:root {
    /* Palette */
    --bg-color: #f6f7fb;
    --surface-color: #ffffff;
    --text-primary: #1f2328;
    --text-secondary: #6b7280;
    --border-color: #e6e8ef;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --correct-color: #16a34a;
    --incorrect-color: #dc2626;
    --shadow-color: rgba(2, 6, 23, 0.08);

    /* Design tokens */
    --radius: 12px;
    --radius-sm: 8px;
    --space-1: 6px;
    --space-2: 10px;
    --space-3: 14px;
    --space-4: 18px;
    --space-5: 24px;
    --space-6: 32px;
}

body.dark-theme {
    --bg-color: #0b1020;
    --surface-color: #0f172a;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --border-color: #263246;
    --accent-color: #60a5fa;
    --accent-hover: #93c5fd;
    --correct-color: #34d399;
    --incorrect-color: #f87171;
    --shadow-color: rgba(0, 0, 0, 0.45);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(1200px 500px at 10% -10%, rgba(37,99,235,0.08), transparent),
               radial-gradient(1000px 400px at 110% 10%, rgba(99,102,241,0.06), transparent),
               var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--space-6);
    transition: background-color 0.3s, color 0.3s, background 0.3s;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 860px;
    background-color: var(--surface-color);
    border-radius: var(--radius);
    padding: clamp(20px, 3vw, 36px);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 28px var(--shadow-color);
    transition: background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

@media (max-width: 600px) {
    .container {
        border-radius: 0;
        border-left: none;
        border-right: none;
        min-height: 100vh;
    }
}

.screen { display: none; flex-direction: column; gap: 24px; }
.screen.active { display: flex; }

.title { font-size: clamp(1.8rem, 2.5vw, 2.2rem); font-weight: 700; text-align: center; color: var(--text-primary); letter-spacing: -0.02em; }
.subtitle { text-align: center; color: var(--text-secondary); margin-top: -8px; }
.setup-box h2 {
    margin-bottom: var(--space-3); font-weight: 600; font-size: 1.05rem;
    padding-bottom: var(--space-2); border-bottom: 1px solid var(--border-color);
}

.topic-grid { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.topic-item input[type="checkbox"] { display: none; }

.input-number {
    width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
    border: 1px solid var(--border-color); background-color: var(--bg-color);
    color: var(--text-primary); font-size: 1rem; text-align: center;
}

.btn, .btn-secondary, .btn-danger {
    padding: 12px 20px; font-size: 1rem; font-weight: 600;
    border: none; border-radius: var(--radius-sm); cursor: pointer;
    transition: transform 0.06s ease, background-color 0.2s ease, box-shadow 0.2s ease; width: 100%;
}
.btn { background-color: var(--accent-color); color: white; box-shadow: 0 1px 0 rgba(2,6,23,0.08); }
.btn:hover { background-color: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(2,6,23,0.12); }
.btn-secondary { background-color: var(--text-secondary); color: var(--surface-color); margin-top: 10px; }
.btn-danger { background-color: transparent; border: 1px solid var(--incorrect-color); color: var(--incorrect-color); }
.btn-danger:hover { background-color: var(--incorrect-color); color: white; }
#next-question-btn { display: none; }

#progress-container { position: sticky; top: 0; width: 100%; height: 8px; background-color: var(--border-color); border-radius: 6px; overflow: hidden; z-index: 2; }
#progress-bar { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent-color), #7c3aed); border-radius: 6px; transition: width 0.4s ease; }
#quiz-header { position: sticky; top: 8px; display: flex; justify-content: space-between; font-size: 0.95rem; color: var(--text-secondary); padding: var(--space-2) 2px; z-index: 1; backdrop-filter: saturate(1.1); }
#question-text { font-size: clamp(1.2rem, 2.1vw, 1.6rem); font-weight: 600; text-align: center; line-height: 1.6; letter-spacing: -0.01em; }
.answer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-2); }
.answer-btn {
    display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: var(--space-3);
    padding: 14px 16px; background: var(--surface-color); border: 1px solid var(--border-color);
    color: var(--text-primary); border-radius: var(--radius-sm); text-align: left; cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.06s ease, box-shadow 0.15s ease;
}
.answer-btn:hover:not([disabled]) { border-color: var(--accent-color); background-color: color-mix(in srgb, var(--accent-color) 6%, var(--surface-color)); box-shadow: 0 4px 14px var(--shadow-color); transform: translateY(-1px); }
.answer-btn:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent-color) 35%, transparent); outline-offset: 2px; }
.answer-btn.correct {
  border-color: var(--correct-color);
  background-color: color-mix(in srgb, var(--correct-color) 12%, var(--surface-color));
  color: white;
  background-image: linear-gradient(to right, var(--correct-color), color-mix(in srgb, var(--correct-color) 70%, #000));
  animation: correctPulse 0.5s ease;
}

