:root { color-scheme: dark; --bg: #0a0d14; --text: #E8ECF5; --dim: #8B93A6; --line: rgba(255,255,255,0.10); --accent: #56B4E9; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; padding: 0 1.25rem 4rem; }
main, header, footer { max-width: 40rem; margin: 0 auto; }
header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.5rem 0 1rem; border-bottom: 1px solid var(--line); }
header .brand { display: flex; align-items: center; gap: .7rem; color: var(--text); text-decoration: none; font-weight: 800; font-size: 1.1rem; letter-spacing: .04em; text-transform: uppercase; }
/* the app icon (the keeper trio), whole, in a rounded tile */
header .brand .logo { width: 40px; height: 40px; overflow: hidden; border-radius: 10px; flex: none; }
header .brand .logo img { display: block; width: 40px; height: 40px; }
nav a { color: var(--dim); text-decoration: none; margin-left: 1rem; }
nav a[aria-current="page"], nav a:hover { color: var(--text); }
h1 { font-size: 2rem; line-height: 1.15; margin: 2rem 0 .5rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .4rem; color: var(--text); }
p, li { color: var(--text); }
p.lead { color: var(--dim); font-size: 1.15rem; margin-top: 0; }
a { color: var(--accent); }
ul { padding-left: 1.2rem; }
dl dt { font-weight: 700; margin-top: 1rem; }
dl dd { margin: .2rem 0 0; color: var(--dim); }
.muted { color: var(--dim); }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.2rem; margin: 1.5rem 0; }
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 1rem; color: var(--dim); font-size: .9rem; }
footer a { color: var(--dim); }