/* ===== CSS Variables for Theming ===== */
:root {
  /* Light Mode Defaults */
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --bg-quaternary: #dee2e6;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-on-accent: #ffffff;
  --accent-primary: #1976d2;
  --accent-secondary: #1e88e5;
  --correct: #2e7d32;
  --incorrect: #c62828;
  --error: #d32f2f;
  --warning: #f57c00;
  --border-color: #ced4da;
  --shadow-color: rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  
  /* Typography */
  --text-base: 1rem;
  --text-sm: 0.9rem;
  --text-lg: 1.2rem;
  --text-xl: 1.5rem;
  
  /* Borders */
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-width: 1px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px var(--shadow-color);
  --shadow-md: 0 4px 8px var(--shadow-color);
  --shadow-lg: 0 8px 16px var(--shadow-color);
  
  /* Z-index */
  --z-spinner: 1000;
  --z-error: 1001;
  --z-modal: 1002;

  /* Correct & Incorrect Answer Styling */
  --correct-light: rgba(46, 125, 50, 0.1);
  --incorrect-light: rgba(198, 40, 40, 0.1);

  /* Theme Tansition */
  --transition-theme: 0.75s ease;
}

/* Dark Mode Overrides */
:root.dark-mode {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #3d3d3d;
  --bg-quaternary: #4d4d4d;
  --text-primary: #e0e0e0;
  --text-secondary: #7f8fa4;
  --border-color: #444444;
  --shadow-color: rgba(0,0,0,0.3);
}

.dark-mode .app-icon {
  filter: brightness(0.9) contrast(1.1);
}


/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  transition: transform var(--transition-fast);
  color: var(--text-primary);
  position: absolute;
  right: 2rem;
  top: 3rem;
  -webkit-tap-highlight-color: transparent;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.theme-toggle:focus-visible {
  outline: none;
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  transition: transform 0.75s ease;
  will-change: transform;
  transform-origin: center;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background: var(--accent-primary); */
  opacity: 0;
  border-radius: 50%;
  transform: scale(0);
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.theme-toggle:active::after {
  opacity: 0.2;
  transform: scale(1);
}

.dark-mode .theme-toggle svg {
  transform: rotate(180deg);
}

/* Add this for smooth theme transitions */
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition: 
    background-color var(--transition-theme),
    color var(--transition-theme),
    border-color var(--transition-theme),
    box-shadow var(--transition-theme);
}

/* ===== Header Styles ===== */
header {
  background: var(--bg-secondary);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column; /* Stack children vertically */
  align-items: center; /* Center children horizontally */
}

.header-branding {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 8px;
  transition: transform 0.3s ease;
}

.app-icon:hover {
  transform: scale(1.1);
}

.app-icon {
position: relative;
overflow: hidden;
}

.app-icon::after {
content: '';
position: absolute;
top: -50%;
left: -50%;
width: 200%;
height: 200%;
background: linear-gradient(
    to bottom right,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0) 100%
);
transform: rotate(30deg);
opacity: 0;
transition: opacity 0.3s ease;
}

.app-icon:hover::after {
opacity: 1;
animation: shine 1.5s ease infinite;
}

@keyframes shine {
0% { transform: rotate(30deg) translate(-30%, -30%); }
100% { transform: rotate(30deg) translate(30%, 30%); }
}

.header-top {
display: flex;
justify-content: space-between;
align-items: center;
}

.header-content {
width: 100%;
display: flex;
flex-direction: column;
align-items: center;
}

.header-info {
  display: flex;
  gap: var(--space-lg);
  font-size: var(--text-lg);
}

.timer-container, .score-container {
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  min-width: 8rem;
  text-align: center;
}

.timer-container {
  background: rgba(0,0,0,0.1);
}

.score-container {
  background: var(--correct);
}

.tagline {
  color: var(--text-secondary);
  font-size: var(--text-base);
  font-weight: normal;
  margin-top: var(--space-xs);
  text-align: center;
  width: 100%;
  font-style: italic;
}

/* ===== Subject Grid Styles ===== */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  padding: var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
  flex-grow: 1;
}

.subject-btn {
  position: relative;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  background: var(--bg-tertiary);
  /* color: white; */
  border: none;
  border-radius: var(--border-radius);
  overflow: hidden;
  cursor: pointer;
  transition: 
    transform var(--transition-fast),
    background-color var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.subject-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.subject-icon {
  width: 64px;
  height: 64px;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.subject-title {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
  margin: 0;
}

