/* ===========================
   SECO COSMETICS - CHECKOUT
   Cart & Checkout styles

   NOTE: Universal form utilities (.seco-input, .seco-select, etc.)
   are defined in custom.css for project-wide reusability
   =========================== */

/* ===========================
   CHECKOUT HEADER
   =========================== */
.checkout-header {
   background: var(--color-bg);
   border-bottom: 1px solid var(--color-border);
   padding: var(--space-md) 0;
}

.checkout-header .container {
   display: flex;
   align-items: center;
   justify-content: space-between;
}

.checkout-header__logo {
   font-family: var(--font-base);
   font-size: 1.125rem;
   font-weight: var(--fw-bold);
   letter-spacing: 0.1em;
   color: var(--color-text);
   text-decoration: none;
}

/* Steps */
.checkout-header__steps {
   display: flex;
   align-items: center;
   gap: var(--space-xl);
}

.checkout-step {
   display: flex;
   align-items: center;
   gap: var(--space-sm);
   color: var(--color-text-muted);
}

.checkout-step.active {
   color: var(--color-text);
}

.checkout-step.active .checkout-step__num {
   background: var(--color-text);
   color: var(--color-text-inverse);
}

.checkout-step.completed .checkout-step__num {
   background: #4CAF50;
   color: var(--color-text-inverse);
}

.checkout-step__num {
   width: 28px;
   height: 28px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: var(--color-bg-alt);
   border-radius: 50%;
   font-size: 0.75rem;
   font-weight: var(--fw-bold);
}

.checkout-step__label {
   font-size: 0.8125rem;
   font-weight: var(--fw-medium);
}

.checkout-header__secure {
   display: flex;
   align-items: center;
   gap: var(--space-xs);
   font-size: 0.75rem;
   color: var(--color-text-muted);
   text-decoration: none;
}

.checkout-header__secure i {
   color: #4CAF50;
}

/* ===========================
   CHECKOUT LAYOUT
   =========================== */
.checkout-main {
   padding: var(--space-xl) 0 var(--space-3xl);
   background: var(--color-bg);
}

.checkout-layout {
   display: grid;
   grid-template-columns: 1fr 380px;
   gap: var(--space-xl);
   align-items: start;
}

/* ===========================
   CHECKOUT SECTIONS
   =========================== */
.checkout-section {
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   padding: var(--space-lg);
   margin-bottom: var(--space-lg);
}

.checkout-section__title {
   display: flex;
   align-items: center;
   gap: var(--space-md);
   font-size: 1.125rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
   margin: 0 0 var(--space-lg);
}

.checkout-section__num {
   width: 32px;
   height: 32px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: var(--color-bg-dark);
   color: var(--color-text-inverse);
   border-radius: 50%;
   font-size: 0.875rem;
}

.cart-count {
   font-size: 0.875rem;
   font-weight: var(--fw-medium);
   color: var(--color-text-muted);
}

/* Subsection */
.checkout-subsection {
   margin-bottom: var(--space-xl);
}

.checkout-subsection:last-child {
   margin-bottom: 0;
}

.checkout-subsection__title {
   font-size: 0.875rem;
   font-weight: var(--fw-semibold);
   color: var(--color-text);
   margin: 0 0 var(--space-md);
   text-transform: uppercase;
   letter-spacing: 0.05em;
}

/* ===========================
   CART ITEMS
   =========================== */
.cart-items {
   display: flex;
   flex-direction: column;
   gap: var(--space-md);
   margin-bottom: var(--space-lg);
}

.cart-item {
   display: grid;
   grid-template-columns: 80px 1fr auto auto 40px;
   gap: var(--space-md);
   align-items: center;
   padding: var(--space-md);
   background: var(--color-bg-alt);
   border-radius: var(--radius-md);
}

.cart-item__image {
   width: 80px;
   height: 80px;
   background: var(--color-bg);
   border-radius: var(--radius-sm);
   overflow: hidden;
}

.cart-item__image img {
   width: 100%;
   height: 100%;
   object-fit: cover;
}

.cart-item__details {
   display: flex;
   flex-direction: column;
   gap: 4px;
}

.cart-item__name {
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
   color: var(--color-text);
   margin: 0;
}

