/* Leitor Imersivo v2 — clean, light, mobile-first. */
body.nr-open{overflow:hidden}
#nature-reader, #nature-reader *{box-sizing:border-box}
#nature-reader{position:fixed;inset:0;z-index:50000;background:#f7f9f5;color:#24483f;font-family:'DM Sans',sans-serif}
#nature-reader button,#nature-reader textarea{font:inherit}
#nature-reader button{cursor:pointer}
#nature-reader button:disabled{opacity:.35;cursor:not-allowed}
.nr2-shell{height:100dvh;display:flex;flex-direction:column;min-height:0;overflow:hidden}
.nr2-top{height:65px;min-height:65px;background:#fff;border-bottom:1px solid #e2eae3;display:flex;align-items:center;gap:16px;padding:8px 20px}
.nr2-top>div:nth-child(2){display:flex;flex-direction:column;flex:1;min-width:0}
.nr2-top strong{font-size:16px;letter-spacing:-.02em}.nr2-top small{color:#718980;font-size:11px;margin-top:3px}
.nr2-top button,.nr2-book-nav button,.nr2-lesson-nav button,.nr2-side-tabs button{border:1px solid #dfebe2;border-radius:12px;background:white;color:#345b50;padding:9px 12px;font-size:12px;font-weight:700}
.nr2-back{white-space:nowrap;color:white!important;background:#24594b!important;border-color:#24594b!important}
.nr2-top-controls{display:flex;gap:6px}.nr2-mobile-toggle{display:none}
.nr2-layout{flex:1;min-height:0;display:grid;grid-template-columns:minmax(270px,.92fr) minmax(340px,1.35fr) minmax(238px,.68fr);gap:12px;padding:12px;overflow:hidden}
.nr2-book,.nr2-reading,.nr2-side{background:#fff;border:1px solid #e0e8df;border-radius:19px;min-height:0;box-shadow:0 3px 14px rgba(36,82,65,.04)}
.nr2-book{display:flex;flex-direction:column;padding:13px;gap:8px}
.nr2-book-heading{display:flex;justify-content:space-between;font-size:11px;font-weight:800;letter-spacing:.08em;color:#71877b;gap:10px}
.nr2-paper{background:#f5f4ef;flex:1;min-height:0;overflow:auto;display:flex;justify-content:center;align-items:flex-start;padding:10px;border-radius:13px}
.nr2-paper img{display:block;max-width:100%;max-height:100%;object-fit:contain;height:auto;box-shadow:0 9px 32px #77847830;background:white;transition:transform .2s}
.nr2-paper img.nr2-zoom{max-height:none;max-width:none;width:140%;cursor:zoom-out}
.nr2-book-nav{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px}.nr2-book-nav button{padding:8px}
.nr2-reading{overflow-y:auto;display:flex;flex-direction:column;padding:23px 26px 22px}
.nr2-kicker{font-size:11px;font-weight:800;color:#6a9281;letter-spacing:.1em}.nr2-reading h2{font-family:Georgia,serif;font-size:27px;line-height:1.2;margin:10px 0;color:#183f36}
.nr2-coverage{padding:9px 13px;color:#587469;font-size:12px;line-height:1.6;border-radius:10px;background:#f0f5f0;border:1px solid #e6efe6;margin:0 0 15px}
.nr2-lines{display:flex;flex-direction:column;gap:8px;flex:1}
.nr2-line{display:flex;align-items:start;gap:10px;border:1px solid transparent;border-radius:11px;padding:8px;min-width:0;line-height:1.85;transition:background .1s}
.nr2-line:hover{background:#f6f9f4}.nr2-line.nr2-current{background:#eaf4ec;border-color:#d4eadc}
.nr2-sentence-audio{background:#e1efe6;color:#25624f;border:0;border-radius:100%;flex:0 0 31px;width:31px;height:31px;font-size:11px;font-weight:800;margin-top:2px}
