.bkn{position:sticky;top:0;z-index:20;width:100vw;margin:-32px 0 28px calc(50% - 50vw);background:var(--v3-paper-2);border-bottom:2px solid var(--v3-ink)}@media(max-width:767px){.bkn{margin-top:-16px;margin-bottom:20px}}.bkn-inner{max-width:1200px;margin:0 auto;padding:8px 24px;box-sizing:border-box;display:flex;align-items:center;gap:14px;overflow-x:auto;scrollbar-width:none}.bkn-inner::-webkit-scrollbar{display:none}.bkn-brand{flex-shrink:0;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:800;color:var(--v3-ink);text-decoration:none;white-space:nowrap}.bkn-brand img{width:20px;height:27px;-o-object-fit:contain;object-fit:contain;flex-shrink:0}.bkn-links{display:flex;gap:6px;align-items:center;padding-left:14px;border-left:2px solid var(--v3-line)}.bkn-links a{flex-shrink:0;display:inline-flex;align-items:center;min-height:36px;padding:0 14px;border:2px solid transparent;border-radius:999px;font-size:14px;font-weight:700;color:var(--v3-ink-2);text-decoration:none;white-space:nowrap}.bkn-links a:hover{color:var(--v3-ink);border-color:var(--v3-ink)}.bkn-links a[aria-current=page]{color:var(--v3-paper);background:var(--v3-ink);border-color:var(--v3-ink)}.bk-buy{background:var(--v3-card);border:2px solid var(--v3-ink);border-radius:18px;box-shadow:var(--v3-shadow);padding:22px 26px;margin:0;scroll-margin-top:7rem;color:var(--v3-ink)}.bk-buy h2{font-size:24px;margin:0 0 12px}.bk-buy-list{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.bk-buy-list a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border:2px solid var(--v3-ink);border-radius:999px;background:var(--v3-paper);color:var(--v3-ink);font-size:15px;font-weight:700;text-decoration:none}.bk-buy-list a:hover{background:var(--v3-tint-yellow)}.bk-buy-pending{color:var(--v3-ink);line-height:1.8;margin:0;font-size:15.5px}.bk-buy-note{color:var(--v3-ink-2);font-size:14.5px;margin:12px 0 0;line-height:1.7}.bk-buy-note a{color:var(--v3-blue-t);font-weight:700}.bk-chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 0}.bk-chip{display:inline-flex;align-items:center;min-height:28px;border-radius:999px;font-size:13px;font-weight:700;line-height:1;padding:0 10px;background:var(--v3-paper-2);color:var(--v3-ink-2);text-decoration:none}a.bk-chip:hover{text-decoration:underline;text-underline-offset:3px}.bk-chip--free{background:var(--v3-tint-yellow);color:var(--v3-ink)}.bk-shell{color:var(--v3-ink);padding-bottom:24px}.bk-shell>.bk-masthead,.bk-shell>.bkp-body,.bk-shell>.bkp-end,.bk-shell>.bkp-pager,.bk-shell>.bka-list,.bk-shell>div{max-width:820px;margin-left:auto;margin-right:auto}.bk-masthead{padding:8px 0 28px;border-bottom:2px solid var(--v3-ink)}.bk-crumb{font-size:14px;color:var(--v3-ink-2);margin:0 0 10px}.bk-crumb a{color:inherit;text-decoration:none}.bk-crumb a:hover{text-decoration:underline}.bk-eyebrow{display:inline-flex;font-size:14px;font-weight:700;color:var(--v3-blue-t);margin:0 0 6px}.bk-masthead h1{font-size:clamp(32px,4vw,48px);line-height:1.2;margin:0 0 12px}.bk-masthead-lead{color:var(--v3-ink-2);font-size:17px;line-height:1.8;margin:0;max-width:40em}.bkp-body{padding:32px 0 0}.bkp-body h2{font-size:clamp(24px,2.6vw,30px);margin:48px 0 16px;padding-top:20px;border-top:2px dashed var(--v3-line)}.bkp-body h3{font-size:20px;margin:32px 0 12px;letter-spacing:0}.bkp-body p{color:var(--v3-ink);line-height:1.95;margin:0 0 1.25rem}.bkp-body ul,.bkp-body ol{color:var(--v3-ink);line-height:1.95;margin:0 0 1.25rem;padding-left:1.6rem}.bkp-body ul{list-style:disc outside}.bkp-body ol{list-style:decimal outside}.bkp-body li::marker{color:var(--v3-ink-2)}.bkp-body li{margin-bottom:.4rem}.bkp-body a{color:var(--v3-blue-t)}.bkp-body pre{background:var(--v3-paper-2);border:2px solid var(--v3-ink);border-radius:12px;padding:1rem 1.15rem;overflow-x:auto;font-size:.88rem;line-height:1.7;margin:0 0 1.5rem}.bkp-body code{font-family:var(--font-mono, monospace);font-size:.9em}.bkp-body :not(pre)>code{background:var(--v3-paper-2);border-radius:6px;padding:.1em .35em}.bkp-body blockquote{border-left:4px solid var(--v3-yellow);margin:0 0 1.5rem;padding:.25rem 0 .25rem 1.15rem;font-size:1em;font-style:normal;color:var(--v3-ink-2)}.bkp-body table{width:100%;border-collapse:collapse;margin:0 0 1.5rem;font-size:.92rem}.bkp-body th,.bkp-body td{border:1px solid var(--v3-line);padding:.6rem .8rem;text-align:left;line-height:1.7}.bkp-body