/* The quiet study shares the application header and navigation; no nested phone shell. */
.rc-shell{--rc-paper:#f7f3ea;--rc-ink:#244b3d;--rc-text:#25382f;--rc-muted:#647065;--rc-line:#d9d9c9;--rc-soft:#e9eadf;--rc-white:#fffdf7;--rc-reading:18px;max-width:740px;margin:0 auto;padding:24px 0 46px;font:400 14px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--rc-text);min-width:0}
.rc-shell *{box-sizing:border-box}.rc-shell [hidden]{display:none!important}.rc-shell h1,.rc-shell h2,.rc-shell h3,.rc-shell p{margin:0}.rc-shell h1,.rc-shell h2,.rc-shell h3{font-family:Georgia,"Songti SC",serif;font-weight:400;letter-spacing:0}.rc-shell h1{font-size:32px;line-height:1.35;white-space:pre-line;letter-spacing:-.4px}.rc-shell h2{font-size:24px;line-height:1.4}.rc-shell h3{font-size:20px;line-height:1.5}.rc-shell button,.rc-shell select,.rc-shell input,.rc-shell textarea{font:inherit;color:inherit}.rc-shell button{cursor:pointer;white-space:normal;min-height:44px;line-height:1.5;box-shadow:none;margin:0;transition:none}.rc-shell button:disabled{opacity:.5;cursor:default}.rc-shell button:focus-visible,.rc-shell select:focus-visible,.rc-shell textarea:focus-visible{outline:3px solid #af774a;outline-offset:3px}.rc-shell select{min-width:0;max-width:100%;min-height:44px;border:1px solid var(--rc-line);border-radius:6px;background:var(--rc-paper);padding:8px 10px;font-size:14px}.rc-shell textarea{width:100%;min-height:250px;padding:12px;border:1px solid var(--rc-line);background:var(--rc-white);font-size:16px}.rc-content{min-width:0}.rc-button,.rc-primary{border:1px solid var(--rc-line);border-radius:7px;padding:11px 16px;background:transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14px;text-decoration:none;min-width:44px}.rc-primary{background:var(--rc-ink);border-color:var(--rc-ink);color:var(--rc-paper)!important;min-height:48px!important}.rc-link{border:0;border-radius:0;padding:9px 0;background:transparent;text-decoration:none;color:var(--rc-ink);font-size:13px;min-width:44px;text-align:left}.rc-note{font-size:13px;line-height:1.8;color:var(--rc-muted);margin:10px 0!important;overflow-wrap:anywhere}.rc-kicker{font-size:12px;letter-spacing:.9px;color:var(--rc-muted);margin:0 0 8px!important}.rc-heading{margin:5px 0 22px}.rc-languages{display:flex;gap:24px;border-bottom:1px solid var(--rc-line);margin:0 0 28px}.rc-language{min-height:44px;background:transparent;border:0;border-radius:0;border-bottom:2px solid transparent;padding:0 0 12px;color:var(--rc-muted);font-size:14px}.rc-language[aria-pressed=true]{border-bottom-color:var(--rc-ink);color:var(--rc-ink)}
.rc-continue{margin:24px 0 30px;padding:26px;background:var(--rc-ink);border-radius:12px;color:var(--rc-paper);position:relative;overflow:hidden}.rc-continue:after{content:"";position:absolute;width:160px;height:160px;border:1px solid #f7f3ea22;border-radius:50%;right:-35px;top:-60px;pointer-events:none}.rc-continue h2{font-size:29px;margin-bottom:8px}.rc-continue>p:not(.rc-eyebrow){font-size:13px;color:#e4e9df}.rc-eyebrow{font-size:11px;letter-spacing:1.3px;margin-bottom:12px!important}.rc-continue-button{display:flex;align-items:center;justify-content:space-between;width:100%;background:var(--rc-paper);color:var(--rc-ink)!important;border:1px solid var(--rc-paper);border-radius:7px;padding:12px 16px;min-height:48px!important;margin-top:23px!important;font-weight:500}.rc-section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin:20px 0 10px}.rc-section-heading h2{font-size:22px}.rc-section-heading>span{font-size:12px;color:var(--rc-muted)}.rc-book-row{border:0;border-bottom:1px solid var(--rc-line);border-radius:0;display:flex;align-items:center;width:100%;gap:16px;text-align:left;padding:18px 0;background:transparent;min-height:104px!important}.rc-book-cover{width:48px;height:66px;flex-shrink:0;display:flex;align-items:center;justify-content:center;border-left:3px