:root {
  color-scheme: dark;
  --bg-1: #08111f;
  --bg-2: #13233a;
  --card: rgba(7, 14, 25, 0.82);
  --line: rgba(145, 187, 255, 0.22);
  --text: #eef4ff;
  --muted: #9fb3cf;
  --accent: #80ffdb;
  --accent-2: #64b5f6;
  --danger: #ff8a80;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(100, 181, 246, 0.18), transparent 30%),
    radial-gradient(circle at bottom right, rgba(128, 255, 219, 0.16), transparent 24%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 560px);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 0.95;
}

.lede,
.note {
  color: var(--muted);
  line-height: 1.6;
}

.meter {
  height: 14px;
  margin: 28px 0 24px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
}

.meter-fill {
  width: 4%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 24px rgba(128, 255, 219, 0.45);
  transition: width 180ms ease-out;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 0 0 20px;
}

.stats div {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stats dt {
  margin-bottom: 8px;
  font-size: 0.84rem;
  color: var(--muted);
}

.stats dd {
  margin: 0;
  font-size: 1.05rem;
}

.retry {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  background: var(--danger);
  color: #1a1010;
  font: inherit;
  cursor: pointer;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .card {
    padding: 24px;
  }

  .stats {
    grid-template-columns: 1fr;
  }
}