:root {
  --bg: #ffffff;
  --surface: #faf6f3;
  --text: #1e1e1e;
  --muted: #5c5752;
  --border: #ece4de;
  --primary: #de5216;
  --primary-soft: #fbe6dc;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141210;
    --surface: #1e1b18;
    --text: #f2eeea;
    --muted: #b3aba4;
    --border: #2f2a26;
    --primary: #ff7a3d;
    --primary-soft: #3a2418;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px / 1.6 system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
}

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

header.top {
  border-bottom: 1px solid var(--border);
}

header.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
}

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

nav a {
  margin-left: 16px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

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

main {
  padding: 40px 0 56px;
}

h1 {
  font-size: 36px;
  line-height: 1.2;
  margin: 0 0 16px;
}

h2 {
  font-size: 22px;
  margin: 40px 0 12px;
}

h3 {
  font-size: 18px;
  margin: 24px 0 8px;
}

.lead {
  font-size: 20px;
  color: var(--muted);
  margin: 0 0 32px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

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

.card h3 {
  margin-top: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.note {
  background: var(--primary-soft);
  border-radius: 14px;
  padding: 20px;
  margin: 32px 0;
}

.meta {
  color: var(--muted);
  font-size: 15px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  font-size: 15px;
}

footer a {
  color: var(--muted);
  margin-right: 16px;
}