:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #111318;
  --muted: #5d6673;
  --line: #d8dde6;
  --accent: #146ef5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111318;
    --panel: #1b1f27;
    --text: #f3f5f8;
    --muted: #a7afbc;
    --line: #313846;
    --accent: #6aa2ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

article,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 20px;
}

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

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  margin: 32px 0 10px;
  font-size: 1.25rem;
}

p,
ul {
  margin: 0 0 14px;
}

li + li {
  margin-top: 6px;
}

.muted {
  color: var(--muted);
}

.placeholder {
  color: var(--accent);
  font-weight: 600;
}

footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}