body {
  font-family: Arial, sans-serif;
  background: #f7f9fc;
  margin: 30px;
}

/* Section box */
.section {
  border-radius: 10px;
  margin-bottom: 15px;
  overflow: hidden;
  border: 1px solid #ddd;
}

/* Section headers */
.section-header {
  padding: 14px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Section content */
.section-content {
  padding: 15px;
  display: none;
  background: #ffffff;
}

/* Pastel header colors */
.basic-header { background: #e3f2fd; }
.question-header { background: #e8f5e9; }
.learning-header { background: #fff8e1; }
.advanced-header { background: #f3e5f5; }

/* Tags */
.tag {
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 10px;
}

.essential {
  background: #ffebee;
  color: #c62828;
}

.recommended {
  background: #e3f2fd;
  color: #1565c0;
}

.optional {
  background: #eeeeee;
  color: #555;
}

/* Button */
button {
  background: #1976d2;
  color: white;
  padding: 12px 20px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #0d47a1;
}

body {
  font-family: Arial;
  margin: 40px;
  background: #f7f9fc;
}

.question-box {
  background: white;
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #ddd;
  margin-bottom: 20px;
  font-size: 18px;
}

.button {
  padding: 10px 16px;
  margin: 5px;
  border: none;
  border-radius: 6px;
  color: white;
  font-size: 14px;
  cursor: pointer;
}

.accept { background: #4caf50; }
.reject { background: #e53935; }
.edit { background: #fb8c00; }
.easy { background: #1e88e5; }
.similar { background: #8e24aa; }
.context { background: #6d4c41; }
.skip { background: #757575; }