@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600&display=swap');
:root{--bg:#f7f4ea;--ink:#393d33;--muted:#929184;--line:#dedbcc;--accent:#777e58;--card:#fffdf5;--serif:'Noto Serif SC','Songti SC','SimSun',serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--serif);transition:background .4s}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:1px solid var(--accent);outline-offset:5px}button:disabled{opacity:.4;cursor:default}
.grain{position:fixed;inset:0;pointer-events:none;opacity:.12;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' opacity='.25' filter='url(%23n)'/%3E%3C/svg%3E");z-index:100}
#app{min-height:100svh}header{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 5%;position:relative;z-index:10}.header-left,.tools{display:flex;align-items:center;gap:20px}.page-label{font-size:14px;letter-spacing:2px}.icon{border:0;background:none;font-size:22px;padding:8px;min-width:40px}.currency{font:15px Georgia,serif;letter-spacing:2px;color:var(--accent)}
.home{min-height:calc(100svh - 88px);display:flex;flex-direction:column;align-items:center;padding:clamp(35px,8vh,100px) 24px 40px}.home h1{display:flex;flex-direction:row-reverse;gap:18px;margin:0;font-weight:500;font-size:clamp(52px,7vw,78px);line-height:1.45}.home h1 span{writing-mode:vertical-rl;letter-spacing:14px}.home-actions{margin-top:clamp(50px,10vh,105px);display:flex;flex-direction:column;gap:28px}.home-button{border:0;background:none;display:flex;align-items:center;gap:20px;padding:8px 26px;font-size:16px;letter-spacing:4px}.home-button:hover{color:var(--accent)}.home-symbol{font-size:25px;line-height:1;width:25px;color:var(--accent)}
.content{max-width:930px;margin:40px auto;padding:0 28px}.list-tools{display:flex;gap:20px;margin-bottom:45px}.search,input,textarea{border:1px solid var(--line);background:transparent;padding:13px;border-radius:2px}.search{width:100%;border-width:0 0 1px;font-size:18px}.level{padding:26px 0;border-bottom:1px solid var(--line)}.level-head{display:flex;align-items:center;gap:24px;width:100%;padding:0;border:0;background:none;text-align:left}.level-title{font-size:20px;line-height:1.8;letter-spacing:2px;flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.level-head>span:last-child{color:var(--muted)}.level-detail{padding:18px 0 0}.level-detail p{line-height:2.4;font-size:18px;max-width:750px}.level-buttons{display:flex;gap:14px;align-items:center;margin-top:24px}.primary,.secondary{padding:12px 26px;letter-spacing:3px;border:1px solid var(--line);border-radius:2px;background:transparent}.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}.primary:hover{background:var(--accent)}.secondary:hover{border-color:var(--accent)}
.game{height:calc(100svh - 88px);min-height:480px;display:flex;flex-direction:column;position:relative;padding:0 3% 40px}.reading{flex:1;min-height:180px;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:12px 7%;text-align:center;position:relative;z-index:2;pointer-events:none}.passage{font-size:24px;line-height:2.2;letter-spacing:2px;overflow-wrap:anywhere}.slot{min-height:60px;display:flex;flex-wrap:wrap;justify-content:center;align-content:center;gap:4px;padding:8px 0;max-width:100%;transition:color .25s}.slot .token{position:relative;left:auto;top:auto;transform:none;pointer-events:auto}.pool{position:relative;flex:0 0 