:root{
  --bg:#08101f;--bg2:#0d1729;--surface:#101c30;--surface2:#15243b;--surface3:#1a2c47;
  --text:#f4f7fb;--muted:#91a0b7;--line:#223450;--accent:#66a6ff;--accent2:#7b8cff;
  --good:#3ddc97;--warn:#ffbd4a;--bad:#ff667c;--cyan:#4ad7e8;--purple:#a783ff;--orange:#ff9a55;
  --shadow:0 16px 44px rgba(0,0,0,.22);--radius:22px;--safe:env(safe-area-inset-bottom,0px)
}
:root[data-theme="light"]{
  --bg:#f2f6fb;--bg2:#eaf0f7;--surface:#ffffff;--surface2:#f7f9fc;--surface3:#edf3fa;
  --text:#152238;--muted:#66758b;--line:#dbe4ef;--shadow:0 12px 30px rgba(31,55,87,.09)
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 90% -10%,rgba(102,166,255,.12),transparent 34%),var(--bg);color:var(--text);font:15px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;padding-bottom:calc(86px + var(--safe))}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{max-width:980px;margin:0 auto;padding:18px}.topbar{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--bg) 84%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent)}.topbar-in{max-width:980px;height:64px;margin:auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:linear-gradient(145deg,#5b9cff,#7c73ff);box-shadow:0 8px 20px rgba(91,156,255,.25);font-weight:900;color:#fff}.brand b{display:block;font-size:15px;letter-spacing:.08em}.brand small{display:block;color:var(--muted);font-size:10px;margin-top:-2px}.top-actions{display:flex;gap:8px;align-items:center}.icon-btn,.avatar{width:38px;height:38px;border-radius:13px;border:1px solid var(--line);background:var(--surface);color:var(--text);display:grid;place-items:center}.icon-btn{cursor:pointer}.avatar{font-weight:800;font-size:13px}.welcome{padding:26px 2px 16px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.15em;color:var(--accent);text-transform:uppercase}.welcome h1,.page-intro h1,.article-hero h1{margin:5px 0 8px;font-size:clamp(32px,8vw,52px);line-height:1.02;letter-spacing:-.045em}.welcome p,.page-intro p,.article-hero p{margin:0;color:var(--muted);max-width:680px;font-size:16px}.big-search{display:flex;align-items:center;gap:13px;background:linear-gradient(135deg,var(--surface2),var(--surface));border:1px solid var(--line);box-shadow:var(--shadow);padding:16px;border-radius:20px;margin:8px 0 18px}.big-search>span{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:rgba(102,166,255,.13);color:var(--accent);font-size:24px}.big-search div{min-width:0;flex:1}.big-search b{display:block;font-size:16px}.big-search small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.big-search i,.guide-row i,.knowledge-card i,.state-card i{font-size:28px;color:var(--muted);font-style:normal}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.quick{position:relative;min-height:132px;padding:16px;border:1px solid var(--line);border-radius:20px;background:var(--surface);overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end}.quick:before{content:"";position:absolute;width:92px;height:92px;right:-24px;top:-28px;border-radius:50%;background:currentColor;opacity:.09}.quick>span{position:absolute;top:14px;left:15px;width:38px;height:38px;border-radius:13px;display:grid;place-items:center;background:color-mix(in srgb,currentColor 14%,transparent);font-size:21px}.quick b{font-size:16px}.quick small{color:var(--muted)}.q-red{color:var(--bad)}.q-green{color:var(--good)}.q-blue{color:var(--accent)}.q-purple{color:var(--purple)}.q-orange{color:var(--orange)}.q-cyan{color:var(--cyan)}.quick b,.quick small{color:var(--text)}.quick small{opacity:.62}.section-block{margin:30px 0}.section-title{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:12px}.section-title span{font-size:10px;font-weight:800;letter-spacing:.13em;color:var(--muted)}.section-title h2{font-size:21px;margin:1px 0 0;letter-spacing:-.025em}.section-title>a{color:var(--accent);font-weight:700;font-size:13px}.guide-list,.diag-list{border:1px solid var(--line);border-radius:20px;background:var(--surface);overflow:hidden}.guide-row,.diag-row{min-height:72px;padding:12px 14px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line)}.guide-row:last-child,.diag-row:last-child{border-bottom:0}.guide-icon{width:42px;height:42px;border-radius:14px;background:var(--surface3);display:grid;place-items:center;font-size:21px;flex:none}.guide-row div,.diag-row div{flex:1;min-width:0}.guide-row b,.diag-row b{display:block;font-size:15px}.guide-row small,.diag-row