:root{--ink:#102f43;--muted:#536978;--blue:#009ded;--primary:#087bab;--line:#dce7ed;--bg:#f3f7fa;--success:#20775b}*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:16px;line-height:1.55;color:var(--ink)}h1,h2,h3,p{margin:0}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer;color:inherit}button:hover{filter:brightness(.96)}button:disabled{cursor:default;opacity:.42}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #42b6eb;outline-offset:4px}a{color:inherit;text-decoration:none}.app-header{background:white;border-bottom:1px solid var(--line);padding:23px max(24px,calc((100vw - 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#becfd9;color:#2d5268}.text-button{border:0;background:transparent;color:#14749b;padding:10px;font-size:15px;font-weight:600}.small-primary{border:0;border-radius:7px;background:var(--primary);color:white;padding:10px 15px;font-size:15px;font-weight:600;min-height:44px}main{max-width:1240px;padding:36px 24px 44px;margin:auto}.lab-heading{display:flex;align-items:center;justify-content:space-between;gap:24px}.eyebrow{font-size:13px;letter-spacing:.9px;font-weight:650;color:#4e778f;display:block}.lab-heading h1{font-size:30px;letter-spacing:-.7px;margin-top:7px;line-height:1.3}.lesson-time{font-size:15px;white-space:nowrap;color:var(--muted)}.learning-steps{display:flex;margin:28px 0;gap:5px;padding:10px;background:#e6edf2;border-radius:12px}.learning-steps button{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 9px;flex:1;border:0;border-radius:8px;background:transparent;color:#5a7180;min-height:52px}.learning-steps button 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p{font-size:15px;line-height:1.7;color:var(--muted);margin-top:8px}.route-overview{display:flex;align-items:center;justify-content:space-between;gap:8px;border-radius:9px;background:#eef6fa;padding:14px 10px;margin:24px 0 17px;font-size:13px;font-weight:600;white-space:nowrap}.route-overview b{color:#1a9cd6;font-size:18px}.question-tip{background:#f7f9fa;border-radius:9px;font-size:14px;line-height:1.7;color:#647985;padding:16px;margin-top:22px}.network-details summary{font-size:14px}.network-details p{font-size:14px;line-height:1.9;padding:14px 0;overflow-wrap:anywhere}.work-card{padding:32px;min-height:530px}.step-caption{display:block;font-size:13px;font-weight:650;color:#577d95;letter-spacing:1px;margin-bottom:10px}.work-card h2{font-size:25px;letter-spacing:-.5px;line-height:1.4;margin-bottom:14px}.stage-intro{font-size:17px;line-height:1.7;color:var(--muted);margin-bottom:25px;max-width:650px}.simple-checklist{border:1px solid #e0eaf0;border-radius:12px;background:#f8fbfd;padding:13px 22px}.simple-checklist p{display:flex;align-items:center;gap:15px;font-size:16px;line-height:1.65;padding:11px 0}.simple-checklist p span{width:28px;height:28px;border-radius:50%;background:#e4f1f8;color:#1175a2;display:grid;place-items:center;font-weight:650;font-size:14px;flex-shrink:0}.next-action{margin-top:28px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}.next-action>span{font-size:14px;color:var(--muted);flex-basis:100%}.test-path{display:flex;align-items:center;gap:25px;border:1px solid #dce7ed;padding:20px;border-radius:10px;background:#f7fafc;margin:22px 0}.test-path>div{flex:1}.test-path small{display:block;color:#718a99;font-size:12px;letter-spacing:.8px;margin-bottom:5px}.test-path strong{display:block;font-size:17px}.test-path span{font-size:14px;color:#627987}.test-path>b{font-size:25px;color:#199acf}.input-label{display:block;font-size:16px;font-weight:600;margin:22px 0 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25px;padding:0 24px;display:flex;justify-content:space-between;gap:20px;color:#6d8492;font-size:14px}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);z-index:50;background:#173e51;color:white;border-radius:10px;padding:16px 23px;box-shadow:0 8px 35px #17322325;opacity:0;pointer-events:none;transition:.2s;max-width:90%;width:max-content;font-size:16px;line-height:1.6}#toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:1100px){.app-header{padding:22px 24px}.brand{gap:18px}.logo-window{width:175px}.product-name{padding-left:18px;font-size:16px}.header-actions{gap:14px}.header-actions>.text-button{display:none}.lesson-layout{grid-template-columns:310px minmax(0,1fr);gap:20px}.work-card{padding:27px}.question-card{padding:23px}.learning-steps button strong{font-size:14px}.learning-steps button{gap:7px;padding:10px 5px}.learning-steps{padding:8px}.route-overview{font-size:12px}.lab-heading h1{font-size:28px}}