/* ===== Quiz Container Styles ===== */
.quiz-container {
  max-width: 800px;
  margin: var(--space-lg) auto;
  padding: 0 var(--space-md);
  position: relative;
  scroll-margin-top: 20px; /* Creates spacing below sticky header */
}

.question-container {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  position: relative;
  box-shadow: var(--shadow-md);
  border: var(--border-width) solid var(--border-color);
}

.question-image {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1rem auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s ease;
}

.question-image:hover {
    transform: scale(1.03);
}

.question-meta {
  display: flex;
  justify-content: flex-start;
  margin-bottom: var(--space-sm);
}

.question-number {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

#question {
  font-size: var(--text-xl);
  line-height: 1.6;
  color: var(--text-primary);
  margin: 0;
}

/* ===== Choices Styles ===== */
.choices-container {
  display: grid;
  gap: var(--space-sm);
}

.choice-btn {
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: var(--text-base);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: var(--border-width) solid var(--border-color);
  opacity: 0;
  transform: translateY(10px);
  animation: fadeIn 0.3s ease-out forwards;
}

.choice-btn:nth-child(1) { animation-delay: 0.1s; }
.choice-btn:nth-child(2) { animation-delay: 0.2s; }
.choice-btn:nth-child(3) { animation-delay: 0.3s; }
.choice-btn:nth-child(4) { animation-delay: 0.4s; }
.choice-btn:nth-child(5) { animation-delay: 0.5s; }

.choice-btn:hover:not(:disabled) {
  /* background: var(--bg-quaternary); */
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.choice-btn:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

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

.choice-btn.correct {
  background: var(--correct) !important;
  color: white !important;
}

.choice-btn.incorrect {
  background: var(--incorrect) !important;
  color: white !important;
}

/* ===== Progress Bar ===== */
.progress-container {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  margin: var(--space-md) 0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent-primary);
  border-radius: 3px;
  transition: width var(--transition-normal);
}

/* ===== NEW SUBMIT & CONTINUE BUTTONS */
.quiz-controls {
  display: flex;
  justify-content: center;
  margin-top: var(--space-xl);
  gap: var(--space-md);
}

.quiz-btn {
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius);
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 200px;
  text-align: center;
}

#submit-btn {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

#submit-btn:not(:disabled) {
  background: var(--accent-primary);
  color: var(--text-on-accent);
}

#submit-btn:not(:disabled):hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#continue-btn {
  background: var(--correct);
  color: var(--text-on-accent);
}

#continue-btn:hover {
  background: var(--correct);
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Disabled state */
#submit-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}
/* ===== END SUBMIT & CONTINUE BUTTONS */

/* ===== Feedback Styles ===== */
.feedback {
  padding: var(--space-md);
  border-radius: var(--border-radius);
  margin-top: var(--space-md);
  animation: fadeIn var(--transition-normal) forwards;
  display: none;
  border-left: 4px solid transparent;
}

.feedback:not(.hidden) {
  display: block;
}

.feedback.correct {
  background: rgba(46, 125, 50, 0.1);
  border-left-color: var(--correct);
}

.feedback.incorrect {
  background: rgba(198, 40, 40, 0.1);
  border-left-color: var(--incorrect);
}

/* #feedback-text {
  margin-bottom: var(--space-sm);
} */

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.question-container, .choices-container {
  animation: fadeIn 0.4s ease-out forwards;
}

/* ===== End Screen Styles ===== */
.end-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.end-screen:not(.hidden) {
  opacity: 1;
  pointer-events: all;
}

.end-content {
  background: var(--bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--border-radius);
  max-width: 600px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: var(--border-width) solid var(--border-color);
  max-height: 90vh;   /* or any height you want */
  overflow-y: auto;
  padding: 1rem;
  scrollbar-width: thin;
  scrollbar-color: #8b8b8b transparent;
}

.results-container {
  margin: var(--space-lg) 0;
}

.results-container p {
  margin: var(--space-sm) 0;
  font-size: var(--text-lg);
}

.end-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.end-btn {
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--border-radius);
  font-weight: bold;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  min-width: 150px;
}