@keyframes correctPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

.answer-btn.incorrect {
  border-color: var(--incorrect-color);
  background-color: color-mix(in srgb, var(--incorrect-color) 14%, var(--surface-color));
  color: white;
  background-image: linear-gradient(to right, var(--incorrect-color), color-mix(in srgb, var(--incorrect-color) 70%, #000));
  animation: incorrectShake 0.5s ease;
}

@keyframes incorrectShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

.answer-btn:disabled { cursor: not-allowed; opacity: 0.9; }
.answer-key { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; background: var(--bg-color); color: var(--text-secondary); font-weight: 700; }
.answer-text { display: block; font-size: 1rem; line-height: 1.5; }

.score-container { text-align: center; }
.score-circle { width: 120px; height: 120px; border-radius: 50%; margin: 16px auto; display: flex; justify-content: center; align-items: center; font-size: 2.2rem; font-weight: 700; border: 6px solid; }
#quiz-status { font-size: 2rem; font-weight: 700; }
#quiz-status.promosso, .promosso .score-circle { color: var(--correct-color); border-color: var(--correct-color); }
#quiz-status.bocciato, .bocciato .score-circle { color: var(--incorrect-color); border-color: var(--incorrect-color); }
.history-container h2 { text-align: center; margin-bottom: 16px; }
#progress-history { max-height: 180px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding: 4px; }
.history-item { display: flex; justify-content: space-between; align-items: center; padding: 10px; background: var(--bg-color); border-radius: 4px; font-size: 0.9rem; }
.history-item .status { font-weight: 700; }
.history-item .status.promosso { color: var(--correct-color); }
.history-item .status.bocciato { color: var(--incorrect-color); }

/* --- CROSS BANNER --- */
.cross-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
  transition: all 0.2s ease;
  border: 2px solid rgba(255, 255, 255, 0.2);
  white-space: nowrap;
}

.cross-banner:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  border-color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
}

.banner-icon {
  font-size: 1rem;
}

.banner-text {
  white-space: nowrap;
  color: white;
}

.banner-text::before {
  content: 'Passa a ';
  color: white;
}

.banner-arrow {
  font-size: 1rem;
  transition: transform 0.3s ease;
}

.cross-banner:hover .banner-arrow {
  transform: translateX(3px);
}

/* --- SWITCHER DARK MODE ACCESSIBILE E FUNZIONANTE --- */
.theme-switcher {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  background: var(--surface-color);
  padding: 6px;
  border-radius: 999px;
  box-shadow: 0 4px 12px var(--shadow-color);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.theme-switcher:hover {
  box-shadow: 0 6px 20px var(--shadow-color);
  transform: scale(1.05);
}

.switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: color-mix(in srgb, var(--text-secondary) 45%, transparent);
  transition: background-color 0.3s;
  border-radius: 24px;
}

.slider::before {
  content: "☀️";
  position: absolute;
  height: 24px;
  width: 24px;
  left: 2px;
  top: 2px;
  background: #f1c40f;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.switch input:checked + .slider {
  background-color: var(--accent-color);
}

.switch input:checked + .slider::before {
  content: "🌙";
  left: 26px;
  background: #f39c12;
}

@media (max-width: 500px) {
  .theme-switcher {
    top: 12px;
    right: 12px;
    padding: 4px;
  }
  
