:root {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #10b981;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --border-radius: 12px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.checkout-card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  animation: fadeIn 0.4s ease-out;
}

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

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

.amount-display {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 1.5rem 0;
}

.amount-display span {
  font-size: 1.25rem;
  vertical-align: super;
  color: var(--text-secondary);
}

.pix-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.pix-box .qr-placeholder {
  width: 200px;
  height: 200px;
  background: white;
  border: 2px dashed #bbf7d0;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--success);
  font-weight: 600;
}

.btn {
  display: block;
  width: 100%;
  padding: 0.875rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #059669;
  transform: translateY(-1px);
}

.btn-secondary {
  background: white;
  color: var(--text-primary);
  border: 1px solid var(--border);
  margin-top: 1rem;
}

.btn-secondary:hover {
  background: var(--bg-main);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.divider:not(:empty)::before { margin-right: 1rem; }
.divider:not(:empty)::after { margin-left: 1rem; }

.secure-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 1.5rem;
}

/* Status variants */
.status-card {
  text-align: center;
}

.status-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 2rem;
}

.status-icon.success {
  background: #d1fae5;
  color: var(--success);
}

.status-icon.pending {
  background: #fef3c7;
  color: #d97706;
}

.status-icon.error {
  background: #fee2e2;
  color: #dc2626;
}