/* ═══════════════════════════════════════════════════════════
   Modern Standard — Classic Stacked
   Two-column layout: sticky product image 40% left |
   scrollable checkout form 60% right.
   All colors/radii driven by Style Tab CSS variables.
   ═══════════════════════════════════════════════════════════ */

/* ── Hide global builder header when Modern Standard provides its own topbar ── */
#mlc-builder-app.mlc-builder-has-inline-nav .mlc-builder-header {
    display: none;
}

/* ── Full-viewport 2-col: image panel fixed, form panel scrolls ──
   dvh fallback: older browsers read 100vh; modern ones use 100dvh which
   excludes the iOS/Android browser chrome so content doesn't clip. */
.mlc-checkout-container.mlc-layout-default {
    padding-top: 0;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

/* ── Outer container: 2-column grid ── */
.mlc-layout-default .mlc-checkout-container {
    display: grid;
    grid-template-columns: var(--mlc-image-panel-width, 40%) 1fr;
    align-items: stretch;
}

/* ══════════════════════════════════════════════
   LEFT PANEL — sticky product image (40%)
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-checkout-image-panel {
    background: var(--mlc-image-panel-bg, var(--mlc-secondary-bg, #f5f5f7));
    border-right: 1px solid var(--mlc-section-border, #e8e8ed);
}

.mlc-layout-default .mlc-hero-sticky {
    display: flex;
    flex-direction: column;
    height: 100%;
    position: sticky;
    top: 0;
    max-height: 100vh;
    max-height: 100dvh;
}

/* Image fills top portion */
.mlc-layout-default .mlc-hero-image-wrapper {
    flex: 1;
    min-height: 0;
    overflow: hidden;
    position: relative;
}

.mlc-layout-default .mlc-hero-img {
    width: 100%;
    height: 100%;
    object-fit: var(--mlc-image-fit, cover);
    object-position: center;
    display: block;
    transition: transform .6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.mlc-layout-default .mlc-checkout-image-panel:hover .mlc-hero-img {
    transform: scale(1.03);
}

/* Placeholder when no product image */
.mlc-layout-default .mlc-hero-placeholder {
    width: 100%;
    height: 100%;
    background: var(--mlc-image-panel-bg, var(--mlc-secondary-bg, #f5f5f7));
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Gradient overlay — deeper for better text legibility */
.mlc-layout-default .mlc-hero-image-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 65%;
    background: linear-gradient(to top,
        rgba(0,0,0,.72) 0%,
        rgba(0,0,0,.35) 40%,
        transparent 100%);
    pointer-events: none;
}

/* Product title / desc overlay on image */
.mlc-layout-default .mlc-hero-product-info {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: clamp(20px, 3vw, 36px);
    z-index: 2;
}

.mlc-layout-default .mlc-hero-product-title {
    font-size: clamp(1.2rem, 2.2vw, 1.85rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin: 0 0 8px;
    text-shadow: 0 1px 12px rgba(0,0,0,.45);
}

.mlc-layout-default .mlc-hero-product-desc {
    font-size: clamp(0.8rem, 1.1vw, 0.9375rem);
    color: rgba(255,255,255,0.9);
    line-height: 1.55;
    margin: 0;
    text-shadow: 0 1px 6px rgba(0,0,0,.3);
}

/* ══════════════════════════════════════════════
   CHECKOUT TOPBAR — brand name + back button
   Flows with scroll content (non-sticky)
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-checkout-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 26px clamp(24px, 4vw, 52px) 18px;
    background: var(--mlc-card-bg, #fff);
    border-bottom: 1px solid var(--mlc-section-border, #e8e8ed);
}

/* Back-btn and .mlc-checkout-brand / .mlc-checkout-slogan base styles live in frontend.css.
   Only layout-specific overrides needed here. */

/* ══════════════════════════════════════════════
   PRODUCT HEADER — title + tagline in form panel
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-product-header {
    padding-bottom: clamp(16px, 2.5vw, 24px);
    border-bottom: 1px solid var(--mlc-section-border, #e8e8ed);
}

