@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Dark Theme Palette (Default) */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-input: #1e293b;
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1; /* Indigo */
  --accent-secondary: #8b5cf6; /* Violet */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --accent-glow: rgba(99, 102, 241, 0.15);
  
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  
  --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.8);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme overrides */
body.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(241, 245, 249, 0.9);
  --bg-input: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-glow: rgba(79, 70, 229, 0.1);
  
  --color-success-bg: rgba(16, 185, 129, 0.15);
  --color-error-bg: rgba(239, 68, 68, 0.15);
  --color-warning-bg: rgba(245, 158, 11, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Background blur decorations */
.bg-glow-1 {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(0,0,0,0) 70%);
  z-index: -1;
  pointer-events: none;
}
.bg-glow-2 {
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, rgba(0,0,0,0) 70%);
  z-index: -1;
  pointer-events: none;
}

/* Header styling */
header {
  background-color: rgba(9, 13, 22, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-normal);
}

body.light-theme header {
  background-color: rgba(255, 255, 255, 0.8);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  background: var(--accent-gradient);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.logo-title h1 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-title span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: block;
  margin-top: -2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Base button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

.btn-success {
  background-color: var(--color-success);
  color: white;
}
.btn-success:hover {
  background-color: #0d9668;
}

.btn-danger {
  background-color: var(--color-error);
  color: white;
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background-color: var(--border-color);
  transform: scale(1.05);
}

/* Layout container */
main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  position: relative;
}

/* Screen Management */
.screen {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.screen.active {
  display: block;
}

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

/* Glassmorphism Card System */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.2);
}

/* Dashboard Grid Layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

.welcome-box {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%), var(--bg-card);
  border-color: rgba(99, 102, 241, 0.25);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.welcome-box h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* KPI cards styling */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.kpi-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}

.kpi-val {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
}

.kpi-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Mode selector panel */
.mode-selector {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mode-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-card:hover {
  background: rgba(99, 102, 241, 0.08);
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.mode-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mode-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.mode-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Progress Section */
.subjects-progress {
  max-height: 380px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.subject-progress-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.subject-progress-row:last-child {
  margin-bottom: 0;
}

.subject-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 500;
}

.subject-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 75%;
}

.subject-pct {
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
}

.progress-bar-bg {
  background-color: var(--border-color);
  height: 6px;
  width: 100%;
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  background: var(--accent-gradient);
  height: 100%;
  width: 0%;
  border-radius: 3px;
  transition: width 0.8s ease-out;
}

/* Custom Scrollbar for Subjects list */
.subjects-progress::-webkit-scrollbar {
  width: 6px;
}
.subjects-progress::-webkit-scrollbar-track {
  background: transparent;
}
.subjects-progress::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}
.subjects-progress::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Statistics chart */
.stats-chart-placeholder {
  height: 150px;
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding-top: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.chart-bar-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
  gap: 0.25rem;
}

.chart-bar {
  background: var(--accent-gradient);
  width: 100%;
  max-width: 32px;
  border-radius: 4px 4px 0 0;
  transition: height 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  position: relative;
}

.chart-bar:hover {
  opacity: 0.8;
}

.chart-bar::after {
  content: attr(data-score);
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-family: 'JetBrains Mono', monospace;
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
  white-space: nowrap;
}

.chart-bar:hover::after {
  opacity: 1;
}

.chart-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  text-align: center;
  overflow: hidden;
  max-width: 40px;
  white-space: nowrap;
}

/* Active Quiz Simulator Area */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.quiz-title-area h2 {
  font-size: 1.3rem;
  font-weight: 800;
}

.quiz-meta-info {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.timer-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
}

.timer-warning {
  color: var(--color-error);
  border-color: rgba(239, 68, 68, 0.3);
  background-color: var(--color-error-bg);
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.8; }
  to { opacity: 1; box-shadow: 0 0 10px rgba(239, 68, 68, 0.2); }
}

.progress-counter {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
}

/* Quiz layout (Left: Question, Right: Nav Map) */
.quiz-body {
  display: grid;
  grid-template-columns: 2.5fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .quiz-body {
    grid-template-columns: 1fr;
  }
}

.subject-badge {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  background-color: var(--accent-glow);
  color: var(--accent-primary);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.question-text {
  font-size: 1.15rem;
  line-height: 1.6;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.option-item {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
  font-size: 0.95rem;
  line-height: 1.4;
}

.option-item:hover {
  background-color: rgba(99, 102, 241, 0.03);
  border-color: rgba(99, 102, 241, 0.4);
}

.option-badge {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background-color: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.option-item.selected {
  border-color: var(--accent-primary);
  background-color: var(--accent-glow);
}

.option-item.selected .option-badge {
  background: var(--accent-gradient);
  color: white;
}

/* Feedback in study training mode */
.option-item.correct {
  border-color: var(--color-success);
  background-color: var(--color-success-bg);
}

.option-item.correct .option-badge {
  background-color: var(--color-success);
  color: white;
}

.option-item.incorrect {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.option-item.incorrect .option-badge {
  background-color: var(--color-error);
  color: white;
}