48%;min-height:230px;touch-action:none}.token{position:absolute;padding:0;margin:0;border:0;border-radius:0;background:none;box-shadow:none;white-space:pre;font-size:24px;line-height:1;letter-spacing:0;user-select:none;touch-action:none;cursor:grab;transform-origin:center;will-change:transform;min-width:0;min-height:0;-webkit-tap-highlight-color:transparent}.token:hover{color:var(--accent)}.token.dragging{z-index:30;cursor:grabbing;color:var(--ink)}.token:focus-visible{outline-offset:3px}.shelf{position:absolute;left:0;top:48%;width:22%;height:3px;background:var(--line);border-radius:2px}.shelf.two{left:auto;right:0;top:65%}.shelf.long{left:6%;width:88%;top:60%}.page-decoration{position:absolute;bottom:9px;left:50%;transform:translateX(-50%);font-size:16px;color:var(--muted);pointer-events:none}.incorrect{animation:shake .3s}.correct{color:var(--accent)}
.success{min-height:calc(100svh - 170px);display:flex;flex-direction:column;justify-content:center;text-align:center;animation:arrive .8s both}.success .passage{max-width:780px;margin:auto}.attribution{font-size:15px;line-height:2;letter-spacing:2px;color:var(--muted);margin:38px 0;animation:arrive 1.2s both}.success-actions{display:flex;justify-content:space-between;gap:14px;margin-top:auto;padding-top:55px;animation:arrive 1.7s both}.success-actions>div{display:flex;gap:14px}.starfall{position:fixed;pointer-events:none;inset:0;overflow:hidden;z-index:20}.starfall span{position:absolute;animation:fall 3s ease-in forwards;color:#a6a174;font-size:22px}
.styles{max-width:820px}.style-section{margin:0 0 36px}.style-section h3{font-size:13px;font-weight:400;letter-spacing:2px;color:var(--muted);margin-bottom:16px}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.choice{background:var(--swatch,transparent);color:var(--swatch-ink,var(--ink));border:1px solid var(--line);padding:25px 16px;text-align:center;border-radius:2px;position:relative;font-size:16px;letter-spacing:2px}.choice.selected{border-color:var(--accent)}.choice.selected:after{content:'';position:absolute;bottom:9px;left:50%;width:4px;height:4px;border-radius:50%;background:currentColor}.form{display:grid;gap:20px}.form textarea{min-height:180px;line-height:2;resize:vertical}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.preview-row{padding:18px 0;line-height:2}.preview-row input{width:100%;margin-top:10px}.file-button{display:inline-grid;place-items:center;width:46px;height:46px;border:1px solid var(--line);position:relative;overflow:hidden;font-size:26px;cursor:pointer}.file-button input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.invalid{outline:1px solid #a35c4a;outline-offset:2px}.modal-backdrop{position:fixed;inset:0;background:#24261d33;z-index:200;display:grid;place-items:center;padding:24px}.modal{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:center;max-width:440px;background:var(--bg);padding:35px;border:1px solid var(--line)}#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);padding:10px 20px;background:var(--ink);color:var(--bg);opacity:0;pointer-events:none;z-index:1000}#toast.show{opacity:1}
@keyframes arrive{from{opacity:0;translate:0 12px}to{opacity:1;translate:0 0}}@keyframes fall{from{transform:translateY(-30px) rotate(0);opacity:1}to{transform:translateY(95vh) rotate(160deg);opacity:0}}@keyframes shake{25%{translate:-4px 0}75%{translate:4px 0}}
@media(max-width:650px){header{height:72px;padding:0 16px}.header-left,.tools{gap:10px}.home{min-height:calc(100svh - 72px);padding-top:8vh}.home-actions{margin-top:9vh;gap:22px}.content{margin:26px auto;padding:0 22px}.level-title{font-size:17px;letter-spacing:1px}.level-detail p{font-size:16px}.game{height:calc(100svh - 72px);padding:0 14px 32px}.reading{padding:8px 3%;min-height:180px}.passage,.token{font-size:21px}.shelf{width:26%}.slot{gap:2px}.choices{gap:10px}.choice{padding:22px 8px;font-size:15px}.success-actions{gap:10px}.success-actions>div{gap:8px}.success-actions button{font-size:12px;padding:10px 12px;letter-spacing:1px}.form-row{grid-template-columns:1fr}.page-label{font-size:13px}}
