:root {
  --ink: #1b1c1e;
  --ink-soft: #55575c;
  --canvas: #f6f6f4;
  --surface: #ffffff;
  --line: #ddddd8;
  --accent: #1e6b57;
  --accent-wash: #e1efea;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececea;
    --ink-soft: #b0b1ae;
    --canvas: #121312;
    --surface: #1b1c1b;
    --line: #30312f;
    --accent: #7fc8af;
    --accent-wash: #1d2f29;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #fff;
}

nav { display: flex; gap: 16px; }
nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }

h1 { font-size: 32px; line-height: 1.2; margin: 0 0 12px; font-weight: 650; }
h2 { font-size: 20px; line-height: 1.3; margin: 32px 0 8px; font-weight: 600; }
h3 { font-size: 17px; line-height: 1.35; margin: 24px 0 4px; font-weight: 600; }
p, li { color: var(--ink); }
.note ul { margin: 0; padding-left: 20px; }
.muted { color: var(--ink-soft); }
a { color: var(--accent); }

.lead { font-size: 18px; color: var(--ink-soft); margin: 0 0 32px; }

.features {
  list-style: none;
  padding: 0;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.features li {
  padding: 16px 20px;
  border-top: 1px solid var(--line);
}

.features li:first-child { border-top: 0; }
.features strong { display: block; font-weight: 600; }
.features span { color: var(--ink-soft); font-size: 15px; }

.note {
  background: var(--accent-wash);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 24px 0;
}

.table-wrap { overflow-x: auto; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; color: var(--ink-soft); }

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-soft);
}

@media (max-width: 480px) {
  header { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 28px; }
}