:root{--beta-paper:#fafaf8;--beta-card:#f3f1e9;--beta-ink:#22221e;--beta-muted:#5c5c52;--beta-line:#d5d2c5;--beta-accent:#796847;--beta-focus:#715418;--beta-selection:#e5d9b7;--bw-book-paper:var(--beta-paper);--bw-book-panel:var(--beta-card);--bw-book-ink:var(--beta-ink);--bw-book-muted:var(--beta-muted);--bw-book-rule:var(--beta-line);color-scheme:light}
:root[data-theme="dark"]{--beta-paper:#171714;--beta-card:#22221c;--beta-ink:#f0efe7;--beta-muted:#b8b8ab;--beta-line:#4a4a3f;--beta-accent:#d1bd91;--beta-focus:#e5c985;--beta-selection:#5b5035;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:1.25rem}
body.beta-page{margin:0;background:var(--beta-paper);color:var(--beta-ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%}
.beta-page a{color:inherit;text-underline-offset:.2em;text-decoration-thickness:1px}
.beta-page button{font:inherit}
.beta-page :is(a,button,summary,iframe,[tabindex]):focus-visible{outline:2px solid var(--beta-focus);outline-offset:4px}
.beta-page [hidden]{display:none!important}
.beta-skip{position:absolute;z-index:100;top:8px;left:12px;transform:translateY(-160%);padding:12px 18px;color:var(--beta-ink);background:var(--beta-paper);border:1px solid var(--beta-line)}
.beta-skip:focus{transform:none}
.beta-sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.beta-main{width:min(1024px,calc(100% - 64px));margin:0 auto;padding:34px 0 64px}
.beta-intro{max-width:760px;margin:0 0 28px}
.beta-kicker{display:flex;align-items:center;gap:9px;margin:0 0 12px;color:var(--beta-muted);font-size:12px;letter-spacing:.035em}
.beta-kicker::before{content:"";width:7px;height:7px;border:1px solid currentColor;border-radius:50%;flex:none}
.beta-intro h1{margin:0 0 14px;font-family:Georgia,"Times New Roman",serif;font-size:clamp(35px,4.2vw,52px);font-weight:400;line-height:1.06;letter-spacing:-.027em;text-wrap:balance}
.beta-lead{max-width:720px;margin:0;font-size:17px;line-height:1.55}
.beta-purpose{margin-top:14px}
.beta-page .bw-site-brand img{color-scheme:light}
.beta-guide{scroll-margin-top:20px}
.beta-page .beta-button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:46px;padding:10px 17px;font-size:14px;line-height:1.4;border:1px solid var(--beta-line);border-radius:5px;cursor:pointer;text-decoration:none;transition:background .15s,border-color .15s}
.beta-page .beta-button-primary{background:var(--beta-ink);color:var(--beta-paper);border-color:var(--beta-ink);font-weight:500}
.beta-next{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:20px 0 18px}
.beta-next p{margin:0;color:var(--beta-muted);font-size:13px;line-height:1.45}
.beta-more-examples{padding-top:4px}
.beta-more-examples>summary{display:flex;align-items:center;gap:12px;width:fit-content;min-height:44px;font-size:14px;cursor:pointer;list-style:none}
.beta-more-examples>summary::-webkit-details-marker{display:none}
.beta-more-examples>summary::after{content:"+";font-size:19px;font-weight:400;line-height:1}
.beta-more-examples[open]>summary::after{content:"−"}
.beta-example-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:8px;width:100%}
.beta-page .beta-reading-example{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:84px;padding:15px 16px;text-align:left;border:1px solid var(--beta-line);border-radius:6px;background:var(--beta-paper);color:var(--beta-ink);cursor:pointer}
.beta-example-body{display:grid;gap:5px;min-width:0}
.beta-example-kind{font-size:12px;line-height:1.3;color:var(--beta-muted)}
.beta-example-text{font-family:Georgia,"Times New Roman",serif;font-size:19px;line-height:1.35;overflow-wrap:anywhere}
.beta-example-action{display:inline-flex;align-items:center;gap:5px;flex:none;font-size:12px;line-height:1.4;color:var(--beta-muted)}
.beta-reading-example[aria-pressed="true"]{border-color:var(--beta-accent);background:var(--beta-card)}
.beta-example-status{margin:9px 0 0;color:var(--beta-muted);font-size:12px;line-height:1.4}
.beta-example-status:empty{margin:0}
.beta-reader-wrap{margin-top:24px;min-width:0;scroll-margin-top:18px}
