@charset "UTF-8";
:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#18382f;background:#f5f7f4;font-synthesis:none;--green:#173e35;--lime:#d7ed96;--muted:#66776c;--border:#dce3da;--paper:#fff;--read-size:25px}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,.file-button{min-height:46px;padding:11px 19px;border:0;border-radius:12px;background:var(--green);color:#fff;font-weight:600;cursor:pointer;touch-action:manipulation}button:hover{filter:brightness(1.08)}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #6e8d28;outline-offset:4px}.quiet{background:#eaf0e6;color:var(--green)}header{height:90px;padding:0 max(28px,calc((100vw - 1152px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:var(--paper);gap:16px}.brand{display:flex;align-items:center;gap:12px;background:none;color:var(--green);padding:0;font-size:23px;white-space:nowrap}.brand i{font-family:Georgia,serif;font-weight:400}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--green);color:var(--lime);font-family:Georgia,serif;font-size:28px}.header-actions{display:flex;align-items:center;gap:18px}#offline{font-size:13px;color:var(--muted)}main{max-width:1152px;margin:auto;padding:42px 28px 64px}.eyebrow{display:block;font-size:12px;font-weight:700;letter-spacing:2px;color:#698151;margin-bottom:12px}h1{font-size:34px;letter-spacing:-1px;margin:0 0 10px}h2{margin:8px 0 16px;font-size:25px}.intro{color:var(--muted);margin:0;line-height:1.6}.library-top{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:28px}.counter{font-size:15px;white-space:nowrap;color:var(--muted)}.continue{padding:25px 28px;border-radius:22px;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:22px;margin-bottom:32px}.continue .eyebrow{color:var(--lime)}.continue h2{margin:0 0 8px}.continue p{margin:0;color:#bcd1c6;font-size:14px}.continue button{background:var(--lime);color:var(--green);flex-shrink:0}.tabs{display:flex;gap:8px;margin:0 0 24px;flex-wrap:wrap}.tabs button{background:none;color:var(--muted);border-radius:99px;font-size:14px;padding:9px 18px;min-height:42px}.tabs .selected{background:#dfead4;color:var(--green)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.book{border:1px solid var(--border);border-radius:20px;overflow:hidden;background:var(--paper);text-align:left;color:var(--green);padding:0;font-weight:400;display:flex;flex-direction:column;min-height:300px}.cover{background:linear-gradient(135deg,#234c3b,#437353);color:#f4f8ec;min-height:160px;padding:23px;position:relative;display:flex;flex-direction:column;justify-content:space-between;width:100%}.book:nth-child(3n+2) .cover{background:linear-gradient(135deg,#273f63,#527d8c)}.book:nth-child(3n) .cover{background:linear-gradient(135deg,#5d3e2b,#977c4e)}.cover-top{display:flex;justify-content:space-between;align-items:center;font-size:11px;letter-spacing:1.8px}.chapter{font:italic 54px Georgia,serif;color:#ffffff3b;position:absolute;right:22px;bottom:15px}.cover-title{font:25px/1.15 Georgia,serif;width:85%;position:relative}.book-info{padding:18px 22px;width:100%}.book-info h3{font-size:16px;margin:0 0 10px}.book-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;gap:8px}.progress{height:4px;background:#e6ecdf;border-radius:9px;overflow:hidden;margin-top:15px}.progress span{display:block;height:100%;background:#70934c}.reader-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:22px}.reader-top .quiet{background:none;padding-left:0}.reader-tools{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.reader-tools button,.reader-tools select{min-height:44px;border:1px solid var(--border);background:var(--paper);color:var(--green);padding:8px 12px;border-radius:10px}.reading-shell{background:var(--paper);border:1px solid var(--border);border-radius:24px;padding:38px 56px 26px;max-width:880px;margin:auto}.story-heading{padding-bottom:22px;border-bottom:1px solid var(--border);margin-bottom:24px}.story-heading h1{font:36px/1.2 Georgia,serif;letter-spacing:0}.reader-hint{font-size:13px;color:var(--muted);margin:12px 0 0}.story-text{font:var(--read-size)/1.85 Georgia,"Times New Roman",serif;color:#23362d;min-height:290px}.story-text p{margin:0 0 24px}.word{cursor:pointer;border-radius:4px}.word.known{border-bottom:1px