@font-face{font-family:Inter;src:url('assets/fonts/Inter-latin.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{--bg:#f6f8fc;--surface:#fff;--text:#0f172a;--muted:#627188;--border:#dce3ec;--accent:#108981;--action:#0b756e;--soft:#eaf7f4;--accent-text:#096e67;color-scheme:light}
:root[data-ecv-mode=dark]{--bg:#0b1423;--surface:#142033;--text:#eaf1fa;--muted:#a9b9ca;--border:#31435b;--soft:#193b3a;--accent-text:#76ded2;color-scheme:dark}
*{box-sizing:border-box}body.ecv-ui{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif;font-size:14px;font-weight:400;line-height:1.55}h1,h2,h3,strong,button{font-weight:600}h1,h2,h3,p{margin:0}h1{font-size:30px;line-height:1.25}h2{font-size:17px}h3{font-size:15px}button,select{font:inherit}button{min-height:44px;padding:9px 14px;border:1px solid var(--border);border-radius:9px;background:var(--surface);color:var(--text);cursor:pointer;font-weight:600}button:hover{border-color:var(--accent)}button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}[hidden]{display:none!important}.primary{background:var(--action);border-color:var(--action);color:white}.primary:hover{background:#08635d}.topbar{height:84px;padding:0 32px;display:flex;align-items:center;gap:24px;border-bottom:1px solid var(--border);background:var(--surface)}.brand{display:flex;align-items:center}.brand-media{display:block;position:relative;width:200px;height:36px;overflow:hidden}.logo-light{position:absolute;width:246px;height:246px;max-width:none;left:-23px;top:-105px}.logo-dark{display:none;width:200px;height:auto}[data-ecv-mode=dark] .logo-light{display:none}[data-ecv-mode=dark] .logo-dark{display:block}.product{display:flex;flex-direction:column;border-left:1px solid var(--border);padding-left:24px}.product strong{font-size:18px}.product span,.small-note,.hero-progress small{font-size:12px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:16px}.local-badge{color:var(--accent-text);background:var(--soft);padding:5px 10px;border-radius:20px;font-size:12px}main{max-width:1580px;margin:auto;padding:26px 32px}.hero{display:flex;justify-content:space-between;gap:28px;align-items:center;margin-bottom:24px}.eyebrow{font-size:11px;letter-spacing:1px;color:var(--accent-text);font-weight:600;margin-bottom:8px}#lab-subtitle{color:var(--muted);margin-top:8px}.hero-actions{display:flex;gap:10px;margin-top:16px}.hero-progress{min-width:230px;display:flex;flex-direction:column;gap:8px;font-size:13px}progress{appearance:none;width:100%;height:7px;border:0;border-radius:8px;overflow:hidden;background:var(--border)}progress::-webkit-progress-bar{background:var(--border)}progress::-webkit-progress-value{background:var(--accent)}.workspace{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(340px,1fr);gap:24px;align-items:start}.left,.right{min-width:0}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px}.panel-heading{display:flex;justify-content:space-between;gap:10px;align-items:center}.panel-number{display:inline-flex;align-items:center;justify-content:center;width:25px;height:25px;font-size:12px;color:var(--accent-text);background:var(--soft);border-radius:7px;margin-right:7px}.network{display:flex;justify-content:center;align-items:center;padding:18px 20px 10px}.node{width:150px;flex-shrink:0;display:flex;align-items:center;flex-direction:column;gap:8px;border-color:transparent;background:transparent;padding:10px}.node[aria-pressed=true]{background:var(--soft);border-color:var(--accent)}.node img,.node svg{width:68px;height:68px}.node-name{font-size:13px}.link{height:2px;position:relative;flex:1;max-width:180px;background:var(--accent);min-width:40px}.link span{position:absolute;left:50%;bottom:8px;transform:translateX(-50%);white-space:nowrap;color:var(--accent-text);font-size:12px}.device-info{text-align:center;font-size:12px;color:var(--muted)}.console-shell{margin-top:18px;border-radius:12px;overflow:hidden;background:#080c10}.console-bar{background:#1b2530;color:#e6edf3;padding:13px 18px;display:flex;justify-content:space-between;align-items:center;gap:10px}.console-bar h2{font-size:14px}.console-bar span{font-size:12px;color:#c0cbd7}.terminal{height:410px;overflow:auto;padding:20px;color:#fff;background:#080c10;font:14px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace;cursor:text}.terminal pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:0 0 12px;font:inherit}.terminal form{display:flex;align-items:baseline;gap:8px}.terminal label{white-space:nowrap;color:#fff}.terminal input,.terminal input:hover,.terminal input:focus,.terminal input:focus-visible{font:inherit;color:#fff;caret-color:#fff;min-width:0;width:100%;padding:0;margin:0;background:transparent;border:0!important;outline:none!important;box-shadow:none!important;border-radius:0;text-decoration:none!important;appearance:none}.keyboard-help{font-size:11px;color:var(--muted);margin:10px 0 14px}kbd{font:inherit;font-weight:600}.context-guide{border-left:3px solid var(--accent);padding:4px 14px;font-size:12px}.context-guide>span{color:var(--muted);margin-right:7px}.context-guide p{color:var(--muted);margin-top:3px}.pc-panel{padding:50px 25px;min-height:410px;color:#eef3f8}.pc-panel p{margin:12px 0 20px}.route{padding:16px;margin-bottom:16px}.route h2{font-size:14px}#lab-route{display:grid;gap:8px;margin-top:12px}.route-item{text-align:left;font-size:13px;display:flex;justify-content:space-between;gap:10px}.route-item small{font-size:11px;font-weight:400;color:var(--muted)}.route-item[aria-current=step]{border-color:var(--accent);background:var(--soft);color:var(--accent-text)}.mission>p{margin-top:12px;color:var(--muted)}.target-info{display:grid;grid-template-columns:auto 1fr;gap:5px 14px;font-size:12px;border-top:1px solid var(--border);padding-top:12px;margin:14px 0}.target-info dt{color:var(--muted)}.target-info dd{margin:0;text-align:right;overflow-wrap:anywhere}.next-step{padding:16px;background:var(--soft);border-radius:10px;border-left:3px solid var(--accent);margin:16px 0}.next-step h3{color:var(--accent-text);margin-bottom:8px}.next-step p{font-size:13px}.next-step .observe{font-size:12px;color:var(--muted);margin:10px 0}.next-step button{min-height:40px;font-size:12px}.steps-title{margin:18px 0 12px}#objectives{list-style:none;padding:0;margin:0;display:grid;gap:14px}#objectives li{display:flex;gap:10px;font-size:12px}.objective-mark{width:23px;height:23px;flex:0 0 23px;border:1px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:11px}.done .objective-mark{background:var(--soft);color:var(--accent-text);border-color:var(--accent)}#objectives strong{font-size:12px;display:block}#objectives small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.condition{border-top:1px solid var(--border);padding-top:12px}details{font-size:13px}summary{cursor:pointer;min-height:44px;padding:11px 0;color:var(--accent-text);font-weight:600}#hint{margin-top:16px;border-top:1px solid var(--border)}#hint p{padding:0 0 14px;color:var(--muted)}#check{width:100%;margin-top:10px;min-height:46px}#result:not(:empty){font-size:13px;padding:12px;margin-top:12px;background:var(--soft);border-radius:8px;color:var(--accent-text)}#result.incomplete{color:var(--text)}#next-lab{width:100%;margin-top:10px}.mission .persistence{font-size:11px;margin:14px 0 8px}.reset{font-size:12px;background:transparent;border:0;text-decoration:underline;padding-left:0;color:var(--muted)}.scope{margin-top:26px;border-top:1px solid var(--border);color:var(--muted)}.scope p{margin-bottom:10px}.warning{color:#a05200!important}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}dialog{border:1px solid var(--border);border-radius:16px;background:var(--surface);color:var(--text);width:min(620px,calc(100% - 32px));max-height:90vh;padding:28px;font:inherit}dialog::backdrop{background:#07182799}dialog h2{font-size:24px;margin-bottom:12px}dialog p{color:var(--muted)}.dialog-heading{display:flex;justify-content:space-between;align-items:center}.dialog-close{font-size:24px;border:0}.instruction-steps,.how-list{padding-left:24px;margin:20px 0}.instruction-steps li,.how-list li{padding-left:6px;margin-bottom:16px}.instruction-steps p,.how-list p{margin-top:4px;font-size:13px}.dialog-note{font-size:12px;margin:14px 0}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}

