:root{
  --bg:#f2f4f7; --card:#fff; --text:#1d2433; --muted:#6b7385; --line:#e3e7ee; --hover:#f7f9fc;
  --side:#18202e; --side-2:#222c3d; --side-text:#b9c2d3; --side-active:#2f6fed;
  --accent:#2f6fed; --accent-2:#1f57c8;
  --good:#1a9f53; --good-bg:#e5f6ec; --warn:#c77700; --warn-bg:#fdf1dc; --bad:#d63a3a; --bad-bg:#fde7e7;
  --gray-bg:#eceff4; --radius:10px; --shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.05);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#0f141c;--card:#171e29;--text:#e4e8f0;--muted:#8d97a9;--line:#273142;--hover:#1c2532;
    --side:#0b1018;--side-2:#151c27;--good-bg:#11301f;--warn-bg:#352812;--bad-bg:#3a1717;--gray-bg:#232c3a;
    --shadow:none}
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:14px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);display:flex;min-height:100vh}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
h1{font-size:22px;margin:0;font-weight:650;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
h2{font-size:15px;margin:0 0 12px;font-weight:650}
h3{margin:0;font-size:15px}
code{font-family:var(--mono);font-size:12px;background:var(--gray-bg);padding:1px 5px;border-radius:4px}
.mono{font-family:var(--mono)} .small{font-size:12px} .muted{color:var(--muted)} .count{font-weight:400;font-size:15px}
.t-bad{color:var(--bad)} .mt{margin-top:22px} .mt-s{margin-top:10px} .right{margin-left:auto}
.ellipsis{max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- sidebar */
.sidebar{width:236px;flex:0 0 236px;background:var(--side);color:var(--side-text);position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:10px;padding:18px 20px;font-weight:700;font-size:16px;color:#fff;letter-spacing:.2px}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#2f6fed,#13b0a5);color:#fff;font-size:15px}
.sidebar nav{padding:6px 10px 20px}
.nav-h{font-size:11px;letter-spacing:1px;color:#6d7891;margin:16px 10px 6px}
.sidebar nav a{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:8px;color:var(--side-text);margin:1px 0}
.sidebar nav a svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linejoin:round;stroke-linecap:round}
.sidebar nav a:hover{background:var(--side-2);color:#fff;text-decoration:none}
.sidebar nav a.active{background:var(--side-active);color:#fff}

/* ---------- main */
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:60px;display:flex;align-items:center;gap:16px;padding:0 24px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.burger{display:none;background:none;border:0;font-size:22px;color:var(--text);cursor:pointer}
.gsearch{position:relative;flex:1;max-width:560px;display:flex;align-items:center}
.gsearch svg{position:absolute;left:12px;width:17px;height:17px;fill:var(--muted)}
.gsearch input{width:100%;padding:9px 12px 9px 38px;border-radius:999px;border:1px solid var(--line);background:var(--bg);color:var(--text);font-size:14px}
.gsearch input:focus{outline:2px solid var(--accent);outline-offset:-1px;background:var(--card)}
.gs-results{position:absolute;top:44px;left:0;right:0;background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(0,0,0,.15);overflow:hidden}
.gs-results a{display:flex;gap:10px;align-items:center;padding:9px 14px;color:var(--text);border-bottom:1px solid var(--line)}
.gs-results a:hover,.gs-results a.sel{background:var(--hover);text-decoration:none}
.gs-results .gs-main{flex:1;min-width:0}.gs-results .gs-sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user{margin-left:auto;display:flex;align-items:center;gap:12px}
.uname{display:flex;flex-direction:column;align-items:flex-end;color:var(--text);font-weight:600;line-height:1.2}
.uname small{color:var(--muted);font-weight:400}
.content{padding:24px;max-width:1500px;width:100%}

/* ---------- common */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.head-actions{display:flex;gap:8px;flex-wrap:wrap}
.crumbs{font-size:12px;color:var(--muted);margin-bottom:4px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:18px}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}.card-head h2{margin:0}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.grid-2>.card{margin-bottom:0}.grid-2{margin-bottom:18px}
.alert{padding:11px 14px;border-radius:8px;margin-bottom:14px;border:1px solid}
.alert-success{background:var(--good-bg);border-color:transparent;color:var(--good)}
.alert-error{background:var(--bad-bg);border-color:transparent;color:var(--bad)}
.alert-warning{background:var(--warn-bg);border-color:transparent;color:var(--warn)}
.empty{text-align:center;color:var(--muted);padding:26px!important}
.empty-state{text-align:center;padding:40px}

