/* ===========================================================================
   Gurun string monitoring — design tokens
   Status colours are the validated set: good #0ca30c, warning #fab219,
   critical #d03b3b. Validated for CVD separation (worst adjacent pair
   ΔE 11.3 protan, 27.6 normal) against both surfaces. `warning` sits under
   3:1 on the light surface by design — every tile carries a visible number
   and a glyph, so colour never carries meaning on its own.
   =========================================================================== */
:root {
  --surface-0:#ffffff; --surface-1:#f7f7f5; --surface-2:#eeeeeb; --surface-3:#e4e4df;
  --ink-1:#0b0b0b; --ink-2:#52514e; --ink-3:#898781;
  --line:#e1e0d9; --line-strong:#cfcec6;
  --ok:#0ca30c; --under:#fab219; --dead:#d03b3b; --idle:#9a9a94; --stale:#7d6bd4; --off:#c4c3bd;
  --ok-bg:rgba(12,163,12,.13); --under-bg:rgba(250,178,25,.18);
  --dead-bg:rgba(208,59,59,.15); --idle-bg:rgba(154,154,148,.12);
  --stale-bg:rgba(125,107,212,.14); --off-bg:rgba(196,195,189,.10);
  --accent:#2a78d6;
  --radius:10px; --radius-sm:6px;
  --shadow:0 1px 2px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.05);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --surface-0:#141416; --surface-1:#1a1a1d; --surface-2:#212125; --surface-3:#2a2a2f;
  --ink-1:#f4f4f2; --ink-2:#b6b5ae; --ink-3:#84837c;
  --line:#2c2c31; --line-strong:#3a3a41;
  --ok:#0ca30c; --under:#fab219; --dead:#d03b3b; --idle:#6e6e68; --stale:#9085e9; --off:#4a4a50;
  --ok-bg:rgba(12,163,12,.16); --under-bg:rgba(250,178,25,.15);
  --dead-bg:rgba(208,59,59,.20); --idle-bg:rgba(110,110,104,.16);
  --stale-bg:rgba(144,133,233,.16); --off-bg:rgba(74,74,80,.18);
  --accent:#3987e5;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3);
  color-scheme: dark;
}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--surface-0); color:var(--ink-1);
  font:14px/1.5 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.01em}
.muted{color:var(--ink-3)}
.err{color:var(--dead);font-size:13px;margin:8px 0 0}
[hidden]{display:none !important}

/* ── numeric type: tabular so columns of amps line up ── */
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ─────────── LOGIN ─────────── */
.login-wrap{min-height:100dvh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(1200px 600px at 50% -10%, var(--surface-2), var(--surface-0))}
.login-card{width:min(380px,100%);background:var(--surface-1);border:1px solid var(--line);
  border-radius:14px;padding:28px;box-shadow:var(--shadow)}
.login-card h1{font-size:20px;margin-top:4px}
.login-card label{display:block;font-size:12px;font-weight:600;color:var(--ink-2);
  margin:16px 0 6px;text-transform:uppercase;letter-spacing:.04em}
.login-card input{width:100%;padding:10px 12px;border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);background:var(--surface-0);color:var(--ink-1);font-size:15px}
.login-card input:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;letter-spacing:-.01em;color:var(--ink-2)}
.brand-mark{color:var(--accent);font-size:20px;line-height:1}

/* ─────────── CHROME ─────────── */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:10px 18px;background:var(--surface-1);border-bottom:1px solid var(--line)}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:10px;min-width:0}
.crumbs{display:flex;align-items:center;gap:6px;font-size:14px;flex-wrap:wrap;min-width:0}
.crumbs button{background:none;border:0;color:var(--accent);cursor:pointer;padding:2px 4px;
  border-radius:4px;font:inherit}
.crumbs button:hover{background:var(--surface-2);text-decoration:underline}
.crumbs .sep{color:var(--ink-3)}
.crumbs .here{color:var(--ink-1);font-weight:650}
.stamp{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.who{display:flex;flex-direction:column;line-height:1.25;max-width:220px}
.who-name{font-size:13px;color:var(--ink-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.who-role{font-size:11px;color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.icon-btn{background:none;border:1px solid transparent;color:var(--ink-2);cursor:pointer;
  border-radius:var(--radius-sm);width:30px;height:30px;font-size:16px;line-height:1}
.icon-btn:hover{background:var(--surface-2);color:var(--ink-1)}
.btn{font:inherit;font-weight:600;padding:7px 13px;border-radius:var(--radius-sm);cursor:pointer;
  border:1px solid var(--line-strong);background:var(--surface-2);color:var(--ink-1)}
.btn:hover{border-color:var(--ink-3)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;width:100%;margin-top:20px;padding:10px}
.btn-ghost{background:none;border-color:var(--line)}
.btn-block{width:100%}
.btn-sm{padding:4px 9px;font-size:12.5px}
.btn:disabled{opacity:.5;cursor:not-allowed}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.tabs{display:flex;gap:2px;padding:0 18px;background:var(--surface-1);border-bottom:1px solid var(--line);
  position:sticky;top:51px;z-index:29}
.tab{background:none;border:0;border-bottom:2px solid transparent;color:var(--ink-2);
  padding:9px 14px;cursor:pointer;font:inherit;font-weight:600;display:flex;align-items:center;gap:7px}
.tab:hover{color:var(--ink-1)}
.tab[aria-selected="true"]{color:var(--ink-1);border-bottom-color:var(--accent)}
.pill{font-size:11px;font-weight:700;padding:1px 7px;border-radius:999px;color:#fff;line-height:1.6}
.pill-crit{background:var(--dead)} .pill-warn{background:var(--under);color:#332600}

