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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #0f172a;
  color: #f8fafc;
  padding: 20px;
}

.card {
  background: #1e293b;
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 420px;
  width: 100%;
  border: 1px solid #334155;
}

.badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 1rem;
}

h1 {
  color: #f8fafc;
  font-size: 24px;
  margin-bottom: 0.5rem;
}

p {
  color: #94a3b8;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.counter-box {
  background: #0f172a;
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 1.5rem;
  border: 1px solid #1e293b;
}

#counter-value {
  font-size: 32px;
  font-weight: bold;
  color: #38bdf8;
}

button {
  background: linear-gradient(135deg, #f97316, #ea580c);
  border: none;
  padding: 14px 28px;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  width: 100%;
  transition: transform 0.1s, opacity 0.2s;
}

button:active {
  transform: scale(0.97);
  opacity: 0.9;
}