solid var(--rc-ink);background:var(--rc-soft);font:20px Georgia,serif;color:var(--rc-ink)}.rc-book-copy{min-width:0;flex:1}.rc-book-copy strong{display:block;font-size:16px;font-weight:500}.rc-book-copy small{display:block;color:var(--rc-muted);font-size:12px;line-height:1.8;margin-top:3px}.rc-book-copy small+small{color:var(--rc-ink)}.rc-arrow{font-size:19px;color:var(--rc-ink)}.rc-bottom-note{font-size:12px;color:var(--rc-muted);margin:25px 0!important}.rc-lesson-list{list-style:none;padding:0;margin:20px 0}.rc-lesson-row{width:100%;display:flex;align-items:center;gap:16px;text-align:left;border:0;border-bottom:1px solid var(--rc-line);border-radius:0;background:transparent;padding:19px 0;min-height:89px!important}.rc-lesson-number{font:22px Georgia,serif;color:var(--rc-muted);width:28px;flex-shrink:0}.rc-lesson-copy{flex:1;min-width:0}.rc-lesson-copy strong{display:block;font:20px/1.4 Georgia,serif}.rc-lesson-copy small{display:block;font-size:13px;color:var(--rc-muted);margin-top:4px}.rc-lesson-mark{font-size:12px;color:var(--rc-ink);flex-shrink:0}.rc-loading{font-size:14px;color:var(--rc-muted);padding:35px 0!important}.rc-error{border-left:3px solid #a25940;background:#eee6d7;padding:16px;margin:20px 0;font-size:14px;color:var(--rc-text)}.rc-error .rc-button{margin-top:12px}.rc-save-status{display:flex;flex-wrap:wrap;align-items:center;gap:4px 18px;border-top:1px solid var(--rc-line);font-size:12px;color:var(--rc-muted);padding-top:17px;margin-top:30px!important}.rc-save-status>span{display:block}.rc-storage-error{color:#8a3929;font-size:13px;line-height:1.8;overflow-wrap:anywhere}.rc-save-status .rc-storage-error{flex-basis:100%}
.rc-reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:-9px 0 10px}.rc-reader-heading{margin:3px 0 7px}.rc-reader-heading h1{font-size:30px}.rc-title-zh{font-size:14px;color:var(--rc-muted);margin-bottom:13px!important}.rc-tabs{display:flex;gap:26px;border-bottom:1px solid var(--rc-line);margin:18px 0}.rc-tab{min-height:44px;border:0;border-bottom:2px solid transparent;border-radius:0;padding:8px 0;background:transparent;font-size:14px;color:var(--rc-muted)}.rc-tab[aria-pressed=true]{border-bottom-color:var(--rc-ink);color:var(--rc-ink)}.rc-audio{background:var(--rc-soft);color:var(--rc-text);border-radius:10px;padding:16px;margin:18px 0 24px;scroll-margin-top:100px}.rc-audio-top{display:flex;align-items:center;gap:12px}.rc-audio-top>div{min-width:0;flex:1}.rc-audio-top strong{font-size:14px;font-weight:500;display:block}.rc-audio-top small{display:block;font-size:11px;color:var(--rc-muted);margin-top:3px}.rc-play{min-width:48px;border:1px solid var(--rc-ink);border-radius:7px;background:var(--rc-ink);color:var(--rc-paper)!important;padding:9px 12px;font-size:13px}.rc-rate{border:0;border-radius:0;background:transparent;min-width:44px;padding:8px;font-size:13px}.rc-audio audio{display:block;width:100%;min-height:44px;margin-top:12px}.rc-audio .rc-note{font-size:12px;margin-bottom:0!important}.rc-reader-content{margin-bottom:26px}.rc-paragraph{display:grid;grid-template-columns:27px minmax(0,1fr);gap:9px;padding:17px 0 23px;border-bottom:1px solid #7a897d33}.rc-paragraph-focus{font:13px Georgia,serif;background:transparent;color:var(--rc-muted);border:0;border-radius:0;padding:6px 0;align-self:start;min-width:27px}.rc-source{font:400 var(--rc-reading)/1.9 Georgia,serif;color:var(--rc-muted);overflow-wrap:anywhere;letter-spacing:.05px}.rc-current .rc-source{font-size:calc(var(--rc-reading) + 4px);line-height:1.85;color:var(--rc-text)}.rc-word{font:inherit!important;line-height:inherit!important;color:inherit;background:transparent;border:0;border-radius:0;padding:0 