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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f3f4f6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  text-align: center;
  min-width: 320px;
}

h1 {
  font-size: 28px;
  color: #1f2937;
  margin-bottom: 8px;
}

.desc {
  color: #6b7280;
  margin-bottom: 32px;
  font-size: 14px;
}

.counter-box {
  background: #f9fafb;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

.label {
  display: block;
  color: #6b7280;
  font-size: 14px;
  margin-bottom: 8px;
}

.number {
  display: block;
  font-size: 48px;
  font-weight: 700;
  color: #2563eb;
  margin-bottom: 8px;
}

.tip {
  font-size: 12px;
  color: #9ca3af;
}

.info {
  font-size: 12px;
  color: #9ca3af;
}