:root {
  --bg: #F2F7F5;
  --surface: #FFFFFF;
  --surface-alt: #E5F1ED;
  --text: #20332F;
  --muted: #6F7F7B;
  --accent: #287D72;
  --accent-soft: #D8ECE7;
  --danger: #B8584D;
  --border: #DCE7E3;
  --max-width: 720px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", Roboto, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

.brand .mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: 900;
  font-size: 15px;
  flex-shrink: 0;
}

.lang-switch a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
}

.lang-switch a:hover { background: var(--accent-soft); }

h1 {
  font-size: 26px;
  font-weight: 900;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.subtitle {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 32px;
}

h2 {
  font-size: 18px;
  font-weight: 800;
  margin: 40px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

h2:first-of-type { border-top: none; padding-top: 0; }

h3 {
  font-size: 15px;
  font-weight: 800;
  margin: 20px 0 8px;
  color: var(--accent);
}

p { margin: 0 0 14px; }

ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 0 0 16px;
}

.card.muted { background: var(--surface-alt); }

.note {
  font-size: 13.5px;
  color: var(--muted);
}

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

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 700;
  font-size: 13px;
}

.table-scroll {
  overflow-x: auto;
  margin: 0 0 16px;
}

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

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  font-weight: 700;
  padding: 13px 22px;
  border-radius: 14px;
  margin: 6px 8px 6px 0;
}

.btn:hover { opacity: 0.92; }

.btn.secondary {
  background: var(--surface);
  color: var(--accent) !important;
  border: 1px solid var(--border);
}

.danger-zone {
  border: 1px solid #EAD0CC;
  background: #FBF2F1;
  border-radius: 16px;
  padding: 20px 22px;
  margin: 16px 0;
}

.danger-zone h3 { color: var(--danger); margin-top: 0; }

footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: space-between;
}

footer a { color: var(--muted); }

.placeholder {
  background: #FFF6DD;
  border: 1px solid #E9D48A;
  border-radius: 8px;
  padding: 1px 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16211D;
    --surface: #1E2B26;
    --surface-alt: #24332D;
    --text: #E9F2EF;
    --muted: #93A6A0;
    --accent: #6FCBB8;
    --accent-soft: #24443D;
    --danger: #E39189;
    --border: #2E3F38;
  }
  .btn { color: #12211C !important; }
  .btn.secondary { color: var(--accent) !important; }
  .placeholder { background: #3A311A; border-color: #6B5A2A; color: #F0DFA8; }
}