@media(max-width:980px){.topbar{height:68px;padding:0 20px;gap:16px}.product{padding-left:16px}.product span{font-size:10px}.brand-media{width:150px;height:30px}.logo-light{width:185px;height:185px;left:-17px;top:-78px}.logo-dark{width:150px}.local-badge{display:none}main{padding:22px 20px}.workspace{grid-template-columns:minmax(0,1.35fr) minmax(300px,1fr);gap:16px}.node{width:110px}.network{padding-left:0;padding-right:0}.card{padding:16px}.hero-progress{min-width:190px}.terminal{font-size:12px}}
@media(max-width:720px){.topbar{gap:12px;padding:0 16px}.product{border:0;padding:0}.product strong{font-size:14px}.product span{display:none}.top-actions{gap:0}.top-actions button{font-size:11px;padding:7px;min-height:40px}.brand-media{width:115px;height:25px}.logo-light{width:142px;height:142px;left:-13px;top:-60px}.logo-dark{width:115px}.hero{display:block}.hero-progress{margin-top:20px}.hero-progress small{display:none}h1{font-size:26px}.workspace{display:flex;flex-direction:column;gap:20px}.left,.right{width:100%}main{padding:20px 16px}.terminal{height:350px;padding:16px;font-size:12px}.console-bar{padding:12px}.console-bar h2{font-size:12px}.console-bar span{font-size:10px}.node{width:110px}.node img,.node svg{width:58px;height:58px}.small-note{font-size:10px}.keyboard-help{line-height:1.9}.mission{padding:18px}.target-info{font-size:12px}.hero-actions button{flex:1}.panel-heading h2{font-size:15px}dialog{padding:20px}.route-item{min-height:48px}}

