@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--ink:#153440;--muted:#62777c;--paper:#f4f7f6;--teal:#087f78;--lime:#d8f58c;--border:#dbe5e2}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;background:var(--paper);color:var(--ink);font:16px 'DM Sans',Segoe UI,sans-serif;line-height:1.65}h1,h2,h3,.brand{font-family:'Space Grotesk',Segoe UI,sans-serif}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #cf801e;outline-offset:4px}aside{position:fixed;inset:0 auto 0 0;width:260px;background:#102b36;color:#c4d5d8;padding:34px 24px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;text-decoration:none;font-size:30px;font-weight:700;color:white;letter-spacing:-1px}.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--lime);color:#102b36;font-size:26px;margin-right:10px}.brand-dot{color:var(--lime)}.aside-label{font-size:10px;letter-spacing:2px;color:#8fa7ae;margin:50px 0 15px}nav{display:grid;gap:8px}nav a{padding:12px;border-radius:8px;text-decoration:none;display:flex;gap:12px;font-size:13px}nav a:hover,nav a.active{background:#21414b;color:white}.aside-bottom{margin-top:auto;font-size:12px;color:#abc0c5}.aside-bottom p{line-height:1.6}.aside-bottom button{color:#c4d5d8}.status-dot{display:inline-block;width:7px;height:7px;background:var(--lime);border-radius:50%;margin-right:7px}main{max-width:1510px;margin-left:260px;padding:30px 6% 0}header{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:10px;letter-spacing:1.4px;color:var(--muted);border-bottom:1px solid var(--border);padding-bottom:22px}.pill,.tag{font-size:11px;border:1px solid var(--border);border-radius:30px;padding:5px 12px;white-space:nowrap}.hero{display:grid;grid-template-columns:1.35fr 1fr;gap:38px;align-items:center;padding:65px 0 50px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--teal);margin:0 0 15px}h1{font-size:clamp(36px,4.6vw,66px);line-height:1.08;letter-spacing:-3px;margin:0 0 22px}h1 em{font-style:normal;color:var(--teal)}.intro{max-width:480px;color:var(--muted);margin-bottom:28px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;background:var(--teal);color:white;border:0;border-radius:8px;padding:12px 20px;font-weight:600;text-decoration:none}.button:hover{background:#096c66}.hero-art{position:relative;background:#e4eeea;border:1px solid #d5e3de;border-radius:24px;min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:28px;background-image:radial-gradient(#bdd2ca 1px,transparent 1px);background-size:18px 18px}.art-node{background:white;border:1px solid #d0dfd9;border-radius:10px;padding:8px 25px;text-align:center;font-size:9px;letter-spacing:1px;box-shadow:0 6px 16px #15344008}.art-node strong{display:block;font:600 20px 'Space Grotesk',monospace;letter-spacing:0}.art-line{width:2px;height:23px;background:var(--teal)}.art-switch{font-size:9px;letter-spacing:3px;text-align:center;background:#153440;color:var(--lime);padding:4px 24px;border-radius:7px}.art-caption{font-size:11px;margin-top:14px;color:#55746a}.progress-card{display:flex;justify-content:space-between;gap:25px;align-items:center;background:white;border:1px solid var(--border);padding:22px 26px;border-radius:12px;margin-bottom:28px}.progress-card p{font-size:13px;color:var(--muted);margin:2px 0}.progress-right{min-width:200px;font-size:12px}progress{display:block;width:100%;height:7px;margin-top:10px;border:0;border-radius:10px;overflow:hidden}progress::-webkit-progress-bar{background:#e8efeb}progress::-webkit-progress-value{background:var(--teal)}.lesson{background:white;border:1px solid var(--border);border-radius:16px;padding:35px;margin-bottom:24px;scroll-margin-top:25px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}h2{font-size:30px;line-height:1.2;letter-spacing:-1px;margin:0 