/* Root Variables */
:root {
  /* Color Palette */
  --color-primary: #E4C1F9;
  --color-secondary: #F6DFEB;
  --color-success: #D0F4DE;
  --color-warning: #FCF6BD;
  --color-danger: #FFB7C5;
  
  /* Extended Colors */
  --color-primary-dark: #d4a5f4;
  --color-secondary-dark: #f0c8de;
  --color-success-dark: #b8e6c1;
  --color-warning-dark: #f7eca0;
  --color-danger-dark: #ff9bb0;
  
  /* Neutral Colors */
  --color-light: #ffffff;
  --color-dark: #212529;
  --color-gray: #6c757d;
  --color-gray-light: #f8f9fa;
  --color-gray-dark: #495057;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark Mode Variables */
[data-bs-theme="dark"] {
  --color-light: #212529;
  --color-dark: #ffffff;
  --color-gray-light: #343a40;
  --color-gray-dark: #adb5bd;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--color-dark);
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  min-height: 100vh;
  transition: all var(--transition-normal);
}

/* Dark Mode Body */
[data-bs-theme="dark"] body {
  background: linear-gradient(135deg, #2d1b3d 0%, #1a1a2e 100%);
  color: var(--color-light);
}

/* Progress Bar Styles */
.progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
}

.progress-bar {
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

/* Navigation Styles */
.navbar {
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95) !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

[data-bs-theme="dark"] .navbar {
  background: rgba(33, 37, 41, 0.95) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
  color: var(--color-primary-dark) !important;
  font-size: 1.5rem;
}

/* Card Styles */
.welcome-card,
.quiz-card,
.results-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
}

[data-bs-theme="dark"] .welcome-card,
[data-bs-theme="dark"] .quiz-card,
[data-bs-theme="dark"] .results-card {
  background: rgba(33, 37, 41, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.welcome-card:hover,
.quiz-card:hover,
.results-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* Welcome Section */
.welcome-icon {
  color: var(--color-primary);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.quiz-themes .btn {
  border-width: 2px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.quiz-themes .btn:hover {
  transform: translateX(5px);
}

.quiz-themes .btn-check:checked + .btn {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

/* Quiz Section */
.quiz-header {
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-md);
}

#question-text {
  color: var(--color-dark);
  font-weight: 600;
  line-height: 1.4;
}

[data-bs-theme="dark"] #question-text {
  color: var(--color-light);
}

/* Answer Buttons */
.answer-btn {
  padding: var(--spacing-lg);
  border: 2px solid var(--color-gray-light);
  background: var(--color-light);
  color: var(--color-dark);
  text-align: left;
  font-weight: 500;
  transition: all var(--transition-fast);
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
}

.answer-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left var(--transition-slow);
}

.answer-btn:hover::before {
  left: 100%;
}

.answer-btn:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.answer-btn.selected {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-dark);
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

[data-bs-theme="dark"] .answer-btn {
  background: var(--color-gray-light);
  border-color: var(--color-gray);
  color: var(--color-light);
}

[data-bs-theme="dark"] .answer-btn.selected {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* Results Section */
.result-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-success));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  box-shadow: var(--shadow-lg);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.detail-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: all var(--transition-normal);
}

[data-bs-theme="dark"] .detail-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

/* Button Styles */
.btn {
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-normal), height var(--transition-normal);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border: none;
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success), var(--color-success-dark));
  border: none;
}

.btn-warning {
  background: linear-gradient(135deg, var(--color-warning), var(--color-warning-dark));
  border: none;
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), var(--color-danger-dark));
  border: none;
}

/* Animation Classes */
.fade-in {
  animation: fadeIn var(--transition-slow) ease-in;
}

.slide-in-left {
  animation: slideInLeft var(--transition-slow) ease-out;
}

.slide-in-right {
  animation: slideInRight var(--transition-slow) ease-out;
}

.bounce-in {
  animation: bounceIn var(--transition-slow) ease-out;
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Modal and Offcanvas Styles */
.modal-content,
.offcanvas {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-bs-theme="dark"] .modal-content,
[data-bs-theme="dark"] .offcanvas {
  background: rgba(33, 37, 41, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.accordion-button {
  background: rgba(255, 255, 255, 0.8);
  border: none;
}

[data-bs-theme="dark"] .accordion-button {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-light);
}

.accordion-button:not(.collapsed) {
  background: var(--color-primary);
  color: var(--color-dark);
}

/* Profile Preview */
.profile-preview {
  background: rgba(255, 255, 255, 0.8);
  transition: all var(--transition-fast);
}

[data-bs-theme="dark"] .profile-preview {
  background: rgba(255, 255, 255, 0.1);
}

.profile-preview:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

/* Ad Container */
.ad-container {
  max-width: 728px;
  margin: 0 auto;
}

.ad-placeholder {
  border: 2px dashed var(--color-gray);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Footer */
footer {
  background: rgba(255, 255, 255, 0.9) !important;
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

[data-bs-theme="dark"] footer {
  background: rgba(33, 37, 41, 0.9) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .welcome-card,
  .quiz-card,
  .results-card {
    margin: var(--spacing-md);
    padding: var(--spacing-lg) !important;
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .display-5 {
    font-size: 1.75rem;
  }
  
  .quiz-themes .btn-group-vertical {
    gap: var(--spacing-sm);
  }
  
  .answer-btn {
    padding: var(--spacing-md);
    font-size: 0.9rem;
  }
  
  .result-avatar {
    width: 80px;
    height: 80px;
    font-size: 2rem;
  }
  
  .navbar-brand {
    font-size: 1.25rem;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .welcome-card,
  .quiz-card,
  .results-card {
    margin: var(--spacing-sm);
    padding: var(--spacing-md) !important;
  }
  
  .btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
  }
  
  .quiz-footer .d-flex {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .result-actions .d-grid {
    gap: var(--spacing-sm);
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #8000ff;
    --color-secondary: #ff1493;
    --color-success: #008000;
    --color-warning: #ffa500;
    --color-danger: #ff0000;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .progress-container,
  footer,
  .ad-container,
  .btn {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .welcome-card,
  .quiz-card,
  .results-card {
    background: white !important;
    box-shadow: none !important;
    border: 1px solid black !important;
  }
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-primary);
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Focus Styles for Accessibility */
.btn:focus,
.answer-btn:focus,
input[type="radio"]:focus + label {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-light);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* Utility Classes */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-success));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bg-gradient-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.bg-gradient-success {
  background: linear-gradient(135deg, var(--color-success), var(--color-success-dark));
}

.bg-gradient-warning {
  background: linear-gradient(135deg, var(--color-warning), var(--color-warning-dark));
}

.bg-gradient-danger {
  background: linear-gradient(135deg, var(--color-danger), var(--color-danger-dark));
}