:root{color-scheme:light;--bg:#e8ddc7;--paper:#f1e5c9;--sidebar:#e3d6bb;--ink:#3f382d;--muted:#82755e;--line:#cabb9c;--accent:#934b36;--active:#d7c6a6;--shadow:rgba(77,58,27,.12);--font-size:20px;--leading:1.9;--reader-font:'Songti SC','Noto Serif CJK SC','Source Han Serif SC','SimSun',serif}
:root[data-theme=ivory]{--bg:#eeede8;--paper:#faf9f5;--sidebar:#e9e8e1;--ink:#363830;--muted:#7d7d72;--line:#d2d2c7;--active:#dddfd2;--shadow:#343b2410}
:root[data-theme=sage]{--bg:#d6ded0;--paper:#e2e9d9;--sidebar:#ccd6c5;--ink:#354233;--muted:#6e7c67;--line:#b5c2ac;--accent:#526c45;--active:#bfcdb5;--shadow:#243b2418}
:root[data-theme=night]{color-scheme:dark;--bg:#202421;--paper:#292e29;--sidebar:#232823;--ink:#c9caba;--muted:#949b87;--line:#454e40;--accent:#d3a579;--active:#394335;--shadow:#0003}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;font-size:14px;transition:background .25s,color .25s}button,input,select{font:inherit}button{cursor:pointer;color:inherit}button:disabled{opacity:.32;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button{touch-action:manipulation}button,input,select{-webkit-tap-highlight-color:transparent}button{background:none;border:0}button:hover:not(:disabled){color:var(--accent)}input,select{color:var(--ink)}[hidden]{display:none!important}.topbar{height:80px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:var(--bg);position:relative;z-index:4}.brand{display:flex;align-items:center;gap:14px;font:600 23px var(--reader-font);letter-spacing:3px;padding:0}.seal{background:#944c37;color:#f5dfb3;border-radius:3px;width:36px;height:40px;display:grid;place-items:center;font-size:26px;box-shadow:inset 0 0 0 3px #944c37,inset 0 0 0 4px #f5dfb366}.brand-note{font:11px sans-serif;letter-spacing:3px;color:var(--muted);margin-left:6px;border-left:1px solid var(--line);padding-left:20px}.top-actions{display:flex;align-items:center;gap:30px}.serial{font-size:12px;color:var(--muted);display:flex;gap:8px;align-items:center}.serial i,.live-dot{width:5px;height:5px;border-radius:50%;background:#7f8a60;display:inline-block}.text-button{font-size:12px;display:flex;gap:14px;align-items:center}.text-button span{font:20px Georgia,serif}.workspace{max-width:1680px;margin:auto;display:grid;grid-template-columns:280px minmax(0,1fr) 80px;min-height:calc(100vh - 80px)}.sidebar{background:linear-gradient(135deg,transparent,var(--shadow)),var(--sidebar);border-right:1px solid var(--line);height:calc(100dvh - 80px);position:sticky;top:0;display:flex;flex-direction:column;min-height:450px}.book-heading{padding:37px 28px 29px}.eyebrow{font-family:Georgia,serif;font-size:9px;letter-spacing:2.2px;color:var(--muted)}.book-heading h1{font:normal 36px var(--reader-font);letter-spacing:5px;margin:15px 0 10px}.book-heading p{font:13px var(--reader-font);color:var(--muted);letter-spacing:2px}.book-stats{display:flex;gap:10px;font-size:11px;color:var(--muted);margin-top:23px}.dot{opacity:.6}.catalog-heading{display:flex;align-items:center;padding:0 25px;gap:10px}.catalog-heading h2{font:600 14px var(--reader-font);margin-right:auto}.quiet-button{font-size:11px;color:var(--muted);padding:8px 3px}.search-box{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);margin:7px 25px 17px;padding:8px 0;color:var(--muted)}.search-box>span{font-size:23px;line-height:20px}.search-box input{min-width:0;width:100%;border:0;background:transparent;font-size:11px;outline:0}.search-box input::placeholder{color:var(--muted)}kbd{font:10px monospace;border:1px solid var(--line);padding:0 4px;border-radius:3px}.catalog{overflow:auto;flex:1;scrollbar-width:thin;scrollbar-color:var(--line) transparent;padding:0 15px 25px}.volume-group h3{position:sticky;top:0;background:var(--sidebar);padding:14px 12px;font-size:11px;font-weight:500;letter-spacing:1px;margin:0 