th{background:var(--v3-paper-2)}.bkp-figure{margin:2rem 0}.bkp-figure img{display:block;width:100%;height:auto;border:2px solid var(--v3-ink);border-radius:14px}.bkp-figure figcaption{font-size:14px;color:var(--v3-ink-2);margin-top:.6rem;line-height:1.7}.bkp-callout{background:var(--v3-tint-teal);border:2px solid var(--v3-ink);border-radius:16px;padding:18px 22px;margin:0 0 1.75rem}.bkp-callout p{margin:0 0 .75rem;font-size:15.5px;line-height:1.85}.bkp-callout p:last-child{margin-bottom:0}.bkp-callout-title{font-weight:800;color:var(--v3-ink)}.bkp-meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:14px;color:var(--v3-ink-2);margin:14px 0 0}.bkp-end{background:var(--v3-tint-yellow);border:2px solid var(--v3-ink);border-radius:18px;box-shadow:var(--v3-shadow);padding:26px 28px;margin:48px 0 0;color:var(--v3-ink)}.bkp-end h2{font-size:26px;margin:0 0 10px;border:0;padding:0}.bkp-end p{color:var(--v3-ink-2);line-height:1.85;margin:0 0 18px}.bkp-end-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px}.bkp-pager{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;margin-top:32px;padding-top:16px;border-top:2px solid var(--v3-line)}.bkp-pager a{color:var(--v3-blue-t);font-weight:700;display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}.bks-item{margin:48px 0 0}.bks-item h2{font-size:clamp(24px,2.6vw,30px);margin:0 0 8px}.bks-blurb{color:var(--v3-ink-2);line-height:1.85;margin:0 0 18px}.bks-frame{position:relative;aspect-ratio:16 / 9;border:2px solid var(--v3-ink);border-radius:18px;box-shadow:var(--v3-shadow);background:var(--v3-paper-2);overflow:hidden}.bks-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.bks-facade{position:absolute;inset:0;width:100%;height:100%;padding:0;border:0;background-color:var(--v3-paper-2);background-size:cover;background-position:center;cursor:pointer;display:flex;align-items:center;justify-content:center}.bks-facade:after{content:"";position:absolute;inset:0;background:#1a171447}.bks-facade-label{position:relative;z-index:1;background:var(--v3-yellow);color:#1a1714;border:2px solid #1A1714;border-radius:14px;box-shadow:4px 4px #1a1714;font-size:17px;font-weight:900;padding:12px 24px}.bks-facade:hover .bks-facade-label{transform:translate(-1px,-1px)}.bks-actions{display:flex;flex-wrap:wrap;gap:4px 18px;align-items:center;margin-top:12px;font-size:14.5px;color:var(--v3-ink-2)}.bks-actions a{color:var(--v3-blue-t);font-weight:700;display:inline-flex;align-items:center;min-height:44px}.bks-teaching{background:var(--v3-card);border:2px solid var(--v3-ink);border-radius:18px;padding:24px 26px;margin:56px 0 0}.bks-teaching h2{font-size:24px;margin:0 0 8px}.bks-teaching p{color:var(--v3-ink-2);line-height:1.85;margin:0 0 18px}.bks-teaching .bks-frame{margin-bottom:12px}.bka-list{list-style:none;padding:0;margin:28px 0 0;display:flex;flex-direction:column;gap:16px}.bka-card{display:flex;gap:18px;background:var(--v3-card);border:2px solid var(--v3-ink);border-radius:16px;box-shadow:3px 3px 0 var(--v3-ink);padding:16px;color:var(--v3-ink);text-decoration:none;transition:transform .15s ease}.bka-card:hover{transform:translateY(-2px)}.bka-card:hover h3{text-decoration:underline;text-underline-offset:3px}.bka-thumb{flex-shrink:0;width:132px;height:88px;-o-object-fit:cover;object-fit:cover;border:2px solid var(--v3-ink);border-radius:10px}.bka-card h3{color:var(--v3-ink);font-size:18px;line-height:1.5;margin:0 0 6px;letter-spacing:0}.bka-why{color:var(--v3-ink-2);font-size:15px;line-height:1.75;margin:0}.bka-date{display:block;color:var(--v3-ink-2);font-size:13px;font-weight:600;margin-top:8px}.bka-subhead{font-size:clamp(22px,2.4vw,28px);margin:48px 0 0}.bka-subnote{color:var(--v3-ink-2);font-size:15px;margin:6px 0 0;line-height:1.7}@media(max-width:640px){.bka-card{flex-direction:column;gap:12px}.bka-thumb{width:100%;height:160px}.bkp-end{padding:20px}}.bkp-end--plain{background:var(--v3-card);box-shadow:none}.bkp-end a:not(.v3-btn):not(.v3-link-arrow){color:var(--v3-blue-t);font-weight:700}.bkp-end .bk-buy-list{margin-top:14px}.bkp-end .bk-buy-list a{color:var(--v3-ink)}.bk-shell>[data-next-step]{margin-top:48px}.bka-subnote a,.bks-teaching a:not(.v3-btn){color:var(--v3-blue-t);font-weight:700}.bka-subnote--gap{margin-top:40px}.bkp-body pre{background-color:var(--v3-paper-2)!important;color:var(--v3-ink)}.bkp-body pre code{color:inherit}