/* Payment Page Styles */
:root {
    --color-primary-blue: #05325f;
    --color-secondary-green: #2d5a3d;
    --color-accent-green: #4a7c59;
    --color-black: #000000;
    --color-gray-dark: #4a4a4a;
    --color-gray-medium: #767676;
    --color-gray-light: #f5f5f5;
    --color-gray-border: #ddd;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    --border-radius-md: 8px;
    --border-radius-lg: 15px;
    --font-family-primary: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: var(--font-family-primary);
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    min-height: 100vh;
    padding: 0;
}

.secure-header {
    background: white;
    padding: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.secure-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    height: 50px;
    width: auto;
}

.secure-badge {
    background: linear-gradient(135deg, var(--color-secondary-green), var(--color-accent-green));
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
}

.back-link {
    color: var(--color-primary-blue);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    transition: opacity var(--transition-normal);
}

.back-link:hover {
    opacity: 0.7;
}

.payment-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.payment-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.payment-header h1 {
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.payment-header p {
    color: var(--color-gray-dark);
}

.flow-indicator {
    background: linear-gradient(135deg, var(--color-secondary-green), var(--color-accent-green));
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.step {
    display: none;
    background: white;
    padding: var(--spacing-xxl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.step.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.step-number {
    background: var(--color-primary-blue);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.step-header h2 {
    color: var(--color-black);
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-black);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-gray-border);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-family: var(--font-family-primary);
    transition: border-color var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-blue);
    box-shadow: 0 0 0 3px rgba(5, 50, 95, 0.1);
}

.course-info-display {
    background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--color-secondary-green);
}

.course-info-display h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
    font-size: 1.2rem;
}

.course-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.course-detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-dark);
}

.course-detail-item i {
    color: var(--color-primary-blue);
    width: 18px;
}

.radio-group {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-sm);
}

.radio-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.radio-item input[type="radio"] {
    width: auto;
    margin: 0;
}

.summary {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
}

.summary h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--color-black);
}

.summary-total {
    border-top: 2px solid var(--color-gray-dark);
    padding-top: var(--spacing-md);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
    color: var(--color-primary-blue);
}

#payment-element {
    margin: var(--spacing-lg) 0;
}

.error {
    color: #721c24;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin-top: var(--spacing-md);
}

.success-message {
    text-align: center;
    color: var(--color-secondary-green);
    padding: var(--spacing-xl);
}

.success-message i {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary-green);
}

.success-message p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.loading {
    text-align: center;
    padding: var(--spacing-xxl);
}

.spinner {
    border: 4px solid var(--color-gray-light);
    border-top: 4px solid var(--color-primary-blue);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.button-row {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.btn {
    background: linear-gradient(135deg, var(--color-primary-blue), #0a4a8a);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(5, 50, 95, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-back {
    background: var(--color-gray-dark);
}

.btn-back:hover {
    background: var(--color-gray-medium);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid #ffeaa7;
}

.alert-warning h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.secure-footer {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-gray-dark);
    font-size: 0.9rem;
}

.secure-footer a {
    color: var(--color-primary-blue);
    text-decoration: none;
}

.secure-footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .secure-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .course-details-grid {
        grid-template-columns: 1fr;
    }
    
    .button-row {
        flex-direction: column;
    }
    
    .button-row .btn {
        width: 100%;
    }
    
    .radio-group {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .step {
        padding: var(--spacing-lg);
    }
    
    .payment-container {
        padding: var(--spacing-md);
    }
}