@media(max-width:850px){.lesson-layout{grid-template-columns:1fr}.question-card{position:static}.question-card .question-tip{display:none}.question-card .route-overview{display:none}.question-card .network-details{margin-top:12px}.objective{padding-top:15px;margin-top:15px}.question-card h2{font-size:21px;margin:12px 0}.question-card>p{font-size:16px}.work-card{min-height:0}.learning-steps{overflow-x:auto;justify-content:space-between;gap:9px}.learning-steps button{flex-direction:column;gap:6px;min-width:94px;padding:10px}.learning-steps button strong{font-size:13px;white-space:nowrap}.app-header .progress-label{display:none}.lab-heading h1{font-size:26px}.lesson-time{font-size:14px}.question-card .eyebrow{font-size:12px}}
@media(max-width:560px){.app-header{padding:19px 18px;gap:10px;align-items:center}.brand{display:block}.logo-window{width:168px}.product-name{display:block;border:0;padding:0;margin-top:9px;font-size:14px;color:#42677c;letter-spacing:.3px}.header-actions{gap:0}.header-actions .secondary{font-size:14px;padding:10px 13px;min-height:44px}main{padding:24px 16px 35px}.lab-heading{display:block}.lab-heading .eyebrow{font-size:12px;line-height:1.7}.lab-heading h1{font-size:25px;line-height:1.4;margin-top:8px}.lesson-time{display:block;margin-top:10px}.learning-steps{margin:20px 0;gap:5px;padding:7px}.learning-steps button{min-width:86px;padding:9px 5px}.learning-steps button strong{font-size:12px}.lesson-layout{gap:18px}.question-card,.work-card{padding:22px;border-radius:12px}.question-card h2{font-size:20px}.question-card>p{font-size:15px;line-height:1.8}.objective strong{font-size:15px}.objective p{font-size:15px}.work-card h2{font-size:23px}.stage-intro{font-size:16px}.simple-checklist{padding:12px 15px}.simple-checklist p{font-size:15px;gap:12px}.next-action{margin-top:24px;gap:12px}.next-action>.primary{width:100%;font-size:16px;padding:14px;min-height:52px}.next-action>.text-button{padding-left:0}.test-path{padding:16px;gap:14px}.test-path strong{font-size:15px}.test-path span{font-size:13px}.service-options{gap:8px}.service-options button{font-size:15px}.service-options small{font-size:12px}.result-banner{padding:17px;gap:12px}.result-banner strong{font-size:18px}.result-banner p{font-size:15px}.decisive-step{padding:17px}.decisive-step strong{font-size:16px}.decisive-step p{font-size:15px}.comparison{grid-template-columns:1fr}.form-row{grid-template-columns:1fr;gap:14px}.interface-row{gap:14px}.interface-label{width:100%}.interface-row .form-label{min-width:100%}.tabs{gap:7px}.tabs button{padding:9px;font-size:13px}.rule-card{padding:14px}.rule-title strong{font-size:15px}.rule-title .text-button{font-size:13px}.form-bottom{align-items:flex-start;flex-direction:column}.form-bottom>span{max-width:none}.form-bottom button{align-self:flex-end}.check-label{font-size:15px}.answer{padding:15px;gap:12px;font-size:15px}.decision-list{padding-left:23px}.decision-list li{padding-left:4px}footer{display:block;padding:0 18px;font-size:13px}footer span{display:block;margin-top:5px}dialog{padding:25px;max-width:calc(100% - 24px)}dialog h2{font-size:23px}.lesson-list small{font-size:13px}.lesson-list button{gap:12px}.lesson-list strong{font-size:15px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.work-card{min-height:350px}
@media(max-width:560px){.learning-steps{overflow:visible;gap:6px;justify-content:space-around}.learning-steps button{min-width:0;flex:1;min-height:48px;padding:9px 4px}.learning-steps button strong{display:none}.learning-steps button span{width:30px;height:30px;font-size:15px}.work-card{min-height:0}}
