:root {
  --fg: #1a1a1a;
  --bg: #fff8f3;
  --accent: #e8553e;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", Meiryo, Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.8;
  margin: 0;
  font-size: 16px;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  text-align: center;
}

h1 {
  font-size: 1.3rem;
  line-height: 1.5;
  margin: 0 0 1rem;
}

.calendar img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.note {
  margin: 1.25rem 0 0;
  font-weight: bold;
  color: var(--accent);
}

@media (max-width: 600px) {
  .wrap { padding: 1rem 0.75rem 2.5rem; }
  h1 { font-size: 1.15rem; }
  .note { font-size: 0.95rem; }
}