/* ST-BNG SPA — network operations console
   Palette: ink slate base, signal-cyan accent (throughput/fiber motif),
   amber/red for load thresholds. System font stack so the appliance UI
   works fully offline inside the binary. */

:root {
  --bg: #0c1118;
  --bg-2: #111824;
  --panel: #141d2b;
  --panel-2: #1a2536;
  --line: #233044;
  --line-soft: #1b2738;
  --txt: #dde6f2;
  --txt-dim: #8595ad;
  --txt-faint: #5a6b85;
  --accent: #2fd6e0;        /* signal cyan */
  --accent-dim: #1b8f97;
  --good: #36d399;
  --warn: #f5b94a;
  --bad: #f06a6a;
  --pppoe: #2fd6e0;
  --ipoe: #9b8cff;
  --dhcp: #f5b94a;
  --radius: 8px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
}

[data-theme="light"] {
  --bg: #eef2f7;
  --bg-2: #e4eaf2;
  --panel: #ffffff;
  --panel-2: #f4f7fb;
  --line: #d3dceb;
  --line-soft: #e3e9f2;
  --txt: #1a2433;
  --txt-dim: #5a6b85;
  --txt-faint: #8a99b3;
  --accent: #0b9fac;
  --accent-dim: #0b9fac;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--txt);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
button { font-family: inherit; }
.mono { font-family: var(--mono); }
.hidden { display: none !important; }

/* ---------------- login ---------------- */
#login {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(1200px 600px at 70% -10%, #14233a 0%, var(--bg) 55%);
}
.login-card {
  width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 32px 30px;
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.6);
}
.brand-mark {
  display: flex; align-items: center; gap: 11px; margin-bottom: 4px;
}
.brand-mark .dot {
  width: 11px; height: 11px; border-radius: 3px; background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}
.brand-mark h1 { font-size: 21px; margin: 0; letter-spacing: .5px; font-weight: 700; }
.login-sub { color: var(--txt-faint); font-size: 12px; margin: 6px 0 22px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 11px; color: var(--txt-dim);
  text-transform: uppercase; letter-spacing: .8px; margin-bottom: 6px; }
.field input {
  width: 100%; padding: 10px 12px; background: var(--bg-2);
  border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--txt); font-size: 14px;
}
.field input:focus { outline: none; border-color: var(--accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 15px; border-radius: var(--radius); cursor: pointer;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--txt);
  font-size: 13px; font-weight: 500;
}
.btn:hover { border-color: var(--accent-dim); }
.btn-primary { background: var(--accent); color: #06222a; border-color: var(--accent);
  font-weight: 600; width: 100%; padding: 11px; }
.btn-primary:hover { filter: brightness(1.07); }
.btn-sm { padding: 5px 9px; font-size: 12px; }
.btn-danger { color: var(--bad); border-color: #43222a; }
.btn-danger:hover { background: #2a1518; border-color: var(--bad); }
.login-err { color: var(--bad); font-size: 12px; min-height: 16px; margin-top: 10px; }

/* ---------------- app shell ---------------- */
#app { display: flex; height: 100vh; }
.sidebar {
  width: 224px; flex-shrink: 0; background: var(--bg-2);
  border-right: 1px solid var(--line); display: flex; flex-direction: column;
}
.sidebar .brand-mark { padding: 16px 18px; border-bottom: 1px solid var(--line); }
.nav { flex: 1; overflow-y: auto; padding: 8px 0; }
.nav-group-label {
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--txt-faint); padding: 14px 18px 6px;
}
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 8px 18px;
  color: var(--txt-dim); font-size: 13px; border-left: 2px solid transparent;
}
.nav a:hover { color: var(--txt); background: var(--panel); }
.nav a.active { color: var(--txt); border-left-color: var(--accent);
  background: var(--panel); }
.nav a .ico { width: 16px; text-align: center; opacity: .85; font-size: 13px; }
.nav a .soon { margin-left: auto; font-size: 9px; color: var(--txt-faint);
  border: 1px solid var(--line); padding: 1px 5px; border-radius: 20px; }