/* Explanation Block */
.explanation-box {
  background-color: var(--color-warning-bg);
  border-left: 4px solid var(--color-warning);
  padding: 1rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 1rem;
  animation: slideDown var(--transition-normal);
}

.explanation-box h4 {
  color: var(--color-warning);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}

.explanation-box p {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Question Navigation Map */
.nav-map-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-map-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  max-height: 250px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.nav-node {
  height: 36px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.nav-node:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.nav-node.active {
  box-shadow: 0 0 8px var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-glow);
}

.nav-node.answered {
  background-color: var(--border-color);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.nav-node.flagged {
  border-color: var(--color-warning);
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

/* Bottom Actions Row */
.quiz-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.action-left, .action-right {
  display: flex;
  gap: 1rem;
}

/* Flag / Marker Button */
.btn-flag {
  background-color: transparent;
  color: var(--color-warning);
  border-color: rgba(245, 158, 11, 0.4);
}
.btn-flag:hover {
  background-color: var(--color-warning-bg);
}
.btn-flag.active {
  background-color: var(--color-warning);
  color: white;
}

/* Custom Checkbox for Materie selection */
.subject-selector-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.subject-checkbox-card {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.subject-checkbox-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
}

.subject-checkbox-card.selected {
  border-color: var(--accent-primary);
  background-color: var(--accent-glow);
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.subject-checkbox-card.selected .custom-checkbox {
  border-color: var(--accent-primary);
  background-color: var(--accent-primary);
}

.subject-checkbox-card.selected .custom-checkbox::after {
  content: "✓";
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
}

.checkbox-label {
  font-size: 0.85rem;
  font-weight: 600;
  user-select: none;
}

/* Results screen styling */
.results-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.results-score-circle {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
  margin-bottom: 1rem;
}

.results-score-num {
  font-size: 3rem;
  font-weight: 800;
  color: white;
  line-height: 1;
}

.results-score-max {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 600;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  margin-top: 0.25rem;
  padding-top: 0.25rem;
  width: 50%;
}

.results-badge {
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
}

.results-badge.pass {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.results-badge.fail {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.results-details {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.results-stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.results-stat-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 700;
}

.results-stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Review Answers container */
.review-questions-list {
  margin-top: 2rem;
  width: 100%;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.review-question-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  background-color: rgba(255, 255, 255, 0.01);
}

.review-question-card.correct {
  border-left: 4px solid var(--color-success);
}

.review-question-card.incorrect {
  border-left: 4px solid var(--color-error);
}

.review-question-card.skipped {
  border-left: 4px solid var(--text-muted);
}

.review-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
}

.review-badge-status {
  font-weight: 700;
}

.review-badge-status.correct { color: var(--color-success); }
.review-badge-status.incorrect { color: var(--color-error); }
.review-badge-status.skipped { color: var(--text-muted); }

/* Database/Editor Screen */
.db-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.search-filters {
  display: flex;
  gap: 0.75rem;
  width: 100%;
  max-width: 600px;
}

.input-text {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.9rem;
}

.input-text:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.select-filter {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.9rem;
}

.select-filter:focus {
  border-color: var(--accent-primary);
}

/* Question management list */
.questions-manager-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
  max-height: 500px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.manager-question-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.manager-question-content {
  flex: 1;
}

.manager-actions {
  display: flex;
  gap: 0.5rem;
}

/* Modal Overlay & Card for Add/Edit Form */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  width: 100%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.form-group textarea {
  min-height: 80px;
  resize: vertical;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.9rem;
}

.form-group textarea:focus {
  border-color: var(--accent-primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.options-inputs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.option-radio {
  cursor: pointer;
}

/* Footer info */
footer {
  margin-top: auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  background-color: rgba(9, 13, 22, 0.2);
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent-gradient);
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  font-size: 0.85rem;
  z-index: 10000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

#header-user-badge {
  font-size: 0.75rem;
  color: var(--accent-primary);
  background-color: var(--accent-glow);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: inline-block;
  margin-top: 2px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

#btn-logout {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Admin Table Styles */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.admin-table th, 
.admin-table td {
  padding: 0.8rem 1.2rem;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background-color: rgba(255, 255, 255, 0.02);
  font-weight: 700;
  color: var(--text-secondary);
}

.admin-table tr:hover {
  background-color: rgba(255, 255, 255, 0.01);
}

.badge-role {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-role.admin {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-role.user {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.badge-sessions {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.badge-sessions.active {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border-color: rgba(16, 185, 129, 0.2);
}

/* Auth tabs (Accedi / Registrati) styles */
.auth-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 4px;
  margin-bottom: 1.5rem;
}

.auth-tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem;
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast) ease;
}

.auth-tab:hover {
  color: var(--text-color);
  background: rgba(255, 255, 255, 0.02);
}

.auth-tab.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.admin-forms-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.admin-tab-btn {
  border: 1px solid var(--border-color) !important;
  background: rgba(255, 255, 255, 0.03) !important;
  transition: all var(--transition-fast) ease !important;
  font-size: 0.85rem !important;
}

