:root {
  --bisp-blue: #0a3d62;
  --bisp-blue-dark: #061f33;
  --bisp-blue-light: #1e5c8a;
  --bisp-accent: #2ed1ff;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at top, #0d598f, var(--bisp-blue-dark));
  color: #f1f5f9;
  min-height: 100vh;
}

.navbar {
  background-color: rgba(6, 31, 51, 0.95);
  backdrop-filter: blur(10px);
}

.navbar-toggler {
  border-color: rgba(255, 255, 255, 0.4);
}

.navbar-toggler-icon {
  filter: invert(1);
}

.hero {
  background: linear-gradient(135deg, rgba(14, 94, 151, 0.6), rgba(6, 31, 51, 0.9));
}

.bg-darker {
  background: rgba(2, 9, 17, 0.4);
}

.text-white-75 {
  color: rgba(255, 255, 255, 0.75);
}

.tracking {
  letter-spacing: 0.25em;
}

.antenna-card {
  background: linear-gradient(160deg, rgba(30, 92, 138, 0.7), rgba(10, 61, 98, 0.7));
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.antenna-icon {
  position: relative;
  width: 150px;
  height: 150px;
}

.antenna-icon .mast {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 6px;
  height: 80px;
  background: #fff;
  transform: translateX(-50%);
  border-radius: 3px;
}

.antenna-icon .signal {
  position: absolute;
  bottom: 30px;
  left: 50%;
  width: 12px;
  height: 12px;
  border: 2px solid var(--bisp-accent);
  border-radius: 50%;
  transform: translateX(-50%);
  animation: pulse 3s ease-in-out infinite;
}

.signal-1 {
  width: 40px;
  height: 40px;
  animation-delay: 0s;
}

.signal-2 {
  width: 70px;
  height: 70px;
  animation-delay: 0.4s;
}

.signal-3 {
  width: 100px;
  height: 100px;
  animation-delay: 0.8s;
}

@keyframes pulse {
  0% {
    opacity: 0.2;
  }
  50% {
    opacity: 0.9;
  }
  100% {
    opacity: 0.2;
  }
}

.log-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 150ms ease, border-color 150ms ease;
}

.log-card:hover {
  transform: translateY(-4px);
  border-color: rgba(46, 209, 255, 0.4);
}

.site-card {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(6, 31, 51, 0.65);
  transition: border-color 150ms ease;
}

.site-card.up {
  border-color: rgba(46, 255, 176, 0.6);
}

.site-card.degraded {
  border-color: rgba(255, 196, 0, 0.6);
}

.site-card.down {
  border-color: rgba(255, 99, 132, 0.6);
}

.site-card .status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
}

footer {
  background: rgba(0, 0, 0, 0.15);
}

footer a {
  color: var(--bisp-accent);
}

@media (max-width: 576px) {
  .tracking {
    letter-spacing: 0.2em;
  }
}