.reader-app{--header-height:72px;--footer-height:68px;--panel-width:382px;min-height:100dvh}.skip-link{z-index:100;background:var(--card);border:2px solid var(--primary);border-radius:8px;padding:12px 18px;position:fixed;top:-100px;left:12px}.skip-link:focus{top:10px}.reader-header,.library-header{height:calc(var(--header-height) + env(safe-area-inset-top));padding:env(safe-area-inset-top) max(28px,env(safe-area-inset-right)) 0 max(28px,env(safe-area-inset-left));border-bottom:1px solid var(--border);background:var(--paper);z-index:25;align-items:center;gap:24px;display:flex;position:sticky;top:0}.reader-header{grid-template-columns:1fr minmax(0,1.5fr) 1fr;display:grid}.back-link{min-height:44px;color:var(--primary);align-items:center;gap:3px;width:fit-content;font-size:14px;display:flex}.reader-title{text-align:center;min-width:0;line-height:1.4}.reader-title 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.wordmark{color:#e4eee8}:root[data-theme=night] .brand-tab{fill:#e3a080}.library-header nav{align-items:stretch;gap:30px;height:100%;margin-left:auto;display:flex}.library-header nav button{color:var(--muted-foreground);border-bottom:2px solid #0000;padding-top:2px;font-size:14px}.library-header nav button[aria-current=page]{border-bottom-color:var(--primary);color:var(--primary);font-weight:600}.reading-main{background:var(--paper);min-height:calc(100dvh - var(--header-height));padding-bottom:calc(var(--footer-height) + env(safe-area-inset-bottom))}.reading-page{max-width:790px;margin:0 auto;padding:36px 62px 80px 78px}.section-heading{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;margin:0 0 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