.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(13, 11, 10, .65);
    backdrop-filter: blur(6px);
    z-index: var(--z-modal);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s var(--ease);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.modal-backdrop.open {
    opacity: 1;
    pointer-events: all;
}

/* Modal Sheet */
.checkout-modal {
    background: var(--ivory);
    width: 100%;
    max-width: 600px;
    max-height: 95svh;
    max-height: 95vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform .4s var(--ease);
    overflow: hidden;
}

.modal-backdrop.open .checkout-modal {
    transform: translateY(0);
}

/* Handle */
.modal-handle {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    padding: 12px 0 0;
}

.modal-handle::before {
    content: '';
    width: 40px;
    height: 4px;
    background: var(--sand-dk);
    border-radius: 4px;
}

/* Modal Header */
.modal-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px 16px;
    border-bottom: 1px solid rgba(13, 11, 10, .07);
}

.modal-header h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-back {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    font-weight: 600;
    color: var(--rose);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: background var(--t-fast);
}

.modal-back:hover {
    background: rgba(200, 133, 106, .08);
}

.modal-back i {
    font-size: .9rem;
}

/* Steps indicator */
.checkout-steps {
    display: flex;
    gap: 0;
    padding: 0 24px;
    border-bottom: 1px solid rgba(13, 11, 10, .07);
    flex-shrink: 0;
    background: var(--ivory);
}

.step-tab {
    flex: 1;
    padding: 12px 8px;
    text-align: center;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink-30);
    border-bottom: 2px solid transparent;
    transition: var(--t-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: default;
}

.step-tab.active {
    color: var(--rose);
    border-color: var(--rose);
}

.step-tab.done {
    color: var(--emerald);
    border-color: var(--emerald);
}

.step-tab i {
    font-size: .85rem;
}

/* Scrollable body */
.modal-body {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

/* Step panels */
.step-panel {
    display: none;
}

.step-panel.active {
    display: flex;
    flex-direction: column;
    gap: 28px;
    animation: fadeUp .25s var(--ease-out);
}

/* ── Order Summary ── */
.order-summary-title {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-60);
    margin-bottom: 12px;
}

.order-summary-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.osi {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 10px;
    background: rgba(13, 11, 10, .03);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(13, 11, 10, .05);
}

.osi-img {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-xs);
    background: var(--parchment);
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    border: 1px solid rgba(13, 11, 10, .06);
}

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

.osi-info {
    flex: 1;
    min-width: 0;
}

.osi-name {
    font-size: .82rem;
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.osi-qty-price {
    font-size: .75rem;
    color: var(--ink-60);
    margin-top: 2px;
}

.osi-total {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.order-totals {
    background: rgba(13, 11, 10, .03);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid rgba(13, 11, 10, .06);
}

.order-total-row {
    display: flex;
    justify-content: space-between;
    font-size: .82rem;
    color: var(--ink-60);
}

.order-total-row.total {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    padding-top: 8px;
    border-top: 1px solid rgba(13, 11, 10, .08);
    margin-top: 2px;
}

.order-total-row.total span:last-child {
    font-family: var(--font-serif);
    font-size: 1.2rem;
}

.order-total-row .discount {
    color: var(--emerald);
    font-weight: 600;
}

.order-total-row .surcharge {
    color: var(--rose);
    font-weight: 600;
}

/* ── Payment options ── */
.payment-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.payment-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 2px solid rgba(13, 11, 10, .1);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--t-fast);
    background: #fff;
    text-align: left;
    width: 100%;
}

.payment-option:hover {
    border-color: var(--rose-lt);
}

.payment-option.selected {
    border-color: var(--rose);
    background: rgba(200, 133, 106, .05);
}

.payment-option-radio {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(13, 11, 10, .2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color var(--t-fast);
}

.payment-option.selected .payment-option-radio {
    border-color: var(--rose);
}

.payment-option-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--rose);
    border-radius: 50%;
    transform: scale(0);
    transition: transform .2s var(--ease-spring);
}

.payment-option.selected .payment-option-radio::after {
    transform: scale(1);
}

.payment-option-icon {
    width: 42px;
    height: 42px;
    background: var(--sand);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.payment-option.selected .payment-option-icon {
    background: rgba(200, 133, 106, .12);
}

.payment-option-info {
    flex: 1;
}

.payment-option-name {
    font-size: .88rem;
    font-weight: 700;
    color: var(--ink);
}

.payment-option-desc {
    font-size: .74rem;
    color: var(--ink-60);
    margin-top: 2px;
}

.payment-option-badge {
    font-size: .64rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    background: var(--emerald);
    color: #fff;
    flex-shrink: 0;
}

.payment-option-badge.warn {
    background: var(--rose);
}

/* Installments selector */
.installments-wrap {
    display: none;
    padding: 14px 16px;
    background: rgba(200, 133, 106, .05);
    border: 1.5px solid var(--rose-lt);
    border-radius: var(--radius-md);
    animation: fadeUp .2s var(--ease-out);
}

