:root{--radius:var(--radius-panel);--safe:env(safe-area-inset-bottom,0px)}
[hidden]{display:none!important}
.number-sheet>button{display:flex;align-items:center;gap:12px;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px;color:var(--ink)}
.number-sheet>button[aria-pressed=true]{border-color:var(--accent);background:var(--soft)}
.number-sheet>button>strong{font-size:22px;color:var(--accent);min-width:28px}
.family-heading{margin:24px 0 12px}.family-heading p{color:var(--muted)}
.number-family{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:24px}
.number-family>button{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:left;border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--paper);color:var(--ink)}
.number-family img{width:100%;max-width:125px;aspect-ratio:370/640;object-fit:contain}.number-family small{line-height:1.7;color:var(--muted)}
.knowledge-sheet .element-card{padding:0;background:none;border:0;flex:none}.element-card img{width:62px;height:auto;border-radius:5px;display:block}

*{box-sizing:border-box}
html{background:var(--bg);color:var(--ink);font-family:var(--font-body);-webkit-text-size-adjust:100%}
body{margin:0;font-size:16px;line-height:1.65}
html[lang="en"] body{line-height:1.5}
button,input{font:inherit}
button{cursor:pointer;color:inherit;-webkit-tap-highlight-color:transparent}
button,a{touch-action:manipulation}
button{transition:background var(--motion-press),transform var(--motion-press) var(--ease-settle)}
button:active:not(:disabled){transform:scale(.985)}
button:disabled{cursor:default;opacity:.6}
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
button svg{pointer-events:none}
button img{pointer-events:none}
a{color:var(--accent)}
h1,h2,h3,p{margin:0}
h1{font:500 34px/1.3 var(--font-display);letter-spacing:0;text-wrap:balance}
h2{font-size:21px;line-height:1.45;font-weight:600}
h3{font-size:17px;font-weight:600}
small{font-size:12px}
.muted{color:var(--muted)}
.tiny{font-size:12px}
.eyebrow{font-size:11px;letter-spacing:0;color:var(--muted);text-transform:none}
.startup{padding:60px;text-align:center}
.shell{max-width:1000px;margin:auto;padding:0 36px 120px;min-height:100dvh}
.topbar{height:94px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{border:0;background:none;padding:8px 0;display:flex;align-items:center;gap:11px;font-size:17px;letter-spacing:0;font-weight:600}
.brandmark{width:27px;height:34px;border:1px solid var(--accent);border-radius:5px;display:grid;place-items:center;font-size:21px;font-weight:400}
.badge{font-size:11px;letter-spacing:1px;padding:5px 10px;border:1px solid var(--line);border-radius:999px;white-space:nowrap}
.toplinks{display:flex;align-items:center;gap:14px}
.toplinkbtn{min-height:44px;border:0;background:none;color:var(--accent);padding:8px 4px;font-size:13px}
.iconbtn{min-width:44px;min-height:44px;border:0;background:none;display:inline-grid;place-items:center;border-radius:50%}
.icon{width:21px;height:21px;stroke:currentColor;stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round}
.row{display:flex;align-items:center;justify-content:space-between;gap:14px}
.flex{display:flex;align-items:center;gap:12px}
.section{margin-top:32px}
.sectionhead{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}
.linkbtn{border:0;background:none;color:var(--accent);padding:8px 0;min-height:44px;font-size:13px}
.hero{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;min-height:350px;gap:20px}
.hero .eyebrow{margin-bottom:14px}
.hero h1{font-size:39px}
.hero p{margin-top:17px;color:var(--muted);max-width:350px}
.fan{height:300px;position:relative;display:flex;align-items:center;justify-content:center}
.fan img{position:absolute;width:130px;height:224px;object-fit:contain;border:5px solid var(--paper);border-radius:8px;box-shadow:0 7px 14px #21362918}
.fan img:nth-child(1){transform:translateX(-82px) rotate(-14deg)}
.fan img:nth-child(2){transform:translateX(82px) rotate(14deg)}
.fan img:nth-child(3){transform:translateY(-8px);width:144px;height:248px}
.fanlabel{position:absolute;bottom:1px;left:0;right:0;text-align:center;font-size:11px;letter-spacing:2px;color:var(--muted)}
.studycall{background:transparent;color:var(--ink);padding:24px 0;border-top:1px solid var(--line);border-radius:0;display:flex;align-items:center;justify-content:space-between;gap:18px}
.studycall h2{font-size:22px}