0 5px;color:var(--muted);z-index:1}.chapter-link{width:100%;display:flex;text-align:left;align-items:center;gap:14px;padding:12px;border:1px solid transparent;border-radius:3px;margin-bottom:3px;font-size:12px;min-height:42px}.chapter-link .chapter-order{font:12px/1.4 -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;font-variant-numeric:lining-nums tabular-nums;letter-spacing:0;flex-shrink:0;color:var(--muted);min-width:25px}.chapter-link .chapter-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chapter-link[aria-current=true]{background:var(--active);border-color:var(--line);color:var(--accent)}.chapter-link[aria-current=true]:after{content:'读';font:10px var(--reader-font);margin-left:auto}.chapter-link:hover{background:var(--active)}.empty-catalog{color:var(--muted);line-height:1.8;padding:20px 12px}.sidebar-foot{border-top:1px solid var(--line);font-size:10px;color:var(--muted);display:flex;align-items:center;gap:7px;padding:13px 23px}.sidebar-foot button{margin-left:auto;font-size:10px;white-space:nowrap}.main{min-width:0;padding:28px 48px 16px;max-width:1050px;width:100%;margin:0 auto}.reader-topline{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:0 2px 17px;letter-spacing:1px}.save-status{font-size:10px;letter-spacing:0}.paper{position:relative;background:radial-gradient(ellipse at 0 30%,var(--shadow),transparent 30%),linear-gradient(90deg,transparent 98%,var(--shadow)),var(--paper);box-shadow:0 6px 20px var(--shadow),0 0 0 1px var(--line);border-radius:2px;padding:24px 52px 0;min-width:0;isolation:isolate}.paper:before{content:'';position:absolute;inset:4px -4px -4px 4px;background:var(--paper);border:1px solid var(--line);z-index:-2;box-shadow:3px 3px 0 -1px var(--bg),4px 4px 0 -1px var(--line)}.paper-top{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:14px;color:var(--muted);font:10px var(--reader-font);letter-spacing:3px}.chapter-heading{text-align:center;padding:25px 0 16px}.chapter-kicker{font-size:10px;letter-spacing:4px;color:var(--accent);margin:2px 0 12px}.chapter-heading h2{font:500 30px var(--reader-font);line-height:1.5;letter-spacing:4px;margin:0;outline:none}.chapter-meta{color:var(--muted);font-size:10px;letter-spacing:1px;margin:13px 0 0}.ornament{display:flex;justify-content:center;align-items:center;gap:14px;color:var(--accent);font-size:11px;margin-top:21px}.ornament span{width:38px;height:1px;background:var(--line)}.reading-viewport{overflow:hidden;position:relative;height:clamp(280px,calc(100dvh - 474px),680px);touch-action:pan-y}.prose{font-family:var(--reader-font);font-size:var(--font-size);line-height:var(--leading);font-weight:400;letter-spacing:.06em;text-align:justify;overflow-wrap:anywhere;column-width:var(--column-width,600px);column-gap:56px;column-fill:auto;height:100%;margin:0;will-change:transform;transform:translateX(var(--page-offset,0px))}.prose p{margin:0 0 .85em;text-indent:2em;orphans:2;widows:2}.prose>p:first-child{margin-top:0}.prose h1,.prose h2,.prose h3,.prose h4{font-size:1.15em;line-height:1.7;text-align:center;break-after:avoid;margin:1em 0;font-weight:600;letter-spacing:.15em}.prose hr{border:0;text-align:center;margin:1.2em 0;line-height:1em;color:var(--muted)}.prose hr:after{content:'·  ·  ·';letter-spacing:.3em}.prose blockquote{margin:1em 0;padding:0 1em;border-left:2px solid var(--line);color:var(--muted)}.prose blockquote p{text-indent:0}.prose pre{white-space:pre-wrap;font-size:.8em}.prose table{width:100%;border-collapse:collapse;font-size:.8em}.prose th,.prose td{border:1px solid var(--line);padding:6px}.prose a{color:var(--accent)}.paper-footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:21px;padding:13px 0 17px;color:var(--muted);font-size:10px}.footer-quote{letter-spacing:2px;font-family:var(--reader-font)}.page-jump{display:flex;align-items:center;gap:4px;font:11px