/* Shared shell for the static guide pages. Kept as one small file so the
   articles stay plain HTML that Cloudflare Pages can serve without a build. */
:root {
  --bg: #040c1a;
  --panel: #05142b;
  --line: rgba(34, 211, 238, 0.22);
  --ink: #e6f6ff;
  --muted: #93b8cc;
  --cyan: #22d3ee;
  --teal: #2dd4bf;
  --amber: #fbbf24;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% -10%, rgba(34, 211, 238, 0.16), transparent 45%),
    radial-gradient(circle at 90% 0%, rgba(251, 191, 36, 0.1), transparent 40%),
    var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

a { color: var(--cyan); }
a:focus-visible { outline: 2px solid var(--amber); outline-offset: 4px; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 10; padding: 0.6rem 1rem; background: var(--panel); }
.skip-link:focus { top: 0.5rem; }
.breadcrumbs { margin: 1.5rem 0; font-size: 0.75rem; color: var(--muted); }
.breadcrumbs a { text-decoration: none; }

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }

.topbar {
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  background: rgba(4, 12, 26, 0.8);
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0.85rem 1.25rem;
}

.brand {
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  font-size: 0.8rem;
}

.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a:hover { color: var(--cyan); }

main { padding: 2.5rem 0 1rem; }

.eyebrow {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0.6rem 0 0.9rem;
  overflow-wrap: anywhere;
}

.standfirst { font-size: 1.05rem; color: var(--muted); margin: 0 0 1rem; }

.meta {
  font-size: 0.75rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.6rem 0;
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.75rem;
  padding-top: 0.25rem;
}

h3 { font-size: 1.08rem; margin: 1.75rem 0 0.4rem; }

p, li { color: #d3ecf8; }

ul, ol { padding-left: 1.2rem; }
li { margin: 0.4rem 0; }

strong { color: #fff; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86em;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  overflow-wrap: anywhere;
}

pre { max-width: 100%; overflow-x: auto; padding: 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
pre code { background: none; border: 0; padding: 0; }
.table-wrap { overflow-x: auto; }

.callout {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  font-size: 0.94rem;
}

.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  background: linear-gradient(120deg, #031d42, #042858 55%, #011430);
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  margin: 2.5rem 0;
}

.cta p { margin: 0; flex: 1 1 16rem; font-size: 0.92rem; color: var(--muted); }

.button {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--cyan), var(--teal));
  color: #04121f;
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  white-space: nowrap;
}

.button.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--cyan);
}

table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.88rem; }
th, td { text-align: left; padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--line); }
th { color: var(--teal); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  text-decoration: none;
  display: block;
}

.card:hover { border-color: rgba(34, 211, 238, 0.55); }
.card strong { display: block; color: #fff; font-size: 0.95rem; }
.card span { display: block; color: var(--muted); font-size: 0.82rem; margin-top: 0.25rem; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 1.75rem 0 3rem;
  font-size: 0.8rem;
  color: var(--muted);
}

footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.1rem; margin-top: 0.75rem; }
footer nav a { color: var(--muted); text-decoration: none; }
footer nav a:hover { color: var(--cyan); }