.technology-strip{position:relative;z-index:1;display:flex;justify-content:center;flex-wrap:wrap;gap:12px;width:min(1420px,calc(100% - 44px));margin:35px auto 0;padding-top:24px;border-top:1px solid var(--line)}
.technology-strip a{display:flex;align-items:center;gap:9px;padding:9px 13px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink);font-size:11px;transition:transform .2s,border-color .2s}
.technology-strip a:hover{transform:translateY(-3px);border-color:var(--violet)}
.technology-strip img,.hero-flow-icon img{object-fit:contain;background:#fff;border-radius:7px;padding:4px;box-sizing:content-box}
.technology-strip img{width:25px;height:25px}
.hero-flow-icon svg{width:32px;height:32px}.hero-node i svg{width:23px;height:23px}
.hero-node i{width:34px;height:34px;border:1px solid color-mix(in srgb,var(--c) 35%,transparent)}
.topic.study-topic{display:flex;flex-direction:column;gap:12px;padding:13px;cursor:default}
.topic-check{display:flex;align-items:flex-start;gap:9px;cursor:pointer;color:var(--ink);font-size:12px;line-height:1.55}
.topic-check input{flex:none}.topic-resources{display:flex;flex-wrap:wrap;gap:8px 15px;padding-top:9px;border-top:1px solid var(--line)}
.topic-resources a{color:var(--blue);font-size:10px;text-decoration:underline;text-underline-offset:3px}
.topic-resources a:hover{color:var(--ink)}
@media(max-width:560px){.technology-strip{gap:8px}.technology-strip a{padding:7px 10px;font-size:10px}.hero-flow-icon img{width:28px;height:28px}.hero-node i{width:28px;height:28px}}
@media(prefers-reduced-motion:reduce){.technology-strip a{transition:none}.technology-strip a:hover{transform:none}}
/* Fluid reading layout and semantic sequence diagrams. */
.hero-grid{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(20px,4vw,52px)}
.hero-grid>*{min-width:0}.architecture-player{min-width:0;scroll-margin-top:135px;border:1px solid var(--line);border-radius:22px;background:var(--panel);box-shadow:var(--shadow);overflow:hidden}
.player-heading{display:grid;gap:7px;padding:22px;border-bottom:1px solid var(--line)}.player-heading strong{font:700 18px Manrope}
.player-select{display:grid;gap:6px;padding:15px 22px;color:var(--muted);font-size:11px}.player-select select{width:100%;min-width:0;min-height:44px;padding:9px;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink)}
.player-view{min-height:420px;padding:0 22px 20px}.player-view h3{margin:5px 0 10px;font-size:27px}.diagram-kind{font-size:11px;color:var(--muted)}
.sequence-scroll{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--bg)}.sequence-scroll svg{display:block;width:100%;min-width:440px;height:auto;color:var(--muted)}
.actor rect{fill:var(--panel2);stroke:var(--line);stroke-width:1.5}.actor text{fill:var(--ink);font:600 12px Arial,sans-serif}.lifeline{stroke:var(--line);stroke-dasharray:4 5;fill:none}
.message{color:var(--muted)}.message path{fill:none;stroke:currentColor;stroke-width:1.5}.message text{fill:currentColor;font:11px Arial,sans-serif;paint-order:stroke;stroke:var(--bg);stroke-width:5px;stroke-linejoin:round}
.message.current{color:var(--cyan)}.message.current path{stroke-width:3;stroke-dasharray:8 4;animation:arrowDash 1.1s linear infinite}.message.current text{font-weight:700}
@keyframes arrowDash{to{stroke-dashoffset:-24}}
.flow-example{padding:13px;border-left:3px solid var(--violet);background:var(--panel2);color:var(--ink);font-size:12px;line-height:1.6;overflow-wrap:anywhere}
.flow-title-icon{width:26px;height:26px;margin-right:10px;vertical-align:middle;color:var(--blue)}.flow-reference{font-size:12px;color:var(--blue);text-decoration:underline;text-underline-offset:4px}
.flow-steps{padding-left:22px;color:var(--muted);font-size:11px;line-height:1.7}.flow-steps li{padding:3px}.flow-steps .current{color:var(--cyan);font-weight:700}
.player-controls{display:flex;flex-wrap:wrap;gap:9px;padding:14px 22px;border-top:1px solid var(--line)}.player-controls button,.pattern-demo{min-height:44px;padding:9px 14px;border:1px solid var(--line);border-radius:9px;background:var(--panel2);color:var(--ink);font-size:12px}.pattern-demo{align-self:flex-start;color:var(--blue)}
.architecture-timeline{min-height:0!important;padding:0!important;background:transparent;border:0;box-shadow:none}.architecture-timeline .runtime{height:330px;margin:25px 28px}.architecture-timeline .runtime-card{width:90px;min-height:75px}.architecture-timeline .runtime-card.bottom{top:225px}.architecture-timeline .runtime-card strong{color:var(--ink)}.architecture-timeline .timeline-head{flex-wrap:wrap;gap:10px}.architecture-timeline .timeline-caption{flex-wrap:wrap}
.motion-paused *{animation-play-state:paused!important}.chapter-symbol,.module-symbol,.topic-symbol{display:inline-flex;align-items:center;justify-content:center;flex:none;color:var(--blue)}
.chapter-symbol{margin-right:10px;vertical-align:middle}.chapter-symbol svg{width:25px;height:25px}.module-symbol{margin-right:8px;vertical-align:middle}.module-symbol svg{width:18px;height:18px}.topic-symbol svg,.topic-symbol img{width:21px;height:21px;object-fit:contain}.topic-symbol img{background:#fff;border-radius:4px;padding:2px}.topic-check>span:last-child{min-width:0;overflow-wrap:anywhere}.rail svg{width:20px;height:20px}
.part-head,.module summary{min-width:0}.part-head h3,.module-title{overflow-wrap:anywhere}.topics{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}.sources,.capstones{grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr))}.shell{width:min(1420px,calc(100% - 32px))}
@media(max-width:1150px){.hero-grid{grid-template-columns:1fr}.architecture-player{width:100%;max-width:850px}.curriculum-layout{grid-template-columns:180px minmax(0,1fr);gap:20px}}
@media(max-width:800px){.curriculum-layout{display:block}.rail{display:block;position:static;max-height:none!important;padding:0;margin-bottom:22px}.rail nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));gap:5px}.rail a{border:1px solid var(--line);border-radius:8px}.progress-box{margin-bottom:12px}.technology-strip{justify-content:flex-start}.part-head{padding:15px}.part-head h3{font-size:20px}}
@media(max-width:480px){.shell{width:calc(100% - 24px)}.player-heading,.player-select,.player-controls{padding:14px}.player-view{padding:0 10px 14px}.hero h1{font-size:clamp(32px,10vw,44px)}.hero{padding:35px 0}.lead{font-size:15px}.hero-actions .button{width:100%}.architecture-timeline .runtime{margin-inline:25px}.architecture-timeline .runtime-card{width:65px}.architecture-timeline .runtime-card b{font-size:10px}.architecture-timeline .runtime-card strong{font-size:9px}.part-head{grid-template-columns:38px minmax(0,1fr);gap:10px}.module summary{gap:8px;padding:13px}.module-title{font-size:13px}.technology-strip{width:calc(100% - 24px)}.technology-strip a{flex:1 1 120px}.metric{padding:10px}.section{padding:38px 0}}
@media(prefers-reduced-motion:reduce){.message.current path{animation:none}.architecture-player *{scroll-behavior:auto!important}}