:root {
  --bg: #0b0c0f;
  --text: #f0f2f5;
  --accent: #71c2ff;
  --card-bg: #15181e;
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7f9;
    --text: #1a1b1e;
    --accent: #0d66ff;
    --card-bg: #ffffff;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
}

.card {
  background: var(--card-bg);
  padding: 2.5rem 2rem;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  max-width: 400px;
  width: 90%;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.8rem;
}
.tagline {
  margin: 0 0 1.5rem;
  color: var(--accent);
  font-size: 1rem;
}

.contact p {
  margin: 0.6rem 0;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

.social {
  margin: 1.5rem 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
}
.social a { font-weight: 500; }

footer {
  margin-top: 1rem;
  font-size: 0.85rem;
  opacity: 0.7;
}