main{padding:18px;max-width:1600px;margin:0 auto}

/* ─────────── KPI ROW ─────────── */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:20px}
.kpi{background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius);padding:13px 15px}
.kpi-label{font-size:11px;font-weight:650;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em}
.kpi-value{font-size:26px;font-weight:680;letter-spacing:-.02em;margin-top:3px;
  font-variant-numeric:tabular-nums;line-height:1.15}
.kpi-sub{font-size:12px;color:var(--ink-3);margin-top:2px}
.kpi-value.is-ok{color:var(--ok)} .kpi-value.is-under{color:var(--under)} .kpi-value.is-dead{color:var(--dead)}

/* ─────────── SECTIONS ─────────── */
.section{margin-bottom:26px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px}
.section-head h2{font-size:15px}
.section-head .hint{font-size:12px;color:var(--ink-3)}

/* ─────────── ISLAND / SCB CARDS ─────────── */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px}
.card{background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius);
  padding:13px;cursor:pointer;text-align:left;font:inherit;color:inherit;display:block;width:100%}
.card:hover{border-color:var(--ink-3);box-shadow:var(--shadow)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:9px}
.card-title{font-weight:680;font-size:14.5px}
.card-metrics{display:flex;gap:14px;font-size:12px;color:var(--ink-2);margin-top:9px;
  font-variant-numeric:tabular-nums;flex-wrap:wrap}
.card-metrics b{color:var(--ink-1);font-weight:650}

/* health bar: proportion of strings by state, 2px gaps between fills */
.hbar{display:flex;gap:2px;height:7px;border-radius:4px;overflow:hidden;background:var(--surface-3)}
.hbar span{display:block;min-width:2px}
.hbar .h-ok{background:var(--ok)} .hbar .h-under{background:var(--under)}
.hbar .h-dead{background:var(--dead)} .hbar .h-idle{background:var(--idle)}
.hbar .h-off{background:var(--off)}

.badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;white-space:nowrap;
  display:inline-flex;align-items:center;gap:4px;border:1px solid transparent}
.b-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--ok)}
.b-degraded{background:var(--under-bg);color:var(--under);border-color:var(--under)}
.b-fault{background:var(--dead-bg);color:var(--dead);border-color:var(--dead)}
.b-idle{background:var(--idle-bg);color:var(--idle);border-color:var(--idle)}
.b-stale{background:var(--stale-bg);color:var(--stale);border-color:var(--stale)}

/* ─────────── STRING GRID ─────────── */
.strings{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px}
@media (max-width:1180px){.strings{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:560px) {.strings{grid-template-columns:repeat(2,minmax(0,1fr))}}
.str{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--surface-1);
  padding:9px 10px;cursor:pointer;text-align:left;font:inherit;color:inherit;position:relative}
.str:hover{border-color:var(--ink-3)}
.str-no{font-size:11px;color:var(--ink-3);font-weight:650;display:flex;justify-content:space-between;align-items:center}
.str-val{font-size:18px;font-weight:680;margin-top:2px;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.str-sub{font-size:10.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.s-ok{background:var(--ok-bg);border-color:color-mix(in srgb,var(--ok) 40%,transparent)}
.s-ok .str-val{color:var(--ok)}
.s-underperforming{background:var(--under-bg);border-color:color-mix(in srgb,var(--under) 55%,transparent)}
.s-underperforming .str-val{color:var(--under)}
.s-dead{background:var(--dead-bg);border-color:var(--dead)}
.s-dead .str-val{color:var(--dead)}
.s-idle{background:var(--idle-bg)} .s-idle .str-val{color:var(--ink-3)}
.s-stale{background:var(--stale-bg);border-color:color-mix(in srgb,var(--stale) 50%,transparent)}
.s-stale .str-val{color:var(--stale)}
.s-disabled{background:var(--off-bg);opacity:.62} .s-disabled .str-val{color:var(--ink-3)}
.ack-dot{position:absolute;top:6px;right:6px;width:7px;height:7px;border-radius:50%;
  background:var(--ink-3);box-shadow:0 0 0 2px var(--surface-1)}

