:root {
  --bg: #f7f5ef;
  --surface: #ffffff;
  --text: #1d2420;
  --muted: #5b6660;
  --border: #e3dfd4;
  --accent: #2b7f63;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121614;
    --surface: #1b211e;
    --text: #e8ece9;
    --muted: #a3ada8;
    --border: #2c3430;
    --accent: #5cc29e;
  }
}

* {
  box-sizing: border-box;
}

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

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

header img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
}

h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
}

header p {
  margin: 4px 0 0;
  color: var(--muted);
}

h2 {
  margin: 36px 0 8px;
  font-size: 20px;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
}

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

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 15px;
}