:root {
  --green: #859f49;
  --green-dark: #455024;
  --yellow: #ffde59;
  --paper: #ffffff;
  --background: #f5f7ef;
  --text: #20251a;
  --muted: #66705b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
header {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: white;
  padding: 28px 20px;
}
header div, main, footer { max-width: 880px; margin: 0 auto; }
header h1 { margin: 0; font-size: clamp(1.55rem, 4vw, 2.35rem); }
header p { margin: 6px 0 0; opacity: .9; }
nav { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
nav a {
  color: var(--green-dark);
  background: var(--yellow);
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
}
main {
  margin-top: 24px;
  margin-bottom: 24px;
  padding: clamp(20px, 4vw, 42px);
  background: var(--paper);
  border-radius: 22px;
  box-shadow: 0 12px 36px rgba(69, 80, 36, .1);
}
h2 { margin-top: 32px; color: var(--green-dark); }
h2:first-child { margin-top: 0; }
a { color: #526d19; }
.notice {
  background: #fff8d8;
  border-left: 5px solid var(--yellow);
  padding: 14px 16px;
  border-radius: 10px;
}
.button {
  display: inline-block;
  background: var(--green-dark);
  color: white;
  padding: 11px 18px;
  border-radius: 12px;
  font-weight: 800;
  text-decoration: none;
}
footer { padding: 0 20px 32px; color: var(--muted); font-size: .9rem; }
@media (max-width: 920px) { main { margin: 14px; } }