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  height: 52px; flex-shrink: 0; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; padding: 0 20px; gap: 16px; background: var(--bg-2);
}
.topbar .page-title { font-size: 15px; font-weight: 600; }
.topbar .spacer { flex: 1; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; font-size: 11px;
  padding: 4px 9px; border-radius: 20px; border: 1px solid var(--line);
  color: var(--txt-dim); font-family: var(--mono);
}
.pill .led { width: 7px; height: 7px; border-radius: 50%; background: var(--txt-faint); }
.pill.live .led { background: var(--good); box-shadow: 0 0 8px var(--good); }
.pill.demo .led { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.icon-btn { width: 32px; height: 32px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel); color: var(--txt-dim);
  cursor: pointer; }
.icon-btn:hover { color: var(--txt); border-color: var(--accent-dim); }
.content { flex: 1; overflow-y: auto; padding: 20px; }

/* ---------------- cards / grid ---------------- */
.grid { display: grid; gap: 14px; }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1100px) { .cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .cols-4, .cols-3, .cols-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px;
}
.card h3 { margin: 0 0 4px; font-size: 12px; text-transform: uppercase;
  letter-spacing: .8px; color: var(--txt-dim); font-weight: 600; }
.metric { font-size: 26px; font-weight: 700; font-family: var(--mono); line-height: 1.1; }
.metric .unit { font-size: 13px; color: var(--txt-dim); font-weight: 400; margin-left: 3px; }
.metric-sub { font-size: 12px; color: var(--txt-faint); margin-top: 5px; font-family: var(--mono); }

.bar { height: 6px; background: var(--bg-2); border-radius: 4px; margin-top: 12px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent);
  border-radius: 4px; transition: width .4s ease, background .3s; }
.bar.warn > span { background: var(--warn); }
.bar.bad > span { background: var(--bad); }

.count-row { display: flex; gap: 10px; }
.count-chip { flex: 1; text-align: center; padding: 14px 8px; border-radius: var(--radius);
  background: var(--panel-2); border: 1px solid var(--line); }
.count-chip .n { font-size: 30px; font-weight: 700; font-family: var(--mono); }
.count-chip .l { font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  color: var(--txt-dim); margin-top: 2px; }
.count-chip.pppoe .n { color: var(--pppoe); }
.count-chip.ipoe .n { color: var(--ipoe); }
.count-chip.dhcp .n { color: var(--dhcp); }

/* ---------------- tables ---------------- */
.table-wrap { background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  text-align: left; padding: 10px 12px; font-size: 11px; text-transform: uppercase;
  letter-spacing: .6px; color: var(--txt-dim); background: var(--panel-2);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; white-space: nowrap;
}
tbody td { padding: 9px 12px; border-bottom: 1px solid var(--line-soft); white-space: nowrap; }
thead th.sort { cursor: pointer; user-select: none; }
thead th.sort:hover { color: var(--txt); }
tbody tr:hover { background: var(--panel-2); }
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; font-family: var(--mono); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px;
  font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.badge.pppoe { background: rgba(47,214,224,.13); color: var(--pppoe); }
.badge.ipoe { background: rgba(155,140,255,.14); color: var(--ipoe); }
.badge.dhcp { background: rgba(245,185,74,.14); color: var(--dhcp); }
.badge.active { background: rgba(54,211,153,.14); color: var(--good); }
.badge.starting { background: rgba(245,185,74,.14); color: var(--warn); }

.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar input[type=text], .toolbar select {
  padding: 8px 11px; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); color: var(--txt); font-size: 13px;
}
.toolbar input[type=text] { min-width: 220px; }
.toolbar input:focus, .toolbar select:focus { outline: none; border-color: var(--accent); }
.toolbar .spacer { flex: 1; }
.muted { color: var(--txt-faint); font-size: 12px; }

/* row action menu */
.row-actions { position: relative; }
.act-menu {
  position: absolute; right: 0; top: 26px; z-index: 40; min-width: 150px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 16px 40px -12px rgba(0,0,0,.6); overflow: hidden;
}
.act-menu button {
  display: flex; width: 100%; align-items: center; gap: 9px; padding: 9px 12px;
  background: none; border: none; color: var(--txt); font-size: 13px; cursor: pointer; text-align: left;
}
.act-menu button:hover { background: var(--panel-2); }
.act-menu button.danger { color: var(--bad); }