Georgia,serif;white-space:nowrap}.page-jump input{width:37px;text-align:center;padding:3px 0;background:transparent;border:0;border-bottom:1px solid var(--line);appearance:textfield;font-size:12px;color:var(--accent)}.page-jump input::-webkit-inner-spin-button{appearance:none}.navigation{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:25px}.nav-button{background:var(--paper);border:1px solid var(--line);border-radius:3px;min-height:42px;padding:10px 19px;display:flex;align-items:center;gap:23px;font-size:11px;letter-spacing:1px}.nav-button:hover:not(:disabled){border-color:var(--accent);box-shadow:0 2px 5px var(--shadow)}.reading-progress{text-align:center;flex:1;max-width:190px;color:var(--muted);font-size:10px}.progress-track{height:2px;background:var(--line);margin:7px 0 8px;overflow:hidden}.progress-track>div{height:100%;background:var(--accent);width:0;transition:width .2s}.keyboard-hint{font-size:9px;letter-spacing:1px}.keyboard-hint span{padding:0 5px}.chapter-navigation{display:flex;justify-content:center;gap:40px;margin-top:13px}.site-foot{text-align:center;color:var(--muted);font:10px var(--reader-font);letter-spacing:3px;margin:15px 0}.tool-rail{padding-top:80px;display:flex;flex-direction:column;align-items:flex-start;gap:10px}.tool-rail button{width:42px;height:42px;display:grid;place-items:center;background:var(--paper);border:1px solid var(--line);border-radius:3px;color:var(--muted);font:20px Georgia,serif}.tool-rail button[aria-pressed=true]{color:var(--accent);border-color:var(--accent)}.mobile-menu{display:none}.icon-button{width:38px;height:38px;display:grid;place-items:center;font-size:18px}.skip-link{position:fixed;top:-70px;left:20px;z-index:100;background:var(--paper);padding:15px;color:var(--ink)}.skip-link:focus{top:10px}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--line);box-shadow:0 20px 80px #0003;border-radius:8px;width:min(440px,calc(100vw - 32px));max-height:calc(100dvh - 36px);padding:28px;overflow:auto}dialog::backdrop{background:#28221866;backdrop-filter:blur(4px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.dialog-heading h2{font:26px var(--reader-font);margin:10px 0 0;letter-spacing:2px}.setting{border:0;padding:0;margin:22px 0;min-width:0}.setting label,.setting legend{display:block;font-size:12px;margin-bottom:12px}.setting output{float:right;color:var(--accent);font-family:Georgia,serif}.range-row{display:flex;align-items:center;gap:16px;color:var(--muted);font-size:12px}input[type=range]{width:100%;accent-color:var(--accent)}input[type=checkbox]{accent-color:var(--accent);width:18px;height:18px}.themes{display:flex;gap:12px}.theme-swatch{flex:1;height:56px;border:1px solid #8885;border-radius:4px;font:13px var(--reader-font);position:relative}.theme-swatch[aria-pressed=true]{outline:2px solid var(--accent);outline-offset:3px}.parchment{background:#e9d8b1;color:#604a2d}.ivory{background:#faf9f5;color:#363830}.sage{background:#dce5d3;color:#354233}.night{background:#292e29;color:#c9caba}select{width:100%;padding:10px 12px;border:1px solid var(--line);background:transparent;border-radius:4px;font-size:12px}.inline-setting{display:flex;justify-content:space-between;align-items:center}.inline-setting label{margin:0}.reset-button{width:100%;border:1px solid var(--line);border-radius:4px;padding:12px;font-size:12px}.settings-note{font-size:10px;text-align:center;color:var(--muted);margin:18px 0 0}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:12px 22px;border-radius:5px;box-shadow:0 5px 25px #0002;z-index:20;font-size:12px;max-width:90vw;text-align:center}.error-banner{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);z-index:21;padding:12px 20px;background:var(--paper);border:1px solid