body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-footer {
    margin-top: auto;
}

.page-hero h1 {
    font-size: 28px;
}

.pay-page {
    max-width: 48rem;
    padding: 28px 0 56px;
}

.pay-page .lede {
    margin: 0 0 1.25rem;
    color: var(--text-muted);
    font-size: 15.5px;
    line-height: var(--lh-relaxed);
}

.pay-page fieldset {
    background: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin: 0 0 20px;
    padding: 22px 24px;
}

.pay-page legend {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    font-size: 15px;
    color: var(--text-strong);
    letter-spacing: -0.01em;
    padding: 0 0.45rem;
    margin-left: -16px;
}

.pay-page label {
    display: block;
    margin: 0.75rem 0 0.25rem;
    font-size: 13.5px;
    font-weight: var(--fw-semibold);
    color: var(--text-strong);
}

.pay-page label:first-of-type {
    margin-top: 0;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 16px;
    row-gap: 0.75rem;
}

.field-row + .field-row {
    margin-top: 0.75rem;
}

.field-row .field label {
    margin-top: 0;
}

.field {
    min-width: 0;
}

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

.pay-page .req {
    color: var(--np-red-600);
}

.pay-page input[type="text"],
.pay-page input[type="email"],
.pay-page input[type="tel"],
.pay-page input[type="number"],
.pay-page select {
    width: 100%;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--text-body);
    padding: 0.5rem 0.65rem;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    background: var(--surface-card);
}

.pay-page input:focus,
.pay-page select:focus {
    outline: none;
    border-color: var(--np-blue-400);
    box-shadow: var(--ring-focus);
}

.amount-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.amount-prefix {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: var(--fw-bold);
    color: var(--text-strong);
}

.amount-row input {
    flex: 1;
}

.hint {
    margin: 0.3rem 0 0;
    font-size: 13px;
    color: var(--text-muted);
    line-height: var(--lh-normal);
}

.error {
    border: 1px solid var(--np-red-100);
    background: var(--danger-bg);
    color: var(--np-red-600);
    border-radius: var(--radius-sm);
    padding: 0.75rem 0.9rem;
    margin: 0 0 1rem;
    font-size: 14.5px;
}

.pay-page .actions {
    margin-top: 0.25rem;
}

.pay-page .actions .error {
    margin: 0 0 0.85rem;
}

#submit-button:disabled {
    cursor: wait;
    opacity: 0.7;
}

#payment-element {
    min-height: 2.5rem;
}

#loading {
    color: var(--text-muted);
    font-size: 15px;
}