:root{--bg:#f2f5f4;--ink:#183338;--muted:#5d7276;--line:#d8e3df;--green:#00745a;--mint:#e4f4eb;--navy:#133943;--amber:#9a601b}*{box-sizing:border-box}body{margin:0;font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--ink)}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #c9892d;outline-offset:4px}a{color:var(--green);text-underline-offset:3px}main{max-width:1220px;margin:auto;padding:34px 30px 30px}.eyebrow{font-size:11px;font-weight:750;letter-spacing:.15em;text-transform:uppercase;color:var(--green);margin:0 0 9px}header{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-bottom:23px}h1{font-size:clamp(27px,3vw,37px);line-height:1.15;letter-spacing:-.035em;margin:0 0 10px}header p{margin:0;color:var(--muted);font-size:15px}.mode{display:flex;background:#e3eae6;border-radius:10px;padding:4px;flex-shrink:0}.mode button{border:0;border-radius:7px;background:transparent;color:var(--muted);padding:9px 19px;font-size:14px}.mode button[aria-pressed=true]{background:var(--navy);color:white;box-shadow:0 2px 5px #17333815}.prep{display:flex;align-items:center;gap:13px;background:var(--mint);border:1px solid #c9e4d5;border-radius:10px;padding:13px 18px;font-size:14px}.prep svg{width:24px;height:24px;flex-shrink:0;color:var(--green)}.prep p{margin:0}.prep strong{color:#006249}.canvas-card{margin-top:18px;background:white;border:1px solid var(--line);border-radius:15px;overflow:hidden;box-shadow:0 5px 18px #21462e05}.canvas-top{padding:17px 24px 10px;display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:12px}.canvas-top b{font-size:13px}.canvas-top p{margin:0;color:var(--muted)}.phase{color:var(--green);font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap;background:var(--mint);border-radius:20px;padding:4px 10px}.diagram{position:relative;padding:0 14px}.diagram svg{display:block;width:100%;height:auto;overflow:visible}.actor-box{fill:#f7f9f8;stroke:#dce6e0;stroke-width:1.5;transition:fill .2s,stroke .2s}.actor.involved .actor-box{fill:#ebf8f0;stroke:#71b69c;stroke-width:2}.actor.main .actor-box{fill:#e0f3e8;stroke:#00745a;stroke-width:2}.actor-title{fill:var(--ink);font-size:15px;font-weight:700}.actor-sub{fill:var(--muted);font-size:11px}.actor-icon{fill:none;stroke:#58776f;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.actor.involved .actor-icon{stroke:var(--green)}.key-mark{fill:#fff2d9;stroke:#e1c48d}.key-text{font-size:10px;fill:#775114;font-weight:600}.key-symbol{fill:none;stroke:#98601c;stroke-width:1.4;stroke-linecap:round}.wire{fill:none;stroke:#15936b;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.wire.return{stroke:#466d8a;stroke-dasharray:7 5}.packet{fill:#006f50;stroke:#fff;stroke-width:3}.flow-note{fill:#647c78;font-size:11px}.mobile-route{display:none}.message{margin:0 24px 20px;border:1px solid #cbe5d7;border-radius:9px;display:grid;grid-template-columns:155px 1fr;overflow:hidden;font-size:14px}.message-label{background:#eaf5ef;padding:13px 16px;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--green);font-weight:750;display:flex;align-items:center}.message-value{padding:12px 18px;min-width:0}.message-value strong{display:block;font-size:16px;font-weight:650}.message-value span{font-size:12px;color:var(--muted)}.step-card{display:grid;grid-template-columns:76px minmax(0,1fr) 248px;gap:20px;align-items:start;margin-top:18px;padding:23px;background:white;border:1px solid