:root{--navy:#08111f;--teal:#64e5dc;--paper:#f5f6f4;--ink:#202e39;--muted:#4e626d;--line:#d7dedf;--accent:#146a66;--mono:ui-monospace,SFMono-Regular,Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-underline-offset:4px}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #168581;outline-offset:4px}.topbar{background:var(--navy);color:#e9f1f7;padding:20px max(24px,calc((100vw - 1220px)/2));display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid #27384a}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#e9f1f7;letter-spacing:.08em}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--teal);border-radius:11px;color:var(--teal)}.topbar nav{display:flex;gap:26px;font-size:14px}.topbar nav a{color:#c0d0dd;text-decoration:none}.topbar nav a:hover{color:var(--teal)}.masthead{background:var(--navy);color:#e9f1f7;padding:24px max(24px,calc((100vw - 1220px)/2)) 56px}.crumb{display:flex;gap:12px;color:#b6c8d6;font-size:13px;margin-bottom:35px}.crumb a{color:#b6c8d6;text-decoration:none}.eyebrow{color:var(--teal);font:600 12px/1.5 var(--mono);letter-spacing:.1em}h1,h2,h3{line-height:1.2;letter-spacing:-.035em}h1{font-size:clamp(32px,4.8vw,58px);max-width:1100px;margin:20px 0 24px;font-weight:700}h1 span{color:var(--teal)}.intro{font-size:20px;line-height:1.6;color:#c4d3df;max-width:780px}.meta{display:flex;gap:12px 28px;flex-wrap:wrap;color:#becfda;font-size:13px;margin:28px 0}.actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.primary,.actions button{display:inline-block;padding:12px 18px;border-radius:6px;font-size:14px;font-weight:650;text-decoration:none}.primary{background:var(--teal);color:var(--navy)}.actions button{background:transparent;border:1px solid #536878;color:#e9f1f7}.actions button:hover{background:#172738}.lesson-layout{display:grid;grid-template-columns:242px minmax(0,860px);gap:62px;max-width:1270px;padding:44px 25px 80px;margin:auto;align-items:start}aside{position:sticky;top:24px;font-size:13px}aside details{border-bottom:1px solid var(--line);padding-bottom:22px}aside summary{font-size:14px;font-weight:700;cursor:pointer;padding-bottom:15px}aside nav{display:flex;flex-direction:column;gap:4px}aside nav a{display:flex;gap:13px;text-decoration:none;color:var(--muted);padding:7px 8px;border-radius:4px;line-height:1.4}aside nav span{font:11px/1.7 var(--mono);color:var(--accent);min-width:18px}aside nav a:hover,aside nav a.current{background:#e1eae6;color:#173d3b}.aside-note{margin:22px 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strong{display:block;color:#174b48;margin-bottom:5px}.note p{margin:0}.note.warning{background:#fff2d8;border-color:#ad7c28}.note.warning strong{color:#704b17}.topology{display:flex;align-items:center;gap:12px;margin:28px 0;padding:24px 20px;background:#fff;border:1px solid var(--line);border-radius:6px}.topology>div{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px;text-align:center}.topology>div.switch{flex:.7}.topology span{font:10px var(--mono);color:var(--muted);letter-spacing:.08em}.topology strong{font-size:18px;line-height:1.3}.topology small{color:var(--muted);font-size:12px}.topology code{font-size:12px;background:transparent}.topology>b{color:#71938f}.table-scroll{overflow-x:auto;border:1px solid var(--line);background:#fff;margin:25px 0;border-radius:5px}table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.6;text-align:left}caption{text-align:left;padding:15px 18px;font-size:12px;font-weight:650;color:var(--muted);border-bottom:1px solid var(--line)}th{background:#e8eeeb;font-size:13px;font-weight:700;color:#334e50}td,th{padding:13px 