.nr2-line-content{font-size:19px;color:#293e36;font-family:Georgia,'Times New Roman',serif;line-height:1.75;overflow-wrap:anywhere}
.nr2-word{display:inline!important;border:0!important;background:transparent!important;color:inherit!important;padding:0 1px!important;margin:0!important;box-shadow:none!important;border-radius:3px!important;text-decoration:none!important;font-size:inherit!important;font-family:inherit!important;font-weight:inherit!important}
.nr2-word.nr2-first{background:#e1ecfc!important;box-shadow:0 2px #8bb0d9!important}
.nr2-word.nr2-learning{border-bottom:2px solid #dfba78!important}.nr2-word.nr2-known{color:#597369!important}
.nr2-word.nr2-speaking-word{background:#f4dda6!important;color:#233d33!important}
.nr2-word:hover{background:#d9eede!important;color:#194e3d!important}
.nr2-lesson-nav,.nr2-write-actions{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;padding:16px 0 4px}.nr2-lesson-nav button{background:#f9fbf9}
.nr2-writing{margin-top:19px;border-top:1px solid #e5ebe5;padding-top:17px}.nr2-writing h3{margin:0 0 5px;font-size:15px}.nr2-writing p{margin:0 0 10px;font-size:12px;color:#637f72}
.nr2-writing textarea,.nr2-panel textarea{resize:vertical;border:1px solid #cfded1;border-radius:10px;background:#fff;width:100%;padding:11px;color:#233f33;min-height:70px;outline-color:#34745d}
.nr2-writing button,.nr2-primary,.nr2-soft{border:1px solid #cadecf;background:#f7fcf7;border-radius:10px;padding:10px 12px;color:#245d4a;font-weight:700;font-size:12px}
.nr2-primary{background:#245d4a;color:white}.nr2-soft{width:100%;margin:8px 0}
.nr2-side{display:flex;flex-direction:column;overflow:hidden}.nr2-side-tabs{padding:11px;display:grid;grid-template-columns:repeat(2,1fr);gap:6px;border-bottom:1px solid #ecf0ec}
.nr2-side-tabs button{font-size:11px;padding:8px 5px}.nr2-side-tabs button.on,.nr2-status button.on{background:#e1efe5;border-color:#b7d6c1;color:#174c3b}
.nr2-panel{overflow-y:auto;padding:17px 15px 24px;flex:1}.nr2-panel h3{font-family:Georgia,serif;color:#1f483a;margin:0 0 12px;font-size:20px}
.nr2-panel .nr2-help{font-size:11px;color:#6c8076;line-height:1.65;margin:8px 0 14px}
.nr2-vocab-stat{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}.nr2-vocab-stat span{background:#f4f8f4;border-radius:8px;padding:9px 4px;text-align:center;color:#6c8377;font-size:9px}.nr2-vocab-stat strong{display:block;font-size:20px;color:#234f40}
.nr2-word-grid{display:flex;flex-direction:column;gap:5px;max-height:40vh;overflow-y:auto}.nr2-word-grid button{display:flex;align-items:center;gap:8px;text-align:left;width:100%;padding:9px;border:1px solid #edf1ec;border-radius:9px;background:#fff;color:#23483c;min-width:0}
.nr2-word-grid button span{font-size:11px;margin-left:auto;color:#728378;overflow:hidden;text-overflow:ellipsis}.nr2-dot{width:8px;height:8px;border-radius:50%;background:#91b9dc;flex:0 0 auto}.nr2-dot.nr2-learning{background:#d8ac69}.nr2-dot.nr2-known{background:#61aa87}
.nr2-dict-title{display:flex;justify-content:space-between;gap:8px}.nr2-dict-title button{border-radius:100%;background:#e3f1e8;border:0;padding:8px 11px}
