* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #0078d4, #50e6ff);
  color: #fff;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

h1 { font-size: 3rem; margin-bottom: 0.5rem; }
p { font-size: 1.2rem; max-width: 600px; }

button {
  margin-top: 1rem;
  padding: 0.8rem 2rem;
  font-size: 1rem;
  border: none;
  border-radius: 999px;
  background: #fff;
  color: #0078d4;
  cursor: pointer;
}

button:hover { opacity: 0.9; }

footer { text-align: center; padding: 1rem; opacity: 0.8; }