1px;min-height:44px!important;min-width:0;text-align:left;vertical-align:baseline}.rc-word:hover,.rc-word:focus-visible{text-decoration:underline;text-decoration-style:dotted;text-underline-offset:5px}.rc-highlight{background:#dce4d260;color:var(--rc-ink);text-decoration:underline;text-decoration-color:#8c9d8566;text-underline-offset:5px;text-decoration-thickness:1px}.rc-translation,.rc-recite{border-top:1px solid var(--rc-line);margin-top:24px}.rc-translation summary,.rc-recite summary{font-size:14px;min-height:48px;padding:13px 0;color:var(--rc-ink);cursor:pointer}.rc-translation-text{font-size:14px;line-height:2;margin:12px 0 20px!important;white-space:pre-wrap}.rc-shell[data-translation=hide] .rc-translation{display:none}.rc-shell[data-translation=blur] .rc-translation-text{filter:blur(5px);user-select:none}.rc-recite .rc-source{margin:15px 0 24px!important;color:var(--rc-text)}.rc-section-title{font-size:22px!important;margin:25px 0 10px!important}.rc-pattern{padding:17px 0;border-bottom:1px solid var(--rc-line)}.rc-pattern h3{font-size:22px;margin:5px 0 9px}.rc-pattern>p{font-size:14px;line-height:1.9}.rc-code{font-size:12px;color:var(--rc-muted)}.rc-logic{font-size:16px;line-height:2.1;white-space:pre-wrap;margin:18px 0!important}.rc-mini{position:fixed;z-index:18;left:50%;transform:translateX(-50%);bottom:calc(88px + env(safe-area-inset-bottom));width:calc(100% - 40px);max-width:700px;display:flex;align-items:center;gap:12px;background:var(--rc-ink);color:var(--rc-paper);padding:7px 12px;border-radius:9px;box-shadow:0 8px 24px #14271f26}.rc-mini button{background:transparent;border:0;color:inherit;border-radius:0;padding:7px}.rc-mini-play{font-size:12px;flex-shrink:0}.rc-mini-title{font:17px Georgia,serif!important;text-align:left;flex:1;overflow-wrap:anywhere}
.rc-shell[data-theme=coffee][data-view=reader]{--rc-paper:#e9decb;--rc-text:#493a2b;--rc-muted:#725b43;--rc-line:#cfc1aa;--rc-soft:#ddd2bf;--rc-ink:#4d4b32}.rc-shell[data-theme=white][data-view=reader]{--rc-paper:#fff;--rc-white:#fff;--rc-text:#26382f;--rc-line:#d8ddd8;--rc-soft:#edf0eb}.rc-shell[data-theme=night][data-view=reader]{--rc-paper:#24332d;--rc-text:#ede9df;--rc-muted:#bac7bc;--rc-line:#526057;--rc-soft:#34453b;--rc-white:#2d3d33;--rc-ink:#d4dfc7}.rc-shell[data-view=reader]{background:var(--rc-paper);padding:16px 18px 38px;margin-left:-18px;margin-right:-18px;max-width:776px}.rc-shell[data-theme=night][data-view=reader] .rc-highlight{background:#5970484d}.rc-shell[data-theme=night][data-view=reader] .rc-play,.rc-shell[data-theme=night][data-view=reader] .rc-primary{background:#d4dfc7;color:#24332d!important}.rc-shell[data-theme=night][data-view=reader] .rc-mini{background:#d4dfc7;color:#24332d}.rc-shell[data-theme=night][data-view=reader] .rc-error{background:#493e31;color:#ede9df}
.rc-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:18px 0 22px;border-bottom:1px solid var(--rc-line);margin:16px 0 20px}.rc-stats strong{display:block;font:32px Georgia,serif;color:var(--rc-ink)}.rc-stats span{font-size:13px;color:var(--rc-muted)}.rc-filters{display:grid;grid-template-columns:1fr 1.5fr;gap:8px;margin:17px 0}.rc-filters select:last-child{grid-column:1/-1;font-size:14px}.rc-word-tools{display:flex;gap:8px 20px;flex-wrap:wrap;border-bottom:1px solid var(--rc-line);padding:13px 0;margin:13px 0 0}.rc-word-row{display:flex;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid var(--rc-line)}.rc-word-open{flex:1;text-align:left;min-width:0;border:0;border-radius:0;background:transparent;padding:0}.rc-word-open strong{display:block;font:24px/1.4 Georgia,serif;color:var(--rc-ink)}.rc-word-open small{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font:13px/1.75 Georgia,serif;color:var(--rc-muted);margin-top:6px;overflow-wrap:anywhere}.rc-word-state{background:transparent;border:0;border-radius:0;font-size:12px;min-width:65px;padding:7px 0;flex-shrink:0;color:var(--rc-muted)}.rc-empty{padding:30px 