0 14px}.section-heading .eyebrow{margin-bottom:8px}.lesson>p{color:var(--muted)}.note{background:#eef5ef;border-left:3px solid #9cbe67;padding:14px 18px;font-size:14px;margin:20px 0;border-radius:0 7px 7px 0}.workshop{background:#f6f8f7;border:1px solid var(--border);border-radius:12px;padding:23px;margin:24px 0}.workshop-top{display:flex;align-items:center;justify-content:space-between;font-size:10px;letter-spacing:1px;gap:10px}.small-button{background:white;color:var(--ink);border:1px solid #ceddd7;border-radius:7px;padding:7px 12px;font-size:12px}.text-button{background:none;border:0;padding:0;color:var(--teal);text-decoration:underline;font-size:13px}.big-address{display:block;font:600 clamp(28px,4vw,46px) 'Space Grotesk',monospace;text-align:center;margin:22px 0;letter-spacing:-1px}.octets{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.octet-title{font-size:10px;font-weight:700;letter-spacing:1px}.bits{display:grid;grid-template-columns:repeat(8,1fr);gap:4px;margin-top:10px}.bits>div{text-align:center}.bits span{display:block;font-size:9px;color:var(--muted);margin-bottom:5px}.bit{display:block;width:100%;height:37px;background:white;border:1px solid #cedbd5;border-radius:5px;color:var(--muted);font:600 17px monospace}.bit.on{background:var(--ink);color:var(--lime);border-color:var(--ink)}.feedback{font-size:14px;padding:12px 14px;background:#e9f0ed;border-radius:7px}.mini-task{margin-bottom:22px}.mini-task p{font-size:14px;margin:5px 0}.workshop>label{display:flex;justify-content:space-between;font-weight:600}#prefixLabel{font-size:23px;color:var(--teal)}input[type=range]{width:100%;accent-color:var(--teal);margin:20px 0}.legend{display:flex;gap:20px;font-size:12px;margin-bottom:14px}.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px}.network-color{background:var(--ink)}.host-color{background:#d7ecae}.mask-bits{display:grid;grid-template-columns:repeat(32,1fr);gap:2px}.mask-bits span{font:12px monospace;text-align:center;padding:9px 0;border-radius:3px}.network-bit{background:var(--ink);color:white}.host-bit{background:#d7ecae;color:#294713}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0}.stats span{display:block;font-size:11px;color:var(--muted)}.stats strong{font:600 18px 'Space Grotesk',monospace}details{font-size:14px;margin-bottom:22px}summary{cursor:pointer;color:var(--teal);font-weight:600}.topology{display:grid;grid-template-columns:1fr 130px 1fr;align-items:center;margin:25px 0}.device{border:1px solid var(--border);border-radius:12px;padding:20px;background:#f6f8f7}.device-icon{font-size:28px;color:var(--teal)}h3{margin:0 0 10px;font-size:18px}.device label{display:block;font-size:11px;color:var(--muted);margin-top:8px}.device input,.device select{width:100%;padding:8px;border:1px solid #c9d9d1;border-radius:6px;background:white;color:var(--ink)}.device p{font-size:11px;margin-bottom:0}.switch{display:flex;align-items:center;flex-direction:column;font-size:11px;text-align:center}.switch strong{background:var(--ink);color:var(--lime);border-radius:8px;padding:8px 20px;line-height:1.4}.switch span{margin-top:5px;color:var(--muted)}.connection{width:100%;height:2px;background:#a8c4b9}.lab-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.lab-result{padding:20px;background:#edf2f0;border-radius:9px;margin-top:22px;font-size:14px}.success{background:#e7f4de;color:#2d5720}.failure{background:#fff0d9;color:#805117}.muted{font-size:12px!important;color:var(--muted)}fieldset{border:1px solid var(--border);border-radius:10px;padding:16px 20px;margin:20px 0}legend{font-weight:600;font-size:14px;padding:0 5px}fieldset label{display:block;font-size:14px;padding:7px;border-radius:5px}fieldset label:hover{background:var(--paper)}input[type=radio]{accent-color:var(--teal);margin-right:10px}#quizResult{margin-top:22px}.next{padding:35px 10px 45px}.next p{max-width:700px;color:var(--muted)}footer{border-top:1px solid var(--border);padding:22px 0;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:15px}
