:root { --ink: #192d29; --muted: #66756f; --line: #e3e9e6; --green: #176b50; --green-dark: #0f3b2c; --lime: #c8f58b;
  font-family: 'Segoe UI', Arial, sans-serif; color: var(--ink); background: #f4f6f5; font-size: 15px; line-height: 1.65; }
* { box-sizing: border-box; }
body { margin: 0; }
header { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; padding: 16px max(20px, calc(50vw - 420px)); background: var(--green-dark); }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; letter-spacing: .08em; text-decoration: none; }
.mark { width: 32px; height: 32px; border-radius: 8px; background: var(--lime); color: var(--green-dark); display: grid; place-items: center; font-weight: 800; }
nav { display: flex; gap: 18px; }
nav a { color: #cfe0d6; text-decoration: none; font-size: 14px; }
nav a[aria-current="page"], nav a:hover { color: #fff; text-decoration: underline; }
main { max-width: 840px; margin: 32px auto; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 36px 44px; }
h1 { font-size: 30px; margin: 0; }
h2 { font-size: 18px; margin: 28px 0 8px; }
.updated { color: var(--muted); margin-top: 4px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--green); }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 0 20px 40px; }
@media (max-width: 640px) { main { margin: 16px; padding: 24px 20px; } h1 { font-size: 24px; } }