  #review-screen.promosso .review-header::before,
  #review-screen.promosso .review-header::after {
    font-size: 2rem;
  }
}

@media (min-width: 700px) { .answer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) {
    body {
        padding: 0;
    }
}

@media (max-width: 500px) {
    body { padding: 0; }
    .container { padding: var(--space-5); }
    .title { font-size: 1.6rem; }
    #question-text { font-size: 1.1rem; }
}

/* Tabelle e wrapper */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.stats-table th, .stats-table td {
  text-align: left;
  padding: clamp(8px, 2vw, 12px);
  border-bottom: 1px solid var(--border-color);
}

.stats-table thead th {
  background: var(--bg-color);
  font-weight: 600;
  color: var(--text-primary);
  position: sticky;
  top: 0;
  z-index: 1;
}

.stats-table tbody tr {
  transition: background-color 0.2s ease;
}

.stats-table tbody tr:hover {
  background: color-mix(in srgb, var(--accent-color) 6%, var(--surface-color));
}

.stats-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 500px) {
  .stats-table {
    font-size: 0.85rem;
  }
  
  .stats-table th, .stats-table td {
    padding: 8px 6px;
  }
}

/* --- Orali: sezioni extra --- */
.orali-container {
  max-width: 960px;
  animation: fadeIn 0.4s ease;
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-header {
  text-align: center;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--border-color);
}

.orali-summary {
  margin-top: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.btn-container {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  min-width: 200px;
  justify-content: center;
  transition: all 0.2s ease;
}

.btn-icon {
  font-size: 1.2rem;
  transition: transform 0.2s ease;
}

.btn-back:hover .btn-icon {
  transform: translateX(-3px);
}

.top-section, .experiences-section {
  margin-bottom: var(--space-6);
}

.section-header {
  margin-bottom: var(--space-4);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.section-icon {
  font-size: 1.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-left: 40px;
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  text-align: center;
  background: linear-gradient(135deg, var(--accent-color), #7c3aed);
  color: white;
  border-radius: 8px;
  padding: 4px 10px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Classifica con barre */
.ranking-card {
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--border-color);
  background: var(--surface-color);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: box-shadow 0.3s ease;
}

.ranking-card:hover {
  box-shadow: 0 6px 28px var(--shadow-color);
}

.top-list {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vw, 16px);
}

.top-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(12px, 2vw, 16px);
  padding: clamp(8px, 1.5vw, 12px);
  background: var(--bg-color);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.top-item:hover {
  background: color-mix(in srgb, var(--accent-color) 8%, var(--bg-color));
  transform: translateX(4px);
}

.top-label {
  font-weight: 500;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  color: var(--text-primary);
  line-height: 1.4;
}

.top-bar {
  height: 12px;
  background: var(--border-color);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.top-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), #7c3aed);
  border-radius: 999px;
  transition: width 0.5s ease;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.4);
}

.top-count {
  text-align: right;
  color: var(--accent-color);
  font-weight: 700;
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  min-width: 40px;
}

/* Collapsible cards (mobile first) */
.orali-list {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vw, 16px);
}

.collapsible-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--surface-color);
  box-shadow: 0 2px 12px var(--shadow-color);
  transition: all 0.3s ease;
  overflow: hidden;
}

.collapsible-card:hover {
  box-shadow: 0 4px 20px var(--shadow-color);
  border-color: color-mix(in srgb, var(--accent-color) 40%, var(--border-color));
}

.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(14px, 2.5vw, 18px);
  cursor: pointer;
  background: var(--bg-color);
  transition: background-color 0.2s ease;
  gap: 12px;
}

.collapsible-header:hover {
  background: color-mix(in srgb, var(--accent-color) 5%, var(--bg-color));
}

.collapsible-header .title {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  flex: 1;
}

.collapsible-toggle {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.collapsible-header:hover .collapsible-toggle {
  color: var(--accent-color);
}

.count-badge {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: clamp(0.8rem, 1.5vw, 0.9rem);
  white-space: nowrap;
}