.mlc-layout-default .mlc-product-headline {
    font-size: clamp(1.35rem, 2.8vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    color: var(--mlc-card-text, #1d1d1f);
    line-height: 1.15;
    margin: 0 0 8px;
}

.mlc-layout-default .mlc-product-tagline {
    font-size: 0.9375rem;
    color: var(--mlc-label-color, #86868b);
    line-height: 1.6;
    margin: 0;
}

/* ══════════════════════════════════════════════
   RIGHT PANEL — checkout form (60%) — only this scrolls
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-checkout-form-panel {
    background: var(--mlc-card-bg, #fff);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ── Full-width scroll area — covers the entire form panel width so clicking
   anywhere in the white background area scrolls the content ── */
.mlc-layout-default .mlc-checkout-scroll-area {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* ── Vertical Stack — centered content column inside the scroll area ── */
.mlc-layout-default .mlc-checkout-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--mlc-section-margin, 16px);
    max-width: var(--mlc-checkout-max-width, 680px);
    margin: 0 auto;
    width: 100%;
    padding: clamp(28px, 4vw, 52px) clamp(24px, 4vw, 52px) 48px;
    box-sizing: border-box;
    counter-reset: checkout-step;
}

/* ── Footer — flows with scrollable content (no stickiness) ── */
.mlc-layout-default .mlc-checkout-scroll-area > .mlc-checkout-footer {
    margin: 24px 0 0;
    padding: 18px clamp(24px, 4vw, 52px) 20px;
    border-top: 1px solid var(--mlc-section-border, #e8e8ed);
    background: var(--mlc-card-bg, #fff);
}

/* ══════════════════════════════════════════════
   CONFIG SECTION CARDS
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-config-section {
    position: relative;
    background: var(--mlc-card-bg, #fff);
    border: 1.5px solid var(--mlc-section-border, #e8e8ed);
    border-radius: var(--mlc-section-radius, 18px);
    padding: clamp(20px, 3vw, 34px) clamp(20px, 3vw, 38px);
    box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.03);
    transition: border-color .25s ease, box-shadow .25s ease;
    counter-increment: checkout-step;
    margin-bottom: 0 !important;
}

/* Step number badge — top-right */
.mlc-layout-default .mlc-config-section::before {
    content: counter(checkout-step);
    position: absolute;
    top: clamp(20px, 3vw, 34px);
    right: clamp(20px, 3vw, 38px);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--mlc-section-border, #e8e8ed);
    color: var(--mlc-label-color, #86868b);
    font-size: 0.68rem;
    font-weight: 700;
    line-height: 26px;
    text-align: center;
    transition: background .25s ease, color .25s ease;
}

.mlc-layout-default .mlc-config-section.active::before {
    background: var(--mlc-primary-color, #0071e3);
    color: #fff;
}

.mlc-layout-default .mlc-config-section.active {
    border-color: var(--mlc-section-active-border, var(--mlc-primary-color, #0071e3));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--mlc-primary-color, #0071e3) 8%, transparent),
                0 8px 28px rgba(0,0,0,.07);
}

/* ── Section Headings ── */
.mlc-layout-default .mlc-section-heading {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--mlc-card-text, #1d1d1f);
    margin: 0 0 4px;
    padding-right: 36px;
    line-height: 1.3;
}

.mlc-layout-default .mlc-section-subtext {
    font-size: 0.85rem;
    color: var(--mlc-label-color, #86868b);
    margin: 0 0 18px;
    line-height: 1.55;
}

/* ══════════════════════════════════════════════
   OPTION CARDS (radio / checkbox grid)
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
}

.mlc-layout-default .mlc-option-card {
    position: relative;
    background: var(--mlc-input-bg, #f5f5f7);
    border: 1.5px solid var(--mlc-input-border, #d2d2d7);
    border-radius: calc(var(--mlc-section-radius, 18px) * 0.55);
    padding: 13px 11px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow: hidden;
    transition: border-color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
    user-select: none;
}

