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@media(max-width:1100px){.workspace{grid-template-columns:minmax(0,1fr) 320px}.sidebar{display:none;position:fixed;left:0;top:0;bottom:0;width:280px;z-index:60;box-shadow:var(--shadow)}.sidebar-open .sidebar{display:flex}.sidebar-open .sidebar-scrim{display:block;position:fixed;inset:0;background:#0c1c1a88;z-index:59}.sidebar-close,.menu-toggle{display:inline-flex!important}.brand-zone{min-width:200px}.header-end{min-width:160px}.sidebar{padding:25px 22px 0}.sidebar-footer{margin:0 -22px;padding:20px 22px}.book-info img{width:72px;height:108px}.book-info h2{font-size:18px}.reading-toolbar{padding:0 28px}.breadcrumb>span{display:inline}.chapter-heading{padding:35px 38px 30px}.sentence-list{padding:0 20px}.sentence{padding:17px 25px 17px 8px}.reading-dock{padding:17px 25px}.local-status{font-size:11px}.topnav{gap:20px}.primary-btn{padding:0 16px}}
@media(max-width:899px){.workspace{display:block}.reading-area{height:100%}.analysis-panel{display:none;position:fixed;right:0;top:0;bottom:0;width:min(380px,92vw);z-index:70;box-shadow:var(--shadow)}.notes-open .analysis-panel{display:flex}.notes-open .notes-scrim{display:block;position:fixed;inset:0;background:#0c1c1a99;z-index:69}.close-notes,.mobile-analysis,.mobile-note-link{display:inline-flex!important}.local-status{display:none}.brand-zone,.header-end{min-width:0}.header-end{margin-left:20px}.topbar{height:66px}.workspace{height:calc(100dvh - 66px)}.topnav{margin-left:auto;gap:25px}.brand-zone{margin-right:35px}.reading-toolbar{height:58px;padding:0 36px}.chapter-heading{padding:33px 50px 25px}.sentence-list{padding:0 28px}.reading-dock{padding:13px 32px 15px;min-height:77px}.primary-btn{font-size:14px;height:42px}.dock-progress{width:100px}.dock-actions{gap:10px}.analysis-title{height:66px}.analysis-content{padding:24px}.note-detail{font-size:14px}.note-meaning{font-size:15px}.example-zh{font-size:13px}.note-label>span,.example>span{font-size:12px}.annotation-footnote{font-size:12px}.note-card h3{font-size:25px}.example>p:not(.example-zh){font-size:17px}.analysis-intro>span{font-size:12px}.analysis-intro p{font-size:14px}.analysis-footer{font-size:12px}.book-info h2{font-size:18px}}
@media(max-width:540px){.topbar{padding:0 16px;height:62px}.workspace{height:calc(100dvh - 62px)}.brand-zone{gap:8px;margin-right:auto}.brand{gap:8px}.brand-mark{width:29px;height:31px;font-size:21px;border-radius:7px 7px 3px 7px}.brand strong{font-size:20px;letter-spacing:2px}.menu-toggle{width:26px}.topnav{gap:18px;margin-left:18px}.topnav>button{font-size:13px;gap:5px}.topnav svg{display:none}.saved-count{font-size:10px;min-width:15px}.header-end{margin-left:12px}.header-end .icon-btn{width:28px}.reading-toolbar{height:56px;padding:0 20px;gap:10px}.breadcrumb{font-size:12px}.breadcrumb>span,.breadcrumb>svg{display:none}.reader-tools{gap:15px}.segmented button{padding:2px 8px;font-size:12px}.translation-toggle{font-size:12px}.chapter-heading{padding:29px 27px 24px}.chapter-kicker{font-size:10px;gap:13px}.chapter-meta{font-size:11px;gap:8px;flex-wrap:wrap}h1{font-size:37px;margin-top:15px;margin-bottom:9px}.book-title-en{font-size:14px}.sentence-list{padding:0 12px}.sentence{padding:15px 16px 15px 3px;gap:6px;border-radius:7px}.sentence-margin{width:22px}.sentence-index{min-width:22px;font-size:9px}.english{font-size:calc(var(--reader-size) - 1px);line-height:1.8;letter-spacing:0}.translation{gap:9px;padding-top:14px;margin-top:15px}.translation p{font-size:15px;line-height:1.85}.translation>span{font-size:10px;padding:2px 4px}.sentence-actions{gap:15px;flex-wrap:wrap;margin-top:11px}.sentence-actions button{font-size:12px;min-height:33px;gap:5px}.read-label{display:none}.sentence.current:before{top:21px;bottom:21px}.reading-dock{padding:12px 16px max(13px,env(safe-area-inset-bottom));min-height:76px;gap:10px}.dock-progress{width:63px}.dock-progress strong{font-size:13px}.dock-actions{gap:4px}.dock-actions .icon-btn{width:32px}.primary-btn{font-size:12px;padding:0 11px;gap:8px;height:40px}.primary-btn svg{width:17px;height:17px}.page-pagination{margin:23px 25px 35px}.focus-mode .english{font-size:calc(var(--reader-size) + 2px)}.focus-mode .sentence{padding-top:25px;padding-bottom:23px}.notice{margin:0 22px 22px;padding:13px;font-size:13px}.notebook-dialog{padding:23px}.setting-row{font-size:14px}.toast{font-size:12px;bottom:95px;width:max-content}.dialog-heading h2{font-size:22px}.note-card{padding:18px}.analysis-content{padding:20px}.sidebar-footer strong{font-size:14px}.sidebar-footer span{font-size:12px}.chapter-button{min-height:44px}.chapter-button small{font-size:12px}.part-label{font-size:11px}.contents-head>span{font-size:12px}.book-info p:not(.series){font-size:13px}.source-badge{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(max-height:650px){.chapter-heading{padding-top:24px;padding-bottom:20px}.chapter-heading h1{font-size:32px}.reading-toolbar{height:52px}.analysis-title{height:52px}.sidebar-top{margin-bottom:15px}.sidebar-rule{margin:19px 0}.reading-dock{min-height:72px}}

