:root { color-scheme: light; --ink: #203044; --muted: #596574; --accent: #126d98; --border: #dce3e9; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #fff; font: 16px/1.75 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); text-underline-offset: 4px; }
a:hover { color: #173b6c; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.lab-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 24px max(24px, calc((100vw - 1040px)/2)); background: #040b14; color: #fff; }
.lab-header a { color: #fff; }
.lab-brand { font-size: 20px; font-weight: 650; text-decoration: none; }
.lab-wrap { max-width: 1040px; margin: auto; padding: 0 24px; }
.lab-intro { padding: 64px 0 40px; max-width: 790px; }
.lab-eyebrow { color: var(--accent); font-size: 14px; letter-spacing: .1em; text-transform: uppercase; }
h1 { font-size: clamp(34px, 6vw, 54px); line-height: 1.15; letter-spacing: -.025em; margin: 12px 0 24px; }
h2 { font-size: 28px; line-height: 1.3; color: #173b6c; }
h3 { font-size: 19px; margin-top: 0; line-height: 1.4; }
.lab-lead { font-size: 22px; line-height: 1.6; }
.lab-section { border-top: 1px solid var(--border); padding: 32px 0 40px; }
.lab-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin: 24px 0; }
.lab-card { padding: 24px; background: #f5f8fd; border-radius: 8px; }
.lab-card p { margin-bottom: 0; }
.lab-muted, caption { color: var(--muted); font-size: 14px; }
.lab-table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; text-align: left; }
caption { text-align: left; padding: 12px 0; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
thead { background: #f5f8fd; }
tbody th { font-weight: 500; }
code { font-size: 14px; overflow-wrap: anywhere; }
.lab-footer { background: #f5f8fd; padding: 24px; text-align: center; font-size: 14px; }
.lab-skip { position: fixed; top: -100px; left: 16px; padding: 12px 20px; background: white; z-index: 10; }
.lab-skip:focus { top: 16px; }
@media (max-width: 700px) { .lab-header { flex-direction: column; align-items: flex-start; gap: 8px; } .lab-grid { grid-template-columns: 1fr; } .lab-intro { padding-top: 40px; } th, td { padding: 12px 8px; } }