18px;vertical-align:top;border-bottom:1px solid #e2e7e4}td:first-child{min-width:160px}tbody tr:last-child td{border-bottom:0}table code{background:transparent;padding:0;font-size:13px}.codebox{margin:24px 0;background:#101d2b;color:#edf4f8;border-radius:6px;overflow:hidden;border:1px solid #263e4d}.codebar{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid #314453;color:#c4d5df;font-size:12px}.codebar span{overflow-wrap:anywhere}.codebar button{background:#213646;border:1px solid #527080;color:#dceaf0;padding:5px 12px;border-radius:4px;font-size:12px;flex-shrink:0}.codebar button:hover{border-color:var(--teal);color:var(--teal)}pre{margin:0;padding:21px 20px;overflow:auto;tab-size:2;line-height:1.8}pre code{font:14px/1.8 var(--mono);color:#edf4f8;background:none;border:0;padding:0;overflow-wrap:normal;white-space:pre}.download{font-size:14px;display:inline-block;margin:-5px 0 10px;font-weight:600}.dora{list-style:none;padding:0;counter-reset:dora;margin:28px 0}.dora li{display:grid;grid-template-columns:128px 1fr;gap:15px;padding:15px 18px;border-top:1px solid var(--line);margin:0}.dora li:last-child{border-bottom:1px solid var(--line)}.dora b{color:var(--accent);font-size:15px}.dora span{font-size:15px}details:not(#contents){border:1px solid var(--line);background:#fff;padding:18px 22px;margin:25px 0;border-radius:5px}summary{cursor:pointer;font-size:15px;font-weight:650;line-height:1.5}details[open]:not(#contents)>summary{margin-bottom:18px}details p{font-size:15px}details p:last-child{margin-bottom:0}.source-note,.small{font-size:13px;color:var(--muted);line-height:1.7}.checklist{background:#fff;border:1px solid var(--line);padding:8px 22px;margin:25px 0 12px;border-radius:5px}.checklist label{display:flex;align-items:baseline;gap:13px;padding:14px 0;line-height:1.5;font-size:15px;border-bottom:1px solid #e2e7e4;cursor:pointer}.checklist label:last-child{border:0}.checklist input{width:17px;height:17px;flex-shrink:0;accent-color:var(--accent)}.checklist label:has(input:checked) span{color:#50665c}.sources li{font-size:15px}footer{border-top:1px solid var(--line);max-width:1220px;margin:auto;display:flex;justify-content:space-between;gap:24px;padding:28px 24px 38px;color:var(--muted);font-size:13px}.skip{position:absolute;left:15px;top:-80px;z-index:50;padding:10px 20px;background:white;color:var(--accent)}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}@media(max-width:1050px){.lesson-layout{grid-template-columns:205px minmax(0,1fr);gap:30px}body{font-size:16px}}@media(max-width:760px){html{scroll-padding-top:20px}.topbar{padding:16px 20px}.brand strong{font-size:15px}.brand-mark{width:33px;height:33px}.topbar 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1fr;padding:14px 0;gap:10px}.dora b,.dora span{font-size:14px}.note{padding:16px 18px}footer{flex-wrap:wrap;padding:25px 20px;font-size:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{body{font-size:10pt;line-height:1.5;background:white;color:black}.topbar,aside,.actions,.codebar button,.skip,footer{display:none}.masthead{background:white;color:black;padding:0}.masthead h1 span,.intro,.meta,.eyebrow,.crumb,.crumb a{color:black}.masthead h1{font-size:26pt}.lesson-layout{display:block;padding:20px 0}.content{max-width:none}.lesson{padding-top:24px}h2{font-size:18pt}h3{font-size:14pt}pre{white-space:pre-wrap;overflow:visible;padding:10px}pre code{white-space:pre-wrap;overflow-wrap:anywhere;color:black;font-size:9pt}.codebox{background:#f2f2f2;color:black;border-color:#ccc;break-inside:avoid}.codebar{color:black;border-color:#ccc}table{font-size:9pt}tr{break-inside:avoid}h2,h3,summary{break-after:avoid}a{color:black}.topology{break-inside:avoid}.note{break-inside:avoid}.crumb{margin-bottom:15px}.goal{padding:14px}.meta{margin:12px 0}}