.mlc-layout-default .mlc-option-card:hover {
    border-color: var(--mlc-primary-color, #0071e3);
    background: var(--mlc-card-bg, #fff);
    transform: translateY(-1px);
}

.mlc-layout-default .mlc-option-card.selected {
    border-color: var(--mlc-primary-color, #0071e3);
    border-width: 2px;
    background: var(--mlc-card-bg, #fff);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
    transform: translateY(-1px);
}

/* Radio indicator — top-right */
.mlc-layout-default .mlc-selection-indicator {
    position: absolute;
    top: 9px; right: 9px;
    width: 17px; height: 17px;
    border-radius: 50%;
    border: 2px solid var(--mlc-input-border, #d2d2d7);
    background: transparent;
    transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
    flex-shrink: 0;
}

.mlc-layout-default .mlc-option-card.selected .mlc-selection-indicator {
    background: var(--mlc-primary-color, #0071e3);
    border-color: var(--mlc-primary-color, #0071e3);
    box-shadow: inset 0 0 0 3px #fff;
}

/* Option image */
.mlc-layout-default .mlc-option-image-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: calc(var(--mlc-section-radius, 18px) * 0.35);
    overflow: hidden;
    background: var(--mlc-section-border, #e8e8ed);
}

.mlc-layout-default .mlc-option-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .35s ease;
}

.mlc-layout-default .mlc-option-card:hover .mlc-option-img {
    transform: scale(1.04);
}

/* Option label + meta */
.mlc-layout-default .mlc-option-label-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--mlc-card-text, #1d1d1f);
    line-height: 1.3;
    padding-right: 20px;
}

.mlc-layout-default .mlc-option-desc-text {
    font-size: 0.755rem;
    color: var(--mlc-label-color, #86868b);
    line-height: 1.4;
}

.mlc-layout-default .mlc-option-price {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--mlc-primary-color, #0071e3);
    margin-top: 1px;
}

/* ══════════════════════════════════════════════
   DROPDOWN / TEXT INPUTS
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-section-dropdown,
.mlc-layout-default .mlc-lead-input {
    width: 100%;
    background: var(--mlc-input-bg, #f5f5f7);
    border: 1.5px solid var(--mlc-input-border, #d2d2d7);
    border-radius: var(--mlc-input-radius, 10px);
    padding: 11px 16px;
    font-size: 0.9375rem;
    color: var(--mlc-card-text, #1d1d1f);
    font-family: var(--mlc-font-family, inherit);
    box-sizing: border-box;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

.mlc-layout-default .mlc-section-dropdown:focus,
.mlc-layout-default .mlc-lead-input:focus {
    border-color: var(--mlc-primary-color, #0071e3);
    background: var(--mlc-card-bg, #fff);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.mlc-layout-default .mlc-lead-input[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

.mlc-layout-default .mlc-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* ══════════════════════════════════════════════
   RANGE SLIDER
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-range-wrapper {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.mlc-layout-default .mlc-range-display {
    background: var(--mlc-input-bg, #f5f5f7);
    border: 1.5px solid var(--mlc-section-border, #e8e8ed);
    border-radius: var(--mlc-input-radius, 10px);
    padding: 10px 16px;
    text-align: center;
}

.mlc-layout-default .mlc-range-value {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--mlc-primary-color, #0071e3);
}

.mlc-layout-default .mlc-range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--mlc-section-border, #e8e8ed);
    outline: none;
    cursor: pointer;
}

.mlc-layout-default .mlc-range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--mlc-primary-color, #0071e3);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
    transition: transform .2s ease;
}

.mlc-layout-default .mlc-range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.18);
}

.mlc-layout-default .mlc-range-slider::-moz-range-thumb {
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--mlc-primary-color, #0071e3);
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
}

.mlc-layout-default .mlc-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--mlc-label-color, #86868b);
}

/* ══════════════════════════════════════════════
   QUANTITY SELECTOR
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-global-qty-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 8px 0;
}