.config-evidence{border:1px solid #cbdfea;border-radius:11px;background:#f9fcfe;margin:22px 0 25px}.config-evidence>summary{padding:17px 19px;font-size:16px;color:#155c7b}.config-evidence>summary>span{display:block;margin:5px 0 0 16px;font-size:13px;color:#628095;font-weight:400}.evidence-body{padding:0 20px 20px}.evidence-intro{font-size:15px;line-height:1.75;color:var(--muted);margin-bottom:17px}.evidence-section{border-top:1px solid #dae6ee;padding-top:20px;margin-top:22px}.evidence-section h3{font-size:17px;line-height:1.5;margin-bottom:14px}.client-evidence{display:flex;flex-wrap:wrap;gap:6px 19px;font-size:14px;line-height:1.8;margin-bottom:13px}.evidence-table-wrap{max-width:100%;overflow-x:auto;border:1px solid #dce7ed;border-radius:8px}.evidence-table-wrap table{border-collapse:collapse;width:100%;text-align:left;font-size:14px;line-height:1.6;background:white}.evidence-table-wrap th{font-weight:600}.evidence-table-wrap thead{background:#edf4f8;color:#4b6e82}.evidence-table-wrap td,.evidence-table-wrap th{padding:11px 10px;border-bottom:1px solid #e5edf2;white-space:nowrap}.evidence-table-wrap tbody tr:last-child>*{border-bottom:0}.evidence-table-wrap small{display:block;font-size:12px;color:#718592;font-weight:400;margin-top:4px}.config-state{display:inline-block;border-radius:5px;padding:2px 8px;font-size:13px;white-space:nowrap;font-weight:500}.config-state.on{background:#edf7f1;color:#276e54}.config-state.off{background:#fff1df;color:#996b24}.evidence-hint{font-size:14px;line-height:1.8;color:#617c8d;margin-top:13px}.evidence-empty{background:#fff3df;border-radius:7px;padding:13px;font-size:15px;color:#8c641f}.connected-evidence{margin-top:12px}.connected-evidence summary{font-size:14px}.connected-evidence ul{padding-left:22px;font-size:14px;line-height:1.9;color:#4e7084}.evidence-policy{background:white;border:1px solid #d9e5ec;border-radius:9px;padding:16px;margin:13px 0}.evidence-policy-title{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.evidence-policy-title>strong{font-size:15px;line-height:1.7}.evidence-policy dl{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;margin:15px 0 0}.evidence-policy dt{font-size:13px;color:#708a99;margin-bottom:3px}.evidence-policy dd{font-size:15px;color:#254e67;margin:0;overflow-wrap:anywhere}.local-ping-note{background:#edf5fa;border-radius:7px;padding:14px;font-size:14px;line-height:1.8;color:#466b82;margin-top:16px}.return-evidence{border-top:1px solid #dce7ed;padding-top:16px;margin-top:21px;font-size:14px;line-height:1.8;color:#536f80}
@media(max-width:560px){.evidence-body{padding:0 14px 16px}.config-evidence>summary{padding:15px 14px;font-size:15px}.config-evidence>summary>span{font-size:13px;line-height:1.7}.evidence-policy{padding:13px}.evidence-policy dl{grid-template-columns:1fr}.evidence-policy-title{flex-wrap:wrap;gap:7px}.client-evidence{display:block}.client-evidence span{display:block}.evidence-table-wrap td,.evidence-table-wrap th{padding:10px 9px}.evidence-hint{font-size:14px}.evidence-section h3{font-size:16px}}
.work-card,.question-card,.config-evidence,.evidence-body{min-width:0}.evidence-table-wrap{width:100%}
@media(max-width:850px){.lesson-layout{grid-template-columns:minmax(0,1fr)}}
@media(max-width:560px){.evidence-table-wrap:after{content:'Desliza la tabla para ver todas las columnas.';display:block;padding:10px;font-size:13px;line-height:1.5;color:#627987;background:#f4f8fb;position:sticky;left:0}}
/* One reading column, three phases, one clear next action. */
main{max-width:1080px}.case-banner{background:#eaf3f8;border:1px solid #d6e6ef;border-radius:12px;padding:20px 25px;margin:20px 0}.case-banner>span{display:block;font-size:12px;letter-spacing:1px;font-weight:700;color:#567990;margin-bottom:7px}.case-banner h2{font-size:20px;line-height:1.5}.case-banner details{margin-top:8px}.case-banner summary{font-size:14px;padding:5px 0}.case-banner p{font-size:15px;color:var(--muted);margin:10px 0;line-height:1.7}.work-card{padding:28px 30px}.simple-steps{display:flex;justify-content:center;align-items:center;gap:45px;margin:25px 0}.simple-steps>span{display:flex;align-items:center;gap:9px;font-size:15px;color:#718795}.simple-steps b{display:grid;place-items:center;width:29px;height:29px;border-radius:50%;border:1px solid #cadbe5;font-size:14px;background:white}.simple-steps .current{color:#0877a0;font-weight:700}.simple-steps .current b{color:white;background:#087bab;border-color:#087bab}.config-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:22px 0 10px}.summary-card{padding:19px;background:#f5f9fc;border:1px solid #dce7ed;border-radius:10px;min-width:0}.summary-card