.collapsible-body {
  padding: 0 clamp(14px, 2.5vw, 18px) clamp(14px, 2.5vw, 18px);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 2000px;
  }
}

.collapsed .collapsible-body {
  display: none;
}

.collapsed .collapsible-toggle::after {
  content: ' ▼';
}

.collapsible-toggle::after {
  content: ' ▲';
}

/* Loading skeleton */
.loading-skeleton {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skeleton-card {
  height: 120px;
  background: linear-gradient(90deg, var(--bg-color) 25%, var(--border-color) 50%, var(--bg-color) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Noscript message */
.noscript-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--surface-color);
  border: 2px solid var(--incorrect-color);
  border-radius: var(--radius);
  padding: var(--space-5);
  text-align: center;
  box-shadow: 0 8px 32px var(--shadow-color);
  max-width: 400px;
}

.noscript-message strong {
  color: var(--incorrect-color);
  font-size: 1.2rem;
  display: block;
  margin-bottom: var(--space-2);
}

/* Responsive adjustments */
@media (max-width: 700px) {
  .section-subtitle {
    margin-left: 0;
    margin-top: var(--space-1);
  }

  .top-item {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
  }

  .rank-badge {
    min-width: 28px;
    height: 28px;
    font-size: 0.85rem;
  }

  .collapsible-card {
    margin-bottom: 10px;
  }

  .collapsible-card.collapsed .collapsible-body {
    display: none;
  }

  .count-badge {
    display: block;
    width: 100%;
    margin-top: 4px;
    font-size: 0.8rem;
  }

  .collapsible-header {
    flex-wrap: wrap;
  }
}

@media (max-width: 500px) {
  .page-header {
    margin-bottom: var(--space-4);
  }

  .btn-back {
    width: 100%;
    min-width: unset;
  }

  .section-icon {
    font-size: 1.3rem;
  }

  .top-section, .experiences-section {
    margin-bottom: var(--space-5);
  }
}

/* Styling for content inside collapsible cards */
.collapsible-body ul {
  margin: 8px 0 0 24px;
  padding: 0;
  line-height: 1.7;
}

.collapsible-body ul li {
  margin-bottom: 6px;
  color: var(--text-primary);
}

.collapsible-body ul li::marker {
  color: var(--accent-color);
}

.collapsible-body strong {
  color: var(--text-primary);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.collapsible-body > div {
  animation: fadeInContent 0.3s ease;
}

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

/* Detail boxes inside cards */
.collapsible-body > div > div[style*="border"] {
  background: var(--bg-color);
  transition: all 0.2s ease;
}

.collapsible-body > div > div[style*="border"]:hover {
  background: color-mix(in srgb, var(--accent-color) 4%, var(--bg-color));
  border-color: var(--accent-color) !important;
}

@media (min-width: 701px) {
  .collapsible-body {
    display: block !important;
  }

  .collapsible-toggle {
    display: none;
  }

  .collapsible-header {
    cursor: default;
  }
}

@media (max-width: 500px) {
  .collapsible-body ul {
    margin-left: 18px;
  }
}

/* ========================================
   INDEX PAGE - ENHANCED STYLES
   ======================================== */

/* Quiz Header */
.quiz-header {
  text-align: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--border-color);
  animation: fadeIn 0.5s ease;
}

/* Setup Boxes Enhanced */
.setup-box {
  margin-bottom: var(--space-5);
  padding: clamp(20px, 3vw, 28px);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: 0 2px 12px var(--shadow-color);
  transition: all 0.3s ease;
}

.setup-box:hover {
  box-shadow: 0 4px 20px var(--shadow-color);
  border-color: color-mix(in srgb, var(--accent-color) 30%, var(--border-color));
}

.topics-box {
  background: var(--surface-color);
}

/* Setup Header */
.setup-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.setup-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-color), #7c3aed);
  color: white;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1.4rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.setup-title {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.setup-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Topic Grid Enhanced */
.topic-grid {
  margin-bottom: var(--space-4);
  min-height: 100px;
}