/* ---------- buttons & forms */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--text);font:inherit;font-weight:550;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--hover);text-decoration:none}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-2)}
.btn-danger{color:var(--bad);border-color:var(--bad)}.btn-danger:hover{background:var(--bad);color:#fff}
.btn-ghost{border-color:transparent;background:transparent}
.btn-sm{padding:4px 10px;font-size:12px}.btn-block{width:100%;justify-content:center}
.btn[disabled]{opacity:.6;cursor:wait}
input,select,textarea{font:inherit;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}
label{display:flex;flex-direction:column;gap:5px;font-weight:550;font-size:13px}
label.check{flex-direction:row;align-items:center;gap:8px;font-weight:450}
label.check input{width:auto}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}
.form-grid.inner{padding:0;border:0;margin:0;box-shadow:none}
.form-grid.one{grid-template-columns:1fr}
.span-2{grid-column:1/-1}
fieldset{border:1px solid var(--line);border-radius:8px;padding:12px 14px;margin:0}
legend{font-weight:650;padding:0 6px}
.hint{font-size:12px;color:var(--muted);font-weight:400}
.form-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.checks{display:flex;flex-wrap:wrap;gap:8px 20px}.checks.cols-2{display:grid;grid-template-columns:1fr 1fr}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding:12px}
.filters input,.filters select{width:auto;min-width:160px}.filters .grow{flex:1}
.filters input[type=search]{flex:1;min-width:200px}
.inline{display:inline}.inline-form{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}
.big-search{display:flex;gap:10px}.big-search input{font-size:16px;padding:12px 14px}
.v3{display:none}.show-v3 .v3{display:grid}.show-v3 .v12{display:none}

/* ---------- tables */
.table-wrap{overflow-x:auto;margin:0 -18px;padding:0 18px}
.table{width:100%;border-collapse:collapse}
.table th{text-align:left;font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;padding:9px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
.table th a{color:inherit}
.table td{padding:10px;border-bottom:1px solid var(--line);vertical-align:middle}
.table tbody tr:hover{background:var(--hover)}
.table.compact td{padding:6px 10px}
.table td.actions{text-align:right;white-space:nowrap}
.row-disabled{opacity:.55}
.pager{display:flex;gap:16px;justify-content:center;padding-top:14px}

/* ---------- badges & signal */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600;background:var(--gray-bg);color:var(--muted);white-space:nowrap}
.st-online,.st-up{background:var(--good-bg);color:var(--good)}
.st-los,.st-down{background:var(--bad-bg);color:var(--bad)}
.st-dyinggasp{background:var(--warn-bg);color:var(--warn)}
.st-offline{background:var(--gray-bg);color:var(--muted)}
.st-unknown{background:var(--warn-bg);color:var(--warn)}
.sig{font-family:var(--mono);font-weight:650;font-size:13px;padding:2px 7px;border-radius:6px;white-space:nowrap}
.sig-good{color:var(--good);background:var(--good-bg)}
.sig-warn{color:var(--warn);background:var(--warn-bg)}
.sig-bad{color:var(--bad);background:var(--bad-bg)}
.sig-none{color:var(--muted)}
.pppoe{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:4px}.chip{background:var(--gray-bg);border-radius:6px;padding:1px 7px;font-size:12px}
.vendor{font-weight:600}
.flash-cell{animation:flash 1.2s ease}
@keyframes flash{from{background:rgba(47,111,237,.25)}to{background:transparent}}

