:root { --ink: #1d2530; --accent: #0f6b8c; --bg: #f7f9fb; --card: #ffffff; }
* { box-sizing: border-box; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
header {
  background: var(--card);
  border-bottom: 1px solid #e3e8ee;
  padding: 1.2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .8rem;
}
h1 { font-size: 1.5rem; letter-spacing: .03em; color: var(--accent); }
nav a { margin-right: 1rem; color: var(--ink); text-decoration: none; font-weight: 500; }
nav a:hover { color: var(--accent); }
main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
section, main > p {
  background: var(--card);
  border: 1px solid #e3e8ee;
  border-radius: 10px;
  padding: 1.6rem 1.8rem;
  margin-bottom: 1.4rem;
}
h2 { margin-bottom: .8rem; font-size: 1.25rem; }
p + p { margin-top: .7rem; }
ul { padding-left: 1.3rem; }
li { margin: .35rem 0; }
a { color: var(--accent); }
footer {
  text-align: center;
  padding: 1.6rem;
  color: #6a7683;
  font-size: .9rem;
}