:root{--reader-bg:#faf9f6;--reader-fg:#1f1a17;--reader-fg-muted:#5e5751;--reader-accent:#8b6f47;--reader-border:#e8e4dd;--reader-font-family:"Literata",Georgia,serif;--reader-font-cjk:"Songti SC","Hiragino Mincho ProN","SimSun","Noto Serif CJK SC","Source Han Serif SC";--reader-font-size:18px;--reader-line-height:1.65;--reader-letter-spacing:0;--reader-paragraph-spacing:1em;--reader-max-width:660px;--reader-text-align:left;--reader-text-indent:0;--reader-word-break:normal;--reader-overflow-wrap:break-word;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--space-12:48px;--space-16:64px;--radius-sm:2px;--radius-md:4px;--radius-lg:8px;--radius-pill:9999px;--shadow-sm:0 1px 2px rgba(0,0,0,0.04);--shadow-md:0 2px 8px rgba(0,0,0,0.06);--motion-fast:120ms;--motion-base:200ms;--motion-slow:400ms;--easing-default:cubic-bezier(0.2,0,0,1)}:root,[data-preset=custom],[data-preset=light]{--reader-bg:#faf9f6;--reader-fg:#1f1a17;--reader-fg-muted:#5e5751;--reader-accent:#8b6f47;--reader-border:#e8e4dd}[data-preset=sepia]{--reader-bg:#f4ecd8;--reader-fg:#3a2e20;--reader-fg-muted:#7a6a55;--reader-accent:#9b6b3e;--reader-border:#e0d4b8}[data-preset=dark]{--reader-bg:#1a1a1a;--reader-fg:#d4d0cc;--reader-fg-muted:#8a867f;--reader-accent:#d4a574;--reader-border:#2e2e2e}*,:after,:before{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--reader-bg);color:var(--reader-fg);font-family:var(--reader-font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--motion-slow) var(--easing-default),color var(--motion-slow) var(--easing-default)}body{min-height:100vh;overflow-x:hidden}button{font-family:inherit;cursor:pointer;background:none;border:none;color:inherit;padding:0}button:focus-visible{outline:2px solid var(--reader-accent);outline-offset:2px;border-radius:var(--radius-sm)}a{color:inherit}