/* Shared additions only: the host site's layout, left navigation and palette remain authoritative. */
:focus-visible{outline:3px solid #7aa7d8;outline-offset:3px}
.bf-orientation{font:11px/1.6 'Inter',sans-serif;display:flex;justify-content:space-between;gap:14px;margin:-20px 0 30px;padding:0 0 12px;border-bottom:1px solid var(--line);color:var(--muted)}
.bf-orientation a{color:var(--blue);text-decoration:none}
[hidden]{display:none!important}
.bf-skip{position:fixed;top:8px;left:8px;z-index:99;transform:translateY(-200%);background:var(--dark);color:white;padding:10px 16px}.bf-skip:focus{transform:none}
.bf-eyebrow{font:600 10px/1.6 'Inter',sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
.bf-practice{border:1px solid var(--line);background:var(--blue-bg);border-radius:0;padding:28px;margin:42px 0}
.bf-practice h2{margin-bottom:10px;font-size:21px;text-transform:none}.bf-small{font:12px/1.7 'Inter',sans-serif;color:#666;margin:10px 0 18px}
.bf-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0}
.bf-flow>div{position:relative;padding:16px 12px;background:#fff;border:1px solid var(--line);border-radius:0;min-width:0}
.bf-flow>div:not(:last-child):after{content:'→';position:absolute;right:-15px;top:36%;color:#698b7e;font:16px sans-serif}
.bf-flow span{display:block;font:10px 'Inter',sans-serif;color:var(--teal);margin-bottom:8px}
.bf-flow strong{font:600 13px/1.6 'Inter',sans-serif;display:block}
.bf-case{font-size:16px;line-height:1.7!important;color:var(--dark);margin:24px 0!important}
.bf-quiz fieldset{border:0;padding:0;margin:0}.bf-quiz legend{font:600 15px/1.7 'Inter',sans-serif;margin-bottom:14px}
.bf-option{display:flex;align-items:flex-start;gap:12px;padding:13px 14px;margin:7px 0;border:1px solid var(--line);border-radius:0;background:#fff;font:14px/1.6 'Inter',sans-serif;cursor:pointer}
.bf-option:has(input:checked){border-color:var(--blue);background:var(--blue-bg)}.bf-option input{margin-top:5px;accent-color:var(--teal);flex-shrink:0}
.bf-button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--dark);background:var(--dark);color:#fff!important;border-radius:0;padding:12px 18px;font:500 12px/1.5 'Inter',sans-serif;text-decoration:none;min-height:44px}
.bf-button:hover{background:var(--dark)}.bf-button.secondary{background:transparent;color:var(--dark)!important;border-color:var(--line)}.bf-button:disabled{opacity:.55;cursor:default}
.bf-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.bf-quiz .bf-button{margin-top:12px}
.bf-feedback{font:600 13px/1.7 'Inter',sans-serif;margin:12px 0!important}.bf-feedback:empty{display:none}
.bf-answer{margin:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0}
.bf-answer summary{font:600 13px/1.7 'Inter',sans-serif;color:var(--teal)}.bf-answer p{font-size:16px;padding:14px 0 0}
.bf-evidence{margin:24px 0;padding-left:16px;border-left:3px solid var(--blue)}.bf-evidence h3{font:600 12px/1.7 'Inter',sans-serif;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}.bf-evidence p{font-size:15px}
.bf-note-label{display:block;font:500 13px/1.8 'Inter',sans-serif;color:var(--dark);margin-bottom:12px}
#bf-note,.bf-work-note{display:block;width:100%;resize:vertical;background:#fff;border:1px solid var(--line);border-radius:0;padding:14px;font:15px/1.7 'Inter',sans-serif;color:var(--dark);min-height:125px}
.bf-complete[aria-pressed=true]{background:var(--teal);border-color:var(--teal)}
.bf-scroll{max-width:100%;overflow-x:auto;margin:18px 0;overscroll-behavior-x:contain;border-radius:0}.bf-scroll>div{margin:0!important}
.bf-scroll-hint{font:11px/1.5 'Inter',sans-serif;color:var(--muted);margin:5px 0}
canvas{max-width:100%}svg{max-width:100%}
