:root {
    --checkout-bg: #f6f8fb;
    --checkout-card: #ffffff;
    --checkout-text: #0f172a;
    --checkout-muted: #64748b;
    --checkout-border: #e2e8f0;
    --checkout-border-dark: #cbd5e1;
    --checkout-primary: #111827;
    --checkout-accent: #4f46e5;
    --checkout-accent-soft: #eef2ff;
    --checkout-success: #166534;
    --checkout-success-soft: #f0fdf4;
}

.checkout-body {
    margin: 0;
    background: var(--checkout-bg);
    color: var(--checkout-text);
}

.checkout-header {
    background: #ffffff;
    border-bottom: 1px solid var(--checkout-border);
}

.checkout-header-inner {
    width: min(1180px, calc(100% - 40px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.checkout-brand {
    display: inline-flex;
    gap: 5px;
    align-items: center;
    color: var(--checkout-text);
    text-decoration: none;
    font-size: 21px;
    letter-spacing: -0.6px;
}

.brand-main {
    font-weight: 850;
}

.brand-shop {
    font-weight: 500;
}

.checkout-header-secure {
    display: flex;
    gap: 7px;
    align-items: center;
    color: var(--checkout-muted);
    font-size: 13px;
    font-weight: 650;
}

.lock-icon {
    font-size: 12px;
}

.checkout-page {
    padding: 55px 0 80px;
}

.checkout-shell {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    display: grid;
    grid-template-columns:
        minmax(0, 1.12fr)
        minmax(340px, 0.88fr);
    gap: 48px;
    align-items: start;
}

.checkout-left {
    min-width: 0;
}

.checkout-heading {
    margin-bottom: 30px;
}

.checkout-kicker {
    color: var(--checkout-accent);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
}

.checkout-heading h1 {
    margin: 0 0 10px;
    font-size: 36px;
    line-height: 1.1;
    letter-spacing: -1.4px;
}

.checkout-heading p {
    margin: 0;
    max-width: 620px;
    color: var(--checkout-muted);
    line-height: 1.65;
    font-size: 15px;
}

.professional-checkout-form {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.form-section {
    background: var(--checkout-card);
    border: 1px solid var(--checkout-border);
    border-radius: 16px;
    padding: 28px;
    box-shadow:
        0 1px 2px rgba(15, 23, 42, 0.02),
        0 8px 30px rgba(15, 23, 42, 0.035);
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 17px;
    font-weight: 750;
}

.section-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--checkout-accent-soft);
    color: var(--checkout-accent);
    font-size: 13px;
    font-weight: 850;
}

.checkout-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.checkout-field {
    margin-bottom: 18px;
}

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

.checkout-field label {
    display: block;
    margin-bottom: 7px;
    color: #334155;
    font-size: 13px;
    font-weight: 700;
}

.checkout-field input,
.checkout-field select {
    appearance: none;
    width: 100%;
    height: 50px;
    padding: 0 14px;
    border: 1px solid var(--checkout-border-dark);
    border-radius: 9px;
    background: #ffffff;
    color: var(--checkout-text);
    font-family: inherit;
    font-size: 15px;
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.checkout-field select {
    cursor: pointer;
    background-image:
        linear-gradient(
            45deg,
            transparent 50%,
            #64748b 50%
        ),
        linear-gradient(
            135deg,
            #64748b 50%,
            transparent 50%
        );
    background-position:
        calc(100% - 18px) 22px,
        calc(100% - 13px) 22px;
    background-size:
        5px 5px,
        5px 5px;
    background-repeat: no-repeat;
}

.checkout-field input:hover,
.checkout-field select:hover {
    border-color: #94a3b8;
}

.checkout-field input:focus,
.checkout-field select:focus {
    outline: none;
    border-color: var(--checkout-accent);
    box-shadow:
        0 0 0 3px rgba(79, 70, 229, 0.12);
}

.checkout-field input::placeholder {
    color: #94a3b8;
}

.checkout-field small {
    display: block;
    margin-top: 6px;
    color: var(--checkout-muted);
    font-size: 12px;
    line-height: 1.45;
}

.payment-box {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 20px;
    border: 1px solid #dbeafe;
    border-radius: 12px;
    background: #f8fbff;
}

.payment-box-icon {
    font-size: 18px;
}

.payment-box strong {
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
}

.payment-box p {
    margin: 0;
    color: var(--checkout-muted);
    font-size: 13px;
    line-height: 1.55;
}

.checkout-submit {
    width: 100%;
    min-height: 58px;
    border: 0;
    border-radius: 10px;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    background: var(--checkout-primary);
    color: #ffffff;
    font-family: inherit;
    font-size: 15px;
    font-weight: 800;
    cursor: pointer;
    transition:
        transform 0.12s ease,
        opacity 0.12s ease;
}

