/* Custom Amount Checkout - Modern Styling v1.2.0 */

:root {
    --cac-primary: #00C300;
    --cac-primary-dark: #00A800;
    --cac-secondary: #2563EB;
    --cac-secondary-dark: #1D4ED8;
    --cac-bg: #FFFFFF;
    --cac-border: #E5E7EB;
    --cac-text: #1F2937;
    --cac-text-light: #6B7280;
    --cac-error: #DC2626;
    --cac-success: #059669;
    --cac-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --cac-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --cac-radius: 12px;
    --cac-radius-sm: 8px;
}

.cac-checkout-form {
    max-width: 380px;
    margin: 40px auto;
    padding: 32px;
    background: var(--cac-bg);
    border-radius: var(--cac-radius);
    box-shadow: var(--cac-shadow-lg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Amount Section */
.cac-amount-section {
    margin-bottom: 24px;
}

.cac-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--cac-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.cac-amount-input-wrapper {
    display: flex;
    align-items: stretch;
    background: #fff;
    border: 2px solid var(--cac-border);
    border-radius: var(--cac-radius-sm);
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.cac-amount-input-wrapper:focus-within {
    border-color: var(--cac-primary);
    box-shadow: 0 0 0 3px rgba(0, 195, 0, 0.15);
}

.cac-currency {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--cac-text-light);
    background: #F3F4F6;
    border-right: 2px solid var(--cac-border);
    white-space: nowrap;
    min-width: 60px;
}

.cac-amount-input-wrapper input#cac-amount,
.cac-amount-input-wrapper input[type="number"] {
    flex: 1;
    border: none !important;
    background: transparent !important;
    padding: 16px !important;
    font-size: 24px !important;
    font-weight: 700 !important;
    color: var(--cac-text) !important;
    text-align: right !important;
    width: 100% !important;
    min-width: 0;
    outline: none !important;
    box-shadow: none !important;
    -moz-appearance: textfield;
    margin: 0 !important;
    height: auto !important;
    line-height: 1.2 !important;
}

.cac-amount-input-wrapper input::-webkit-outer-spin-button,
.cac-amount-input-wrapper input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.cac-amount-input-wrapper input::placeholder {
    color: #D1D5DB;
    font-weight: 400;
}

/* Divider */
.cac-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cac-border), transparent);
    margin: 24px 0;
}

/* Payment Section */
.cac-payment-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cac-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--cac-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 8px 0;
}

/* Payment Buttons */
.cac-payment-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 18px 24px;
    border: none;
    border-radius: var(--cac-radius-sm);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.cac-payment-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.2s;
}

.cac-payment-btn:hover::before {
    opacity: 1;
}

.cac-payment-btn:active {
    transform: scale(0.98);
}

.cac-btn-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.cac-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.cac-btn-text {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* LINE Pay Button */
.cac-btn-linepay {
    background: linear-gradient(135deg, #00C300 0%, #00B300 100%);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(0, 195, 0, 0.4);
}

.cac-btn-linepay:hover {
    box-shadow: 0 6px 20px 0 rgba(0, 195, 0, 0.5);
    transform: translateY(-2px);
}

/* NewebPay Button */
.cac-btn-newebpay {
    background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.4);
}

.cac-btn-newebpay:hover {
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.5);
    transform: translateY(-2px);
}

/* Disabled Button */
.cac-btn-disabled {
    background: #E5E7EB;
    color: #9CA3AF;
    cursor: not-allowed;
    box-shadow: none;
}

.cac-btn-disabled:hover {
    transform: none;
}

.cac-btn-disabled:hover::before {
    opacity: 0;
}

/* Loading State */
.cac-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    margin-top: 16px;
    background: #F9FAFB;
    border-radius: var(--cac-radius-sm);
    color: var(--cac-text-light);
    font-size: 14px;
}

.cac-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--cac-border);
    border-top-color: var(--cac-primary);
    border-radius: 50%;
    animation: cac-spin 0.8s linear infinite;
}

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

/* Error Message */
.cac-error {
    margin-top: 16px;
    padding: 14px 18px;
    background: #FEF2F2;
    color: var(--cac-error);
    border-radius: var(--cac-radius-sm);
    font-size: 14px;
    text-align: center;
    border: 1px solid #FECACA;
}

/* Shake Animation */
.cac-shake {
    animation: cac-shake 0.4s ease-in-out;
}

@keyframes cac-shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

/* Responsive */
@media (max-width: 480px) {
    .cac-checkout-form {
        margin: 20px 16px;
        padding: 24px 20px;
    }
    
    .cac-amount-input-wrapper input#cac-amount,
    .cac-amount-input-wrapper input[type="number"] {
        font-size: 20px !important;
        padding: 14px 12px !important;
    }
    
    .cac-currency {
        padding: 0 12px;
        font-size: 14px;
        min-width: 50px;
    }
    
    .cac-payment-btn {
        padding: 16px 20px;
    }
    
    .cac-btn-text {
        font-size: 15px;
    }
}