/**
 * BlueCart Checkout Page - Modern CSS
 * Comprehensive checkout flow styles using unified design system
 * Updated to match homepage standards and use master.css variables
 */

/* ========================================
   ACCESSIBILITY SKIP LINK
   ======================================== */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--bluecart-primary);
  color: var(--font-size-lg);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  z-index: 10000;
  transition: left 0.3s ease;
  text-decoration: none;
}

.skip-link:focus {
  left: 12px;
  outline: 3px solid var(--bluecart-focus);
}

/* ========================================
   BASE STYLES
   ======================================== */

.checkout-page {
  background: var(--slate-50);
  min-height: 100vh;
  font-family: var(--font-family);
  line-height: 1.6;
}

/* ========================================
   CHECKOUT CONTAINER
   ======================================== */

.checkout-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-6);
  padding-top: var(--spacing-8);
  width: 100%;
  box-sizing: border-box;
}

.checkout-main {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--spacing-8);
  align-items: start;
  width: 100%;
}

/* ========================================
   CHECKOUT FORMS
   ======================================== */

.checkout-forms {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.form-section {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--slate-200);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-3);
  border-bottom: 2px solid var(--slate-100);
}

.section-icon {
  font-size: var(--font-size-2xl);
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--font-size-lg);
}

.required {
  color: var(--bluecart-danger);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-3);
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  background: var(--bg-primary);
  color: var(--font-size-lg);
  transition: var(--transition-medium);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--bluecart-primary);
  box-shadow: 0 0 0 3px rgba(46, 134, 193, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--font-size-lg);
}

/* ========================================
   SEARCHABLE DROPDOWN
   ======================================== */

.searchable-dropdown {
  position: relative;
}

.dropdown-input-wrapper {
  position: relative;
}

.dropdown-toggle {
  position: absolute;
  right: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-1);
}

.dropdown-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 200px;
  overflow-y: auto;
  z-index: 50;
  display: none;
}

.dropdown-list.open {
  display: block;
}

.dropdown-toggle.open {
  transform: translateY(-50%) rotate(180deg);
}

.dropdown-item {
  padding: var(--spacing-3);
  cursor: pointer;
  transition: var(--transition-medium);
  border-bottom: 1px solid var(--slate-100);
}

.dropdown-item:hover {
  background: var(--slate-50);
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item.selected {
  background: rgba(46, 134, 193, 0.05);
  color: var(--bluecart-primary);
}

.dropdown-item.no-results {
  cursor: default;
  color: var(--font-size-lg);
  font-style: italic;
}

.location-name {
  font-weight: 600;
  color: var(--font-size-lg);
}

.location-zone {
  color: var(--font-size-lg);
  font-size: var(--font-size-lg);
  margin-left: var(--spacing-2);
}

/* ========================================
   DELIVERY CALCULATOR
   ======================================== */

.delivery-calculator {
  background: var(--slate-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  margin-top: var(--spacing-4);
  border: 1px solid var(--slate-200);
}

.calculator-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-4);
}

.calculator-icon {
  font-size: var(--font-size-lg);
}

.location-info,
.fee-calculation {
  margin-bottom: var(--spacing-4);
}

.info-row,
.fee-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2);
  font-size: var(--font-size-lg);
}

.info-label,
.fee-label {
  color: var(--font-size-lg);
  font-weight: 500;
}

.info-value,
.fee-amount {
  color: var(--font-size-lg);
  font-weight: var(--font-semibold);
}

.btn-recalculate {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  background: var(--bluecart-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-medium);
}

.btn-recalculate:hover {
  background: var(--bluecart-primary-dark);
}

/* ========================================
   PAYMENT METHODS
   ======================================== */

.payment-methods {
  display: grid;
  gap: var(--spacing-4);
}

.payment-option {
  background: var(--bg-primary);
  border: 2px solid var(--slate-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-medium);
  position: relative;
}

.payment-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-medium);
  z-index: 0;
}

.payment-option:hover {
  border-color: var(--bluecart-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.payment-option:hover::before {
  opacity: 0.05;
}

.payment-option.primary-payment {
  border-color: var(--bluecart-primary);
  background: rgba(46, 134, 193, 0.05);
  box-shadow: var(--shadow-lg);
}

.payment-option.primary-payment::before {
  opacity: 0.1;
}

.payment-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.payment-option input[type="radio"]:checked + .payment-label {
  background: var(--bluecart-primary-10);
}

.payment-option input[type="radio"]:checked + .payment-label::after {
  content: '✓';
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-4);
  background: var(--bluecart-primary);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.payment-label {
  display: block;
  padding: var(--spacing-5);
  cursor: pointer;
  width: 100%;
  position: relative;
  z-index: 1;
  transition: all var(--transition-medium);
}

.payment-label:hover {
  background: var(--slate-50);
}

.payment-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

.payment-details {
  flex: 1;
}

.payment-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.primary-badge {
  background: var(--gradient-primary);
  color: white;
  font-size: var(--font-size-lg);
  font-weight: 500;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
}

.payment-description {
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
  line-height: 1.5;
}

.payment-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--slate-100);
  flex-shrink: 0;
}

.crypto-icon {
  background: var(--gradient-primary);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-lg);
}

.payment-option:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--slate-50);
}

.payment-option:disabled:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--slate-200);
}