.node svg{color:var(--accent-text)}.mobile-guidance{display:none}@media(max-width:720px){.mobile-guidance{display:block;background:var(--soft);border-left:3px solid var(--accent);padding:14px;margin-bottom:20px;font-size:13px}.mobile-guidance p{margin:6px 0}.mobile-guidance a{display:inline-flex;align-items:center;min-height:40px;color:var(--accent-text);font-weight:600}}

/* Endpoint labels stay anchored to each end of the data-model link. */
.link span.endpoint-from{left:4px;transform:none;bottom:7px}
.link span.endpoint-to{left:auto;right:4px;transform:none;bottom:7px}
.link span.endpoint-name{left:50%;bottom:auto;top:7px;transform:translateX(-50%);font-size:11px;color:var(--muted)}
.console-hint{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:0 14px;margin-bottom:14px}
#hint.console-hint{margin-top:12px}.console-hint p{font-size:13px}
#xp-result{font-size:13px;color:var(--accent-text);margin-top:12px}.xp-scope{font-size:11px;color:var(--muted);margin-top:8px}
@media(max-width:980px){#xp-total{display:inline-block;font-size:10px;padding:3px 5px}.top-actions{gap:5px}}
@media(max-width:720px){.topbar{flex-wrap:wrap;height:auto;min-height:68px;padding-top:8px;padding-bottom:8px}.top-actions{margin-left:auto}.network .node{width:94px}.link{min-width:72px}.link span{font-size:11px}}
/* Keep CLI useful while reducing travel to the hint on shorter viewports. */
.terminal{height:clamp(220px,calc(100vh - 500px),410px);height:clamp(220px,calc(100dvh - 500px),410px)}
.pc-panel{min-height:clamp(220px,calc(100vh - 500px),410px);min-height:clamp(220px,calc(100dvh - 500px),410px)}
@media(max-width:720px){.terminal{height:clamp(180px,38vh,320px);height:clamp(180px,38dvh,320px)}.pc-panel{min-height:clamp(180px,38vh,320px);min-height:clamp(180px,38dvh,320px)}}

.extended-network .node{width:112px}.extended-network .link{min-width:76px}.extended-network .node small{font-size:11px;color:var(--muted)}
@media(max-width:720px){.extended-network{flex-direction:column;gap:0}.extended-network .node{width:170px}.extended-network .link{height:58px;width:2px;min-width:2px;flex:none}.extended-network .link .endpoint-from{left:10px;top:0;bottom:auto}.extended-network .link .endpoint-to{left:10px;right:auto;top:auto;bottom:0}.extended-network .link .endpoint-name{left:-12px;top:19px;transform:translateX(-100%)}}

/* Secondary, optional reference notes; native details retains keyboard semantics. */
.more-info{margin-top:16px;border-top:1px solid var(--border);font-size:12px;line-height:1.6;overflow-wrap:anywhere}
.more-info summary{min-height:44px;box-sizing:border-box;color:var(--muted);font-weight:400;padding:12px 0;cursor:pointer}
.more-info p{margin:0 0 12px;color:var(--text)}
.more-info a{color:var(--accent-text);text-underline-offset:3px}
.more-info code{font-size:inherit}


