/* atrlabs.app — same editorial palette as the Focus app. */
:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --ink: #111111;
  --secondary: #5F5F5F;
  --border: #E8E8E5;
  --fill: #F1F1EE;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111111; --surface: #1A1A1A; --ink: #F2F2EF; --secondary: #A8A8A3; --border: #2C2C2A; --fill: #1E1E1C; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
header.site { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 24px; border-bottom: 1px solid var(--border); margin-bottom: 32px; }
header.site a.brand { color: var(--ink); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
nav a { color: var(--secondary); text-decoration: none; margin-left: 16px; font-size: 15px; }
nav a[aria-current="page"], nav a:hover { color: var(--ink); }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, li { color: var(--ink); }
.meta { color: var(--secondary); font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 24px; }
.lede { font-size: 19px; color: var(--secondary); }
.summary { background: var(--fill); border-radius: 14px; padding: 18px 20px; margin: 24px 0; }
.summary ul { margin: 8px 0 0; padding-left: 20px; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--secondary); font-weight: 600; }
a { color: var(--ink); text-underline-offset: 3px; }
footer.site { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--secondary); font-size: 14px; display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }
footer.site a { color: var(--secondary); }
.cta { display: inline-block; background: var(--ink); color: var(--bg); padding: 14px 20px; border-radius: 14px; text-decoration: none; font-weight: 600; }
@media (max-width: 480px) { h1 { font-size: 28px; } nav a { margin-left: 12px; } }

.crumb { color: var(--secondary); font-weight: 500; margin-left: 4px; }
.applist { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 12px; }
.applist li { border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; background: var(--surface); }
.applist strong { display: block; margin-bottom: 4px; }