:root {
  --bg: #12263A;
  --sheet: #17304A;
  --paper: #F7F5F1;
  --ink: #EDF1F7;
  --muted: #9AA7BA;
  --body: #C7D0DC;
  --accent: #E8A33D;
  --line: #25364F;
}
* { box-sizing: border-box }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, system-ui, sans-serif;
  line-height: 1.62;
}
main { max-width: 720px; margin: 0 auto; padding: 60px 24px 96px }

/* The app icon's own geometry, inline. An earlier CSS-only version drew the
   roof with a clip-path on a pseudo-element and rendered as a nub. */
.mark { display: block; width: 46px; height: 46px; margin-bottom: 26px }

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600; letter-spacing: -0.5px; font-size: 34px; margin: 0 0 4px;
}
.sub {
  color: var(--muted); margin: 0 0 36px; letter-spacing: 3px;
  font-size: 12px; text-transform: uppercase;
}
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600; font-size: 20px; margin: 34px 0 8px; letter-spacing: -0.2px;
}
p, li { color: var(--body) }
li { margin-bottom: 6px }
strong { color: var(--ink) }
a { color: var(--accent) }
.card {
  background: var(--sheet); border: 1px solid var(--line);
  padding: 18px 22px; margin: 22px 0; border-radius: 10px;
}
.card.rule { border-left: 3px solid var(--accent) }
nav { margin-bottom: 30px; font-size: 14px }
nav a { margin-right: 18px; text-decoration: none }
nav a:hover { text-decoration: underline }
.foot {
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--line); margin-top: 44px; padding-top: 14px;
}
table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top }
th { color: var(--ink); font-size: 13px; text-transform: uppercase; letter-spacing: 1px }
td { color: var(--body) }