/**
 * QuickCheckout for WooCommerce — Frontend Styles
 *
 * Premium, mobile-first checkout modal/drawer with modern design.
 * All classes prefixed with qcwc- to avoid conflicts.
 * Uses CSS custom properties for theming (set via inline styles from admin settings).
 *
 * @package QuickCheckout
 */

/* ============================================
   Google Font — loaded via wp_enqueue_style
   ============================================ */

/* ============================================
   CSS Custom Properties (Defaults)
   ============================================ */
:root {
    --qcwc-btn-bg: #2563eb;
    --qcwc-btn-text: #ffffff;
    --qcwc-modal-max-width: 520px;
    --qcwc-border-radius: 16px;

    /* Premium design tokens */
    --qcwc-bg: #ffffff;
    --qcwc-bg-secondary: #f8fafc;
    --qcwc-bg-tertiary: #f1f5f9;
    --qcwc-text: #0f172a;
    --qcwc-text-secondary: #475569;
    --qcwc-text-muted: #94a3b8;
    --qcwc-text-light: #cbd5e1;
    --qcwc-border: #e2e8f0;
    --qcwc-border-light: #f1f5f9;
    --qcwc-border-focus: #2563eb;
    --qcwc-success: #10b981;
    --qcwc-success-bg: #ecfdf5;
    --qcwc-success-border: #a7f3d0;
    --qcwc-error: #ef4444;
    --qcwc-error-bg: #fef2f2;
    --qcwc-warning: #f59e0b;
    --qcwc-overlay: rgba(15, 23, 42, 0.6);
    --qcwc-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --qcwc-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --qcwc-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --qcwc-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --qcwc-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --qcwc-transition-slow: 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    --qcwc-discount: #059669;
    --qcwc-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --qcwc-gradient-subtle: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
    --qcwc-gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

/* ============================================
   Screen Reader Only
   ============================================ */
.qcwc-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Buy Now Button
   ============================================ */
.qcwc-buy-now-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    margin: 10px 0;
    min-width: 180px;
    font-family: var(--qcwc-font);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.01em;
    color: var(--qcwc-btn-text);
    background: var(--qcwc-btn-bg);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--qcwc-transition);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.qcwc-buy-now-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.qcwc-buy-now-btn:hover:not(:disabled) {
    filter: brightness(1.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -5px rgba(37, 99, 235, 0.4);
}

.qcwc-buy-now-btn:active:not(:disabled) {
    transform: translateY(0);
    filter: brightness(0.95);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

.qcwc-buy-now-btn:focus-visible {
    outline: 2px solid var(--qcwc-btn-bg);
    outline-offset: 3px;
}

.qcwc-buy-now-btn.qcwc-btn--disabled,
.qcwc-buy-now-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.qcwc-btn__icon {
    display: flex;
    align-items: center;
}

/* ============================================
   Modal Overlay
   ============================================ */
.qcwc-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--qcwc-overlay);
    z-index: 999998;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--qcwc-transition-slow), visibility var(--qcwc-transition-slow);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.qcwc-modal-overlay.qcwc-active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   Modal Container
   ============================================ */
.qcwc-modal {
    position: fixed;
    z-index: 999999;
    background: var(--qcwc-bg);
    font-family: var(--qcwc-font);
    color: var(--qcwc-text);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--qcwc-transition-slow), visibility var(--qcwc-transition-slow), transform var(--qcwc-transition-slow);

    /* Desktop: centered modal */
    top: 50%;
    left: 50%;
    transform: translate(-50%, -46%) scale(0.96);
    width: 92%;
    max-width: var(--qcwc-modal-max-width);
    max-height: 90vh;
    border-radius: var(--qcwc-border-radius);
    box-shadow: var(--qcwc-shadow);
}

.qcwc-modal.qcwc-active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* ============================================
   Modal Header
   ============================================ */
.qcwc-modal__header {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px 24px 14px;
    background: var(--qcwc-gradient-subtle);
    border-bottom: 1px solid var(--qcwc-border-light);
    flex-shrink: 0;
}

.qcwc-modal__header-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.qcwc-modal__title {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
    color: var(--qcwc-text);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ============================================
   Step Indicator
   ============================================ */
.qcwc-steps {
    width: 100%;
}

