.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.onboarding-body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

.onboarding-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

.onboarding-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.onboarding-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.onboarding-logo img {
  border-radius: 8px;
}

.onboarding-logo strong {
  color: var(--primary);
}

.onboarding-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.onboarding-close:hover {
  background: var(--bg-alt);
  color: var(--text);
}

.onboarding-close:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.onboarding-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px 20px;
  padding-bottom: 100px;
}

.onboarding-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

.progress-track {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.onboarding-form {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.onboarding-step {
  display: none;
  animation: fadeIn 0.3s ease;
}

.onboarding-step.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.step-description {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.form-fieldset {
  border: none;
  padding: 0;
  margin: 0 0 24px 0;
}

.fieldset-legend {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  display: block;
}

.option-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-cards-row {
  flex-direction: row;
  flex-wrap: wrap;
}

.option-card {
  position: relative;
  display: flex;
  align-items: center;
  padding: 16px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  min-height: 56px;
}

.option-cards-row .option-card {
  flex: 1;
  min-width: calc(33.333% - 8px);
}

.option-card:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.option-card:focus-within {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.option-card input[type="radio"],
.option-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.option-card input:checked + .option-card-content {
  color: var(--primary);
}

.option-card input:checked ~ .option-check {
  background: var(--primary);
  border-color: var(--primary);
}

.option-card input:checked ~ .option-check::after {
  opacity: 1;
  transform: scale(1);
}

.option-card:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.option-card-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.option-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  margin-right: 14px;
  color: var(--primary);
  flex-shrink: 0;
}

.option-card:has(input:checked) .option-icon {
  background: var(--primary);
  color: #fff;
}

.option-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

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

.option-check {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
  margin-left: 12px;
  position: relative;
  transition: all var(--transition);
}

.option-check::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  opacity: 0;
  transition: all var(--transition);
}

.option-card-compact {
  justify-content: center;
  text-align: center;
  padding: 14px 12px;
}

.option-card-compact .option-card-content {
  align-items: center;
}

.option-card-compact .option-check {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 18px;
  height: 18px;
  margin: 0;
}

.option-card-compact .option-check::after {
  width: 6px;
  height: 6px;
}

.checkbox-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checkbox-card {
  position: relative;
  display: flex;
  align-items: center;
  padding: 16px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.checkbox-card:hover {
  border-color: var(--primary);
}

.checkbox-card:focus-within {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.checkbox-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.checkbox-card:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.checkbox-card-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.checkbox-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  margin-right: 14px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.checkbox-card:has(input:checked) .checkbox-icon {
  background: var(--primary);
  color: #fff;
}

.checkbox-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

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

.checkbox-check {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-radius: 6px;
  flex-shrink: 0;
  margin-left: 12px;
  position: relative;
  transition: all var(--transition);
}

.checkbox-card input:checked ~ .checkbox-check {
  background: var(--primary);
  border-color: var(--primary);
}

.checkbox-check::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 6px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity var(--transition);
}

.checkbox-card input:checked ~ .checkbox-check::after {
  opacity: 1;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.form-select {
  width: 100%;
  padding: 14px 16px;
  padding-right: 44px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2352525b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
  transition: all var(--transition);
}

.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.5;
}

.score-input-wrapper {
  display: flex;
  gap: 16px;
  align-items: center;
}

.score-range {
  flex: 1;
  height: 8px;
  appearance: none;
  background: var(--border);
  border-radius: 4px;
  cursor: pointer;
}

.score-range::-webkit-slider-thumb {
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.score-range::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

.score-input {
  width: 80px;
  text-align: center;
  font-weight: 600;
  flex-shrink: 0;
}

.info-card {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: var(--primary-light);
  border-radius: var(--radius);
  margin-top: 24px;
}

.info-card-icon {
  flex-shrink: 0;
  color: var(--primary);
}

.info-card-content {
  font-size: 0.9rem;
  line-height: 1.5;
}

.info-card-content strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
}

.info-card-content p {
  margin: 0;
  color: var(--text-secondary);
}

.info-card-content a {
  color: var(--primary);
  font-weight: 500;
}

.exam-results-section {
  margin-top: 24px;
  animation: fadeIn 0.3s ease;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.result-card {
  padding: 16px;
  background: var(--bg-alt);
  border-radius: var(--radius);
}

.result-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.result-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-input-group label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  width: 50px;
}

.result-input {
  flex: 1;
  padding: 10px 12px;
  font-size: 0.95rem;
  text-align: center;
}

.result-net {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.result-net-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.result-net-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

.estimated-score {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--primary-light);
  border-radius: var(--radius);
  margin-top: 16px;
}

.estimated-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}

.estimated-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.countdown-info {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  color: #fff;
  margin-top: 24px;
}

.countdown-icon {
  flex-shrink: 0;
  opacity: 0.9;
}

.countdown-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.countdown-text strong {
  font-size: 0.9rem;
}

.countdown-text span {
  font-size: 1.25rem;
  font-weight: 700;
}

.step-content-summary {
  text-align: center;
}

.summary-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: var(--success-light);
  border-radius: 50%;
  color: var(--success);
  margin-bottom: 24px;
}

.summary-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
  text-align: left;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.summary-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.plan-recommendation {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 20px;
  text-align: left;
}

.plan-recommendation h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.plan-recommendation p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.onboarding-actions {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  background: var(--bg);
  border-top: 1px solid var(--border);
  max-width: 600px;
  margin: 0 auto;
}

.btn-back,
.btn-next {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  min-height: 52px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-back {
  background: var(--bg);
  color: var(--text);
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.btn-back:hover:not(:disabled) {
  border-color: var(--text-secondary);
  background: var(--bg-alt);
}

.btn-back:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-back:focus-visible,
.btn-next:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-next {
  flex: 1;
  background: var(--primary);
  color: #fff;
  border: none;
  text-decoration: none;
}

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

.btn-finish {
  background: var(--success);
}

.btn-finish:hover {
  background: #047857;
}

@media (max-width: 480px) {
  .onboarding-main {
    padding: 20px 16px;
    padding-bottom: 100px;
  }

  .step-title {
    font-size: 1.35rem;
  }

  .step-description {
    font-size: 0.95rem;
  }

  .option-cards-row .option-card {
    min-width: calc(50% - 6px);
  }

  .option-card-compact {
    padding: 12px 10px;
  }

  .option-label {
    font-size: 0.9rem;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

  .onboarding-actions {
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }

  .btn-back,
  .btn-next {
    padding: 14px 16px;
  }
}

@media (min-width: 768px) {
  .onboarding-container {
    padding: 24px;
  }

  .onboarding-header {
    border-radius: var(--radius) var(--radius) 0 0;
    margin-top: 40px;
  }

  .onboarding-main {
    padding: 32px;
    padding-bottom: 120px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow-lg);
  }

  .onboarding-actions {
    position: sticky;
    margin-top: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
}

@media (prefers-reduced-motion: reduce) {
  .onboarding-step,
  .exam-results-section,
  .progress-fill {
    animation: none;
    transition: none;
  }
}