/* Simple styling for LessonCraft PHP version */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f7f7;
}

.app-header {
  background: #2c3e50;
  color: #fff;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-header h1 {
  margin: 0;
  font-size: 20px;
}

.user-info span {
  margin-right: 15px;
}

.user-info a.button {
  color: #fff;
  margin-left: 10px;
  text-decoration: none;
  padding: 6px 12px;
  background: #3498db;
  border-radius: 4px;
}

.user-info a.button:hover {
  background: #2980b9;
}

main {
  padding: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: left;
}
th {
  background: #eee;
}

.grid {
  display: flex;
  flex-wrap: wrap;
}
.grid label {
  flex: 1 1 200px;
  margin: 5px;
}
label input, label select, label textarea {
  width: 100%;
  padding: 6px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}
button {
  padding: 8px 14px;
  background: #3498db;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background: #2980b9;
}
.button {
  padding: 6px 12px;
  background: #3498db;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
}
.button.danger {
  background: #e74c3c;
}
.button.danger:hover {
  background: #c0392b;
}
.message {
  background: #dff0d8;
  color: #3c763d;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #d6e9c6;
  border-radius: 4px;
}
.error {
  background: #f2dede;
  color: #a94442;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ebccd1;
  border-radius: 4px;
}
.inline-form input[type="text"], .inline-form input[type="number"] {
  padding: 4px 8px;
  margin-right: 8px;
}