:root {
  --green: #1f9d55;
  --green-deep: #157347;
  --ink: #26251f;
  --ink-2: #5c5b52;
  --ink-3: #8a887e;
  --line: #e8e6dd;
  --bg: #ffffff;
  --surface: #f7f6f1;
  --amber-bg: #fbf3df;
  --amber-ink: #8a6d1f;
  --max-w: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececE4;
    --ink-2: #b8b6ac;
    --ink-3: #8a887e;
    --line: #33322c;
    --bg: #1a1a17;
    --surface: #24231f;
    --amber-bg: #332b16;
    --amber-ink: #e0c78a;
  }
}

* { box-sizing: border-box; }

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

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--green);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}
.site-nav a:hover { color: var(--green); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 34px 22px 60px;
}

h1 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}
h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 34px 0 10px;
  padding-top: 8px;
}
h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 20px 0 6px;
  color: var(--ink);
}
p, li { color: var(--ink); }
a { color: var(--green-deep); }
.updated { color: var(--ink-3); font-size: 13px; margin: 0 0 24px; }

.lead {
  font-size: 17px;
  color: var(--ink-2);
  margin: 0 0 26px;
}

.hero {
  background: linear-gradient(135deg, #1c6b45, #0f3d27);
  color: #fff;
  border-radius: 20px;
  padding: 34px 28px;
  margin-bottom: 30px;
}
.hero h1 { color: #fff; }
.hero p { color: rgba(255,255,255,0.86); margin: 8px 0 0; }

.notice {
  background: var(--amber-bg);
  color: var(--amber-ink);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 13.5px;
  margin: 0 0 28px;
}
.notice strong { color: var(--amber-ink); }

.placeholder {
  background: var(--surface);
  border: 1px dashed var(--ink-3);
  border-radius: 6px;
  padding: 1px 7px;
  font-size: 13px;
  color: var(--ink-2);
  font-weight: 600;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 20px;
  margin: 16px 0;
}

table.info {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14.5px;
}
table.info th, table.info td {
  text-align: left;
  vertical-align: top;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
}
table.info th {
  width: 34%;
  color: var(--ink-2);
  font-weight: 600;
  white-space: nowrap;
}

ol, ul { padding-left: 1.3em; }
li { margin: 4px 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}
.feature h3 { margin-top: 0; color: var(--green-deep); }
.feature p { font-size: 14px; color: var(--ink-2); margin: 4px 0 0; }

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 13px;
}
.site-footer .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 26px 22px 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.site-footer a { color: var(--ink-2); text-decoration: none; }
.site-footer a:hover { color: var(--green); }