:root {
    --checkout-brand: #10b3a3;
    --checkout-brand-strong: #0d8f83;
    --checkout-ink: #17313b;
    --checkout-muted: #637381;
    --checkout-line: #dbe4ea;
    --checkout-bg: #f4f7f8;
    --checkout-card: #ffffff;
}

body.checkout-shell {
    margin: 0;
    color: var(--checkout-ink);
    background: linear-gradient(180deg, #f7fafb 0%, #eef4f5 100%);
    font-family: "Segoe UI", Arial, sans-serif;
}

.checkout-header__brandline {
    height: 6px;
    background: linear-gradient(90deg, var(--checkout-brand) 0%, var(--checkout-brand-strong) 100%);
}

.checkout-header {
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid rgba(23, 49, 59, 0.08);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
}

.checkout-header__topbar {
    border-bottom: 1px solid rgba(23, 49, 59, 0.06);
    background: rgba(var(--brand-primary-rgb), 0.04);
}

.checkout-header__topbar-inner {
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
}

.checkout-header__topbar-user {
    display: flex;
    align-items: center;
    gap: 18px;
}

.checkout-header__topbar-link {
    border: 0;
    background: transparent;
    padding: 0;
    color: var(--checkout-ink);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
}

button.checkout-header__topbar-link {
    cursor: pointer;
}

.checkout-header__topbar-link--primary {
    color: var(--checkout-brand-strong);
}

.checkout-header__inner {
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.checkout-header__logo img {
    height: 48px;
    max-height: 48px;
    width: auto;
}

.checkout-header__logo,
.checkout-header__logo span {
    display: inline-flex;
    align-items: center;
    color: var(--checkout-ink);
    font-weight: 700;
    text-decoration: none;
}

.checkout-header__nav {
    flex: 1 1 auto;
    justify-content: center;
}

.checkout-header__menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 28px;
    margin: 0;
    padding: 0;
}

.checkout-header__menu a {
    color: var(--checkout-ink);
    text-decoration: none;
    font-weight: 500;
}

.checkout-header__menu .is-active a,
.checkout-header__menu a:hover {
    color: var(--checkout-brand-strong);
}

.checkout-header__cart {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 999px;
    background: rgba(var(--brand-primary-rgb), 0.08);
    color: var(--checkout-brand-strong);
    text-decoration: none;
    font-weight: 600;
}

.checkout-header__cart strong {
    min-width: 24px;
    height: 24px;
    padding: 0 6px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--checkout-brand);
    color: #fff;
    font-size: 12px;
}

.checkout-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.checkout-page {
    min-height: calc(100vh - 94px);
}

.checkout-container {
    max-width: 1240px;
}

.checkout-heading__title {
    margin: 0 0 12px;
    font-size: 40px;
    line-height: 1.1;
    font-weight: 700;
}

.checkout-heading__text {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 16px;
}

.checkout-card,
.checkout-sidebar,
.checkout-state-panel,
.checkout-empty {
    background: var(--checkout-card);
    border: 1px solid rgba(23, 49, 59, 0.08);
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(23, 49, 59, 0.08);
}

.checkout-card,
.checkout-sidebar {
    padding: 28px;
}

.checkout-form {
    display: grid;
    gap: 28px;
}

.checkout-form__section {
    display: grid;
    gap: 20px;
}

.checkout-form__heading h2,
.checkout-summary__head h3 {
    margin: 0 0 8px;
    font-size: 24px;
    font-weight: 700;
}

.checkout-form__heading p {
    margin: 0;
    color: var(--checkout-muted);
}

.checkout-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
}

.checkout-input {
    width: 100%;
    min-height: 52px;
    padding: 12px 16px;
    border: 1px solid var(--checkout-line);
    border-radius: 8px;
    background: #fff;
}

.checkout-input:focus {
    border-color: rgba(var(--brand-primary-rgb), 0.8);
    outline: none;
    box-shadow: 0 0 0 4px rgba(var(--brand-primary-rgb), 0.12);
}

.checkout-billing-switch {
    display: inline-flex;
    gap: 8px;
    padding: 6px;
    border-radius: 999px;
    background: #edf3f4;
}

.checkout-billing-switch button {
    border: 0;
    background: transparent;
    color: var(--checkout-muted);
    border-radius: 999px;
    padding: 10px 16px;
    font-weight: 600;
}

.checkout-billing-switch button.is-active {
    background: #fff;
    color: var(--checkout-brand-strong);
    box-shadow: 0 6px 14px rgba(23, 49, 59, 0.08);
}

.checkout-state {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 20px;
    border-radius: 10px;
    background: rgba(var(--brand-primary-rgb), 0.08);
}

.checkout-account-callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border: 1px solid rgba(23, 49, 59, 0.08);
    border-radius: 10px;
    background: #f8fbfb;
}

