:root {
  --ink: #0B1220;
  --ink-panel: #101a2c;
  --line: #223047;
  --ivory: #EFEAE0;
  --ivory-dim: #9AA6B8;
  --amber: #E3B341;
  --teal: #3E8E89;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--ink);
  background-image:
    radial-gradient(circle at 20% 15%, rgba(62, 142, 137, 0.10), transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(227, 179, 65, 0.08), transparent 45%);
  color: var(--ivory);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.panel {
  width: 100%;
  max-width: 560px;
  text-align: center;
  padding: 56px 40px 44px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, var(--ink-panel), rgba(16, 26, 44, 0.6));
  box-shadow: 0 40px 80px -40px rgba(0,0,0,0.7);
}

/* Signature element: a live signal / radar ping */
.signal {
  position: relative;
  width: 64px;
  height: 64px;
  margin: 0 auto 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.signal .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(227, 179, 65, 0.9);
  z-index: 2;
}

.signal .ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(227, 179, 65, 0.55);
  animation: ping 2.8s cubic-bezier(0.2, 0.6, 0.4, 1) infinite;
  opacity: 0;
}

.signal .ring-2 {
  animation-delay: 1.4s;
}

@keyframes ping {
  0%   { transform: scale(0.3); opacity: 0.7; }
  70%  { opacity: 0; }
  100% { transform: scale(1.8); opacity: 0; }
}

.eyebrow {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 18px;
}

#status-code {
  color: var(--amber);
}

h1 {
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.15;
  margin: 0 0 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.lede {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ivory-dim);
  max-width: 40ch;
  margin: 0 auto 34px;
}

.readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.readout div {
  padding: 0 8px;
}

.readout dt {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  margin-bottom: 6px;
}

.readout dd {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.foot {
  margin-top: 28px;
  font-size: 12px;
  color: var(--ivory-dim);
  text-align: center;
  max-width: 560px;
}

@media (max-width: 480px) {
  .panel { padding: 44px 24px 32px; }
  .readout { grid-template-columns: 1fr; gap: 14px; text-align: left; padding-top: 20px; }
  .readout dt, .readout dd { display: inline; }
  .readout dt { margin-right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .signal .ring { animation: none; opacity: 0; }
}