.qcwc-steps__list {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 6px 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.qcwc-steps__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: 999px;
    cursor: pointer;
    transition: background var(--qcwc-transition), color var(--qcwc-transition);
    color: var(--qcwc-text-muted);
    user-select: none;
}

.qcwc-steps__item:hover {
    background: rgba(37, 99, 235, 0.06);
}

.qcwc-steps__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
    background: var(--qcwc-bg-tertiary);
    color: var(--qcwc-text-muted);
    flex-shrink: 0;
}

.qcwc-steps__label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.qcwc-steps__sep {
    color: var(--qcwc-text-light);
    font-size: 12px;
    padding: 0 2px;
    user-select: none;
}

.qcwc-steps__item--active {
    color: var(--qcwc-btn-bg);
    background: rgba(37, 99, 235, 0.08);
}

.qcwc-steps__item--active .qcwc-steps__num {
    background: var(--qcwc-btn-bg);
    color: #fff;
}

.qcwc-steps__item--done {
    color: var(--qcwc-success);
}

.qcwc-steps__item--done .qcwc-steps__num {
    background: var(--qcwc-success);
    color: #fff;
}

.qcwc-modal__title-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--qcwc-gradient);
    border-radius: 8px;
    flex-shrink: 0;
}

.qcwc-modal__title-badge svg {
    color: #fff;
}

.qcwc-modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    cursor: pointer;
    color: var(--qcwc-text-secondary);
    transition: all var(--qcwc-transition);
    backdrop-filter: blur(4px);
}

.qcwc-modal__close:hover {
    background: rgba(239, 68, 68, 0.08);
    color: var(--qcwc-error);
    transform: rotate(90deg);
}

.qcwc-modal__close:focus-visible {
    outline: 2px solid var(--qcwc-border-focus);
    outline-offset: 2px;
}

/* ============================================
   Modal Body (Scrollable)
   ============================================ */
.qcwc-modal__body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    position: relative;
    scroll-behavior: smooth;
    scroll-padding-bottom: 24px;
    scroll-padding-top: 8px;
}

/* Custom scrollbar */
.qcwc-modal__body::-webkit-scrollbar {
    width: 4px;
}

.qcwc-modal__body::-webkit-scrollbar-track {
    background: transparent;
}

.qcwc-modal__body::-webkit-scrollbar-thumb {
    background: var(--qcwc-text-light);
    border-radius: 4px;
}

/* ============================================
   Modal Footer (Sticky CTA)
   ============================================ */
.qcwc-modal__footer {
    flex-shrink: 0;
    padding: 14px 24px 16px;
    border-top: 1px solid var(--qcwc-border);
    background: var(--qcwc-bg);
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 -8px 24px -12px rgba(15, 23, 42, 0.12);
    z-index: 5;
}

.qcwc-modal__footer[aria-hidden="true"] {
    display: none;
}

.qcwc-footer__total {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.qcwc-footer__total-label {
    font-size: 13px;
    color: var(--qcwc-text-secondary);
    font-weight: 500;
}

.qcwc-footer__total-amount {
    font-size: 20px;
    font-weight: 800;
    color: var(--qcwc-text);
    letter-spacing: -0.02em;
}

.qcwc-footer__actions {
    display: flex;
    align-items: stretch;
    gap: 10px;
}

.qcwc-footer__back {
    flex: 0 0 auto;
    min-width: 88px;
    padding: 14px 14px;
}

.qcwc-footer__back[aria-hidden="true"],
.qcwc-footer__next[aria-hidden="true"],
.qcwc-footer__pay[aria-hidden="true"] {
    display: none !important;
}

.qcwc-footer__next,
.qcwc-footer__pay {
    flex: 1;
}

/* ============================================
   Sections
   ============================================ */
.qcwc-section {
    padding: 18px 24px;
    border-bottom: 1px solid var(--qcwc-border-light);
    animation: qcwc-fade-slide-in 0.4s ease-out both;
}

