/* Cairnscope — plain CSS, no trackers, no cookies. */
:root {
  --teal: #0F766E;
  --teal-dark: #115E59;
  --teal-soft: #F0FDFA;
  --ink: #0F172A;
  --muted: #475569;
  --line: #E2E8F0;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --dot: #5EEAD4;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1.0625rem;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--teal);
  text-underline-offset: 0.15em;
}

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

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.bar {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.125rem;
}

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

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

.site-header nav {
  display: flex;
  gap: 0.25rem 1.25rem;
  flex-wrap: wrap;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.98rem;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--teal);
}

.site-header nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
}

.main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.main.wide {
  max-width: 960px;
}

h1, h2, h3 {
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h1 {
  font-size: 2rem;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.35rem;
  margin: 2.25rem 0 0.7rem;
}

h3 {
  font-size: 1.1rem;
  margin: 1.6rem 0 0.4rem;
}

p { margin: 0 0 1rem; }

.lede {
  font-size: 1.2rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.hero {
  padding: 1rem 0 2.5rem;
  max-width: 40rem;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 0.35rem;
}

.kicker {
  color: var(--teal);
  font-weight: 650;
  letter-spacing: 0.02em;
  margin: 0;
}

.prose ol, .prose ul {
  margin: 0 0 1.2rem;
  padding-left: 1.25rem;
}

.prose li { margin: 0.3rem 0; }

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  background: #F1F5F9;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  background: #0F172A;
  color: #F8FAFC;
  padding: 1rem 1.15rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.4rem 1.5rem 1.25rem;
}

.card h2, .card h3 { margin-top: 0; }

.shelf {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1rem 0 2.5rem;
}

.slot {
  border: 1px dashed var(--line);
  border-radius: 14px;
  min-height: 8.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: #F1F5F9;
  font-size: 0.95rem;
}

.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1rem 0 2.5rem;
}

.value {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.3rem;
}

.value h3 {
  margin: 0 0 0.4rem;
  color: var(--teal);
  font-size: 1.05rem;
}

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

.help-box {
  background: var(--teal-soft);
  border: 1px solid #99F6E4;
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
}

.help-box h2 { margin-top: 0; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  margin: 0.5rem 0 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 1.75rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p { margin: 0 0 0.4rem; }
.site-footer .fine { font-size: 0.85rem; margin-top: 0.6rem; }
.footer-links a { font-weight: 500; }

@media (max-width: 800px) {
  .shelf, .values { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.1rem; }
  h1 { font-size: 1.7rem; }
}