/* ---------- dashboard */
.kpis{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:14px;margin-bottom:18px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:4px;color:var(--text);box-shadow:var(--shadow);border-top:3px solid var(--accent)}
.kpi:hover{text-decoration:none;transform:translateY(-1px)}
.k-good{border-top-color:var(--good)}.k-bad{border-top-color:var(--bad)}.k-warn{border-top-color:var(--warn)}.k-muted{border-top-color:var(--muted)}
.kpi-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-weight:600}
.kpi-val{font-size:28px;font-weight:700;line-height:1.1}.kpi-val small{font-size:15px;color:var(--muted);font-weight:500}
.kpi-sub{font-size:12px;color:var(--muted)}
.bar{height:6px;background:var(--gray-bg);border-radius:4px;overflow:hidden;width:110px;margin-bottom:3px}
.bar span{display:block;height:100%;background:var(--good)}
.hbars{display:flex;flex-direction:column;gap:9px}
.hbar{display:grid;grid-template-columns:110px 1fr 60px;gap:10px;align-items:center;color:var(--text)}
.hbar:hover{text-decoration:none}.hbar:hover .hb-track{outline:1px solid var(--accent)}
.hb-label{font-size:12px;font-family:var(--mono)}.hb-val{text-align:right;font-weight:650}
.hb-track{height:14px;background:var(--gray-bg);border-radius:4px;overflow:hidden}
.hb-fill{display:block;height:100%;border-radius:4px}.hb-good{background:var(--good)}.hb-warn{background:var(--warn)}.hb-bad{background:var(--bad)}
.events{list-style:none;margin:0;padding:0}
.events li{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:7px 0;border-bottom:1px solid var(--line)}
.ev-arrow{margin-left:auto;display:flex;gap:4px;align-items:center}

/* ---------- OLT / ONU detail */
.info-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.lbl{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:600;margin-bottom:3px}
.signal-cards{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-bottom:8px}
.sc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow)}
.sc .big{font-size:22px;font-weight:700;font-family:var(--mono);align-self:flex-start}
.sc .big.sig{padding:2px 8px}
.dl{display:grid;grid-template-columns:150px 1fr;gap:8px 12px;margin:0}
.dl dt{color:var(--muted);font-size:13px}.dl dd{margin:0}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{border:0;background:var(--card);color:var(--text);padding:5px 12px;font:inherit;font-size:12px;cursor:pointer;border-right:1px solid var(--line)}
.seg button:last-child{border-right:0}.seg button.on{background:var(--accent);color:#fff}
.chart-box{position:relative;height:300px}
.dlg{border:1px solid var(--line);border-radius:12px;padding:16px;width:min(900px,95vw);background:var(--card);color:var(--text)}
.dlg::backdrop{background:rgba(0,0,0,.45)}
.dlg-head{display:flex;gap:12px;align-items:center;margin-bottom:12px}.dlg-head h3{flex:1}
.spin{display:inline-block;width:12px;height:12px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

/* ---------- login */
.login-page{display:grid;place-items:center;min-height:100vh;background:radial-gradient(circle at 30% 20%,#23314d,#0f141c 70%)}
.login-card{background:var(--card);padding:32px;border-radius:14px;width:min(380px,92vw);display:flex;flex-direction:column;gap:14px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.login-card .brand{padding:0;color:var(--text);font-size:20px}

/* ---------- responsive */
@media (max-width:1200px){.kpis{grid-template-columns:repeat(3,1fr)}.signal-cards{grid-template-columns:repeat(3,1fr)}.info-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){
  .sidebar{position:fixed;left:-240px;z-index:50;transition:left .2s}.sidebar.open{left:0;box-shadow:0 0 40px rgba(0,0,0,.4)}
  .burger{display:block}.grid-2{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}
  .content{padding:16px}.topbar{padding:0 16px}.uname small{display:none}
}
@media (max-width:600px){.kpis{grid-template-columns:repeat(2,1fr)}.signal-cards{grid-template-columns:repeat(2,1fr)}.checks.cols-2{grid-template-columns:1fr}.dl{grid-template-columns:1fr}.uname{display:none}}

/* ---------- MAC search */
.mac-hits{display:flex;flex-direction:column;gap:0}
.mac-hit{border-left:4px solid var(--accent)}
.mh-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px}
.mh-mac{font-size:20px;font-weight:700;margin-right:10px}
.mh-loc{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.mh-onu b{font-size:22px;color:var(--accent)}

/* ---------- diagnostics */
.diag-cls{padding:10px 0;border-top:1px solid var(--line)}
.diag-used td{background:var(--good-bg)}
.t-good{color:var(--good)}

.app-ver{padding:0 22px 18px;font-size:11px;color:#6d7891}