:root {
  --bg: #eef0ea;
  --ink: #21261f;
  --accent: #4a6670;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  padding: 2rem;
}

main {
  max-width: 32rem;
  text-align: center;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 0 1.2rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 0.4rem;
}

p {
  font-size: 1rem;
  line-height: 1.9;
  margin: 0 0 0.8rem;
}

.note {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--accent);
}