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

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #e2e8f0;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 40px 36px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.12);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 20px;
}

h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

.subtitle {
  color: #94a3b8;
  margin-bottom: 28px;
  line-height: 1.5;
}

.status {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
}

.row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
}

.row span:first-child {
  color: #64748b;
}

button {
  width: 100%;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  color: #0f172a;
  background: #38bdf8;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #7dd3fc;
}

.pong {
  margin-top: 14px;
  text-align: center;
  font-size: 14px;
  color: #4ade80;
  min-height: 20px;
}