/* ─────────── TABLE ─────────── */
.toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.toolbar select,.toolbar input[type=search]{padding:6px 10px;border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);background:var(--surface-1);color:var(--ink-1);font:inherit;font-size:13px}
.spacer{flex:1}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-1)}
table{border-collapse:collapse;width:100%;font-size:13px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-3);font-weight:650;
  position:sticky;top:0;background:var(--surface-2);z-index:1}
tbody tr:hover{background:var(--surface-2)}
tbody tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.empty{padding:40px;text-align:center;color:var(--ink-3)}
.sev{display:inline-flex;align-items:center;gap:5px;font-weight:650}
.sev-critical{color:var(--dead)} .sev-warning{color:var(--under)} .sev-info{color:var(--ink-2)}

/* ─────────── CHART ─────────── */
.chart-wrap{position:relative;background:var(--surface-1);border:1px solid var(--line);
  border-radius:var(--radius);padding:12px}
.chart-tip{position:absolute;pointer-events:none;background:var(--surface-0);border:1px solid var(--line-strong);
  border-radius:var(--radius-sm);padding:7px 10px;font-size:12px;box-shadow:var(--shadow);
  white-space:nowrap;z-index:5;font-variant-numeric:tabular-nums}
.chart-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--ink-2);margin-top:8px}
.chart-legend i{display:inline-block;width:11px;height:3px;border-radius:2px;vertical-align:middle;margin-right:5px}

/* ─────────── MODAL / TOAST ─────────── */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:grid;place-items:center;padding:20px;z-index:50}
.modal-card{background:var(--surface-1);border:1px solid var(--line);border-radius:14px;
  width:min(720px,100%);max-height:88dvh;overflow:auto;box-shadow:var(--shadow)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;
  border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--surface-1)}
.modal-head h2{font-size:16px}
.modal-body{padding:18px}
.modal-body label{display:block;font-size:12px;font-weight:600;color:var(--ink-2);
  margin:14px 0 6px;text-transform:uppercase;letter-spacing:.04em}
.modal-body label:first-child{margin-top:0}
.modal-body input[type=text],.modal-body input[type=password]{width:100%;padding:10px 12px;
  border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:var(--surface-0);
  color:var(--ink-1);font:inherit;font-size:15px}
.modal-body textarea{width:100%;min-height:74px;padding:9px 11px;border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);background:var(--surface-0);color:var(--ink-1);font:inherit;resize:vertical}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:13px;margin-bottom:16px}
.kv dt{color:var(--ink-3)} .kv dd{margin:0;font-variant-numeric:tabular-nums}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}
.evt{font-size:12.5px;border-left:2px solid var(--line-strong);padding:4px 0 4px 12px;margin-bottom:2px;color:var(--ink-2)}
.evt b{color:var(--ink-1)}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--ink-1);
  color:var(--surface-0);padding:10px 18px;border-radius:999px;font-size:13.5px;font-weight:600;z-index:60;
  box-shadow:var(--shadow)}

/* ─────────── LEGEND ─────────── */
.legend{display:flex;gap:16px;flex-wrap:wrap;align-items:center;padding:12px 18px;
  border-top:1px solid var(--line);font-size:12px;color:var(--ink-2);background:var(--surface-1)}
.lg{display:inline-flex;align-items:center;gap:6px}
.sw{width:11px;height:11px;border-radius:3px;display:inline-block;border:1px solid transparent}
.sw-ok{background:var(--ok-bg);border-color:var(--ok)}
.sw-under{background:var(--under-bg);border-color:var(--under)}
.sw-dead{background:var(--dead-bg);border-color:var(--dead)}
.sw-idle{background:var(--idle-bg);border-color:var(--idle)}
.sw-stale{background:var(--stale-bg);border-color:var(--stale)}
.sw-off{background:var(--off-bg);border-color:var(--off)}
.lg-note{color:var(--ink-3);margin-left:auto;max-width:520px}

@media (max-width:640px){
  main{padding:12px}
  .topbar{flex-wrap:wrap;gap:8px}
  .who{display:none}
  .lg-note{display:none}
}
@media (prefers-reduced-motion:no-preference){
  .card,.str,.btn{transition:border-color .12s ease, background .12s ease, box-shadow .12s ease}
}