.nr2-translation{color:#1e5b47;font-size:15px;font-weight:800}.nr2-context{background:#f6f8f2;padding:12px;border-radius:10px;font-size:12px;line-height:1.6}.nr2-context p{font-family:Georgia,serif;margin:7px 0;color:#354a40}.nr2-label{font-size:11px;font-weight:700;color:#71877a}
.nr2-status{display:flex;flex-wrap:wrap;gap:4px}.nr2-status button{flex:1;min-width:58px;border:1px solid #e2eae1;background:white;color:#456557;border-radius:8px;padding:9px 6px;font-size:11px}
.nr2-review-item{padding:12px;border:1px solid #e8ece5;border-radius:12px;margin-bottom:10px}.nr2-review-item p{font-size:12px;font-family:Georgia,serif;line-height:1.5}.nr2-review-item small{color:#658678}.nr2-grade{display:flex;gap:5px;margin-top:9px}.nr2-grade button{flex:1;background:#f4f8f4;border:1px solid #e0e9e0;border-radius:9px;padding:7px 2px;font-size:11px;color:#315e4d}.nr2-stat{margin:0 0 16px}.nr2-stat>div:first-child{display:flex;justify-content:space-between;font-size:12px}.nr2-stat small{color:#71867d}.nr2-meter{margin-top:7px;background:#e9f0e9;border-radius:20px;height:8px;overflow:hidden}.nr2-meter i{display:block;height:100%;background:#4d9474}
.nr2-player{background:white;border-top:1px solid #dce6de;padding:8px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:69px}
.nr2-playbox{display:flex;align-items:center;gap:9px}.nr2-playbox button{border:1px solid #deebe1;background:#f7fbf7;color:#2c604f;border-radius:100%;width:34px;height:34px;font-size:12px}.nr2-playbox .nr2-bigplay{width:45px;height:45px;color:white;background:#245d4a;font-size:17px}.nr2-counter{white-space:nowrap;color:#688475;font-size:11px}
.nr2-speed{display:flex;background:#f4f8f4;padding:3px;border-radius:12px}.nr2-speed button{font-size:12px;border:0;background:none;border-radius:8px;padding:9px 13px;color:#537566}.nr2-speed button.on{background:#245f49;color:white}
.nr2-player-options{display:flex;align-items:center;gap:11px}.nr2-player-options label{white-space:nowrap;font-size:11px;font-weight:600;color:#456c58;display:flex;align-items:center;gap:4px}.nr2-player-options button{border:1px solid #bed6c7;border-radius:11px;padding:9px;background:#f5fbf6;color:#245f49;font-size:11px;font-weight:800}
.nr2-feedback{font-size:11px;padding:7px 15px;background:#edf4ef;color:#527765;min-height:27px;white-space:normal}
.nr2-mobile-toggle{background:#fff;border-bottom:1px solid #e4eae4;padding:7px 12px;gap:8px}.nr2-mobile-toggle button{border:1px solid #d7e7da;border-radius:10px;background:#fff;color:#456859;flex:1;padding:8px}.nr2-mobile-toggle button.on{background:#245b48;color:white}
@media(max-width:1100px){.nr2-layout{grid-template-columns:minmax(260px,1fr) minmax(330px,1.3fr)}.nr2-side{display:none}.nr2-reading{padding:18px}}
@media(max-width:680px){.nr2-top{height:54px;min-height:54px;padding:6px 9px;gap:6px}.nr2-top strong{font-size:13px}.nr2-top small{display:none}.nr2-top button{font-size:11px;padding:7px}.nr2-top-controls button:nth-child(1){display:none}.nr2-mobile-toggle{display:flex}.nr2-layout{display:block;padding:8px;overflow:auto}.nr2-book,.nr2-reading{display:none;box-shadow:none;min-height:calc(100% - 6px)}.nr2-book.nr2-mobile-visible,.nr2-reading.nr2-mobile-visible{display:flex}.nr2-book{padding:10px}.nr2-paper{min-height:calc(100dvh - 245px);align-items:flex-start}.nr2-paper img{max-height:none;width:100%}.nr2-reading{padding:17px 13px}.nr2-reading h2{font-size:23px}.nr2-line-content{font-size:17px}.nr2-side{display:block;margin-top:8px;min-height:160px;max-height:none;overflow:visible}.nr2-panel{max-height:300px;overflow:auto}.nr2-player{flex-wrap:wrap;justify-content:center;gap:4px 9px;padding:6px 8px}.nr2-playbox{flex:1;justify-content:space-between}.nr2-playbox .nr2-bigplay{width:37px;height:37px}.nr2-counter{font-size:10px}.nr2-speed button{padding:8px 9px;font-size:11px}.nr2-player-options{width:100%;justify-content:space-around;gap:4px}.nr2-player-options label{font-size:10px}.nr2-player-options button{padding:7px 8px}.nr2-feedback{font-size:10px;max-height:55px;overflow-y:auto}.nr2-lesson-nav{padding:13px 0}.nr2-writing{padding-top:10px;margin-top:12px}}
@media(max-width:360px){.nr2-top-controls button{padding:5px}.nr2-playbox button{width:28px;height:28px}.nr2-speed button{padding:6px 7px}.nr2-counter{font-size:9px}}
/* Vocabulary, notes and progress appear without losing the current sentence on compact screens. */
@media(min-width:681px) and (max-width:1100px){
 .nr2-side.nr2-floating{display:flex;position:fixed;top:76px;right:14px;bottom:92px;width:min(330px,44vw);z-index:7;box-shadow:0 12px 45px #1d4b382e}
}
@media(max-width:680px){
 .nr2-top-controls [data-nr2="panel-vocab"]{display:none}
 .nr2-side.nr2-floating{display:flex;flex-direction:column;position:fixed;left:9px;right:9px;bottom:128px;height:min(395px,59dvh);z-index:9;min-height:0;overflow:hidden;box-shadow:0 16px 50px #0d332b40;background:#fff}
 .nr2-side.nr2-floating .nr2-panel{flex:1;max-height:none;min-height:0;overflow-y:auto}
}
.nr2-side{position:relative}.nr2-x{display:none;border:1px solid #bed9c6;background:#fff;color:#28644d;border-radius:50%;width:31px;height:31px;font-size:20px;line-height:1}
@media(max-width:1100px){.nr2-side.nr2-floating .nr2-x{display:block;position:absolute;top:6px;right:7px;z-index:10}.nr2-side.nr2-floating .nr2-side-tabs{padding-right:42px}}

/* v1.15.1: legible facsimile, pan/zoom, responsive collapsible panels, live caption. */
#nature-reader .nr2-layout{grid-template-columns:minmax(390px,1.06fr) minmax(330px,.94fr) minmax(210px,.40fr);gap:10px}
#nature-reader .nr2-layout.nr2-pane-compact{grid-template-columns:minmax(390px,1.2fr) minmax(350px,1.04fr) 215px}
#nature-reader .nr2-layout.nr2-pane-wide{grid-template-columns:minmax(350px,1.1fr) minmax(320px,1.06fr) minmax(265px,.65fr)}
#nature-reader .nr2-layout.nr2-pane-hidden{grid-template-columns:minmax(400px,1.13fr) minmax(355px,1fr)}
#nature-reader .nr2-layout.nr2-pane-hidden .nr2-side{display:none!important}
#nature-reader .nr2-side[hidden]{display:none!important}
#nature-reader .nr2-book{padding:10px;min-width:0}
#nature-reader .nr2-paper-wrap{min-height:0;flex:1;position:relative;overflow:hidden;background:#f2f0e8;border-radius:12px}
#nature-reader .nr2-paper{display:block;position:absolute;inset:0;overflow:auto;padding:12px;background:#f2f0e8;scrollbar-width:thin;cursor:grab;touch-action:pan-x pan-y;overscroll-behavior:contain}