var(--line);border-radius:13px;min-height:182px}.step-number{font-size:43px;font-weight:700;letter-spacing:-.05em;line-height:1.1;color:var(--green)}.step-number small{display:block;color:var(--muted);font-size:11px;letter-spacing:0;font-weight:500;margin-top:8px}h2{font-size:23px;letter-spacing:-.025em;line-height:1.3;margin:0 0 8px}.step-copy p{margin:0;font-size:15px;max-width:670px}.meaning{font-size:13px;line-height:1.65;border-left:1px solid var(--line);padding-left:20px;color:var(--muted)}.meaning b{display:block;font-size:11px;letter-spacing:.05em;text-transform:uppercase;margin-bottom:5px;color:var(--green)}.controls{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:17px 0 9px}.control-pair{display:flex;gap:9px}.btn{background:white;border:1px solid var(--line);padding:9px 17px;border-radius:8px;font-size:13px;color:var(--ink)}.btn.next{background:var(--green);border-color:var(--green);color:white}.btn:disabled{opacity:.38;cursor:default}.progress{display:flex;gap:7px}.progress button{width:32px;height:32px;padding:0;background:#e2eae5;border:1px solid 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0}code{font-size:11px;overflow-wrap:anywhere}.bottom-line{margin-top:22px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;border-top:1px solid var(--line);padding-top:18px;font-size:12px;color:var(--muted)}.bottom-line b{display:block;color:var(--ink);font-size:13px;margin-bottom:3px}.screen-only{display:initial}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:950px){main{padding:25px 20px}.step-card{grid-template-columns:60px minmax(0,1fr);min-height:0}.meaning{grid-column:2;border-left:0;border-top:1px solid var(--line);padding:12px 0 0}.meaning b{display:inline;margin-right:8px}.canvas-top{align-items:flex-start}.actor-title{font-size:15px}.bottom-line{gap:16px}}@media(max-width:650px){main{padding:21px 14px}header{display:block}.mode{display:inline-flex;margin-top:16px}.prep{font-size:13px;padding:12px}.canvas-top{padding:14px 15px;gap:10px}.canvas-top p{font-size:11px}.phase{font-size:9px;padding:4px 7px}.diagram{display:none}.mobile-route{display:block;padding:8px 18px 21px}.mobile-actors{display:flex;flex-wrap:wrap;gap:7px}.mobile-actors span{font-size:11px;background:#f3f6f4;border:1px solid var(--line);border-radius:6px;padding:6px 8px;color:var(--muted)}.mobile-actors span.involved{background:var(--mint);border-color:#79b89a;color:#00664b}.mobile-path{font-size:17px;font-weight:650;color:var(--green);margin:16px 0 0;line-height:1.8}.mobile-note{font-size:11px;color:var(--muted);margin:3px 0 0}.message{margin:0 14px 14px;display:block}.message-label{padding:8px 12px}.message-value{padding:10px 12px}.message-value strong{font-size:15px}.step-card{padding:18px;grid-template-columns:39px 1fr;gap:13px}.step-number{font-size:32px}.step-number small{font-size:10px}h2{font-size:21px}.step-copy p{font-size:14px}.controls{flex-wrap:wrap;justify-content:center}.control-pair{order:2;width:100%;justify-content:center}.btn{min-width:125px}.route-summary{display:none}.overview{grid-template-columns:1fr}.bottom-line{grid-template-columns:1fr;gap:13px}.footnote{font-size:11px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}@media print{@page{size:A4;margin:15mm}body{background:white;font-size:10pt}main{padding:0;max-width:none}.mode,.controls,.route-summary,.footnote,.step-card,.message,.diagram,.mobile-route,.canvas-card{display:none!important}h1{font-size:24pt}header p{font-size:11pt}.prep{font-size:10pt}.all-steps{border:0}.all-steps>summary{display:none}.all-steps>.overview{display:grid!important;grid-template-columns:1fr}.overview article{break-inside:avoid;font-size:10pt}.overview h3{font-size:11pt}.bottom-line{font-size:9pt}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}