.studycall p{color:var(--muted);font-size:14px;margin-top:8px}
.primary{border:1px solid var(--accent);background:var(--accent);color:var(--paper);min-height:50px;border-radius:var(--radius-button);padding:12px 24px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;gap:10px}
.primary.light{background:var(--accent);border-color:var(--accent);color:var(--bg)}
.secondary{border:1px solid var(--control-line);background:var(--paper);min-height:48px;border-radius:var(--radius-button);padding:12px 20px}
.wide{width:100%}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);padding:24px 0;border-bottom:1px solid var(--line)}
.mini-stats>div{padding-left:24px;border-left:1px solid var(--line)}
.mini-stats>div:first-child{border:0;padding-left:0}
.mini-stats strong{font-size:24px;font-weight:500;margin-right:7px}
.mini-stats span{font-size:12px;color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.feature{padding:24px 0;border:0;border-bottom:1px solid var(--line);background:transparent;border-radius:0;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:12px}
.feature p{font-size:14px;color:var(--muted);margin-top:6px}
.feature-icon{width:43px;height:43px;border-radius:50%;background:var(--soft);display:grid;place-items:center;flex:none}
.discovery{display:flex;gap:14px;overflow-x:auto;padding:2px 2px 12px;scrollbar-width:thin}
.discovery button{border:0;padding:0;background:none;text-align:left;min-width:98px}
.discovery img{width:95px;height:161px;object-fit:contain;border-radius:7px;display:block;margin-bottom:7px}
.discovery strong{font-size:13px;font-weight:500}
.discovery small{display:block;color:var(--muted)}
.footnote{text-align:center;color:var(--muted);font-size:12px;margin:32px 0 0}
.bottomnav{position:fixed;bottom:calc(12px + var(--safe));left:50%;transform:translateX(-50%);width:calc(100% - 32px);max-width:580px;z-index:15;background:var(--glass);border:1px solid var(--paper);border-radius:32px;box-shadow:var(--shadow-float);padding:0 8px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.navinner{max-width:680px;margin:auto;display:grid;grid-template-columns:repeat(3,1fr)}
.navitem{border:0;background:none;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-height:68px;font-size:12px;color:var(--muted)}
.navitem.active{color:var(--accent);font-weight:600}
.navitem.active .iconwrap{background:transparent}
.iconwrap{display:grid;place-items:center;width:52px;height:28px;border-radius:20px}
.pagehead{margin:24px 0 25px}
.pagehead p{color:var(--muted);margin-top:10px;font-size:14px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}
.chip{border:1px solid var(--control-line);background:transparent;border-radius:999px;min-height:44px;padding:7px 14px;font-size:12px}
.chip.active{background:var(--accent);border-color:var(--accent);color:white}
.home-simple{max-width:780px;margin:44px auto 0}
.home-simple>h1{font-size:42px;margin-top:10px}
.home-simple>p{color:var(--muted);margin-top:12px;max-width:560px}
.home-decisions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:18px;row-gap:5px;margin-top:40px}
.home-choice{min-width:0;padding:26px;border:1px solid var(--line);border-radius:24px;background:var(--paper);display:grid;grid-template-rows:subgrid;grid-row:1/span 5;text-align:left;position:relative;overflow:hidden}
.learn-choice{grid-column:1}.reading-choice{grid-column:2}
.home-choice>.icon{justify-self:end;align-self:end;margin-top:9px;color:var(--accent)}
.home-choice-art{height:155px;width:100%;display:flex;align-items:center;justify-content:center;position:relative}
.home-choice-art img{position:absolute;height:145px;width:auto;border-radius:6px;box-shadow:var(--shadow-card)}
.home-choice-art img:first-child{transform:translateX(-36px) rotate(-7deg)}
.home-choice-art img:last-child{transform:translateX(36px) rotate(7deg)}
.home-spread-art{height:155px;width:100%;display:flex;align-items:center;justify-content:center;gap:13px}
.home-spread-art i,.spread-thumb i{display:block;aspect-ratio:3/5;border-radius:5px;background:var(--accent) var(--card-back) center/100% 100%;box-shadow:var(--shadow-card)}
.home-spread-art i{width:55px}
.home-spread-art i:first-child{transform:rotate(-7deg) translateY(8px)}
.home-spread-art i:last-child{transform:rotate(7deg) translateY(8px)}
.home-choice-copy{display:contents}
.home-choice-copy small{padding-top:12px}
