:root {
  --primary: #1E3A5F;
  --primary-soft: #E9EFF6;
  --accent: #2A7F8F;
  --text: #263238;
  --muted: #78909C;
  --border: #D5DDE5;
  --bg: #FFFFFF;
  --note-bg: #FFF8E1;
  --note-border: #F2C94C;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

header {
  background: var(--primary);
  color: #FFFFFF;
  padding: 20px 16px;
}

header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 24px; }
header a.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: #FFFFFF; font-size: 20px; font-weight: 700; text-decoration: none;
}
/* The logo tile is the same navy as the header, so a thin ring keeps its edge visible. */
header a.brand img { border-radius: 8px; box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.85); }
.hero-logo { display: block; margin: 8px 0 4px; }
header nav a { color: #FFFFFF; opacity: 0.85; margin-right: 16px; text-decoration: none; font-size: 15px; }
header nav a:hover, header nav a[aria-current="page"] { opacity: 1; text-decoration: underline; }

.wrap { max-width: 760px; margin: 0 auto; }
main { padding: 24px 16px 48px; }

h1 { color: var(--primary); font-size: 28px; line-height: 1.25; margin: 8px 0 4px; }
h2 { color: var(--primary); font-size: 20px; margin: 32px 0 8px; padding-bottom: 4px; border-bottom: 2px solid var(--accent); }
h3 { color: var(--primary); font-size: 17px; margin: 20px 0 4px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 16px; }

a { color: var(--accent); }
code { background: var(--primary-soft); padding: 1px 5px; border-radius: 3px; font-size: 14px; }
ul, ol { padding-left: 24px; }
li { margin: 4px 0; }

.note {
  background: var(--note-bg);
  border-left: 4px solid var(--note-border);
  padding: 12px 16px;
  margin: 16px 0;
}

table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 15px; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--primary-soft); color: var(--primary); }

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  padding: 16px;
}
footer a { color: var(--muted); margin-right: 16px; }