/* Global */
html, body {
  min-width: 100%;
  min-height: 100%;
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: white;
  color: black;
  font-size: 16px;
  box-sizing: border-box;
  text-align: center;
}

.dark body {
  background: #111;
  color: white;
}

/* Header & Navigation */
header {
  background: #38a169;
  color: white;
  text-align: center;
  padding: .25rem;
  font-weight: bold;
  font-size: 1.5rem;
}

h2 {
  text-align: center;
  margin-bottom: 1rem;
}

nav {
  display: flex;
  flex-wrap: wrap; /* allow wrapping on small screens */
  justify-content: space-between;
  background: #e2e8f0;
  padding: 0.5rem;
}

nav button {
  flex: 1 1 25%; /* each button takes up 25% max, wraps if needed */
  min-width: 80px; /* prevents tiny buttons */
  padding: 0.5rem;
  cursor: pointer;
  background: none;
  border: none;
  font-weight: bold;
  box-sizing: border-box;
  transition: background 0.3s, color 0.3s;
}

nav button.active {
  background: #38a169;
  color: white;
}

main {
  min-height: calc(100vh - 3.5rem); /* adjust based on header + nav height */
  padding: 1rem;
  box-sizing: border-box;
  overflow-x: hidden;
}

/* --- Card Styles for Seed / Plant / Harvest --- */
.card {
  display: block;         /* ensure block-level */
  width: 100%;            /* full width */
  box-sizing: border-box;
  border-radius: 8px;
  border: 1px solid #ccc;
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  background: white;
}

.dark .card {
  background: #1a1a1a;
  border: 1px solid #333;
  box-shadow: 0 2px 5px rgba(255,255,255,0.05);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card ul {
  padding-left: 0.5rem;
  list-style: none;
  margin: 0.5rem 0 0 0;
}

.card input, 
.card select, 
.card button,
.card textarea {
  margin: 0.25rem 0.25rem 0.25rem 0;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  border: 1px solid #ccc;
  font-size: 0.9rem;
  box-sizing: border-box;
}

.dark .card input,
.dark .card select,
.dark .card button,
.dark .card textarea {
  border: 1px solid #555;
  background: #222;
  color: white;
}

.card button {
  cursor: pointer;
  background: #38a169;
  color: white;
  border: none;
  transition: background 0.2s;
}

.card button:hover {
  background: #2f855a;
}

/* --- Mobile Styles --- */
@media (max-width: 640px) {
  body {
    font-size: 18px;
  }

  header {
    font-size: 1.25rem;
    padding: 0.75rem;
  }

  nav button {
    padding: 0.75rem;
    font-size: 1rem;
  }

  main {
    padding: 0.5rem;
  }

  .card {
    padding: 0.75rem;
  }

  .card h3 {
    font-size: 1.05rem;
  }

  .card input,
  .card select,
  .card button,
  .card textarea {
    font-size: 1rem;
    padding: 0.5rem;
  }

  .card textarea {
    min-height: 3rem;
  }
}