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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #1d2671 0%, #c33764 100%);
  color: #1f2937;
}

.card {
  background: #ffffff;
  padding: 48px 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  max-width: 460px;
  width: 90%;
  text-align: center;
}

.badge {
  display: inline-block;
  background: #eef2ff;
  color: #4338ca;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

h1 {
  font-size: 30px;
  margin-bottom: 14px;
  color: #111827;
}

p {
  font-size: 15px;
  line-height: 1.7;
  color: #4b5563;
  margin-bottom: 14px;
}

#counter {
  margin: 18px 0;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: #4338ca;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.2s ease;
}

#counter:hover {
  background: #3730a3;
}

#counter:active {
  transform: scale(0.96);
}

.hint {
  font-size: 13px;
  color: #9ca3af;
  margin-top: 8px;
}