.cart-item__meta {
   font-size: 0.75rem;
   color: var(--color-text-muted);
   margin: 0;
}

.cart-item__points {
   font-size: 0.6875rem;
   color: var(--color-accent);
   font-weight: var(--fw-medium);
}

/* Quantity */
.cart-item__qty {
   display: flex;
   align-items: center;
   border: 1px solid var(--color-border);
   border-radius: var(--radius-sm);
   background: var(--color-bg);
}

.qty-btn {
   width: 32px;
   height: 32px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: transparent;
   border: none;
   font-size: 1rem;
   color: var(--color-text);
   cursor: pointer;
}

.qty-btn:hover {
   background: var(--color-bg-alt);
}

.qty-input {
   width: 40px;
   height: 32px;
   border: none;
   text-align: center;
   font-family: var(--font-base);
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
   -moz-appearance: textfield;
}

.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
   -webkit-appearance: none;
   margin: 0;
}

/* Price */
.cart-item__price {
   text-align: right;
}

.cart-item__price-current {
   display: block;
   font-size: var(--fs-body);
   font-weight: var(--fw-bold);
   color: var(--color-text);
}

.cart-item__price-unit {
   font-size: 0.6875rem;
   color: var(--color-text-muted);
}

/* Remove */
.cart-item__remove {
   width: 32px;
   height: 32px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: transparent;
   border: none;
   color: var(--color-text-muted);
   cursor: pointer;
   transition: var(--transition-base);
}

.cart-item__remove:hover {
   color: var(--color-accent);
}

/* ===========================
   PROMO CODE
   =========================== */
.cart-promo {
   padding-top: var(--space-md);
   border-top: 1px solid var(--color-border);
}

.cart-promo__input {
   display: flex;
   gap: var(--space-sm);
}

.cart-promo__input input {
   flex: 1;
   padding: var(--space-sm) var(--space-md);
   border: 1px solid var(--color-border);
   border-radius: var(--radius-sm);
   font-family: var(--font-base);
   font-size: var(--fs-small);
}

.cart-promo__input button {
   padding: var(--space-sm) var(--space-lg);
   background: var(--color-bg-dark);
   border: none;
   border-radius: var(--radius-sm);
   color: var(--color-text-inverse);
   font-family: var(--font-base);
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
   cursor: pointer;
   transition: var(--transition-base);
}

.cart-promo__input button:hover {
   background: var(--color-accent);
}

/* ===========================
   CHECKOUT FORM
   =========================== */
.checkout-form {
   display: flex;
   flex-direction: column;
   gap: var(--space-md);
}

.checkout-form .form-group {
   display: flex;
   flex-direction: column;
   gap: var(--space-xs);
}

.checkout-form label {
   font-size: 0.8125rem;
   font-weight: var(--fw-medium);
   color: var(--color-text);
}

/* Checkout form inherits from universal utilities */
.checkout-form input,
.checkout-form select,
.checkout-form textarea {
   padding: var(--space-md);
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   border-radius: var(--radius-sm);
   font-family: var(--font-base);
   font-size: var(--fs-small);
   width: 100%;
   transition: border-color 0.2s ease;
}

.checkout-form input:focus,
.checkout-form select:focus,
.checkout-form textarea:focus {
   outline: none;
   border-color: var(--color-text);
}

.form-row-2 {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: var(--space-md);
}

/* ===========================
   DELIVERY OPTIONS
   =========================== */
.delivery-options {
   display: flex;
   flex-direction: column;
   gap: var(--space-sm);
}

.delivery-option {
   cursor: pointer;
}

.delivery-option input {
   display: none;
}

.delivery-option__content {
   display: flex;
   align-items: center;
   gap: var(--space-md);
   padding: var(--space-md);
   background: var(--color-bg-alt);
   border: 2px solid transparent;
   border-radius: var(--radius-md);
   transition: var(--transition-base);
}

.delivery-option input:checked + .delivery-option__content {
   border-color: var(--color-text);
   background: var(--color-bg);
}

.delivery-option__icon {
   width: 48px;
   height: 48px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: var(--color-bg);
   border-radius: var(--radius-sm);
   font-size: 1.25rem;
   color: var(--color-text);
}