#review-btn {
  background: var(--accent-primary);
  color: white;
}

#new-quiz-btn {
  background: var(--correct);
  color: white;
}

/* ===== REVIEW MODE - MODERN DESIGN ===== */
.review-container {
max-width: 800px;
margin: 0 auto;
padding: 1.5rem;
background: var(--bg-secondary);
border-radius: 12px;
box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ===== Enhanced Review Quiz Styles ===== */
.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.review-stats {
  display: flex;
  gap: 1.5rem;
}

.stat-item {
  text-align: center;
  background: var(--bg-tertiary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  min-width: 80px;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 600;
  display: block;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
  margin-top: 0.25rem;
}

.review-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.review-control-btn {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: none;
  padding: 0.6rem 1rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background-color 0.2s ease;
}

.review-control-btn:hover {
  background: var(--bg-quaternary);
}

.review-control-btn svg {
  width: 16px;
  height: 16px;
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
}

.filter-tab {
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: none;
  transition: all 0.2s ease;
}

.filter-tab.active {
  background: var(--accent-primary);
  color: white;
}

.filter-tab:not(.active):hover {
  background: var(--bg-quaternary);
}

.review-questions-container {
  max-height: 60vh;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.review-item {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  border-left: 4px solid;
}

.review-item.correct {
  border-left-color: var(--correct);
}

.review-item.incorrect {
  border-left-color: var(--incorrect);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.question-number {
  font-weight: 600;
  color: var(--text-primary);
}

.question-status {
  font-size: 0.85rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
}

.question-status.correct {
  background: var(--correct-light);
  color: var(--correct);
}

.question-status.incorrect {
  background: var(--incorrect-light);
  color: var(--incorrect);
}

.review-question {
  font-size: 1.05rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.answer-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.user-answer, .correct-answer {
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
}

.user-answer.correct {
  background: var(--correct-light);
  border: 1px solid rgba(46, 125, 50, 0.2);
}

.user-answer.incorrect {
  background: var(--incorrect-light);
  border: 1px solid rgba(198, 40, 40, 0.2);
}

.correct-answer {
  background: rgba(46, 125, 50, 0.05);
  border: 1px dashed rgba(46, 125, 50, 0.3);
}

.answer-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.25rem;
}

.answer-text {
  color: var(--text-primary);
  line-height: 1.5;
}

.explanation-section {
  background: rgba(25, 118, 210, 0.05);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  border-left: 3px solid var(--accent-primary);
}

.explanation-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.explanation-header svg {
  width: 18px;
  height: 18px;
}

.explanation-text {
  color: var(--text-primary);
  line-height: 1.5;
  margin: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .review-header {
      flex-direction: column;
      align-items: flex-start;
  }
  
  .review-stats {
      width: 100%;
      justify-content: space-between;
  }
  
  .stat-item {
      flex: 1;
  }
  
  .review-controls {
      flex-direction: column-reverse;
      align-items: flex-start;
  }
  
  .filter-tabs {
      width: 100%;
      justify-content: space-between;
  }
  
  .filter-tab {
      flex: 1;
      text-align: center;
  }
  
  .review-questions-container {
      max-height: 50vh;
  }
}

/* Question Cards */
.review-item {
background: var(--bg-secondary);
border-radius: 10px;
padding: 1.5rem;
margin-bottom: 1.5rem;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
border-left: 4px solid transparent;
transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.review-item:hover {
transform: translateY(-2px);
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.review-item.correct {
border-left-color: var(--correct);
background: linear-gradient(to right, rgba(46, 125, 50, 0.03), transparent);
}

.review-item.incorrect {
border-left-color: var(--incorrect);
background: linear-gradient(to right, rgba(198, 40, 40, 0.03), transparent);
}

.review-question {
font-size: 1.2rem;
font-weight: 500;
margin-bottom: 1rem;
color: var(--text-primary);
line-height: 1.5;
}

.review-answer-section {
margin: 1rem 0;
}

.answer-label {
display: inline-block;
padding: 0.25rem 0.75rem;
padding-left: 0;
border-radius: 4px;
font-size: 0.85rem;
font-weight: 600;
margin-bottom: 0.5rem;
}

.answer-label.your-answer {
background: var(--incorrect-light);
color: var(--incorrect);
}

.answer-label.correct-answer {
background: var(--correct-light);
color: var(--correct);
}

.review-answer {
padding: 0.75rem;
border-radius: 6px;
margin-bottom: 0.5rem;
background: var(--bg-tertiary);
}