.deck-return{margin:0 0 19px;font-size:13px}.deck-return a{display:inline-block;text-decoration:none;border-bottom:1px solid #a5c6b7;padding-bottom:3px}.deck-return a:hover{color:#004e39}@media print{.deck-return{display:none}}

#T12 .contact-cta{display:inline-flex;align-items:center;gap:20px;padding:10px 16px;border-radius:6px;background:#06b6d4;color:#0c2033;font-weight:650;line-height:1.35;text-decoration:none}
#T12 .contact-cta:hover{background:#67e8f9}
#T12 .contact-cta span{font-size:22px;line-height:1}
#T13 .eyebrow{color:#06b6d4}
#T13 .slide-body{align-items:center}
:is(#T13,#contact-dialog) .contact-sheet{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.45fr);font-style:normal;min-width:0;width:100%;min-height:330px;border:1px solid #dbe5ea;border-radius:16px;background:#fff;box-shadow:0 16px 40px #0c203309;overflow:hidden}
:is(#T13,#contact-dialog) .contact-person{position:relative;isolation:isolate;display:flex;flex-direction:column;justify-content:space-between;gap:24px;padding:30px;background:#0c2033;color:#fff;overflow:hidden}
:is(#T13,#contact-dialog) .contact-portrait{display:block;width:160px;height:200px;max-width:100%;object-fit:cover;border-radius:9px;background:#fff}
:is(#T13,#contact-dialog) .contact-logo{display:block;width:190px;max-width:85%;height:auto}
:is(#T13,#contact-dialog) .contact-motif{position:absolute;right:-35px;top:40px;transform:rotate(-14deg);color:#06b6d4;opacity:.1;z-index:-1;pointer-events:none}
:is(#T13,#contact-dialog) .contact-motif .icon{width:280px;height:280px;stroke-width:.7}
:is(#T13,#contact-dialog) .contact-person-name h3{font-size:clamp(27px,2.5vw,38px);font-weight:600;line-height:1.15;letter-spacing:-.035em;margin:0 0 10px}
:is(#T13,#contact-dialog) .contact-person-name p{font-size:16px;line-height:1.4;color:#a8c1d0;margin:0}
:is(#T13,#contact-dialog) .contact-methods{display:flex;flex-direction:column;justify-content:center;min-width:0;padding:20px 34px}
:is(#T13,#contact-dialog) .contact-method{display:grid;grid-template-columns:40px minmax(0,1fr) 18px;gap:17px;align-items:center;padding:30px 0;text-decoration:none;color:#152d40;min-width:0}
:is(#T13,#contact-dialog) .contact-method+.contact-method{border-top:1px solid #dbe5ea}
:is(#T13,#contact-dialog) .contact-symbol{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#06b6d40e;color:#06b6d4}
:is(#T13,#contact-dialog) .contact-symbol .icon{width:25px;height:25px;stroke-width:3}
:is(#T13,#contact-dialog) .contact-method-copy{display:flex;flex-direction:column;gap:10px;min-width:0}
:is(#T13,#contact-dialog) .contact-label{font-size:13px;font-weight:500;line-height:1.3;color:#607381}
:is(#T13,#contact-dialog) .contact-method strong{display:block;line-height:1.2;letter-spacing:-.035em;font-weight:600}
:is(#T13,#contact-dialog) .contact-phone strong{font-size:clamp(29px,3.1vw,48px);white-space:nowrap}
:is(#T13,#contact-dialog) .contact-email strong{font-size:clamp(19px,1.85vw,28px);overflow-wrap:anywhere}
:is(#T13,#contact-dialog) .contact-action{color:#06b6d4;font-size:23px;line-height:1}
:is(#T13,#contact-dialog) .contact-method:hover strong{color:#0089a3}
