:root {
  --bg: #faf8f5;
  --fg: #1f1d1a;
  --muted: #6b665e;
  --accent: #b23a2e;
  --card: #ffffff;
  --line: #e6e1d9;
  --max: 960px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161513; --fg: #ece8e1; --muted: #a19a8f; --accent: #e0675a; --card: #1f1d1a; --line: #2e2b27; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  max-width: var(--max); margin: 0 auto; padding: 20px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.logo { color: var(--fg); font-weight: 700; font-size: 1.1rem; }
.logo:hover { text-decoration: none; }
.kanji { color: var(--accent); margin-right: 4px; }
nav { display: flex; gap: 20px; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: .95rem; }

main { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
section { padding: 56px 0; border-top: 1px solid var(--line); }
section.hero { border-top: 0; padding: 72px 0 64px; }
.eyebrow { color: var(--accent); letter-spacing: .08em; font-size: .9rem; margin: 0 0 8px; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1.1; margin: 0 0 16px; }
h2 { font-size: 1.6rem; margin: 0 0 20px; }
h3 { font-size: 1.1rem; margin: 0 0 8px; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 620px; margin: 0 0 28px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 12px 22px; border-radius: 8px; font-weight: 600;
}
.btn:hover { text-decoration: none; opacity: .9; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card p { margin: 0; color: var(--muted); font-size: .97rem; }

.steps { padding-left: 1.2em; margin: 0; }
.steps li { margin: 0 0 12px; }

.mail { font-size: 1.25rem; font-weight: 600; }

footer { max-width: var(--max); margin: 0 auto; padding: 32px 24px 48px; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--line); }

.center { min-height: 70vh; display: flex; flex-direction: column; justify-content: center; }

.lang { border: 1px solid var(--line); border-radius: 6px; padding: 0 8px; }
.posts { list-style: none; padding: 0; margin: 0; }
.posts li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.posts time { color: var(--muted); font-size: .9rem; margin-right: 12px; }
.empty { color: var(--muted); }

.lang { border: 1px solid var(--line); border-radius: 6px; padding: 0 8px; }
.posts { list-style: none; padding: 0; margin: 0; }
.posts li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.posts time { color: var(--muted); font-size: .9rem; margin-right: 12px; }
.posts .summary { margin: 4px 0 0; color: var(--muted); font-size: .95rem; }
.empty { color: var(--muted); }

.post { padding: 48px 0 64px; max-width: 720px; }
.post h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.post .meta { color: var(--muted); margin: 0 0 32px; }
.post-body { font-size: 1.05rem; }
.post-body img { max-width: 100%; height: auto; border-radius: 8px; }
.post-body pre { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; overflow-x: auto; }