.pb-shell{background:var(--bg);height:100vh;display:flex;position:relative;overflow:hidden}.pb-left-nav{border-right:1px solid var(--border-subtle);background:var(--bg);flex-direction:column;flex-shrink:0;width:240px;height:calc(100vh - 48px);display:flex;position:fixed;top:48px;left:0;overflow:hidden}.pb-nav-header{border-bottom:1px solid var(--border-subtle);flex-shrink:0;padding:16px}.pb-nav-header-label{font-size:var(--fs-xs);line-height:var(--lh-xs);color:var(--muted);margin-bottom:0;padding:0 8px;font-weight:500;display:block}.pb-nav-guide-btn{border-radius:var(--r-md);cursor:pointer;width:100%;min-height:32px;color:var(--text);font-size:14px;font-weight:500;line-height:20px;font-family:var(--font);text-align:left;box-sizing:border-box;background:0 0;border:none;justify-content:space-between;align-items:center;gap:8px;padding:6px 8px;display:flex}.pb-nav-guide-dropdown{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--r-md);z-index:50;position:absolute;top:calc(100% + 4px);left:0;right:0;overflow:hidden}.pb-nav-guide-dropdown-item{text-align:left;width:100%;font-size:var(--fs-sm);color:var(--muted);cursor:pointer;font-family:var(--font);background:0 0;border:none;padding:8px 12px;display:block}.pb-nav-guide-dropdown-item.active{color:var(--text);background:var(--surface-raised)}.pb-nav-scroll{flex:1;overflow-y:auto}.pb-left-nav-label{font-size:var(--fs-xs);color:var(--muted);padding:8px 12px;font-weight:500;display:block}.pb-nav-groups{padding:16px 0}.pb-nav-group{margin-bottom:4px}.pb-nav-group-header{border-radius:var(--r-md);cursor:pointer;min-height:32px;color:var(--muted);-webkit-user-select:none;user-select:none;align-items:center;gap:8px;margin:0 8px;padding:6px 8px;font-size:13px;font-weight:500;line-height:20px;display:flex}.pb-nav-group-items{flex-direction:column;gap:2px;margin:2px 0 8px;padding:4px 8px 4px 16px;display:flex}.pb-nav-item{border-radius:var(--r-md);min-height:32px;color:var(--muted);align-items:flex-start;gap:10px;padding:6px 8px;font-size:13px;font-weight:500;line-height:20px;text-decoration:none;transition:background .1s,color .1s;display:flex}.pb-nav-item-active{background:var(--surface-raised);color:var(--text)}.pb-nav-num{width:20px;height:20px;color:var(--text-faint);font-size:11px;line-height:20px;font-family:var(--font-mono);flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;display:flex}.pb-nav-item-active .pb-nav-num{color:var(--text-faint)}.pb-nav-title{color:var(--muted);font-size:13px;line-height:20px}.pb-nav-item-active .pb-nav-title{color:var(--text);font-weight:500}.pb-nav-footer{border-top:1px solid var(--border-subtle);background:var(--bg);flex-shrink:0;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.pb-focus-label{font-size:var(--fs-xs);line-height:var(--lh-xs);color:var(--muted);font-weight:500}.pb-main{flex:1;min-width:0;height:calc(100vh - 48px);margin-top:48px;margin-left:240px;margin-right:252px;padding-bottom:80px;overflow-y:auto}.pb-article{max-width:700px;margin:0 auto;padding:48px 40px 40px}.pb-article-title{letter-spacing:-.02em;color:var(--text);margin:0 0 8px;font-size:30px;font-weight:600;line-height:36px}.pb-article-subtitle{color:var(--text-secondary);margin:12px 0 0;font-size:16px;font-weight:400;line-height:26px}.pb-article-header-divider{border:none;border-top:1px solid var(--border-subtle);margin:32px 0 20px}.pb-article-meta-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.pb-article-meta-left{font-size:var(--fs-xs);line-height:var(--lh-xs);color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;display:flex}.pb-article-meta-dot{background:var(--muted);border-radius:50%;flex-shrink:0;width:3px;height:3px}.pb-article-meta-divider{border:none;border-top:1px solid var(--border-subtle);margin:20px 0 40px}.pb-article-content{font-size:var(--fs-prose);line-height:var(--lh-prose-lg);color:var(--text-secondary);font-weight:400}.pb-article-content p{margin:0 0 1.25em}.pb-article-content h2{color:var(--text);margin:72px 0 16px;font-size:24px;font-weight:600;line-height:28px}.pb-article-content>h2:first-child{margin-top:0}.pb-article-content h3{color:var(--text);margin:48px 0 12px;font-size:20px;font-weight:600;line-height:28px}.pb-article-content h4{color:var(--text);margin:32px 0 8px;font-size:16px;font-weight:600;line-height:24px}.pb-article-content ul,.pb-article-content ol{margin:0 0 1.25em;padding-left:24px}.pb-article-content li{margin-bottom:8px}.pb-article-content