#nature-reader .nr2-paper.nr2-dragging{cursor:grabbing;user-select:none}
#nature-reader .nr2-page-stage{position:relative;width:100%;min-height:100%;display:block}
#nature-reader .nr2-paper img{display:block;max-width:none!important;max-height:none!important;object-fit:initial;height:auto!important;pointer-events:none;user-select:none;box-shadow:0 8px 23px #243f3133}
#nature-reader .nr2-book-nav{flex-wrap:wrap;gap:5px;min-height:42px}
#nature-reader .nr2-book-nav>span{white-space:nowrap;font-weight:800;color:#446254}
#nature-reader .nr2-zoom-tools{display:flex;gap:3px;align-items:center}
#nature-reader .nr2-zoom-tools button{padding:7px 9px;min-height:34px;min-width:32px}
#nature-reader .nr2-zoom-label{font-size:10px;display:flex;align-items:center;gap:5px;color:#537469}
#nature-reader #nr2-zoom-select{border:1px solid #c9ddcf;border-radius:8px;background:white;color:#245547;font-size:12px;padding:7px 4px;min-width:74px}
#nature-reader .nr2-follow-overlay{position:absolute;bottom:12px;left:14px;right:14px;border:1px solid #bed8c7;background:rgba(255,254,248,.96);box-shadow:0 6px 20px #103c292a;border-radius:12px;padding:11px 13px;max-height:38%;overflow:auto;pointer-events:none}
#nature-reader .nr2-follow-overlay[hidden]{display:none!important}
#nature-reader .nr2-follow-heading{font-size:10px;font-weight:800;color:#2a654f;display:flex;justify-content:space-between;gap:5px;letter-spacing:.03em}
#nature-reader .nr2-follow-text{font-family:Georgia,serif;font-size:15px;line-height:1.65;color:#1f3f34;margin:5px 0;overflow-wrap:anywhere}
#nature-reader .nr2-follow-word.nr2-follow-active{background:#ffe49f;border-radius:3px;box-shadow:0 1px 0 #cda552}
#nature-reader .nr2-follow-overlay small{display:block;font-size:9px;line-height:1.35;color:#62786d}
#nature-reader .nr2-panel-toggle{background:#f0f6f1!important;border-color:#bcd8c8!important}
#nature-reader .nr2-top{gap:12px;padding-inline:13px}
#nature-reader .nr2-top-controls{flex-wrap:wrap;justify-content:flex-end}
#nature-reader .nr2-voice-picker{display:flex;align-items:center;gap:5px;max-width:295px;min-width:156px}
#nature-reader .nr2-voice-picker label{font-size:10px;color:#58786b;white-space:nowrap;font-weight:800}
#nature-reader .nr2-voice-picker select{min-width:0;width:100%;padding:7px 5px;border:1px solid #cdded2;border-radius:9px;background:#fff;color:#255544;font-size:11px;max-width:225px}
#nature-reader .nr2-follow-toggle{background:#ecf7ee;border-color:#b4d8bf;color:#245941;font-size:11px}
@media(max-width:1250px) and (min-width:681px){
 #nature-reader .nr2-layout.nr2-pane-wide,#nature-reader .nr2-layout.nr2-pane-compact{grid-template-columns:minmax(330px,1.15fr) minmax(350px,1fr)}
 #nature-reader .nr2-side{display:none}
 #nature-reader .nr2-side.nr2-floating{display:flex;position:fixed;top:77px;right:14px;bottom:91px;width:min(335px,43vw);z-index:7;box-shadow:0 12px 40px #17372a35}
 #nature-reader .nr2-layout.nr2-pane-hidden{grid-template-columns:minmax(330px,1.12fr) minmax(350px,1fr)}
}
@media(max-width:680px){
 #nature-reader .nr2-layout,#nature-reader .nr2-layout.nr2-pane-compact,#nature-reader .nr2-layout.nr2-pane-wide,#nature-reader .nr2-layout.nr2-pane-hidden{display:block;padding:6px;overflow-y:auto}