dotted #98aa6e}.word:hover,.word:focus{background:#e8f0d5}.reader-bottom{border-top:1px solid var(--border);padding-top:23px;display:flex;justify-content:space-between;align-items:center;gap:16px}.page-number{color:var(--muted);font-size:14px}.reader-progress{max-width:880px;margin:18px auto 0}.reader-progress .progress{margin-top:0}.quiz-options{display:flex;flex-direction:column;gap:12px;margin:24px 0}.quiz-options button{text-align:left;background:#edf2e6;color:var(--green);border:2px solid transparent}.quiz-options .correct{border-color:#5a812e;background:#e2efc9}.quiz-options .wrong{border-color:#c78d80;background:#f9e8e2}.feedback{line-height:1.7;color:var(--muted)}.finish{text-align:center;padding:32px 0}.finish .badge{font-size:48px;color:#6d8b43;margin-bottom:18px}.word-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.word-card{background:var(--paper);border:1px solid var(--border);color:var(--green);padding:18px;text-align:left}.word-card strong{display:block;font:24px Georgia,serif;margin-bottom:8px}.word-card span{font-size:14px;color:var(--muted)}.empty{padding:40px;background:#fff;border-radius:20px;color:var(--muted);line-height:1.8}dialog{border:1px solid var(--border);border-radius:22px;padding:34px;max-width:560px;width:calc(100% - 32px);color:var(--green);background:var(--paper);max-height:85dvh;overflow:auto}dialog::backdrop{background:#10282066;backdrop-filter:blur(5px)}dialog p{line-height:1.7;color:var(--muted)}.dialog-close{position:absolute;right:13px;top:12px;background:none;color:var(--green);font-size:25px;padding:4px;width:44px}.dialog-actions{display:flex;gap:10px;flex-wrap:wrap}#word-title{font:36px Georgia,serif}label{display:block;font-size:14px;margin-bottom:18px}input,textarea{display:block;width:100%;border:1px solid var(--border);border-radius:10px;padding:12px;margin-top:8px;background:var(--paper);color:var(--green)}hr{border:0;border-top:1px solid var(--border);margin:25px 0}.file-button{background:#eaf0e6;color:var(--green);margin:0;display:inline-flex;align-items:center}.file-button input{display:none}.help{font-size:13px}#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:var(--green);color:#fff;padding:14px 22px;border-radius:14px;display:none;z-index:10;max-width:90%;text-align:center}.night{--paper:#20342d;--border:#3b5045;--green:#d8ecd9;--muted:#adbcaf;background:#16261f;color:#d8ecd9}.night .story-text{color:#e1e9dc}.night button:not(.quiet){background:#cde28f;color:#193e31}.night .brand-mark{background:#cde28f;color:#193e31}.night .quiet,.night .quiz-options button{background:#364b3e;color:#d8ecd9}.night .word:hover{background:#476340}.night .word-card{color:#e1e9dc}.night .continue{background:#2a4738}.night .continue button{color:#173e35}@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-shell{padding:30px}.word-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:540px){header{height:76px;padding:0 18px}.brand{font-size:20px}#offline{display:none}.header-actions{gap:8px}main{padding:28px 18px 40px}h1{font-size:29px}.grid{gap:14px}.cover{padding:17px;min-height:150px}.cover-title{font-size:21px}.book-info{padding:15px}.book{min-height:280px}.book-meta{font-size:12px;flex-wrap:wrap}.continue{padding:22px;flex-wrap:wrap}.library-top{align-items:flex-start;flex-direction:column;gap:10px}.reading-shell{padding:25px 20px;border-radius:18px}.story-heading h1{font-size:29px}.reader-top{align-items:flex-start;flex-wrap:wrap}.reader-bottom{gap:8px}.reader-bottom button{padding:10px 13px}.word-grid{grid-template-columns:1fr}}@media(prefers-reduced-motion:no-preference){.book{transition:transform .15s}.book:hover{transform:translateY(-3px)}}
.cover-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32}.cover-top{position:relative}.picture-shell{max-width:1000px}.picture-page{display:block;width:100%;height:auto;border-radius:10px;background:white}.picture-text{margin:24px 0}.picture-text summary{cursor:pointer;padding:12px 0;font-size:15px}.picture-text .story-text{min-height:0;margin-top:12px}.attribution{font-size:12px;line-height:1.8;color:var(--muted);margin-top:24px}.attribution a{color:inherit;text-decoration:underline}