@media(prefers-reduced-motion:reduce){.success,.attribution,.success-actions{animation:none}.starfall{display:none}}

/* Horizontal two-line title, type previews, and reading size. */
.home h1{flex-direction:column;gap:0;text-align:center;line-height:1.22}
.home h1 span{writing-mode:horizontal-tb;letter-spacing:5px;padding-left:5px}
.passage,.token,.sentence-line{font-size:var(--reading-size,18px)}
.font-serif{font-family:var(--serif)}
.font-kai{font-family:KaiTi,STKaiti,serif}
.font-sans{font-family:'Microsoft YaHei',sans-serif}
.choice.font-preview{font-size:var(--reading-size,18px)}
.choice-icon{display:block;font-family:Georgia,serif;font-size:30px;line-height:1;margin-bottom:14px;letter-spacing:0}
.size-heading{display:flex;align-items:center;justify-content:space-between}
.size-heading output{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
#font-size{display:block;width:100%;padding:0;height:24px;margin:8px 0;border:0;accent-color:var(--accent);cursor:ew-resize}
.shelf:not(.long){width:max(22%,calc(var(--reading-size,18px)*4.3))}
.word-out{animation:wordFadeOut var(--motion-out,540ms) cubic-bezier(.4,0,.6,1) both;pointer-events:none}
.word-in{animation:wordFadeIn var(--motion-in,780ms) cubic-bezier(.4,0,.2,1) var(--motion-inDelay,140ms) both;pointer-events:none}
.pool-enter{animation:poolFadeIn 1200ms cubic-bezier(.4,0,.2,1) both}
.sentence-line{position:relative;line-height:2.05;white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%}
.punctuation-reveal{animation:punctuationFadeIn 920ms cubic-bezier(.4,0,.2,1) both}
.sentence-celebrate{animation:sentenceHighlight var(--motion-highlight,740ms) ease-in-out both}
@keyframes wordFadeOut{from{opacity:1}to{opacity:0}}
@keyframes wordFadeIn{from{opacity:0;filter:blur(.35px)}to{opacity:1;filter:blur(0)}}
@keyframes poolFadeIn{from{opacity:0;filter:blur(.5px)}to{opacity:1;filter:blur(0)}}
@keyframes punctuationFadeIn{from{opacity:0}to{opacity:1}}
@keyframes sentenceHighlight{0%,100%{color:var(--ink);text-shadow:0 0 0 transparent}45%{color:color-mix(in srgb,var(--ink) 50%,#c4b67b);text-shadow:0 0 7px color-mix(in srgb,var(--accent) 15%,transparent)}}
@media(max-width:650px){.shelf:not(.long){width:max(26%,calc(var(--reading-size,18px)*4.3))}}
@media(prefers-reduced-motion:reduce){.word-out,.word-in,.pool-enter,.punctuation-reveal{filter:none}.sentence-celebrate{animation:none}}

/* The page is regular flowing prose. Inline glyphs retain native line breaking. */
.reading{justify-content:flex-start;align-items:stretch;padding:clamp(24px,5vh,52px) clamp(24px,7vw,108px) 8px;text-align:left}
.page-text{width:100%;max-width:860px;margin:0 auto}
.completed{margin:0;text-align:justify;text-align-last:start;text-justify:inter-character;text-indent:2em;line-height:2.05;letter-spacing:.035em;line-break:strict;overflow-wrap:anywhere}
.completed:empty{min-height:2.05em}
.slot{display:block;align-content:normal;max-width:860px;width:100%;margin:18px auto 0;padding:8px 0;min-height:2.5em;line-height:2.05;text-align:left;font-size:var(--reading-size,18px);letter-spacing:.035em}
.slot .token{display:inline-block;line-height:2.05;letter-spacing:inherit;vertical-align:baseline;margin:0 .08em 0 0}
.glyph{display:inline}
.flying-glyph{position:fixed;z-index:80;display:block;margin:0;padding:0;border:0;background:none;pointer-events:none;white-space:pre;text-indent:0;text-align:left;transform-origin:0 0;will-change:transform;user-select:none}
.is-complete .attribution{text-align:right;margin:28px 0 0;animation:wordFadeIn 1000ms ease-in-out 200ms both}
