:root {
  --accent: #FF5A5F;
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
header.site {
  background: linear-gradient(135deg, #FF5A5F, #FF8A5B);
  color: #fff; padding: 28px 20px; text-align: center;
}
header.site h1 { margin: 0; font-size: 1.4rem; }
header.site p { margin: 6px 0 0; opacity: .9; font-size: .9rem; }
.card {
  background: var(--card); border-radius: 18px; padding: 24px;
  box-shadow: 0 4px 18px rgba(0,0,0,.05); margin-top: 20px;
}
h2 { font-size: 1.5rem; margin: 0 0 4px; }
.date { color: var(--muted); font-size: .85rem; margin: 0 0 8px; }
h3 { color: var(--accent); font-size: 1.05rem; margin: 24px 0 6px; }
p { margin: 0 0 4px; white-space: pre-line; }
a { color: var(--accent); }
.nav { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }
.nav a {
  display: inline-block; padding: 10px 18px; background: var(--card);
  border-radius: 12px; text-decoration: none; font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
footer { text-align: center; color: var(--muted); font-size: .8rem; margin-top: 40px; }