:root{--paper:#fbfaf7;--panel:#fff;--ink:#1c1c1a;--ink-soft:#4a4a45;--ink-faint:#8a8a82;--line:#e2e0d8;--line-strong:#cfccc0;--accent:#1f5c4c;--accent-soft:#e8efe9;--flag:#9c5a1f;--flag-soft:#f5ece0;--sidebar-w:268px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--paper);color:var(--ink);font-family:Public Sans,sans-serif;font-size:15.5px;line-height:1.7}h1,h2,h3,.serif{font-family:"Source Serif 4",serif}code,.mono{font-family:IBM Plex Mono,monospace}.app{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-w);border-right:1px solid var(--line);background:var(--panel);flex-shrink:0;height:100vh;padding:36px 0;position:sticky;top:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--line);margin-bottom:12px;padding:0 28px 24px}.sidebar-title{letter-spacing:-.01em;font-family:"Source Serif 4",serif;font-size:19px;font-weight:700}.sidebar-title em{color:var(--accent);font-style:normal}.sidebar-sub{color:var(--ink-faint);text-transform:uppercase;letter-spacing:.07em;margin-top:6px;font-size:11.5px}.toc-group-label{text-transform:uppercase;letter-spacing:.1em;color:var(--ink-faint);padding:16px 28px 6px;font-size:10.5px}.toc-item{color:var(--ink-soft);cursor:pointer;border-left:2px solid #0000;padding:7px 28px;font-size:13.5px;text-decoration:none;transition:all .15s;display:block}.toc-item:hover{background:var(--accent-soft);color:var(--ink)}.toc-item.active{color:var(--accent);border-left-color:var(--accent);background:var(--accent-soft);font-weight:600}.toc-item .num{width:26px;color:var(--ink-faint);font-family:IBM Plex Mono,monospace;font-size:11px;display:inline-block}.toc-item.active .num{color:var(--accent)}.main{flex-direction:column;flex:1;min-width:0;height:100vh;display:flex}.content-scroll{flex:1;justify-content:center;padding:80px 48px 90px;display:flex;overflow-y:auto}.page{width:100%;max-width:620px;display:none}.page.active{display:block}.page-kicker{letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:18px;font-family:IBM Plex Mono,monospace;font-size:11.5px}.page h1{letter-spacing:-.01em;margin-bottom:22px;font-size:34px;font-weight:700;line-height:1.2}.page .lede{color:var(--ink-soft);margin-bottom:30px;font-family:"Source Serif 4",serif;font-size:16.5px}.page p{color:var(--ink-soft);margin-bottom:18px}.page p strong{color:var(--ink);font-weight:600}.page ul,.page ol{color:var(--ink-soft);margin:0 0 18px 22px}.page li{margin-bottom:8px}.page.cover.active{flex-direction:column;justify-content:center;min-height:100%;display:flex}.cover .page-kicker{margin-bottom:26px}.cover h1{margin-bottom:24px;font-size:54px;line-height:1.05}.cover h1 em{color:var(--accent);font-style:normal}.cover .lede{max-width:480px;font-size:18px}.cover-meta{flex-wrap:wrap;gap:28px;margin-top:44px;display:flex}.cover-stat{border-top:2px solid var(--accent);padding-top:10px}.cover-stat .v{font-family:"Source Serif 4",serif;font-size:22px;font-weight:700}.cover-stat .l{text-transform:uppercase;letter-spacing:.07em;color:var(--ink-faint);margin-top:2px;font-size:11px}.disclaimer{color:var(--ink-faint);border-top:1px solid var(--line);margin-top:48px;padding:16px 20px;font-size:12px;line-height:1.6}.cover-authors{grid-template-columns:1fr 1fr;gap:12px;margin-top:18px;margin-bottom:16px;display:grid}.ca-card{background:var(--panel);border:1px solid var(--line);border-radius:8px;align-items:center;gap:12px;padding:14px 16px;display:flex}.ca-avatar{object-fit:cover;border-radius:50%;flex-shrink:0;width:40px;height:40px}.ca-avatar-fallback{background:var(--accent-soft);width:40px;height:40px;color:var(--accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-family:IBM Plex Mono,monospace;font-size:13px;font-weight:600}.ca-body{flex:1;min-width:0}.ca-name{font-size:14px;font-weight:600;line-height:1.3}.ca-role{color:var(--ink-faint);margin-top:1px;font-size:11.5px}.ca-x{color:var(--ink-soft);align-items:center;gap:4px;margin-top:4px;font-size:12px;text-decoration:none;display:inline-flex}.ca-x:hover{color:var(--ink)}.ca-x svg{width:12px;height:12px}.def-box{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--panel);margin:26px 0;padding:26px 28px}.def-box .db-label{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:10px;font-family:IBM