var(--accent);border-radius:4px;max-width:95vw}.error-banner button{color:var(--accent);text-decoration:underline;margin-left:12px}body.focus .sidebar,body.focus .brand-note,body.focus .serial{display:none}body.focus .workspace{grid-template-columns:minmax(0,1fr) 65px;max-width:1150px}body.focus .main{max-width:1000px}body.scroll-mode .reading-viewport{height:auto;overflow:visible}body.scroll-mode .prose{columns:auto;height:auto;transform:none;will-change:auto}body.scroll-mode .page-jump{display:none}body.scroll-mode .paper{padding-bottom:0}body.scroll-mode .tool-rail{position:sticky;top:0;align-self:start}body.scroll-mode .keyboard-hint{display:none}
@media(min-width:1500px){.main{padding-left:65px;padding-right:65px}.paper{padding-left:68px;padding-right:68px}.workspace{grid-template-columns:300px minmax(0,1fr) 90px}}
@media(max-width:1150px){.workspace{grid-template-columns:245px minmax(0,1fr) 58px}.main{padding:26px 28px 16px}.paper{padding-left:32px;padding-right:32px}.book-heading{padding-left:25px}.book-heading h1{font-size:31px}.brand-note{display:none}.nav-button{gap:12px;padding:10px 14px}}
@media(max-width:850px){.topbar{height:65px;padding:0 22px}.workspace{grid-template-columns:minmax(0,1fr) 54px;min-height:calc(100vh - 65px);max-width:800px}.sidebar{display:none;position:fixed;top:65px;bottom:0;left:0;width:290px;height:calc(100dvh - 65px);z-index:12;min-height:0}.sidebar.open{display:flex!important}.drawer-scrim{position:fixed;inset:65px 0 0;background:#25201466;z-index:11;width:100%;height:100%;border:0;backdrop-filter:blur(2px)}.mobile-menu{display:block}.top-actions{gap:16px}.serial{display:none}.main{padding:24px 25px 16px}.paper{padding-left:35px;padding-right:35px}.reading-viewport{height:clamp(280px,calc(100dvh - 440px),700px)}.tool-rail{padding-top:72px}.catalog-heading .mobile-menu{font-size:14px}.book-heading{padding-top:25px}body.focus .workspace{grid-template-columns:minmax(0,1fr) 54px}.chapter-heading{padding-top:22px}}
@media(max-width:540px){.topbar{padding:0 17px;height:61px}.brand{font-size:19px;gap:10px;letter-spacing:2px}.seal{width:30px;height:34px;font-size:23px}.top-actions{gap:9px}.text-button{font-size:0;gap:0}.text-button span{font-size:21px}.workspace,body.focus .workspace{display:block}.main{padding:18px 15px 12px}.tool-rail{display:none}.reader-topline{font-size:10px;margin:0 3px 14px;letter-spacing:0}.paper{padding:18px 23px 0}.paper-top{font-size:9px;padding-bottom:11px}.chapter-heading{padding:20px 0 18px}.chapter-heading h2{font-size:26px;letter-spacing:2px}.chapter-kicker{font-size:9px;margin-bottom:8px}.chapter-meta{font-size:9px;margin-top:9px}.ornament{margin-top:15px}.reading-viewport{height:clamp(240px,calc(100dvh - 420px),650px)}.prose{letter-spacing:.025em}.paper-footer{margin-top:16px;padding:12px 0}.footer-quote{font-size:9px;letter-spacing:1px}.navigation{gap:12px;margin-top:20px}.nav-button{min-height:42px;font-size:11px;padding:10px 12px;gap:8px}.reading-progress{max-width:120px}.keyboard-hint{display:none}.chapter-navigation{gap:32px;margin-top:13px}.site-foot{margin-top:10px}.sidebar{top:61px;height:calc(100dvh - 61px)}.drawer-scrim{top:61px}.toast{bottom:20px}.save-status{font-size:9px}.settings-note{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

@media(max-width:540px){.tool-rail{display:flex;flex-direction:row;justify-content:center;padding:0 15px 14px;gap:18px}.tool-rail button{width:36px;height:34px;font-size:17px}.tool-rail button:first-child{display:none}}

/* Keep mobile browser chrome, notches and touch interactions out of the reading area. */
html{min-width:280px;-webkit-text-size-adjust:100%;text-size-adjust:100%;overscroll-behavior-x:none}
.paper{touch-action:pan-y pinch-zoom}.reading-viewport{touch-action:inherit}
.paper.swiping{user-select:none;-webkit-user-select:none}