.installments-wrap.show {
    display: block;
}

.installments-wrap label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--ink-60);
    display: block;
    margin-bottom: 8px;
}

.installments-select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid rgba(13, 11, 10, .12);
    border-radius: var(--radius-sm);
    font-size: .85rem;
    font-weight: 600;
    color: var(--ink);
    background: #fff;
    appearance: none;
    cursor: pointer;
    transition: border-color var(--t-fast);
}

.installments-select:focus {
    border-color: var(--rose);
    outline: none;
}

.surcharge-note {
    margin-top: 8px;
    font-size: .73rem;
    color: var(--rose);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ── Delivery options ── */
.delivery-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.delivery-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 2px solid rgba(13, 11, 10, .1);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--t-fast);
    background: #fff;
    width: 100%;
    text-align: left;
}

.delivery-option:hover {
    border-color: var(--rose-lt);
}

.delivery-option.selected {
    border-color: var(--rose);
    background: rgba(200, 133, 106, .05);
}

.delivery-option-radio {
    /* same as payment-option-radio */
    width: 20px;
    height: 20px;
    border: 2px solid rgba(13, 11, 10, .2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color var(--t-fast);
}

.delivery-option.selected .delivery-option-radio {
    border-color: var(--rose);
}

.delivery-option-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--rose);
    border-radius: 50%;
    transform: scale(0);
    transition: transform .2s var(--ease-spring);
}

.delivery-option.selected .delivery-option-radio::after {
    transform: scale(1);
}

.delivery-option-icon {
    width: 42px;
    height: 42px;
    background: var(--sand);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.delivery-option.selected .delivery-option-icon {
    background: rgba(200, 133, 106, .12);
}

.delivery-option-name {
    font-size: .88rem;
    font-weight: 700;
    color: var(--ink);
}

.delivery-option-desc {
    font-size: .74rem;
    color: var(--ink-60);
    margin-top: 2px;
}

/* ── Address form ── */
.address-form {
    display: none;
    flex-direction: column;
    gap: 14px;
    animation: fadeUp .2s var(--ease-out);
}

.address-form.show {
    display: flex;
}

.form-section-title {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ink-60);
    margin-bottom: -6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-section-title i {
    color: var(--rose);
}

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

.form-group label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--ink-60);
    letter-spacing: .02em;
}

.form-group label .required {
    color: var(--rose);
    margin-left: 2px;
}

.form-input,
.form-select {
    padding: 12px 14px;
    border: 1.5px solid rgba(13, 11, 10, .12);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-family: var(--font-sans);
    color: var(--ink);
    background: #fff;
    width: 100%;
    transition: border-color var(--t-fast), box-shadow var(--t-fast);
    -webkit-appearance: none;
}

.form-input::placeholder {
    color: var(--ink-30);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--rose);
    box-shadow: 0 0 0 3px rgba(200, 133, 106, .12);
}

.form-input.error {
    border-color: var(--error);
}

.form-error {
    font-size: .72rem;
    color: var(--error);
    display: none;
}

.form-error.show {
    display: block;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row .form-group-full {
    grid-column: 1 / -1;
}

/* CEP lookup */
.cep-wrap {
    position: relative;
}

.cep-spinner {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border: 2px solid var(--sand-dk);
    border-top-color: var(--rose);
    border-radius: 50%;
    animation: spin .7s linear infinite;
    display: none;
}

.cep-spinner.loading {
    display: block;
}

/* ── Customer info ── */
.customer-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ── Footer actions ── */
.modal-footer {
    flex-shrink: 0;
    padding: 16px 24px 24px;
    border-top: 1px solid rgba(13, 11, 10, .07);
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--ivory);
}

.modal-nav {
    display: flex;
    gap: 10px;
}

.modal-nav .btn {
    flex: 1;
}

/* Confirmation step */
.confirm-step {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
}

.confirm-icon {
    width: 80px;
    height: 80px;
    background: var(--wpp);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 8px 32px rgba(37, 211, 102, .3);
    animation: pulse 2s infinite;
}

.confirm-step h4 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
}

.confirm-step p {
    font-size: .88rem;
    color: var(--ink-60);
    max-width: 280px;
    line-height: 1.6;
}

.confirm-msg-preview {
    width: 100%;
    background: #e5ffc9;
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: left;
    font-size: .78rem;
    line-height: 1.7;
    color: var(--ink);
    border: 1px solid rgba(37, 211, 102, .2);
    white-space: pre-line;
    max-height: 180px;
    overflow-y: auto;
    font-family: monospace;
}

/* Desktop: center sheet */
@media (min-width: 640px) {
    .modal-backdrop {
        align-items: center;
    }

    .checkout-modal {
        border-radius: var(--radius-lg);
        max-height: 90vh;
    }

    .modal-handle {
        display: none;
    }
}