:root {
  --bg: #f5f7fb;
  --panel: #e9f0fa;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --accent: #2563eb;
  --on-accent: #ffffff;
  --border: #dbe3ef;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --panel: #1c1c1e;
    --card: #1c1c1e;
    --text: #f3f4f6;
    --muted: #a1a1aa;
    --accent: #60a5fa;
    --on-accent: #0b1220;
    --border: #2c2c2e;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.bar {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

nav { display: flex; gap: 1.25rem; }
nav a { text-decoration: none; font-weight: 600; }
nav a[aria-current="page"] { color: var(--text); }

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.25rem;
  line-height: 1.3;
  margin: 2.25rem 0 0.5rem;
}

h3 {
  font-size: 1.0625rem;
  margin: 1.5rem 0 0.25rem;
}

p, ul { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }

.lede { font-size: 1.1875rem; color: var(--muted); }
.updated { color: var(--muted); font-size: 0.9375rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.card p:last-child { margin-bottom: 0; }

.email {
  font-size: 1.1875rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  font-weight: 600;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
}

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

footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1rem 2.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
}