.delivery-option input:checked + .delivery-option__content .delivery-option__icon {
   background: var(--color-bg-dark);
   color: var(--color-text-inverse);
}

.delivery-option__info {
   flex: 1;
}

.delivery-option__info strong {
   display: block;
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
}

.delivery-option__info span {
   font-size: 0.75rem;
   color: var(--color-text-muted);
}

.delivery-option__price {
   font-size: var(--fs-body);
   font-weight: var(--fw-bold);
   color: var(--color-text);
}

/* ===========================
   PAYMENT OPTIONS
   =========================== */
.payment-options {
   display: grid;
   grid-template-columns: repeat(4, 1fr);
   gap: var(--space-sm);
}

.payment-option {
   cursor: pointer;
}

.payment-option input {
   display: none;
}

.payment-option__content {
   display: flex;
   flex-direction: column;
   align-items: center;
   gap: var(--space-sm);
   padding: var(--space-md);
   background: var(--color-bg-alt);
   border: 2px solid transparent;
   border-radius: var(--radius-md);
   transition: var(--transition-base);
   text-align: center;
}

.payment-option input:checked + .payment-option__content {
   border-color: var(--color-text);
   background: var(--color-bg);
}

.payment-option__icon {
   height: 32px;
   display: flex;
   align-items: center;
   justify-content: center;
   font-size: 1.25rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
}

.payment-option__content span {
   font-size: 0.75rem;
   color: var(--color-text-muted);
}

/* ===========================
   CHECKOUT SUMMARY
   =========================== */
.checkout-summary__sticky {
   position: sticky;
   top: var(--space-lg);
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   padding: var(--space-lg);
}

.checkout-summary__title {
   font-size: 1.125rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
   margin: 0 0 var(--space-lg);
   padding-bottom: var(--space-md);
   border-bottom: 1px solid var(--color-border);
}

.checkout-summary__row {
   display: flex;
   justify-content: space-between;
   padding: var(--space-sm) 0;
   font-size: var(--fs-small);
   color: var(--color-text);
}

.checkout-summary__row--discount span:last-child {
   color: #4CAF50;
}

.checkout-summary__total {
   display: flex;
   justify-content: space-between;
   padding: var(--space-md) 0;
   margin-top: var(--space-sm);
   border-top: 2px solid var(--color-border);
   font-size: 1.25rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
}

.checkout-summary__points {
   display: flex;
   align-items: center;
   gap: var(--space-sm);
   padding: var(--space-sm) var(--space-md);
   background: rgba(227, 70, 54, 0.1);
   border-radius: var(--radius-sm);
   margin: var(--space-md) 0;
   font-size: 0.8125rem;
   color: var(--color-accent);
}

.checkout-summary__points i {
   font-size: 1rem;
}

.checkout-summary__btn {
   width: 100%;
   padding: var(--space-md);
   background: var(--color-accent);
   border: none;
   border-radius: var(--radius-pill);
   color: var(--color-text-inverse);
   font-family: var(--font-base);
   font-size: var(--fs-body);
   font-weight: var(--fw-bold);
   text-transform: uppercase;
   letter-spacing: 0.05em;
   cursor: pointer;
   transition: var(--transition-base);
}

.checkout-summary__btn:hover {
   background: var(--color-accent-dark);
}

.checkout-summary__btn:disabled,
.checkout-summary__btn.disabled {
   background: #ccc;
   color: #666;
   cursor: not-allowed;
   opacity: 0.6;
}

.checkout-summary__btn:disabled:hover,
.checkout-summary__btn.disabled:hover {
   background: #ccc;
}

.checkout-summary__btn-message {
   display: block;
   margin-top: 0.5rem;
   font-size: 0.75rem;
   color: var(--color-text-muted);
   text-align: center;
   line-height: 1.4;
}

.checkout-summary__terms {
   margin-top: var(--space-md);
}

.checkout-summary__terms .checkbox-label {
   font-size: 0.75rem;
   color: var(--color-text-muted);
   align-items: flex-start;
}

.checkout-summary__terms a {
   color: var(--color-accent);
   text-decoration: none;
}