0!important;font-size:14px;line-height:1.9;color:var(--rc-muted)}.rc-pagination{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:20px;font-size:13px}.rc-pagination select{font-size:13px}.rc-review-intro{font-size:14px;line-height:1.9;color:var(--rc-muted);margin:25px 0!important}.rc-review-count{font-size:12px;color:var(--rc-muted);text-align:right}.rc-flashcard{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;width:100%;min-height:350px;border:1px solid var(--rc-line);border-radius:12px;background:var(--rc-white);padding:30px 24px;margin:20px 0!important;color:var(--rc-text);touch-action:pan-y}.rc-flash-word{font:38px/1.3 Georgia,"Songti SC",serif;overflow-wrap:anywhere;max-width:100%;font-weight:400}.rc-flash-context{font:19px/1.8 Georgia,serif;overflow-wrap:anywhere;margin:24px 0!important}.rc-flashcard>small{font-size:12px;color:var(--rc-muted);margin-top:22px}.rc-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.rc-actions>.rc-button,.rc-actions>.rc-primary{flex:1}.rc-finish-title{font-size:28px!important;margin:35px 0 14px!important}.rc-download-tools{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 24px}.rc-download-tools .rc-primary{flex:1}.rc-download-row{padding:21px 0;border-bottom:1px solid var(--rc-line)}.rc-download-row h3{font-size:20px}.rc-download-row .rc-actions{margin-top:13px}.rc-download-row .rc-actions>.rc-button{flex:0 1 auto}
.rc-overlay{position:fixed;inset:0;z-index:100;background:#14271f70;display:flex;align-items:flex-end;justify-content:center;padding:12px 12px 0}.rc-sheet{width:100%;max-width:580px;max-height:88dvh;overflow-y:auto;overscroll-behavior:contain;border-radius:20px 20px 0 0;background:#f7f3ea;color:#25382f;padding:18px 25px calc(26px + env(safe-area-inset-bottom));box-shadow:0 -8px 40px #14271f26;scrollbar-width:thin}.rc-sheet:before{content:"";display:block;width:34px;height:3px;margin:0 auto 8px;background:#b8c0b2;border-radius:3px}.rc-sheet-heading{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:0 0 17px}.rc-sheet-heading h2{font-size:24px}.rc-sheet .rc-button{color:#244b3d;border-color:#d9d9c9}.rc-sheet .rc-primary{background:#244b3d;color:#f7f3ea!important;border-color:#244b3d;display:flex;width:100%;margin-top:20px}.rc-sheet .rc-link{color:#244b3d}.rc-sheet .rc-note{color:#647065}.rc-dictionary-word{font:38px/1.3 Georgia,serif!important;margin:10px 0 8px!important;overflow-wrap:anywhere}.rc-definition{font-size:17px;line-height:1.9;margin:18px 0 10px!important}.rc-definition-source{font:16px/1.8 Georgia,serif;margin:10px 0!important;overflow-wrap:anywhere}.rc-context{font:18px/1.8 Georgia,serif;border-left:2px solid #d9d9c9;padding:4px 0 4px 15px;margin:22px 0;overflow-wrap:anywhere}.rc-setting-row{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid #d9d9c9;font-size:14px}.rc-setting-row>span:first-child{margin-right:auto}.rc-themes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin:15px 0 25px}.rc-theme{border:1px solid #d9d9c9;border-radius:6px;padding:10px 4px;min-height:64px!important;font-size:13px}.rc-theme[aria-pressed=true]{outline:2px solid #244b3d;outline-offset:2px}.rc-theme-paper{background:#f7f3ea;color:#25382f!important}.rc-theme-coffee{background:#e9decb;color:#493a2b!important}.rc-theme-white{background:#fff;color:#26382f!important}.rc-theme-night{background:#24332d;color:#ede9df!important}.rc-confirm-copy{font-size:15px;line-height:1.9;margin:12px 0 22px!important}.rc-conflict{padding:15px 0;border-bottom:1px solid #d9d9c9}.rc-conflict h3{font-size:18px;margin-bottom:10px}.rc-conflict p{font-size:14px;margin:5px 0!important}.rc-conflict button{margin:10px 10px 0 0}.rc-toast{position:fixed;z-index:110;left:50%;transform:translateX(-50%);bottom:calc(154px + env(safe-area-inset-bottom));width:max-content;max-width:calc(100% - 40px);border-radius:8px;background:#25382f;color:#f7f3ea;padding:12px 17px;font-size:13px;text-align:center;pointer-events:none}
