:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --ink: #17211d;
  --muted: #5c6a64;
  --line: #e2e0da;
  --accent: #0f6a5a;
  --accent-ink: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121714;
    --surface: #1a211d;
    --ink: #e9efeb;
    --muted: #9fb0a8;
    --line: #2a332e;
    --accent: #48b79f;
    --accent-ink: #0b1512;
  }
}

* {
  box-sizing: border-box;
}

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

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  height: 30px;
  width: auto;
}

.top nav {
  display: flex;
  gap: 18px;
}

.top nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

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

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

section {
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}

section:last-of-type {
  border-bottom: none;
}

h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}

h3 {
  font-size: 17px;
  margin: 0 0 8px;
}

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

p {
  margin: 0 0 14px;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
}

article p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

ul {
  padding-left: 20px;
  margin: 0 0 14px;
}

li {
  margin-bottom: 6px;
}

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer strong {
  color: var(--ink);
}