.home-choice-copy>*{min-width:0;overflow-wrap:anywhere}
.home-choice-copy small{color:var(--accent);font-size:12px}
.home-choice-copy strong{font:500 25px/1.35 var(--font-display)}
.home-choice-copy>span{font-size:13px;color:var(--muted);line-height:1.65}
.home-note{font-size:12px!important;margin-top:23px!important}
.home-learning-choice{display:contents}
.home-learning-support{grid-column:1;grid-row:6;min-width:0}
.home-learning-choice .home-choice{width:100%}
.home-learning-actions{display:flex;align-items:center;flex-wrap:wrap;gap:6px 16px;margin-top:12px}
.home-learning-actions .secondary{padding:10px 15px;min-height:46px}
.home-learning-actions .linkbtn{min-height:44px}
.home-progress-note{font-size:12px!important;color:var(--muted);margin:8px 0 0!important}
.library-views{display:flex;border-bottom:1px solid var(--line);gap:6px;margin-bottom:22px}
.library-views button{flex:1;min-height:50px;padding:10px 6px;border:0;border-bottom:3px solid transparent;background:none;color:var(--muted)}
.library-views button.active{border-bottom-color:var(--accent);color:var(--accent);font-weight:600}
.library-resume{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--soft);border-radius:12px;padding:10px 16px;font-size:13px}
.knowledge-intro{margin:26px 0}.knowledge-intro h2{font-size:23px}.knowledge-intro p{font-size:14px;color:var(--muted);margin-top:8px}
[data-library-section=foundations] .knowledge-grid button{display:grid;grid-template-columns:60px minmax(0,1fr);gap:12px;align-items:center;padding:15px}
[data-library-section=foundations] .knowledge-grid img{width:60px;aspect-ratio:3/5;object-fit:contain;border-radius:4px}
[data-library-section=foundations] .knowledge-grid button>span{font-size:inherit;letter-spacing:normal;margin:0}
[data-library-section=foundations] .knowledge-grid strong{display:block}
.library-spread-lessons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.library-spread-lessons>button{background:var(--paper);border:1px solid var(--control-line);border-radius:16px;padding:20px 12px;text-align:left}
.library-spread-lessons>button>strong{display:block;font-size:16px;margin:14px 0 5px}
.library-spread-lessons>button>small{display:block;font-size:12px;color:var(--muted)}
.lesson-layout{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;align-items:center;height:148px}
.lesson-layout>span{display:flex;flex-direction:column;align-items:center;gap:3px}.lesson-layout img{width:100%;max-width:70px;aspect-ratio:3/5;object-fit:contain;border-radius:4px}.lesson-layout small{font-size:10px;color:var(--muted)}
.lesson-layout-one{grid-template-columns:1fr}.lesson-layout-choice{grid-template-columns:repeat(3,minmax(0,1fr))}.lesson-layout-choice img{max-height:58px}
.sheet:has(.card-dossier){overflow-anchor:none}
.detail-hero img{transition:transform var(--motion-flip) var(--ease-settle)}
@media(max-width:600px){.home-decisions{gap:24px}.library-spread-lessons{grid-template-columns:1fr}.library-spread-lessons>button{display:grid;grid-template-columns:130px minmax(0,1fr);column-gap:20px;align-items:center}.library-spread-lessons>button>.lesson-layout{grid-row:span 2}.library-spread-lessons>button>strong{margin:0;align-self:end}.library-spread-lessons>button>small{align-self:start}.lesson-layout{height:135px}[data-library-section=foundations] .knowledge-grid{grid-template-columns:1fr}.library-tools>.secondary{margin-top:10px}.library-head h1{font-size:30px}}
@media(prefers-reduced-motion:reduce){.detail-hero img{transition:none}}
.learning-progress{display:grid;grid-template-columns:1fr 1fr auto;align-items:center;gap:18px;padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:var(--paper)}
.learning-progress>div{display:flex;flex-direction:column}
.learning-progress span{font-size:11px;color:var(--muted)}
.learning-progress strong{font-size:25px;font-weight:500;line-height:1.3}
.learning-progress small{font-size:12px;color:var(--muted)}
.library-knowledge{margin-top:30px}
.advanced-learning{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:25px}
.advanced-learning>summary{padding:14px 0;color:var(--accent);font-size:13px;cursor:pointer}
.knowledge-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.knowledge-grid button{min-height:112px;border:1px solid var(--line);border-radius:15px;background:var(--paper);padding:17px;text-align:left;display:flex;flex-direction:column;align-items:flex-start}
