/* ==========================================================================
   OwnNet Edge Gateway — gw-se.ownnet.club
   Technical service-status screen.
   ========================================================================== */

:root {
  --ink: #0F172A;
  --ink-soft: #334155;
  --muted: #64748B;
  --line: #E2E8F0;
  --line-strong: #CBD5E1;
  --bg: #FFFFFF;
  --surface: #F8FAFC;
  --brand: #2563EB;
  --ok: #10B981;
  --ok-ink: #047857;
  --ok-tint: #ECFDF5;
  --font: "Inter", "Inter var", system-ui, -apple-system, BlinkMacSystemFont,
          "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --r: 12px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, #FBFCFE 0%, #F5F7FA 100%),
    #fff;
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.page {
  flex: 1 0 auto;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 40px;
}

/* Top bar */

.node-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.node-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: .92rem;
  color: var(--ink);
  letter-spacing: -.01em;
}
.node-brand:hover { text-decoration: none; color: var(--ink); }

.node-brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
}

.node-id {
  margin-left: auto;
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--muted);
  text-transform: uppercase;
}

/* Header */

.node-head { padding: 40px 0 0; }

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.32rem, 3.4vw, 1.85rem);
  font-weight: 650;
  letter-spacing: -.025em;
  line-height: 1.2;
}

.node-sub {
  margin: 0;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* Status pill */

.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 10px 16px;
  border: 1px solid #A7F3D0;
  border-radius: 999px;
  background: var(--ok-tint);
  color: var(--ok-ink);
  font-family: var(--mono);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
}

.pulse {
  position: relative;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ok);
  flex: 0 0 auto;
}
.pulse::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, .55);
  animation: heartbeat 2.2s infinite;
}

@keyframes heartbeat {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, .5); }
  70%  { box-shadow: 0 0 0 11px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Metrics */

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 32px 0 0;
  padding: 0;
}

.metric {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .05);
}

.metric dt {
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.01em;
}

.metric dd small {
  display: block;
  margin-top: 4px;
  font-family: var(--font);
  font-size: .74rem;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0;
}

/* Details list */

.panel {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  overflow: hidden;
}

.panel-head {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
}

.kv { margin: 0; padding: 0; }

.kv > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  justify-content: space-between;
  padding: 11px 16px;
  border-bottom: 1px solid #F1F5F9;
  font-size: .86rem;
}
.kv > div:last-child { border-bottom: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); font-size: .82rem; color: var(--ink-soft); }
.kv dd.ok { color: var(--ok-ink); font-weight: 600; }

/* Back link */

.node-foot {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  font-size: .85rem;
}

.back-link { font-weight: 600; }
.node-foot .stamp {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--muted);
}

/* 404 */

.error-shell {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 620px;
  margin: 0 auto;
  padding: 64px 24px;
}

.error-code {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: clamp(4rem, 15vw, 7rem);
  font-weight: 700;
  letter-spacing: -.05em;
  line-height: 1;
  background: linear-gradient(180deg, #0F172A 0%, #A8B4C6 135%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.error-shell h1 { margin: 0 0 10px; font-size: 1.3rem; letter-spacing: -.02em; }
.error-shell p { margin: 0 0 8px; color: var(--muted); font-size: .92rem; max-width: 48ch; }
.error-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-family: inherit;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 1px 2px rgba(37, 99, 235, .28);
}
.btn:hover { text-decoration: none; background: #1D4ED8; color: #fff; }
.btn--ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line-strong);
  box-shadow: none;
}
.btn--ghost:hover { background: var(--surface); color: var(--ink); }

@media (max-width: 640px) {
  .metrics { grid-template-columns: minmax(0, 1fr); }
  .page { padding: 36px 18px 32px; }
  .node-id { margin-left: 0; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}