.checkout-account-callout strong {
    display: block;
    margin-bottom: 4px;
}

.checkout-account-callout p {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 14px;
}

.checkout-state h3 {
    margin: 0 0 6px;
    font-size: 18px;
    font-weight: 700;
}

.checkout-state p {
    margin: 0;
    color: var(--checkout-muted);
}

.checkout-billing-profiles {
    display: grid;
    gap: 14px;
    transition: opacity .2s ease;
}

.checkout-billing-profiles.is-muted {
    opacity: 0.45;
}

.checkout-billing-card {
    display: block;
    cursor: pointer;
}

.checkout-billing-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkout-billing-card__body {
    display: grid;
    gap: 8px;
    padding: 18px 20px;
    border: 1px solid rgba(23, 49, 59, 0.1);
    border-radius: 10px;
    background: #fff;
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.checkout-billing-card input:checked + .checkout-billing-card__body {
    border-color: rgba(16, 179, 163, 0.55);
    box-shadow: 0 16px 30px rgba(16, 179, 163, 0.14);
    transform: translateY(-1px);
}

.checkout-billing-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.checkout-billing-card__top strong {
    font-size: 16px;
}

.checkout-billing-card__top em {
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(16, 179, 163, 0.1);
    color: var(--checkout-brand-strong);
    font-style: normal;
    font-size: 12px;
    font-weight: 700;
}

.checkout-billing-card__meta,
.checkout-billing-card__address {
    color: var(--checkout-muted);
    font-size: 14px;
    line-height: 1.5;
}

.checkout-billing-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.checkout-new-profile {
    margin-top: 24px;
}

.checkout-billing-summary {
    display: grid;
    gap: 22px;
}

.checkout-billing-summary__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.checkout-billing-summary__item {
    padding: 18px;
    border: 1px solid rgba(23, 49, 59, 0.08);
    border-radius: 12px;
    background: #f8fbfb;
}

.checkout-billing-summary__item span {
    display: block;
    margin-bottom: 6px;
    color: var(--checkout-muted);
    font-size: 13px;
}

.checkout-billing-summary__item strong {
    display: block;
    font-size: 16px;
    line-height: 1.45;
}

.checkout-billing-summary__item--wide {
    grid-column: 1 / -1;
}

.checkout-billing-summary__note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border-radius: 12px;
    background: rgba(16, 179, 163, 0.08);
}

.checkout-billing-summary__note p {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 14px;
}

.checkout-summary {
    display: grid;
    gap: 20px;
}

.checkout-summary__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.checkout-summary__head a {
    color: var(--checkout-brand-strong);
    font-weight: 700;
    text-decoration: none;
}

.checkout-summary__items {
    display: grid;
    gap: 16px;
}

.checkout-summary__item {
    display: grid;
    grid-template-columns: 80px minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(23, 49, 59, 0.08);
}

.checkout-summary__media img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
}

.checkout-summary__content h4 {
    margin: 0 0 6px;
    font-size: 16px;
    line-height: 1.35;
    font-weight: 600;
}

.checkout-summary__content p {
    margin: 0;
    color: var(--checkout-brand-strong);
    font-weight: 700;
}

.checkout-summary__total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 8px;
    font-size: 18px;
}

.checkout-summary__total strong {
    font-size: 24px;
    font-weight: 700;
}

.checkout-summary__contracts {
    display: grid;
    gap: 12px;
}

.checkout-check {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: var(--checkout-muted);
    font-size: 14px;
}

.checkout-check a {
    color: var(--checkout-brand-strong);
    font-weight: 700;
    text-decoration: none;
}

.checkout-btn {
    min-height: 54px;
    border: 0;
    border-radius: 8px;
    padding: 14px 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}

.checkout-btn:hover {
    transform: translateY(-1px);
}

.checkout-btn--primary {
    background: linear-gradient(135deg, var(--checkout-brand) 0%, var(--checkout-brand-strong) 100%);
    color: #fff;
    box-shadow: 0 18px 35px rgba(23, 49, 59, 0.14);
}

.checkout-btn--ghost {
    background: #fff;
    border: 1px solid var(--checkout-line);
    color: var(--checkout-ink);
}

.checkout-btn--soft {
    background: #edf7f6;
    color: var(--checkout-brand-strong);
}

.checkout-btn--warning {
    background: #f59e0b;
    color: #fff;
}

.checkout-icon-btn {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 8px;
    background: #fff2f2;
    color: #c43d3d;
}

.checkout-state-panel,
.checkout-empty {
    max-width: 860px;
    margin: 0 auto;
    padding: 44px 36px;
    text-align: center;
}

.checkout-footer {
    border-top: 1px solid rgba(23, 49, 59, 0.08);
    background: #fff;
}

.checkout-footer__inner {
    min-height: 88px;
    padding-top: 20px;
    padding-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.checkout-footer__brand strong {
    display: block;
    margin-bottom: 6px;
    font-size: 16px;
}