.mlc-layout-default .mlc-qty-btn {
    width: 44px !important;
    height: 44px !important;
    border-radius: 50% !important;
    border: 1.5px solid var(--mlc-section-border, #d2d2d7) !important;
    background: var(--mlc-card-bg, #fff) !important;
    color: var(--mlc-card-text, #1d1d1f) !important;
    font-size: 1.3rem !important;
    font-weight: 300 !important;
    line-height: 1 !important;
    cursor: pointer !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
    transition: border-color .2s ease, color .2s ease, transform .2s ease !important;
}

.mlc-layout-default .mlc-qty-btn:hover {
    border-color: var(--mlc-primary-color, #0071e3) !important;
    color: var(--mlc-primary-color, #0071e3) !important;
    transform: scale(1.1) !important;
}

.mlc-layout-default .mlc-qty-display {
    text-align: center;
    min-width: 90px;
}

.mlc-layout-default .mlc-qty-unit-label {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--mlc-card-text, #1d1d1f);
    display: block;
    letter-spacing: -0.02em;
}

.mlc-layout-default .mlc-qty-piece-label {
    font-size: 0.8rem;
    color: var(--mlc-label-color, #86868b);
    display: block;
    margin-top: 2px;
}

/* ══════════════════════════════════════════════
   CONTACT / LEAD FORM INTERNALS
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-lead-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mlc-layout-default .mlc-form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mlc-layout-default .mlc-form-group label,
.mlc-layout-default .mlc-lead-form > label,
.mlc-layout-default .mlc-shipping-toggle > label,
.mlc-layout-default .mlc-captcha-container > label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--mlc-card-text, #1d1d1f);
    letter-spacing: -0.01em;
}

/* Two-column row for side-by-side fields */
.mlc-layout-default .mlc-grid-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

/* Shipping toggle */
.mlc-layout-default .mlc-shipping-toggle {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mlc-layout-default .mlc-toggle-wrapper {
    display: flex;
    gap: 10px;
}

.mlc-layout-default .mlc-toggle-option {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    padding: 11px 16px;
    background: var(--mlc-input-bg, #f5f5f7);
    border: 1.5px solid var(--mlc-input-border, #d2d2d7);
    border-radius: var(--mlc-input-radius, 10px);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--mlc-card-text, #1d1d1f);
    transition: border-color .2s ease, background .2s ease;
    user-select: none;
}

.mlc-layout-default .mlc-toggle-option:has(input:checked) {
    border-color: var(--mlc-primary-color, #0071e3);
    background: var(--mlc-card-bg, #fff);
}

.mlc-layout-default .mlc-toggle-option input[type="radio"] {
    accent-color: var(--mlc-primary-color, #0071e3);
    width: 16px; height: 16px;
    flex-shrink: 0;
}

/* Delivery / pickup field groups */
#mlc-delivery-fields,
#mlc-pickup-fields {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Captcha */
.mlc-layout-default .mlc-captcha-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mlc-layout-default .mlc-captcha-image-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mlc-layout-default .mlc-captcha-image {
    border-radius: 8px;
    border: 1px solid var(--mlc-input-border, #d2d2d7);
    display: block;
}

.mlc-layout-default .mlc-captcha-refresh {
    width: 34px; height: 34px;
    border-radius: 50%;
    border: 1.5px solid var(--mlc-input-border, #d2d2d7);
    background: var(--mlc-input-bg, #f5f5f7);
    color: var(--mlc-card-text, #1d1d1f);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color .2s ease;
}

.mlc-layout-default .mlc-captcha-refresh:hover {
    border-color: var(--mlc-primary-color, #0071e3);
    color: var(--mlc-primary-color, #0071e3);
}

/* Field validation errors */
.mlc-layout-default .mlc-field-error {
    font-size: 0.8rem;
    color: #ff3b30;
    margin-top: 2px;
    display: none;
}

.mlc-layout-default .mlc-has-error .mlc-lead-input,
.mlc-layout-default .mlc-has-error .mlc-section-dropdown {
    border-color: #ff3b30 !important;
    box-shadow: 0 0 0 3px rgba(255, 59, 48, .09) !important;
}