.topic-item {
  animation: slideIn 0.3s ease forwards;
  opacity: 0;
}

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

.topic-item:nth-child(1) { animation-delay: 0.05s; }
.topic-item:nth-child(2) { animation-delay: 0.1s; }
.topic-item:nth-child(3) { animation-delay: 0.15s; }
.topic-item:nth-child(4) { animation-delay: 0.2s; }
.topic-item:nth-child(5) { animation-delay: 0.25s; }
.topic-item:nth-child(6) { animation-delay: 0.3s; }
.topic-item:nth-child(7) { animation-delay: 0.35s; }
.topic-item:nth-child(8) { animation-delay: 0.4s; }

.topic-item label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.92rem;
  transition: all 0.25s ease;
  color: var(--text-primary);
  font-weight: 400;
  /* will-change removed to avoid text raster glitches */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.topic-item input[type="checkbox"]:checked + label {
  background: linear-gradient(135deg, var(--accent-color), #7c3aed) !important;
  color: #ffffff !important;
  border-color: var(--accent-color) !important;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  /* Force hardware acceleration on WebKit browsers */
  }

.topic-item input[type="checkbox"]:checked + label span {
  color: #ffffff !important;
  /* Ensure text is always on top */
  }

.topic-item label span {
  display: inline-block;
  position: relative;
  z-index: 1;
}

.topic-item label:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-color);
}

/* Loading skeleton for topics */
.loading-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skeleton-topic {
  width: 140px;
  height: 38px;
  background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-color) 50%, var(--border-color) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 999px;
}

/* Setup Actions */
.setup-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

/* Number Input Enhanced */
.number-input-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  max-width: 300px;
  margin: 0 auto;
}

.number-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.number-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.1);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.number-btn:active {
  transform: scale(0.95);
}

.input-number {
  width: 120px;
  font-size: 2rem;
  font-weight: 700;
  height: 70px;
  box-shadow: 0 2px 8px var(--shadow-color);
  border: 2px solid var(--border-color);
  transition: all 0.2s ease;
}

.input-number:focus {
  border-color: var(--accent-color);
  box-shadow: 0 4px 16px var(--shadow-color);
  outline: none;
}

/* Button Enhancements */
.btn-start,
.btn-retry,
.btn-next {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 1.05rem;
  position: relative;
  overflow: hidden;
}

.btn-start::before,
.btn-retry::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn-start:hover::before,
.btn-retry:hover::before {
  transform: translateX(100%);
}

.btn .btn-icon {
  font-size: 1.2rem;
  transition: transform 0.2s ease;
}

.btn-next:hover .btn-icon {
  transform: translateX(4px);
}

.btn-retry:hover .btn-icon {
  transform: rotate(180deg);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--text-primary);
  transform: translateY(-2px);
}

/* Quiz Screen Enhancements */
#quiz-header {
  background: var(--surface-color);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-4);
  box-shadow: 0 2px 8px var(--shadow-color);
}

#current-topic {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--accent-color);
  color: white;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

#current-topic::before {
  content: '📚';
  font-size: 1rem;
}

#question-text {
  padding: var(--space-4);
  background: var(--surface-color);
  border-radius: var(--radius);
  box-shadow: 0 2px 12px var(--shadow-color);
  margin-bottom: var(--space-5);
  border-left: 4px solid var(--accent-color);
}

/* Review Screen Enhancements */
.review-header {
  text-align: center;
  margin-bottom: var(--space-5);
  animation: fadeIn 0.5s ease;
  position: relative;
}

/* Success celebration effect */
#review-screen.promosso .review-header::before {
  content: '🎉';
  position: absolute;
  font-size: 3rem;
  animation: celebrateLeft 1s ease infinite;
  left: 10%;
  top: 50%;
}

#review-screen.promosso .review-header::after {
  content: '🎊';
  position: absolute;
  font-size: 3rem;
  animation: celebrateRight 1s ease infinite;
  right: 10%;
  top: 50%;
}

@keyframes celebrateLeft {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(-15deg);
  }
}

@keyframes celebrateRight {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(15deg);
  }
}

