.b2g-donation-form-wrap {
    max-width: 640px;
    margin: 0 auto;
    font-size: 16px;
}

.b2g-donation-form-wrap * {
    box-sizing: border-box;
}

.b2g-field-group {
    margin-bottom: 22px;
}

.b2g-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #222;
}

.b2g-donation-form-wrap input[type="text"],
.b2g-donation-form-wrap input[type="email"],
.b2g-donation-form-wrap input[type="number"],
.b2g-donation-form-wrap select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
    background: #fff;
}

.b2g-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.b2g-amount-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.b2g-amount-btn {
    padding: 14px 8px;
    border: 2px solid #d8d8d8;
    border-radius: 10px;
    background: #fafafa;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.b2g-amount-btn:hover {
    border-color: var(--b2g-btn-color, #1f7a4d);
}

.b2g-amount-btn.b2g-active {
    border-color: var(--b2g-btn-color, #1f7a4d);
    background: var(--b2g-btn-color, #1f7a4d);
    color: var(--b2g-btn-text, #fff);
}

.b2g-custom-amount {
    margin-top: 6px;
}

.b2g-inline {
    display: flex;
    align-items: flex-start;
}

.b2g-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    cursor: pointer;
}

.b2g-checkbox input {
    margin-top: 4px;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.b2g-payment-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.b2g-radio-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px;
    border: 2px solid #d8d8d8;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
}

.b2g-radio-card input:checked + span {
    font-weight: 700;
}

.b2g-radio-card:has(input:checked) {
    border-color: var(--b2g-btn-color, #1f7a4d);
    background: rgba(31, 122, 77, 0.06);
}

.b2g-method-panel {
    background: #f7f7f7;
    border-radius: 10px;
    padding: 18px;
    margin-bottom: 22px;
}

#b2g-card-element {
    background: #fff;
    padding: 14px;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.b2g-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 22px;
    font-weight: 700;
    padding: 18px 0;
    border-top: 2px solid #eee;
    border-bottom: 2px solid #eee;
    margin-bottom: 22px;
}

.b2g-error {
    color: #c0392b;
    font-size: 14px;
    margin-top: 8px;
    min-height: 18px;
}

.b2g-success {
    background: #eafaf0;
    border: 1px solid #2ecc71;
    color: #1e7e46;
    padding: 16px;
    border-radius: 10px;
    margin-top: 18px;
    font-weight: 500;
}

.b2g-muted {
    color: #666;
    font-size: 14px;
}

/* --- The button: big, high-contrast, color fully controlled from Settings --- */
.b2g-submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 18px 24px;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.02em;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: var(--b2g-btn-color, #1f7a4d);
    color: var(--b2g-btn-text, #ffffff);
    box-shadow: 0 4px 14px rgba(0,0,0,0.18);
    transition: filter 0.15s ease, transform 0.05s ease;
}

.b2g-submit-btn:hover {
    filter: brightness(1.08);
}

.b2g-submit-btn:active {
    transform: translateY(1px);
}

.b2g-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.b2g-btn-spinner {
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255,255,255,0.5);
    border-top-color: #fff;
    border-radius: 50%;
    display: inline-block;
    animation: b2g-spin 0.7s linear infinite;
}

@keyframes b2g-spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 560px) {
    .b2g-amount-grid,
    .b2g-payment-methods,
    .b2g-grid-2 {
        grid-template-columns: 1fr 1fr;
    }
}