 #nature-reader .nr2-top{height:auto;min-height:55px;flex-wrap:wrap;gap:5px;padding:5px 8px}
 #nature-reader .nr2-top>div:nth-child(2){min-width:110px}
 #nature-reader .nr2-top-controls{gap:4px}
 #nature-reader .nr2-top-controls button{padding:6px 7px;font-size:10px}
 #nature-reader .nr2-top-controls [data-nr2="first-toggle"],#nature-reader .nr2-top-controls [data-nr2="panel-progress"]{display:none}
 #nature-reader .nr2-top-controls [data-nr2="side-toggle"]{display:none}
 #nature-reader .nr2-mobile-toggle{padding:5px 9px}
 #nature-reader .nr2-paper-wrap{min-height:calc(100dvh - 270px)}
 #nature-reader .nr2-paper{padding:7px}
 #nature-reader .nr2-book{min-height:calc(100% - 8px);padding:8px}
 #nature-reader .nr2-book-nav>span{font-size:11px}
 #nature-reader .nr2-zoom-label span{display:none}
 #nature-reader .nr2-follow-overlay{left:8px;right:8px;bottom:8px;padding:8px 10px;max-height:30%}
 #nature-reader .nr2-follow-text{font-size:14px;line-height:1.45}
 #nature-reader .nr2-follow-heading{font-size:9px}
 #nature-reader .nr2-player{display:grid;grid-template-columns:1fr auto;gap:4px;padding:6px 7px;min-height:95px}
 #nature-reader .nr2-playbox{justify-content:flex-start;min-width:0}
 #nature-reader .nr2-voice-picker{grid-column:1 / -1;max-width:none;width:100%;order:0}
 #nature-reader .nr2-voice-picker select{max-width:none;flex:1}
 #nature-reader .nr2-speed{justify-self:end}
 #nature-reader .nr2-player-options{grid-column:1 / -1;width:auto;justify-content:space-between;gap:5px}
 #nature-reader .nr2-player-options label{font-size:9px}
 #nature-reader .nr2-player-options button{font-size:10px;padding:6px}
 #nature-reader .nr2-feedback{max-height:33px}
 #nature-reader .nr2-side.nr2-floating{bottom:153px}
 #nature-reader .nr2-reading{min-height:calc(100% - 8px)}
}
@media(max-width:390px){
 #nature-reader .nr2-top [data-nr2="panel-notes"]{display:none}
 #nature-reader .nr2-playbox{gap:5px}
 #nature-reader .nr2-counter{font-size:9px}
 #nature-reader .nr2-book-nav>span{display:none}
}

@media(max-width:680px){#nature-reader .nr2-top-controls [data-nr2="panel-vocab"]{display:inline-flex!important}#nature-reader .nr2-side:not(.nr2-floating){display:none!important}#nature-reader .nr2-side.nr2-floating{display:flex!important}}

/* v1.15.2: continuous listening UI, no change to the book/reading pane layout. */
#nature-reader .nr2-continuous-label{padding:8px 11px;border-radius:10px;background:#e6f2e8;border:1px solid #b9d6c4;color:#205940;font-weight:800;}
#nature-reader .nr2-continuous-label input{accent-color:#24624c;width:15px;height:15px;}
#nature-reader .nr2-continuous-note{font-size:10px;color:#537668;white-space:nowrap;font-weight:700;}
#nature-reader .nr2-bigplay:focus-visible,#nature-reader .nr2-continuous-label:focus-within{outline:3px solid #e8b956;outline-offset:2px;}
@media(max-width:1250px){#nature-reader .nr2-continuous-note{display:none;}}
@media(max-width:680px){#nature-reader .nr2-continuous-label{padding:6px 8px;}#nature-reader .nr2-player-options{flex-wrap:wrap;}#nature-reader .nr2-player-options label{min-height:30px;}}

/* v1.16.1 — Mobile reader: compact toolbar and on-demand audio controls.
