/* Guide pages: the app's Flight Deck look, kept light enough for long reading.
   Follows the reader's light or dark setting. No scripts, one stylesheet. */
@font-face { font-family: "Space Grotesk"; src: url("/assets/fonts/space-grotesk.woff2") format("woff2"); font-weight: 300 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/assets/fonts/jetbrains-mono.woff2") format("woff2"); font-weight: 100 800; font-display: swap; }

:root {
  --bg: #f3f1ea; --surface: #ffffff; --surface-2: #f6f4ee; --text: #0e1a2b; --muted: #4a5568;
  --accent: #0b6bc2; --accent-strong: #08508f; --cta: #f5a524; --on-cta: #1a1203;
  --border: #e1ddd2; --grid: rgba(14, 26, 43, .045); --magenta: #a8237e;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-body);
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #060a12; --surface: #0c1421; --surface-2: #111b2b; --text: #e8eef6; --muted: #9aa8bc;
    --accent: #3dd5ff; --accent-strong: #8be6ff; --cta: #ffb020; --border: #1b283a; --grid: rgba(120, 170, 220, .05); --magenta: #e35ab5;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; color: var(--text); font: 17px/1.7 var(--font-body); -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(900px 500px at 90% -10%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 60%),
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 96px 96px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 96px 96px,
    var(--bg);
}
header.site, main, footer { max-width: 780px; margin: 0 auto; padding: 0 20px; }
header.site { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 18px; padding-bottom: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font: 700 1.12rem var(--font-display); letter-spacing: -.02em; text-decoration: none; }
.badge { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 11px; background: linear-gradient(145deg, #13243b, #070d18); color: #ffb020; box-shadow: 0 0 0 1px rgba(61, 213, 255, .28) inset; }
.badge svg { width: 24px; height: 24px; }
.cta { display: inline-flex; align-items: center; min-height: 42px; padding: 0 18px; border-radius: 12px; background: var(--cta); color: var(--on-cta); font-weight: 700; text-decoration: none; box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--cta) 80%, transparent); }
nav.crumbs { margin-top: 18px; color: var(--muted); font: 600 .74rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
nav.crumbs a { color: var(--accent-strong); text-decoration: none; }
h1 { margin: .5em 0 .3em; font: 600 clamp(2rem, 5vw, 3rem)/1.06 var(--font-display); letter-spacing: -.035em; }
h2 { margin: 1.9em 0 .45em; font: 600 1.45rem/1.25 var(--font-display); letter-spacing: -.02em; }
.intro { font-size: 1.14rem; color: var(--muted); }
a { color: var(--accent-strong); }
@media (prefers-color-scheme: dark) { a, nav.crumbs a { color: var(--accent); } }
table { width: 100%; margin: 1em 0; border-collapse: collapse; font-size: .95rem; background: var(--surface); border-radius: 12px; overflow: hidden; }
th, td { padding: 8px 12px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: var(--surface-2); font: 600 .78rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.q { margin: 18px 0; padding: 18px 20px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); box-shadow: 0 14px 34px -24px rgba(14, 26, 43, .35); }
.stem { font-weight: 650; }
.q ol { padding-left: 1.4em; }
details { margin-top: 10px; }
summary { cursor: pointer; color: var(--accent-strong); font-weight: 700; }
@media (prefers-color-scheme: dark) { summary { color: var(--accent); } }
figure { margin: 12px 0; }
figure img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); }
figcaption, .lead { color: var(--muted); font: 600 .8rem var(--font-mono); letter-spacing: .02em; }
.box { margin: 2em 0; padding: 16px 20px; border: 1px solid var(--border); border-left: 4px solid var(--magenta); border-radius: 12px; background: var(--surface); }
footer { margin-top: 40px; padding-top: 28px; padding-bottom: 44px; border-top: 1px solid var(--border); color: var(--muted); font-size: .88rem; }
footer a { margin-right: 14px; color: var(--muted); }