/* ============================================================================
   PATHFINDER LEADERSHIP AWARD WEB COURSE CMS - STYLESHEET
   ============================================================================ */

/* ============================================================================
   1. CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================================================ */

:root {
  /* Brand Colors */
  --primary-blue: #003F72;
  --secondary-blue: #0077B3;
  --red-accent: #C41230;
  --gold-accent: #D4A843;
  --white: #FFFFFF;
  --light-gray: #F5F5F5;
  --medium-gray: #E0E0E0;
  --dark-text: #333333;
  --success-green: #28a745;
  --warning-orange: #fd7e14;
  --error-red: #dc3545;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue',
    sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --line-height-base: 1.6;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index scale */
  --z-dropdown: 1000;
  --z-modal: 2000;
  --z-tooltip: 3000;
}

/* ============================================================================
   2. RESET & BASE STYLES
   ============================================================================ */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--dark-text);
  background-color: var(--light-gray);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ============================================================================
   3. TYPOGRAPHY
   ============================================================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--primary-blue);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.1rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--secondary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-blue);
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* ============================================================================
   4. NAVIGATION
   ============================================================================ */

nav {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-dropdown);
  box-shadow: var(--shadow-md);
}

nav a {
  color: var(--white);
}

nav a:hover {
  color: var(--gold-accent);
  text-decoration: none;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-menu li a {
  padding: var(--spacing-sm) var(--spacing-md);
  display: block;
  transition: all var(--transition-fast);
}

.nav-menu li a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
}

.nav-hamburger span {
  width: 25px;
  height: 3px;
  background-color: var(--white);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-base);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ============================================================================
   5. LAYOUT & CONTAINERS
   ============================================================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

main {
  padding: var(--spacing-3xl) 0;
}

.section {
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  margin-bottom: var(--spacing-xl);
}

/* ============================================================================
   6. CARDS
   ============================================================================ */

.card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--medium-gray);
  margin: calc(-1 * var(--spacing-xl)) calc(-1 * var(--spacing-xl))
    var(--spacing-lg) calc(-1 * var(--spacing-xl));
}

.card-header h2,
.card-header h3 {
  margin-bottom: 0;
}

.card-body {
  padding: var(--spacing-lg) 0;
}

.card-footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--medium-gray);
  margin-top: var(--spacing-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--light-gray);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-blue);
}

.card-title {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--dark-text);
  margin-bottom: 0;
}

/* ============================================================================
   7. GRID LAYOUT
   ============================================================================ */

.grid {
  display: grid;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Course grid specific */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.course-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.course-card-header {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: var(--spacing-xl);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.course-card-body {
  padding: var(--spacing-lg);
  flex: 1;
}

.course-card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--medium-gray);
}

/* ============================================================================
   8. FORMS
   ============================================================================ */

.form-container {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-2xl);
  max-width: 400px;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--dark-text);
}

input[type='text'],
input[type='email'],
input[type='password'],
input[type='number'],
input[type='date'],
input[type='time'],
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  transition: all var(--transition-fast);
}

input[type='text']:focus,
input[type='email']:focus,
input[type='password']:focus,
input[type='number']:focus,
input[type='date']:focus,
input[type='time']:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--secondary-blue);
  box-shadow: 0 0 0 3px rgba(0, 119, 179, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input[type='checkbox'],
input[type='radio'] {
  margin-right: var(--spacing-sm);
  cursor: pointer;
}

.checkbox-group,
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.checkbox-item,
.radio-item {
  display: flex;
  align-items: center;
}

.checkbox-item label,
.radio-item label {
  margin-bottom: 0;
  margin-left: var(--spacing-sm);
  cursor: pointer;
  font-weight: 400;
}

.form-error {
  color: var(--error-red);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-sm);
}

.form-hint {
  color: #666;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-sm);
}

/* ============================================================================
   9. BUTTONS
   ============================================================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--red-accent);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) {
  background-color: #a00d25;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--primary-blue);
  color: var(--white);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #002a4f;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(0);
}

/* Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--secondary-blue);
  border: 2px solid var(--secondary-blue);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--secondary-blue);
  color: var(--white);
}

