:root {
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: #f8fafc;
  background-image: 
        radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(236, 72, 153, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.02) 0%, transparent 50%);
}

.page-wrapper {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}

.auth-home-btn {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 20;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  margin: 0;
  color: var(--color-primary) !important;
}

.auth-home-btn:hover {
  text-decoration: none;
  color: var(--color-primary-dark) !important;
}

.payment-card {
  width: 100%;
  max-width: 940px;
  background: var(--color-bg-primary);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.payment-header h1 {
  margin: 0 0 10px;
  font-size: 2rem;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
}

.payment-header p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.6;
}


.checkout-form {
  gap: 22px;
}

.form-heading h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: var(--color-text-primary);
}

.form-heading p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.payment-form {
  gap: 18px;
}

.form-group {
  display: grid;
  gap: 10px;
}

label,
.form-label {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

input,
select,
textarea {
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

input:focus,
select:focus,
textarea:focus {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
  border-color: var(--color-primary);
}

select {
  appearance: none;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-submit {
  width: 100%;
  border: none;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #ffffff;
  padding: 16px 18px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-submit:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.summary-panel {
  display: grid;
  gap: 18px;
  padding: 24px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.summary-header p {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.summary-item {
  padding: 18px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.summary-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--color-text-primary);
}

.summary-item p {
  margin: 0 0 12px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.summary-item strong {
  font-size: 1.05rem;
  color: var(--color-text-primary);
}

.summary-list {
  display: grid;
  gap: 12px;
  padding: 18px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  color: var(--color-text-secondary);
}

.total-row {
  font-weight: 700;
  color: var(--color-text-primary);
}

.promo-box {
  display: grid;
  gap: 12px;
}

.promo-box input {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
}

.promo-box button {
  width: 100%;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-text-primary);
  color: #ffffff;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 600;
}

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

.summary-note {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 860px) {
  .checkout-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .payment-card {
    padding: 24px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

.text-muted a {
    color: var(--color-primary) !important;
    text-decoration: none;
    font-weight: 500;
}

.text-muted a:hover {
    color: var(--color-primary-dark) !important;
}