.billing-container {
  max-width: 800px;
  margin: 0 auto;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #e6edf3;
}

.billing-header { margin-bottom: 28px; text-align: center; }

.billing-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #e6edf3;
  margin-bottom: 8px;
  border-bottom: none !important;
}

.billing-header p { color: #8b949e; font-size: 15px; }

.billing-card {
  background: #1c2128;
  border-radius: 12px;
  border: 1px solid #30363d;
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.current-credits {
  margin-bottom: 36px;
  background: rgba(34, 197, 94, 0.08);
  padding: 20px 40px;
  border-radius: 10px;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.credit-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #8b949e;
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

.credit-amount { font-size: 48px; font-weight: 800; color: #22c55e; line-height: 1; }

.purchase-section { width: 100%; max-width: 380px; border-top: 1px solid #30363d; padding-top: 28px; }

.purchase-title { font-size: 1rem; font-weight: 600; margin-bottom: 18px; color: #8b949e; }

.btn-primary-large {
  display: inline-block;
  width: 100%;
  padding: 14px 22px;
  background: #22c55e;
  color: #0d1117;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.15s ease;
  text-decoration: none;
  box-sizing: border-box;
}

.btn-primary-large:hover { opacity: 0.88; }
.btn-primary-large:active { opacity: 0.75; }

.billing-features { display: flex; justify-content: center; gap: 20px; margin-top: 24px; font-size: 13px; color: #8b949e; flex-wrap: wrap; }
.feature-item { display: flex; align-items: center; gap: 5px; }
.feature-icon { color: #22c55e; }