.checkout-summary__secure {
   display: flex;
   align-items: center;
   justify-content: center;
   gap: var(--space-sm);
   margin-top: var(--space-lg);
   padding-top: var(--space-md);
   border-top: 1px solid var(--color-border);
   font-size: 0.75rem;
   color: var(--color-text-muted);
}

.checkout-summary__secure i {
   color: #4CAF50;
}

.checkout-summary__payments {
   display: flex;
   align-items: center;
   justify-content: center;
   gap: var(--space-md);
   margin-top: var(--space-md);
}

.checkout-summary__payments img {
   height: 24px;
   opacity: 0.5;
}

/* Checkbox from auth */
.checkbox-label {
   display: flex;
   align-items: center;
   gap: var(--space-sm);
   font-size: 0.8125rem;
   color: var(--color-text);
   cursor: pointer;
}

.checkbox-label input {
   display: none;
}

.checkbox-label .checkmark {
   width: 18px;
   height: 18px;
   min-width: 18px;
   border: 2px solid var(--color-border);
   border-radius: 4px;
   display: flex;
   align-items: center;
   justify-content: center;
   transition: var(--transition-base);
}

.checkbox-label input:checked + .checkmark {
   background: var(--color-text);
   border-color: var(--color-text);
}

.checkbox-label input:checked + .checkmark::after {
   content: '\f00c';
   font-family: 'Font Awesome 6 Free';
   font-weight: 900;
   font-size: 0.625rem;
   color: var(--color-text-inverse);
}

/* ===========================
   ORDER CONFIRMATION
   =========================== */
.order-confirmation {
   max-width: 600px;
   margin: 0 auto;
   text-align: center;
   padding: var(--space-3xl) var(--space-lg);
}

.order-confirmation__icon {
   width: 80px;
   height: 80px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: #4CAF50;
   border-radius: 50%;
   margin: 0 auto var(--space-xl);
   font-size: 2rem;
   color: var(--color-text-inverse);
}

.order-confirmation__title {
   font-size: 1.75rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
   margin: 0 0 var(--space-md);
}

.order-confirmation__text {
   font-size: var(--fs-body);
   color: var(--color-text-muted);
   margin: 0 0 var(--space-xl);
}

.order-confirmation__number {
   display: inline-block;
   padding: var(--space-md) var(--space-xl);
   background: var(--color-bg-alt);
   border-radius: var(--radius-md);
   font-size: 1.125rem;
   font-weight: var(--fw-bold);
   color: var(--color-text);
   margin-bottom: var(--space-xl);
}

.order-confirmation__actions {
   display: flex;
   gap: var(--space-md);
   justify-content: center;
}

.order-confirmation__btn {
   padding: var(--space-md) var(--space-xl);
   border-radius: var(--radius-pill);
   font-family: var(--font-base);
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
   text-transform: uppercase;
   letter-spacing: 0.05em;
   text-decoration: none;
   transition: var(--transition-base);
}

.order-confirmation__btn--primary {
   background: var(--color-bg-dark);
   color: var(--color-text-inverse);
}

.order-confirmation__btn--primary:hover {
   background: var(--color-accent);
}

.order-confirmation__btn--secondary {
   background: transparent;
   border: 2px solid var(--color-bg-dark);
   color: var(--color-text);
}

.order-confirmation__btn--secondary:hover {
   background: var(--color-bg-dark);
   color: var(--color-text-inverse);
}

/* ===========================
   ORDER DETAILS
   =========================== */
.order-details {
   max-width: 900px;
   margin: 0 auto;
}

.order-details__grid {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: var(--space-lg);
   margin-bottom: var(--space-xl);
}

.order-details__section {
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   padding: var(--space-lg);
}

.order-details__products {
   grid-column: 1 / -1;
}

.order-details__title {
   font-size: 0.875rem;
   font-weight: var(--fw-bold);
   text-transform: uppercase;
   letter-spacing: 0.05em;
   color: var(--color-text);
   margin: 0 0 var(--space-md);
}

/* Products list */
.order-products-list {
   display: flex;
   flex-direction: column;
   gap: var(--space-sm);
}

.order-product {
   display: grid;
   grid-template-columns: 60px 1fr auto auto;
   gap: var(--space-md);
   align-items: center;
   padding: var(--space-sm);
   background: var(--color-bg-alt);
   border-radius: var(--radius-sm);
}