/* Success Button */
.btn-success {
  background-color: var(--success-green);
  color: var(--white);
}

.btn-success:hover:not(:disabled) {
  background-color: #218838;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Warning Button */
.btn-warning {
  background-color: var(--warning-orange);
  color: var(--white);
}

.btn-warning:hover:not(:disabled) {
  background-color: #e86b00;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Danger Button */
.btn-danger {
  background-color: var(--error-red);
  color: var(--white);
}

.btn-danger:hover:not(:disabled) {
  background-color: #bd2130;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* Button Block */
.btn-block {
  display: block;
  width: 100%;
}

/* ============================================================================
   10. QUIZ STYLES
   ============================================================================ */

.quiz-container {
  max-width: 700px;
  margin: 0 auto;
}

.question-card {
  background-color: var(--white);
  border-left: 4px solid var(--primary-blue);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.question-number {
  color: var(--secondary-blue);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
}

.question-text {
  color: var(--dark-text);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-lg);
}

.options-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.option-item {
  display: flex;
  align-items: flex-start;
  padding: var(--spacing-md);
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.option-item:hover {
  background-color: var(--light-gray);
  border-color: var(--secondary-blue);
}

.option-item input[type='radio'],
.option-item input[type='checkbox'] {
  flex-shrink: 0;
  margin-top: 2px;
}

.option-label {
  margin-left: var(--spacing-md);
  cursor: pointer;
  flex: 1;
}

.option-item input[type='radio']:checked ~ .option-label,
.option-item input[type='checkbox']:checked ~ .option-label {
  font-weight: 500;
  color: var(--primary-blue);
}

.option-item input[type='radio']:checked + .option-label,
.option-item input[type='checkbox']:checked + .option-label {
  color: var(--primary-blue);
}

.question-card.selected {
  border-left-color: var(--secondary-blue);
  background-color: rgba(0, 119, 179, 0.02);
}

/* ============================================================================
   11. RESULTS STYLES
   ============================================================================ */

.results-container {
  max-width: 600px;
  margin: 0 auto;
}

.score-display {
  background-color: var(--primary-blue);
  color: var(--white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-3xl) var(--spacing-xl);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

.score-value {
  font-size: 4rem;
  font-weight: 700;
  margin: var(--spacing-md) 0;
}

.score-label {
  font-size: var(--font-size-lg);
  opacity: 0.95;
}

.score-message {
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-lg);
  font-weight: 500;
}

.answer-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.answer-card.correct {
  border-left: 4px solid var(--success-green);
}

.answer-card.incorrect {
  border-left: 4px solid var(--error-red);
}

.answer-question {
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: var(--dark-text);
}

.answer-row {
  display: flex;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.answer-row strong {
  min-width: 100px;
  color: var(--dark-text);
}

.answer-your-answer {
  color: var(--dark-text);
}

.answer-your-answer.correct {
  color: var(--success-green);
  font-weight: 500;
}

.answer-your-answer.incorrect {
  color: var(--error-red);
  font-weight: 500;
}

.answer-correct-answer {
  color: var(--success-green);
  font-weight: 500;
}

.answer-icon {
  margin-right: var(--spacing-md);
  font-size: 1.25rem;
}

.answer-icon.correct {
  color: var(--success-green);
}

.answer-icon.incorrect {
  color: var(--error-red);
}

/* ============================================================================
   12. TABLES
   ============================================================================ */

.table-responsive {
  overflow-x: auto;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--white);
}

thead {
  background-color: var(--primary-blue);
  color: var(--white);
}

th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  border: 1px solid var(--medium-gray);
}

td {
  padding: var(--spacing-md);
  border: 1px solid var(--medium-gray);
}

tbody tr:nth-child(odd) {
  background-color: var(--light-gray);
}

tbody tr:hover {
  background-color: rgba(0, 119, 179, 0.05);
}

/* ============================================================================
   13. FLASH MESSAGES / ALERTS
   ============================================================================ */

.alert {
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border-color: var(--success-green);
}

.alert-error {
  background-color: #f8d7da;
  color: #721c24;
  border-color: var(--error-red);
}