.checkout-footer__brand p {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 14px;
}

.checkout-footer__contact {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 12px 20px;
}

.checkout-footer__contact a,
.checkout-footer__contact span {
    color: var(--checkout-muted);
    font-size: 14px;
    text-decoration: none;
}

.checkout-state-panel__icon,
.checkout-empty__icon {
    font-size: 54px;
    margin-bottom: 18px;
    color: var(--checkout-brand-strong);
}

.checkout-state-panel--error .checkout-state-panel__icon {
    color: #d14343;
}

.checkout-state-panel__title,
.checkout-empty h2 {
    margin: 0 0 14px;
    font-size: 34px;
    font-weight: 700;
}

.checkout-state-panel p,
.checkout-empty p {
    margin: 0 0 24px;
    color: var(--checkout-muted);
    font-size: 16px;
}

.checkout-auth-page {
    min-height: calc(100vh - 190px);
    display: flex;
    align-items: center;
    padding: 48px 0;
}

.checkout-auth-page__container {
    max-width: 1180px;
}

.checkout-auth-page__card,
.checkout-auth-modal {
    border: 1px solid rgba(23, 49, 59, 0.08);
    border-radius: 16px;
    background: #ffffff;
    box-shadow: 0 28px 60px rgba(23, 49, 59, 0.12);
    overflow: hidden;
}

.checkout-auth-page__card {
    max-width: 640px;
    margin: 0 auto;
}

.checkout-auth-modal {
    position: relative;
}

.checkout-auth-modal .modal-body {
    padding: 0;
}

.checkout-auth-modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 3;
}

.shared-auth-shell {
    padding: 40px;
}

.shared-auth-shell__header {
    margin-bottom: 24px;
}

.shared-auth-shell__header h2 {
    margin: 0 0 8px;
    font-size: 32px;
    line-height: 1.1;
    font-weight: 700;
}

.shared-auth-shell__header p {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 15px;
}

.shared-auth-shell__header a,
.shared-auth-link,
.shared-auth-text-btn {
    color: var(--checkout-brand-strong);
    font-weight: 600;
    text-decoration: none;
    background: none;
    border: 0;
    padding: 0;
}

.shared-auth-state {
    display: grid;
    gap: 16px;
}

.shared-auth-field label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
}

.shared-auth-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.shared-auth-row--end {
    justify-content: flex-end;
}

.shared-auth-centered {
    text-align: center;
}

.shared-auth-centered h3 {
    margin: 0 0 8px;
    font-size: 24px;
    font-weight: 800;
}

.shared-auth-centered p {
    margin: 0;
    color: var(--checkout-muted);
}

.shared-auth-code {
    text-align: center;
    letter-spacing: 0.35em;
    font-size: 20px;
    font-weight: 600;
}

.shared-auth-actions {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    flex-wrap: wrap;
}

.shared-auth-password {
    position: relative;
}

.shared-auth-password__toggle {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    border: 0;
    background: transparent;
    color: var(--checkout-muted);
}

.shared-auth-honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.shared-auth-shell .alert {
    margin: 0;
    border-radius: 8px;
    font-size: 14px;
}

.alert {
    padding: 14px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
}

.alert-success {
    background: #ecfdf5;
    border-color: #a7f3d0;
    color: #065f46;
}

.alert-danger {
    background: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

.alert-warning {
    background: #fffbeb;
    border-color: #fde68a;
    color: #92400e;
}

@media (max-width: 1199px) {
    .checkout-header__topbar-inner {
        justify-content: center;
    }

    .checkout-header__inner {
        min-height: 78px;
    }

    .checkout-heading__title {
        font-size: 32px;
    }

    .shared-auth-shell {
        padding: 32px;
    }

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

@media (max-width: 767px) {
    .checkout-card,
    .checkout-sidebar,
    .checkout-state-panel,
    .checkout-empty {
        padding: 22px;
        border-radius: 10px;
    }

    .checkout-summary__item {
        grid-template-columns: 64px minmax(0, 1fr) auto;
    }

    .checkout-summary__media img {
        width: 64px;
        height: 64px;
        border-radius: 10px;
    }

    .checkout-heading__title {
        font-size: 28px;
    }

    .shared-auth-shell {
        padding: 24px 20px;
    }

    .shared-auth-shell__header h2 {
        font-size: 28px;
    }

    .shared-auth-actions,
    .shared-auth-row,
    .checkout-billing-summary__note,
    .checkout-account-callout,
    .checkout-footer__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .checkout-header__actions,
    .checkout-header__topbar-user {
        justify-content: flex-end;
    }

    .checkout-header__cart {
        justify-content: center;
    }

    .shared-auth-actions .checkout-btn {
        width: 100%;
    }

    .checkout-footer__contact {
        justify-content: flex-start;
    }

    .checkout-header__cart span {
        display: none;
    }
}