* {
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100dvh;
  background: linear-gradient(135deg, #fef2f2 0%, #fff 50%, #f0f9ff 100%);
}

.screen {
  min-height: 100dvh;
}

.category-card:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: white;
  font-weight: 600;
  padding: 16px 32px;
  border-radius: 16px;
  font-size: 1.125rem;
  width: 100%;
  border: none;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: white;
  color: #374151;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 16px;
  font-size: 1rem;
  width: 100%;
  border: 2px solid #e5e7eb;
  cursor: pointer;
  transition: transform 0.1s;
}

.btn-secondary:active {
  transform: scale(0.98);
}

#photo-preview {
  max-height: 200px;
  object-fit: cover;
  border-radius: 12px;
}