:root{font-family:'DM Sans',system-ui,sans-serif;color:#343434;background:#f4f4f4;font-size:14px;--teal:#575757;--line:#e7e7e7}*{box-sizing:border-box}body{margin:0;display:flex;min-height:100vh}button,select,input{font:inherit}button,select{cursor:pointer}button{border:1px solid var(--line);background:white;border-radius:7px;padding:9px 12px;color:inherit}button:hover{filter:brightness(.96)}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #878787;outline-offset:3px}.sidebar{width:258px;flex-shrink:0;background:#1f1f1f;color:#ededed;padding:29px 21px;display:flex;flex-direction:column}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;color:white;font-weight:700;letter-spacing:1.2px;font-size:13px;margin-bottom:53px}.brand small{display:block;color:#a3a3a3;font-size:9px;letter-spacing:.5px;margin-top:5px}.brand-icon{background:#454545;border:1px solid #656565;color:#cecece;font-size:27px;border-radius:10px;width:40px;height:40px;text-align:center;line-height:40px}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:700;color:#939393}.sidebar h1{font-size:34px;line-height:1.19;letter-spacing:-1px;margin:13px 0}.sidebar h1 span{color:#b4b4b4}.intro{font-size:12px;line-height:1.7;color:#a9a9a9;margin:0 0 34px}.scenarios-label{display:flex;justify-content:space-between;margin-bottom:12px}nav{display:flex;flex-direction:column;gap:6px}nav button{text-align:left;color:#b6b6b6;background:none;border:1px solid transparent;padding:12px 10px;display:flex;gap:10px;line-height:1.4;font-size:12px}nav button.active{background:#323232;border-color:#505050;color:white}nav button small{display:block;color:#989898;font-size:10px;margin-top:3px}nav .index{border:1px solid #555555;border-radius:5px;min-width:24px;height:24px;text-align:center;padding:3px;font-size:10px}nav button.active .index{border-color:#b0b0b0;color:#b0b0b0}.sidebar-footer{margin-top:auto;padding-top:45px;font-size:10px;color:#a2a2a2;line-height:2}.sidebar-footer small{font-size:9px;color:#868686}.dot,.online i{width:6px;height:6px;border-radius:100%;background:#ababab;display:inline-block;margin-right:5px}main{flex:1;min-width:0;padding:0 32px;max-width:1800px}header{display:flex;justify-content:space-between;align-items:center;padding:25px 0;border-bottom:1px solid #e3e3e3;gap:15px}.breadcrumb{margin-top:7px;font-size:12px;font-weight:600}.breadcrumb span:first-child{color:#afafaf;margin:0 9px}.header-actions{display:flex;align-items:center;gap:12px}select{padding:8px;border:1px solid #dedede;border-radius:6px;background:transparent;font-size:12px}.timer{font-family:'IBM Plex Mono',monospace;font-size:17px;color:#575757;background:#eaeaea;border-radius:5px;padding:8px}.subtle{background:transparent;font-size:11px}.hero{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 0 24px}.tag{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--teal);font-weight:700}.hero h2{font-size:29px;margin:10px 0;letter-spacing:-1px;color:#272727}.hero p{font-size:12px;max-width:630px;line-height:1.75;margin:0;color:#828282}.primary{background:#575757;color:white;border:none;font-size:12px;white-space:nowrap;padding:13px 16px;box-shadow:0 4px 10px #57575718}.primary span{margin-left:16px}.workspace{display:grid;grid-template-columns:minmax(270px, .85fr) minmax(400px,1.55fr);gap:20px;align-items:start}.panel{background:#ffffff;border:1px solid #e4e4e4;border-radius:11px;overflow:hidden;box-shadow:0 3px 8px #2c2c2c04}.panel-title{display:flex;justify-content:space-between;align-items:center;padding:17px 20px;border-bottom:1px solid var(--line)}h3{font-size:13px;margin:0}.badge{font-size:9px;background:#f2f2f2;padding:5px 7px;border-radius:4px;color:#868686}.topology{margin:18px 16px;border:1px solid #eaeaea;border-radius:8px;background:radial-gradient(#d9d9d9 