   No changes to desktop learning flow or persisted exercise/chapter keys. */
.nr2-back-short,.nr2-mobile-icon,.nr2-audio-settings-head{display:none}
.nr2-audio-trigger{display:none}
.nr2-audio-settings{display:contents}
#nature-reader .nr2-audio-settings-head{display:none}
@media(max-width:680px){
 #nature-reader .nr2-shell{min-height:0;overflow:hidden;position:relative}
 #nature-reader .nr2-top{flex:none;height:48px;min-height:48px;display:flex;flex-wrap:nowrap;gap:6px;padding:5px 9px}
 #nature-reader .nr2-back{flex:0 0 34px;width:34px;height:34px;padding:0;display:flex;align-items:center;justify-content:center;border-radius:11px;font-size:18px}
 #nature-reader .nr2-back-long{display:none}
 #nature-reader .nr2-back-short{display:inline}
 #nature-reader .nr2-top>div:nth-child(2){min-width:0;flex:1}
 #nature-reader .nr2-top strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
 #nature-reader .nr2-top-controls{display:flex;flex-wrap:nowrap;gap:4px;flex:none}
 #nature-reader .nr2-top-controls [data-nr2="panel-vocab"],
 #nature-reader .nr2-top-controls [data-nr2="panel-notes"],
 #nature-reader .nr2-top-controls .nr2-audio-trigger{display:flex!important;align-items:center;justify-content:center;width:32px;height:34px;padding:0;font-size:13px;border-radius:10px;white-space:nowrap}
 #nature-reader .nr2-top-controls [data-nr2="first-toggle"],
 #nature-reader .nr2-top-controls [data-nr2="panel-progress"],
 #nature-reader .nr2-top-controls [data-nr2="side-toggle"]{display:none!important}
 #nature-reader .nr2-short-label,#nature-reader .nr2-audio-trigger span{display:none}
 #nature-reader .nr2-audio-trigger{background:#e7f2eb;border:1px solid #b9d8c4;color:#215a45}
 #nature-reader .nr2-audio-trigger[aria-expanded="true"]{background:#245d4a;color:white}
 #nature-reader .nr2-mobile-toggle{flex:none;height:40px;padding:4px 9px;gap:7px}
 #nature-reader .nr2-mobile-toggle button{padding:6px 8px;min-height:31px;font-size:12px}
 #nature-reader .nr2-layout,#nature-reader .nr2-layout.nr2-pane-compact,#nature-reader .nr2-layout.nr2-pane-wide,#nature-reader .nr2-layout.nr2-pane-hidden{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden;padding:5px 7px}
 #nature-reader .nr2-book,#nature-reader .nr2-reading{flex:1 1 auto;min-height:0;height:100%;max-height:100%;margin:0;padding:7px;border-radius:13px}
 #nature-reader .nr2-book:not(.nr2-mobile-visible),#nature-reader .nr2-reading:not(.nr2-mobile-visible){display:none!important}
 #nature-reader .nr2-book-heading{flex:0 0 auto;font-size:9px;padding:0 3px;line-height:1.25}
 #nature-reader .nr2-paper-wrap{flex:1 1 auto;min-height:0;height:0}
 #nature-reader .nr2-paper{padding:6px;scrollbar-width:thin}
 #nature-reader .nr2-book-nav{flex:0 0 auto;min-height:39px;height:39px;display:flex;flex-wrap:nowrap!important;justify-content:space-between;gap:3px;padding:3px 0}
 #nature-reader .nr2-book-nav button{min-width:27px;padding:5px 6px;height:31px;font-size:12px;border-radius:9px}
 #nature-reader .nr2-book-nav>span{display:block;font-size:10px;font-weight:700;white-space:nowrap}
 #nature-reader .nr2-long{display:none}
 #nature-reader .nr2-mobile-icon{display:inline}
 #nature-reader .nr2-zoom-tools{gap:2px;flex:0 0 auto}
 #nature-reader .nr2-zoom-tools button{min-width:27px;min-height:31px;padding:4px 5px;font-size:13px}
 #nature-reader #nr2-zoom-select{min-width:58px;width:60px;padding:5px 1px;height:31px;font-size:11px}
