:root {
  --ink: #14181d;
  --ink-soft: #4a5561;
  --line: #dfe4ea;
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --accent: #1f4e79;
  --warn-bg: #fff8e6;
  --warn-line: #e0b84a;
  --warn-ink: #6b4e0a;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  background: var(--bg);
  font-feature-settings: "palt" 1;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

header.site {
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

header.site .wrap { padding-top: 22px; padding-bottom: 0; }

.brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
  text-decoration: none;
}

nav.site {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 14px 0 0;
  padding: 0 0 12px;
  font-size: 14px;
}

nav.site a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}

nav.site a:hover { color: var(--accent); }
nav.site a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--accent);
}

h1 {
  font-size: 27px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  margin: 28px 0 20px;
}

h2 {
  font-size: 19px;
  line-height: 1.65;
  margin: 44px 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

h3 {
  font-size: 16px;
  margin: 28px 0 8px;
}

p { margin: 0 0 16px; }

a { color: var(--accent); }

strong { font-weight: 700; }

.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 4px;
  padding: 14px 18px;
  margin: 0 0 28px;
  font-size: 15px;
  color: var(--warn-ink);
  line-height: 1.85;
}

.notice p { margin: 0; }
.notice p + p { margin-top: 8px; }

.lead {
  font-size: 17px;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

ul, ol { margin: 0 0 16px; padding-left: 1.5em; }
li { margin-bottom: 8px; }

.tablewrap {
  overflow-x: auto;
  margin: 0 0 20px;
  -webkit-overflow-scrolling: touch;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 460px;
  font-size: 15px;
  line-height: 1.75;
}

th, td {
  border: 1px solid var(--line);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg-soft);
  font-weight: 700;
  white-space: nowrap;
}

td.num { text-align: right; font-variant-numeric: tabular-nums; }

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
}

pre {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  margin: 0 0 20px;
  -webkit-overflow-scrolling: touch;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0 8px;
}

.cta a {
  display: inline-block;
  padding: 11px 20px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
}

.cta a:hover { background: var(--accent); color: #fff; }

form.notify {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px;
  margin: 0 0 20px;
}

form.notify label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.formrow { display: flex; flex-wrap: wrap; gap: 10px; }

form.notify input[type="email"] {
  flex: 1 1 260px;
  font-family: var(--sans);
  font-size: 16px;
  padding: 10px 12px;
  border: 1px solid #b9c2cc;
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
}

form.notify button {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  padding: 10px 22px;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

form.notify button:disabled { opacity: 0.55; cursor: default; }

.formnote { font-size: 13.5px; color: var(--ink-soft); margin: 12px 0 0; }

.formmsg { font-size: 14.5px; margin: 12px 0 0; min-height: 1.2em; }
.formmsg.ok { color: #1a6b3c; font-weight: 700; }
.formmsg.ng { color: #a3312a; font-weight: 700; }

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding-top: 20px;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.85;
}

footer.site p { margin: 0 0 6px; }

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  h1 { font-size: 23px; }
  h2 { font-size: 18px; }
  .wrap { padding: 0 16px 60px; }
}