1px,transparent 1px);background-size:12px 12px;position:relative;padding:22px 12px;display:flex;align-items:center;justify-content:center;gap:12px}.node{text-align:center;background:white;border:1px solid #cacaca;border-radius:8px;padding:9px;min-width:70px;cursor:pointer;box-shadow:0 2px 3px #2525250a}.node.selected{border-color:var(--teal);box-shadow:0 0 0 2px #5757571a}.node b{display:block;font-size:11px}.node .symbol{font-size:22px;color:var(--teal)}.wire{height:1px;flex:1;background:#b6b6b6;position:relative;min-width:25px}.wire span{position:absolute;bottom:7px;left:50%;transform:translateX(-50%);font-size:8px;color:#8c8c8c;white-space:nowrap}details{margin:0 19px 20px}summary{font-size:11px;font-weight:600;cursor:pointer;color:#616161}pre{font-family:'IBM Plex Mono',monospace;white-space:pre-wrap;font-size:10px;line-height:1.8}#addresses{color:#7b7b7b;background:#f8f8f8;padding:12px;border-radius:5px;margin-bottom:0}.requirements{padding:0 20px}ol{list-style:none;counter-reset:task;padding:0 20px;margin:10px 0 18px}ol li{counter-increment:task;display:flex;font-size:12px;line-height:1.7;padding:9px 0;border-bottom:1px solid #f3f3f3}ol li:before{content:counter(task,decimal-leading-zero);font-size:10px;color:#838383;margin-right:12px;padding-top:2px}.hint-actions{display:flex;gap:8px;padding:0 20px 20px}.hint-actions button{font-size:10px}.hint{margin:0 20px 20px;padding:12px;font-size:12px;line-height:1.7;background:#f3f3f3;border:1px solid #dddddd;border-radius:6px}.terminal-panel{background:#181818;color:#e3e3e3;border-color:#2e2e2e}.terminal-heading{background:#242424;display:flex;justify-content:space-between;align-items:center;padding-right:17px;border-bottom:1px solid #3a3a3a}.device-tabs{display:flex}.device-tabs button{background:none;border:0;color:#999999;border-radius:0;padding:17px 21px;font:12px 'IBM Plex Mono',monospace;border-bottom:2px solid transparent}.device-tabs button.active{color:#bababa;border-bottom:2px solid #bababa;background:#2f2f2f}.online{font-size:8px;letter-spacing:1.5px;color:#a4a4a4}.console-tools{display:flex;align-items:center;gap:9px;padding:11px 16px;border-bottom:1px solid #282828;color:#878787;font-size:9px}.console-tools span{margin-right:auto}.console-tools button{padding:4px 6px;font-size:9px;color:#b0b0b0;background:none;border-color:#383838}.console{height:490px;overflow:auto;padding:18px;cursor:text;font:12px/1.75 'IBM Plex Mono',Consolas,monospace;scrollbar-color:#494949 #181818}.console #output{white-space:pre-wrap;overflow-wrap:anywhere;color:#bebebe}.console .cmd-line{color:#ececec}.console .welcome{color:#969696}.console .response{margin-bottom:9px}.input-row{display:flex;gap:6px;align-items:baseline;color:#bdbdbd}#command{background:none;border:none;outline:none;color:#efefef;min-width:50px;flex:1;font:inherit;padding:0;caret-color:#bdbdbd}#prompt{white-space:nowrap}.terminal-footer{display:flex;justify-content:space-between;gap:10px;padding:12px 15px;border-top:1px solid #353535;font-size:9px;color:#8d8d8d}kbd{font:9px 'IBM Plex Mono',monospace;padding:2px 4px;border:1px solid #414141;border-radius:3px;color:#b9b9b9;margin-right:3px}.bottom-note{display:flex;gap:16px;margin:23px 0 20px;border:1px solid #e4e4e4;background:#eeeeee;border-radius:8px;padding:17px;color:#808080}.bottom-note>span{font-size:23px;color:var(--teal)}.bottom-note strong{font-size:11px;color:#626262}.bottom-note p{font-size:10px;line-height:1.8;margin:5px 0 0;max-width:1000px}footer{display:flex;justify-content:space-between;color:#9b9b9b;font-size:9px;padding-bottom:25px}footer a{color:#7f7f7f}#result{padding:16px 20px;border-top:1px solid var(--line);background:#f9f9f9}#result h3{margin-bottom:10px}.check{font-size:11px;line-height:1.8;margin:5px 