@media(min-width:1350px){.octets{grid-template-columns:repeat(4,1fr)}}@media(max-width:1000px){aside{width:210px;padding:25px 15px}main{margin-left:210px;padding:25px 4% 0}.hero{gap:22px;grid-template-columns:1fr}.hero-art{min-height:280px}.lesson{padding:25px}.topology{grid-template-columns:1fr 80px 1fr}.switch strong{padding:8px 10px}.mask-bits{grid-template-columns:repeat(16,1fr)}}@media(max-width:650px){aside{position:static;width:auto;padding:18px}.brand{font-size:26px}.aside-label,.aside-bottom{display:none}nav{display:flex;overflow:auto;margin-top:15px;gap:4px}nav a{white-space:nowrap;padding:7px 10px;font-size:11px}nav a span{display:none}main{margin:0;padding:20px 16px 0}header{font-size:8px}.hero{padding:35px 0;gap:24px}h1{letter-spacing:-2px;font-size:43px}.hero-art{min-height:290px}.progress-card{display:block;padding:18px}.progress-right{margin-top:15px}.lesson{padding:20px}.section-heading{display:block}.section-heading .tag{display:inline-block;margin-bottom:10px}h2{font-size:26px}.workshop{padding:14px}.octets{grid-template-columns:1fr}.stats{gap:12px}.stats strong{font-size:15px}.topology{grid-template-columns:1fr;gap:0}.switch{padding:12px}.connection{height:18px;width:2px}.switch span{margin:6px}.device{padding:17px}.lab-actions{align-items:stretch;gap:12px}.lab-actions .button{width:100%}.mask-bits span{font-size:11px}footer{display:block}footer span{display:block;margin-top:5px}.workshop-top{letter-spacing:0;font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
[hidden]{display:none!important}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0 35px}.course-card{background:white;border:1px solid var(--border);border-radius:12px;padding:22px;display:flex;flex-direction:column;gap:10px;text-decoration:none;transition:border-color .15s}.course-card:hover{border-color:var(--teal)}.course-card strong{font-family:'Space Grotesk',sans-serif;font-size:18px;line-height:1.3}.course-card>span:last-child{font-size:12px;color:var(--teal)}.course-card .eyebrow{margin:0}.lesson-pager{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:28px 0 40px}.lesson-pager a{text-decoration:none}.vlan-devices{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px}.vlan-devices select{width:100%;margin-top:6px}.vlan-devices p{font-size:13px}.contact-panel{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:30px 0}.contact-panel p{font-size:14px}.contact-panel h2{font-size:27px}.contact-panel a{font-size:16px;color:var(--teal)}.contact-panel label{display:block;font-size:12px;color:var(--muted);margin:10px 0 5px}.contact-panel input,.contact-panel textarea{width:100%;background:white;border:1px solid #c9d9d1;border-radius:7px;padding:10px;color:var(--ink);font:14px 'DM Sans',sans-serif}.contact-panel textarea{resize:vertical}.contact-panel .button{margin-top:12px;font-size:14px}footer{display:block;color:var(--ink)}.footer-line{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--border);padding:18px 0;font-size:11px;color:var(--muted)}.mobile-course-select{display:none}.routing-map+.route-path,.service-config+.route-path{flex-wrap:wrap}nav a[href="#vlan"],nav