/* ══════════════════════════════════════════════
   ORDER SUMMARY CARD
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-order-summary-card {
    background: var(--mlc-secondary-bg, #f5f5f7);
    border: 1.5px solid var(--mlc-section-border, #e8e8ed);
    border-radius: var(--mlc-section-radius, 18px);
    padding: clamp(20px, 3vw, 30px);
    position: relative;
    overflow: hidden;
}

/* Accent bar at top */
.mlc-layout-default .mlc-order-summary-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--mlc-primary-color, #0071e3);
    border-radius: var(--mlc-section-radius, 18px) var(--mlc-section-radius, 18px) 0 0;
}

.mlc-layout-default .mlc-summary-title {
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: .09em;
    text-transform: uppercase;
    color: var(--mlc-label-color, #86868b);
    margin-bottom: 14px;
}

.mlc-layout-default .mlc-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 9px 0;
    border-bottom: 1px solid var(--mlc-section-border, #e8e8ed);
    font-size: 0.875rem;
}

.mlc-layout-default .mlc-summary-row:last-of-type {
    border-bottom: none;
}

.mlc-layout-default .mlc-summary-label {
    color: var(--mlc-label-color, #86868b);
    font-weight: 500;
}

.mlc-layout-default .mlc-summary-value {
    color: var(--mlc-card-text, #1d1d1f) !important;
    font-weight: 600 !important;
}

.mlc-layout-default .mlc-summary-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1.5px solid var(--mlc-section-border, #d2d2d7);
    margin-top: 10px;
    padding-top: 16px;
    font-weight: 700;
    color: var(--mlc-card-text, #1d1d1f);
}

.mlc-layout-default .mlc-summary-price {
    font-size: 1.65rem !important;
    font-weight: 800 !important;
    letter-spacing: -0.03em;
    color: var(--mlc-primary-color, #0071e3) !important;
}

/* ══════════════════════════════════════════════
   DISCOUNT SECTION
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-discount-section {
    background: var(--mlc-card-bg, #fff) !important;
    border: 1.5px solid var(--mlc-section-border, #e8e8ed) !important;
    border-radius: var(--mlc-section-radius, 18px) !important;
    padding: 18px clamp(20px, 3vw, 38px) !important;
    margin-bottom: 0 !important;
}

.mlc-layout-default .mlc-discount-section label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--mlc-card-text, #1d1d1f) !important;
    margin-bottom: 8px !important;
}

/* ══════════════════════════════════════════════
   NAVIGATION BUTTONS
   ══════════════════════════════════════════════ */
.mlc-layout-default .mlc-nav-buttons {
    display: flex !important;
    flex-direction: column !important;
    gap: 12px !important;
    margin-top: 4px !important;
    align-items: stretch !important;
    /* Override frontend.css: min-height: 80px */
    min-height: 0 !important;
}

/* Submit / CTA */
.mlc-layout-default .mlc-btn-submit {
    height: 54px !important;
    width: 100% !important;
    background: var(--mlc-button-bg, #0071e3) !important;
    color: var(--mlc-button-text, #fff) !important;
    border-radius: var(--mlc-button-radius, 980px) !important;
    font-size: 1.0625rem !important;
    font-weight: 700 !important;
    letter-spacing: -0.01em !important;
    border: none !important;
    cursor: pointer !important;
    box-shadow: 0 2px 8px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06) !important;
    transition: background .25s ease,
                transform .25s cubic-bezier(0.2,0,0.2,1),
                box-shadow .25s ease !important;
}

.mlc-layout-default .mlc-btn-submit:hover:not(:disabled) {
    background: var(--mlc-button-hover, #0077ed) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 14px color-mix(in srgb, var(--mlc-button-bg, #0071e3) 30%, transparent),
                0 12px 32px rgba(0,0,0,.1) !important;
}

.mlc-layout-default .mlc-btn-submit:disabled {
    opacity: 0.45 !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
}