.picture-shell{max-width:1152px;padding:22px 16px}.picture-shell .story-heading{padding:0 12px 16px;margin-bottom:14px}.picture-navigation{margin-top:14px;padding-top:14px}.picture-shell .picture-text,.picture-shell .attribution{margin-left:12px;margin-right:12px}@media(max-width:540px){.picture-shell{padding:16px 8px}.picture-shell .story-heading{padding-left:8px;padding-right:8px}}
.picture-text:not([open])+.reader-bottom{display:none}
.picture-surface{touch-action:pan-y pinch-zoom}.picture-art{position:relative;overflow:hidden;background:#fff;border-radius:14px}.enlarged-art{width:min(100%,650px);aspect-ratio:1;margin:0 auto}.enlarged-art .picture-page{position:absolute;width:297.79%;max-width:none;left:-15.915%;top:-15.915%;border-radius:0}.art-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:1;width:52px;height:68px;padding:0;font-size:44px;border-radius:18px;background:#173e35cc;color:#fff;box-shadow:0 2px 10px #0002}.art-prev{left:8px}.art-next{right:8px}.art-arrow:disabled{visibility:hidden}.storybook-text{font-size:calc(var(--read-size) + 7px);line-height:1.65;min-height:0;max-width:900px;margin:22px auto 0;padding:0 18px}.storybook-text p{margin-bottom:0}@media(max-width:540px){.art-arrow{width:44px;height:58px}.storybook-text{padding:0 8px;font-size:calc(var(--read-size) + 3px)}}
.picture-mode{overflow:hidden;height:100dvh}.picture-mode header{display:none}.picture-mode main{height:100dvh;max-width:none;padding:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));display:flex;flex-direction:column;gap:6px}.picture-mode .reader-top{flex:0 0 44px;margin:0;flex-wrap:nowrap}.picture-mode .reader-tools{flex-wrap:nowrap;gap:4px}.picture-mode .reader-tools button{padding:6px 10px;font-size:14px;min-height:40px}.picture-mode .picture-shell{flex:1;min-height:0;width:100%;max-width:none;margin:0;padding:8px 10px;display:grid;grid-template-rows:36px minmax(0,1fr) 48px;gap:6px;border-radius:16px}.fit-heading{display:flex;align-items:center;gap:10px;min-width:0}.fit-heading strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-right:auto}.fit-ratio{display:flex;align-items:center;gap:6px;white-space:nowrap;font-size:12px;margin:0}.fit-ratio input{width:90px;padding:0;margin:0;accent-color:#173e35}.fit-heading button{font-size:12px;padding:5px 9px;min-height:30px}.picture-mode .picture-surface{min-height:0;min-width:0;overflow:hidden}.fit-reflow{display:grid;grid-template-rows:minmax(0,var(--art-share,54%)) minmax(0,1fr);gap:8px}.picture-mode .picture-art{width:100%;height:100%;min-height:0;min-width:0;aspect-ratio:auto;margin:0;display:flex;align-items:center;justify-content:center}.illustration-window{position:relative;width:100%;height:100%;overflow:hidden;flex:none}.fit-original .picture-page{width:100%;height:100%;object-fit:contain}.picture-mode .storybook-text{width:100%;height:100%;min-height:0;max-width:none;overflow:hidden;padding:0 10px;margin:0;font-size:32px;line-height:1.4;overflow-wrap:break-word}.picture-mode .storybook-text p{margin:0}.picture-mode .picture-navigation{margin:0;padding:4px 0 0;min-height:0}.picture-mode .picture-navigation button{min-height:38px;padding:7px 14px}.picture-mode .art-arrow{height:54px;width:42px;font-size:34px}.picture-mode #book-info .attribution{margin:14px 0 0}@media(min-aspect-ratio:1/1){.fit-reflow{grid-template-columns:minmax(0,var(--art-share,50%)) minmax(0,1fr);grid-template-rows:minmax(0,1fr);gap:16px}.picture-mode .storybook-text{align-self:center}}@media(max-width:420px){.fit-heading{gap:5px}.fit-heading strong{font-size:13px}.fit-ratio{font-size:0}.fit-ratio input{width:65px}.picture-mode .picture-shell{padding:6px}.picture-mode .reader-top .quiet{font-size:13px;padding:6px}.picture-mode .reader-tools button{padding:5px 8px;font-size:13px}}
.sentence-pair+.sentence-pair{margin-top:.35em}.picture-mode .sentence-zh{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:.78em;line-height:1.45;color:#657669;margin-top:.15em}.picture-mode #sentence-translation[aria-pressed=true]{background:#dfead4;color:#173e35}@media(max-width:420px){.picture-mode .reader-tools{gap:2px}.picture-mode .reader-tools button{padding:5px 6px;font-size:12px}.picture-mode #book-info-button{display:none}}
.storybook-text .word.known{border-bottom:0}
.record-entry{display:block;width:100%;text-align:left;margin:8px 0}.record-entry strong,.record-entry span{display:block}.record-entry span{font-size:14px;font-weight:400;line-height:1.6;margin-top:6px}.note-preview{white-space:pre-wrap}.reading-day h4{margin:18px 0 8px}.picture-mode #write-note{white-space:nowrap}@media(max-width:420px){.fit-ratio input{width:45px}.fit-heading{gap:4px}.fit-heading button{padding:4px 6px;font-size:11px}.header-actions{gap:4px}.header-actions button{padding:8px;font-size:13px}}