.order-product__image {
   width: 60px;
   height: 60px;
   border-radius: var(--radius-sm);
   overflow: hidden;
}

.order-product__image img {
   width: 100%;
   height: 100%;
   object-fit: cover;
}

.order-product__info h3 {
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
   margin: 0;
}

.order-product__info p {
   font-size: 0.75rem;
   color: var(--color-text-muted);
   margin: 0;
}

.order-product__qty {
   font-size: var(--fs-small);
   color: var(--color-text-muted);
}

.order-product__price {
   font-size: var(--fs-small);
   font-weight: var(--fw-bold);
}

/* Summary box */
.order-summary-box {
   background: var(--color-bg-alt);
   padding: var(--space-md);
   border-radius: var(--radius-md);
}

.order-summary-row {
   display: flex;
   justify-content: space-between;
   padding: var(--space-xs) 0;
   font-size: var(--fs-small);
}

.order-summary-row--total {
   margin-top: var(--space-sm);
   padding-top: var(--space-sm);
   border-top: 2px solid var(--color-border);
   font-size: 1.125rem;
   font-weight: var(--fw-bold);
}

.order-summary-points {
   display: flex;
   align-items: center;
   gap: var(--space-sm);
   margin-top: var(--space-md);
   padding-top: var(--space-md);
   border-top: 1px solid var(--color-border);
   font-size: 0.8125rem;
   color: var(--color-accent);
}

/* Address box */
.order-address-box p {
   font-size: var(--fs-small);
   line-height: 1.6;
   margin: 0;
}

/* Delivery box */
.order-delivery-box {
   display: flex;
   align-items: center;
   gap: var(--space-md);
}

.order-delivery-icon {
   width: 48px;
   height: 48px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: var(--color-bg-alt);
   border-radius: var(--radius-sm);
   font-size: 1.25rem;
}

.order-delivery-info strong {
   display: block;
   font-size: var(--fs-small);
}

.order-delivery-info span {
   font-size: 0.75rem;
   color: var(--color-text-muted);
}

/* Payment box */
.order-payment-box {
   display: flex;
   align-items: center;
   gap: var(--space-md);
}

.order-payment-icon {
   width: 48px;
   height: 48px;
   display: flex;
   align-items: center;
   justify-content: center;
   background: var(--color-bg-alt);
   border-radius: var(--radius-sm);
   font-size: 0.875rem;
   font-weight: var(--fw-bold);
}

.order-payment-info strong {
   display: block;
   font-size: var(--fs-small);
}

.order-payment-status {
   font-size: 0.75rem;
   font-weight: var(--fw-semibold);
}

.order-payment-status--paid {
   color: #4CAF50;
}

.order-payment-status--pending {
   color: #FF9800;
}

/* Actions */
.order-details__actions {
   display: flex;
   justify-content: center;
   gap: var(--space-md);
   margin-bottom: var(--space-xl);
}

/* Timeline */
.order-timeline {
   background: var(--color-bg);
   border: 1px solid var(--color-border);
   padding: var(--space-lg);
}

.timeline {
   position: relative;
   padding-left: var(--space-xl);
}

.timeline::before {
   content: '';
   position: absolute;
   left: 8px;
   top: 0;
   bottom: 0;
   width: 2px;
   background: var(--color-border);
}

.timeline-item {
   position: relative;
   padding-bottom: var(--space-lg);
}

.timeline-item:last-child {
   padding-bottom: 0;
}

.timeline-marker {
   position: absolute;
   left: calc(-1 * var(--space-xl) + 1px);
   top: 0;
   width: 16px;
   height: 16px;
   background: var(--color-bg);
   border: 2px solid var(--color-border);
   border-radius: 50%;
}

.timeline-item--completed .timeline-marker {
   background: #4CAF50;
   border-color: #4CAF50;
}

.timeline-item--completed .timeline-marker::after {
   content: '\f00c';
   font-family: 'Font Awesome 6 Free';
   font-weight: 900;
   font-size: 0.5rem;
   color: var(--color-text-inverse);
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
}