Plex Mono,monospace;font-size:11px}.def-box p{margin-bottom:0;font-size:14.5px}.glossary{margin:20px 0}.glossary dt{margin-top:18px;margin-bottom:4px;font-size:15px;font-weight:600}.glossary dt span{color:var(--ink-faint);font-size:12.5px;font-weight:400}.glossary dd{color:var(--ink-soft);margin:0;font-size:14px;line-height:1.5}.glossary dd:last-of-type{margin-bottom:0}.page ol{padding-left:20px}.page ol li{margin-bottom:8px;line-height:1.55}.page code,.callout code{background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:1px 6px;font-family:IBM Plex Mono,monospace;font-size:13px}.callout{background:var(--accent-soft);border-left:3px solid var(--accent);margin:24px 0;padding:18px 22px;font-size:14px}.callout strong{color:var(--accent)}.callout.warn{background:var(--flag-soft);border-left-color:var(--flag)}.callout.warn strong{color:var(--flag)}.pullquote{border-left:3px solid var(--accent);background:var(--accent-soft);margin:28px 0;padding:20px 24px}.pullquote p{color:var(--ink);margin:0;font-family:"Source Serif 4",serif;font-size:16px;font-style:italic;line-height:1.6}.pullquote cite{text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);margin-top:10px;font-family:IBM Plex Mono,monospace;font-size:11px;font-style:normal;display:block}.page-img{text-align:center;margin:24px 0}.page-img img{border:1px solid var(--line);cursor:pointer;border-radius:4px;max-width:100%;height:auto;transition:opacity .2s}.page-img img:hover{opacity:.85}.lightbox-overlay{z-index:1000;background:#000000e6;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.lightbox-close{color:#fff;cursor:pointer;z-index:1001;background:0 0;border:none;padding:8px;font-size:32px;line-height:1;position:absolute;top:16px;right:20px}.lightbox-content{justify-content:center;align-items:center;max-width:90vw;max-height:90vh;display:flex}.lightbox-content img{object-fit:contain;border-radius:4px;max-width:100%;max-height:90vh}.signal{text-transform:uppercase;letter-spacing:.08em;border:1px solid var(--line-strong);align-items:center;gap:6px;margin-bottom:22px;padding:5px 12px;font-family:IBM Plex Mono,monospace;font-size:11px;display:inline-flex}.signal.good{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}.signal.bad{color:var(--flag);border-color:var(--flag);background:var(--flag-soft)}.img-placeholder{border:1px dashed var(--line-strong);aspect-ratio:16/9;color:var(--ink-faint);text-align:center;background:repeating-linear-gradient(135deg,#f2f1ec 0 10px,#ecece5 10px 11px);flex-direction:column;justify-content:center;align-items:center;gap:6px;margin:28px 0;padding:20px;display:flex}.img-placeholder .ph-icon{color:var(--line-strong);font-size:20px}.img-placeholder .ph-label{text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);font-family:IBM Plex Mono,monospace;font-size:10.5px}.img-placeholder .ph-sub{max-width:360px;color:var(--ink-faint);font-size:11px}.img-desc{color:var(--ink-faint);text-align:center;margin-top:8px;margin-bottom:18px;font-size:11.5px;font-style:italic}.flow-steps{counter-reset:flow;margin:0;list-style:none}.flow-steps li{counter-increment:flow;border-bottom:1px solid var(--line);padding:14px 0 14px 42px;font-family:IBM Plex Mono,monospace;font-size:13px;position:relative}.flow-steps li:last-child{border-bottom:none}.flow-steps li:before{content:counter(flow);border:1px solid var(--accent);width:24px;height:24px;color:var(--accent);border-radius:50%;justify-content:center;align-items:center;font-size:11px;display:flex;position:absolute;top:12px;left:0}.stat-grid{grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0 30px;display:grid}@media (width<=560px){.stat-grid{grid-template-columns:1fr}}.stat-card{border:1px solid var(--line);text-align:center;background:var(--panel);padding:22px 16px}.stat-card .v{color:var(--accent);font-family:"Source Serif 4",serif;font-size:26px;font-weight:700}.stat-card .l{text-transform:uppercase;letter-spacing:.07em;color:var(--ink-faint);margin-top:6px;font-size:10.5px}.page-footer-nav{border-top:1px solid var(--line);background:var(--panel);z-index:10;flex-shrink:0;justify-content:space-between;align-items:center;padding:18px 