:root {
  --background: #090d14;
  --panel: #111824;
  --panel-strong: #172131;
  --border: #263247;
  --text: #f3f7ff;
  --muted: #93a0b5;
  --accent: #7ce4c2;
  --accent-dark: #123a34;
  --danger: #ff8f9b;
  --warning: #ffd07d;
  --offline: #67748a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% -10%, rgba(53, 143, 133, .22), transparent 32rem),
    var(--background);
  color: var(--text);
}
button, input, select { font: inherit; }
button { cursor: pointer; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem max(1.25rem, calc((100vw - 1440px) / 2));
  border-bottom: 1px solid var(--border);
  background: rgba(9, 13, 20, .8);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.eyebrow {
  margin: 0 0 .4rem;
  color: var(--accent);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
}
h1, h2 { margin: 0; letter-spacing: -.035em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: 1.55rem; }
main { max-width: 1440px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }

.auth-panel { width: min(100%, 390px); }
.auth-panel label { display: block; margin-bottom: .45rem; color: var(--muted); font-size: .78rem; }
.auth-row { display: flex; gap: .55rem; }
input, select {
  color: var(--text);
  background: #0c121d;
  border: 1px solid var(--border);
  border-radius: .65rem;
  padding: .7rem .8rem;
}
input { min-width: 0; flex: 1; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button {
  border: 1px solid transparent;
  border-radius: .65rem;
  padding: .68rem .9rem;
  font-weight: 750;
}
.primary { color: #06110e; background: var(--accent); }
.secondary { color: var(--text); background: var(--panel); border-color: var(--border); }
.danger-button { color: var(--danger); background: transparent; border-color: rgba(255, 143, 155, .35); padding: .45rem .65rem; }
button:disabled { opacity: .45; cursor: not-allowed; }

.status {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: .55rem;
  font-size: .76rem;
  color: var(--muted);
}
.status::before { content: ""; width: .48rem; height: .48rem; border-radius: 50%; background: currentColor; }
.status.online { color: var(--accent); }
.status.offline { color: var(--offline); }
.status.error { color: var(--danger); }
.status.warning { color: var(--warning); }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .85rem;
}
.summary-card {
  padding: 1.15rem;
  border: 1px solid var(--border);
  border-radius: .9rem;
  background: linear-gradient(145deg, var(--panel-strong), var(--panel));
}
.summary-card span { display: block; color: var(--muted); font-size: .78rem; }
.summary-card strong { display: block; margin-top: .4rem; font-size: 1.75rem; letter-spacing: -.03em; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin: 2.4rem 0 1rem; }

.node-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 1rem; }
.node-card {
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
  overflow: hidden;
}
.node-card.disabled { opacity: .68; }
.node-header { display: flex; justify-content: space-between; gap: 1rem; padding: 1.1rem; border-bottom: 1px solid var(--border); }
.node-title { display: flex; align-items: center; gap: .65rem; }
.node-title h3 { margin: 0; font-size: 1.05rem; }
.node-meta { margin-top: .25rem; color: var(--muted); font-size: .74rem; }
.node-body { padding: 1.1rem; }
.network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.network-card { padding: .8rem; border: 1px solid var(--border); border-radius: .75rem; background: #0d141f; }
.network-title { display: flex; justify-content: space-between; align-items: center; font-size: .8rem; font-weight: 800; }
.network-details { display: grid; gap: .25rem; margin-top: .65rem; color: var(--muted); font-size: .72rem; }
.network-details span { display: flex; justify-content: space-between; gap: 1rem; }
.network-details b { color: var(--text); font-weight: 600; text-align: right; overflow-wrap: anywhere; }
.policy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: .85rem; }
.policy-grid label { color: var(--muted); font-size: .72rem; }
.policy-grid select { display: block; width: 100%; margin-top: .35rem; }
.node-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin-top: .85rem; }
.mini-stat { padding: .65rem; border-radius: .65rem; background: #0d141f; }
.mini-stat span { display: block; color: var(--muted); font-size: .66rem; }
.mini-stat strong { display: block; margin-top: .2rem; font-size: .86rem; }
.switch { display: inline-flex; align-items: center; gap: .45rem; color: var(--muted); font-size: .73rem; }
.switch input { width: 2.4rem; flex: none; accent-color: var(--accent); }

.table-shell { overflow-x: auto; border: 1px solid var(--border); border-radius: .9rem; background: var(--panel); }
table { width: 100%; border-collapse: collapse; min-width: 880px; }
th, td { padding: .85rem .9rem; border-bottom: 1px solid var(--border); text-align: left; font-size: .78rem; }
th { color: var(--muted); font-size: .69rem; text-transform: uppercase; letter-spacing: .08em; }
tbody tr:last-child td { border-bottom: 0; }
.protocol-pill { display: inline-block; padding: .24rem .42rem; border-radius: .4rem; background: var(--accent-dark); color: var(--accent); font-weight: 800; text-transform: uppercase; font-size: .65rem; }
.compact-control { color: var(--muted); font-size: .75rem; }
.compact-control select { margin-left: .4rem; padding: .45rem; }
.empty-state, .empty-cell { color: var(--muted); text-align: center; padding: 2.5rem; border: 1px dashed var(--border); border-radius: .9rem; }
.empty-cell { border: 0; }

#toast {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  max-width: min(90vw, 420px);
  padding: .85rem 1rem;
  border: 1px solid var(--border);
  border-radius: .75rem;
  background: var(--panel-strong);
  box-shadow: 0 12px 36px rgba(0, 0, 0, .35);
  opacity: 0;
  transform: translateY(.5rem);
  pointer-events: none;
  transition: .2s ease;
}
#toast.visible { opacity: 1; transform: none; }
#toast.error { border-color: rgba(255, 143, 155, .55); color: var(--danger); }

@media (max-width: 760px) {
  .topbar { position: static; flex-direction: column; padding: 1.35rem 1.25rem; }
  .auth-panel { width: 100%; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .node-grid { grid-template-columns: 1fr; }
  .network-grid, .policy-grid { grid-template-columns: 1fr; }
}