/* Prev / Back ghost — override global: background:#000, border-radius:50px, margin-top:15px */
.mlc-layout-default .mlc-btn-prev,
.mlc-layout-default .mlc-btn-next {
    height: 46px !important;
    width: 100% !important;
    background: transparent !important;
    border: 1.5px solid var(--mlc-section-border, #d2d2d7) !important;
    color: var(--mlc-card-text, #1d1d1f) !important;
    border-radius: var(--mlc-button-radius, 980px) !important;
    font-size: 0.9375rem !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    margin-top: 0 !important;
    transition: border-color .2s ease, color .2s ease !important;
}

.mlc-layout-default .mlc-btn-prev:hover,
.mlc-layout-default .mlc-btn-next:hover {
    border-color: var(--mlc-primary-color, #0071e3) !important;
    color: var(--mlc-primary-color, #0071e3) !important;
}

/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE SYSTEM
   xs   ≤ 480px   — small phone
   sm   481–640   — large phone / phablet
   md   641–860   — tablet portrait
   lg   861–1024  — tablet landscape / small laptop  (2-col starts)
   xl   1025–1280 — laptop / standard desktop        (default 40/60)
   2xl  1281–1536 — large desktop
   3xl  ≥ 1537    — widescreen / 4K
   landscape      — phone landscape (short viewport)
   ══════════════════════════════════════════════════════════════════ */

/* ── xs: small phone ≤ 480px ── */
@media (max-width: 480px) {
    .mlc-checkout-container.mlc-layout-default {
        height: auto !important;
        overflow: visible !important;
    }
    .mlc-layout-default .mlc-checkout-form-panel {
        height: auto !important;
        overflow-y: visible !important;
    }
    .mlc-layout-default .mlc-checkout-scroll-area {
        overflow: visible !important;
        flex: none !important;
    }
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 1fr;
    }

    .mlc-layout-default .mlc-checkout-image-panel {
        display: block !important;
        width: 100% !important;
        height: 250px !important;
        border-right: none !important;
        border-bottom: 1px solid var(--mlc-section-border, #e8e8ed) !important;
    }
    .mlc-layout-default .mlc-hero-sticky {
        position: relative !important;
        max-height: none !important;
        height: 100% !important;
    }
    .mlc-layout-default .mlc-hero-product-info {
        padding: 20px !important;
    }
    .mlc-layout-default .mlc-hero-product-title {
        font-size: 1.4rem !important;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 12px 16px;
        background: var(--mlc-card-bg, #fff);
    }

    .mlc-layout-default .mlc-product-headline {
        font-size: 1.25rem;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        padding: 16px 14px 40px;
        gap: 12px;
    }

    .mlc-layout-default .mlc-config-section {
        padding: 16px 14px !important;
        border-radius: 14px;
    }

    .mlc-layout-default .mlc-config-section::before {
        top: 14px;
        right: 14px;
        width: 22px;
        height: 22px;
        line-height: 22px;
        font-size: 0.6rem;
    }

    .mlc-layout-default .mlc-section-heading {
        font-size: 0.9rem;
        padding-right: 28px;
    }

    .mlc-layout-default .mlc-section-subtext {
        font-size: 0.8rem;
        margin-bottom: 14px;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: 1fr;
        gap: 7px;
    }

    .mlc-layout-default .mlc-grid-row {
        grid-template-columns: 1fr;
    }

    .mlc-layout-default .mlc-toggle-wrapper {
        flex-direction: column;
    }

    .mlc-layout-default .mlc-section-dropdown,
    .mlc-layout-default .mlc-lead-input {
        font-size: 1rem; /* prevent iOS auto-zoom on focus */
        padding: 10px 13px;
    }

    .mlc-layout-default .mlc-discount-section {
        padding: 14px !important;
        border-radius: 14px !important;
    }

    .mlc-layout-default .mlc-order-summary-card {
        padding: 16px 14px !important;
        border-radius: 14px;
    }

    .mlc-layout-default .mlc-summary-price {
        font-size: 1.4rem !important;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 50px !important;
        font-size: 1rem !important;
    }

