:root {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --accent: #38bdf8;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Hiragino Sans", sans-serif;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 2.5rem;
  max-width: 480px;
  width: 90%;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 2rem;
  line-height: 1.6;
}

.counter {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.counter button {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #0f172a;
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.1s ease;
}

.counter button:active {
  transform: scale(0.92);
}

#count {
  font-size: 2rem;
  font-weight: bold;
  min-width: 3rem;
  text-align: center;
}

.env-info {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.env-info p {
  margin: 0.3rem 0;
}