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svg{display:block;margin:0 auto;max-width:100%;height:auto}.diagram svg text{font-family:var(--font-sans)}.diagram .box{stroke:var(--border-strong);stroke-width:1.5}.diagram .box:not([fill]){fill:var(--bg-soft)}[data-theme=dark] .diagram svg text{fill:var(--ink)}[data-theme=dark] .diagram svg rect[fill="#f8f9fa"],[data-theme=dark] .diagram svg rect[fill="#ffffff"],[data-theme=dark] .diagram svg rect[fill=white]{fill:var(--bg-soft)!important}[data-theme=dark] .diagram svg rect[stroke="#c0c0c0"],[data-theme=dark] .diagram svg rect[stroke="#dddddd"]{stroke:var(--border-strong)!important}[data-theme=dark] .diagram svg text[fill="#19223b"],[data-theme=dark] .diagram svg text[fill="#1d3557"],[data-theme=dark] .diagram svg text[fill="#222"],[data-theme=dark] .diagram svg text[fill="#2a4a73"],[data-theme=dark] .diagram svg text[fill="#666666"],[data-theme=dark] .diagram svg text[fill="#717171"]{fill:var(--ink)!important}[data-theme=dark] .diagram svg text[fill="#00595d"],[data-theme=dark] 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srgb,var(--border) 50%,transparent);overflow:hidden;margin:18px 0;box-shadow:none}.config-example .config-header{background:var(--bg-soft);padding:8px 16px;font-family:var(--font-mono);font-size:12px;color:var(--ink-2);font-weight:600;border-bottom:1px solid var(--border)}.config-example pre{margin:0;border-radius:0;border:none;background:var(--bg)}main{flex:1 1;padding:44px 64px 72px;max-width:920px;margin:0 auto;min-width:0;transition:margin .3s ease,max-width .3s ease}section{margin-bottom:72px;scroll-margin-top:24px}section h2{color:var(--ink);font-family:var(--font-heading);font-size:28px;border:none;padding-bottom:0;margin-top:0;margin-bottom:6px;font-weight:700;letter-spacing:-.03em;line-height:1.22;text-wrap:balance}[data-theme=dark] section h2{color:#f4f4f5}[data-theme=dark] li,[data-theme=dark] p{color:#d4d4d8}[data-theme=dark] section .lede{color:#a1a1aa}section h2 .num{font-family:var(--font-mono);color:var(--ink-3);margin-right:12px;font-weight:400;font-size:14px;vertical-align:5px;opacity:.8;letter-spacing:.02em}section .lede{color:var(--ink-2);font-style:normal;margin-bottom:40px;margin-top:10px;font-size:16px;line-height:1.65;max-width:660px;letter-spacing:-.004em}section h3{color:var(--ink);font-size:19px;margin-top:44px;margin-bottom:10px;font-weight:600;letter-spacing:-.02em;text-wrap:balance}section h3,section h4{font-family:var(--font-heading)}section h4{color:var(--ink-2);font-size:11.5px;margin-top:28px;margin-bottom:8px;text-transform:uppercase;letter-spacing:.07em;font-weight:700}p{color:var(--ink);line-height:1.7}ol,p,ul{margin:14px 0}ol,ul{padding-left:22px}li{margin:5px 0;line-height:1.65}li,strong{color:var(--ink)}strong{font-weight:600}em{color:var(--ink)}a.ref{color:var(--link);text-decoration:none;border-bottom:1px solid transparent;font-size:13.5px}a.ref:hover{border-bottom-color:var(--link)}a.ref:before{content:"↗ 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td{border-bottom:none}th{background:var(--bg-soft);color:var(--ink-2);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em}.qbox{background:var(--panel);border:1px solid color-mix(in srgb,var(--border) 70%,transparent);border-left:2.5px solid var(--border-strong);padding:0;border-radius:var(--radius-md);margin:20px 0;box-shadow:none;overflow:hidden;transition:box-shadow .2s cubic-bezier(.22,1,.36,1),border-color .2s cubic-bezier(.22,1,.36,1)}.qbox--expanded{box-shadow:var(--shadow-sm)}.qbox-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:4px;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin:14px 18px 0;font-family:var(--font-heading);border:1px solid transparent}.qbox.medium .qbox-badge{background:color-mix(in srgb,var(--info) 8%,transparent);color:var(--info);border-color:color-mix(in srgb,var(--info) 20%,transparent)}.qbox.hard .qbox-badge{background:color-mix(in srgb,var(--danger) 8%,transparent);color:var(--danger);border-color:color-mix(in srgb,var(--danger) 20%,transparent)}.qbox.staff .qbox-badge{background:color-mix(in srgb,var(--warn) 8%,transparent);color:var(--warn);border-color:color-mix(in srgb,var(--warn) 20%,transparent)}.qbox.senior .qbox-badge{background:color-mix(in srgb,var(--good) 8%,transparent);color:var(--good);border-color:color-mix(in srgb,var(--good) 20%,transparent)}.qbox-badge-label{line-height:1}.qbox .q{color:var(--ink);font-weight:600;font-size:14.5px;line-height:1.55;padding:10px 18px 0;margin-bottom:12px}.qbox .q,.qbox-toggle-btn{font-family:var(--font-sans)}.qbox-toggle-btn{display:inline-flex;align-items:center;gap:5px;background:transparent;color:var(--ink-2);border:1px solid color-mix(in srgb,var(--border-strong) 60%,transparent);padding:6px 12px;border-radius:var(--radius-sm);font-size:12px;font-weight:500;cursor:pointer;margin:0 18px 14px;transition:all .15s ease}.qbox-toggle-btn:hover{background:var(--bg-soft);color:var(--ink);border-color:var(--border-strong)}.qbox-toggle-icon{font-size:9px;line-height:1;opacity:.6}.qbox-answer-wrapper{background:color-mix(in srgb,var(--bg-soft) 60%,transparent);border-top:1px solid color-mix(in srgb,var(--border) 60%,transparent);padding:16px 18px;animation:qbox-reveal .2s ease forwards}@keyframes qbox-reveal{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.qbox .a{color:var(--ink);font-size:14px;line-height:1.72}.qbox .a strong{color:var(--ink);font-weight:600}.qbox.hard{border-left-color:var(--danger)}.qbox.staff{border-left-color:var(--warn)}.qbox.senior{border-left-color:var(--good)}.pill{display:inline-block;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:600;margin:0 4px 0 0;border:1px solid var(--border-strong);background:var(--bg)}.pill.green{background:rgba(16,185,129,.1);color:var(--good);border-color:rgba(16,185,129,.2)}.pill.amber{background:rgba(245,158,11,.1);color:var(--warn);border-color:rgba(245,158,11,.2)}.pill.red{background:rgba(239,68,68,.1);color:var(--danger);border-color:rgba(239,68,68,.2)}.pill.blue{background:color-mix(in srgb,var(--ink-3) 10%,transparent);color:var(--ink-2);border-color:color-mix(in srgb,var(--ink-3) 20%,transparent)}.grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}.card{background:var(--bg);border:1px solid color-mix(in srgb,var(--border) 60%,transparent);border-radius:var(--radius-md);padding:20px;box-shadow:none;transition:border-color .15s ease}.card:hover{border-color:var(--border-strong)}.card h5{margin:0 0 8px;color:var(--ink);font-size:14px;font-weight:600}.meta{background:color-mix(in srgb,var(--bg-soft) 70%,transparent);border-left:2px solid var(--ink-3);border-radius:var(--radius-sm);color:var(--ink-2)}.meta,.warn-box{padding:14px 18px;margin:18px 0;font-size:14px}.warn-box{background:color-mix(in srgb,var(--warn) 5%,transparent);border-left:2.5px solid var(--warn);border-radius:0 var(--radius-sm) var(--radius-sm) 0;line-height:1.6;color:var(--ink)}.danger-box{background:color-mix(in srgb,var(--danger) 4%,transparent);border-left:2.5px solid var(--danger)}.danger-box,.tip-box{padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:18px 0;font-size:14px;line-height:1.6;color:var(--ink)}.tip-box{background:color-mix(in srgb,var(--good) 4%,transparent);border-left:2.5px solid var(--good)}.toc-grid{display:grid;grid-template-columns:1fr 1fr 1fr;grid-gap:10px;gap:10px;font-size:13px}.toc-grid a{color:var(--ink-2);text-decoration:none;padding:4px 0;display:block}.toc-grid a:hover{color:var(--ink)}.ref-list{background:var(--bg-soft);border-radius:8px;border:none;list-style-position:inside;padding:16px 24px 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6px}.footer-sep{opacity:.4}.footer-credit-link{color:var(--accent-2);text-decoration:none;font-weight:500;transition:opacity .15s ease}.footer-credit-link:hover{opacity:.75;text-decoration:underline;text-underline-offset:2px}.bottom-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:48px;padding:0 20px;border-top:1px solid color-mix(in srgb,var(--border) 50%,transparent);background:var(--bg);flex-shrink:0;grid-gap:12px;gap:12px;z-index:210;position:-webkit-sticky;position:sticky;bottom:0}.bottom-bar-left,.bottom-bar-right{display:flex;align-items:center;gap:8px;min-width:0}.bottom-bar-right{justify-content:flex-end}.bottom-bar-center{display:flex;align-items:center;gap:10px;justify-content:center;min-width:0}.bb-focus-toggle{display:flex;align-items:center;gap:8px;background:none;border:none;cursor:pointer;padding:4px 2px;color:var(--ink-2);font-size:12px;font-family:inherit;transition:color .15s ease}.bb-focus-toggle:hover{color:var(--ink)}.bb-toggle-track{width:30px;height:17px;border-radius:9px;background:var(--border-strong);position:relative;flex-shrink:0;transition:background .2s ease}.bb-focus-toggle.active .bb-toggle-track,.bb-option-row.active .bb-toggle-track{background:var(--accent-2)}.bb-toggle-thumb{position:absolute;top:2px;left:2px;width:13px;height:13px;border-radius:50%;background:#fff;transition:transform .2s ease}.bb-focus-toggle.active .bb-toggle-thumb,.bb-option-row.active .bb-toggle-thumb{transform:translateX(13px)}.bb-focus-label,.bb-nav-btn{font-size:12px;font-weight:500;white-space:nowrap}.bb-nav-btn{display:flex;align-items:center;gap:4px;padding:5px 10px;border-radius:var(--radius-sm);border:1px solid color-mix(in srgb,var(--border) 70%,transparent);background:none;color:var(--ink-2);font-family:inherit;cursor:pointer;transition:color .15s ease,border-color .15s ease,background .15s ease}.bb-nav-btn:hover:not(:disabled){color:var(--ink);border-color:var(--border-strong);background:color-mix(in srgb,var(--panel) 60%,transparent)}.bb-nav-btn:disabled{opacity:.3;cursor:default}.bb-section-info{display:flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--panel) 60%,transparent);border:1px solid color-mix(in srgb,var(--border) 40%,transparent)}.bb-section-icon{color:var(--ink-3);flex-shrink:0}.bb-section-title{font-size:12px;color:var(--ink);max-width:260px;overflow:hidden;text-overflow:ellipsis}.bb-section-pos,.bb-section-title{font-weight:500;white-space:nowrap}.bb-section-pos{font-size:11px;color:var(--ink-3);border-left:1px solid color-mix(in srgb,var(--border) 60%,transparent);padding-left:8px;margin-left:2px}.bb-sidebar-context{display:flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--accent) 8%,var(--panel) 60%);border:1px solid color-mix(in srgb,var(--accent) 25%,var(--border) 40%)}.bb-sidebar-group{font-size:11px;font-weight:600;color:var(--accent);white-space:nowrap;text-transform:uppercase;letter-spacing:.04em}.bb-sidebar-sep{font-size:11px;color:var(--ink-3)}.bb-sidebar-done{display:flex;align-items:center;color:var(--accent);margin-left:2px}.bb-complete-group{display:flex;align-items:center;gap:10px;margin-left:12px;padding-left:14px;border-left:1px solid color-mix(in srgb,var(--border) 55%,transparent)}.bb-mark-btn{display:flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-sm);border:1px solid color-mix(in srgb,var(--border) 70%,transparent);background:none;color:var(--ink-2);font-size:12px;font-weight:500;font-family:inherit;cursor:pointer;transition:color .15s ease,border-color .15s ease,background .15s ease;white-space:nowrap}.bb-mark-btn:hover{color:var(--ink);border-color:var(--border-strong);background:color-mix(in srgb,var(--panel) 60%,transparent)}.bb-mark-btn--done{color:var(--accent-2);border-color:color-mix(in srgb,var(--accent-2) 40%,transparent);background:color-mix(in srgb,var(--accent-2) 8%,transparent)}.bb-mark-btn--done:hover{color:var(--ink);border-color:var(--border-strong);background:color-mix(in srgb,var(--panel) 60%,transparent)}.bb-options{position:relative}.bb-options-trigger{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);border:1px solid transparent;background:none;color:var(--ink-3);cursor:pointer;transition:color .15s ease,border-color .15s ease,background .15s ease}.bb-options-trigger:hover{color:var(--ink);background:color-mix(in srgb,var(--panel) 60%,transparent)}.bb-options-trigger.active{color:var(--accent-2);border-color:color-mix(in srgb,var(--accent-2) 30%,transparent);background:color-mix(in srgb,var(--accent-2) 8%,transparent)}.bb-options-popover{position:absolute;bottom:calc(100% + 8px);right:0;min-width:220px;padding:6px;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--panel);box-shadow:var(--shadow-lg);z-index:220;display:flex;flex-direction:column;gap:2px}.bb-option-row{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;padding:8px 10px;border-radius:var(--radius-sm);border:none;background:none;cursor:pointer;font-family:inherit;text-align:left;transition:background .15s ease}.bb-option-row:hover{background:color-mix(in srgb,var(--panel-2) 80%,transparent)}.bb-option-text{display:flex;flex-direction:column;gap:1px}.bb-option-label{font-size:13px;font-weight:500;color:var(--ink)}.bb-option-hint{font-size:11px;color:var(--ink-3)}.focus-mode .learning-course-sidebar,.focus-mode .learning-right-sidebar,.focus-mode .shadcn-sidebar{display:none}.signal{background:color-mix(in srgb,var(--bg-soft) 60%,transparent);border:1px solid color-mix(in srgb,var(--border) 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