 #nature-reader .nr2-follow-overlay{left:6px;right:6px;bottom:6px;padding:6px 8px;max-height:25%}
 #nature-reader .nr2-follow-text{font-size:13px;line-height:1.35}
 #nature-reader .nr2-follow-overlay small{display:none}
 #nature-reader .nr2-reading{padding:11px 12px;overflow-y:auto}
 #nature-reader .nr2-player{flex:0 0 auto;height:58px;min-height:58px;display:flex;flex-wrap:nowrap;align-items:center;justify-content:space-between;gap:4px;padding:5px 9px calc(5px + env(safe-area-inset-bottom,0px))}
 #nature-reader .nr2-playbox{flex:0 1 auto;min-width:0;gap:4px;justify-content:flex-start}
 #nature-reader .nr2-playbox button{width:29px;height:29px;font-size:10px}
 #nature-reader .nr2-playbox .nr2-bigplay{width:40px;height:40px;font-size:16px;flex:none}
 #nature-reader .nr2-counter{font-size:10px;white-space:nowrap}
 #nature-reader .nr2-speed{flex:none;padding:2px;border-radius:9px;gap:0}
 #nature-reader .nr2-speed button{padding:7px 7px;font-size:10px;border-radius:7px}
 #nature-reader .nr2-continuous-note{display:none}
 #nature-reader .nr2-feedback{position:absolute!important;height:1px!important;width:1px!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap;padding:0!important;border:0}
 #nature-reader .nr2-audio-settings{display:none;position:absolute;left:9px;right:9px;bottom:calc(65px + env(safe-area-inset-bottom,0px));z-index:25;background:#fff;border:1px solid #bdd9c8;border-radius:17px;padding:13px;box-shadow:0 12px 45px #163b2d35;flex-direction:column;gap:12px;max-height:min(65dvh,410px);overflow:auto}
 #nature-reader .nr2-shell.nr2-audio-open .nr2-audio-settings{display:flex}
 #nature-reader .nr2-audio-settings-head{display:flex;align-items:center;justify-content:space-between;font-size:15px;color:#184c3d}
 #nature-reader .nr2-audio-settings-head button{border:1px solid #d7e5da;border-radius:9px;background:#f7faf7;color:#285743;padding:6px 11px;font-size:13px}
 #nature-reader .nr2-voice-picker{display:flex;max-width:none;width:100%;min-width:0;gap:9px;align-items:center;order:unset}
 #nature-reader .nr2-voice-picker label{font-size:12px}
 #nature-reader .nr2-voice-picker select{max-width:none;width:100%;min-width:0;flex:1;padding:9px 7px;font-size:12px}
 #nature-reader .nr2-player-options{display:grid;grid-template-columns:1fr 1fr;width:100%;gap:8px;align-items:center;justify-items:stretch}
 #nature-reader .nr2-player-options label,#nature-reader .nr2-player-options button{font-size:12px;white-space:normal;min-height:42px;padding:9px;justify-content:center;border:1px solid #deeadf;border-radius:10px;background:#f7fbf8}
 #nature-reader .nr2-player-options input{width:16px;height:16px;accent-color:#245d4a}
 #nature-reader .nr2-player-options .nr2-continuous-label{padding:9px}
 #nature-reader .nr2-side.nr2-floating{bottom:66px;height:min(405px,62dvh)}
}
@media(max-width:365px){
 #nature-reader .nr2-top{padding-inline:6px;gap:4px}
 #nature-reader .nr2-top-controls{gap:3px}
 #nature-reader .nr2-top-controls [data-nr2="panel-vocab"],#nature-reader .nr2-top-controls [data-nr2="panel-notes"],#nature-reader .nr2-top-controls .nr2-audio-trigger{width:29px;height:31px}
 #nature-reader .nr2-book-nav>span{font-size:9px}
 #nature-reader .nr2-zoom-tools button{min-width:25px}
 #nature-reader #nr2-zoom-select{width:56px;min-width:56px}
 #nature-reader .nr2-speed button{padding:6px 5px}
 #nature-reader .nr2-playbox{gap:3px}
 #nature-reader .nr2-counter{font-size:9px}
}