* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #fff;
}

/* ── HEADER ── */
header {
  background-color: #2e6b4e;
  padding: 10px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-img {
  height: 80px;
  width: auto;
  max-width: 100%;
}

/* ── NAV ── */
nav {
  background-color: #fff;
  border-bottom: 2px solid #2e6b4e;
  overflow-x: auto;
}

nav ul {
  display: flex;
  list-style: none;
  padding: 0 20px;
  min-width: max-content;
}

nav ul li a {
  display: block;
  padding: 14px 16px;
  color: #1b3a2d;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: background 0.2s, color 0.2s;
}

nav ul li a:hover {
  color: #2e6b4e;
  border-bottom-color: #2e6b4e;
}

nav ul li a.active {
  color: #2e6b4e;
  border-bottom-color: #2e6b4e;
  background: #f0f7f3;
}

/* ── MAIN ── */
main {
  flex: 1;
  padding: 40px 60px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.section {
  display: block;
}

.section h2 {
  font-size: 1.8rem;
  color: #1b3a2d;
  font-weight: 700;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e0ede6;
}

.section-body {
  margin-top: 24px;
  min-height: 200px;
  color: #888;
  font-size: 0.95rem;
  font-style: italic;
}

/* ── FOOTER ── */
footer {
  background-color: #2e6b4e;
  color: #fff;
  text-align: center;
  padding: 18px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}