0;color:#797979}.check.pass{color:#525252}.check.fail{color:#707070}dialog{border:1px solid #d9d9d9;border-radius:12px;max-width:700px;width:90%;padding:23px;color:#393939}dialog::backdrop{background:#202020a3}.modal-head{display:flex;align-items:center;justify-content:space-between}dialog p{font-size:12px;line-height:1.7;color:#7f7f7f}dialog pre{background:#181818;color:#dcdcdc;padding:18px;border-radius:7px;max-height:60vh;overflow:auto}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#353535;color:#f5f5f5;padding:12px 22px;border-radius:7px;font-size:12px;display:none;box-shadow:0 5px 25px #2e2e2e40}@media(min-width:1600px){.console{height:580px}}@media(max-width:1100px){.sidebar{width:220px;padding:25px 16px}main{padding:0 20px}.workspace{grid-template-columns:1fr}.hero{align-items:start}.console{height:400px}.task-panel .topology{max-width:400px}header{flex-wrap:wrap}.sidebar h1{font-size:29px}}@media(max-width:650px){body{display:block}.sidebar{width:auto;padding:18px}.brand{margin-bottom:17px}.sidebar h1,.sidebar .intro,.sidebar>.eyebrow,.sidebar-footer{display:none}nav{flex-direction:row;overflow-x:auto}nav button{min-width:180px}.sidebar nav button small{display:none}main{padding:0 14px}header{padding:18px 0}.hero{flex-direction:column}.hero h2{font-size:26px}.header-actions{gap:8px}.workspace{display:block}.terminal-panel{margin-top:18px}.console{height:410px;padding:12px;font-size:11px}.terminal-footer{font-size:8px}.terminal-footer>span:last-child{display:none}footer{flex-direction:column;gap:10px}.primary{align-self:stretch}#mode{max-width:150px}}

:root{--teal:#111;--line:#ddd;color:#222;background:#fafafa}.sidebar{background:#111;color:#eee}.brand-icon{background:#222;border-color:#777;color:#fff}.sidebar h1 span{color:#fff}nav button.active{background:#333;border-color:#888}nav button.active .index{color:#fff;border-color:#fff}.primary{background:#111;box-shadow:none}.terminal-panel,.console,dialog pre{background:#080808}.terminal-heading{background:#191919}.device-tabs button.active{color:#fff;border-color:#fff;background:#292929}.console .welcome,.input-row{color:#ddd}#command{caret-color:#fff}.check.pass{color:#111;font-weight:600}.check.fail{color:#666}.hint{background:#f1f1f1;border-color:#ccc}.sidebar{position:sticky;top:0;height:100vh;overflow:auto}.brand{margin-bottom:28px}.sidebar h1{font-size:30px}.intro{margin-bottom:22px}nav button{padding:10px 8px}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline-color:#888}#command:focus-visible{outline:1px solid #777;outline-offset:4px}@media(max-width:650px){.sidebar{position:static;height:auto;overflow:visible}}

[hidden]{display:none!important}.objective-details p,details #guidelines{font-size:11px;line-height:1.7;color:#555}.objective-details a{font-size:11px;color:#222;line-height:2}#wireless{background:#fafafa;color:#111;padding:22px;min-height:490px}.wlc-title{font-weight:700;font-size:15px}.wlc-note{font-size:11px;line-height:1.6;color:#555}#wlanForm{display:grid;gap:14px;max-width:540px}#wlanForm label{display:grid;gap:6px;font-size:12px}#wlanForm input,#wlanForm select{padding:9px;border:1px solid #aaa;background:white;color:#111;border-radius:4px;width:100%}#wlanForm fieldset{border:1px solid #ccc;padding:14px;display:grid;gap:12px}#wlanForm legend{font-size:12px}#wlanForm .wlc-check{display:flex;align-items:center}#wlanForm input[type=checkbox]{width:auto}.wlc-actions{display:flex;gap:10px;flex-wrap:wrap}.wlc-actions button:first-child{background:#111;color:white}#wlanStatus{font-size:12px;line-height:1.6}.topology{flex-wrap:wrap}.topology .wire{max-width:120px}
.back-home{text-decoration:none;color:#555}.next-lab{display:block;margin-top:14px;border-top:1px solid #ccc;padding-top:13px;color:#111;font-size:12px;font-weight:600;text-decoration:none}