.payment-option:disabled .payment-label {
  cursor: not-allowed;
}

.payment-option:disabled .payment-description {
  color: var(--font-size-lg);
}

/* ========================================
   REFERRAL CODE SECTION
   ======================================== */

.referral-code-section {
  background: var(--yellow-50);
  border: 1px solid var(--yellow-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  margin-top: var(--spacing-4);
}

.referral-code-section .form-group {
  display: flex;
  flex-direction: row;
  align-items: end;
  gap: var(--spacing-3);
  margin-bottom: 0;
}

.referral-code-section input {
  flex: 1;
}

/* ========================================
   TERMS AGREEMENT
   ======================================== */

.terms-agreement {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-6);
  padding: var(--spacing-4);
  background: var(--slate-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
}

.terms-agreement input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--bluecart-primary);
}

.terms-agreement label {
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
  cursor: pointer;
}

.terms-agreement a {
  color: var(--bluecart-primary);
  text-decoration: none;
  font-weight: 500;
}

.terms-agreement a:hover {
  text-decoration: underline;
}

/* ========================================
   PLACE ORDER BUTTON
   ======================================== */

.place-order-btn {
  width: 100%;
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: var(--transition-medium);
  position: relative;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.place-order-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.place-order-btn:disabled {
  background: var(--slate-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-spinner {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ========================================
   ORDER SUMMARY
   ======================================== */

.order-summary-container {
  position: sticky;
  top: var(--spacing-4);
  height: fit-content;
}

.order-summary {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--slate-200);
}

.summary-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
  text-align: center;
  padding-bottom: var(--spacing-3);
  border-bottom: 2px solid var(--slate-100);
}

.cart-items {
  margin-bottom: var(--spacing-6);
}

.cart-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--slate-100);
}

.cart-item:last-child {
  border-bottom: none;
}

.item-image {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: var(--slate-100);
}

.item-details {
  flex: 1;
}

.item-name {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-1);
}

.item-price {
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
}

.item-quantity {
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
  background: var(--slate-100);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ========================================
   ORDER TOTALS
   ======================================== */

.order-totals {
  border-top: 1px solid var(--slate-200);
  padding-top: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-3);
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
}

.total-row.total-final {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--font-size-lg);
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 2px solid var(--slate-200);
}

.total-final span:last-child {
  color: var(--bluecart-primary);
}

/* ========================================
   SUMMARY ACTIONS
   ======================================== */

.summary-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.checkout-page .btn-outline {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  background: transparent;
  color: var(--bluecart-primary);
  border: 2px solid var(--bluecart-primary);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-medium);
}

.checkout-page .btn-outline:hover {
  background: rgba(46, 134, 193, 0.05);
}

/* ========================================
   EMPTY CART MESSAGE
   ======================================== */

.empty-cart-message {
  text-align: center;
  padding: var(--spacing-12);
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--slate-200);
}

.empty-cart-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-4);
  opacity: 0.5;
}

.empty-cart-message h2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-3);
}

.empty-cart-message p {
  font-size: var(--font-size-lg);
  color: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
}

.checkout-page .btn-primary {
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-6);
  background: var(--gradient-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 500;
  transition: var(--transition-medium);
}

.checkout-page .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.checkout-page .btn-secondary {
  display: inline-block;
  padding: var(--spacing-2) var(--spacing-4);
  background: var(--slate-100);
  color: var(--font-size-lg);
  text-decoration: none;
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 500;
  transition: var(--transition-medium);
  cursor: pointer;
  border: none;
}

.checkout-page .btn-secondary:hover {
  background: var(--slate-200);
}

/* ========================================
   MODAL STYLES
   ======================================== */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--slate-200);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--font-size-lg);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-1);
}

.modal-close:hover {
  color: var(--font-size-lg);
}

.modal-body {
  padding: var(--spacing-6);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
  .checkout-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .order-summary-container {
    position: static;
    order: -1;
  }
}

@media (max-width: 768px) {
  .checkout-container {
    padding: 0 var(--spacing-4);
    max-width: 100%;
  }
  
  .checkout-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .form-section {
    padding: var(--spacing-4);
  }
  
  .order-summary {
    padding: var(--spacing-4);
  }
  
  .section-title {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 480px) {
  .checkout-container {
    padding: var(--spacing-4);
    padding-top: var(--spacing-6);
    max-width: 100%;
  }
  
  .checkout-main {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }
  
  .form-section {
    padding: var(--spacing-3);
    margin-bottom: var(--spacing-3);
  }
  
  .order-summary {
    padding: var(--spacing-3);
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }
  
  .form-input {
    width: 100%;
    box-sizing: border-box;
  }
  
  .section-title {
    font-size: var(--font-size-lg);
  }
  
  .empty-cart-message {
    padding: var(--spacing-8);
  }
  
  .empty-cart-icon {
    font-size: 3rem;
  }
  
  .payment-option {
    padding: var(--spacing-3);
  }
  
  .place-order-btn {
    font-size: var(--font-size-lg);
  }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

*:focus {
  outline: 2px solid var(--bluecart-primary);
  outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .form-section,
  .order-summary {
    border: 2px solid var(--font-size-lg);
  }
  
  .payment-option {
    border-width: 3px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    transition-duration: 0.01ms;
    scroll-behavior: auto;
  }
  
  .place-order-btn:hover,
  .checkout-page .btn-primary:hover {
    transform: none;
  }
}