.is-complete .success-actions{position:absolute;left:10%;right:10%;bottom:32px;margin:0;padding:0;animation:wordFadeIn 1100ms ease-in-out 400ms both}
@media(max-width:650px){.reading{padding:26px 20px 8px}.slot{margin-top:14px}.completed{letter-spacing:.02em}.is-complete .success-actions{left:7%;right:7%;bottom:22px}}
/* Page items animate individually; containers must not add a second entrance. */
.home,.home h1,.home-actions,.content,.level-detail,.attribution,.is-complete .attribution,.success-actions,.is-complete .success-actions{animation:none}
.level-intro,.operation-hint{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:calc(100% - 48px);max-width:860px;text-align:center;pointer-events:none;line-height:2;z-index:4}
.level-intro{font-size:var(--reading-size,18px);animation:introAppear 800ms cubic-bezier(.22,.61,.36,1) both}
.level-intro span{display:inline-block;white-space:nowrap}
.level-intro.intro-out{animation:wordFadeOut 650ms ease-in-out both}
.operation-hint{font-size:12px;letter-spacing:2px;color:var(--muted);opacity:.65;animation:hintAppear 1000ms ease-in-out both}
.operation-hint.hint-out{animation:hintDisappear 650ms ease-in-out both}
.scatter-enter{animation:wordFadeIn 420ms ease-out both}
@keyframes introAppear{from{opacity:0;translate:0 12px}to{opacity:1;translate:0 0}}
@keyframes hintAppear{from{opacity:0}to{opacity:.65}}
@keyframes hintDisappear{from{opacity:.65}to{opacity:0}}
@media(prefers-reduced-motion:reduce){.level-intro{animation:wordFadeIn 300ms both}.scatter-enter{animation:wordFadeIn 200ms both}}

/* Search keeps its icon visible while typing. */
.search-field{display:flex;align-items:center;gap:12px;flex:1;min-width:0;border-bottom:1px solid var(--line);padding-left:4px}
.search-icon{width:20px;height:20px;flex:none;fill:none;stroke:var(--muted);stroke-width:1.5;stroke-linecap:round}
.search-field .search{min-width:0;border:0;padding:13px 0}
.styles .choice{font-size:var(--reading-size,18px)}
.success-actions .secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;background:none;box-shadow:none;padding:10px 8px;color:var(--muted)}
.success-actions .secondary:hover{color:var(--ink)}
.share-icon{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;flex:none}
@media(max-width:650px){.styles .choice{padding-left:4px;padding-right:4px;letter-spacing:0}.success-actions .secondary{padding:10px 4px}}

/* Flowing source paragraphs share one independently scrollable reading area. */
.reading{min-height:0;overflow-y:auto;overflow-x:hidden;pointer-events:auto;scrollbar-width:thin;scrollbar-color:var(--line) transparent;overscroll-behavior:contain}
.completed{text-indent:0;white-space:normal}
.paragraph{margin:0;text-align:justify;text-align-last:start;text-indent:2em;line-height:2.05;letter-spacing:.035em;white-space:pre-wrap;overflow-wrap:anywhere}
.paragraph+.paragraph{margin-top:.65em}
.paragraph.verse{text-indent:0;text-align:left}
.paragraph.verse+.paragraph.verse{margin-top:0}
.paragraph.verse.stanza-start{margin-top:1em}
.level-heading{flex:1;min-width:0;display:block}.level-heading .level-title{display:block}
.level-credit{display:block;margin-top:8px;font-size:13px;line-height:1.8;color:var(--muted);letter-spacing:1px}
.custom-section>h3{font-size:14px;font-weight:400;color:var(--muted);margin:36px 0 0;letter-spacing:2px}
.level-detail p{white-space:pre-wrap}

.reading>.page-text,.reading>.slot{flex-shrink:0}

/* Book details expose only a three-line excerpt. */
.level-detail p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;line-clamp:3;overflow:hidden;overflow-wrap:anywhere}