.qcwc-section:nth-child(1) { animation-delay: 0.05s; }
.qcwc-section:nth-child(2) { animation-delay: 0.1s; }
.qcwc-section:nth-child(3) { animation-delay: 0.15s; }
.qcwc-section:nth-child(4) { animation-delay: 0.2s; }
.qcwc-section:nth-child(5) { animation-delay: 0.25s; }
.qcwc-section:nth-child(6) { animation-delay: 0.3s; }

.qcwc-section:last-child {
    border-bottom: none;
}

.qcwc-section__title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--qcwc-text-muted);
    margin: 0 0 14px 0;
}

.qcwc-section__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.qcwc-section__heading .qcwc-section__title {
    margin-bottom: 0;
}

.qcwc-cart-summary {
    font-size: 12px;
    font-weight: 700;
    color: var(--qcwc-text);
    background: var(--qcwc-bg-tertiary);
    padding: 5px 10px;
    border-radius: 999px;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.qcwc-cart-summary:empty {
    display: none;
}

/* Step panels */
.qcwc-step-panel--details {
    scroll-margin-top: 8px;
}

#qcwc-step-review {
    scroll-margin-top: 8px;
}

#qcwc-step-details {
    scroll-margin-top: 8px;
}

#qcwc-step-payment {
    scroll-margin-top: 8px;
}

/* Review totals (step 1) */
.qcwc-review-totals {
    margin-top: 14px;
    padding: 12px 14px;
    background: var(--qcwc-bg-secondary);
    border: 1px solid var(--qcwc-border-light);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.qcwc-review-totals[aria-hidden="true"] {
    display: none;
}

.qcwc-review-totals__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--qcwc-text-secondary);
    font-weight: 500;
}

.qcwc-review-totals__row span:last-child {
    font-weight: 700;
    color: var(--qcwc-text);
}

.qcwc-review-totals__row--muted[aria-hidden="true"] {
    display: none;
}

.qcwc-review-totals__row--total {
    padding-top: 8px;
    border-top: 1px dashed var(--qcwc-border);
    font-size: 14px;
    color: var(--qcwc-text);
    font-weight: 700;
}

.qcwc-review-totals__row--total span:last-child {
    font-size: 16px;
    font-weight: 800;
}

/* Next step CTA inside product section */
.qcwc-step-next {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--qcwc-border-light);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
}

.qcwc-btn--next {
    width: 100%;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 700;
    background: var(--qcwc-bg);
    color: var(--qcwc-btn-bg);
    border: 1.5px solid var(--qcwc-btn-bg);
    border-radius: 12px;
    letter-spacing: -0.01em;
}

.qcwc-btn--next:hover {
    background: rgba(37, 99, 235, 0.06);
    transform: translateY(-1px);
    box-shadow: var(--qcwc-shadow-sm);
}

.qcwc-btn--next:active {
    transform: translateY(0);
}

.qcwc-step-next__hint {
    margin: 0;
    text-align: center;
    font-size: 12px;
    color: var(--qcwc-text-muted);
    font-weight: 500;
}

.qcwc-section--invalid .qcwc-payment__list {
    border-radius: 14px;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.25);
}

.qcwc-payment__error {
    display: none;
    margin-top: 8px;
}

.qcwc-payment__error[aria-hidden="false"],
.qcwc-section--invalid .qcwc-payment__error {
    display: block;
}

/* ============================================
   Product Summary
   ============================================ */
.qcwc-product {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.qcwc-product__image-wrap {
    flex-shrink: 0;
    width: 76px;
    height: 76px;
    border-radius: 14px;
    overflow: hidden;
    background: var(--qcwc-bg-secondary);
    border: 1px solid var(--qcwc-border);
    box-shadow: var(--qcwc-shadow-sm);
}

.qcwc-product__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.qcwc-product:hover .qcwc-product__image {
    transform: scale(1.05);
}

.qcwc-product__details {
    flex: 1;
    min-width: 0;
}

.qcwc-product__name {
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 4px 0;
    line-height: 1.35;
    color: var(--qcwc-text);
    word-wrap: break-word;
    letter-spacing: -0.01em;
}

.qcwc-product__attributes {
    font-size: 12px;
    color: var(--qcwc-text-secondary);
    margin-bottom: 6px;
}