.checkout-submit:hover {
    opacity: 0.94;
    transform: translateY(-1px);
}

.checkout-submit:active {
    transform: translateY(0);
}

.checkout-submit span {
    white-space: nowrap;
}

.checkout-trust {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 18px;
    color: var(--checkout-muted);
    font-size: 12px;
}

.checkout-summary {
    position: sticky;
    top: 28px;
}

.summary-card {
    overflow: hidden;
    background: var(--checkout-card);
    border: 1px solid var(--checkout-border);
    border-radius: 16px;
    box-shadow:
        0 1px 2px rgba(15, 23, 42, 0.02),
        0 12px 40px rgba(15, 23, 42, 0.055);
}

.summary-card h2 {
    margin: 0;
    padding: 24px 26px 20px;
    font-size: 20px;
    letter-spacing: -0.4px;
}

.summary-product {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 16px;
    align-items: center;
    padding: 0 26px 24px;
}

.summary-image {
    width: 90px;
    height: 90px;
    overflow: hidden;
    border-radius: 12px;
    background: #f1f5f9;
}

.summary-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.summary-product-info {
    min-width: 0;
}

.summary-product-info strong {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    line-height: 1.4;
}

.summary-product-info span {
    color: var(--checkout-muted);
    font-size: 12px;
}

.summary-pricing {
    padding: 18px 26px;
    border-top: 1px solid var(--checkout-border);
    border-bottom: 1px solid var(--checkout-border);
}

.summary-line {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 7px 0;
    color: var(--checkout-muted);
    font-size: 14px;
}

.summary-line strong {
    color: var(--checkout-text);
    font-weight: 700;
}

.summary-total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 26px;
    font-size: 16px;
    font-weight: 750;
}

.summary-total > div {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.summary-total small {
    color: var(--checkout-muted);
    font-size: 11px;
    font-weight: 700;
}

.summary-total strong {
    font-size: 25px;
    letter-spacing: -0.7px;
}

.summary-protection {
    display: flex;
    gap: 12px;
    margin: 0 26px 22px;
    padding: 15px;
    border-radius: 10px;
    background: var(--checkout-success-soft);
}

.summary-protection p {
    margin: 0;
    color: #475569;
    font-size: 12px;
    line-height: 1.5;
}

.summary-protection strong {
    display: block;
    margin-bottom: 2px;
    color: var(--checkout-success);
}

.summary-benefits {
    padding: 20px 26px;
    border-top: 1px solid var(--checkout-border);
    display: grid;
    gap: 9px;
    color: #475569;
    font-size: 12px;
}

.checkout-footer {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 28px 0 45px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    border-top: 1px solid var(--checkout-border);
    color: var(--checkout-muted);
    font-size: 12px;
}

@media (max-width: 900px) {
    .checkout-shell {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .checkout-summary {
        position: static;
    }
}

@media (max-width: 640px) {
    .checkout-header-inner,
    .checkout-shell,
    .checkout-footer {
        width: min(100% - 28px, 1180px);
    }

    .checkout-header-inner {
        min-height: 64px;
    }

    .checkout-header-secure {
        font-size: 11px;
    }

    .checkout-page {
        padding: 32px 0 55px;
    }

    .checkout-heading h1 {
        font-size: 30px;
    }

    .checkout-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-section {
        padding: 21px;
    }

    .summary-card h2,
    .summary-product,
    .summary-pricing,
    .summary-total,
    .summary-benefits {
        padding-left: 21px;
        padding-right: 21px;
    }

    .summary-protection {
        margin-left: 21px;
        margin-right: 21px;
    }

    .checkout-submit {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        padding: 13px 18px;
    }

    .checkout-trust {
        gap: 10px;
    }

    .checkout-footer {
        flex-direction: column;
    }
}

/* Put the two checkout form sections side-by-side on desktop */
.professional-checkout-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    align-items: start;
}

/* Keep payment notice, button and trust row full width */
.payment-box,
.checkout-submit,
.checkout-trust {
    grid-column: 1 / -1;
}

/* Slightly reduce card padding so both fit comfortably */
.form-section {
    padding: 24px;
}

/* Keep inner paired fields responsive inside each card */
.checkout-row {
    grid-template-columns: 1fr 1fr;
}

/* Tablet/mobile: stack everything again */
@media (max-width: 1050px) {
    .professional-checkout-form {
        grid-template-columns: 1fr;
    }

    .payment-box,
    .checkout-submit,
    .checkout-trust {
        grid-column: auto;
    }
}

@media (max-width: 640px) {
    .checkout-row {
        grid-template-columns: 1fr;
    }
}

/* Align order summary with the shipping address card */
@media (min-width: 901px) {
    .checkout-summary {
        margin-top: 130px;
    }
}

/* Keep the normal stacked layout on mobile */
@media (max-width: 900px) {
    .checkout-summary {
        margin-top: 0;
    }
}