* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.cpa-payment-container {
    max-width: 500px;
    margin: 40px auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 30px;
}

.cpa-payment-container h2 {
    color: #333;
    margin-bottom: 24px;
    font-size: 24px;
}

.cpa-form-group {
    margin-bottom: 20px;
}

.cpa-form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 14px;
}

.cpa-amount-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.cpa-currency-symbol {
    position: absolute;
    left: 15px;
    color: #666;
    font-size: 18px;
    font-weight: 600;
}

.cpa-payment-container input[type="number"] {
    width: 100%;
    padding: 14px 14px 14px 35px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 18px;
    transition: border-color 0.3s;
    font-weight: 500;
}

.cpa-payment-container input[type="number"]:focus {
    outline: none;
    border-color: #4CAF50;
}

.cpa-payment-container input[type="number"]::-webkit-inner-spin-button,
.cpa-payment-container input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

.cpa-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cpa-btn-add-cart {
    background: #4CAF50;
    color: white;
    margin-bottom: 12px;
}

.cpa-btn-add-cart:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.cpa-btn-add-cart:active {
    transform: translateY(0);
}

.cpa-btn-checkout {
    background: #2196F3;
    color: white;
    display: none;
}

.cpa-btn-checkout:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

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

.cpa-btn-checkout.show {
    display: block;
}

.cpa-message {
    padding: 12px;
    border-radius: 6px;
    margin-top: 16px;
    font-size: 14px;
    display: none;
}

.cpa-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.cpa-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.cpa-helper-text {
    font-size: 12px;
    color: #888;
    margin-top: 6px;
}

.cpa-loading {
    opacity: 0.6;
    pointer-events: none;
}

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