.qcwc-product__attributes[aria-hidden="true"] {
    display: none;
}

.qcwc-product__attr-item {
    display: inline;
}

.qcwc-product__attr-item + .qcwc-product__attr-item::before {
    content: ' · ';
    color: var(--qcwc-text-muted);
}

.qcwc-product__price {
    font-size: 17px;
    font-weight: 800;
    color: var(--qcwc-text);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

/* ============================================
   Quantity Controls
   ============================================ */
.qcwc-quantity__controls {
    display: inline-flex;
    align-items: center;
    border: 1.5px solid var(--qcwc-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--qcwc-bg);
    box-shadow: var(--qcwc-shadow-sm);
}

.qcwc-quantity__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--qcwc-text-secondary);
    transition: all var(--qcwc-transition);
}

.qcwc-quantity__btn:hover {
    background: var(--qcwc-bg-secondary);
    color: var(--qcwc-btn-bg);
}

.qcwc-quantity__btn:active {
    transform: scale(0.9);
}

.qcwc-quantity__btn:focus-visible {
    outline: 2px solid var(--qcwc-border-focus);
    outline-offset: -2px;
}

.qcwc-quantity__input {
    width: 44px;
    text-align: center;
    border: none;
    border-left: 1.5px solid var(--qcwc-border);
    border-right: 1.5px solid var(--qcwc-border);
    font-size: 14px;
    font-weight: 700;
    color: var(--qcwc-text);
    background: transparent;
    padding: 0;
    height: 36px;
    -moz-appearance: textfield;
    font-family: var(--qcwc-font);
}

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

/* ============================================
   Form Fields
   ============================================ */
.qcwc-fields {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.qcwc-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.qcwc-field--row {
    flex-direction: row;
    gap: 12px;
}

.qcwc-field--row .qcwc-field {
    flex: 1;
}

.qcwc-field__label {
    font-size: 13px;
    font-weight: 600;
    color: var(--qcwc-text);
    letter-spacing: -0.01em;
}

.qcwc-field__required {
    color: var(--qcwc-error);
    margin-left: 2px;
}

.qcwc-input {
    width: 100%;
    padding: 11px 14px;
    font-size: 15px;
    font-family: var(--qcwc-font);
    color: var(--qcwc-text);
    background: var(--qcwc-bg-secondary);
    border: 1.5px solid transparent;
    border-radius: 10px;
    transition: all var(--qcwc-transition);
    outline: none;
    -webkit-appearance: none;
    box-sizing: border-box;
}

.qcwc-input::placeholder {
    color: var(--qcwc-text-muted);
    font-weight: 400;
}

.qcwc-input:focus {
    border-color: var(--qcwc-border-focus);
    background: var(--qcwc-bg);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
}

.qcwc-input--error {
    border-color: var(--qcwc-error);
    background: var(--qcwc-error-bg);
}

.qcwc-input--error:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.08);
}

.qcwc-field__error {
    font-size: 12px;
    color: var(--qcwc-error);
    display: none;
    font-weight: 500;
    line-height: 1.35;
    margin-top: 2px;
}

.qcwc-field--invalid .qcwc-field__error {
    display: block;
}

.qcwc-field--invalid .qcwc-input {
    border-color: var(--qcwc-error);
    background: var(--qcwc-error-bg);
}

/* ============================================
   Coupon
   ============================================ */
.qcwc-coupon {
    padding: 0;
}

.qcwc-section--coupon {
    padding: 14px 24px;
    background: var(--qcwc-bg-secondary);
}

.qcwc-coupon__toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 0;
    border: none;
    background: transparent;
    font-family: var(--qcwc-font);
    font-size: 13px;
    font-weight: 600;
    color: var(--qcwc-btn-bg);
    cursor: pointer;
    transition: color var(--qcwc-transition);
}

.qcwc-coupon__toggle:hover {
    color: var(--qcwc-text);
}

.qcwc-coupon__chevron {
    margin-left: auto;
    transition: transform var(--qcwc-transition);
}

.qcwc-coupon__toggle[aria-expanded="true"] .qcwc-coupon__chevron {
    transform: rotate(180deg);
}

.qcwc-coupon__form {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease, margin 0.3s ease;
    margin-top: 0;
}

.qcwc-coupon__form[aria-hidden="false"] {
    max-height: 200px;
    opacity: 1;
    margin-top: 12px;
}

