* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

html, body {
  height: 100%;
  background: #0e1526;
  color: #ffffff;
}

.screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 360px;
  background: #1b2438;
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
}

.spinner {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.12);
  border-top-color: #4a86f7;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.card h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card .sub {
  font-size: 14px;
  color: #8a93a6;
  margin-bottom: 24px;
}

.countdown-btn {
  background: #4a86f7;
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
  border-radius: 24px;
  padding: 14px;
  width: 100%;
  opacity: 0.9;
}