.timeline-item--active .timeline-marker {
   background: var(--color-accent);
   border-color: var(--color-accent);
   animation: pulse 2s infinite;
}

@keyframes pulse {
   0%, 100% { box-shadow: 0 0 0 0 rgba(227, 70, 54, 0.4); }
   50% { box-shadow: 0 0 0 8px rgba(227, 70, 54, 0); }
}

.timeline-content strong {
   display: block;
   font-size: var(--fs-small);
   font-weight: var(--fw-semibold);
}

.timeline-content span {
   font-size: 0.75rem;
   color: var(--color-text-muted);
}

/* Checkout footer */
.checkout-footer {
   background: var(--color-bg-alt);
   padding: var(--space-lg) 0;
   margin-top: var(--space-xl);
}

.checkout-footer .container {
   display: flex;
   justify-content: space-between;
   align-items: center;
}

.checkout-footer p {
   font-size: 0.75rem;
   color: var(--color-text-muted);
   margin: 0;
}

.checkout-footer__links {
   display: flex;
   gap: var(--space-lg);
}

.checkout-footer__links a {
   font-size: 0.75rem;
   color: var(--color-text-muted);
   text-decoration: none;
}

.checkout-footer__links a:hover {
   color: var(--color-text);
}

/* ===========================
   RESPONSIVE - TABLET
   =========================== */
@media (max-width: 1024px) {
   .checkout-layout {
      grid-template-columns: 1fr 320px;
   }

   .payment-options {
      grid-template-columns: repeat(2, 1fr);
   }
}

/* ===========================
   RESPONSIVE - MOBILE
   =========================== */
@media (max-width: 767px) {
   .checkout-header .container {
      flex-wrap: wrap;
      gap: var(--space-md);
   }

   .checkout-header__logo {
      order: 1;
   }

   .checkout-header__secure {
      order: 2;
   }

   .checkout-header__steps {
      order: 3;
      width: 100%;
      justify-content: center;
      gap: var(--space-md);
   }

   .checkout-step__label {
      display: none;
   }

   .checkout-layout {
      grid-template-columns: 1fr;
   }

   .checkout-summary {
      order: -1;
   }

   .checkout-summary__sticky {
      position: static;
   }

   .checkout-section {
      padding: var(--space-md);
   }

   .cart-item {
      grid-template-columns: 60px 1fr;
      gap: var(--space-sm);
   }

   .cart-item__image {
      width: 60px;
      height: 60px;
   }

   .cart-item__details {
      grid-column: 2;
   }

   .cart-item__qty {
      grid-column: 1 / -1;
      justify-self: start;
   }

   .cart-item__price {
      grid-column: 1 / -1;
      text-align: left;
   }

   .cart-item__remove {
      position: absolute;
      top: var(--space-sm);
      right: var(--space-sm);
   }

   .cart-item {
      position: relative;
   }

   .form-row-2 {
      grid-template-columns: 1fr;
   }

   .delivery-option__content {
      flex-wrap: wrap;
   }

   .delivery-option__info {
      flex: 1 1 calc(100% - 100px);
   }

   .delivery-option__price {
      width: 100%;
      text-align: right;
   }

   .payment-options {
      grid-template-columns: repeat(2, 1fr);
   }

   .order-confirmation__actions {
      flex-direction: column;
   }

   .order-details__grid {
      grid-template-columns: 1fr;
   }

   .order-product {
      grid-template-columns: 50px 1fr;
      gap: var(--space-sm);
   }

   .order-product__qty,
   .order-product__price {
      grid-column: 2;
   }

   .order-details__actions {
      flex-direction: column;
   }

   .checkout-footer .container {
      flex-direction: column;
      gap: var(--space-md);
      text-align: center;
   }
}

/* ===========================
   LOADING STATES
   =========================== */
.cart-item.cart-loading {
   opacity: 0.5;
   pointer-events: none;
   position: relative;
}

.cart-item.cart-loading::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   width: 24px;
   height: 24px;
   border: 3px solid var(--color-border);
   border-top-color: var(--color-text);
   border-radius: 50%;
   animation: spin 0.8s linear infinite;
}

@keyframes spin {
   to {
      transform: translate(-50%, -50%) rotate(360deg);
   }
}

