:root{--ink: #16223A;--muted: #56657F;--accent: #1E5FCB;--accent-strong: #16407F;--amber: #D98A2B;--good: #0E8F63;--bad: #D43C45;--glass: rgba(255, 255, 255, .55);--glass-strong: rgba(255, 255, 255, .72);--glass-dim: rgba(255, 255, 255, .38);--hairline: rgba(255, 255, 255, .65);--hairline-ink: rgba(20, 42, 82, .08);--r-sm: 12px;--r-md: 18px;--r-lg: 24px;--r-pill: 999px;--shadow: 0 10px 34px rgba(20, 42, 82, .13);--shadow-soft: 0 4px 16px rgba(20, 42, 82, .1);--shadow-pop: 0 14px 40px rgba(20, 42, 82, .22);--blur: blur(22px) saturate(160%);--blur-strong: blur(26px) saturate(165%);--s-1: 4px;--s-2: 8px;--s-3: 12px;--s-4: 16px;--s-5: 24px;--s-6: 32px;--s-7: 48px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;--accent-tint: rgba(30, 95, 203, .12);--accent-tint-strong: rgba(30, 95, 203, .18);--amber-tint: rgba(217, 138, 43, .14);--good-tint: rgba(14, 143, 99, .12);--bad-tint: rgba(212, 60, 69, .1);--accent-grad: linear-gradient(150deg, var(--accent), #3e86e8)}*,*:before,*:after{box-sizing:border-box}html,body{min-height:100%}body{margin:0;font-family:var(--font);color:var(--ink);min-height:100vh;background:radial-gradient(40rem 28rem at 12% -6%,rgba(156,195,240,.55),transparent 60%),radial-gradient(34rem 26rem at 92% 6%,rgba(134,215,200,.5),transparent 60%),radial-gradient(46rem 34rem at 50% 116%,rgba(180,170,235,.4),transparent 60%),linear-gradient(180deg,#eaf2fb,#e8f3f0);background-attachment:fixed;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3{margin:0;letter-spacing:-.01em;font-weight:700}button{font-family:inherit;cursor:pointer}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.7rem;font-weight:700;color:var(--muted)}:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:6px}*:focus:not(:focus-visible){outline:none}@media (prefers-reduced-motion: 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ease}.btn:active{transform:scale(.97)}.btn--accent{background:var(--accent);border-color:transparent;color:#fff;box-shadow:var(--shadow-soft)}.top-bar{position:sticky;top:12px;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:var(--s-3);margin-top:14px;padding:11px 14px;background:var(--glass);border:1px solid var(--hairline);border-radius:var(--r-md);box-shadow:var(--shadow);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}.top-bar__brand{display:flex;align-items:center;gap:10px;min-width:0;font-weight:750;letter-spacing:-.01em;font-size:1.02rem}.brand-mark{width:26px;height:26px;border-radius:9px;flex:none;position:relative;background:var(--accent-grad);box-shadow:0 4px 12px #1e5fcb66}.brand-mark:after{content:"";position:absolute;top:7px;right:8px;bottom:7px;left:8px;border-left:2.5px solid #fff;border-bottom:2.5px solid #fff;border-radius:0 0 0 4px;opacity:.95}.level-toggle{display:inline-flex;gap:2px;padding:3px;border-radius:var(--r-sm);background:var(--glass);border:1px solid var(--hairline);flex:none;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.level-toggle__seg{border:none;background:transparent;color:var(--muted);font-weight:750;font-size:.8rem;padding:5px 11px;border-radius:10px;transition:background .18s ease,color .18s ease,box-shadow .18s ease}.level-toggle__seg.is-active{background:var(--accent-grad);color:#fff;box-shadow:0 4px 12px #1e5fcb52}.saved{position:relative;flex:none}.star-pill{display:flex;align-items:center;gap:7px;border:1px solid var(--hairline);background:var(--glass-strong);color:var(--ink);border-radius:var(--r-sm);padding:7px 12px;font-weight:650;font-size:.86rem;transition:transform .18s ease,box-shadow .18s ease}.star-pill:hover{box-shadow:0 6px 16px #142a521f}.star-pill.pulse{animation:star-pulse .5s ease}@keyframes star-pulse{0%{transform:scale(1)}40%{transform:scale(1.14)}to{transform:scale(1)}}.star-pill__icon{color:var(--amber);font-size:.95rem;line-height:1}.star-pill__count{min-width:10px;text-align:center}.saved-list{position:absolute;right:0;top:50px;width:250px;max-height:56vh;overflow:auto;padding:10px;border-radius:var(--r-md);border:1px solid var(--hairline);background:var(--glass-strong);box-shadow:var(--shadow);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);z-index:40;animation:drop-in .16s ease}@keyframes drop-in{0%{opacity:0;transform:translateY(-6px)}}.saved-list h4{margin:2px 4px 8px;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.saved-empty{padding:10px 8px;color:var(--muted);font-size:.86rem;line-height:1.5}.saved-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:7px 8px;border-radius:9px}.saved-row:hover{background:var(--accent-tint)}.saved-row__lemma{border:none;background:transparent;padding:0;font-size:.9rem;font-weight:650;color:var(--ink);text-align:left;cursor:pointer}.saved-row__gloss{color:var(--muted);font-size:.82rem;flex:1;text-align:right}.saved-row__remove{border:none;background:transparent;color:var(--muted);font-size:.8rem;line-height:1;padding:2px 4px;opacity:0;transition:opacity .15s ease,color .15s ease}.saved-row:hover .saved-row__remove{opacity:1}.saved-row__remove:hover{color:var(--bad)}.chip-row{display:flex;gap:9px;overflow-x:auto;padding:18px 2px 4px;margin:0 -2px;scrollbar-width:none;-webkit-overflow-scrolling:touch}.chip-row::-webkit-scrollbar{display:none}.chip{flex:none;white-space:nowrap;padding:9px 15px;border-radius:var(--r-sm);font-weight:600;font-size:.9rem;border:1px solid var(--hairline);background:var(--glass);color:var(--ink);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease}.chip:hover{background:var(--glass-strong)}.chip--active{background:var(--accent-grad);color:#fff;border-color:transparent;box-shadow:0 7px 18px #1e5fcb57}.chip--ghost{color:var(--muted);border-style:dashed;border-color:#56657f66;background:transparent}.chip--ghost.chip--active{color:#fff;border-style:solid}.custom-topic{display:flex;gap:var(--s-2);margin-top:var(--s-3)}.custom-topic input{flex:1;border:1px solid var(--hairline);background:var(--glass-strong);border-radius:var(--r-sm);padding:10px 14px;font-size:.95rem;color:var(--ink);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}.custom-topic input::placeholder{color:var(--muted)}.tab-bar{position:fixed;left:0;right:0;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:40;width:min(560px,calc(100% - 32px));margin:0 auto;display:flex;justify-content:space-around;padding:8px;background:var(--glass-strong);border:1px solid var(--hairline);border-radius:20px;box-shadow:0 14px 40px #142a5233;-webkit-backdrop-filter:var(--blur-strong);backdrop-filter:var(--blur-strong)}.tab-bar__item{display:flex;flex-direction:column;align-items:center;gap:3px;border:none;background:transparent;color:var(--muted);font-size:.72rem;font-weight:650;padding:7px 14px;border-radius:var(--r-sm);transition:background .18s ease,color .18s ease}.tab-bar__item.is-active{color:var(--accent);background:var(--accent-tint)}.tab-bar__item:not(.is-active):hover{color:var(--ink)}.tab-bar__ic{font-size:1.18rem;line-height:1}.toast{position:fixed;left:50%;transform:translate(-50%);bottom:calc(92px + env(safe-area-inset-bottom,0px));z-index:60;max-width:80%;text-align:center;background:var(--glass-strong);color:var(--ink);font-size:.88rem;font-weight:560;padding:11px 17px;border:1px solid var(--hairline);border-radius:14px;box-shadow:var(--shadow);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);animation:toast-in .26s 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1px;margin:0;font:inherit;color:inherit;line-height:inherit;cursor:pointer;border-radius:5px;border-bottom:1.6px dotted rgba(30,95,203,.38);transition:background .15s ease,color .15s ease,border-color .15s ease}.word:hover{background:var(--accent-tint)}.word--active{background:var(--accent);color:#fff;border-bottom-color:transparent}.word--saved{background:var(--amber-tint);border-bottom:1.6px solid var(--amber)}.word--saved.word--active{background:var(--accent);color:#fff}.reader__foot{margin-top:16px;padding-top:13px;border-top:1px solid var(--hairline-ink);display:flex;align-items:center;justify-content:space-between;font-size:.82rem;color:var(--muted)}.reader__refresh{cursor:pointer;border:1px solid var(--hairline);background:var(--glass-strong);color:var(--accent);font-weight:650;font-size:.8rem;padding:6px 