body.scroll-mode .paper{touch-action:auto}
body.catalog-open{overflow:hidden}
.catalog{overscroll-behavior:contain;min-height:0}
.swipe-hint{display:none}
.topbar{padding-left:max(22px,env(safe-area-inset-left));padding-right:max(22px,env(safe-area-inset-right))}
@media(max-width:850px){
  .sidebar{width:min(310px,calc(100vw - 24px));padding-bottom:env(safe-area-inset-bottom)}
  .drawer-scrim{height:auto;bottom:0}
  .search-box input{font-size:16px}
  .sidebar .quiet-button,.chapter-link{min-height:44px}
  .sidebar-foot{flex-shrink:0}
  .swipe-hint{display:block;font-size:9px;white-space:nowrap;letter-spacing:0}
  .keyboard-hint{display:none}
  .chapter-navigation .quiet-button{min-height:44px}
  .page-jump input{font-size:16px;min-height:32px;width:42px}
  .text-button{min-width:44px;min-height:44px;justify-content:center}
  .main{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
  dialog input:not([type=range]):not([type=checkbox]),dialog select{font-size:16px}
  dialog{padding:22px;max-height:calc(100dvh - 24px - env(safe-area-inset-bottom))}
}
@media(max-width:540px){
  .chapter-heading{padding:15px 0 13px}.chapter-heading h2{font-size:25px}
  .chapter-meta{margin-top:6px}.ornament{margin-top:10px}
  .navigation{gap:8px;margin-top:16px}.nav-button{min-height:44px;min-width:88px;justify-content:center}
  .paper{padding-left:20px;padding-right:20px}
  .paper-footer{margin-top:12px;padding:8px 0}
  .chapter-navigation{margin-top:4px;gap:26px}
  .site-foot{display:none}
  .tool-rail{padding-bottom:max(12px,env(safe-area-inset-bottom));gap:28px}
  .tool-rail button{width:44px;height:44px}
}
@media(max-width:360px){
  .main{padding:12px 12px 8px}.paper{padding-left:16px;padding-right:16px}
  .reading-progress{font-size:9px}.swipe-hint{font-size:8px}
  .nav-button{padding:8px;min-width:78px;gap:5px}
  .footer-quote{font-size:8px;letter-spacing:0}
  .chapter-heading h2{font-size:23px}.topbar{padding:0 12px}
}
@media(max-height:700px) and (max-width:850px){
  .topbar{height:52px}.sidebar{top:52px;height:calc(100dvh - 52px)}.drawer-scrim{top:52px}
  .main{padding-top:10px}.reader-topline{margin-bottom:8px}
  .paper{padding-top:10px}.paper-top{display:none}
  .chapter-heading{padding:4px 0 10px;display:flex;align-items:center;justify-content:center;gap:14px}
  .chapter-kicker{margin:0;font-size:10px;letter-spacing:1px}.chapter-heading h2{font-size:22px;letter-spacing:2px}
  .chapter-meta,.ornament{display:none}
  .paper-footer{margin-top:9px;padding:4px 0}.navigation{margin-top:12px}
  .chapter-navigation{margin-top:0}.site-foot{display:none}
  .book-heading{padding:14px 24px 10px}.book-heading h1{font-size:25px;margin:8px 0}
  .book-heading p,.book-stats,.eyebrow{display:none}
  .search-box{margin-bottom:8px}
}
@media(max-height:500px) and (min-width:541px) and (max-width:950px){
  .main{padding-top:8px;padding-bottom:4px}.reader-topline{display:none}
  .chapter-navigation{display:none}.tool-rail{padding-top:30px}
  .swipe-hint{display:none}.navigation{margin-top:8px}
}
@media(hover:none){.chapter-link:hover{background:transparent}.chapter-link[aria-current=true]{background:var(--active)}}
.topbar .mobile-menu{display:none}
@media(max-width:850px){.topbar .mobile-menu{display:grid}}

/* Desktop reading gives the page to the story, with a compact running heading. */
@media(min-width:851px){
  body:not(.scroll-mode) .topbar{height:60px}
  body:not(.scroll-mode) .workspace{min-height:calc(100dvh - 60px)}
  body:not(.scroll-mode) .sidebar{height:calc(100dvh - 60px)}
  body:not(.scroll-mode) .main{padding-top:14px;padding-bottom:8px}
  body:not(.scroll-mode) .reader-topline{margin-bottom:10px}
  body:not(.scroll-mode) .paper{padding-top:16px}
  body:not(.scroll-mode) .paper-top{display:none}