.bf-chart-description{font:12px/1.6 'Inter',sans-serif;color:var(--muted);margin:8px 0 18px}
.bf-home-tools{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 28px}
.bf-search{width:100%;border:1px solid #aebfb7;border-radius:0;padding:13px 16px;background:#fff;font:14px 'Inter',sans-serif;color:var(--dark);margin:8px 0 14px}.bf-search-label{font:600 12px 'Inter',sans-serif;color:var(--dark)}
.bf-reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.bf-reference-card{border:1px solid var(--line);border-radius:0;padding:18px}.bf-reference-card h3{font:600 14px/1.5 'Inter',sans-serif;margin-bottom:8px}.bf-reference-card p{font-size:15px}.bf-reference-card a{color:var(--teal)}
.bf-data-table{border-collapse:collapse;width:100%;font:13px/1.6 'Inter',sans-serif;margin:20px 0}.bf-data-table th,.bf-data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.bf-data-table th{color:var(--dark);background:var(--blue-bg);font-weight:600}.bf-data-table caption{text-align:left;font:12px/1.6 'Inter',sans-serif;color:var(--muted);margin-bottom:10px}
.bf-stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}.bf-stat{padding:20px;background:var(--blue-bg);border-radius:0}.bf-stat strong{display:block;font-size:29px}.bf-stat span{font:11px/1.6 'Inter',sans-serif}
[hidden]{display:none!important}
@media(max-width:768px){
.bf-practice{padding:18px 14px;margin:30px 0}.bf-practice h2{font-size:20px}.bf-flow{gap:10px}.bf-flow>div{padding:12px 8px}.bf-flow strong{font-size:11px}.bf-flow>div:not(:last-child):after{right:-11px;font-size:12px}
.bf-reference-grid{grid-template-columns:1fr}.bf-stat-row{gap:7px}.bf-stat{padding:12px 8px}.bf-stat strong{font-size:20px}.bf-actions{gap:8px}.bf-actions .bf-button{flex:1 0 100%}.bf-data-table{font-size:11px}.bf-data-table th,.bf-data-table td{padding:9px 7px}.bf-hero{padding:20px}.bf-hero h2{font-size:25px}.bf-orientation{font-size:10px}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{body{background:white;font-size:11pt}.layout{display:block;padding:0}.layout>nav,.divider,.bf-skip,.bf-home-tools,.bf-actions,.bf-quiz .bf-button,.progress-reset{display:none!important}main{padding:0;border:0;max-width:none}.bf-practice,.bf-hero{background:white;color:var(--dark);break-inside:auto}.bf-hero h2,.bf-hero p{color:var(--dark)}.page-name{font-size:26pt}section{margin-bottom:22pt}.bf-flow,.bf-evidence,.bf-data-table tr{break-inside:avoid}.bf-answer>p{display:block}.bf-scroll{overflow:visible}.bf-work-note,#bf-note{min-height:100px}.page-nav{display:none}}

/* Completion augments existing module cards without moving or recoloring site navigation. */
a.module.visited .mod-num::after{content:none}a.module.visited .mod-num{background:var(--teal)}a.module.visited .mod-title{color:var(--dark)}a.module.completed .mod-num{background:var(--dark)}a.module.completed .mod-num::after{content:' ✓'}
.bf-home-start{margin:16px 0 30px}.bf-home-start a{font:12px 'Inter',sans-serif;color:var(--blue)}

main{min-width:0}.section{margin-bottom:42px}.section-title{line-height:1.35}.prose p{margin:0 0 16px}.bf-practice{margin:42px 0}.fr-notes{margin:36px 0}.bf-note-label{margin-top:12px}.fr-source-link{font:12px/1.7 Inter,sans-serif;margin:24px 0}.fr-source-link a,.fr-source a{color:var(--blue)}.fr-source{padding:20px 0;border-bottom:1px solid var(--line)}.fr-source h3{font:600 15px/1.7 Inter,sans-serif}.fr-source p{font-size:15px;margin:6px 0}.fr-source a{font:12px/1.7 Inter,sans-serif;overflow-wrap:anywhere}.calc-input{width:100%;max-width:100%;padding:10px;border:1px solid var(--line);background:#fff;font:13px/1.7 Inter,sans-serif;color:var(--text)}
