/* ===== CHECKOUT PAGE ===== */
.checkout-page {
  background: var(--bg-alt);
}

.checkout-section {
  padding: 100px 0 60px;
  min-height: calc(100vh - 64px);
}

.checkout-container {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  align-items: start;
  max-width: 860px;
  margin: 0 auto;
}

/* ===== FORM ===== */
.checkout-form-wrapper {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 40px;
}

.checkout-form-wrapper h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 4px;
}

.checkout-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.optional {
  font-weight: 400;
  color: var(--text-secondary);
  font-size: 13px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: white;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group input::placeholder {
  color: #9CA3AF;
}

.form-hint {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== PLAN CARD ===== */
.plan-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s;
}

.plan-card:hover {
  border-color: #93c5fd;
}

.plan-card.plan-active {
  border-color: var(--primary);
  background: var(--primary-light);
}

.plan-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}

.plan-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.plan-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  white-space: nowrap;
}

.plan-price span {
  font-size: 13px;
  font-weight: 500;
}

/* ===== SUBMIT BUTTON ===== */
#submitBtn {
  margin-top: 8px;
  position: relative;
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-loading::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.checkout-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 16px;
}

/* ===== SUMMARY ===== */
.checkout-summary {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 32px;
  position: sticky;
  top: 96px;
}

.checkout-summary h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.summary-total {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0;
}

.summary-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.summary-features {
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
}

.summary-features h4 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.summary-features li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
}

.summary-guarantee {
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

/* ===== SUCCESS STATE ===== */
.checkout-success {
  text-align: center;
  padding: 60px 40px;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: #ECFDF5;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 40px;
}

.checkout-success h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}

.checkout-success p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.invoice-link {
  display: inline-block;
  margin-bottom: 16px;
}

/* ===== ERROR STATE ===== */
.checkout-error {
  text-align: center;
  padding: 60px 40px;
}

.error-icon {
  width: 80px;
  height: 80px;
  background: #FEF2F2;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 40px;
}

.form-error {
  background: #FEF2F2;
  color: #DC2626;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.form-error.active {
  display: block;
}

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

  .checkout-form-wrapper {
    padding: 28px 20px;
  }

  .checkout-summary {
    position: static;
  }

  .checkout-section {
    padding: 80px 0 40px;
  }
}