.review-explanation {
background: rgba(25, 118, 210, 0.08);
padding: 1rem;
border-radius: 6px;
margin-top: 1rem;
border-left: 3px solid var(--accent-primary);
}

.review-explanation-title {
font-weight: 600;
color: var(--accent-primary);
margin-bottom: 0.5rem;
}

/* Navigation & Actions */
.review-actions {
display: flex;
justify-content: space-between;
margin-top: 2rem;
flex-wrap: wrap;
gap: 1rem;
}

.review-nav-buttons {
display: flex;
gap: 0.75rem;
}

.review-main-actions {
display: flex;
gap: 0.75rem;
}

/* Filter Tabs */
.filter-tabs {
display: flex;
gap: 0.5rem;
margin-bottom: 1.5rem;
border-bottom: 1px solid var(--border-color);
padding-bottom: 0.75rem;
}

.filter-tab {
padding: 0.5rem 1rem;
border-radius: 6px 6px 0 0;
cursor: pointer;
font-weight: 500;
transition: all 0.2s ease;
border: 1px solid transparent;
border-bottom: none;
}

.filter-tab.active {
background: var(--accent-primary);
color: white;
}

.filter-tab:not(.active):hover {
background: var(--bg-tertiary);
}

/* ===== Loading Spinner ===== */
.loading-spinner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: var(--z-spinner);
  transition: opacity var(--transition-normal);
}

.loading-spinner.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s linear infinite;
}

.loading-text {
  color: white;
  margin-top: var(--space-md);
  font-size: var(--text-lg);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Error Message ===== */
.error-message {
  position: fixed;
  top: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-md);
  background: var(--error);
  color: white;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-error);
  max-width: 90%;
  text-align: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: flex;
  align-items: center;
}

.error-message:not(.hidden) {
  opacity: 1;
}

.error-message::before {
  content: "⚠️";
  margin-right: var(--space-xs);
}

/* ===== Footer Styles ===== */
footer {
  background: var(--bg-secondary);
  padding: var(--space-lg) var(--space-sm);
  margin-top: auto;
  border-top: var(--border-width) solid var(--bg-tertiary);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

footer p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

footer nav ul {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

footer nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

footer nav a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* ===== Modal Styles ===== */
/* ===== Enhanced Modal Styles ===== */
.modal {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: rgba(0, 0, 0, 0.8);
display: flex;
justify-content: center;
align-items: center;
z-index: var(--z-modal);
opacity: 0;
pointer-events: none;
transition: opacity var(--transition-normal);
padding: var(--space-md);
box-sizing: border-box;
}

.modal.active {
opacity: 1;
pointer-events: all;
}

.modal-content {
background: var(--bg-secondary);
border-radius: var(--border-radius);
width: 100%;
max-width: 600px;
max-height: 90vh;
overflow-y: auto;
box-shadow: var(--shadow-lg);
transform: translateY(20px);
transition: transform var(--transition-normal);
position: relative;
scrollbar-width: thin;
scrollbar-color: #8b8b8b transparent;
}

.modal.active .modal-content {
transform: translateY(0);
}

.close-modal {
position: absolute;
top: var(--space-sm);
right: var(--space-sm);
background: none;
border: none;
font-size: var(--text-xl);
color: var(--text-secondary);
cursor: pointer;
padding: var(--space-xs);
line-height: 1;
z-index: 2;
border: none;
}

.close-modal:focus-visible {
  outline: none;
} 

/* .close-modal:hover {
color: var(--accent-primary);
} */

.modal-header {
padding: var(--space-sm);
padding-bottom: 0;
position: sticky;
top: 0;
background: var(--bg-secondary);
z-index: 1;
display: flex;
justify-content: space-between;
align-items: center;
padding-bottom: 1rem;
border-bottom: 1px solid var(--border-color);
/* margin-bottom: 1.5rem; */
}

.modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.modal-header .close-modal {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.modal-header .close-modal:hover {
  color: var(--text-primary);
}

.modal-header .close-modal svg {
  width: 1.5rem;
  height: 1.5rem;
  display: block;
}

.modal-body {
padding: var(--space-lg);
padding-top: var(--space-md);
}

.modal-footer {
padding: var(--space-md) var(--space-lg);
background: var(--bg-tertiary);
border-bottom-left-radius: var(--border-radius);
border-bottom-right-radius: var(--border-radius);
}