/* Układy treści istniejących lekcji, zgodne z zadaniem DHCP. */
.codebox.small-panel{padding:0}.code-content{padding:0}.codebox .copy{background:#213646;border:1px solid #527080;color:#dceaf0;padding:5px 12px;border-radius:4px;font-size:12px;flex-shrink:0}.codebox .copy:hover{border-color:var(--teal);color:var(--teal)}.codebar .copy:disabled{opacity:.75}.tabs{display:flex;overflow-x:auto;border-bottom:1px solid #314453;gap:0}.tab{background:#182b3b;color:#c4d5df;font:12px/1.5 var(--mono);padding:14px 16px;border:0;border-bottom:3px solid transparent;white-space:nowrap}.tab.active{border-bottom-color:var(--teal);background:#213646;color:var(--teal)}.code-hint{padding:14px 18px;border-top:1px solid #314453;font-size:13px;line-height:1.7;color:#c4d5df}.code-hint span{color:var(--teal);margin-right:6px}.callout{margin:26px 0;padding:19px 23px;border-left:3px solid #27867e;background:#e7efeb;font-size:15px;display:flex;gap:15px}.callout>span{font:700 15px var(--mono);color:#146a66}.callout p{margin:0}.lesson>p.note{font-size:15px}.two-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0}.info-card{padding:22px;border:1px solid var(--line);background:white;border-radius:5px}.info-card h3{font-size:21px;margin:0 0 15px}.info-card p{margin:0;font-size:15px}.flow{display:flex;align-items:center;gap:15px;justify-content:space-between;padding:22px;border:1px solid var(--line);background:white;border-radius:5px;margin:26px 0}.flow>div{display:flex;flex-direction:column;gap:6px;flex:1}.flow span{font:12px var(--mono);color:var(--accent)}.flow b{font-size:17px}.flow small{font:12px/1.6 var(--mono);color:var(--muted);overflow-wrap:anywhere}.example{margin:38px 0 0;padding-top:26px;border-top:1px solid var(--line)}.example-heading{display:flex;align-items:start;justify-content:space-between;gap:20px}.example-heading h3{margin:8px 0 18px}.example-heading .download{margin:0;white-space:nowrap}.tag{font:11px/1.6 var(--mono);letter-spacing:.05em;color:var(--accent)}.exercise,.next-lesson{padding:24px 26px;border:1px solid #bdcfc7;background:#eaf0eb;border-radius:5px}.exercise .tag{display:block;margin-bottom:15px}.exercise p:last-child{margin-bottom:0}.next-lesson{margin-top:36px}.next-lesson h3{margin:10px 0 15px}.next-lesson p:last-child{margin:0}.procedure{list-style:none;padding:0;counter-reset:procedure}.procedure>li{position:relative;counter-increment:procedure;padding-left:38px;border-left:1px solid var(--line);margin:30px 0}.procedure>li:before{content:counter(procedure);position:absolute;left:-13px;top:0;background:#e7efeb;border:1px solid #aabfba;color:var(--accent);border-radius:50%;width:25px;height:25px;display:grid;place-items:center;font:12px var(--mono)}.procedure h3{margin-top:0}.troubleshooting{align-items:start}.troubleshooting details:not(#contents){margin:0}.topology-card{background:white;border:1px solid var(--line);padding:25px;border-radius:5px}.topology-head h3{margin:8px 0 22px}.topology-head .eyebrow{color:var(--accent)}.status{font:11px var(--mono);color:var(--muted);display:block;margin-bottom:24px}.topology-line{display:flex;gap:20px;align-items:center}.machine{display:flex;gap:15px;flex:1;align-items:center}.machine b,.machine small{display:block}.machine b{font-size:14px}.machine