.alert-warning {
  background-color: #fff3cd;
  color: #856404;
  border-color: var(--warning-orange);
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
  border-color: var(--secondary-blue);
}

.alert-icon {
  flex-shrink: 0;
  font-size: 1.25rem;
  margin-top: 2px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.alert-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.alert-close:hover {
  opacity: 1;
}

/* ============================================================================
   14. FOOTER
   ============================================================================ */

footer {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: auto;
}

footer a {
  color: var(--gold-accent);
}

footer a:hover {
  color: var(--white);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
}

/* ============================================================================
   15. BREADCRUMB NAVIGATION
   ============================================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item.active {
  color: var(--dark-text);
}

.breadcrumb-item a {
  color: var(--secondary-blue);
}

.breadcrumb-separator {
  color: var(--medium-gray);
}

/* ============================================================================
   16. PROGRESS INDICATORS
   ============================================================================ */

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--medium-gray);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--primary-blue);
  transition: width var(--transition-slow);
  border-radius: 4px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.progress-percent {
  color: var(--secondary-blue);
  font-weight: 600;
}

/* Course Progress Card */
.progress-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.progress-card-title {
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.progress-steps {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.step {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--light-gray);
  border-radius: var(--border-radius-sm);
}

.step-number {
  width: 24px;
  height: 24px;
  background-color: var(--secondary-blue);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.step.completed .step-number {
  background-color: var(--success-green);
}

.step.active .step-number {
  background-color: var(--gold-accent);
  color: var(--primary-blue);
}

/* ============================================================================
   17. AUTH PAGES
   ============================================================================ */

.auth-container {
  max-width: 420px;
  margin: 3rem auto;
  background-color: var(--white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
}

.auth-card {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  max-width: 450px;
  width: 100%;
  box-shadow: var(--shadow-xl);
}

.auth-card-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.auth-card-header h1 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

.auth-card-header p {
  color: #666;
  margin-bottom: 0;
}

.auth-divider {
  text-align: center;
  margin: var(--spacing-xl) 0;
  color: #999;
  position: relative;
}

.auth-divider::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  background-color: var(--medium-gray);
}

.auth-divider span {
  position: relative;
  background-color: var(--white);
  padding: 0 var(--spacing-md);
}

.auth-link {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.auth-link a {
  color: var(--secondary-blue);
  font-weight: 500;
}

/* ============================================================================
   18. SECTION CONTENT
   ============================================================================ */

.content-section {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
}

.content-section h2,
.content-section h3 {
  color: var(--primary-blue);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.content-section h2:first-child,
.content-section h3:first-child {
  margin-top: 0;
}

.content-section p {
  line-height: 1.8;
  color: var(--dark-text);
}

.content-section ul,
.content-section ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.content-section li {
  margin-bottom: var(--spacing-sm);
}

.content-section blockquote {
  border-left: 4px solid var(--gold-accent);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  color: #666;
  font-style: italic;
}

/* ============================================================================
   19. ADMIN DASHBOARD
   ============================================================================ */

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.stat-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border-top: 4px solid var(--primary-blue);
  transition: all var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-card.success {
  border-top-color: var(--success-green);
}

.stat-card.warning {
  border-top-color: var(--warning-orange);
}

.stat-card.danger {
  border-top-color: var(--error-red);
}

.stat-label {
  color: #999;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-blue);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-change {
  font-size: var(--font-size-sm);
  color: #999;
}

.stat-change.positive {
  color: var(--success-green);
}

.stat-change.negative {
  color: var(--error-red);
}

/* ============================================================================
   20. RESPONSIVE DESIGN
   ============================================================================ */

/* Tablet (768px and down) */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  main {
    padding: var(--spacing-2xl) 0;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--primary-blue);
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    z-index: calc(var(--z-dropdown) - 1);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-hamburger {
    display: flex;
  }

  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }

  .dashboard-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-container {
    max-width: 100%;
    padding: var(--spacing-xl);
  }

  .results-container {
    padding: 0 var(--spacing-md);
  }

  .quiz-container {
    padding: 0 var(--spacing-md);
  }
}

/* Mobile (480px and down) */
@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.1rem;
  }