a[href="#trunk"]{font-size:12px}@media(max-width:1050px){.course-grid{grid-template-columns:repeat(2,1fr)}.vlan-devices{grid-template-columns:1fr}.contact-panel{gap:25px}}@media(max-width:650px){.course-grid{grid-template-columns:1fr}.course-card{padding:18px}.contact-panel{grid-template-columns:1fr;padding:24px 0;gap:18px}.lesson-pager{flex-wrap:wrap;justify-content:center}.lesson-pager>a{font-size:12px}.footer-line{display:block}.footer-line span{display:block;margin:5px 0}.mobile-course-select{display:block;width:100%;margin-top:15px;padding:10px;background:#21414b;color:white;border:1px solid #587880;border-radius:7px;font:14px inherit}aside nav{display:none}header{align-items:flex-start}header>span:first-child{max-width:65%}}
.service-config{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:24px 0}.service-config>div{background:#f6f8f7;border:1px solid var(--border);border-radius:12px;padding:22px;min-width:0}.service-config label:not(.router-toggle){display:block;font-size:12px;color:var(--muted);margin:12px 0 5px}.service-config input:not([type=checkbox]),.service-config select{display:block;width:100%;padding:9px;border:1px solid #c9d9d1;border-radius:6px;background:white;color:var(--ink)}.service-config .router-toggle{margin-top:16px}.service-config .lease-card{background:#eaf2ec}.lease-card dl{display:grid;grid-template-columns:auto 1fr;gap:12px;font-size:13px}.lease-card dt{color:var(--muted)}.lease-card dd{margin:0;overflow-wrap:anywhere;font-family:monospace}#dnsCache{overflow-wrap:anywhere}#dnsClock{font-size:12px}.dora-track{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.dora-track span{border:2px solid var(--border);background:white;border-radius:8px;text-align:center;padding:10px 4px;font-size:13px;font-weight:600}.dora-track .packet-active{border-color:var(--teal);background:#eaf7ed}#dhcp details,#dns details{margin-top:24px}#dns>.mini-task{margin-top:30px}#dns>.mini-task li{padding:6px 0;font-size:14px}nav a[href="#dhcp"],nav a[href="#dns"]{font-size:12px}@media(max-width:800px){.service-config{grid-template-columns:1fr}}@media(max-width:650px){.service-config>div{padding:17px}.dora-track{gap:4px}.dora-track span{font-size:10px;padding:9px 2px}nav a[href="#dhcp"],nav a[href="#dns"]{max-width:125px;white-space:normal;line-height:1.3}}
aside{overflow-y:auto}.aside-bottom{padding-top:24px}
.routing-map{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin:26px 0}.router-card{background:#e8f1ec;border-color:#b5d0c1}.router-toggle{display:flex!important;align-items:center;gap:8px;color:var(--ink)!important}.router-toggle input{width:auto;accent-color:var(--teal)}.route-path{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:8px 0 22px}.route-path span:not([aria-hidden]){padding:12px 18px;border:2px solid var(--border);border-radius:8px;background:white;font-size:13px;font-weight:600}.route-path span.packet-active{border-color:var(--teal);background:#eaf7ed}.route-lookup{margin:24px 0}.route-lookup>label{font-size:13px;font-weight:600}#routing details{margin-top:24px}.routing-map .eyebrow{font-size:9px}nav a[href="#gateway"],nav a[href="#routing"]{font-size:12px}@media(max-width:1050px){.routing-map{grid-template-columns:1fr}.route-path span:not([aria-hidden]){padding:10px;font-size:12px}}@media(max-width:650px){nav a[href="#gateway"],nav a[href="#routing"]{max-width:125px;white-space:normal;line-height:1.3}}