small{display:block;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.status{font-size:11px;font-weight:800;border-radius:999px;padding:5px 8px;white-space:nowrap}.status.ok{color:var(--good);background:rgba(61,220,151,.1)}.status.warn{color:var(--warn);background:rgba(255,189,74,.1)}.status.bad{color:var(--bad);background:rgba(255,102,124,.1)}.status.muted{color:var(--muted);background:var(--surface3)}.empty-card{text-align:center;padding:30px 18px;border:1px dashed var(--line);border-radius:20px;color:var(--muted)}.empty-card>span{font-size:30px}.empty-card b{display:block;color:var(--text);margin-top:8px}.empty-card p{margin:4px auto 0;max-width:420px}.compact-info{display:flex;align-items:center;gap:10px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:17px}.compact-info b{white-space:nowrap}.compact-info span{color:var(--muted);font-size:13px}.page-intro{padding:26px 2px 18px}.page-intro h1{font-size:clamp(30px,7vw,46px)}.search-wrap{position:sticky;top:76px;z-index:30;display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:4px 10px;box-shadow:var(--shadow)}.search-wrap>span{font-size:24px;color:var(--accent)}.search-wrap input{min-width:0;flex:1;border:0;background:transparent;color:var(--text);font-size:17px;outline:none;padding:12px 2px}.search-wrap button{border:0;background:var(--surface3);color:var(--muted);width:32px;height:32px;border-radius:11px;cursor:pointer}.chips{display:flex;gap:8px;overflow:auto;padding:13px 1px 7px;scrollbar-width:none}.chips::-webkit-scrollbar{display:none}.chip{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:999px;padding:8px 12px;white-space:nowrap;cursor:pointer}.chip.active{background:var(--accent);border-color:var(--accent);color:#07111f;font-weight:800}.search-count{font-size:12px;color:var(--muted);padding:4px 2px 8px}.knowledge-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}.knowledge-card{min-height:112px;background:var(--surface);border:1px solid var(--line);border-radius:19px;padding:13px;display:flex;gap:11px;align-items:flex-start}.knowledge-icon{width:42px;height:42px;display:grid;place-items:center;flex:none;border-radius:14px;background:var(--surface3);font-size:20px}.knowledge-card div{min-width:0;flex:1}.knowledge-card div>small{display:block;font-size:10px;font-weight:800;letter-spacing:.09em;color:var(--accent);text-transform:uppercase}.knowledge-card b{display:block;font-size:15px;margin:2px 0 4px}.knowledge-card p{margin:0;color:var(--muted);font-size:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.knowledge-card i{align-self:center}.no-results{text-align:center;padding:50px 20px;color:var(--muted)}.no-results span{font-size:36px}.no-results b{display:block;color:var(--text);margin:8px}.article-page{max-width:760px}.back-link{display:inline-block;margin-top:18px;color:var(--muted);font-weight:700}.article-hero{padding:20px 0 18px}.article-big-icon{width:58px;height:58px;border-radius:18px;background:var(--surface2);display:grid;place-items:center;font-size:29px;margin-bottom:14px;border:1px solid var(--line)}.article-hero h1{font-size:clamp(31px,8vw,48px)}.callout{padding:16px 17px;border-radius:18px;margin:4px 0 16px;border:1px solid var(--line);background:var(--surface)}.callout b{display:block;margin-bottom:3px}.callout p{margin:0;color:var(--muted)}.callout.danger{border-color:rgba(255,102,124,.32);background:rgba(255,102,124,.08)}.callout.warning{border-color:rgba(255,189,74,.34);background:rgba(255,189,74,.08)}.callout.good{border-color:rgba(61,220,151,.3);background:rgba(61,220,151,.07)}.steps-card,.info-card,.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:17px;margin:14px 0}.steps{list-style:none;padding:0;margin:0}.steps li{position:relative;display:flex;gap:13px;padding:14px 0;border-bottom:1px solid var(--line)}.steps li:last-child{border-bottom:0;padding-bottom:3px}.steps li>span{width:30px;height:30px;border-radius:10px;background:rgba(102,166,255,.12);color:var(--accent);display:grid;place-items:center;flex:none;font-weight:900}.steps li>div{padding-top:4px}.info-card h2{font-size:18px;margin:0 0 10px}.check-row{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line)}.check-row:last-child{border-bottom:0}.check-row span{color:var(--muted)}.check-row b{text-align:right}.note-list{margin:0;padding-left:20px}.note-list li{margin:9px 0;color:var(--muted)}.tags{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0 30px}.tags span{font-size:11px;padding:6px 9px;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--muted)}.onu-visual{margin:2px 