.qcwc-coupon__input-group {
    display: flex;
    gap: 8px;
}

.qcwc-coupon__input-group .qcwc-input {
    flex: 1;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.qcwc-coupon__message {
    font-size: 13px;
    margin-top: 6px;
    min-height: 0;
    font-weight: 500;
}

.qcwc-coupon__message--success {
    color: var(--qcwc-success);
}

.qcwc-coupon__message--error {
    color: var(--qcwc-error);
}

.qcwc-coupon__applied {
    margin-top: 8px;
}

.qcwc-coupon__applied[aria-hidden="true"] {
    display: none;
}

.qcwc-coupon__tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--qcwc-success-bg);
    color: var(--qcwc-success);
    border: 1px solid var(--qcwc-success-border);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.qcwc-coupon__remove {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--qcwc-error);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    transition: transform var(--qcwc-transition);
}

.qcwc-coupon__remove:hover {
    transform: scale(1.2);
}

/* ============================================
   Payment Methods
   ============================================ */
.qcwc-payment__list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.qcwc-payment__option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 1.5px solid var(--qcwc-border);
    border-radius: 14px;
    cursor: pointer;
    transition: all var(--qcwc-transition);
    background: var(--qcwc-bg);
    position: relative;
}

.qcwc-payment__option:hover {
    border-color: var(--qcwc-btn-bg);
    background: rgba(37, 99, 235, 0.02);
    transform: translateY(-1px);
    box-shadow: var(--qcwc-shadow-sm);
}

.qcwc-payment__option.qcwc-payment__option--selected {
    border-color: var(--qcwc-btn-bg);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, rgba(124, 58, 237, 0.03) 100%);
    box-shadow: 0 0 0 1px var(--qcwc-btn-bg), var(--qcwc-shadow-sm);
}

.qcwc-payment__radio {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--qcwc-border);
    border-radius: 50%;
    position: relative;
    transition: all var(--qcwc-transition);
}

.qcwc-payment__option--selected .qcwc-payment__radio {
    border-color: var(--qcwc-btn-bg);
    background: var(--qcwc-btn-bg);
}

.qcwc-payment__option--selected .qcwc-payment__radio::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 7px;
    height: 7px;
    background: #fff;
    border-radius: 50%;
}

.qcwc-payment__info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.qcwc-payment__label {
    font-size: 14px;
    font-weight: 600;
    color: var(--qcwc-text);
}

.qcwc-payment__sublabel {
    font-size: 12px;
    color: var(--qcwc-text-muted);
    font-weight: 400;
}

.qcwc-payment__icon-wrap {
    display: flex;
    align-items: center;
}

.qcwc-payment__icon-wrap img {
    max-height: 24px;
    width: auto;
}

.qcwc-payment__type-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    flex-shrink: 0;
}

.qcwc-payment__type-icon--cod {
    background: #fef3c7;
    color: #d97706;
}

.qcwc-payment__type-icon--online {
    background: #ede9fe;
    color: #7c3aed;
}

/* Hidden actual radio input */
.qcwc-payment__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* ============================================
   COD Info
   ============================================ */
.qcwc-cod-info {
    margin-top: 12px;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease;
}

.qcwc-cod-info[aria-hidden="false"] {
    max-height: 120px;
    opacity: 1;
}

.qcwc-cod-info__content {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
    border-radius: 12px;
    border: 1px solid #dbeafe;
}

.qcwc-cod-info__icon {
    flex-shrink: 0;
    font-size: 16px;
    line-height: 1.4;
}

.qcwc-cod-info__text {
    font-size: 13px;
    color: #1e40af;
    line-height: 1.5;
    font-weight: 500;
}

/* ============================================
   Order Summary
   ============================================ */
.qcwc-section--summary {
    background: var(--qcwc-bg-secondary);
    padding-bottom: 28px;
}

.qcwc-summary__rows {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.qcwc-summary__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.qcwc-summary__row[aria-hidden="true"] {
    display: none;
}

.qcwc-summary__label {
    font-size: 14px;
    color: var(--qcwc-text-secondary);
    font-weight: 400;
}

.qcwc-summary__value {
    font-size: 14px;
    font-weight: 600;
    color: var(--qcwc-text);
}