.table-scroll{overflow-x:auto;max-width:100%}table{width:100%;border-collapse:collapse;text-align:left;font-size:12px}caption{text-align:left;font-weight:700;font-size:13px;padding:12px 0}th{font-size:10px;color:var(--muted);letter-spacing:.5px;background:#eaf0ed}th,td{padding:11px 10px;border-bottom:1px solid var(--border);white-space:nowrap}tr.third-subnet{background:#e5f1d9}.subnet-strip{display:flex;gap:3px;margin:20px 0}.subnet-strip div{flex:1;text-align:center;background:var(--ink);color:white;border-radius:4px;padding:12px 2px;font-size:11px}.subnet-strip .third-subnet{background:var(--lime);color:var(--ink)}.workshop select{padding:6px 12px;border:1px solid var(--border);border-radius:6px;background:white;color:var(--ink);max-width:100%}.answer-input{display:block;width:100%;max-width:340px;padding:11px;border:1px solid #bfd2c8;border-radius:7px;margin:8px 0 18px;color:var(--ink)}.earned{font-size:13px;font-weight:600;color:var(--teal)}.packet-map{display:grid;grid-template-columns:1fr .8fr 1fr;gap:15px;margin:25px 0;align-items:center}.packet-device{padding:18px 12px;border:2px solid #d6e3dc;border-radius:10px;background:white;text-align:center;min-width:0}.packet-device strong,.packet-device span,.packet-device small,.packet-device code{display:block}.packet-device span{font-size:12px;color:var(--muted)}.packet-device code{font-size:11px;overflow-wrap:anywhere}.packet-device small{font-size:10px;margin-top:4px}.switch-device{background:var(--ink);color:white}.switch-device span{color:#bdd4ce}.observer-device{grid-column:3;border-style:dashed}.packet-active{border-color:var(--teal);box-shadow:0 0 0 3px #07807922;background:#eaf7ed}.switch-device.packet-active{background:#185746}.packet-story{border-left:3px solid var(--teal);padding:12px 18px;background:white;border-radius:6px;min-height:230px;margin:20px 0}.packet-story p{font-size:14px}.packet-story .eyebrow{font-size:10px}.frame-info{font-family:monospace;font-size:12px;overflow-wrap:anywhere;color:var(--teal);padding-top:8px;border-top:1px solid var(--border)}.packet-tables{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}button:disabled{opacity:.45;cursor:default}#subnetTask>label{font-size:13px;font-weight:600}#arpTask{margin-top:28px}#arp details{margin-top:24px}@media(max-width:800px){.packet-tables{grid-template-columns:1fr}.packet-map{gap:8px}.packet-device{padding:12px 6px}.packet-device code{font-size:9px}}@media(max-width:650px){nav a[href="#subnet"],nav a[href="#arp"]{max-width:125px;white-space:normal;line-height:1.3}.packet-map{grid-template-columns:1fr}.observer-device{grid-column:auto}.workshop>label{flex-wrap:wrap;gap:12px}.packet-story{min-height:0}.packet-device code{font-size:12px}.subnet-strip{gap:2px}.subnet-strip div{font-size:9px}.packet-tables td{font-size:11px}}

/* Responsive navigation and touch-friendly workshops, including tablets. */
.lesson,.workshop,.course-card,.contact-panel>div,.octets>div,.stats>div,.packet-tables>div{min-width:0}
.route-path{flex-wrap:wrap}
.subnet-strip{flex-wrap:wrap}
.subnet-strip div{min-width:44px}
.contact-panel input,.contact-panel textarea{font-size:16px}
.small-button,.text-button,summary{min-height:44px}
summary{padding:10px 0}
.text-button{padding:8px 0}
fieldset label,.router-toggle{min-height:44px;cursor:pointer}
input[type=checkbox],input[type=radio]{min-width:20px;min-height:20px;flex-shrink:0}
input[type=range]{min-height:44px}
.bit{height:44px}
.octets{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:1100px){
  aside{position:static;inset:auto;width:100%;padding:20px max(24px,env(safe-area-inset-left));display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:24px;overflow:visible}
  aside nav,.aside-label,.aside-bottom{display:none}
  .mobile-course-select{display:block;width:100%;max-width:540px;justify-self:end;margin:0;padding:12px;background:#21414b;color:white;border:1px solid #587880;border-radius:7px;font:16px 'DM Sans',Segoe UI,sans-serif;min-height:48px}
  main{margin-left:0;padding:26px 4% 0;max-width:none}