    .mlc-layout-default .mlc-btn-prev,
    .mlc-layout-default .mlc-btn-next {
        height: 44px !important;
        font-size: 0.9rem !important;
    }

    .mlc-layout-default .mlc-qty-btn {
        width: 40px !important;
        height: 40px !important;
    }
}

/* ── sm: large phone 481–640px ── */
@media (min-width: 481px) and (max-width: 640px) {
    .mlc-checkout-container.mlc-layout-default {
        height: auto !important;
        overflow: visible !important;
    }
    .mlc-layout-default .mlc-checkout-form-panel {
        height: auto !important;
        overflow-y: visible !important;
    }
    .mlc-layout-default .mlc-checkout-scroll-area {
        overflow: visible !important;
        flex: none !important;
    }
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 1fr;
    }

    .mlc-layout-default .mlc-checkout-image-panel {
        display: block !important;
        width: 100% !important;
        height: 300px !important;
        border-right: none !important;
        border-bottom: 1px solid var(--mlc-section-border, #e8e8ed) !important;
    }
    .mlc-layout-default .mlc-hero-sticky {
        position: relative !important;
        max-height: none !important;
        height: 100% !important;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 12px 18px;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        padding: 20px 18px 48px;
        gap: 13px;
    }

    .mlc-layout-default .mlc-config-section {
        padding: 18px 16px !important;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .mlc-layout-default .mlc-grid-row {
        grid-template-columns: 1fr;
    }

    .mlc-layout-default .mlc-toggle-wrapper {
        flex-direction: column;
    }

    .mlc-layout-default .mlc-section-dropdown,
    .mlc-layout-default .mlc-lead-input {
        font-size: 1rem; /* prevent iOS auto-zoom */
    }

    .mlc-layout-default .mlc-discount-section {
        padding: 16px !important;
    }

    .mlc-layout-default .mlc-order-summary-card {
        padding: 18px 16px !important;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 52px !important;
    }
}

/* ── md: tablet portrait 641–860px ── */
@media (min-width: 641px) and (max-width: 860px) {
    .mlc-checkout-container.mlc-layout-default {
        height: auto !important;
        overflow: visible !important;
    }
    .mlc-layout-default .mlc-checkout-form-panel {
        height: auto !important;
        overflow-y: visible !important;
    }
    .mlc-layout-default .mlc-checkout-scroll-area {
        overflow: visible !important;
        flex: none !important;
    }
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 1fr;
    }

    .mlc-layout-default .mlc-checkout-image-panel {
        display: block !important;
        width: 100% !important;
        height: 340px !important;
        border-right: none !important;
        border-bottom: 1px solid var(--mlc-section-border, #e8e8ed) !important;
    }
    .mlc-layout-default .mlc-hero-sticky {
        position: relative !important;
        max-height: none !important;
        height: 100% !important;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 13px 24px;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        padding: 24px 24px 52px;
        max-width: 600px;
        margin: 0 auto;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 9px;
    }

    .mlc-layout-default .mlc-grid-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .mlc-layout-default .mlc-config-section {
        padding: 20px 20px !important;
    }

    .mlc-layout-default .mlc-discount-section {
        padding: 18px 20px !important;
    }

    .mlc-layout-default .mlc-order-summary-card {
        padding: 20px !important;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 52px !important;
    }
}

/* ── lg: tablet landscape / small laptop 861–1024px ── */
@media (min-width: 861px) and (max-width: 1024px) {
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 38% 62%;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        padding: 24px 24px 52px;
        max-width: 560px;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 9px;
    }

    .mlc-layout-default .mlc-config-section {
        padding: 20px 22px !important;
    }

    .mlc-layout-default .mlc-section-heading {
        font-size: 0.95rem;
    }
}

/* ── xl: laptop / standard desktop 1025–1280px ── */
@media (min-width: 1025px) and (max-width: 1280px) {
    .mlc-layout-default .mlc-checkout-vertical {
        max-width: 640px;
        padding: 36px 40px 60px;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 10px;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 22px 40px 16px;
    }

