* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg1: #0f172a;
  --bg2: #1e293b;
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1e3a5f, var(--bg1));
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 520px;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 20px;
  padding: 40px;
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}

h1 {
  font-size: 32px;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.lead {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 12px;
  padding: 14px 16px;
}

.cell .k { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.cell .v { font-size: 16px; font-weight: 600; color: var(--text); }

.hint {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  padding: 14px 16px;
  background: rgba(56, 189, 248, 0.06);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  margin-bottom: 24px;
}

footer {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  padding-top: 18px;
}