  body:not(.scroll-mode) .chapter-heading{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 16px;text-align:left;padding:0 0 12px;margin-bottom:14px;border-bottom:1px solid var(--line)}
  body:not(.scroll-mode) .chapter-kicker{margin:0;letter-spacing:2px;flex-shrink:0}
  body:not(.scroll-mode) .chapter-heading h2{font-size:24px;line-height:1.4;letter-spacing:2px}
  body:not(.scroll-mode) .chapter-meta{margin:0 0 0 auto;white-space:nowrap;letter-spacing:0}
  body:not(.scroll-mode) .ornament{display:none}
  body:not(.scroll-mode) .prose p{margin-bottom:.45em}
  body:not(.scroll-mode) .paper-footer{margin-top:12px;padding:7px 0 9px}
  body:not(.scroll-mode) .navigation{margin-top:14px}
  body:not(.scroll-mode) .chapter-navigation{margin-top:3px}
  body:not(.scroll-mode) .site-foot{display:none}
  body:not(.scroll-mode) .tool-rail{padding-top:55px}
}

/* Keep secondary phone tools in the settings sheet, not below the story. */
.mobile-reading-tools{display:none}
@media(max-width:540px){
  .tool-rail{display:none}
  .mobile-reading-tools{display:flex;gap:8px;margin:0 0 20px}
  .mobile-reading-tools button{flex:1;min-height:44px;border:1px solid var(--line);border-radius:4px;font-size:12px;padding:6px 3px}
  .mobile-reading-tools button[aria-pressed=true]{border-color:var(--accent);color:var(--accent)}
  .main{padding-bottom:max(8px,env(safe-area-inset-bottom))}
  .paper-footer{margin-top:8px;padding:2px 0 4px;justify-content:flex-end}
  .footer-quote{display:none}
  .navigation{margin-top:9px}
  .swipe-hint{display:none}
  .chapter-navigation{margin-top:0}
  body.focus .reader-topline,body.focus .paper-top,body.focus .chapter-meta,body.focus .ornament{display:none}
  body.focus .chapter-heading{display:flex;align-items:center;justify-content:center;gap:12px;padding:6px 0 14px}
  body.focus .chapter-kicker{margin:0}
}

/* Phone catalog is a dedicated full-screen reading view. */
.mobile-catalog-meta,.mobile-current-button{display:none}
.catalog-title{margin-right:auto;min-width:0}
@media(max-width:850px){
  .sidebar{inset:0;width:100%;max-width:none;height:100dvh;min-height:0;z-index:20;border:0;background:var(--paper);padding:env(safe-area-inset-top) max(0px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(0px,env(safe-area-inset-left))}
  .sidebar .book-heading{display:none}
  .catalog-heading{flex-shrink:0;min-height:60px;padding:8px 16px;gap:8px}
  .catalog-heading h2{font:600 20px var(--reader-font);line-height:24px;margin:0;letter-spacing:1px;white-space:nowrap}
  .catalog-heading #reverse-button{font-size:12px;min-height:44px;padding:8px}
  .catalog-heading #close-menu{font-size:12px;min-height:44px;padding:8px 10px;color:var(--accent);white-space:nowrap}
  .mobile-catalog-meta{display:block;margin:2px 0 0;color:var(--muted);font-size:10px;line-height:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .search-box{flex-shrink:0;margin:0 16px 8px;padding:8px 10px;min-height:44px;border:1px solid var(--line);background:var(--bg);border-radius:5px}
  .search-box input{font-size:16px}.search-box kbd{display:none}
  .catalog{padding:0 16px 8px;scroll-padding-top:32px;scrollbar-width:thin}
  .volume-group h3{background:var(--bg);margin:0;padding:7px 10px;font-size:11px;line-height:18px;border-bottom:1px solid var(--line)}
  .chapter-link{min-height:44px;padding:9px 10px;margin:0;border:0;border-bottom:1px solid color-mix(in srgb,var(--line) 50%,transparent);border-radius:0;gap:10px;font-size:14px;line-height:24px}
  .chapter-link .chapter-order{font-size:12px;min-width:28px}
  .chapter-link .chapter-name{white-space:normal;overflow-wrap:anywhere;flex:1}
  .chapter-link[aria-current=true]{border-left:3px solid var(--accent);padding-left:7px;border-radius:3px;background:var(--active)}
  .chapter-link[aria-current=true]:after{content:'正在读';font-size:10px;white-space:nowrap}