small{font-size:14px;color:var(--muted)}.machine-icon{color:var(--accent);font-size:26px}.wire{flex:.4;text-align:center;color:var(--accent);font:12px var(--mono);border-bottom:1px solid #94aaa5;padding-bottom:10px}.topology-note{margin-top:25px;padding-top:18px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.steps-grid{display:flex;flex-direction:column;gap:22px}.step-card{padding:22px 24px;background:white;border:1px solid var(--line);border-radius:5px}.step-number{font:12px var(--mono);color:var(--accent)}.step-card h3{margin:8px 0 15px}.step-card p:last-child{margin-bottom:0}.mini-code{font:14px/1.9 var(--mono);color:#18524e;background:#e6ece9;border-radius:3px;padding:14px;overflow-wrap:anywhere}.code-wrap{position:relative;background:#101d2b;border:1px solid #263e4d;border-radius:6px;color:#edf4f8}.code-wrap>.copy{position:absolute;right:12px;top:10px;background:#213646;color:#dceaf0;border:1px solid #527080;border-radius:4px;padding:5px 12px;font-size:12px}.code-wrap pre{padding-top:54px}.zone-layout,.verify-grid{display:block}.record-table{margin:26px 0;background:white;border:1px solid var(--line);border-radius:5px;overflow:auto}.record-row{display:grid;grid-template-columns:1fr .5fr 2fr;gap:15px;padding:14px 18px;font:14px/1.6 var(--mono);border-bottom:1px solid var(--line)}.record-row:last-child{border:0}.record-row.head{font-family:inherit;font-weight:650;background:#e8eeeb}.record-row.highlight{background:#eef4ef;color:var(--accent)}.check-list{margin:26px 0}.check-list>div{display:flex;align-items:baseline;gap:15px;padding:13px 0;border-bottom:1px solid var(--line)}.check-list span{font:11px var(--mono);color:var(--accent)}.check-list code{font-size:13px}.terminal{background:#101d2b;border:1px solid #263e4d;border-radius:6px;overflow:hidden;margin:26px 0}.terminal-bar{border-bottom:1px solid #314453;color:#c4d5df;padding:12px 18px;font:12px var(--mono)}.terminal pre b,.terminal .ok{color:var(--teal)}.client-test{padding:22px 24px;border:1px solid #bdcfc7;background:#eaf0eb;border-radius:5px;margin:26px 0}.client-test h3{margin:9px 0 15px}.url-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.url-pills span{font:13px var(--mono);padding:6px 10px;color:#18524e;background:#dce8df;border-radius:4px}.faq-grid{display:block}.sources ul{padding-left:22px}tbody th{background:white;font-size:14px;font-weight:650}pre code:focus-visible{outline-offset:-2px}
@media(max-width:760px){.two-cards{grid-template-columns:1fr}.example-heading{display:block}.example-heading .download{margin:0 0 20px}.flow{padding:15px;gap:8px}.flow b{font-size:14px}.flow small{font-size:10px}.flow span{font-size:10px}.topology-line{flex-direction:column;align-items:stretch}.wire{border:0;text-align:left;padding:5px 0}.machine{width:100%}.topology-card{padding:20px}.record-row{font-size:12px;padding:12px;gap:8px;grid-template-columns:.7fr .5fr 1.8fr}.tab{font-size:11px;padding:13px 12px}.step-card{padding:20px}.check-list code{font-size:11px}.procedure>li{padding-left:25px}.exercise,.next-lesson{padding:20px}.code-wrap pre{padding-top:50px}}
@media print{.code-wrap>.copy{display:none}.code-wrap,.terminal{background:#f2f2f2}.terminal-bar,.code-hint{color:black}.terminal pre b,.terminal .ok{color:black}.tab{background:white;color:black;padding:6px;font-size:9pt}.tab.active{background:#ddd;color:black;border-color:black}.callout{break-inside:avoid}.two-cards{display:block}.info-card{margin-bottom:10px}.step-card,.topology-card{break-inside:avoid}.record-row{font-size:9pt}.exercise,.next-lesson{background:white}.flow{break-inside:avoid}}