:root {
  --ink: #1c1c1e;
  --paper: #fbfaf7;
  --accent: #2f5d50;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-align: center;
  padding: 2rem;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

p {
  margin: 0;
  max-width: 36ch;
  line-height: 1.6;
  color: #5a5a5e;
}

button {
  font: inherit;
  font-size: 1rem;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

button:hover { background: #3d7466; }

button:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}