  .sidebar-foot{flex-shrink:0;min-height:48px;padding:2px 16px;border-top:1px solid var(--line);background:var(--bg);justify-content:space-between}
  .sidebar-foot>span{display:none}
  .sidebar-foot .quiet-button{margin:0;font-size:12px;min-height:44px;padding:8px 12px}
  .mobile-current-button{display:block}
}
@media(max-width:360px){.catalog-heading{padding-left:16px;padding-right:12px;gap:4px}.catalog-heading h2{font-size:20px}.search-box{margin-left:16px;margin-right:16px}}
@media(min-width:360px) and (max-width:850px){
  .volume-group{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:8px}
  .volume-group h3{grid-column:1/-1}
  .chapter-link{gap:6px;padding-left:8px;padding-right:8px;align-self:stretch}
  .chapter-link .chapter-order{min-width:24px;font-size:12px}
  .chapter-link[aria-current=true]{padding-left:5px}
  .chapter-link[aria-current=true]:after{content:'读';font-size:10px}
}
@media(min-width:600px) and (max-width:850px){.volume-group{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-height:500px) and (max-width:850px){.catalog-heading{min-height:48px;padding-top:2px}.mobile-catalog-meta{display:none}.search-box{margin-bottom:6px}.sidebar-foot{min-height:44px;padding-top:0;padding-bottom:0}}

/* A single reading toolbar keeps pagination and progress together. */
.paper,body.scroll-mode .paper{padding-bottom:12px}
.reading-position{display:flex;align-items:center;justify-content:center;gap:10px}
.reading-progress{max-width:230px}
.reading-position #progress-label{white-space:nowrap}
.mobile-chapter-button{display:none}
@media(max-width:850px){
  .chapter-navigation,.site-foot{display:none}
  .paper-top,.chapter-meta,.ornament{display:none}
  .chapter-heading,body.focus .chapter-heading{display:flex;align-items:baseline;justify-content:center;flex-wrap:wrap;gap:2px 10px;padding:2px 0 9px;margin:0 0 10px;border-bottom:1px solid var(--line)}
  .chapter-kicker{font:400 14px/1.5 var(--reader-font);margin:0;letter-spacing:1px;color:var(--muted);flex-shrink:0}
  .chapter-heading h2{font:500 22px/1.5 var(--reader-font);letter-spacing:1px;min-width:0;overflow-wrap:anywhere}
  .navigation,body:not(.scroll-mode) .navigation{margin-top:8px;gap:8px;min-height:48px}
  .navigation .nav-button{min-height:44px;padding:8px 10px;min-width:88px;gap:6px;white-space:nowrap}
  .reading-progress{max-width:140px;min-width:0}
  .reading-position{gap:0;min-height:44px}
  .page-jump{justify-content:center;font-size:11px;gap:3px}
  .page-jump input{width:44px;min-height:44px;padding:0;border:0;font-size:16px}
  body:not(.scroll-mode) .reading-position #progress-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
  .progress-track{margin:0;height:2px}
  .swipe-hint,.keyboard-hint{display:none}
  .main{padding-bottom:max(8px,env(safe-area-inset-bottom))}
  .sidebar-foot{gap:0;padding-left:12px;padding-right:12px}
  .sidebar-foot .quiet-button{padding:8px;font-size:12px}
  .mobile-chapter-button{display:block}
}
@media(max-width:360px){
  .navigation .nav-button{min-width:78px;padding:8px 6px;gap:4px}
  .page-jump{font-size:10px;gap:0}
  .page-jump input{width:40px}
  .sidebar-foot{padding-left:8px;padding-right:8px}
  .sidebar-foot .quiet-button{padding:8px 6px}
}

/* Read history stays distinct from the highlighted current chapter. */
.chapter-link[aria-current=true]::after{content:none}
.chapter-status{margin-left:auto;flex-shrink:0;font:10px/1.4 -apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;color:var(--accent);white-space:nowrap}
.chapter-status:empty{display:none}
.chapter-link.is-read:not([aria-current=true]) .chapter-name{color:var(--muted)}
.chapter-link.is-read .chapter-status{color:var(--muted)}
.chapter-link[aria-current=true] .chapter-status{color:var(--accent)}