:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

#drop-zone.drag-over,
#drop-zone:hover {
  border-color: var(--primary);
  background-color: #eff6ff;
}

#drop-zone {
  transition: all 0.2s ease;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

@media (max-width: 640px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  #drop-zone {
    padding: 2rem 1rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
}

input[type="file"] {
  display: none;
}

.shadow-lg {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

#progress-bar {
  transition: width 0.5s ease;
}

a {
  text-decoration: none;
}

input:focus {
  outline: none;
}

.ring-2 {
  box-shadow: 0 0 0 2px var(--primary);
}

html {
  scroll-behavior: smooth;
}

.plano-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

.preco {
  font-size: 28px;
  font-weight: 700;
  color: #1f2937;
}

.btn-comprar {
  background: #10b981;
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn-comprar:hover {
  background: #059669;
  transform: translateY(-2px);
}