  .hero{grid-template-columns:1.15fr 1fr;padding:40px 0;gap:28px}
  h1{font-size:clamp(36px,5.5vw,58px)}
  .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lesson{padding:26px}
  .device input,.device select,.workshop select,.answer-input{font-size:16px;min-height:44px}
  .lesson-pager>a{display:inline-flex;align-items:center;min-height:44px}
}
@media(max-width:800px){
  .octets{grid-template-columns:1fr}
  .contact-panel{grid-template-columns:1fr;gap:20px}
  .section-heading{align-items:flex-start;flex-wrap:wrap}
  .hero{grid-template-columns:1fr}
  .hero-art{min-height:250px}
  .topology{grid-template-columns:1fr;gap:0}
  .connection{height:18px;width:2px}
  .switch{padding:12px}
}
@media(max-width:600px){
  aside{grid-template-columns:1fr;gap:14px;padding:18px max(16px,env(safe-area-inset-left))}
  .mobile-course-select{max-width:none}
  main{padding:20px max(16px,env(safe-area-inset-left)) 0}
  .course-grid{grid-template-columns:1fr}
  .lesson{padding:18px}
  .workshop{padding:12px}
  .bits{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
  .bits span{font-size:12px}
  .workshop-top{flex-wrap:wrap;font-size:11px}
  .lab-actions>*{max-width:100%}
  .lab-actions .small-button{flex:1}
  .lesson-pager{justify-content:center;flex-wrap:wrap}
  .dora-track{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .dora-track span{font-size:13px}
  .big-address{font-size:30px}
  header{letter-spacing:.6px}
  .footer-line{display:block}
}
@media(max-width:380px){
  .stats{grid-template-columns:1fr}
  .lesson{padding:14px}
  h1{font-size:36px}
  .lease-card dl{grid-template-columns:1fr;gap:4px}
  .lease-card dd{margin-bottom:10px}
}

@media(min-width:801px) and (max-width:1300px){.octets{grid-template-columns:1fr}}
.switch-port-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0}.switch-guess{display:grid;grid-template-columns:1fr 1fr;gap:8px}.switch-guess label{display:flex;align-items:center;gap:8px;min-height:44px}.switch-console{background:#102b36;color:#d8f58c;padding:18px;border-radius:8px;overflow:auto;max-width:100%;font:13px/1.8 monospace;min-height:130px}nav a[href="#switch"]{font-size:12px}@media(max-width:1100px){.switch-port-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.switch-port-grid{grid-template-columns:1fr}}

.contact-panel{grid-template-columns:1fr}.contact-panel>div{max-width:650px}
.lesson-guide{margin:24px 0;color:var(--ink);font-size:16px;line-height:1.8}.lesson-guide>p,.lesson-guide>h3,.lesson-guide>.guide-depth,.guide-reflection>p{max-width:75ch}.learning-goal{padding:14px 18px;background:#edf5f2;border-radius:8px;border:1px solid #d0e4dc}.worked-example{margin:24px 0;padding:22px 24px;border:1px solid #d0dfd9;border-left:4px solid var(--teal);border-radius:8px;background:#f7faf8}.worked-example p,.worked-example li{max-width:75ch}.worked-example li{margin:10px 0}.lesson-guide code,.guide-reflection code{font-size:.94em;overflow-wrap:anywhere}.guide-depth{margin:20px 0}.guide-misconception{padding:14px 18px;background:#fff7e8;border-left:3px solid #c69d56;border-radius:6px}.guide-instruction{margin:22px 0}.guide-reflection{margin:28px 0 0;padding:12px 18px;background:#edf5f2;border:1px solid var(--border);border-radius:9px;font-size:15px}.study-intro{max-width:80ch;margin:24px 0;line-height:1.8}.study-intro p{color:var(--muted)}@media(max-width:600px){.worked-example{padding:16px}.worked-example ol{padding-left:22px}.learning-goal,.guide-misconception,.guide-reflection{padding:12px}.lesson-guide h3{font-size:20px}}
.guide-jump{margin:0 0 18px}.lesson .workshop,.lesson .topology,.lesson form,.lesson .service-config{scroll-margin-top:25px}