.cart-item__qty button:disabled,
.cart-item__remove:disabled {
   opacity: 0.5;
   cursor: not-allowed;
}

/* Hidden payment options (filtered by delivery method) */
.payment-option--hidden {
   display: none !important;
}

/* Loading states */
.checkout-summary--loading,
.payment-options--loading {
   position: relative;
   opacity: 0.6;
   pointer-events: none;
}

.checkout-summary--loading::after,
.payment-options--loading::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   width: 32px;
   height: 32px;
   border: 3px solid var(--color-border);
   border-top-color: var(--color-text);
   border-radius: 50%;
   animation: spin 0.8s linear infinite;
   z-index: 10;
}

/* No payments message */
.payment-options__no-methods {
   text-align: center;
   padding: 2rem;
   background: #fff3cd;
   border: 1px solid #c19102;
   border-radius: 0;
   margin-top: 1rem;
}

.payment-options__no-methods i {
   font-size: 2.5rem;
   color: #ff9800;
   margin-bottom: 1rem;
}

.payment-options__no-methods p {
   margin: 0.5rem 0;
   font-size: 0.95rem;
}

.payment-options__no-methods p:first-of-type {
   font-weight: 600;
   color: #333;
}

.payment-options__no-methods .text-muted {
   color: #666;
   font-size: 0.9rem;
}

/* ====================================
   SAVED ADDRESSES (Address Cards)
   ==================================== */

/* Address cards grid */
.saved-addresses {
   display: grid;
   grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
   gap: 1rem;
   margin-bottom: 2rem;
}

/* Address card */
.address-card {
   background: #fff;
   border: 2px solid #e5e5e5;
   border-radius: 8px;
   padding: 1.5rem;
   cursor: pointer;
   transition: all 0.2s ease;
   position: relative;
   display: flex;
   flex-direction: column;
}

.address-card:hover {
   border-color: #333;
   box-shadow: 0 2px 8px rgba(0,0,0,0.1);
   transform: translateY(-2px);
}

/* Selected state */
.address-card--selected {
   border-color: #E53935;
   background: #fff5f5;
}

.address-card--selected::before {
   content: '\f00c';
   font-family: 'Font Awesome 6 Free';
   font-weight: 900;
   position: absolute;
   top: 1rem;
   right: 1rem;
   color: #E53935;
   font-size: 1.2rem;
}

/* Address card content */
.address-card__content {
   flex: 1;
}

.address-card__name {
   display: block;
   font-size: 1.1rem;
   font-weight: 600;
   margin-bottom: 0.5rem;
   color: #333;
   line-height: 1.3;
}

.address-card__company,
.address-card__vat {
   font-size: 0.9rem;
   color: #666;
   margin-bottom: 0.25rem;
   font-weight: 500;
}

.address-card__company {
   font-style: italic;
}

.address-card__vat {
   color: #444;
   font-family: monospace;
   font-size: 0.85rem;
}

.address-card__address {
   font-size: 0.95rem;
   color: #333;
   margin: 0.75rem 0;
   line-height: 1.6;
}

.address-card__phone {
   font-size: 0.9rem;
   color: #666;
   margin-top: 0.5rem;
}

.address-card__phone strong {
   color: #333;
}

/* Address card actions */
.address-card__actions {
   margin-top: 1rem;
   padding-top: 1rem;
   border-top: 1px solid #e5e5e5;
}

.address-card__edit {
   background: none;
   border: none;
   color: #E53935;
   cursor: pointer;
   font-size: 0.9rem;
   padding: 0;
   font-weight: 500;
   transition: opacity 0.2s ease;
}

.address-card__edit:hover {
   text-decoration: underline;
   opacity: 0.8;
}

.address-card__edit i {
   margin-right: 0.25rem;
}

/* Add address button */
.address-card--add {
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
   gap: 0.75rem;
   border: 2px dashed #ccc;
   background: #fafafa;
   color: #666;
   font-size: 1rem;
   font-weight: 500;
   min-height: 200px;
}

.address-card--add:hover {
   border-color: #E53935;
   color: #E53935;
   background: #fff;
   box-shadow: 0 2px 8px rgba(229, 57, 53, 0.1);
}