.connection-panel{margin-top:16px;border:2px solid var(--accent);background:var(--soft)}.connection-panel h3{color:var(--accent-text)}.connection-panel p{margin:8px 0}.connection-panel button{display:block;width:100%;min-height:52px;margin:12px 0;font-size:16px}.connection-panel pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;font-size:13px;line-height:1.6;margin:10px 0 0}.connection-panel button:disabled{opacity:.6;cursor:not-allowed}

/* Keep simulation output inside its card, including long tokens and narrow views. */
#connection-panel{min-width:0;max-width:100%;overflow-wrap:anywhere}
#connection-result{display:block;min-width:0;width:100%;max-width:100%;box-sizing:border-box;white-space:pre-wrap;overflow-wrap:anywhere;word-break:normal}

/* Shared visual language; account controls await classroom authentication. */
.top-actions{gap:18px;flex-shrink:0}
.top-actions #xp-total{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;border:1px solid var(--border);border-radius:999px;background:var(--soft);color:var(--text);padding:9px 14px;font-size:14px;font-weight:600}
.top-actions #xp-total::before{content:"✦";font-size:18px}
.top-actions #theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;min-height:46px;padding:0;border-radius:10px;font-size:0;flex-shrink:0}
.top-actions #theme-toggle::before{content:"";width:23px;height:23px;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20.9 13A9 9 0 0 1 11 3.1 9 9 0 1 0 20.9 13Z' fill='none' stroke='black' stroke-width='1.8' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}
[data-ecv-mode=dark] .top-actions #theme-toggle::before{mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cg fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='4'/%3E%3Cpath d='M12 2v2m0 16v2M2 12h2m16 0h2M5 5l1.5 1.5m11 11L19 19M5 19l1.5-1.5m11-11L19 5'/%3E%3C/g%3E%3C/svg%3E") center/contain no-repeat}
.back-to-classroom{display:inline-flex;align-items:center;gap:9px;min-height:46px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap}
.back-to-classroom:hover{color:var(--text)}
@media(max-width:1100px){.topbar{height:auto;min-height:84px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px;gap:14px}.top-actions{gap:12px}}
@media(max-width:600px){.top-actions{width:100%;justify-content:flex-end;gap:12px}.top-actions #xp-total{font-size:12px;padding:8px 10px;margin-right:auto}.back-to-classroom{font-size:13px}}

/* Catalog and practice share the existing visual system. */
.catalog-hero{display:grid;grid-template-columns:1.45fr 1fr;gap:36px;padding:32px;margin-bottom:24px}.catalog-intro{color:var(--muted);margin:16px 0;max-width:650px}.catalog-stats{display:flex;flex-wrap:wrap;gap:24px;border-top:1px solid var(--border);margin-top:24px;padding-top:16px;color:var(--muted)}.catalog-stats strong{font-size:24px;color:var(--text);margin-right:6px}.catalog-visual{background:var(--soft);border:1px solid var(--border);border-radius:12px;padding:24px;color:var(--accent-text);align-self:stretch;display:flex;flex-direction:column;justify-content:center;gap:14px}.catalog-flow{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:22px;font-weight:600}.catalog-visual small{color:var(--muted)}.catalog-help{margin-bottom:24px;padding:10px 20px}.catalog-help p{padding-bottom:12px;color:var(--muted)}.catalog-heading{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:16px}.catalog-heading p{color:var(--muted);font-size:12px}#lab-route.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:0}.catalog-grid .route-item{min-width:0;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:12px;padding:22px;background:var(--surface);border-radius:14px;font-size:16px;overflow-wrap:anywhere}.catalog-grid .route-item:hover{background:var(--soft)}.catalog-grid .catalog-number{color:var(--accent-text);font-size:12px;letter-spacing:1px}.catalog-grid .catalog-objective{font-size:13px;color:var(--muted);font-weight:400;flex:1}.catalog-grid .catalog-status{background:var(--soft);color:var(--accent-text);padding:4px 9px;border-radius:20px;font-size:12px}.catalog-grid .catalog-enter{color:var(--accent-text);font-size:13px;margin-top:4px}.catalog-upcoming{margin-top:28px;border-style:dashed}.catalog-upcoming p:last-child{margin-top:8px;color:var(--muted)}.back-labs{margin-bottom:24px;color:var(--accent-text)}
@media(max-width:980px){.catalog-hero{grid-template-columns:1fr;padding:24px;gap:24px}#lab-route.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.catalog-hero{padding:20px}.catalog-visual{padding:18px}.catalog-flow{font-size:18px}#lab-route.catalog-grid{grid-template-columns:1fr;gap:14px}.catalog-grid .route-item{padding:20px}.catalog-stats{gap:16px}.back-labs{width:100%;text-align:left}}