h3{font-size:16px;margin-bottom:13px}.summary-card p{font-size:14px;line-height:1.85;padding:10px 0;border-top:1px solid #e0eaf0;overflow-wrap:anywhere}.summary-card p:first-of-type{padding-top:0;border-top:0}.fact-state{display:block;font-size:13px;color:#617c8d;line-height:1.75;margin-top:3px}.summary-card .summary-note{font-size:13px;color:#6b8494}.configuration-consultation .config-evidence{margin:10px 0 20px;background:white}.configuration-consultation .config-evidence>summary{padding:12px 16px;font-size:14px}.configuration-consultation .config-evidence>summary>span{display:none}.test-path{margin:18px 0;padding:16px 20px}.prediction-choices{border:0;margin:24px 0 5px;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:11px}.prediction-choices legend{font-size:18px;font-weight:700;margin-bottom:15px;padding:0}.prediction-choices label{display:flex;gap:11px;align-items:center;border:1px solid #cddde6;background:white;border-radius:9px;padding:15px;font-size:16px;line-height:1.5;cursor:pointer;min-height:65px}.prediction-choices input{width:18px;height:18px;accent-color:var(--primary);flex-shrink:0}.prediction-choices label:has(input:checked){border:2px solid #147ead;background:#eff8fd;padding:14px;box-shadow:0 0 0 2px #0a8cbb12}.choice-icon{font-size:23px;line-height:1;color:#5d8499;flex-shrink:0;width:24px;text-align:center}.prediction-verdict{display:grid;grid-template-columns:70px 1fr;gap:18px;border-radius:13px;padding:25px;border:2px solid;margin:19px 0 22px}.prediction-verdict.correct{background:#edf8f0;border-color:#8fc9a7;color:#1d6943}.prediction-verdict.incorrect{background:#fff3ed;border-color:#eab19a;color:#983e2a}.prediction-symbol{display:grid;place-items:center;width:70px;height:70px;border-radius:50%;font-size:43px;font-weight:750;line-height:1}.correct .prediction-symbol{background:#238451;color:white}.incorrect .prediction-symbol{background:#b4553b;color:white}.verdict-label{display:block;font-size:12px;letter-spacing:1px;font-weight:700;margin-bottom:4px}.prediction-verdict h3{font-size:29px;line-height:1.3;margin:0 0 7px;letter-spacing:-.5px}.prediction-verdict p{font-size:16px;line-height:1.65}.expected-actual{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid #20523d20;padding-top:17px}.expected-actual>div>span{display:block;font-size:12px;font-weight:650;letter-spacing:.6px;margin-bottom:6px}.expected-actual strong{font-size:16px;line-height:1.65;font-weight:600}.packet-outcome{padding:17px 20px;border-radius:9px;border:1px solid #d6e4ed;background:#f6f9fc;margin:18px 0}.packet-outcome>span{font-size:12px;letter-spacing:.8px;color:#637f90;display:block;margin-bottom:4px}.packet-outcome strong{font-size:19px;color:#254d64}.packet-outcome p{font-size:16px;color:var(--muted);margin-top:5px;line-height:1.65}.result-next{border-top:1px solid var(--line);padding-top:23px;margin-bottom:25px}.result-next>.next-label{font-size:12px;font-weight:700;letter-spacing:1px;color:#587d92;flex-basis:100%}.result-next .primary{font-size:17px;padding:14px 23px}.trace-details,.comparison-details{background:white}.destination-options{font-size:14px}
@media(max-width:730px){.config-summary{grid-template-columns:minmax(0,1fr)}.summary-card{padding:17px}.summary-card p{font-size:15px}.fact-state{font-size:14px}.prediction-choices{grid-template-columns:1fr}.work-card{padding:22px}.simple-steps{gap:23px}.case-banner{padding:19px 22px}.prediction-verdict{padding:21px;grid-template-columns:54px 1fr;gap:15px}.prediction-symbol{width:54px;height:54px;font-size:35px}.prediction-verdict h3{font-size:25px}.expected-actual{grid-template-columns:1fr;gap:15px}.prediction-verdict p{font-size:15px}}
@media(max-width:420px){.simple-steps{gap:17px}.simple-steps>span{font-size:14px;gap:6px}.case-banner h2{font-size:19px}.prediction-verdict h3{font-size:23px}.prediction-verdict{padding:17px;gap:12px}.prediction-choices label{font-size:15px}.choice-icon{font-size:21px}.work-card{padding:20px}.case-banner{padding:18px 20px}.prediction-verdict .expected-actual strong{font-size:15px}}
.case-objective{font-size:15px;color:#496b7e;line-height:1.7;margin-top:9px}