.address-card--add i {
   font-size: 2.5rem;
   margin-bottom: 0.5rem;
}

.address-card--add span {
   font-size: 1.05rem;
}

/* Mobile responsive */
@media (max-width: 768px) {
   .saved-addresses {
      grid-template-columns: 1fr;
   }

   .address-card {
      padding: 1.25rem;
   }

   .address-card__name {
      font-size: 1.05rem;
   }

   .address-card--add {
      min-height: 160px;
   }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
   .saved-addresses {
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
   }
}

/* ====================================
   CHECKBOXES (VAT, Shipping)
   ==================================== */

.checkout-checkbox {
   display: flex;
   align-items: center;
   gap: 0.75rem;
   cursor: pointer;
   padding: 1rem;
   background: #fff;
   border: 2px solid #e5e5e5;
   border-radius: 8px;
   transition: all 0.2s ease;
   user-select: none;
}

.checkout-checkbox:hover {
   border-color: #333;
   background: #fafafa;
}

.checkout-checkbox input[type="checkbox"] {
   width: 20px;
   height: 20px;
   cursor: pointer;
   accent-color: #E53935;
}

.checkout-checkbox__icon {
   font-size: 1.5rem;
   color: #666;
   transition: color 0.2s ease;
}

.checkout-checkbox input[type="checkbox"]:checked + .checkout-checkbox__icon {
   color: #E53935;
}

.checkout-checkbox__label {
   font-size: 1.05rem;
   font-weight: 500;
   color: #333;
   flex: 1;
}

/* Small checkbox variant (nested) */
.checkout-checkbox--small {
   padding: 0.75rem;
   border: 1px solid #e5e5e5;
   margin-top: 1rem;
}

.checkout-checkbox--small .checkout-checkbox__label {
   font-size: 0.95rem;
   font-weight: 400;
}

/* Collapsible sections */
.checkout-subsection--collapsible {
   margin-bottom: 1.5rem;
}

.checkout-subsection__collapse {
   margin-top: 1.5rem;
   padding: 1.5rem;
   background: #f9f9f9;
   border-radius: 8px;
   border: 1px solid #e5e5e5;
}

.checkout-subsection__subtitle {
   font-size: 1.1rem;
   font-weight: 600;
   color: #333;
   margin: 0 0 1.25rem 0;
   padding-bottom: 0.75rem;
   border-bottom: 2px solid #e5e5e5;
}

/* Mobile responsive */
@media (max-width: 768px) {
   .checkout-checkbox {
      padding: 0.875rem;
      gap: 0.625rem;
   }

   .checkout-checkbox__icon {
      font-size: 1.3rem;
   }

   .checkout-checkbox__label {
      font-size: 1rem;
   }

   .checkout-subsection__collapse {
      padding: 1.25rem;
   }
}

/* ===========================
   FORM VALIDATION STYLES
   =========================== */
input.is-invalid,
select.is-invalid,
textarea.is-invalid {
   border-color: #dc3545 !important;
   box-shadow: 0 0 0 0.15rem rgba(220, 53, 69, 0.15) !important;
}

input.is-invalid:focus,
select.is-invalid:focus,
textarea.is-invalid:focus {
   border-color: #dc3545 !important;
   box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25) !important;
}

/* Invalid state for radio/checkbox groups */
.delivery-options.is-invalid,
.payment-options.is-invalid {
   border: 2px solid #dc3545;
   border-radius: 8px;
   padding: 1rem;
   background: rgba(220, 53, 69, 0.05);
}

/* Invalid state for checkbox labels */
.checkout-checkbox.is-invalid {
   border-color: #dc3545 !important;
   background: rgba(220, 53, 69, 0.05) !important;
}

/* Invalid state for address cards */
.address-cards.is-invalid {
   border: 2px solid #dc3545;
   border-radius: 8px;
   padding: 1rem;
   background: rgba(220, 53, 69, 0.05);
}

/* Remove invalid state animation */
input.is-invalid,
select.is-invalid,
textarea.is-invalid,
.is-invalid {
   animation: shake 0.3s ease-in-out;
}

@keyframes shake {
   0%, 100% { transform: translateX(0); }
   25% { transform: translateX(-5px); }
   75% { transform: translateX(5px); }
}