/* --------------------
   Base layout
-------------------- */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
  font-size: 16px;
}

/* --------------------
   App container
-------------------- */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

/* --------------------
   Navigation - Clean Green
-------------------- */
.main-nav {
  background: #2f5d3a;
  padding: 0.4rem 0;
  margin: 1rem auto 2.5rem auto;
  border-radius: 8px; /* rounded corners */
  max-width: 1100px; /* prevents full edge-to-edge */
}

.main-nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.main-nav a {
  color: #f4f7f4;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.2rem 0;
  position: relative;
  transition: opacity 0.2s ease;
}

.main-nav a:hover {
  opacity: 0.75;
}

/* --------------------
   Page content
-------------------- */
.page-content {
  padding: 1.25rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

/* --------------------
   Mobile tweaks
-------------------- */
@media (max-width: 600px) {
  .main-nav {
    padding: 0.3rem 0; /* reduced */
  }
  .main-nav {
    border-radius: 8px;
  }
  .main-nav ul {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem; /* smaller gap */
  }
  .main-nav a {
    font-size: 0.85rem; /* slightly smaller */
    padding: 0.15rem 0; /* less vertical padding */
  }
}