:root {
  --ink: #16181c;
  --muted: #5c6672;
  --line: #e4e7ec;
  --bg: #ffffff;
  --panel: #f7f8fa;
  --accent: #1f7a4d;
  --accent-soft: #eaf5ef;
  --radius: 14px;
  --wrap: 40rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eceef2;
    --muted: #9aa4b2;
    --line: #2a2f38;
    --bg: #101215;
    --panel: #171a1f;
    --accent: #4ec98a;
    --accent-soft: #16261e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 1.25rem;
}

header.site {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.05rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1.1rem;
  font-size: 0.94rem;
}

nav a:hover { color: var(--ink); }

h1 {
  font-size: 2.1rem;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 2.5rem 0 0.75rem;
}

h2 {
  font-size: 1.25rem;
  letter-spacing: -0.015em;
  margin: 2.25rem 0 0.6rem;
}

h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.35rem;
}

p { margin: 0 0 1rem; }

.lede {
  font-size: 1.12rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

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

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.7rem 1.15rem;
  border-radius: 10px;
}

.btn:hover { filter: brightness(1.08); }

.btn.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.25rem 0;
}

.panel h3 { margin-top: 0; }

ul.plain {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

ul.plain li {
  padding: 0.45rem 0 0.45rem 1.5rem;
  position: relative;
}

ul.plain li::before {
  content: "";
  position: absolute;
  left: 0.25rem;
  top: 1.05rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th { font-weight: 600; }

code {
  background: var(--accent-soft);
  color: var(--ink);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
  font-size: 0.9em;
}

.tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
}

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 3.5rem;
  padding: 1.75rem 0 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.stat-row {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 2rem;
}

.stat b {
  display: block;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.stat span {
  color: var(--muted);
  font-size: 0.88rem;
}