    .mlc-layout-default .mlc-config-section {
        padding: 24px 26px !important;
    }
}

/* ── 2xl: large desktop 1281–1536px ── */
@media (min-width: 1281px) and (max-width: 1536px) {
    .mlc-layout-default .mlc-checkout-vertical {
        max-width: 720px;
        padding: 48px 52px 72px;
    }

    .mlc-layout-default .mlc-section-heading {
        font-size: 1.0625rem;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
        gap: 12px;
    }
}

/* ── 3xl: widescreen 1537–1919px ── */
@media (min-width: 1537px) and (max-width: 1919px) {
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 35% 65%;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        max-width: 820px;
        padding: 56px 64px 80px;
    }

    .mlc-layout-default .mlc-section-heading {
        font-size: 1.125rem;
    }

    .mlc-layout-default .mlc-section-subtext {
        font-size: 0.9375rem;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
        gap: 14px;
    }

    .mlc-layout-default .mlc-summary-price {
        font-size: 1.9rem !important;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 58px !important;
        font-size: 1.125rem !important;
    }
}

/* ── 4xl: ultra-wide / 4K ≥ 1920px ──
   Cap image panel (≤720px) so the hero doesn't stretch into a billboard on
   4K/5K. Form column absorbs the extra width and centers its content. */
@media (min-width: 1920px) {
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: minmax(480px, 720px) 1fr;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        max-width: 880px;
        padding: 64px clamp(48px, 5vw, 96px) 96px;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 32px clamp(48px, 5vw, 96px) 22px;
    }

    .mlc-layout-default .mlc-checkout-scroll-area > .mlc-checkout-footer {
        padding: 20px clamp(48px, 5vw, 96px) 22px;
    }

    .mlc-layout-default .mlc-section-heading {
        font-size: 1.1875rem;
    }

    .mlc-layout-default .mlc-section-subtext {
        font-size: 0.9375rem;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 14px;
    }

    .mlc-layout-default .mlc-summary-price {
        font-size: 2rem !important;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 60px !important;
        font-size: 1.125rem !important;
    }
}

/* ── Landscape phone: short viewport ≤ 480px tall ──
   Page scrolls naturally, hero collapses to a compact banner. Image uses
   top-anchored object-position so product subjects (usually upper-half)
   stay visible when the 170px band crops vertically. */
@media (max-height: 480px) and (orientation: landscape) {
    .mlc-checkout-container.mlc-layout-default {
        height: auto !important;
        overflow: visible !important;
    }
    .mlc-layout-default .mlc-hero-img {
        object-position: center 25% !important;
    }
    .mlc-layout-default .mlc-checkout-form-panel {
        height: auto !important;
        overflow-y: visible !important;
    }
    .mlc-layout-default .mlc-checkout-scroll-area {
        overflow: visible !important;
        flex: none !important;
    }
    .mlc-layout-default .mlc-checkout-container {
        grid-template-columns: 1fr;
    }

    /* Show image panel in landscape — compact height */
    .mlc-layout-default .mlc-checkout-image-panel {
        display: block !important;
        width: 100% !important;
        height: 170px !important;
        border-right: none !important;
        border-bottom: 1px solid var(--mlc-section-border, #e8e8ed) !important;
    }
    .mlc-layout-default .mlc-hero-sticky {
        position: relative !important;
        max-height: none !important;
        height: 100% !important;
    }
    .mlc-layout-default .mlc-hero-product-info {
        padding: 15px 20px !important;
    }
    .mlc-layout-default .mlc-hero-product-title {
        font-size: 1.2rem !important;
    }

    .mlc-layout-default .mlc-checkout-topbar {
        padding: 8px 20px;
    }

    .mlc-layout-default .mlc-checkout-vertical {
        padding: 16px 20px 36px;
        gap: 12px;
    }

    .mlc-layout-default .mlc-config-section {
        padding: 14px 16px !important;
    }

    .mlc-layout-default .mlc-options-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .mlc-layout-default .mlc-btn-submit {
        height: 46px !important;
    }
}