0 16px;background:linear-gradient(145deg,#eef1f5,#cfd5dc);color:#28303b;border-radius:22px;padding:23px 24px;box-shadow:var(--shadow)}.onu-name{font-weight:900;letter-spacing:.12em;font-size:11px;margin-bottom:20px}.led-line{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:800}.led-line span{margin-right:12px}.led,.state-led,.dot{display:inline-block;border-radius:50%;background:#8a94a1}.led{width:11px;height:11px;box-shadow:0 0 0 3px rgba(0,0,0,.08)}.led.red,.state-led.red,.dot.red{background:#ff405e;box-shadow:0 0 13px rgba(255,64,94,.7)}.led.green,.state-led.green,.dot.green{background:#2aca82;box-shadow:0 0 13px rgba(42,202,130,.65)}.led.dim{opacity:.45}.state-led.amber{background:#ffad32;box-shadow:0 0 13px rgba(255,173,50,.65)}.state-led.off,.dot.dark{background:#5f6978;box-shadow:inset 0 0 0 2px rgba(255,255,255,.06)}.pulse{animation:pulse 1.1s infinite}@keyframes pulse{50%{opacity:.24;box-shadow:none}}.state-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.state-card{min-height:93px;padding:14px;background:var(--surface);border:1px solid var(--line);border-radius:19px;display:flex;align-items:center;gap:12px}.state-card>div{flex:1}.state-card b{display:block}.state-card small{display:block;color:var(--muted);font-size:12px;margin-top:2px}.state-led{width:15px;height:15px;flex:none}.logic-list{border:1px solid var(--line);background:var(--surface);border-radius:20px;overflow:hidden}.logic-list>div{display:flex;gap:12px;align-items:center;padding:14px;border-bottom:1px solid var(--line)}.logic-list>div:last-child{border-bottom:0}.dot{width:12px;height:12px;flex:none}.logic-list b{display:block}.logic-list small{color:var(--muted)}.tool-card{padding:18px}.tool-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}.tool-head>span{width:44px;height:44px;border-radius:14px;background:var(--surface3);display:grid;place-items:center;color:var(--accent);font-weight:900}.tool-head small{font-size:10px;font-weight:800;letter-spacing:.12em;color:var(--muted)}.tool-head h2{font-size:20px;margin:0}.tool-card>p{color:var(--muted)}.calc-row{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:end}.calc-row label{font-size:11px;color:var(--muted);font-weight:700}.calc-row input{display:block;width:100%;margin-top:5px;background:var(--bg2);color:var(--text);border:1px solid var(--line);border-radius:13px;padding:12px;outline:none}.calc-row>span{padding-bottom:12px}.calc-result{margin-top:12px;border-radius:14px;background:var(--surface3);padding:13px;text-align:center;font-weight:800}.fiber-pair{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;text-align:center}.fiber-pair div{background:var(--surface2);border-radius:15px;padding:12px}.fiber-pair b,.fiber-pair span{display:block}.fiber-pair span{color:var(--muted);font-size:12px}.fiber-pair i{font-size:11px;color:var(--muted);font-style:normal}.mini-note{margin-top:12px;padding:11px 12px;border-radius:13px;background:var(--surface3);color:var(--muted);font-size:13px}.pair-strip{display:grid;grid-template-columns:repeat(8,1fr);gap:4px}.pair-strip span{aspect-ratio:1;border-radius:8px;background:var(--surface3);display:grid;place-items:center;font-size:12px;font-weight:800}.tool-copy{font-size:13px}.inline-link{display:inline-block;color:var(--accent);font-weight:800;margin-top:5px}.cmd-list>div{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}.cmd-list>div:last-child{border-bottom:0}.cmd-list code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--accent)}.cmd-list small{color:var(--muted);text-align:right}.dhcp-flow{display:flex;align-items:center;justify-content:space-between;gap:5px;overflow:auto}.dhcp-flow span{padding:8px 9px;border-radius:10px;background:var(--surface3);font-size:10px;font-weight:800;white-space:nowrap}.dhcp-flow i{color:var(--muted);font-style:normal}.bottom-nav{position:fixed;left:50%;bottom:10px;transform:translateX(-50%);z-index:80;width:min(94%,520px);height:64px;padding:5px;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(20px);border:1px solid var(--line);border-radius:21px;box-shadow:0 18px 50px rgba(0,0,0,.35);display:grid;grid-template-columns:repeat(5,1fr);padding-bottom:max(5px,var(--safe))}.bottom-nav a{border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);gap:1px}.bottom-nav a>span{font-size:21px;line-height:1}.bottom-nav a small{font-size:9px}.bottom-nav a.active{color:var(--accent);background:rgba(102,166,255,.1)}.login-page{min-height:100vh;display:grid;place-items:center;padding:18px;background:radial-gradient(circle