48px;display:flex;position:sticky;bottom:0}.nav-btn{text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);border:1px solid var(--line-strong);cursor:pointer;background:0 0;padding:10px 18px;font-family:IBM Plex Mono,monospace;font-size:12.5px;transition:all .15s}.nav-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.nav-btn:disabled{opacity:.3;cursor:default}.page-progress{color:var(--ink-faint);font-family:IBM Plex Mono,monospace;font-size:12px}.page-progress strong{color:var(--ink)}.ev-calculator{width:100%;max-width:620px}.ev-panel{border:1px solid var(--line);background:var(--panel);width:100%;margin-bottom:20px;padding:24px 26px}.ev-panel-title{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:18px;font-family:IBM Plex Mono,monospace;font-size:11.5px}.ev-grid-2{grid-template-columns:1fr 1fr;gap:14px;display:grid}@media (width<=520px){.ev-grid-2{grid-template-columns:1fr}}.ev-input-group{margin-bottom:16px}.ev-input-header{color:var(--ink-faint);justify-content:space-between;margin-bottom:6px;font-family:IBM Plex Mono,monospace;font-size:12px;display:flex}.ev-input-header .ev-val{color:var(--accent);font-weight:600}.ev-panel input[type=number]{background:var(--paper);border:1px solid var(--line-strong);width:100%;color:var(--ink);outline:none;padding:9px 12px;font-family:IBM Plex Mono,monospace;font-size:13.5px}.ev-panel input[type=number]:focus{border-color:var(--accent)}.ev-panel input[type=range]{appearance:none;background:var(--line-strong);outline:none;width:100%;height:4px;margin-top:6px}.ev-panel input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--accent);cursor:pointer;border-radius:50%;width:16px;height:16px}.ev-panel input[type=range]::-moz-range-thumb{background:var(--accent);cursor:pointer;border:none;border-radius:50%;width:16px;height:16px}.ev-panel input[type=range]:disabled{opacity:1}.ev-panel input[type=range]:disabled::-webkit-slider-thumb{background:var(--flag);cursor:default}.ev-panel input[type=range]:disabled::-moz-range-thumb{background:var(--flag);cursor:default}.ev-stats{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.ev-stat-row{color:var(--ink-soft);justify-content:space-between;margin-bottom:9px;font-size:13px;display:flex}.ev-stat-row .ev-val{font-family:IBM Plex Mono,monospace;font-weight:600}.ev-stat-row .ev-val-danger{color:var(--flag)}.ev-stat-row .ev-val-success{color:var(--accent)}.ev-summary{color:var(--ink-soft);margin-bottom:14px;font-family:IBM Plex Mono,monospace;font-size:13px}.ev-summary .ev-highlight{color:var(--accent);font-weight:600}.ev-chart-container{width:100%;height:340px;margin-top:6px;position:relative}.ps-calculator{background:var(--panel);border:1px solid var(--line);border-radius:8px;margin:20px 0 10px;padding:22px 24px}.ps-row{align-items:center;gap:14px;margin-bottom:14px;display:flex}.ps-row label{min-width:140px;color:var(--ink);font-size:13px;font-weight:500}.ps-row input[type=number]{border:1px solid var(--line);background:var(--paper);border-radius:4px;flex:1;padding:8px 10px;font-family:IBM Plex Mono,monospace;font-size:14px}.ps-row input[type=range]{accent-color:var(--accent);flex:1}.ps-row select{border:1px solid var(--line);background:var(--paper);border-radius:4px;flex:1;padding:8px 10px;font-size:13px}.ps-val{text-align:right;min-width:40px;color:var(--accent);font-size:13px;font-weight:600}.ps-result{border-top:2px solid var(--accent);text-align:center;margin-top:18px;padding-top:16px}.ps-label{text-transform:uppercase;letter-spacing:.07em;color:var(--ink-faint);font-size:11px}.ps-value{color:var(--ink);margin:4px 0 2px;font-family:"Source Serif 4",serif;font-size:28px;font-weight:700}.ps-sub{color:var(--ink-soft);font-size:13px}.mobile-topbar{background:var(--panel);border-bottom:1px solid var(--line);z-index:100;justify-content:space-between;align-items:center;height:50px;padding:0 12px;display:none;position:fixed;top:0;left:0;right:0}.mobile-topbar .mt-brand{letter-spacing:-.01em;padding:6px 10px;font-family:"Source Serif 4",serif;font-size:17px;font-weight:700;line-height:1}.mobile-topbar .mt-brand .brand-n{color:var(--ink)}.mobile-topbar .mt-brand .brand-l{color:var(--accent)}.mobile-topbar .mt-center{text-align:center;white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:13px;font-weight:600;overflow:hidden}.mobile-topbar .mt-toggle{cursor:pointer;background:0 0;border:none;flex-direction:column;gap:4px;padding:8px 10px;display:flex}.mobile-topbar .mt-toggle span{background:var(--ink);border-radius:2px;width:18px;height:2px;transition:transform .2s,opacity .2s;display:block}.mobile-topbar .mt-toggle.open span:first-child{transform:translateY(6px)rotate(45deg)}.mobile-topbar .mt-toggle.open span:nth-child(2){opacity:0}.mobile-topbar .mt-toggle.open span:nth-child(3){transform:translateY(-6px)rotate(-45deg)}.mobile-menu{z-index:90;background:var(--paper);flex-direction:column;padding-top:50px;display:none;position:fixed;inset:0}.mobile-menu.open{display:flex}.mobile-menu-body{flex:1;padding:12px 0 40px;overflow-y:auto}.mm-group-label{text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);padding:20px 20px 6px;font-family:IBM Plex Mono,monospace;font-size:10.5px}@media (width<=860px){.mobile-topbar{display:flex}.sidebar{display:none}.main{padding-top:50px}.content-scroll{padding:24px 20px 90px}.page-footer-nav{padding:12px 16px}.cover-meta{grid-template-columns:1fr 1fr;justify-items:center;gap:20px;max-width:320px;margin-left:auto;margin-right:auto;display:grid}.cover-stat{text-align:center;width:100%}.lightbox-close{font-size:40px;top:12px;right:12px}.lightbox-content{max-width:95vw;max-height:85vh}}.session-tracker{background:var(--panel);border:1px solid var(--line);border-radius:8px;margin:20px 0 10px;padding:22px 24px}.st-canvas{margin-bottom:20px}.st-timeline{background:var(--paper);border:1px solid var(--line);border-radius:6px;height:36px;margin-bottom:2px;position:relative;overflow:hidden}.st-block{letter-spacing:.03em;color:#1c1c1a;text-align:center;white-space:nowrap;justify-content:center;align-items:center;font-family:IBM Plex Mono,monospace;font-size:9.5px;line-height:1.2;display:flex;position:absolute;top:0;bottom:0}.st-axis{color:var(--ink-soft);justify-content:space-between;padding-top:4px;font-family:IBM Plex Mono,monospace;font-size:11px;display:flex}.st-tokyo{background:#e8dcc8}.st-london{background:#c8d8e0}.st-newyork{background:#c8e0d0}.st-converted{border-top:1px solid var(--line);margin-bottom:10px;padding:14px 0 10px}.st-conv-label{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:10px;font-family:IBM Plex Mono,monospace;font-size:10.5px}.st-conv-row{color:var(--ink-soft);align-items:center;gap:12px;padding:4px 0;font-size:12.5px;display:flex}.st-conv-row .st-conv-name{min-width:60px;color:var(--ink);font-weight:600}.st-conv-row .st-conv-range{font-family:IBM Plex Mono,monospace;font-size:12px}.st-conv-row .st-conv-label-tag{color:var(--ink-faint);margin-left:auto;font-family:IBM Plex Mono,monospace;font-size:10px}.st-now{background:var(--flag);z-index:5;pointer-events:none;width:2px;transition:left 30s linear;position:absolute;top:0;bottom:0}.st-now:after{content:"";background:var(--flag);border-radius:50%;width:8px;height:8px;position:absolute;top:-3px;left:-3px}.st-details{flex-direction:column;gap:6px;display:flex}.st-header{align-items:center;gap:12px;padding:4px 12px 8px;font-size:13px;display:flex}.st-row{border:1px solid var(--line);border-radius:6px;align-items:center;gap:12px;padding:10px 12px;font-size:13px;display:flex}.st-indicator{background:var(--ink-faint);border-radius:50%;flex-shrink:0;width:10px;height:10px;transition:background 1s}.st-indicator.open{background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.st-name{min-width:60px;font-weight:600}.st-local{color:var(--ink-soft);min-width:100px;font-family:IBM Plex Mono,monospace;font-size:12px}.st-status{text-transform:uppercase;letter-spacing:.06em;margin-left:auto;font-family:IBM Plex Mono,monospace;font-size:11px}.st-status.open{color:var(--accent)}.st-status.closed{color:var(--ink-faint)}.st-footnote{color:var(--ink-faint);text-align:center;margin-top:14px;font-family:"Source Serif 4",serif;font-size:12px;font-style:italic}@media (width<=480px){.st-block{font-size:7px}.st-row{flex-wrap:wrap;gap:6px}.st-name,.st-local{min-width:auto}.st-status{margin-left:0}}