.knowledge-grid button>span{font-size:18px;letter-spacing:2px;margin-bottom:10px}
.knowledge-grid strong{font-size:16px}
.knowledge-grid small{font-size:12px;color:var(--muted);margin-top:4px}
.library-list-head{margin-top:34px}
.library-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.library-card{border:1px solid var(--line);border-radius:16px;background:var(--paper);padding:12px;text-align:left;position:relative}
.library-card img{width:100%;aspect-ratio:0.586;object-fit:contain;border-radius:9px;display:block}
.library-card-copy{padding:10px 2px 3px}
.library-card-copy>small{font-size:10px;color:var(--muted)}
.library-card h3{font-size:16px;margin:4px 0}
.library-card p{font-size:12px;color:var(--ink);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:58px}
.library-card-copy>span{font-size:10px;color:var(--muted);display:block;margin-top:8px}
.seen-dot{position:absolute;right:8px;top:8px;background:var(--paper);border-radius:999px;padding:2px 8px;font-size:10px;color:var(--accent)}
.study-shell{max-width:850px;margin:auto;padding:0 30px 45px;min-height:100dvh}
.study-top{height:79px;display:flex;align-items:center;gap:15px}
.study-top .progress{flex:1}
.progress{height:4px;background:var(--line);border-radius:9px;overflow:hidden}
.progressfill{height:100%;background:var(--accent);transition:width .25s}
.study-counter{font-size:12px;white-space:nowrap;color:var(--muted)}
.study-grid{display:grid;grid-template-columns:240px 1fr;gap:42px;padding-top:20px}
.question-visual{text-align:center}
.question-card{border:0;padding:0;background:none;position:relative;display:block;width:188px;margin:14px auto}
.question-card img{display:block;width:100%;aspect-ratio:.586;object-fit:contain;border-radius:9px}
.question-card.covered:after{content:'先看画面';position:absolute;bottom:0;left:0;right:0;padding:4px;background:var(--soft);border-radius:0 0 7px 7px;font-size:11px;letter-spacing:2px;color:var(--muted)}
.card-caption{font-size:12px;color:var(--muted);margin-top:8px}
.question-main .eyebrow{margin-bottom:9px}
.question-main h2{font-size:22px}
.context{color:var(--muted);font-size:13px;margin-top:9px;line-height:1.8}
.options{display:grid;gap:10px;margin:21px 0 10px}
.option{border:1px solid var(--control-line);background:var(--paper);border-radius:13px;padding:14px;display:flex;align-items:flex-start;gap:13px;text-align:left;line-height:1.65;min-height:62px;font-size:14px}
.letter{width:26px;height:26px;flex:none;border:1px solid var(--line);border-radius:50%;font-size:11px;display:grid;place-items:center;line-height:1;margin-top:0}
.option.correct{border-color:var(--success);background:var(--success-bg)}
.option.correct .letter{background:var(--success);color:var(--paper);border-color:var(--success)}
.option.incorrect{border-color:#c9a89d;background:#f6efea}
.option:disabled{opacity:1}
.option.selected{border-color:var(--accent);background:var(--soft)}
.helper-row{display:flex;justify-content:space-between;align-items:center;gap:12px}
.hint{background:var(--soft);padding:12px 15px;border-radius:10px;color:var(--ink);font-size:13px;margin-top:12px}
.answer-feedback{border-top:1px solid var(--line);margin-top:24px;padding-top:21px}
.feedbacktitle{font-size:17px;font-weight:600;color:var(--accent)}
.answer-feedback p{font-size:14px;margin-top:9px}
.evidence{border-left:2px solid var(--accent);padding-left:12px;color:var(--muted);margin:16px 0}
.answer-feedback details{font-size:13px;margin:18px 0}
.answer-feedback summary{cursor:pointer;min-height:36px;color:var(--accent)}
.reasons p{font-size:12px;color:var(--muted);margin:9px 0}
.confidence{display:flex;align-items:center;gap:9px;margin:16px 0}
.confidence .chip{border-radius:10px;min-height:39px}
.nextrow{position:sticky;bottom:12px;z-index:4;margin:19px -4px 0;padding:8px 4px;background:linear-gradient(180deg,transparent,var(--bg) 30%)}
.backstage{display:grid;place-items:center;min-height:calc(100dvh - 150px);padding:10px 0 40px;text-align:center}
.backstage h1{font-size:28px;margin-top:24px}
.backstage p{color:var(--muted);margin:12px auto 24px;max-width:350px;font-size:14px}
.card-back{width:170px;aspect-ratio:3/5;border-radius:var(--radius-card);background:var(--accent) var(--card-back) center/100% 100%;box-shadow:var(--shadow-card);position:relative;transform:rotate(-4deg)}