:is(#T13,#contact-dialog) .contact-method:focus-visible{outline-color:#06b6d4;outline-offset:5px;border-radius:5px}
:is(#T13,#contact-dialog) .contact-company{border-top:1px solid #dbe5ea;padding:18px 0 8px;font-size:13px;line-height:1.5;color:#526a79}
:is(#T13,#contact-dialog) .contact-company-ids{display:flex;flex-wrap:wrap;gap:3px 20px;margin:0 0 12px;font-variant-numeric:tabular-nums}
:is(#T13,#contact-dialog) .contact-addresses{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0}
:is(#T13,#contact-dialog) .contact-addresses dt{font-weight:600;color:#152d40;margin-bottom:3px}
:is(#T13,#contact-dialog) .contact-addresses dd{margin:0}
@media screen and (min-width:901px) and (max-height:800px),print{
 :is(#T13,#contact-dialog) .contact-sheet{min-height:300px}
 :is(#T13,#contact-dialog) .contact-person{padding:26px;gap:20px}
 :is(#T13,#contact-dialog) .contact-portrait{width:136px;height:170px}
 :is(#T13,#contact-dialog) .contact-methods{padding:16px 28px}
 :is(#T13,#contact-dialog) .contact-method{padding:25px 0;gap:14px}
}
@media screen and (max-width:900px){
 #T13 .slide-body{align-items:stretch;justify-content:center}
 :is(#T13,#contact-dialog) .contact-sheet{grid-template-columns:1fr;min-height:0}
 :is(#T13,#contact-dialog) .contact-person{display:grid;grid-template-columns:130px minmax(0,1fr);align-items:center;padding:28px;gap:24px}
 :is(#T13,#contact-dialog) .contact-portrait{width:130px;height:162px}
 :is(#T13,#contact-dialog) .contact-motif{top:-12px;right:8px}
 :is(#T13,#contact-dialog) .contact-methods{padding:4px 28px}
 :is(#T13,#contact-dialog) .contact-phone strong{font-size:36px}
 :is(#T13,#contact-dialog) .contact-email strong{font-size:24px}
}
@media screen and (max-width:600px){
 #T12 .contact-cta{font-size:14px;gap:12px}
 :is(#T13,#contact-dialog) .contact-sheet{border-radius:12px}
 :is(#T13,#contact-dialog) .contact-person{grid-template-columns:90px minmax(0,1fr);padding:24px;gap:20px}
 :is(#T13,#contact-dialog) .contact-portrait{width:90px;height:112px}
 :is(#T13,#contact-dialog) .contact-logo{width:170px}
 :is(#T13,#contact-dialog) .contact-motif .icon{width:240px;height:240px}
 :is(#T13,#contact-dialog) .contact-person-name h3{font-size:26px}
 :is(#T13,#contact-dialog) .contact-methods{padding:0 24px}
 :is(#T13,#contact-dialog) .contact-method{grid-template-columns:30px minmax(0,1fr);gap:10px 12px;padding:23px 0}
 :is(#T13,#contact-dialog) .contact-symbol{width:30px;height:30px}
 :is(#T13,#contact-dialog) .contact-symbol .icon{width:20px;height:20px}
 :is(#T13,#contact-dialog) .contact-method-copy{display:contents}
 :is(#T13,#contact-dialog) .contact-label{grid-column:2;grid-row:1}
 :is(#T13,#contact-dialog) .contact-method strong{grid-column:1/-1;grid-row:2}
 :is(#T13,#contact-dialog) .contact-phone strong{font-size:clamp(23px,7.1vw,32px)}
 :is(#T13,#contact-dialog) .contact-email strong{font-size:20px}
 :is(#T13,#contact-dialog) .contact-action{display:none}
 :is(#T13,#contact-dialog) .contact-company{padding:18px 0 22px;font-size:12px}
 :is(#T13,#contact-dialog) .contact-company-ids{gap:3px 14px}
 :is(#T13,#contact-dialog) .contact-addresses{gap:14px}
}
@media screen and (max-width:380px){
 :is(#T13,#contact-dialog) .contact-addresses{grid-template-columns:1fr}
}

/* Persistent contact access on the deck, chapter pages and DESFire walkthrough. */
.topbar{position:sticky;top:0;z-index:35;display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;margin:0;padding:0 32px;background:#0c2033;color:#fff;box-sizing:border-box}