/* Keep the learning text comfortable at ordinary laptop widths. */
.note-detail{font-size:14px}.note-meaning{font-size:15px}.example-zh{font-size:13px}.example>p:not(.example-zh){font-size:17px}.note-label>span,.example>span{font-size:12px}.analysis-intro>span,.annotation-footnote{font-size:12px}.analysis-intro p{font-size:14px}.analysis-footer{font-size:12px}.topnav>button,.contents-head h3,.chapter-button{font-size:14px}.segmented button,.translation-toggle,.breadcrumb{font-size:13px}.source-badge,.sidebar-footer span,.book-info p:not(.series){font-size:12px}.sidebar-footer strong{font-size:13px}.sentence-actions button{font-size:12px}.chapter-kicker,.ready-tag{font-size:11px}.local-status{font-size:12px}

/* Mobile reading: quiet chapter context and a clear upper reading focus. */
@media(max-width:899px){
 .topbar{height:52px}.workspace{height:calc(100dvh - 52px)}
 .brand strong{font-size:18px}.brand-mark{width:25px;height:27px;font-size:18px}
 .reading-toolbar{height:48px}.chapter-heading{padding:16px 28px 14px}
 .chapter-heading h1{font-size:22px;line-height:1.4;letter-spacing:0;margin:0 0 7px;color:var(--muted)}
 .chapter-kicker,.book-title-en{display:none}
 .chapter-meta{margin-top:0;font-size:12px;gap:8px}
 .chapter-meta>span:first-child,.chapter-meta>i:first-of-type{display:none}
 /* Room for the final card to sit above the viewport midpoint. */
 .reading-scroll::after{content:"";display:block;height:55%;min-height:140px;pointer-events:none}
}

/* Focus mode replaces the sentence in a stable slot without scroll anchoring. */
.focus-reading .reading-scroll{overflow-anchor:none;scroll-behavior:auto}

@media(max-width:899px){
 .focus-reading .chapter-heading{display:none}
 .focus-reading .focus-mode{margin-top:0;padding-top:24px}
 .focus-reading .reading-scroll::after{display:none}
}
.focus-reading .sentence-detail{animation:focus-expand 220ms cubic-bezier(.22,1,.36,1)}
@keyframes focus-expand{from{grid-template-rows:0fr;opacity:0}to{grid-template-rows:1fr;opacity:1}}