:root {
  --primary: #667eea;
  --primary-hover: #5a67d8;
  --bg: #f4f7f6;
  --text: #333;
  --text-muted: #666;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 900px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
  }
}

.section {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

h1,
h2 {
  margin-top: 0;
  color: #1a202c;
}

.card {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
}

.price {
  font-weight: bold;
  color: var(--primary);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  height: 3em;
  overflow: hidden;
}

.pay-button {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s;
  width: 100%;
}

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

.signature-info {
  background: #edf2f7;
  padding: 1rem;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.8rem;
  margin-top: 2rem;
  width: 100%;
  max-width: 900px;
  word-break: break-all;
}
.add-link {
  background-color: #edf2f7;
  color: #2b6cb0;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: bold;
  border: 1px solid #cbd5e0;
  transition: all 0.2s;
}

.add-link:hover {
  background-color: #e2e8f0;
  border-color: #a0aec0;
}

.payment-methods-selection {
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: #f8fafc;
  border-radius: 6px;
  font-size: 0.8rem;
  text-align: left;
}

.payment-methods-selection h4 {
  margin: 0 0 0.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.methods-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.3rem;
}

.method-item {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.method-item input {
  cursor: pointer;
}