:root {
    color-scheme: light;
    --checkout-ink: #182238;
    --checkout-muted: #657087;
    --checkout-border: #dfe4ec;
    --checkout-surface: #ffffff;
    --checkout-canvas: #f4f6f9;
    --checkout-primary: #244f93;
    --checkout-primary-hover: #1c4079;
    --checkout-error: #a12e2a;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--checkout-canvas);
}

body.payment-checkout-page {
    min-height: 100vh;
    margin: 0;
    background: var(--checkout-canvas);
    color: var(--checkout-ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

.payment-checkout-shell {
    width: min(100%, 700px);
    margin: 0 auto;
    padding: 48px 24px 32px;
}

.payment-checkout-card {
    overflow: hidden;
    border: 1px solid var(--checkout-border);
    border-radius: 20px;
    background: var(--checkout-surface);
    box-shadow: 0 18px 45px rgba(24, 34, 56, 0.08);
}

.payment-checkout-summary {
    padding: 34px 40px 28px;
    border-bottom: 1px solid var(--checkout-border);
    text-align: center;
}

.payment-checkout-logo {
    width: 48px;
    height: 48px;
    margin-bottom: 14px;
    object-fit: contain;
}

.payment-checkout-merchant,
.payment-checkout-summary h1,
.payment-checkout-amount,
.payment-checkout-summary-title,
.payment-checkout-reference {
    margin: 0;
}

.payment-checkout-merchant {
    color: var(--checkout-muted);
    font-size: 14px;
    font-weight: 650;
}

.payment-checkout-summary h1 {
    margin-top: 5px;
    font-size: 22px;
    letter-spacing: -0.02em;
}

.payment-checkout-amount {
    margin-top: 14px;
    font-size: clamp(32px, 7vw, 42px);
    font-weight: 720;
    letter-spacing: -0.04em;
}

.payment-checkout-summary-title {
    margin-top: 3px;
    color: var(--checkout-muted);
    font-size: 16px;
}

.payment-checkout-reference {
    margin-top: 8px;
    color: var(--checkout-muted);
    font-size: 13px;
}

.payment-checkout-form {
    display: grid;
    gap: 20px;
    padding: 32px 40px 38px;
}

.payment-checkout-field,
.payment-checkout-field-grid {
    min-width: 0;
}

.payment-checkout-field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.payment-checkout-field label,
.payment-checkout-label {
    display: block;
    margin-bottom: 7px;
    color: #344057;
    font-size: 14px;
    font-weight: 650;
}

.payment-checkout-field input {
    display: block;
    width: 100%;
    height: 50px;
    padding: 12px 14px;
    border: 1px solid #cbd3df;
    border-radius: 10px;
    background: #fff;
    color: var(--checkout-ink);
    font: inherit;
}

.payment-checkout-field input:focus {
    border-color: var(--checkout-primary);
    outline: 3px solid rgba(36, 79, 147, 0.14);
}

.payment-checkout-clover-field {
    width: 100%;
    min-height: 50px;
}

.payment-checkout-clover-field iframe {
    display: block;
    width: 100% !important;
    height: 50px !important;
}

.payment-checkout-field-error {
    min-height: 0;
    margin-top: 5px;
    color: var(--checkout-error);
    font-size: 13px;
}

.payment-checkout-recaptcha {
    overflow-x: auto;
}

.payment-checkout-submit {
    min-height: 50px;
    border: 0;
    border-radius: 10px;
    background: var(--checkout-primary);
    color: #fff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    transition: background-color 140ms ease, transform 140ms ease;
}

.payment-checkout-submit:hover {
    background: var(--checkout-primary-hover);
}

.payment-checkout-submit:active {
    transform: translateY(1px);
}

.payment-checkout-submit:disabled {
    cursor: wait;
    opacity: 0.65;
}

.payment-checkout-alert {
    margin-bottom: 16px;
    padding: 12px 14px;
    border: 1px solid #d7dfea;
    border-radius: 10px;
    background: #f8fafc;
    font-size: 14px;
}

.payment-checkout-alert.is-error {
    border-color: #efc2bf;
    background: #fff5f4;
    color: var(--checkout-error);
}

.payment-checkout-alert[hidden] {
    display: none;
}

.payment-checkout-footer {
    display: flex;
    justify-content: center;
    gap: 18px;
    padding: 22px 12px 0;
    color: var(--checkout-muted);
    font-size: 13px;
}

.payment-checkout-footer a {
    color: var(--checkout-primary);
    text-decoration: none;
}

.payment-checkout-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .payment-checkout-shell {
        padding: 18px 12px 24px;
    }

    .payment-checkout-summary {
        padding: 28px 22px 24px;
    }

    .payment-checkout-form {
        gap: 18px;
        padding: 26px 20px 30px;
    }

    .payment-checkout-field-grid {
        grid-template-columns: 1fr;
    }

    .payment-checkout-footer {
        align-items: center;
        flex-direction: column;
        gap: 6px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .payment-checkout-submit {
        transition: none;
    }
}