:root {
  --green: #17a34a;
  --dark: #132015;
  --muted: #5f6b63;
  --bg: #f5f8f5;
  --card: #ffffff;
  --line: #dfe8df;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.65;
}
header {
  background: linear-gradient(135deg, #0f8f3a, #21c15d);
  color: white;
  padding: 36px 18px;
  text-align: center;
}
header h1 { margin: 0; font-size: 34px; }
header p { margin: 8px auto 0; max-width: 760px; }
nav {
  background: white;
  border-bottom: 1px solid var(--line);
  padding: 12px 18px;
  text-align: center;
}
nav a { margin: 0 10px; color: var(--green); font-weight: 700; text-decoration: none; }
.container {
  max-width: 980px;
  margin: 24px auto;
  padding: 0 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px;
  margin-bottom: 18px;
  box-shadow: 0 10px 26px rgba(0,0,0,.04);
}
h2 { margin-top: 0; color: #0f7c35; }
h3 { color: #174c25; margin-top: 26px; }
a { color: var(--green); }
.btn {
  display: inline-block;
  background: var(--green);
  color: white;
  padding: 12px 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
}
.notice {
  background: #eefaf0;
  border-left: 5px solid var(--green);
  padding: 14px 16px;
  border-radius: 10px;
}
footer {
  text-align: center;
  padding: 24px 18px;
  color: var(--muted);
  font-size: 14px;
}
ul { padding-left: 22px; }