.topbar .brand img{display:block;width:148px;height:auto}
.topbar .top-actions{display:flex;align-items:center;gap:8px}
.topbar .top-actions button,.topbar .top-actions a{font:inherit;font-size:12px;line-height:1.25;border:1px solid #ffffff35;border-radius:5px;padding:8px 12px;background:transparent;color:inherit;text-decoration:none;white-space:nowrap;cursor:pointer}
.topbar .top-actions .contact-trigger{background:#06b6d4;border-color:#06b6d4;color:#0c2033;font-weight:700;font-size:13px;min-height:40px;padding:10px 15px;margin-left:4px}
.topbar .top-actions .contact-trigger:hover{background:#67e8f9;border-color:#67e8f9}
.topbar .contact-trigger:focus-visible{outline:3px solid #fff;outline-offset:3px}
.contact-short-label{display:none}
.reading .slide,.detail-main section[id],.detail-main,.deck-return{scroll-margin-top:80px}
.detail-toc{top:84px}
html.contact-modal-open,html.contact-modal-open body{overflow:hidden;overscroll-behavior:none}
.contact-dialog{width:min(960px,calc(100vw - 40px));max-width:none;max-height:calc(100dvh - 40px);padding:0;border:0;border-radius:18px;background:#fff;color:#152d40;box-shadow:0 24px 90px #07182755;overflow:auto;overscroll-behavior:contain}
.contact-dialog::backdrop{background:#07182799;backdrop-filter:blur(4px)}
.contact-dialog .contact-dialog-head{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0;padding:16px 24px;border-bottom:1px solid #dbe5ea;background:#fff}
.contact-dialog-head h2{margin:0;font-size:23px;font-weight:600;line-height:1.2;letter-spacing:-.025em}
.contact-dialog-head button{display:grid;place-items:center;flex:none;width:40px;height:40px;padding:0;border:1px solid #dbe5ea;border-radius:50%;background:#f4f7f8;color:#152d40;font:28px/1 system-ui,sans-serif;cursor:pointer}
.contact-dialog-head button:hover{background:#e7f7fa;border-color:#06b6d4}
.contact-dialog-head button:focus-visible{outline:3px solid #06b6d4;outline-offset:3px}
#contact-dialog .contact-sheet{border:0;border-radius:0;box-shadow:none;box-sizing:border-box}
#contact-dialog .contact-sheet *{box-sizing:border-box}
@media screen and (max-width:900px){
 .topbar{height:60px;padding:0 20px;gap:12px}
 .reading .slide,.detail-main section[id],.detail-main,.deck-return{scroll-margin-top:76px}
}
@media screen and (max-width:600px){
 .topbar{padding:0 16px}
 .topbar .brand img{width:116px}
 .topbar .top-actions{gap:6px}
 .topbar .top-actions button,.topbar .top-actions a{font-size:11px;padding:8px 9px}
 .topbar .top-actions .contact-trigger{font-size:12px;padding:9px 12px;min-height:40px;margin-left:0}
 .topbar #fullscreen{display:none}
 .contact-long-label{display:none}
 .contact-short-label{display:inline}
 .contact-dialog{width:calc(100vw - 24px);max-height:calc(100dvh - 24px);border-radius:14px}
 .contact-dialog .contact-dialog-head{padding:12px 18px}
 .contact-dialog-head h2{font-size:21px}
 #contact-dialog .contact-methods{padding-bottom:8px}
}
@media print{
 .topbar,.contact-dialog{display:none!important}
}


.term-help{display:inline;vertical-align:baseline;min-height:24px;padding:0;border:0;border-radius:3px;background:none;color:inherit;font:inherit;line-height:inherit;letter-spacing:inherit;text-transform:inherit;text-align:inherit;cursor:help}
.term-word{text-decoration:underline dotted #9bbfae;text-underline-offset:4px;text-decoration-thickness:1px}
.term-info-icon{display:inline-block;width:14px;height:14px;margin-left:3px;vertical-align:-2px;color:#16869a}