/* ===== Professional Form Styles ===== */
.modal-form {
display: grid;
gap: var(--space-md);
}

.modal-form label {
display: block;
margin-bottom: none;
font-weight: 500;
color: var(--text-primary);
}

.modal-form input,
.modal-form textarea {
width: 100%;
padding: var(--space-sm);
border: 1px solid var(--bg-quaternary);
border-radius: var(--border-radius-sm);
background: var(--bg-primary);
color: var(--text-primary);
font-family: inherit;
font-size: var(--text-base);
transition: border-color var(--transition-fast);
}

.modal-form input:focus,
.modal-form textarea:focus {
outline: none;
border-color: var(--accent-primary);
box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

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

.form-submit-btn {
background: var(--accent-primary);
color: white;
border: none;
padding: var(--space-sm) var(--space-md);
border-radius: var(--border-radius-sm);
font-weight: 500;
cursor: pointer;
transition: background-color var(--transition-fast);
margin-top: var(--space-xs);
}

.form-submit-btn:hover {
background: var(--accent-secondary);
} 

.retry-btn {
background: var(--accent-primary);
color: white;
border: none;
padding: var(--space-xs) var(--space-sm);
border-radius: var(--border-radius-sm);
margin-top: var(--space-sm);
cursor: pointer;
transition: background-color var(--transition-fast);
}

.retry-btn:hover {
background: var(--accent-secondary);
}

.section-1, .section-2 {
  margin-bottom: var(--space-md);
}

.feature-item {
  margin-top: 1.5rem;
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 992px) {
  .subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  #feedback-text {
    font-size: var(--text-base);
  }
}

@media (max-width: 768px) {
  :root {
    --text-base: 0.9rem;
    --text-lg: 1.1rem;
  }

  .subject-grid {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }

  .header-info {
    flex-direction: row;
    gap: var(--space-sm);
  }

  .timer-container, .score-container {
    min-width: 130px;
    width: 100%;
  }

  .end-content {
    padding: var(--space-lg);
  }

  .end-buttons {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .modal-content {
    max-height: 85vh;
  }

  .modal-form textarea {
    min-height: 95px;
  }
  
  .modal-header,
  .modal-body {
    padding: var(--space-md);
  }

  .app-icon {
    width: 36px;
    height: 36px;
}
  .header-branding h1 {
    font-size: 1.5rem;
}

.question-container #question{
  font-size: var(--text-lg);
}

#feedback-text {
  font-size: var(--text-base);
}

.theme-toggle{
  top: 2rem;
  right: 1.3rem
}

.review-header {
  flex-direction: column;
  align-items: flex-start;
}

.review-stats {
  width: 100%;
  justify-content: space-between;
}

.stat-item {
  flex: 1;
}

.review-controls {
  flex-direction: column-reverse;
  align-items: flex-start;
}

.filter-tabs {
  width: 100%;
  justify-content: space-between;
}

.filter-tab {
  flex: 1;
  text-align: center;
}
}

@media (max-width: 480px) {
  :root {
    --space-md: 1rem;
    --space-lg: 1.5rem;
  }

  .choice-btn {
    padding: var(--space-sm);
  }

  .loading-text {
    font-size: var(--text-base);
    padding: 0 var(--space-sm);
    text-align: center;
  }

  .subject-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    padding: 1rem;
    max-width: 100%;
}

.subject-btn {
    padding: 0.75rem;
    min-height: 120px;
    border-radius: 0.5rem;
}

.subject-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 0.5rem;
}

.subject-title {
    font-size: 0.85rem;
    line-height: 1.3;
}

.app-icon {
  width: 32px;
  height: 32px;
}

.header-branding {
  gap: 8px;
}

.question-container #question{
  font-size: var(--text-lg);
}

#feedback-text {
  font-size: var(--text-base);
}
.theme-toggle{
  top: 2rem;
  right: 1.3rem
}
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .spinner {
    animation: none;
    border-top-color: var(--text-secondary);
  }

  html {
    scroll-behavior: auto;
}

  .quiz-container {
      scroll-margin-top: 80px; /* Adjust based on your header height */
  }

  .question-container, .choices-container {
    animation: none;
  }

  .theme-toggle svg {
    transition: none;
  }
}