.card-back span{display:none}
.draw-button{background:none;border:0;padding:18px 30px;animation:enter .3s ease-out}
.draw-meta{font-size:11px!important;letter-spacing:1px}
.complete{max-width:500px;margin:35px auto;text-align:center}
.complete .seal{width:82px;height:82px;border:1px solid var(--accent);border-radius:50%;margin:20px auto 28px;display:grid;place-items:center;color:var(--accent)}
.complete h1{font-size:28px}
.complete p{color:var(--muted);margin-top:13px}
.resultline{display:flex;align-items:center;gap:12px;text-align:left;padding:14px 0;border-bottom:1px solid var(--line)}
.resultline img{width:40px;height:67px;border-radius:3px;object-fit:contain}
.resultline .text{flex:1}
.resultline strong{font-size:14px;font-weight:500}
.resultline small{display:block;color:var(--muted)}
.complete-actions{display:grid;gap:10px;margin-top:28px}
.toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%);z-index:80;padding:10px 20px;background:var(--ink);color:white;border-radius:12px;font-size:13px;max-width:90vw;text-align:center}
.modal-backdrop{position:fixed;inset:0;background:#302c3266;z-index:50;display:flex;align-items:flex-end;justify-content:center;padding-top:28px}
.sheet{width:min(680px,100%);max-height:92dvh;background:var(--bg);border-radius:24px 24px 0 0;overflow:auto;padding:20px 28px calc(32px + var(--safe));overscroll-behavior:contain;animation:enter .2s ease-out}
.sheethead{display:flex;justify-content:space-between;align-items:center;gap:12px;position:sticky;top:-20px;background:var(--bg);z-index:1;padding:4px 0 10px}
.sheethead h2{font-size:19px}
.detail-hero{display:grid;grid-template-columns:135px 1fr;gap:23px;align-items:center;margin:8px 0 24px}
.detail-hero img{width:135px;aspect-ratio:.586;object-fit:contain;border-radius:8px}
.detail-hero p{font-size:14px;margin-top:12px}
.detail-hero .eyebrow{font-size:10px;letter-spacing:1px}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.tag{font-size:11px;background:var(--soft);border-radius:5px;padding:3px 7px}
.detail-section{padding:20px 0;border-top:1px solid var(--line)}
.detail-section h3{margin-bottom:10px;font-size:15px}
.detail-section p{font-size:14px;color:var(--ink);margin-top:8px}
.card-overview{border-top:0;padding-top:0}
.detail-section .clue{display:flex;gap:13px;margin:13px 0}
.clue strong{flex:0 0 75px;font-size:13px;font-weight:500}
.clue span{font-size:13px;color:var(--muted)}
.segmented{background:var(--soft);border-radius:12px;padding:4px;display:flex;gap:3px;margin:12px 0}
.segmented button{background:none;border:0;border-radius:9px;flex:1;min-height:38px;font-size:13px}
.segmented button.active{background:var(--paper);color:var(--accent)}
.zoom-backdrop{position:fixed;inset:0;background:#302c32f5;z-index:65;display:flex;align-items:center;justify-content:center;overflow:auto;padding:70px 22px 25px}
.zoom-backdrop img{max-width:95%;max-height:calc(100dvh - 110px);object-fit:contain;touch-action:pinch-zoom}
.zoom-backdrop .iconbtn{position:fixed;right:18px;top:15px;color:white;background:#ffffff14}
.practice-row{width:100%;text-align:left;padding:23px 0;border:0;border-bottom:1px solid var(--line);background:none;display:flex;align-items:center;justify-content:space-between;gap:20px}
.practice-row h3{font-size:17px}
.practice-row p{margin-top:6px;color:var(--muted);font-size:13px}
.practice-number{font-family:Georgia,serif;font-size:32px;font-style:italic;color:var(--accent);width:36px;flex:none}
.practice-text{flex:1}
.spread-hero{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:26px;margin:23px 0}
.spread-hero p{color:var(--muted);font-size:13px;margin-top:10px}
