*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy: #182A3A; --gray: #64748B; --off-white: #F8FAFC; --white: #FFFFFF;
  --teal: #14B8A6; --teal-dark: #0F9486; --text: #172033; --cyan-light: #E0F2FE;
  --font: 'Atkinson Hyperlegible', sans-serif; --mono: 'Fira Code', monospace;
}
body { font-family: var(--font); line-height: 1.65; color: var(--text); background: var(--off-white); }
nav { background: var(--navy); padding: 0.875rem 2rem; display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 0.625rem; text-decoration: none; }
.nav-mark { width: 32px; height: 32px; border-radius: 6px; }
.nav-name { font-weight: 700; color: var(--white); }
.nav-name span { font-size: 0.8rem; color: #94A3B8; }
nav a.back { color: #CBD5E1; text-decoration: none; font-size: 0.9rem; }
main { max-width: 760px; margin: 0 auto; padding: 3rem 1.5rem 4rem; }
h1 { font-size: 2.1rem; line-height: 1.2; margin-bottom: 0.4rem; }
.meta { color: var(--gray); font-size: 0.9rem; margin-bottom: 2rem; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 0.6rem; }
p, ul { margin-bottom: 1rem; }
ul { padding-left: 1.4rem; }
li { margin-bottom: 0.4rem; }
a { color: var(--teal-dark); }
.summary { background: var(--cyan-light); border-left: 4px solid var(--teal); padding: 1.1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem; }
.summary h2 { margin-top: 0; font-size: 1.1rem; }
.summary ul { margin-bottom: 0; }
footer { background: #0F1E2B; padding: 1.5rem 2rem; text-align: center; }
footer p { font-size: 0.78rem; color: #94A3B8; font-family: var(--mono); margin: 0.25rem 0; }
footer a { color: var(--teal); text-decoration: none; }