prog-done{font-size:1.02rem}.elfc-done-title{font-size:1.3rem}.elfc-done-sub{font-size:1.02rem}.elfc-empty{font-size:1.05rem;padding:2.5rem 1.4rem}}@media (prefers-reduced-motion:reduce){.elfc-card-inner,.elfc-btn,.elfc-bar,.elfc-session-fill,.elfc-audio,.elfc-chip,.elfc-answers,.elfc-tab-btn,.elfc-filter{transition:none}.elfc-audio.is-playing{animation:none}}