:root {
  --bg: #f2f3f0;
  --card: #ffffff;
  --ink: #1c1b1b;
  --muted: #6b7069;
  --accent: #4e635a;
  --accent-soft: #e8edeb;
  --line: #e0ddd9;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", Meiryo, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.85;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
}

.langbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: rgba(242, 243, 240, 0.9);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.langbar .brand {
  flex: 1;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.06em;
}

button.lang {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

button.lang.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 18px 72px;
}

.doc {
  background: var(--card);
  border-radius: 20px;
  padding: 32px 26px 40px;
  margin-top: 20px;
  box-shadow: 0 6px 24px rgba(78, 99, 90, 0.08);
}

h1 {
  font-size: 22px;
  line-height: 1.5;
  margin: 0 0 8px;
  text-align: center;
}

h2 {
  font-size: 18px;
  margin: 32px 0 10px;
  padding-left: 12px;
  border-left: 4px solid var(--accent);
  line-height: 1.45;
}

h3 {
  font-size: 15px;
  margin: 22px 0 8px;
  color: var(--muted);
}

p,
ul,
ol {
  margin: 0 0 14px;
}

ul,
ol {
  padding-left: 22px;
}

li {
  margin-bottom: 6px;
}

a {
  color: var(--accent);
  word-break: break-all;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--accent-soft);
  font-weight: 700;
}

hr {
  border: none;
  border-top: 1px dashed var(--line);
  margin: 28px 0 16px;
}

.updated {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  margin-top: 28px;
}