/* ---------------- modal ---------------- */
.modal-back { position: fixed; inset: 0; background: rgba(4,8,14,.66); z-index: 90;
  display: flex; align-items: center; justify-content: center; }
.modal { width: 640px; max-width: 94vw; background: var(--panel);
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.modal-head { display: flex; align-items: center; padding: 14px 18px;
  border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; font-size: 14px; }
.modal-head .spacer { flex: 1; }
.modal-body { padding: 18px; }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 8px 14px; font-size: 13px; }
.kv .k { color: var(--txt-dim); }
.kv .v { font-family: var(--mono); }

/* ---------------- placeholder ---------------- */
.placeholder { display: flex; flex-direction: column; align-items: center;
  justify-content: center; height: 70%; color: var(--txt-faint); text-align: center; }
.placeholder .big { font-size: 17px; color: var(--txt-dim); margin-bottom: 6px; }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

/* top-bar active subscribers strip */
.subs-strip { display: flex; gap: 14px; align-items: center; margin-right: 12px; font-size: 12px; color: var(--txt-faint); }
.subs-strip span { white-space: nowrap; }
.subs-strip b { color: var(--txt); font-weight: 600; font-variant-numeric: tabular-nums; }
.subs-strip .tot b { color: var(--accent); }
@media (max-width: 820px) { .subs-strip { display: none; } }

/* tools output panes */
.tool-out { background: var(--bg-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; font-size: 12px; line-height: 1.5; white-space: pre-wrap; word-break: break-all;
  min-height: 80px; max-height: 320px; overflow: auto; margin: 0; color: var(--txt); }

/* ---- nav submenu ---- */
#nav a.has-sub .caret { margin-left: auto; font-size: 10px; transition: transform .15s; opacity: .7; }
#nav a.has-sub.open .caret { transform: rotate(180deg); }
.nav-sub { display: none; flex-direction: column; }
.nav-sub.open { display: flex; }
#nav a.sub { padding-left: 42px; font-size: 13px; opacity: .9; }
#nav a.sub.active { opacity: 1; }

/* ---- tools ---- */
.tool-controls { display: flex; gap: 8px; align-items: center; margin: 12px 0; flex-wrap: wrap; }
.tool-controls .grow { flex: 1 1 220px; min-width: 160px; }
.tool-controls .num-sm { width: 80px; }
.tool-controls .chk, .tool-controls .lbl { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--txt-faint); white-space: nowrap; }
.tool-out.tall { min-height: 260px; max-height: 60vh; }

/* ---- hamburger (hidden on desktop) ---- */
#nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--txt);
  border-radius: 8px; width: 38px; height: 38px; font-size: 18px; cursor: pointer; margin-right: 10px; }
.nav-scrim { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 45; }

/* ---- responsive ---- */
@media (max-width: 1000px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  #nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 50;
    transform: translateX(-100%); transition: transform .2s ease; box-shadow: 2px 0 18px rgba(0,0,0,.4); }
  #app.nav-open .sidebar { transform: translateX(0); }
  #app.nav-open .nav-scrim { display: block; }
  .content { padding: 14px !important; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .toolbar { flex-wrap: wrap; }
  .page-title { font-size: 16px; }
  table { font-size: 12px; }
}

/* natlog status grid + form helpers */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.stat-grid .stat { background: var(--bg-2); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.stat-grid .stat .k { font-size: 11px; color: var(--txt-faint); text-transform: uppercase; letter-spacing: .04em; }
.stat-grid .stat .v { font-size: 18px; font-weight: 600; margin-top: 4px; }
select.sel { width: 100%; padding: 10px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 8px; color: var(--txt); }
label.chk { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--txt); }
@media (max-width: 760px) { .stat-grid { grid-template-columns: 1fr 1fr; } }

/* warning note (e.g. natlog local storage) */
.warn-note { margin-top: 8px; padding: 10px 12px; border-radius: 8px; font-size: 12px; line-height: 1.5;
  background: rgba(220, 160, 40, .12); border: 1px solid rgba(220, 160, 40, .4); color: var(--txt); }