.beta-reader-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.beta-reader-heading h2{margin:0;font-family:Georgia,"Times New Roman",serif;font-size:25px;font-weight:400;line-height:1.3}
.beta-reader-heading>a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:13px;color:var(--beta-muted)}
.beta-reader-frame{display:block;width:100%;height:740px;border:1px solid var(--beta-line);border-radius:8px;background:var(--beta-paper)}
.beta-availability{margin:10px 0 0;color:var(--beta-muted);font-size:13px;line-height:1.45}
.beta-frame-fallback{margin:4px 0 0;font-size:13px;color:var(--beta-muted)}
.beta-frame-fallback a{display:inline-flex;align-items:center;min-height:44px}
.beta-explainer{margin:12px 0 0;border-top:1px solid var(--beta-line)}
.beta-explainer>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:7px 0;font-size:14px;line-height:1.4;cursor:pointer;list-style:none}
.beta-explainer>summary::-webkit-details-marker{display:none}
.beta-explainer>summary::after{content:"+";flex:none;font-size:19px;font-weight:400;line-height:1}
.beta-explainer[open]>summary::after{content:"−"}
.beta-explainer p{margin:5px 0 12px;color:var(--beta-muted);font-size:14px;line-height:1.5}
.beta-feedback{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;margin-top:32px;padding-top:26px;border-top:1px solid var(--beta-line)}
.beta-feedback h2{margin:0 0 7px;font-family:Georgia,"Times New Roman",serif;font-size:23px;line-height:1.3;font-weight:400;letter-spacing:-.015em}
.beta-feedback p{max-width:56ch;margin:8px 0 0;font-size:14px;color:var(--beta-muted)}
.beta-feedback a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.beta-feedback .beta-explainer:first-child{margin-top:0;border-top:0}
.beta-feedback .beta-explainer p{margin:5px 0 12px}
html.bw-book .beta-page .bw-site-header,html.bw-book .beta-page .bw-site-footer{width:min(1120px,calc(100% - 64px));margin-right:auto;margin-left:auto}
html.bw-book .beta-page .bw-site-header{position:relative}
html.bw-book .beta-page .bw-site-footer{margin-top:0}
@media(hover:hover){.beta-reading-example:hover{background:var(--beta-card);border-color:var(--beta-accent)}.beta-page .beta-button-primary:hover{opacity:.86}.beta-explainer>summary:hover,.beta-more-examples>summary:hover{color:var(--beta-accent)}}
@media(max-width:820px){.beta-main{width:calc(100% - 40px);padding-top:24px}html.bw-book .beta-page .bw-site-header,html.bw-book .beta-page .bw-site-footer{width:calc(100% - 40px)}.beta-intro{margin-bottom:22px}.beta-feedback{gap:28px}}
@media(max-width:600px){.beta-main{width:calc(100% - 28px);padding-top:18px;padding-bottom:40px}html.bw-book .beta-page .bw-site-header,html.bw-book .beta-page .bw-site-footer{width:calc(100% - 28px)}html.bw-book .beta-page .bw-site-header{min-height:64px;padding:10px 0}.beta-kicker{margin-bottom:9px;font-size:11px}.beta-intro{margin-bottom:18px}.beta-intro h1{font-size:33px;line-height:1.09;margin-bottom:11px}.beta-lead{font-size:15px;line-height:1.55;max-width:48ch}.beta-purpose{margin-top:12px}.beta-page .beta-button{min-height:44px;font-size:13px;padding:9px 14px}.beta-next{margin:16px 0 7px;gap:8px}.beta-next .beta-button{min-height:48px}.beta-next p{font-size:12px}.beta-example-list{grid-template-columns:minmax(0,1fr)}.beta-page .beta-reading-example{padding:12px;min-height:76px}.beta-example-text{font-size:18px}.beta-feedback{grid-template-columns:minmax(0,1fr);gap:20px;margin-top:25px;padding-top:22px}.beta-reader-heading h2{font-size:23px}}
@media(max-width:350px){.beta-intro h1{font-size:29px}.beta-next .beta-button{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.beta-page *{animation:none!important;transition:none!important}}
@media(forced-colors:active){.beta-reader-frame,.beta-feedback,.beta-explainer{border-color:CanvasText}.beta-page .beta-button,.beta-page .beta-reading-example{color:ButtonText;border-color:ButtonText}.beta-reading-example[aria-pressed="true"]{outline:2px solid Highlight;outline-offset:3px}}