/* Global Styles */
:root {
  --primary-color: #4285f4;
  --secondary-color: #34a853;
  --danger-color: #ea4335;
  --warning-color: #fbbc05;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #757575;
  --text-color: #333;
  --white: #ffffff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: #f9f9f9;
}

h1, h2, h3, h4 {
  margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: var(--primary-color);
}

/* Layout */
header {
  background-color: var(--white);
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

main {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Cards */
.card {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.exam-card, .question-card {
  transition: transform 0.2s;
}

.exam-card:hover, .question-card:hover {
  transform: translateY(-5px);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--medium-gray);
  border-radius: 4px;
  font-size: 1rem;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: #3367d6;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: white;
}

.btn-secondary:hover {
  background-color: #2d9249;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.alert.error {
  background-color: #fde8e8;
  color: var(--danger-color);
}

.alert.success {
  background-color: #e6f4ea;
  color: var(--secondary-color);
}

/* Status indicators */
.status {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
}

.status.available {
  background-color: #e6f4ea;
  color: var(--secondary-color);
}

.status.assigned {
  background-color: #fde8e8;
  color: var(--danger-color);
}

/* Question sections */
.question-section {
  margin-bottom: 1.5rem;
}

.question-section h4 {
  margin-bottom: 0.5rem;
  color: var(--dark-gray);
}

/* Back link */
.back-link {
  margin-bottom: 1.5rem;
}

.back-link a {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
}

/* User info */
.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* No content messages */
.no-exams, .no-questions {
  color: var(--dark-gray);
  font-style: italic;
  padding: 1rem 0;
}

/* Exam actions */
.exam-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
}

/* Hint text */
.hint {
  color: var(--dark-gray);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}