/* Only the new four-destination navigation receives these outer-shell adjustments. */
.bottom-nav.study-navigation button{max-width:140px;min-height:54px;font-size:16px}.bottom-nav.study-navigation button>span{font-size:12px}.masthead.study-masthead .brand-mark{font-style:italic}.masthead.study-masthead .edition{display:none}
@media(min-width:800px){.rc-shell[data-view=home] .rc-heading{margin-top:12px}.rc-shell[data-view=home] .rc-heading h1{font-size:36px}.rc-continue{padding:29px 31px}.rc-book-row{gap:20px}.rc-overlay{align-items:center;padding:24px}.rc-sheet{border-radius:18px;max-height:85dvh;padding-bottom:25px}.rc-shell[data-view=reader]{margin-left:auto;margin-right:auto;padding-left:22px;padding-right:22px}.rc-word-tools{gap:24px}}
@media(max-width:440px){.rc-shell{padding-top:21px}.rc-shell h1{font-size:30px}.rc-continue{padding:23px}.rc-continue h2{font-size:27px}.rc-book-row{gap:14px}.rc-book-copy strong{font-size:15px}.rc-book-copy small{font-size:12px}.rc-reader-heading h1{font-size:28px}.rc-tabs{gap:19px}.rc-tab{font-size:13px}.rc-audio{padding:13px}.rc-audio-top{gap:9px}.rc-audio-top small{font-size:10px}.rc-play{font-size:12px;padding:8px}.rc-paragraph{grid-template-columns:23px minmax(0,1fr);gap:6px}.rc-current .rc-source{font-size:calc(var(--rc-reading) + 4px)}.rc-sheet{padding-left:21px;padding-right:21px}.rc-flashcard{padding:25px 20px;min-height:345px}.rc-flash-word{font-size:34px}.rc-flash-context{font-size:18px}.rc-mini{width:calc(100% - 28px)}}
@media(max-width:360px){.rc-continue{padding:20px}.rc-continue h2{font-size:25px}.rc-reader-heading h1{font-size:26px}.rc-word-row{gap:9px}.rc-word-state{min-width:58px;font-size:11px}.rc-audio-top strong{font-size:13px}.rc-audio-top small{font-size:10px}.rc-audio-top{gap:8px}.rc-rate{padding:5px;min-width:37px}.rc-themes{gap:6px}.rc-sheet{padding-left:17px;padding-right:17px}.rc-setting-row{gap:6px}.rc-setting-row .rc-button{padding:9px}.rc-tabs{gap:15px}.rc-tab{font-size:12px}.rc-filters{grid-template-columns:1fr 1.2fr}}
@media(prefers-reduced-motion:reduce){.rc-shell *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.rc-word-phonetic{display:block;font:13px/1.7 -apple-system,BlinkMacSystemFont,sans-serif;color:var(--rc-muted);margin:4px 0}.rc-word-meaning{display:block;font:14px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:var(--rc-text);margin:4px 0 8px}.rc-word-open small{font-size:12px;color:var(--rc-muted)}
/* One native audio element stays connected across study views. */
.rc-mini{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:0 8px;padding:7px 10px 2px}.rc-mini .rc-mini-play,.rc-mini .rc-mini-rate{width:44px;min-width:44px;min-height:44px;padding:5px;font-size:12px}.rc-mini .rc-mini-title{display:block;min-width:0;min-height:44px;padding:3px 0;text-align:left;font-size:15px!important;line-height:1.45!important;overflow:hidden}.rc-mini-title>span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rc-mini-title>small{display:block;font:11px/1.5 -apple-system,BlinkMacSystemFont,sans-serif;opacity:.85;font-variant-numeric:tabular-nums;margin-top:2px}.rc-mini-seek{grid-column:1/-1;width:100%;min-width:0;min-height:44px;height:44px;padding:0;margin:0;accent-color:#d4dfc7;background:transparent}.rc-shell[data-theme=night][data-view=reader] .rc-mini-seek{accent-color:#244b3d}.rc-mini-seek:focus-visible{outline:3px solid #af774a;outline-offset:1px}.rc-reader-tail{min-width:0}
/* Keep the last actions reachable above the visible floating player. */
.rc-shell:has(>.rc-mini:not([hidden])){padding-bottom:calc(156px + env(safe-area-inset-bottom))}.rc-shell .rc-save-status,.rc-shell .rc-save-status .rc-link{scroll-margin-bottom:calc(210px + env(safe-area-inset-bottom))}