:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
}

.container {
  flex: 1;
  display: grid;
  place-content: center;
  gap: 1rem;
  padding: 1.5rem;
}

.hero {
  text-align: center;
}

h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  width: min(100%, 34rem);
}

.card ul {
  margin: 0;
  padding-left: 1.1rem;
  line-height: 1.8;
}

.card h2 {
  margin: 1rem 0 0.35rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  padding: 0.9rem 1rem 1.2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

@media (min-width: 900px) {
  .card {
    width: min(100%, 38rem);
  }
}