.qcwc-summary__value--discount {
    color: var(--qcwc-discount);
}

.qcwc-summary__divider {
    height: 1px;
    background: var(--qcwc-border);
    margin: 6px 0;
}

.qcwc-summary__row--total {
    padding: 12px 16px;
    background: var(--qcwc-bg);
    border-radius: 12px;
    border: 1.5px solid var(--qcwc-border);
    margin-top: 4px;
}

.qcwc-summary__row--total .qcwc-summary__label {
    font-weight: 700;
    color: var(--qcwc-text);
    font-size: 15px;
}

.qcwc-summary__value--total {
    font-size: 20px;
    font-weight: 800;
    color: var(--qcwc-text);
    letter-spacing: -0.02em;
}

.qcwc-summary__row--remaining {
    padding-top: 4px;
}

.qcwc-summary__value--remaining {
    color: var(--qcwc-text-secondary);
    font-weight: 500;
}

.qcwc-summary__fee-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 0;
}

.qcwc-summary__fee-label {
    font-size: 13px;
    color: var(--qcwc-text-secondary);
}

.qcwc-summary__fee-value {
    font-size: 13px;
    font-weight: 600;
}

.qcwc-summary__fee-value--negative {
    color: var(--qcwc-discount);
}

/* ============================================
   Buttons
   ============================================ */
.qcwc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: var(--qcwc-font);
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--qcwc-transition);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.qcwc-btn--primary {
    background: var(--qcwc-btn-bg);
    color: var(--qcwc-btn-text);
}

.qcwc-btn--primary:hover:not(:disabled) {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.qcwc-btn--ghost {
    background: transparent;
    color: var(--qcwc-text-secondary);
    border: 1.5px solid var(--qcwc-border);
}

.qcwc-btn--ghost:hover {
    background: var(--qcwc-bg-secondary);
    color: var(--qcwc-text);
    border-color: var(--qcwc-text-muted);
}

.qcwc-btn--small {
    padding: 9px 18px;
    font-size: 13px;
    font-weight: 700;
    background: var(--qcwc-btn-bg);
    color: var(--qcwc-btn-text);
    border-radius: 10px;
    white-space: nowrap;
}

.qcwc-btn--small:hover:not(:disabled) {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.qcwc-btn--cta {
    width: 100%;
    padding: 15px 24px;
    font-size: 15px;
    font-weight: 700;
    background: var(--qcwc-gradient);
    color: #ffffff;
    border-radius: 14px;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
    border: none;
}

.qcwc-btn--cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 50%);
    pointer-events: none;
}

.qcwc-btn--cta:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -5px rgba(37, 99, 235, 0.4), 0 4px 10px -3px rgba(124, 58, 237, 0.2);
}

.qcwc-btn--cta:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

.qcwc-btn--cta:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.qcwc-btn--full {
    width: 100%;
}

.qcwc-btn:focus-visible {
    outline: 2px solid var(--qcwc-btn-bg);
    outline-offset: 3px;
}

/* Button spinner */
.qcwc-btn__spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: qcwc-spin 0.6s linear infinite;
}

.qcwc-btn--loading .qcwc-btn__spinner {
    display: block;
}

.qcwc-btn--loading #qcwc-cta-text {
    opacity: 0.7;
}

/* ============================================
   Loading State
   ============================================ */
.qcwc-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
    gap: 18px;
}

.qcwc-loading[aria-hidden="true"] {
    display: none;
}

.qcwc-loading__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--qcwc-border);
    border-top-color: var(--qcwc-btn-bg);
    border-radius: 50%;
    animation: qcwc-spin 0.7s linear infinite;
}

.qcwc-loading__text {
    font-size: 14px;
    color: var(--qcwc-text-muted);
    margin: 0;
    font-weight: 500;
}

/* ============================================
   Error Display
   ============================================ */
.qcwc-error {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    padding: 0 24px;
    transition: all 0.3s ease;
}

.qcwc-error[aria-hidden="true"] {
    display: none;
}

.qcwc-error__content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--qcwc-error-bg);
    border: 1px solid #fecaca;
    border-radius: 12px;
    margin-bottom: 12px;
    animation: qcwc-shake 0.4s ease;
}