at 50% -10%,rgba(102,166,255,.19),transparent 37%),var(--bg)}.login-card{width:min(100%,420px);background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:var(--shadow)}.login-logo{width:56px;height:56px;border-radius:18px;background:linear-gradient(145deg,#5b9cff,#7c73ff);display:grid;place-items:center;font-size:25px;font-weight:900;color:#fff;margin-bottom:18px}.login-card h1{font-size:30px;margin:0 0 5px;letter-spacing:-.04em}.login-card>p{margin:0 0 20px;color:var(--muted)}.field{display:block;margin:11px 0;color:var(--muted);font-size:12px;font-weight:700}.field input{display:block;width:100%;margin-top:6px;padding:14px;background:var(--bg2);border:1px solid var(--line);border-radius:14px;color:var(--text);outline:none;font-size:16px}.primary-btn{width:100%;border:0;border-radius:14px;background:linear-gradient(135deg,#66a6ff,#7b8cff);color:#07101e;padding:14px;font-weight:900;margin-top:10px;cursor:pointer}.error{background:rgba(255,102,124,.1);border:1px solid rgba(255,102,124,.28);color:#ff98a7;padding:11px 12px;border-radius:13px;margin:12px 0}.diag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}.metric{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:14px}.metric small{display:block;color:var(--muted);font-size:11px}.metric strong{display:block;font-size:20px;margin-top:2px}.show-page{min-height:100vh;padding:34px 18px;background:var(--bg)}.show-card{max-width:720px;margin:auto}.subscriber-head{text-align:center;padding:28px 0}.subscriber-head .big-status{font-size:58px}.subscriber-head h1{font-size:35px;line-height:1.05;margin:8px 0}.subscriber-head p{color:var(--muted)}
@media(hover:hover){.quick:hover,.knowledge-card:hover,.guide-row:hover,.state-card:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}}
@media(max-width:720px){.quick-grid{grid-template-columns:1fr 1fr}.knowledge-list{grid-template-columns:1fr}.state-grid{grid-template-columns:1fr}.diag-grid{grid-template-columns:1fr 1fr}.fiber-pair{grid-template-columns:1fr}.fiber-pair i{padding:2px 0}.cmd-list>div{display:block}.cmd-list small{display:block;text-align:left;margin-top:3px}.compact-info{display:block}.compact-info span{display:block;margin-top:3px}}
@media(max-width:390px){.shell{padding:14px}.topbar-in{padding:0 14px}.quick{min-height:125px;padding:13px}.quick b{font-size:14px}.quick small{font-size:11px}.bottom-nav{width:calc(100% - 18px)}.welcome h1,.page-intro h1{font-size:30px}}

/* v3 field workflow */
.article-section{margin-top:12px}.compact-steps li{padding-top:12px;padding-bottom:12px}.section-note{margin:8px 2px 0;padding:11px 12px;border-radius:13px;background:var(--surface3);color:var(--muted);font-size:13px}.handoff-card{border-color:rgba(255,173,50,.28)}.handoff-title{display:flex;align-items:center;gap:12px;margin-bottom:12px}.handoff-title>span{width:42px;height:42px;border-radius:14px;background:rgba(255,173,50,.12);display:grid;place-items:center;color:#ffad32;font-weight:900}.handoff-title small{display:block;color:var(--muted);font-size:9px;font-weight:900;letter-spacing:.12em}.handoff-title h2{margin:1px 0 0;font-size:18px}.handoff-list{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:7px}.handoff-list li{background:var(--surface3);border-radius:12px;padding:10px 11px;font-size:13px}.handoff-list li:before{content:'✓ ';color:var(--good);font-weight:900}.handoff-note{margin:10px 0 0;color:var(--muted);font-size:12px}.single-calc label{display:block;font-size:11px;color:var(--muted);font-weight:800}.single-calc input{display:block;width:100%;margin-top:6px;background:var(--bg2);color:var(--text);border:1px solid var(--line);border-radius:13px;padding:14px;outline:none;font-size:18px}.calc-result.good{background:rgba(42,202,130,.13);color:#55d99a}.calc-result.warn{background:rgba(255,173,50,.13);color:#ffc15d}.calc-result.bad{background:rgba(255,64,94,.13);color:#ff8296}.mini-checklist{display:grid;grid-template-columns:auto auto auto auto auto auto auto;align-items:center;gap:7px;overflow:auto}.mini-checklist span{width:28px;height:28px;border-radius:9px;background:var(--surface3);display:grid;place-items:center;color:var(--accent);font-weight:900}.mini-checklist b{font-size:12px;white-space:nowrap}.mini-checklist i{font-style:normal;color:var(--muted)}
@media(max-width:520px){.handoff-list{grid-template-columns:1fr}.bottom-nav a small{font-size:8px}.bottom-nav a>span{font-size:19px}}