.test-reference{border:1px solid #dce7ed;border-radius:9px;padding:17px 20px;background:#f8fbfd;margin:20px 0}.test-reference h3{font-size:16px;line-height:1.5;margin-bottom:10px}.test-reference>p{font-size:14px;line-height:1.8;margin:5px 0;overflow-wrap:anywhere;color:#4a6b7d}.test-reference>details>summary{font-size:14px;margin-top:7px}.test-reference .config-summary{margin-top:13px}.test-reference .summary-card{padding:14px}.test-reference .config-evidence{background:white}
@media(max-width:560px){.test-reference{padding:16px}.test-reference>p{font-size:15px}.test-reference>details>summary{font-size:14px}}
/* Interactive network is the primary workspace. */
main{max-width:1280px}.topology-panel{background:#fff;border:1px solid #d4e4ec;border-radius:15px;overflow:hidden;margin:23px 0}.topology-header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 26px 0}.topology-header h2{font-size:21px;line-height:1.5;margin-top:6px}.live-config{font-size:13px;color:#598975;white-space:nowrap}.topology-scroll{overflow-x:auto;max-width:100%}.topology-canvas{position:relative;width:100%;min-width:960px;aspect-ratio:1000/420;background-image:radial-gradient(#d4e2e9 1px,transparent 1px);background-size:20px 20px;margin-top:16px}.network-wires{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.network-wires>path{fill:none;stroke-width:4;stroke-linecap:round}.topo-node{position:absolute;transform:translate(-50%,-36px);display:flex;flex-direction:column;align-items:center;width:180px;border:0;background:transparent;padding:0;color:#264e65;z-index:2;min-height:150px;line-height:1.4}.node-icon{width:74px;height:74px;border:2px solid #b7d7e6;border-radius:15px;background:#fff;display:grid;place-items:center;padding:15px;box-shadow:0 4px 12px #14374a0c;position:relative}.node-icon svg{width:100%;height:100%;fill:none;stroke:#28799f;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}.topo-node.firewall .node-icon{border-color:#e7b5b0;background:#fff6f3}.topo-node.firewall svg{stroke:#cc5a50}.topo-node.isp .node-icon{border:0;box-shadow:none;background:#f3f8fb}.topo-node.isp svg{stroke:#6d96ae}.node-icon i{position:absolute;bottom:7px;right:7px;width:10px;height:10px;border-radius:50%;border:2px solid white}.node-icon i.up{background:#42a17b}.node-icon i.down{background:#cc675f}.topo-node>strong{font-size:16px;margin-top:12px}.node-ip{font-size:14px;margin-top:5px;color:#3b6178;white-space:nowrap}.node-caption{font-size:12px;color:#7b94a2;margin-top:6px;line-height:1.6}.topo-node:hover .node-icon,.topo-node.selected .node-icon{border-color:#009fe0;box-shadow:0 0 0 5px #1ca0d512}.topo-node.processing .node-icon{box-shadow:0 0 0 7px #009fd325}.link-label{position:absolute;top:16.5%;font-size:12px;font-weight:600;border:1px solid #d4e4ec;border-radius:5px;background:#f9fdff;color:#518198;padding:5px 10px;z-index:3}.lan-label{left:23%}.wan-label{left:51%}.topo-route-chip,.topo-policy-chip{position:absolute;left:41%;transform:translateX(-50%);border:1px solid #caddE8;border-radius:9px;background:#fff;box-shadow:0 3px 10px #193b4c08;min-width:250px;max-width:360px;text-align:center;padding:11px 14px;color:#476b80;z-index:3}.topo-route-chip{top:1%}.topo-policy-chip{top:64%}.topo-route-chip>span,.topo-policy-chip>span{display:block;font-size:10px;font-weight:650;letter-spacing:.6px;color:#88a0af;margin-bottom:5px}.topo-route-chip strong,.topo-policy-chip strong{display:block;font-size:14px;line-height:1.65}.topo-policy-chip small{display:block;font-size:11px;line-height:1.7;color:#8aa0ad}.topo-branch{position:absolute;left:25%;top:80%;transform:translateX(-50%);background:#f7fafc;border:1px dashed #c8dce7;border-radius:8px;padding:10px 17px;font-size:12px;line-height:1.7;color:#6a8395;z-index:2}.topology-legend{padding:13px 23px;border-top:1px solid #e2ecf2;display:flex;align-items:center;gap:23px;font-size:12px;color:#7792a0;background:#fcfefe;flex-wrap:wrap}.topology-legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}.legend-up{background:#4c9b7d}.legend-down{background:#ce746c}.legend-packet{background:#1b9bcd}.map-scroll-note{display:none}.topology-tip{font-size:14px;line-height:1.8;color:#65889c;padding:15px 25px;border-top:1px solid #e7eff3}.node-inspector{padding:23px 26px;background:#f6fbfe;border-top:1px solid #dce8ef}.inspector-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:12px}.inspector-heading h3{font-size:18px}.node-inspector