.qcwc-error__icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--qcwc-error);
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 800;
}

.qcwc-error__message {
    flex: 1;
    font-size: 13px;
    color: #991b1b;
    line-height: 1.4;
    font-weight: 500;
}

.qcwc-error__dismiss {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: none;
    background: transparent;
    color: #991b1b;
    cursor: pointer;
    font-size: 18px;
    border-radius: 6px;
    transition: all var(--qcwc-transition);
}

.qcwc-error__dismiss:hover {
    background: rgba(153, 27, 27, 0.1);
}

/* ============================================
   Success Screen
   ============================================ */
.qcwc-success {
    padding: 40px 24px;
    text-align: center;
}

.qcwc-success[aria-hidden="true"] {
    display: none;
}

.qcwc-success__inner {
    max-width: 360px;
    margin: 0 auto;
    animation: qcwc-fade-slide-in 0.5s ease-out;
}

.qcwc-success__icon {
    margin-bottom: 24px;
}

.qcwc-success__checkmark {
    display: inline-block;
    filter: drop-shadow(0 4px 12px rgba(16, 185, 129, 0.3));
}

/* Checkmark animation */
.qcwc-success__circle {
    stroke-dasharray: 190;
    stroke-dashoffset: 190;
    animation: qcwc-circle 0.6s ease-out forwards;
}

.qcwc-success__check {
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: qcwc-check 0.4s 0.4s ease-out forwards;
}

@keyframes qcwc-circle {
    to { stroke-dashoffset: 0; }
}

@keyframes qcwc-check {
    to { stroke-dashoffset: 0; }
}

.qcwc-success__title {
    font-size: 24px;
    font-weight: 800;
    background: var(--qcwc-gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 8px 0;
    letter-spacing: -0.02em;
}

.qcwc-success__greeting {
    font-size: 15px;
    color: var(--qcwc-text-secondary);
    margin: 0 0 20px 0;
    font-weight: 400;
}

.qcwc-success__order-number {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: var(--qcwc-bg-secondary);
    border: 1px solid var(--qcwc-border);
    border-radius: 12px;
    margin-bottom: 24px;
}

.qcwc-success__label {
    font-size: 13px;
    color: var(--qcwc-text-muted);
    font-weight: 500;
}

.qcwc-success__value {
    font-size: 16px;
    font-weight: 800;
    color: var(--qcwc-text);
    letter-spacing: -0.01em;
}

.qcwc-success__payment {
    text-align: left;
    padding: 16px 18px;
    background: var(--qcwc-bg-secondary);
    border: 1px solid var(--qcwc-border);
    border-radius: 14px;
    margin-bottom: 24px;
}

.qcwc-success__payment-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 14px;
}

.qcwc-success__payment-label {
    color: var(--qcwc-text-secondary);
    font-weight: 400;
}

.qcwc-success__payment-value {
    font-weight: 700;
    color: var(--qcwc-text);
}

.qcwc-success__message {
    font-size: 14px;
    color: var(--qcwc-text-muted);
    margin: 0 0 24px 0;
    line-height: 1.5;
}

/* ============================================
   Close Confirmation Dialog
   ============================================ */
.qcwc-close-confirm {
    position: absolute;
    inset: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--qcwc-transition-slow);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.qcwc-close-confirm[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.qcwc-close-confirm__content {
    text-align: center;
    padding: 32px;
    animation: qcwc-fade-slide-in 0.3s ease-out;
}

.qcwc-close-confirm__text {
    font-size: 17px;
    font-weight: 700;
    color: var(--qcwc-text);
    margin: 0 0 24px 0;
    letter-spacing: -0.02em;
}

.qcwc-close-confirm__actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes qcwc-spin {
    to { transform: rotate(360deg); }
}

@keyframes qcwc-slide-up {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes qcwc-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes qcwc-fade-slide-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes qcwc-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(4px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(2px); }
}

/* ============================================
   Mobile Styles (<768px)
   ============================================ */
@media (max-width: 767px) {
    .qcwc-modal {
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        transform: translateY(100%);
        width: 100%;
        max-width: 100%;
        max-height: 95vh;
        border-radius: 20px 20px 0 0;
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
    }