li::marker{color:var(--text-faint)}.pb-article-content strong{color:var(--text);font-weight:600}.pb-article-content a{color:var(--text);text-underline-offset:3px;text-decoration:underline;-webkit-text-decoration-color:var(--border-control);text-decoration-color:var(--border-control);font-weight:500;transition:text-decoration-color .1s}.pb-article-content code{color:var(--code-text);background:var(--border-control);font-size:13.5px;font-weight:500;font-family:var(--font-mono);border-radius:5px;padding:2.7px 5.4px}.pb-article-content pre{background:var(--input-bg);border:1px solid var(--border-subtle);border-radius:var(--r-lg);margin:0 0 1.25em;padding:16px;font-size:13.5px;line-height:22px;overflow-x:auto}.pb-article-content pre code{font-size:inherit;background:0 0;border-radius:0;padding:0}.pb-article-content blockquote{border-left:4px solid var(--border-control);color:var(--text-secondary);margin:0 0 1.25em;padding:0 0 0 15px;font-size:15px;font-weight:500}.pb-callout-body{font-size:var(--fs-sm);color:var(--text-secondary);line-height:1.7}.pb-callout-body p{margin:0 0 6px}.pb-callout-body p:last-child{margin-bottom:0}.pb-callout-body ul,.pb-callout-body ol{margin:0 0 4px;padding-left:20px}.pb-callout-body li{margin-bottom:4px}.pb-callout-body strong{color:var(--text);font-weight:600}.pb-callout-body a{color:var(--text);text-underline-offset:3px;text-decoration:underline}.pb-article-content hr{border:none;border-top:1px solid var(--border-subtle);margin:48px 0}.pb-article-img,.pb-article-content img{border-radius:var(--r-lg);border:1px solid var(--border-subtle);max-width:100%;height:auto;margin:24px 0;display:block}.pb-table-outer{border:1px solid var(--border-subtle);border-radius:var(--r-lg);margin:0 0 1.25em;overflow:hidden}.pb-table-scroll{-webkit-overflow-scrolling:touch;overflow-x:auto}.pb-article-content table{border-collapse:collapse;min-width:100%}.pb-article-content th{border-bottom:1px solid var(--border-control);background:var(--surface-strong);color:var(--text);text-align:left;white-space:nowrap;padding:8px 16px;font-size:13px;font-weight:500}.pb-article-content td{border-bottom:1px solid var(--border-subtle);color:var(--text-secondary);font-size:var(--fs-prose);line-height:var(--lh-prose-lg);vertical-align:top;padding:16px}.pb-right-nav{border-left:1px solid var(--border-subtle);flex-shrink:0;width:252px;height:calc(100vh - 48px);padding:28px 16px 80px;position:fixed;top:48px;right:0;overflow-y:auto}.pb-right-nav-label{color:var(--muted);align-items:center;gap:8px;margin-bottom:14px;font-size:13px;font-weight:600;line-height:20px;display:flex}.pb-right-nav-items{border-left:2px solid var(--border-subtle);flex-direction:column;display:flex}.pb-right-nav-item{color:var(--muted);border-left:2px solid #0000;margin-bottom:8px;margin-left:-2px;padding:4px 0 4px 19px;font-size:13px;font-weight:500;line-height:20px;text-decoration:none;transition:color .1s;display:block}.pb-right-nav-item-active{color:var(--text);border-left-color:var(--text)}.pb-right-nav-item-h3{padding-left:35px}.pb-bottom-bar{background:var(--bg);border-top:1px solid var(--border-subtle);z-index:10;justify-content:space-between;align-items:center;height:48px;padding:0 24px;display:flex;position:fixed;bottom:0;left:240px;right:252px}.pb-bottom-left{align-items:center;gap:10px;min-width:160px;display:flex}.pb-focus-mode{cursor:pointer;align-items:center;gap:8px;display:flex}.pb-focus-label{font-size:var(--fs-xs);color:var(--text-faint)}.pb-toggle{width:36px;height:20px;position:relative}.pb-toggle input{opacity:0;width:0;height:0;position:absolute}.pb-toggle-slider{background:var(--border-control);cursor:pointer;border-radius:20px;transition:background .2s;position:absolute;inset:0}.pb-toggle-slider:before{content:"";background:var(--text-faint);border-radius:50%;width:14px;height:14px;transition:transform .2s,background .2s;position:absolute;top:3px;left:3px}.pb-toggle input:checked+.pb-toggle-slider{background:var(--accent-border)}.pb-toggle input:checked+.pb-toggle-slider:before{background:var(--accent);transform:translate(16px)}.pb-mobile-focus-toggle{display:none}.pb-bug-btn{width:28px;height:28px;color:var(--text-faint);cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;display:flex}.pb-focus-toc-btn{cursor:pointer;color:var(--muted);height:32px;font-family:var(--font);background:0 0;border:none;border-radius:6px;align-items:center;gap:4px;padding:4px;transition:color .15s;display:flex}.pb-bottom-center{align-items:center;gap:12px;display:flex}.pb-bottom-meta{color:var(--text-faint);font-size:var(--fs-xs);align-items:center;gap:8px;display:flex}.pb-guide-link{color:var(--text-secondary);white-space:nowrap;font-weight:500;text-decoration:none}.pb-count{font-size:var(--fs-xs);color:var(--text-faint);background:var(--surface-raised);border:1px solid var(--border-subtle);border-radius:4px;padding:1px 6px;font-family:monospace}.pb-bottom-right{justify-content:flex-end;align-items:center;gap:12px;min-width:160px;display:flex}.pb-nav-btn{align-items:center;gap:6px;text-decoration:none;display:flex}.pb-nav-btn-disabled{opacity:.35;cursor:not-allowed;align-items:center;gap:6px;display:flex}.pb-mark-btn-done{background:var(--success-bg)!important;border-color:var(--success-border)!important;color:var(--success-text)!important}.pb-loading{height:100vh;color:var(--text-faint);background:var(--bg);justify-content:center;align-items:center;font-size:13px;display:flex}.pb-topbar{background:var(--bg);border-bottom:1px solid var(--border-subtle);z-index:100;justify-content:space-between;align-items:center;height:48px;padding:0 24px;display:flex;position:fixed;top:0;left:0;right:0}.pb-topbar-left{align-items:center;display:flex}.pb-logo{letter-spacing:-.02em;color:var(--text);align-items:center;gap:6px;font-size:18px;font-weight:600;text-decoration:none;display:flex}.pb-logo-dot{background:var(--accent);width:22px;height:22px;color:var(--accent-fg);letter-spacing:-.04em;border-radius:6px;flex-shrink:0;place-items:center;font-size:13px;font-weight:700;display:grid}.pb-logo-x{color:var(--accent)}.pb-topbar-right{align-items:center;gap:10px;display:flex}.pb-topbar-icon-btn{cursor:pointer;width:32px;height:32px;color:var(--muted);background:0 0;border:1px solid #0000;border-radius:6px;place-items:center;display:grid}.pb-topbar-ghost{border:1px solid var(--border-control);color:var(--text-secondary);background:0 0;border-radius:6px;align-items:center;padding:6px 14px;font-size:13px;text-decoration:none;transition:border-color .12s,color .12s;display:inline-flex}.pb-topbar-primary{background:var(--accent);color:var(--accent-fg);border-radius:6px;align-items:center;padding:6px 14px;font-size:13px;font-weight:500;text-decoration:none;transition:background .12s;display:inline-flex}.pb-callout{border-radius:var(--r-md);border-left:3px solid;margin:24px 0;padding:12px 16px}.pb-callout-header{font-weight:600;font-size:var(--fs-sm);align-items:center;gap:6px;margin-bottom:8px;display:flex}.pb-callout-header:last-child{margin-bottom:0}.pb-callout-label{color:var(--text)}.pb-callout-note{background:var(--callout-note-bg);border-color:var(--callout-note-border)}.pb-callout-tip{background:var(--callout-tip-bg);border-color:var(--callout-tip-border)}.pb-callout-warning{background:var(--callout-warning-bg);border-color:var(--callout-warning-border)}.pb-callout-important{background:var(--callout-important-bg);border-color:var(--callout-important-border)}.pb-callout-caution{background:var(--callout-caution-bg);border-color:var(--callout-caution-border)}.pb-callout-note .pb-callout-header{color:var(--callout-note-color)}.pb-callout-tip .pb-callout-header{color:var(--callout-tip-color)}.pb-callout-warning .pb-callout-header{color:var(--callout-warning-color)}.pb-callout-important .pb-callout-header{color:var(--callout-important-color)}.pb-callout-caution .pb-callout-header{color:var(--callout-caution-color)}@media (max-width:768px){.pb-article-title{font-size:22px;line-height:28px}.pb-article-content h2{margin-top:48px;font-size:18px}.pb-article-content h3{margin-top:32px;font-size:16px}.pb-article-content img{max-width:100%;height:auto}}@media (hover:hover){.pb-nav-guide-btn:hover{background:var(--surface-raised)}.pb-nav-guide-dropdown-item:hover{color:var(--text);background:var(--surface-raised)}.pb-nav-item:hover{color:var(--text);background:#ffffff0d}.pb-nav-group-header:hover{color:var(--text)}.pb-article-content a:hover{-webkit-text-decoration-color:var(--text);text-decoration-color:var(--text)}.pb-right-nav-item:hover{color:var(--text-secondary)}.pb-bug-btn:hover{color:var(--text);background:#ffffff0a}.pb-focus-toc-btn:hover,.pb-guide-link:hover{color:var(--text)}.pb-topbar-icon-btn:hover{color:var(--text);background:#ffffff0a}.pb-topbar-ghost:hover{border-color:var(--border-control);color:var(--text)}.pb-topbar-primary:hover{background:var(--accent-hover)}}