.header-meta{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:8px;min-width:0}.site-updated{font-size:12px;letter-spacing:0;color:var(--muted);text-align:right;line-height:1.5}.site-version{display:block;font-size:11px;color:var(--teal)}@media(max-width:650px){header{flex-wrap:wrap}header>span:first-child{max-width:100%}.header-meta{width:100%;flex-direction:row;justify-content:space-between;align-items:center;gap:12px}.site-updated{font-size:12px}.site-version{margin:0}}
.port-topology{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin:24px 0}.port-state{padding:14px;background:#eaf2ee;border-radius:8px;overflow-wrap:anywhere;font-size:14px}.port-checklist{display:grid;gap:8px;margin:20px 0;font-size:14px}.port-check-done{color:var(--teal);font-weight:600}.port-practice{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:22px;margin:28px 0}.port-practice>div{min-width:0}.port-command-card{padding:10px 0;border-bottom:1px solid var(--border)}.port-command-card code{display:block;overflow-wrap:anywhere;font-size:13px;color:var(--teal)}.port-command-card span{display:block;font-size:12px;color:var(--muted)}#portConsole{height:320px;white-space:pre-wrap;overflow-wrap:anywhere}#portCommand{max-width:none;font-size:16px}#portPrompt{font:600 15px monospace}nav a[href="#portconfig"]{font-size:12px}@media(max-width:900px){.port-practice{grid-template-columns:1fr}.port-topology{grid-template-columns:1fr}}
.stp-controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;margin:24px 0;align-items:center}.stp-controls>div{min-width:0}.stp-controls label{display:block;font-size:13px;margin-bottom:8px}.stp-controls select{width:100%;font-size:16px;min-height:44px}.stp-diagram{width:100%;max-width:720px;display:block;margin:15px auto}.stp-diagram line{stroke-width:5}.stp-forward{stroke:#087f78}.stp-discard{stroke:#b77717;stroke-dasharray:10 7}.stp-down{stroke:#a0aaa9;stroke-dasharray:3 8}.stp-diagram rect{fill:#153440;stroke:#bdd3ca;stroke-width:2}.stp-diagram text{text-anchor:middle;fill:#d8f58c;font:600 18px 'Space Grotesk',sans-serif}.stp-diagram .stp-node-note{fill:white;font:13px 'DM Sans',sans-serif}.stp-diagram .stp-link-note{fill:#805117;font:14px 'DM Sans',sans-serif}.stp-legend{font-size:13px;color:var(--muted)}.stp-stats{grid-template-columns:repeat(3,minmax(0,1fr))}#stpMission{margin-top:20px}nav a[href="#stp"]{font-size:12px}@media(max-width:800px){.stp-controls{grid-template-columns:1fr}}@media(max-width:600px){.stp-stats{grid-template-columns:1fr}.stp-diagram text{font-size:21px}.stp-diagram .stp-node-note{font-size:16px}.stp-diagram .stp-link-note{font-size:16px}}
.lacp-controls{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}.lacp-controls>div{min-width:0}.lacp-controls label{display:block;font-size:13px;margin-bottom:6px}.lacp-controls select{width:100%;font-size:16px;min-height:44px}.lacp-map{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center;margin:24px 0}.lacp-map>strong{background:var(--ink);color:var(--lime);padding:18px;border-radius:9px}.lacp-wire{padding:8px;margin:12px 0;text-align:center;border:2px dashed #a0aaa9;border-radius:8px;font-size:13px}.lacp-live{border:3px solid var(--teal);background:#eaf4ef}.lacp-inactive{color:var(--muted)}nav a[href="#lacp"]{font-size:12px}@media(max-width:650px){.lacp-controls{grid-template-columns:1fr}.lacp-map{grid-template-columns:1fr;text-align:center}.lacp-wire{margin:8px 0}}

.iv-topology{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}.iv-topology>div{padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--soft)}#ivJourney li{margin:12px 0}nav a[href='#intervlan']{font-size:12px}@media(max-width:650px){.iv-topology{grid-template-columns:1fr}}