.spread-board{display:grid;gap:14px;margin:26px 0}
.spread-board.three{grid-template-columns:repeat(3,1fr)}
.spread-board.six{grid-template-columns:repeat(3,1fr)}
.spread-board.one{max-width:160px;margin:25px auto}
.spread-slot{padding:0;border:0;background:none;position:relative;text-align:center}
.spread-slot img{width:100%;aspect-ratio:.586;object-fit:contain;border-radius:7px;display:block}
.spread-slot.active img{outline:3px solid var(--accent);outline-offset:4px}
.spread-label{display:block;margin:10px 0 3px;font-size:12px;color:var(--muted)}
.spread-name{font-size:13px}
.position-panel{background:var(--soft);padding:20px;border-radius:15px}
.position-panel p{margin-top:9px;font-size:14px}
.position-panel .eyebrow{margin-bottom:6px}
.position-panel h3{font-size:16px}
.spread-actions{display:grid;gap:10px;margin:24px 0}
.mode-note{font-size:12px;color:var(--muted);padding:15px 0;border-top:1px solid var(--line)}
.spread-intro{display:flex;align-items:center;gap:13px;margin:25px 0}
.spread-intro .iconbtn{margin-left:-8px}
.spread-intro h1{font-size:24px}
.scenario{padding:20px;background:var(--paper);border-radius:15px;border:1px solid var(--line);font-size:14px}
.scenario strong{font-size:12px;color:var(--muted);font-weight:400;display:block;margin-bottom:5px}
.match-labels{display:grid;gap:9px;margin:18px 0}
.match-labels button{text-align:left}
.statgrid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.statbox{border:1px solid var(--line);background:var(--paper);border-radius:16px;padding:20px}
.statbox strong{font-size:29px;font-weight:500}
.statbox span{display:block;font-size:12px;color:var(--muted)}
.setting-row{padding:17px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.setting-row strong{font-size:14px;font-weight:500}
.setting-row p{font-size:12px;color:var(--muted);margin-top:3px}
.setting-row button{font-size:12px;flex:none}
.notice{padding:13px 16px;border-radius:11px;background:var(--soft);font-size:12px;color:var(--ink);margin:15px 0}
.empty{padding:27px 0;color:var(--muted);font-size:14px;text-align:center}
.source-list{font-size:12px;word-break:break-word}
.source-list p{margin:14px 0}
.status-row{padding:12px 0;display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);font-size:14px}
.status-value{color:var(--accent);text-align:right}
.buttonstack{display:grid;gap:10px;margin-top:20px}
.knowledge-sheet{display:grid;gap:0;margin:20px 0}
.knowledge-sheet article{display:grid;grid-template-columns:45px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.knowledge-sheet article>span{font-size:25px}
.knowledge-sheet h3{font-size:15px}
.knowledge-sheet p{font-size:13px;margin-top:3px}
.knowledge-sheet small{display:block;color:var(--muted);margin-top:5px}
.number-sheet{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);margin:20px 0;border:1px solid var(--line)}
.number-sheet article{background:var(--bg);padding:15px;display:flex;gap:12px;align-items:center}
.number-sheet strong{font:500 24px var(--font-display);color:var(--accent);width:24px}
.number-sheet span{font-size:12px}
.subtleline{font-size:12px;margin:12px 0;color:var(--muted)}
.fade-in{animation:enter .22s ease-out}
.reversed-img{transform:rotate(180deg)}
.storage-warning{font-size:12px;color:var(--error);background:var(--error-bg);padding:10px 15px;border-radius:9px;margin:10px 0}
.checklist{list-style:none;padding:0;margin:15px 0}
.checklist li{margin:10px 0;font-size:13px}
.no-break{white-space:nowrap}
@keyframes enter{from{opacity:0;transform:translateY(7px)}
to{opacity:1;transform:translateY(0)}
}

