:root {
  --bg: #f4f7f5;
  --card: #ffffff;
  --text: #1c2622;
  --muted: #5a6762;
  --accent: #0f9d6e;
  --accent-soft: #e3f5ee;
  --border: #e2e8e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1311;
    --card: #131d1a;
    --text: #e5ece9;
    --muted: #97a6a0;
    --accent: #34d399;
    --accent-soft: #163029;
    --border: #22302b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 16px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); }

.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

.card {
  width: 100%;
  max-width: 520px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 32px;
  text-align: center;
}

.icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
}

.card h1 {
  font-size: clamp(1.75rem, 6vw, 2.5rem);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.lead {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.card p:last-child { margin-bottom: 0; }