.term-help:hover,.term-help[aria-expanded="true"]{color:#087487}
.term-help:focus-visible{outline:2px solid #06B6D4;outline-offset:3px}
.dark .term-info-icon,.crypto-card .term-info-icon{color:#9de4c7}
.dark .term-help:hover,.dark .term-help[aria-expanded="true"],.crypto-card .term-help:hover,.crypto-card .term-help[aria-expanded="true"]{color:#b7f6d9}
.term-popover{position:fixed;z-index:80;width:340px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 100px);overflow:auto;margin:0;padding:17px 20px;border:1px solid #9bbfae;border-radius:12px;background:#f1f8f4;color:#173c30;box-shadow:0 12px 32px #00171140;font:15px/1.5 Inter,system-ui,sans-serif}
.term-popover[hidden]{display:none}
.term-popover strong{display:block;margin:0 0 7px;font-size:16px;line-height:1.3;color:#115339}
.term-popover p{margin:0;color:#36594b}
@media print{.term-popover,.term-info-icon{display:none!important}.term-word{text-decoration:none}.term-help{min-height:0}}


/* The footer remains available in both projection and reading mode. */
.deckbar{position:fixed;left:0;right:0;bottom:0;height:52px;gap:12px;padding:0 180px;box-shadow:0 -1px 12px #0c203307}
.reading .deckbar{display:flex}
.reading{padding-bottom:52px}
.present .slide{height:calc(100dvh - 116px)}
.language-switch{display:flex;align-items:center;gap:5px;position:absolute;right:20px;top:50%;transform:translateY(-50%)}
.language-switch a{display:flex;align-items:center;justify-content:center;width:42px;height:36px;border:1px solid transparent;border-radius:5px;text-decoration:none;transition:background .15s,border-color .15s}
.language-switch a:hover{background:#edf5f1;border-color:#c2d9ce}
.language-switch a[aria-current="true"]{background:#e8f5ee;border-color:#249267;box-shadow:inset 0 -2px #249267}
.language-switch svg{display:block;width:25px;height:17px;border-radius:2px;box-shadow:0 0 0 1px #0c203320}
.version-label{position:absolute;left:24px;font:500 11px/1 system-ui,sans-serif;color:#607381;letter-spacing:.06em}
.language-footer{position:fixed;bottom:0;left:0;right:0;height:52px;background:#fff;border-top:1px solid #d9e3df;z-index:30;display:flex;align-items:center}
body:has(.language-footer){padding-bottom:52px}
.footer-meta{position:absolute;left:24px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.footer-meta .version-label{position:static}
.footer-contacts{display:flex;align-items:center;gap:10px;font:400 12px/1.4 Inter,system-ui,sans-serif;color:#152d40}
.footer-separator{color:#98a8b3}
.footer-contacts a{color:inherit;text-decoration:none;padding:8px 0}
.footer-contacts a:hover{color:#0089a3;text-decoration:underline;text-underline-offset:3px}
.footer-contacts a:focus-visible{outline:2px solid #06b6d4;outline-offset:3px;border-radius:2px}
@media(max-width:1050px){.footer-meta,.footer-contacts{gap:8px}.footer-contacts{font-size:11px}}
@media(max-width:900px){.footer-contacts{display:none}}
@media(max-width:600px){.footer-meta{left:20px}.deckbar .footer-meta{display:none}}
@media(max-width:600px){.deckbar{justify-content:flex-start;padding:0 150px 0 8px;gap:3px}.deckbar button{padding:6px 12px}#counter{min-width:47px}.deckbar .version-label{display:none}.language-switch{right:10px;gap:3px}.language-switch a{width:40px;height:38px}.version-label{left:20px}}
@media print{.deckbar,.language-footer{display:none!important}body,body.reading,body:has(.language-footer){padding-bottom:0}}