:root {
  color-scheme: light;
  --bg: #f8f7f2;
  --paper: #fffefa;
  --ink: #202427;
  --muted: #626a70;
  --line: #d8d4c8;
  --accent: #0f766e;
  --accent-2: #a85526;
  --soft: #eef6f3;
  --warn: #fff2d5;
  --shadow: 0 16px 40px rgba(27, 32, 35, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 254, 250, 0.92);
}

.nav {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

.hero,
.page {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 64px 0 32px;
}

.hero h1,
.page h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero p {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.08rem;
}

.doc-grid {
  width: min(1120px, calc(100% - 32px));
  margin: 28px auto 72px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.doc-card {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.doc-card h2 {
  margin: 0 0 12px;
  font-size: 1.22rem;
  line-height: 1.35;
}

.doc-card p {
  margin: 0;
  color: var(--muted);
}

.doc-card span {
  margin-top: 24px;
  color: var(--accent);
  font-weight: 700;
}

.page {
  padding: 46px 0 80px;
}

.meta {
  margin: 18px 0 28px;
  color: var(--muted);
}

.notice {
  margin: 26px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--accent-2);
  background: var(--warn);
}

.document {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.document h2 {
  margin-top: 2.2em;
  padding-top: 0.4em;
  border-top: 1px solid var(--line);
  font-size: 1.35rem;
}

.document h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.document h3 {
  margin-top: 1.8em;
  font-size: 1.08rem;
}

.document table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 0.95rem;
}

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

.document th {
  background: var(--soft);
  text-align: left;
}

.document ul {
  padding-left: 1.3rem;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .document {
    padding: 22px;
  }

  .document table {
    display: block;
    overflow-x: auto;
  }
}