    .qcwc-modal.qcwc-active {
        transform: translateY(0);
    }

    .qcwc-modal__header {
        padding: 14px 18px 12px;
        position: relative;
    }

    /* Mobile drag handle */
    .qcwc-modal__header::before {
        content: '';
        position: absolute;
        top: 6px;
        left: 50%;
        transform: translateX(-50%);
        width: 36px;
        height: 4px;
        background: var(--qcwc-text-light);
        border-radius: 2px;
    }

    .qcwc-modal__header-main {
        padding-top: 8px;
    }

    .qcwc-steps__label {
        font-size: 10px;
    }

    .qcwc-steps__sep {
        font-size: 10px;
    }

    .qcwc-section {
        padding: 16px 18px;
    }

    .qcwc-modal__footer {
        padding: 12px 18px;
        padding-bottom: max(12px, env(safe-area-inset-bottom));
    }

    .qcwc-footer__back {
        min-width: 72px;
        padding: 14px 10px;
        font-size: 13px;
    }

    .qcwc-input {
        font-size: 16px; /* Prevents iOS zoom on focus */
        padding: 13px 14px;
    }

    .qcwc-btn--cta,
    .qcwc-btn--next {
        padding: 15px 20px;
        font-size: 15px;
        border-radius: 14px;
    }

    .qcwc-section--coupon {
        padding: 14px 18px;
    }

    .qcwc-products-list__scroll {
        max-height: 200px;
    }

    /* Full-screen on very small screens */
    @media (max-height: 600px) {
        .qcwc-modal {
            max-height: 100vh;
            border-radius: 0;
        }

        .qcwc-products-list__scroll {
            max-height: 160px;
        }
    }
}

/* ============================================
   Tablet Styles (768px - 1024px)
   ============================================ */
@media (min-width: 768px) and (max-width: 1024px) {
    .qcwc-modal {
        max-width: min(var(--qcwc-modal-max-width), 90vw);
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .qcwc-modal,
    .qcwc-modal-overlay,
    .qcwc-loading__spinner,
    .qcwc-btn__spinner,
    .qcwc-success__circle,
    .qcwc-success__check,
    .qcwc-section {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Multi-Product List (Cart Checkout)
   ============================================ */
.qcwc-products-list {
    padding: 0;
}
.qcwc-products-list[aria-hidden="true"] { display: none; }

.qcwc-products-list__scroll {
    max-height: 240px;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--qcwc-border-light);
    border-radius: 12px;
    background: var(--qcwc-bg);
    padding: 4px 10px;
    scroll-behavior: smooth;
}

.qcwc-products-list__scroll::-webkit-scrollbar {
    width: 4px;
}

.qcwc-products-list__scroll::-webkit-scrollbar-thumb {
    background: var(--qcwc-text-light);
    border-radius: 4px;
}

.qcwc-products-list__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0 10px;
    border-bottom: 1px solid var(--qcwc-border-light);
    margin-bottom: 8px;
}
.qcwc-products-list__title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--qcwc-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.qcwc-pli {
    display: flex;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--qcwc-border-light);
    align-items: center;
    min-height: 0;
}
.qcwc-pli:last-child { border-bottom: none; }

.qcwc-pli__image {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--qcwc-bg-secondary);
    border: 1px solid var(--qcwc-border-light);
}
.qcwc-pli__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.qcwc-pli__info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.qcwc-pli__name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--qcwc-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}
.qcwc-pli__attrs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}
.qcwc-pli__attr {
    font-size: 0.68rem;
    color: var(--qcwc-text-muted);
    background: var(--qcwc-bg-tertiary);
    padding: 0 5px;
    border-radius: 4px;
    line-height: 1.5;
}
.qcwc-pli__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 1px;
}
.qcwc-pli__qty {
    font-size: 0.72rem;
    color: var(--qcwc-text-muted);
    font-weight: 500;
}
.qcwc-pli__price {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--qcwc-text);
}
.qcwc-pli__price del {
    color: var(--qcwc-text-muted);
    font-weight: 400;
    font-size: 0.7rem;
}
.qcwc-pli__price ins {
    text-decoration: none;
    color: var(--qcwc-text);
}