.source-art .picture-page{position:static;width:100%;height:100%;object-fit:contain;border-radius:0}.lexile-label{color:var(--green);font-size:14px;margin:8px 0}.book-info .lexile-label{line-height:1.5}

.speech-speed{border:1px solid var(--border);border-radius:10px;background:var(--paper);color:var(--green);padding:5px 6px;font:inherit;font-size:12px;min-height:30px;flex:none;max-width:75px}.picture-mode .speech-speed{font-size:12px}@media(max-width:420px){.picture-mode .speech-speed{font-size:11px;padding:4px 2px;max-width:56px}}

.book-synopsis{font-size:13px;color:var(--muted);line-height:1.6;margin:0 0 12px}.book-info .lexile-label{font-size:13px}
.fit-heading button,.fit-heading .fit-ratio{flex:none;white-space:nowrap}.fit-heading strong{min-width:0;flex:1}

/* English sentence rows; translations stay hidden until requested. */
.sentence-pair+.sentence-pair{margin-top:.5em}.sentence-main{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:10px}.sentence-actions{display:flex;gap:4px;padding-top:.12em}.sentence-actions button{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:12px;font-weight:500;min-height:30px;min-width:40px;padding:5px 4px;border-radius:7px;white-space:nowrap}.sentence-actions button[aria-pressed="true"]{background:#173e35;color:white}.sentence-zh[hidden]{display:none!important}.picture-mode .sentence-zh{margin-top:.25em;line-height:1.4}.sentence-en{min-width:0}.sentence-actions button:focus-visible{outline-offset:1px}@media(max-width:540px){.sentence-main{gap:6px}.sentence-actions{gap:3px}.sentence-actions button{font-size:11px;min-width:32px;min-height:28px;padding:4px 2px}}

/* Compact circular sentence controls arranged vertically. */
.sentence-main{gap:8px}.sentence-actions{flex-direction:column;gap:4px;padding-top:.08em}.sentence-actions button{display:grid;place-items:center;width:30px;height:30px;min-width:30px;min-height:30px;padding:0;border-radius:50%;border:1px solid #dbe5d8;background:#edf3e9;color:#355b49}.sentence-actions svg{display:block;width:19px;height:19px;pointer-events:none}.sentence-actions button.expanded{background:#dcebcf;border-color:#b6cea1}.sentence-actions button[aria-pressed="true"]{background:#173e35;color:#fff;border-color:#173e35}@media(max-width:540px){.sentence-main{gap:6px}.sentence-actions button{width:28px;height:28px;min-width:28px;min-height:28px}.sentence-actions svg{width:18px;height:18px}}

.picture-navigation .page-number{display:flex;align-items:center;gap:10px}.picture-navigation #first-page{font-size:12px;padding:8px}.sentence-en:has(+ .sentence-actions){margin:0}#chapter-jump{display:block;max-width:100%;margin:10px 0;padding:10px}
@media(max-width:480px){.picture-navigation .page-number{gap:4px}.picture-navigation #first-page{padding:6px;font-size:11px}}

.speech-voice{border:1px solid var(--border);border-radius:10px;background:var(--paper);color:var(--green);padding:5px 4px;font:inherit;font-size:12px;min-height:30px;flex:none;max-width:80px}@media(max-width:480px){.picture-mode .picture-shell{grid-template-rows:70px minmax(0,1fr) 48px}.fit-heading{flex-wrap:wrap;align-content:center}.fit-heading strong{flex:1 0 calc(100% - 160px);margin:0}.fit-ratio{order:3}.speech-voice{order:4}.speech-speed{order:5}#write-note{order:6}#auto-fit{order:7}}

#page-translation{white-space:nowrap}#page-translation[aria-pressed="true"]{background:var(--green);color:var(--paper)}@media(max-width:480px){#page-translation{order:8}}

.picture-navigation #listen{font-size:12px;padding:8px;white-space:nowrap}@media(max-width:480px){.picture-navigation #listen{font-size:11px;padding:6px}.picture-navigation .page-number{font-size:11px}.picture-mode .picture-navigation>button{padding:7px 10px}}

.fit-control-group{display:inline-flex;align-items:center;gap:6px;flex:none}.fit-heading .fit-control-group>*{order:0}@media(max-width:480px){.fit-control-group{gap:4px}.fit-heading .art-controls{order:1}.fit-heading .audio-controls{order:2}.fit-heading #write-note{order:3}.fit-heading #page-translation{order:4}}