p{font-size:15px;line-height:1.9;color:#52788e;margin:9px 0;overflow-wrap:anywhere}.inspector-actions{display:flex;align-items:center;gap:15px;margin-top:17px;flex-wrap:wrap}.inspector-rule{border-top:1px solid #dce8ef;padding:13px 0}.inspector-rule>strong{font-size:15px}.node-inspector .inspector-note{font-size:14px;color:#7794a4}.journey-controls{padding:23px 26px;background:#eff7fc;border-top:1px solid #d8e8f1}.journey-caption>span{font-size:12px;font-weight:700;letter-spacing:.7px;color:#4d91b2;display:block;margin-bottom:6px}.journey-caption>strong{font-size:18px;display:block;color:#245a78}.journey-caption>p{font-size:15px;line-height:1.75;color:#567d93;margin-top:8px}.packet-fields{display:flex;gap:10px 23px;margin:14px 0;font-size:13px;color:#5f869c;flex-wrap:wrap}.journey-buttons{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:15px}.journey-buttons .secondary{font-size:14px;min-height:44px;padding:10px 14px}.journey-buttons .text-button{font-size:13px}.travel-packet{pointer-events:none;filter:drop-shadow(0 2px 3px #07324f30)}.travel-packet>rect{fill:#008cd1;stroke:white;stroke-width:2}.travel-packet>path{fill:none;stroke:white;stroke-width:2}.travel-packet.failed>rect{fill:#c9574a}.travel-packet circle{fill:#c94f43;stroke:white;stroke-width:2}.travel-packet text{fill:white;font-size:20px;font-weight:700}.travel-packet.moving{animation:packet-travel .8s ease-in-out both}@keyframes packet-travel{from{transform:translate(var(--from-x),var(--from-y))}to{transform:translate(var(--to-x),var(--to-y))}}.test-endpoints{font-size:15px;color:#638498;line-height:1.8;margin:17px 0}.journey-wait{font-size:16px;line-height:1.8;color:#598298;padding:16px 0}.case-banner{padding:17px 23px;margin:18px 0}.case-banner h2{font-size:19px}.case-objective{font-size:14px}.simple-steps{margin:18px 0;gap:35px}
@media(max-width:960px){.map-scroll-note{display:block;flex-basis:100%;font-size:13px}.live-config{display:none}.topology-header{padding:20px 22px 0}.topology-header h2{font-size:19px}.topology-panel{min-width:0}.topology-legend{gap:12px 18px}}
@media(max-width:560px){.topology-header{padding:19px 20px 0}.topology-header h2{font-size:18px}.topology-canvas{min-width:940px}.topology-legend{padding:12px 18px;font-size:11px}.topology-tip{padding:16px 19px;font-size:14px}.journey-controls,.node-inspector{padding:20px}.journey-caption>strong{font-size:17px}.journey-buttons .secondary{font-size:13px;padding:10px 12px}.packet-fields{font-size:13px;gap:9px 15px}.inspector-actions .secondary{font-size:14px}.case-banner{padding:17px 20px}.case-banner h2{font-size:18px}.simple-steps{gap:23px}}
@media(prefers-reduced-motion:reduce){.travel-packet.moving{animation:none!important}}
.app-header{padding-top:17px;padding-bottom:17px}main{padding-top:24px}.lab-heading h1{font-size:27px}.simple-steps{margin:12px 0}.case-banner{padding:13px 21px;margin:12px 0}.case-banner>span{font-size:11px;margin-bottom:4px}.case-banner h2{font-size:18px}.case-objective{font-size:14px;margin-top:6px}.case-banner details{margin-top:3px}.case-banner summary{font-size:13px}.topology-panel{margin:18px 0}.topology-header{padding-top:20px}.topology-header .primary{font-size:14px;white-space:nowrap;padding:11px 16px}.topology-canvas{margin-top:12px}
@media(max-width:560px){.topology-header{flex-wrap:wrap;gap:13px}.topology-header .primary{width:100%;font-size:16px;padding:12px 16px}.lab-heading h1{font-size:24px}.case-banner{padding:15px 18px}.topology-canvas{min-width:940px}}
.topo-route-chip small{display:block;font-size:11px;line-height:1.6;color:#7994a5;margin-top:3px}
.packet-overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:4}.travel-packet.response>rect{fill:#8566b9}.travel-packet.failed>rect{fill:#c9574a}
.topology-canvas{max-width:1000px;margin-left:auto;margin-right:auto}.journey-controls{padding:17px 24px}.journey-caption>p{margin-top:5px}.packet-fields{margin:9px 0;font-size:13px}.journey-buttons{margin-top:10px;gap:8px}.journey-buttons .secondary{padding:8px 12px;min-height:40px}.journey-result-link{display:flex;align-items:center;gap:8px;padding:8px 12px;font-size:14px;font-weight:650;border:1px solid;border-radius:7px;background:white}.journey-result-link.correct{color:#267947;border-color:#a4d0b2;background:#edf8f0}.journey-result-link.incorrect{color:#a34831;border-color:#e1b49f;background:#fff4ed}.journey-result-link>span{font-size:24px;line-height:1}