@media(min-width:800px){.sheet{border-radius:22px;max-height:88dvh;margin:auto}
.modal-backdrop{align-items:center;padding:30px}
.library-grid{grid-template-columns:repeat(4,1fr)}
.hero{padding:10px 0 25px}
.studycall{margin-top:5px}
.spread-board{max-width:560px;margin-left:auto;margin-right:auto}

.navitem{min-height:68px}
.study-shell{padding-bottom:70px}
}

@media(max-width:600px){.shell{padding:0 24px calc(112px + var(--safe))}
.topbar{height:73px}
.brand{font-size:15px;letter-spacing:0}
.toplinks{gap:2px}
.badge{padding:4px 8px;font-size:10px}
.hero{display:flex;flex-direction:column;align-items:stretch;min-height:0;gap:2px;padding-top:13px}
.hero .eyebrow{font-size:10px;margin-bottom:9px}
.hero h1{font-size:29px;line-height:1.4}
.hero p{font-size:13px;margin-top:10px;max-width:none}
.fan{height:255px;margin:7px 0 20px}
.fan img{width:105px;height:183px;border-width:4px}
.fan img:nth-child(1){transform:translateX(-74px) rotate(-14deg)}
.fan img:nth-child(2){transform:translateX(74px) rotate(14deg)}
.fan img:nth-child(3){width:119px;height:207px;transform:translateY(-4px)}
.fanlabel{bottom:0;font-size:10px}
.studycall{padding:24px 0;gap:16px;align-items:center;flex-wrap:wrap}
.studycall h2{font-size:19px}
.studycall p{font-size:14px;max-width:none}
.studycall .primary{padding:12px 20px;min-height:52px;font-size:16px;width:100%}
.mini-stats{padding:21px 0}
.mini-stats>div{padding-left:14px}
.mini-stats strong{font-size:22px}
.mini-stats span{font-size:10px;display:block}
.feature-grid{gap:0;grid-template-columns:1fr}
.feature{padding:24px 0;display:flex;min-height:96px}
.feature .feature-icon{width:31px;height:31px;margin-bottom:12px}
.feature h3{font-size:18px}
.feature p{font-size:14px;margin-top:4px}
.feature .arrow{display:none}
.section{margin-top:26px}
.sectionhead{margin-bottom:13px}
.sectionhead h2{font-size:18px}
.pagehead{margin-top:19px}
.pagehead h1{font-size:28px}
.home-simple{margin-top:24px}
.home-simple>h1{font-size:30px}
.home-simple>p{font-size:14px}
.home-decisions{grid-template-columns:minmax(0,1fr);gap:14px;margin-top:26px}
.home-learning-support{grid-column:1;grid-row:2}.reading-choice{grid-column:1;grid-row:3}.learn-choice{grid-column:1;grid-row:1}
.home-learning-actions{margin-top:0}
.home-choice{min-height:0;display:grid;grid-template-rows:auto;grid-template-columns:minmax(76px,110px) minmax(0,1fr);align-items:center;padding:18px;column-gap:17px}
.home-choice-art,.home-spread-art{height:130px;grid-row:1;grid-column:1}
.home-choice-art img{height:115px}
.home-choice-art img:first-child{transform:translateX(-19px) rotate(-7deg)}
.home-choice-art img:last-child{transform:translateX(19px) rotate(7deg)}
.home-spread-art{gap:6px}
.home-spread-art i{width:31px}
.home-choice-copy{display:flex;flex-direction:column;gap:5px;grid-row:1;grid-column:2;margin-top:0;padding-right:0}
.home-choice-copy small{padding-top:0}
.home-choice-copy>span{font-size:12px}
.home-choice-copy strong{font-size:21px}
.home-choice>.icon{position:static;grid-column:2;grid-row:2;margin-top:6px}
.home-learning-actions .continue-resume{max-width:100%;text-align:left;overflow-wrap:anywhere}
.learning-progress{grid-template-columns:1fr 1fr;padding:16px}
.learning-progress .secondary{grid-column:1/-1;width:100%}
.knowledge-grid{grid-template-columns:1fr 1fr;gap:9px}
.knowledge-grid button{padding:14px;min-height:120px}
.library-grid{grid-template-columns:repeat(2,1fr);gap:13px}
.library-card{padding:9px;border-radius:13px}
.library-card h3{font-size:15px;margin-top:5px}
.library-card p{font-size:12px;min-height:58px}
.library-card img{border-radius:6px}
.chips{gap:7px;margin:17px 0 23px}
.chip{font-size:11px;padding:6px 12px;min-height:44px}
.study-shell{padding:0 21px 32px}
.study-top{height:66px;gap:10px}
.study-top .iconbtn{margin-left:-9px}
.study-grid{display:block;padding-top:0}
.question-card{width:115px;margin:8px auto}
.question-card.covered:after{font-size:8px;padding:2px}
.question-visual .eyebrow{font-size:10px}
.card-caption{font-size:10px;margin-top:6px}
.question-main{margin-top:20px}
.question-main h2{font-size:19px}
.question-main .eyebrow{font-size:10px}
.context{font-size:12px;margin-top:7px}
.options{margin-top:17px;gap:9px}
.option{font-size:16px;padding:12px;gap:11px;min-height:57px}
.letter{width:24px;height:24px;font-size:10px}
.answer-feedback{margin-top:19px;padding-top:17px}
.answer-feedback p{font-size:13px}
.sheet{padding-left:22px;padding-right:22px}
.detail-hero{grid-template-columns:110px 1fr;gap:18px}
.detail-hero img{width:110px}
.detail-hero p{font-size:13px}
.detail-section .clue{gap:10px}
.clue strong{flex-basis:63px;font-size:12px}
.clue span{font-size:12px}
.spread-board{gap:13px}
.spread-hero{padding:19px}
.spread-intro h1{font-size:23px}
.spread-name{font-size:11px}
.spread-label{font-size:11px}
.spread-hero h2{font-size:18px}
.practice-row{padding:21px 0}
.statbox{padding:17px}
.statbox strong{font-size:25px}
.complete{margin-top:20px}
.backstage h1{font-size:26px}
}

