:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --border-color: #cbd5e1;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --focus-ring: #2563eb;
  
  --correct-bg: #dcfce7;
  --correct-border: #16a34a;
  --correct-text: #14532d;
  
  --wrong-bg: #fee2e2;
  --wrong-border: #dc2626;
  --wrong-text: #7f1d1d;

  --timer-bg: #fef3c7;
  --timer-text: #b45309;
  --modal-overlay: rgba(15, 23, 42, 0.6);
  --error-color: #dc2626;
}

[data-theme="dark"] {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --focus-ring: #60a5fa;

  --correct-bg: #14532d;
  --correct-border: #22c55e;
  --correct-text: #f0fdf4;
  
  --wrong-bg: #7f1d1d;
  --wrong-border: #ef4444;
  --wrong-text: #fef2f2;

  --timer-bg: #78350f;
  --timer-text: #fef3c7;
  --modal-overlay: rgba(0, 0, 0, 0.8);
  --error-color: #ef4444;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 30px 15px;
  transition: background-color 0.3s, color 0.3s;
}

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.app-container {
  max-width: 760px;
  margin: 0 auto;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  gap: 15px;
}

.app-header h1 {
  font-size: 1.8rem;
}

.app-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.btn-theme-toggle, .btn-icon-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.btn-theme-toggle:hover, .btn-icon-toggle:hover {
  border-color: var(--primary-color);
}

.quiz-card {
  background: var(--card-bg);
  padding: 28px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.setup-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control, select, input {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.high-score-box {
  background-color: var(--bg-color);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-weight: 600;
  text-align: center;
}

.btn {
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-full {
  width: 100%;
}

.btn-large {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
}

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

.btn-outline-success {
  background: transparent;
  border: 1px solid #16a34a;
  color: #16a34a;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-outline-success:hover {
  background: #16a34a;
  color: #ffffff;
}

.btn-outline-danger {
  background: transparent;
  border: 1px solid #dc2626;
  color: #dc2626;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-outline-danger:hover {
  background: #dc2626;
  color: #ffffff;
}

.quiz-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  gap: 10px;
  flex-wrap: wrap;
}

.status-badge {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.category-badge {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}

.timer-badge {
  background-color: var(--timer-bg);
  color: var(--timer-text);
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.9rem;
}

.progress-bar-container {
  height: 6px;
  background-color: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 25px;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.question-text {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.option-btn {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: 10px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.option-btn:hover:not([disabled]) {
  border-color: var(--primary-color);
  background-color: var(--bg-color);
}

.option-btn.correct {
  background-color: var(--correct-bg) !important;
  border-color: var(--correct-border) !important;
  color: var(--correct-text) !important;
}

.option-btn.wrong {
  background-color: var(--wrong-bg) !important;
  border-color: var(--wrong-border) !important;
  color: var(--wrong-text) !important;
}

.feedback-box {
  background-color: var(--bg-color);
  padding: 16px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin-top: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
}

.feedback-box.hidden {
  display: none;
}

#result-screen {
  text-align: center;
}

/* AREA STAMPA E PDF (Forza Sfondo BIANCO e Testi NERI) */
.pdf-printable-area {
  background-color: #ffffff !important;
  color: #000000 !important;
  padding: 15px;
  border-radius: 10px;
  text-align: left;
  overflow: visible !important;
  height: auto !important;
  max-height: none !important;
}

.pdf-printable-area * {
  color: #000000 !important;
}

.pdf-printable-area h2 {
  font-size: 1.6rem;
  margin-bottom: 4px;
  text-align: center;
}

.pdf-printable-area .report-date-time {
  color: #444444 !important;
  font-size: 0.85rem;
  text-align: center;
  margin-bottom: 15px;
}

.pdf-printable-area .result-score-box {
  text-align: center;
  background-color: #f1f5f9 !important;
  border: 1px solid #cbd5e1 !important;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 15px;
}

.pdf-printable-area .result-score-box p {
  color: #333333 !important;
}

.pdf-printable-area .result-score-box strong {
  color: #1d4ed8 !important;
  font-size: 2.2rem;
}

.pdf-printable-area .result-message {
  text-align: center;
  margin-bottom: 20px;
  font-weight: 600;
}

.report-details-section h3 {
  font-size: 1.1rem;
  border-bottom: 2px solid #2563eb;
  padding-bottom: 6px;
  margin-bottom: 15px;
}

.report-questions-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.report-q-item {
  background-color: #f8fafc !important;
  border: 1px solid #cbd5e1 !important;
  padding: 12px;
  border-radius: 8px;
  border-left: 5px solid #94a3b8 !important;
  page-break-inside: avoid;
}

.report-q-item.is-correct {
  border-left-color: #16a34a !important;
}

.report-q-item.is-wrong {
  border-left-color: #dc2626 !important;
}

.report-q-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.report-q-answer {
  font-size: 0.88rem;
  margin-bottom: 4px;
}

.report-q-explanation {
  font-size: 0.82rem;
  color: #555555 !important;
  font-style: italic;
}

.export-box {
  background-color: var(--bg-color);
  padding: 16px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.export-box span {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.export-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Modali Admin */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-overlay);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  z-index: 1000;
}

.modal-overlay.hidden {
  display: none;
}

.modal-content {
  background: var(--card-bg);
  color: var(--text-primary);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  max-width: 620px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
}

.modal-small {
  max-width: 380px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.admin-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.admin-field label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.options-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.add-q-box {
  background-color: var(--bg-color);
  padding: 16px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.add-q-box h3 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.q-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.btn-text-danger {
  background: none;
  border: none;
  color: var(--error-color);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.questions-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 250px;
  overflow-y: auto;
}

.q-item {
  background-color: var(--bg-color);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.q-item-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.q-item-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.q-item-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.delete-q-btn {
  background: none;
  border: none;
  color: var(--error-color);
  cursor: pointer;
  font-size: 1.1rem;
}

.login-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.login-error {
  color: var(--error-color);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 10px;
}

.login-error.hidden {
  display: none;
}