.cp-control{display:grid;grid-template-columns:minmax(0,2fr) minmax(70px,3fr) 46px;gap:12px;align-items:center;margin:20px 0;font:12px/1.7 Inter,sans-serif}.cp-control input{width:100%;min-width:0;accent-color:var(--teal)}.cp-control output{text-align:right}.bf-button{cursor:pointer}.bf-small{overflow-wrap:anywhere}.fr-bridge{display:grid;gap:10px;margin:20px 0}.fr-bridge>div{display:flex;align-items:center;justify-content:space-between;border-left:3px solid var(--blue);padding:12px;background:var(--blue-bg);font:12px/1.7 Inter,sans-serif;gap:12px}.fr-bridge strong{font-variant-numeric:tabular-nums;white-space:nowrap}.bf-data-table{table-layout:auto}.bf-data-table th{overflow-wrap:normal}.bf-scroll{min-width:0}.bf-feedback{color:var(--teal)}.bf-flow strong{color:var(--dark)}.page-nav a{flex:1;min-width:0;line-height:1.7}.page-nav{gap:14px}nav .nav-section{max-width:140px}nav .nav-section a{font-size:11px;line-height:1.6;margin-top:9px}canvas{width:100%;height:240px!important}[aria-live=polite]{contain:none}.bf-orientation{margin:0 0 24px}.section-label{margin-bottom:12px}.section-title{margin-bottom:16px}.formula{overflow-x:auto;line-height:1.85}.viz-wrap{min-width:0}.bf-search{border-color:var(--line)}.bf-data-table th,.bf-data-table td{font-variant-numeric:tabular-nums}.fr-home-search{margin:0 0 30px}.fr-case-questions>section{margin:24px 0}.fr-case-questions h3{font:600 16px/1.7 Inter,sans-serif;margin-bottom:10px}a.module.completed .mod-num{background:var(--dark);color:#fff}a.module.visited:not(.completed) .mod-num{background:var(--teal);color:#fff}
@media(max-width:768px){.slider-row{flex-wrap:wrap;gap:9px}.slider-label{flex:1 0 100%;min-width:0!important}.slider-row input[type=range]{flex:1;min-width:0}.slider-val{min-width:55px!important}.calc-grid,.three,.results-grid,.totbar{grid-template-columns:1fr!important}.bf-data-table{font-size:12px;min-width:0}.bf-reference-grid{grid-template-columns:1fr}.bf-flow{grid-template-columns:1fr}.bf-flow>div:not(:last-child):after{content:'↓';right:50%;top:auto;bottom:-14px}.cp-control{grid-template-columns:1fr 46px;gap:6px}.cp-control label{grid-column:1/-1}.bf-stat-row{grid-template-columns:1fr}.bf-stat strong{font-size:25px}.bf-practice{padding:20px 16px}.fr-bridge>div{flex-wrap:wrap}.cbar-row,.bar-row{flex-wrap:wrap}.cbar-lbl,.bar-lbl{flex:1 0 100%;text-align:left!important}.cbar-track,.bar-track{flex:1;min-width:0}.factor-row,.desk-row{flex-wrap:wrap;gap:8px}.factor-s{flex:1 0 100%}.lh-cat{min-width:0;overflow-wrap:anywhere}.rr-name,.cls-name{flex-wrap:wrap}.rfet-result,.checks{min-width:0}.bar-flag{white-space:normal!important}.bf-orientation{gap:8px}.bf-scroll{margin:16px 0}.page-title{overflow-wrap:anywhere}.viz-wrap{padding:18px 14px}}
@media(max-width:480px){.sc-grid,.shift-stats,.stats-grid,.stats-row,.scenario-grid,.scenarios{grid-template-columns:1fr!important}.phase:not(:has(a.module)){flex-wrap:wrap}.ph{flex:1 0 28%}.chk{flex-wrap:wrap;gap:8px}.cls-grid,.rr-grid,.rc-grid,.imp-grid{grid-template-columns:1fr}.fail-head{flex-wrap:wrap;gap:8px}.lh-row{flex-wrap:wrap}.lh-cat{flex-basis:100%}.three{display:grid}.bf-data-table th,.bf-data-table td{padding:10px 7px!important}}
/* Keep the content column aligned with the series home; animate colors, not layout. */
.layout>nav{width:150px;flex:0 0 150px}nav .nav-section{max-width:none}.page-nav a{transition:color .2s,border-color .2s;max-width:100%}.cbar-track{overflow:hidden}.formula{font:13px/1.85 Inter,sans-serif;background:#f7f7f7;border:1px solid var(--line);padding:16px;margin:20px 0;max-width:100%;overflow-wrap:anywhere}.fr-binding{background:var(--teal-bg)}
@media(max-width:768px){.layout>nav{width:auto;flex:initial}.bf-orientation{margin-top:0}}
.bf-answer p,.bf-case,.bf-evidence p,.fr-notes{overflow-wrap:anywhere}