/* Modern Application Styles */

:root {
  /* Color palette */
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --secondary: #0787ae;
  --accent: #f72585;
  --success: rgb(5, 110, 5);
  --danger: rgb(191, 14, 14);
  --warning: #fbbf24;
  --light: #f9fafb;
  --dark: #1f2937;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  
  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Base styles */
body {
  font-family: var(--font-main);
  background-color: var(--gray-100);
  color: var(--dark);
  line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--dark);
}

h2 {
  font-size: 1.75rem;
  margin-top: var(--spacing-lg);
}

/* Card styling */
.card {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  background-color: var(--secondary);
  color: white;
  font-weight: 600;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: none;
}

.card-body {
  padding: var(--spacing-lg);
}

/* Button styling */
.btn {
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

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

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(67, 97, 238, 0.3);
}

/* Form elements */
.form-check {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  transition: background-color 0.2s ease;
}

.form-check:hover {  
  border-color: var(--gray-300);
}

.form-check-input {
  margin-top: 0.3rem;
}

.form-check-label {
  font-weight: 500;
  margin-left: var(--spacing-sm);
  cursor: pointer;
}

/* Custom radio buttons */
.form-check-input[type="radio"] {
  width: 1.2em;
  height: 1.2em;
  border: 2px solid var(--gray-400);
  transition: all 0.2s ease;
}

.form-check-input[type="radio"]:checked {
  background-color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.3);
}

/* Answer feedback styling */
.correct-answer {
  background-color: rgba(74, 222, 128, 0.2);
  border-left: 4px solid var(--success);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  animation: fadeIn 0.1s ease;
}

.wrong-answer {
  background-color: rgba(239, 68, 68, 0.2);
  border-left: 4px solid var(--danger);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  animation: fadeIn 0.1s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Container styling */
.container {
  max-width: 800px;
  padding: var(--spacing-xl);
  background-color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

/* Navigation */
.navbar {
  background-color: white;
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md) var(--spacing-xl);
}

.navbar-brand {
  font-weight: 600;
  color: var(--primary);
}

/* Alerts */
.alert {
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.alert-success {
  background-color: rgba(74, 222, 128, 0.2);
  color: #065f46;
  border-left: 4px solid var(--success);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.2);
  color: #991b1b;
  border-left: 4px solid var(--danger);
}

/* Question counter */
.question-correct-counter {
  display: inline-block;
  background-color: var(--success);
  color: white;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-left: var(--spacing-sm);
}

.question-incorrect-counter {
    display: inline-block;
    background-color: var(--danger);
    color: white;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    margin-left: var(--spacing-sm);
  }


/* Media queries for responsiveness */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
  
  .card-body {
    padding: var(--spacing-md);
  }

  .state-grid {
    grid-template-columns: 1fr;
  }
  
  h2 {
    font-size: 1.5rem;
  }
}

/* Test options styling */
.test-options {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.test-options .card {
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid var(--gray-300);
  border-radius: 10px;
  overflow: hidden;
}

.test-options .card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background-color: rgba(67, 97, 238, 0.05);
}

.test-options .card-body {
  padding: 1.5rem;
}

.test-options .card.selected {
  border-color: var(--primary);
  border-width: 2px;
  background-color: rgba(67, 97, 238, 0.05);
}

.test-options .card.selected .form-check-label strong {
  color: var(--primary);
}

.test-options .form-check {
  margin: 0;
  padding: 0;
}

.test-options .form-check-label {
  cursor: pointer;
  display: block;
  width: 100%;
}

/* State selection grid styling */
.state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
}

.state-box {
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 600;
  background-color: white;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.state-box:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background-color: rgba(67, 97, 238, 0.05);
}

.state-box.selected {
  border-color: var(--primary);
  background-color: rgba(67, 97, 238, 0.05);
  color: var(--primary);
}

/* Loading overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid var(--gray-200);
  border-top: 5px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}