/* Nature theme variables */
:root {
  --green-700: #2f6f44;
  --green-500: #4a9a65;
  --beige: #f3efd9;
  --earth: #8c6b4a;
  --muted: #6b6b6b;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--beige) 0%, #fff 100%);
  color: #213127;
  min-height: 100vh;
  line-height: 1.6;
}
.container {
  width: min(92%, 900px);
  margin: 0 auto;
}
.site-header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(34,34,34,0.04);
  position: sticky;
  top: 0;
  z-index: 1002;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}
.logo {
  font-size: 1.3rem;
  color: var(--green-700);
  font-weight: 700;
}
.top-nav {
  flex: 1;
}
.nav-list {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  color: var(--earth);
  text-decoration: none;
  font-size: 1.05rem;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  transition: background 0.18s, color 0.18s;
}
.nav-list a:hover {
  background: var(--green-500);
  color: #fff;
}
.btn {
  display: inline-block;
  background: transparent;
  color: var(--earth);
  border: 2px solid var(--earth);
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  margin-top: 1.2rem;
  transition: background 0.18s, color 0.18s, transform 0.12s;
}
.btn:hover {
  background: var(--green-500);
  color: #fff;
  transform: translateY(-2px);
}
.btn-primary {
  background: var(--green-500);
  color: #fff;
  border-color: var(--green-500);
}
.section {
  padding: 2.5rem 0 2rem 0;
}
.section h2 {
  color: var(--green-700);
  margin-bottom: 0.7rem;
}
.contact-form {
  display: grid;
  gap: 0.8rem;
  max-width: 500px;
}
.contact-form input,
.contact-form textarea {
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #d6d6d6;
}
.site-footer {
  background: #f1f2ef;
  padding: 1.25rem 0;
  margin-top: 2rem;
}
.footer-inner {
  text-align: center;
  color: var(--muted);
  font-size: 0.98rem;
}
/* Responsive styles */
@media (max-width: 700px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }
  .nav-list {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}

.quiz-box {
  max-width: 600px;
  margin: 40px auto;
  padding: 25px;
  background-color: #f4f1e6;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  text-align: center;
}

.answer-btn {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  border: none;
  background-color: #2e7d32;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

.answer-btn:hover {
  background-color: #1b5e20;
}