@media(max-width:560px){.journey-controls{padding:18px}.journey-caption>p{font-size:14px}.journey-result-link{font-size:13px}}
.topo-route-chip{padding-top:7px;padding-bottom:7px}.link-label{transform:translateX(-50%)}.lan-label{left:22%}.wan-label{left:60%}
.guided-target{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:18px 24px;background:#eaf5fc;border:1px solid #cce5f2;border-radius:16px;margin:20px 0;font-size:20px}.guided-target span{color:#547082}.guided-controls .packet-purpose{font-size:22px;color:#183c50;margin:10px 0 18px}.hop-explanation{border-left:4px solid #1997d2;padding:12px 18px;background:#fff;border-radius:8px}.hop-explanation b{font-size:20px}.hop-explanation p{font-size:18px;margin:6px 0}.packet-technical{margin-top:18px;font-size:17px}.packet-technical pre{white-space:pre-wrap;overflow-wrap:anywhere;background:white;padding:16px;border-radius:8px;font-size:16px}.journey-progress{font-size:16px;color:#547082;margin:16px 0 0}.model-note{margin:24px 0;font-size:17px;color:#567181}.model-note p{line-height:1.6;max-width:900px}.guided-complete{text-align:center}.completion-check{display:inline-grid;place-items:center;background:#daf4e8;color:#21835e;width:64px;height:64px;border-radius:50%;font-size:42px}.browser-example{max-width:540px;margin:20px auto;border:1px solid #cbdfe8;border-radius:12px;overflow:hidden;background:#fff}.browser-example small{display:block;background:#edf3f6;padding:12px;text-align:left}.browser-example h3{padding:24px}.guided-complete .text-button{margin-left:12px}@media(max-width:600px){.guided-target{padding:16px;font-size:18px}.guided-controls .packet-purpose{font-size:20px}.journey-buttons .primary{flex:1}.guided-complete .text-button{margin:16px 0 0}}
.guided-controls .journey-buttons{margin:0 0 22px}.guided-controls .journey-caption>strong{font-size:26px}.guided-controls .journey-caption>span{font-size:17px}.guided-controls .journey-caption .packet-purpose{margin:8px 0 16px}.guided-controls .hop-explanation p{margin-bottom:0}
.learning-dynamic{padding:20px 24px;background:#fff;border:1px solid #d5e5ee;border-radius:16px;margin-bottom:24px}.learning-dynamic h2{font-size:23px;margin:0 0 14px}.learning-dynamic ol{padding-left:24px;margin:0;display:grid;gap:10px;font-size:18px;line-height:1.5}.learning-dynamic>p{font-size:17px;color:#557387;margin:16px 0 0}.challenge-picker{display:grid;gap:8px;font-weight:700;margin-bottom:22px;font-size:18px}.challenge-picker select{width:100%;min-height:52px;border:1px solid #b9d1e0;border-radius:12px;background:white;color:#153448;padding:12px;font-size:18px}.topology-click-hint{display:flex;align-items:center;flex-wrap:wrap;gap:8px;background:#eaf6ff;color:#145b83;padding:16px 24px;margin:0;border-block:1px solid #cee4f1;font-size:18px;line-height:1.5}.topology-click-hint>span{font-size:26px}.simple-comparison{padding:20px;background:#edf6fb;border:1px solid #cce0ed;border-radius:12px;font-size:19px;line-height:1.7;margin:20px 0}.challenge-target{color:#286584}.simple-steps span{font-size:18px}@media(max-width:600px){.learning-dynamic{padding:18px}.topology-click-hint{padding:14px 18px;font-size:17px}.simple-steps span{font-size:14px}.simple-steps b{flex-shrink:0}.challenge-picker select{font-size:16px}}
.immediate-verdict{border:2px solid #bddbe9;margin:24px 0;scroll-margin-top:18px}.immediate-verdict .prediction-verdict{margin-top:0}.verdict-invitation{font-size:21px;line-height:1.5;margin:22px 0}.immediate-verdict>.primary{min-height:54px;font-size:20px}.immediate-verdict h2{scroll-margin-top:24px}@media(max-width:600px){.immediate-verdict>.primary{width:100%;font-size:18px}.verdict-invitation{font-size:19px}}