  .nav-container {
    padding: 0 var(--spacing-md);
  }

  .nav-brand {
    font-size: 1.25rem;
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }

  .grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .dashboard-stats {
    grid-template-columns: 1fr;
  }

  .score-value {
    font-size: 3rem;
  }

  .form-container {
    max-width: 100%;
    padding: var(--spacing-lg);
  }

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

  .btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  table {
    font-size: var(--font-size-sm);
  }

  th,
  td {
    padding: var(--spacing-sm);
  }

  .content-section {
    padding: var(--spacing-lg);
  }

  .auth-card {
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
  }
}

/* ============================================================================
   21. RESPONSIVE IMAGES & TOUCH TARGETS
   ============================================================================ */

img {
  max-width: 100%;
  height: auto;
}

/* Ensure minimum touch target sizes on mobile */
@media (max-width: 768px) {
  a, button, input[type="submit"], .btn, .btn-small {
    min-height: 44px;
  }

  input[type="radio"],
  input[type="checkbox"] {
    width: 20px;
    height: 20px;
    min-width: 20px;
  }
}

/* ============================================================================
   22. UTILITY CLASSES
   ============================================================================ */

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-left {
  text-align: left;
}

.text-muted {
  color: #999;
}

.text-success {
  color: var(--success-green);
}

.text-error {
  color: var(--error-red);
}

.text-warning {
  color: var(--warning-orange);
}

.text-info {
  color: var(--secondary-blue);
}

.text-primary {
  color: var(--primary-blue);
}

.bg-light {
  background-color: var(--light-gray);
}

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

.bg-primary {
  background-color: var(--primary-blue);
}

.bg-secondary {
  background-color: var(--secondary-blue);
}

.mt-0 {
  margin-top: 0;
}

.mt-xs {
  margin-top: var(--spacing-xs);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mt-2xl {
  margin-top: var(--spacing-2xl);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-xs {
  margin-bottom: var(--spacing-xs);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mb-2xl {
  margin-bottom: var(--spacing-2xl);
}

.p-0 {
  padding: 0;
}

.p-sm {
  padding: var(--spacing-sm);
}

.p-md {
  padding: var(--spacing-md);
}

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

.p-xl {
  padding: var(--spacing-xl);
}

.p-2xl {
  padding: var(--spacing-2xl);
}

.d-none {
  display: none;
}

.d-block {
  display: block;
}

.d-inline {
  display: inline;
}

.d-inline-block {
  display: inline-block;
}

.d-flex {
  display: flex;
}

.d-grid {
  display: grid;
}

.flex-column {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.align-center {
  align-items: center;
}

.align-start {
  align-items: flex-start;
}

.align-end {
  align-items: flex-end;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.gap-xl {
  gap: var(--spacing-xl);
}

.w-100 {
  width: 100%;
}

.h-100 {
  height: 100%;
}

.max-w-sm {
  max-width: 400px;
}

.max-w-md {
  max-width: 600px;
}

.max-w-lg {
  max-width: 800px;
}

.max-w-xl {
  max-width: 1200px;
}

.rounded {
  border-radius: var(--border-radius-md);
}

.rounded-sm {
  border-radius: var(--border-radius-sm);
}

.rounded-lg {
  border-radius: var(--border-radius-lg);
}

.shadow {
  box-shadow: var(--shadow-md);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.shadow-xl {
  box-shadow: var(--shadow-xl);
}

.cursor-pointer {
  cursor: pointer;
}

.cursor-disabled {
  cursor: not-allowed;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

/* ============================================================================
   22. PRINT STYLES
   ============================================================================ */

@media print {
  body {
    background-color: var(--white);
  }

  nav,
  footer,
  .nav-hamburger,
  .btn-outline,
  .alert-close {
    display: none;
  }

  .card,
  .content-section {
    box-shadow: none;
    border: 1px solid var(--medium-gray);
  }

  a {
    color: var(--primary-blue);
  }

  .btn-primary,
  .btn-secondary {
    border: 1px solid #000;
    color: #000 !important;
    background-color: transparent !important;
  }
}