.uprimer-h5-pay {
    max-width: 420px;
    margin: 24px auto;
    padding: 24px;
    border: 1px solid #e5e5e5;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .05);
}

.uprimer-h5-form .uprimer-h5-field {
    display: block;
    margin-bottom: 18px;
}

.uprimer-h5-field > span {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.uprimer-h5-form input[type="number"] {
    width: 100%;
    padding: 12px;
    font-size: 20px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
}

.uprimer-h5-channel {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-right: 20px;
    font-weight: 400;
}

.uprimer-h5-submit {
    width: 100%;
    padding: 14px;
    font-size: 18px;
    color: #fff;
    background: #484dd4;
    border: 0;
    border-radius: 6px;
    cursor: pointer;
}

.uprimer-h5-submit:hover {
    opacity: .92;
}

.uprimer-h5-error {
    margin-bottom: 16px;
    padding: 10px 14px;
    color: #a00;
    background: #fdecec;
    border: 1px solid #f5c2c2;
    border-radius: 6px;
}