.laboratory-counter{font-size:20px;font-weight:750;white-space:nowrap;color:#17455e}.laboratory-header{gap:20px}.catalog-intro{margin:12px 0 24px}.catalog-intro h1{font-size:36px;max-width:850px;margin:12px 0}.catalog-intro>p{font-size:21px;line-height:1.6;max-width:850px;color:#506b7e}.catalog-stats{display:flex;gap:24px;flex-wrap:wrap;margin-top:22px;font-size:18px}.catalog-stats b{font-size:24px;color:#087db0}.catalog-instructions{padding:22px 26px;background:#eaf5fc;border:1px solid #cfe4ef;border-radius:16px;margin-bottom:26px}.catalog-instructions h2{font-size:23px;margin:0 0 12px}.catalog-instructions p{font-size:18px;line-height:1.7;margin:8px 0}.catalog-search{display:block;font-size:18px;font-weight:700;margin:12px 0}.catalog-search-input{width:100%;max-width:640px;padding:14px 18px;border:1px solid #b9d1df;border-radius:12px;font-size:18px;background:white}.catalog-found{font-size:16px;color:#557282;margin:18px 0}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-bottom:32px}.laboratory-card{text-align:left;display:flex;flex-direction:column;border:1px solid #cedfe9;border-radius:18px;background:#fff;padding:24px;color:#17394c;box-shadow:0 3px 10px #153e5206;transition:border-color .2s,box-shadow .2s}.laboratory-card:hover,.laboratory-card:focus-visible{border-color:#0a9adc;box-shadow:0 7px 22px #16729b18}.laboratory-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.laboratory-number{display:grid;place-items:center;width:50px;height:50px;border-radius:12px;background:#eaf5fc;color:#087dab;font-size:25px;font-weight:750}.laboratory-status{font-size:14px;color:#607989}.laboratory-status.complete{color:#258559;font-weight:700}.laboratory-topic{font-size:14px;color:#55798f;margin-top:22px}.laboratory-card h2{font-size:23px;line-height:1.35;margin:10px 0}.laboratory-card p{font-size:17px;line-height:1.6;color:#556f80;margin:0 0 20px}.laboratory-card-bottom{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:10px;padding-top:18px;border-top:1px solid #e5edf3;font-size:16px}.laboratory-card-bottom strong{color:#087db0}.catalog-empty{font-size:20px;grid-column:1/-1;padding:30px;background:#fff;border-radius:12px}@media(max-width:1000px){.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.catalog-grid{grid-template-columns:1fr;gap:18px}.catalog-intro h1{font-size:29px}.catalog-intro>p{font-size:19px}.catalog-instructions{padding:18px}.catalog-instructions p{font-size:17px}.laboratory-card{padding:22px}.laboratory-header{width:100%;justify-content:space-between;gap:12px}.laboratory-counter{font-size:19px}.laboratory-header .primary{padding:10px 16px;font-size:17px}.catalog-stats{gap:16px}.app-header:has(.laboratory-header){flex-wrap:wrap}}
.catalog-instructions summary{font-size:21px;font-weight:700;cursor:pointer}.catalog-instructions:not([open]){padding:16px 24px}
.next-guidance{display:flex;align-items:center;gap:18px;padding:20px 24px;border:1px solid #baddeb;border-left:5px solid #0a96ce;background:#eaf6ff;border-radius:14px;margin:20px 0}.guidance-number{display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;border-radius:50%;background:#0b86bc;color:white;font-size:23px;font-weight:750}.next-guidance>div{flex:1}.next-guidance h2{font-size:22px;margin:5px 0;line-height:1.4}.next-guidance p{font-size:18px;line-height:1.6;color:#3e6277}.next-guidance .primary{white-space:nowrap}.primary.action-next{box-shadow:0 0 0 4px #139bd316,0 4px 12px #0578ac1c;transition:background .15s,box-shadow .15s}.primary.action-next:not(:disabled):hover{box-shadow:0 0 0 5px #139bd327,0 5px 15px #0578ac28}.primary.action-next:disabled{box-shadow:none}.suggested-node .node-icon{box-shadow:0 0 0 5px #16a6e325;border-color:#1799cd}.action-hint{font-size:17px;color:#4c6e83;width:100%;margin-bottom:8px}.journey-instruction{font-size:19px;line-height:1.5;margin-bottom:14px;color:#264f68}.journey-controls .journey-caption{margin-top:20px}.journey-controls .journey-caption>p{font-size:18px;line-height:1.6}.journey-controls .packet-fields{font-size:16px}.simple-steps>span{min-width:0;flex:1}.laboratory-header .secondary{white-space:nowrap;font-size:16px}@media(max-width:720px){.next-guidance{flex-wrap:wrap;padding:18px;gap:12px}.next-guidance>div{flex-basis:calc(100% - 60px)}.next-guidance>.primary{width:100%;white-space:normal}.simple-steps{gap:5px;padding:8px}.simple-steps>span{gap:5px;flex-direction:column;font-size:14px}.journey-instruction{font-size:18px}.laboratory-header .secondary{font-size:15px;padding:10px 12px}.laboratory-counter{font-size:17px}}
.inspector-extra{width:100%;font-size:16px}.inspector-extra summary{cursor:pointer;color:#54768a;padding:12px 0}.inspector-actions{align-items:center}.inspector-actions>.primary{margin-bottom:6px}