.admin-tab-btn:hover {
  background: rgba(255, 255, 255, 0.06) !important;
}

.admin-tab-btn.active {
  background: rgba(99, 102, 241, 0.15) !important;
  border-color: var(--accent-primary) !important;
  color: var(--accent-primary) !important;
  font-weight: 700 !important;
}

/* --- Study Advisor Tips --- */
.advisor-card {
  border-top: 3px solid var(--accent-primary);
}

.advisor-tip {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border-left: 4px solid;
  margin-bottom: 0.6rem;
  background: rgba(255, 255, 255, 0.02);
  align-items: flex-start;
}

.advisor-tip:last-child {
  margin-bottom: 0;
}

.tip-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.tip-content strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.tip-content p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.tip-danger {
  border-left-color: var(--color-error);
  background: rgba(239, 68, 68, 0.06);
}

.tip-danger strong {
  color: var(--color-error);
}

.tip-warning {
  border-left-color: #f59e0b;
  background: rgba(245, 158, 11, 0.06);
}

.tip-warning strong {
  color: #f59e0b;
}

.tip-info {
  border-left-color: #3b82f6;
  background: rgba(59, 130, 246, 0.06);
}

.tip-info strong {
  color: #3b82f6;
}

.tip-success {
  border-left-color: var(--color-success);
  background: rgba(34, 197, 94, 0.06);
}

.tip-success strong {
  color: var(--color-success);
}

/* ===================================================================
   COMPREHENSIVE MOBILE RESPONSIVE DESIGN (Max-width: 768px & 480px)
   =================================================================== */

@media (max-width: 768px) {
  /* Admin forms stack vertically */
  .admin-forms-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  /* Header mobile adjustment */
  header {
    padding: 0.75rem 1rem !important;
    flex-direction: column !important;
    gap: 0.75rem !important;
    align-items: stretch !important;
    text-align: center;
  }
  
  .logo-container {
    justify-content: center !important;
  }
  
  .logo-title h1 {
    font-size: 1.1rem !important;
  }
  
  .nav-actions {
    justify-content: space-around !important;
    width: 100% !important;
    gap: 0.5rem !important;
  }
  
  .nav-actions .btn {
    padding: 0.5rem 0.75rem !important;
    font-size: 0.8rem !important;
    flex: 1 !important;
    justify-content: center !important;
  }

  /* Dashboard improvements */
  .dashboard-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }
  
  .welcome-box h2 {
    font-size: 1.4rem !important;
  }

  /* Mode selection cards stack vertically */
  .mode-card {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
    text-align: left !important;
  }
  
  .mode-card .btn {
    width: 100% !important;
    margin-top: 0.5rem;
  }

  /* Quiz actions grid */
  .quiz-actions {
    flex-direction: column-reverse !important;
    gap: 0.75rem !important;
    align-items: stretch !important;
  }
  
  .action-left {
    width: 100% !important;
  }
  
  .action-left .btn {
    width: 100% !important;
  }
  
  .action-right {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 0.5rem !important;
    width: 100% !important;
  }
  
  .action-right .btn {
    width: 100% !important;
    padding: 0.6rem 0.5rem !important;
    font-size: 0.85rem !important;
  }
  
  .action-right #btn-flag-question {
    grid-column: 1 / -1 !important;
  }
  
  .action-right #btn-submit {
    grid-column: 1 / -1 !important;
  }

  /* Manager question item stack */
  .manager-question-card {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
  }
  
  .manager-question-actions {
    flex-direction: row !important;
    justify-content: flex-end !important;
    width: 100% !important;
    margin-top: 0.5rem !important;
    border-top: 1px solid var(--border-color) !important;
    padding-top: 0.75rem !important;
  }
}

@media (max-width: 480px) {
  /* Login and forms mobile optimizations */
  #login-screen {
    padding: 1rem !important;
  }
  
  #login-screen .card {
    padding: 1.25rem !important;
    max-width: 100% !important;
  }
  
  .auth-tabs {
    margin-bottom: 1.25rem !important;
  }
  
  .auth-tab {
    font-size: 0.85rem !important;
    padding: 0.4rem !important;
  }

  /* Modals padding */
  .modal-card {
    padding: 1.25rem !important;
  }

  /* Search filters stack */
  .search-filters {
    flex-direction: column !important;
    width: 100% !important;
  }

  /* Quiz header title stack */
  .quiz-header {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
    text-align: center !important;
  }
  
  .quiz-meta-info {
    justify-content: space-between !important;
    width: 100% !important;
    gap: 0.5rem !important;
  }
  
  .quiz-title-area h2 {
    font-size: 1.1rem !important;
  }

  /* Review screen meta */
  .review-meta {
    flex-direction: column !important;
    gap: 0.25rem !important;
  }
  
  /* Subject list selection */
  .subject-selector-list {
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
  }
  
  .subject-checkbox-card {
    padding: 0.5rem 0.75rem !important;
  }
  
  .checkbox-label {
    font-size: 0.8rem !important;
  }

  /* KPI cards */
  .kpi-row {
    grid-template-columns: 1fr 1fr !important;
    gap: 0.75rem !important;
  }
}