11px;border-radius:11px;display:inline-flex;align-items:center;gap:5px;transition:box-shadow .18s ease,transform .12s ease}.reader__refresh:hover{box-shadow:0 6px 14px #142a521f}.reader__refresh:active{transform:scale(.97)}.reader__refresh:disabled{opacity:.55}.reader__loading{color:var(--muted);padding:var(--s-4) 0}.word-pop{position:absolute;z-index:50;min-width:148px;max-width:230px;padding:13px 14px 12px;border-radius:15px;background:var(--glass-strong);border:1px solid var(--hairline);box-shadow:var(--shadow-pop);-webkit-backdrop-filter:var(--blur-strong);backdrop-filter:var(--blur-strong);animation:pop-in .16s ease}@keyframes pop-in{0%{opacity:0;transform:translateY(6px) scale(.96)}}.word-pop__head{font-weight:730;font-size:1.04rem;letter-spacing:-.01em;color:var(--ink)}.word-pop__body{color:var(--muted);font-size:.92rem;margin-top:2px}.word-pop__save{margin-top:11px;width:100%;cursor:pointer;font-weight:650;font-size:.84rem;padding:8px 10px;border-radius:11px;color:var(--amber);background:var(--amber-tint);border:1px solid rgba(217,138,43,.3);transition:background .18s ease,color .18s ease,border-color .18s ease}.word-pop__save:hover:not(:disabled){background:#d98a2b38}.word-pop__save.is-saved{color:var(--good);background:var(--good-tint);border-color:#0e8f634d}.word-pop__save:disabled{opacity:.55;cursor:default}.check-head{margin:26px 4px 12px;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700}.qcard{padding:17px 18px;margin-bottom:12px;background:var(--glass);border:1px solid var(--hairline);border-radius:var(--r-md);box-shadow:var(--shadow);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}.qcard__q{font-weight:620;font-size:1.02rem;margin:0 0 12px}.option{display:flex;align-items:center;gap:10px;width:100%;text-align:left;cursor:pointer;padding:11px 13px;margin-top:8px;border-radius:12px;border:1px solid rgba(20,42,82,.1);background:#fff6;font-size:.97rem;line-height:1.4;color:var(--ink);transition:background .18s ease,border-color .18s ease}.option:not(:disabled):hover{border-color:var(--accent);background:var(--accent-tint)}.option__dot{width:16px;height:16px;border-radius:50%;border:2px solid rgba(20,42,82,.25);flex:none;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}.option--correct{border-color:var(--good);background:var(--good-tint)}.option--correct .option__dot{border-color:var(--good);background:var(--good);box-shadow:inset 0 0 0 3px #ffffffd9}.option--wrong{border-color:var(--bad);background:var(--bad-tint)}.option--wrong .option__dot{border-color:var(--bad);background:var(--bad);box-shadow:inset 0 0 0 3px #ffffffd9}.option:disabled{cursor:default}.option--dim{opacity:.75}.qcard__explain{margin:11px 0 0;font-size:.9rem;color:var(--good);font-weight:560;line-height:1.5}@media (min-width: 640px){.passage{font-size:1.26rem}}.listen-mode{display:flex;flex-direction:column;gap:var(--s-4)}.set-list{margin-top:6px}.set-list__head{margin-bottom:var(--s-3)}.set-list__empty{color:var(--muted);line-height:1.6;margin:0}.set-list__items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--s-2)}.set-row{width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--s-3);padding:13px 15px;border:1px solid var(--hairline);background:var(--glass-strong);border-radius:var(--r-md);text-align:left;transition:border-color .18s ease,background .18s ease,transform .12s ease}.set-row:hover{border-color:var(--accent);background:var(--accent-tint)}.set-row:active{transform:scale(.99)}.set-row__main{display:flex;flex-direction:column;gap:3px;min-width:0}.set-row__title{font-weight:700;font-size:1rem}.set-row__meta{font-size:.78rem;color:var(--muted)}.set-row__go{color:var(--accent);font-size:1.1rem;flex:none}.exercise-card{margin-top:6px}.exercise-card__head{display:flex;align-items:center;gap:var(--s-3);margin-bottom:var(--s-4)}.player{display:flex;align-items:center;gap:var(--s-3)}.player--lg{margin-bottom:var(--s-4)}.player__play{width:64px;height:64px;border-radius:50%;border:none;background:var(--accent-grad);color:#fff;font-size:1.5rem;line-height:1;box-shadow:0 