@media(max-width:360px){.shell{padding-left:20px;padding-right:20px}
.brand{font-size:14px}
.studycall{padding:20px 0}
.studycall h2{font-size:17px}
.studycall .primary{padding:10px}
.study-shell{padding-left:16px;padding-right:16px}
.option{font-size:16px}
}

@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* Status messages should never block the controls beneath them. */
.toast{pointer-events:none}

:root{color-scheme:light}

.language-toggle{position:fixed;top:max(14px,env(safe-area-inset-top));right:14px;z-index:45;min-width:44px;min-height:44px;padding:9px;border:1px solid var(--paper);border-radius:50%;background:var(--glass);color:var(--accent);font:600 12px var(--font-body);box-shadow:var(--shadow-float);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}

.toplinks{margin-right:48px}

html[lang="en"] .brand{white-space:nowrap;letter-spacing:.2px}

.study-top{padding-right:52px}

html[lang="en"] .feature h3{font-size:17px;line-height:1.4}

html[lang="en"] .reading-label{overflow-wrap:anywhere;line-height:1.35}

html[lang="en"] .learn-cta{flex-wrap:wrap;gap:12px}

html[lang="en"] .reading-slot small{overflow-wrap:anywhere;line-height:1.4}


/* Glass belongs to floating controls; reading surfaces stay opaque. */
.study-top>.iconbtn,.spread-intro>.iconbtn,.sheethead>.iconbtn{background:var(--glass);box-shadow:var(--shadow-float);border:1px solid var(--paper)}
html[lang="en"] .eyebrow{text-transform:none;letter-spacing:.04em}
html[lang="zh-CN"] .eyebrow{letter-spacing:0}
.iconbtn,.chip,.segmented button,summary{min-height:44px}
.primary,.secondary,.option{font-size:16px}
.feature:focus-visible{outline-offset:3px}
.reading-focus .topbar{display:none}
.reading-focus .spread-intro{padding-top:24px;padding-right:44px;margin-top:0}
.reading-focus{padding-bottom:40px}
@media(prefers-reduced-transparency:reduce),(prefers-contrast:more){
 :root{--glass:var(--paper);--control-line:var(--accent)}
 .bottomnav,.language-toggle{backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--control-line)}
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
 .bottomnav,.language-toggle{background:var(--paper);border-color:var(--line)}
}
@media(forced-colors:active){
 .bottomnav,.language-toggle,.primary,.secondary,.option{border:1px solid ButtonText}
 .navitem.active{outline:2px solid Highlight}
}