.score-container {
  text-align: center;
  padding: var(--space-5);
  background: var(--bg-color);
  border-radius: var(--radius);
  margin-bottom: var(--space-5);
  box-shadow: 0 4px 20px var(--shadow-color);
  animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.score-label {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.score-circle {
  animation: pulse 0.6s ease;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

#quiz-status {
  margin-top: var(--space-3);
  font-size: clamp(1.5rem, 3vw, 2rem);
  animation: slideUp 0.5s ease 0.3s both;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#score-summary {
  margin-top: var(--space-2);
  color: var(--text-secondary);
  font-size: 1.05rem;
  animation: slideUp 0.5s ease 0.4s both;
}

/* History Container Enhanced */
.history-container {
  padding: var(--space-5);
  background: var(--surface-color);
  border-radius: var(--radius);
  box-shadow: 0 2px 12px var(--shadow-color);
  margin-bottom: var(--space-5);
  animation: slideUp 0.5s ease 0.5s both;
}

.history-title {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: clamp(1.2rem, 2vw, 1.4rem);
}

.history-item {
  animation: fadeIn 0.3s ease;
  border-left: 3px solid var(--border-color);
  transition: all 0.2s ease;
}

.history-item:hover {
  border-left-color: var(--accent-color);
  transform: translateX(4px);
}

.btn-danger {
  margin-top: var(--space-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-danger:hover .btn-icon {
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Responsive Enhancements */
@media (max-width: 700px) {
  .setup-actions {
    grid-template-columns: 1fr;
  }
  
  .setup-number {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
  
  .number-btn {
    width: 44px;
    height: 44px;
  }
  
  .input-number {
    width: 100px;
    font-size: 1.6rem;
    height: 60px;
  }
}

@media (max-width: 500px) {
  .setup-box {
    padding: var(--space-4);
  }
  
  .setup-header {
    gap: var(--space-2);
  }
  
  .setup-number {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }
  
  .number-input-wrapper {
    gap: var(--space-2);
  }
  
  .number-btn {
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
  }
  
  .input-number {
    width: 90px;
    font-size: 1.4rem;
    height: 55px;
  }
  
  .btn-start,
  .btn-retry {
    font-size: 1rem;
  }
  
  .history-container,
  .score-container {
    padding: var(--space-4);
  }
}



/* SAFEGUARD: ensure text layers stay visible on selection */
.topic-item label, .topic-item input[type="checkbox"]:checked + label, .topic-item input[type="checkbox"]:checked + label span {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Quiz Actions (Pulsanti Affiancati) */
.quiz-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-5);
}

.btn-report {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-report:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: rgba(37, 99, 235, 0.05);
}

.btn-report .btn-icon {
  font-size: 1.1rem;
}

/* Modal Segnalazione */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--surface-color);
  border-radius: var(--radius);
  padding: var(--space-6);
  max-width: 500px;
  width: 90%;
  box-shadow: 0 20px 60px var(--shadow-color);
  position: relative;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-4);
  font-size: 2rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease;
}

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

.modal-content h2 {
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  font-size: 1.5rem;
}

.modal-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
  font-size: 0.95rem;
}

.form-group select,
.form-group textarea,
.form-group input[type="email"] {
  width: 100%;
  padding: var(--space-3);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-color);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s ease;
}

.form-group select:focus,
.form-group textarea:focus,
.form-group input[type="email"]:focus {
  outline: none;
  border-color: var(--accent-color);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-5);
}

.form-actions button {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

/* Footer */
.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  background: var(--surface-color);
  border-top: 2px solid var(--border-color);
  padding: var(--space-3);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  z-index: 100;
  box-shadow: 0 -2px 10px var(--shadow-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.app-footer p {
  margin: 0;
}

.app-footer a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* Aggiungi padding al body per compensare il footer fisso */
body {
  padding-bottom: 100px;
}

@media (max-width: 600px) {
  .quiz-actions {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .btn-report,
  .quiz-actions .btn-next {
    width: 100%;
    justify-content: center;
  }
  
  .modal-content {
    padding: var(--space-5);
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions button {
    width: 100%;
  }

  .theme-switcher {
    top: 12px;
    right: 12px;
  }

  .app-footer {
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-2);