8px 20px #1e5fcb5c;transition:transform .12s ease}.player--sm .player__play{width:40px;height:40px;font-size:1rem}.player__play:active{transform:scale(.94)}.player__play:disabled{opacity:.5}.player__speed{border:1px solid var(--hairline);background:var(--glass);color:var(--muted);font-weight:700;font-size:.85rem;padding:7px 13px;border-radius:var(--r-pill);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);transition:color .18s ease,border-color .18s ease,background .18s ease}.player__speed.is-slow{color:var(--accent);border-color:var(--accent);background:var(--accent-tint)}.player__err{font-size:.8rem;color:var(--bad)}.dictation__bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--s-3)}.dictation__progress{font-size:.8rem;font-weight:700;color:var(--muted)}.dictation__input{width:100%;border:1px solid var(--hairline);background:var(--glass-strong);border-radius:var(--r-md);padding:13px 15px;font-size:1.1rem;font-family:inherit;line-height:1.6;color:var(--ink);resize:vertical;-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}.dictation__input::placeholder{color:var(--muted)}.dictation__actions{display:flex;gap:var(--s-2);margin-top:var(--s-3)}.dictation__result{display:flex;flex-direction:column;gap:var(--s-3)}.dictation__score{font-weight:800;font-size:1.05rem}.dictation__diff{font-size:1.12rem;line-height:1.8}.dtok--correct{color:var(--good)}.dtok--missed{color:var(--bad);text-decoration:underline wavy var(--bad);text-underline-offset:3px}.dictation__revealLabel{margin-top:var(--s-2)}.dictation__transcript .tappable__text{font-size:1.18rem;line-height:1.85;margin:0}.dictation--done{text-align:center;padding:var(--s-5) var(--s-3) var(--s-3)}.dictation__doneTitle{font-weight:700;font-size:1.05rem;margin:0 0 var(--s-2)}.dictation__doneScore{font-size:2rem;font-weight:800;color:var(--accent);margin:0 0 var(--s-2)}.dictation__doneHint{color:var(--muted);margin:0}.attribution{margin:var(--s-4) 0 0;padding-top:var(--s-3);border-top:1px solid var(--hairline-ink);font-size:.74rem;color:var(--muted);line-height:1.5}.tappable{position:relative}.challenge-pick__q{font-weight:700;font-size:1.02rem;margin:0 0 var(--s-3)}.challenge-pick__opts{display:flex;gap:var(--s-3)}.challenge-btn{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:3px;padding:15px;border:1px solid var(--hairline);background:var(--glass);border-radius:var(--r-md);text-align:left;transition:border-color .18s ease,background .18s ease,transform .12s ease}.challenge-btn:not(:disabled):hover{border-color:var(--accent);background:var(--accent-tint)}.challenge-btn:not(:disabled):active{transform:scale(.98)}.challenge-btn:disabled{opacity:.45}.challenge-btn__ic{font-size:1.4rem}.challenge-btn__t{font-weight:700;font-size:1rem}.challenge-btn__s{font-size:.78rem;color:var(--muted)}.comp{display:flex;flex-direction:column;gap:var(--s-3)}.comp__player{display:flex;align-items:center;gap:var(--s-3);flex-wrap:wrap}.comp__pos{font-size:.8rem;color:var(--muted);font-weight:700}.comp__hint,.comp__nofb{color:var(--muted);font-size:.9rem;margin:0;line-height:1.55}.dw__intro{margin-bottom:var(--s-3)}.dw__lead{font-weight:700;font-size:1.1rem;margin:2px 0 var(--s-2)}.dw__sub{margin:0;color:var(--muted);line-height:1.55;font-size:.9rem}.dw__loading,.dw__err{color:var(--muted);padding:var(--s-3) 0}.dw__err{color:var(--bad)}.dw__player{display:flex;align-items:center;gap:var(--s-3);margin:var(--s-3) 0;flex-wrap:wrap}.dw__nowTitle{font-weight:700;font-size:.92rem}.dw__list{list-style:none;margin:var(--s-2) 0 0;padding:0;display:flex;flex-direction:column}.dw__item{display:flex;align-items:center;justify-content:space-between;gap:var(--s-3);padding:11px 4px;border-top:1px solid var(--hairline-ink)}.dw__item.is-active{color:var(--accent)}.dw__play{flex:1;border:none;background:transparent;text-align:left;font-size:.9rem;font-weight:600;color:inherit;padding:0;min-width:0}.dw__transcript{flex:none;font-size:.78rem;color:var(--accent);text-decoration:none;font-weight:600;white-space:nowrap}.dw__transcript:hover{text-decoration:underline}