:root {
  --teal: #0d9488;
  --teal-dark: #0f766e;
  --text: #1e293b;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --placeholder-bg: #fef3c7;
  --placeholder-border: #f59e0b;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell,
    "Noto Sans", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--teal-dark);
}

a:hover,
a:focus {
  color: var(--teal);
}

a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--card);
  padding: 0.85rem 1.25rem;
}

header.site .inner {
  max-width: 42rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--teal-dark);
  text-decoration: none;
}

.brand:hover {
  color: var(--teal);
}

nav a {
  margin-left: 1rem;
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:first-child {
  margin-left: 0;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
  color: var(--teal-dark);
}

h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.5rem;
  color: var(--text);
}

h3 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.35rem;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 1.25rem;
}

.meta p {
  margin: 0.15rem 0;
}

.lead {
  font-size: 1.05rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.25rem 1.35rem;
  margin: 1.25rem 0;
}

.card h2 {
  margin-top: 0;
}

.links {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.links li {
  margin: 0.75rem 0;
}

.links a {
  display: inline-block;
  font-weight: 600;
  text-decoration: none;
  padding: 0.65rem 1rem;
  border: 1px solid var(--teal);
  border-radius: 0.5rem;
  color: var(--teal-dark);
  background: #f0fdfa;
}

.links a:hover,
.links a:focus {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}

.placeholder {
  display: inline-block;
  background: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: 0.35rem;
  padding: 0.15rem 0.45rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  font-weight: 600;
}

.note {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

footer.site {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

footer.site a {
  color: var(--muted);
}