:root {
  --bg: #0b0d10;
  --fg: #f4f1ec;
  --muted: #9aa3ad;
  --accent: #6b8cae;
  --line: rgba(244, 241, 236, 0.12);
  --card: #14171c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--fg);
  text-decoration: none;
  margin-bottom: 32px;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid var(--fg);
  border-top: 0;
  border-radius: 0 0 14px 14px;
  position: relative;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  top: -10px;
  width: 2px;
  height: 14px;
  background: var(--fg);
}

.brand-mark::before { left: -2px; }
.brand-mark::after { right: -2px; }

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 36px;
}

h2 {
  font-size: 1.1rem;
  margin: 36px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

p, li { color: #d7dbe0; font-size: 0.98rem; }
ul { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin: 24px 0;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 28px;
}

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}