:root {
  --bg: #F7F5F2; --card: #FFFFFF; --text: #1E1C1A; --muted: #6B6560;
  --tint: #AD4A33; --coral: #FFA48C; --subtle: #FFEAE3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E0D0C; --card: #1E1C1A; --text: #F2EFEB; --muted: #A8A29C;
    --tint: #FFB09A; --coral: #FF9E85; --subtle: #3A2620;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8; -webkit-text-size-adjust: 100%;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
header a { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 12px; }
.logo { width: 44px; height: 44px; border-radius: 10px; background: var(--coral); display: grid; place-items: center; }
.logo svg { width: 26px; height: 26px; }
.brand { font-weight: 700; font-size: 1.15rem; }
h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.1rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: .9rem; }
.card { background: var(--card); border-radius: 16px; padding: 20px; margin: 16px 0; }
a { color: var(--tint); }
.button {
  display: inline-block; background: var(--coral); color: #6B2A19; font-weight: 700;
  padding: 12px 20px; border-radius: 12px; text-decoration: none;
}
nav { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 40px; font-size: .9rem; }
footer { margin-top: 24px; }