:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #34495e;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Language Switcher */
.language-switch {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: white;
    border-radius: 25px;
    padding: 5px;
    box-shadow: var(--box-shadow);
}

.language-switch a {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: var(--transition);
}

.language-switch a.active {
    background: var(--primary-color);
    color: white;
}

/* Header */
header {
    background: white;
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--box-shadow);
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.logo i {
    font-size: 48px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 36px;
    color: var(--dark-color);
}

.tagline {
    margin-top: 10px;
    font-size: 18px;
    color: var(--text-color);
    opacity: 0.8;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
    animation: fadeIn 0.5s ease;
}

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

/* Step Indicator */
.step-indicator {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-color);
    transition: var(--transition);
}

.step.active {
    background: var(--primary-color);
    color: white;
}

.step.done {
    background: var(--secondary-color);
    color: white;
}

/* Upload Area */
.upload-area {
    border: 3px dashed var(--primary-color);
    border-radius: var(--border-radius);
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin: 30px 0;
}

.upload-area:hover {
    background: var(--light-color);
    border-color: var(--secondary-color);
}

.upload-area.dragging {
    background: var(--light-color);
    border-color: var(--secondary-color);
    transform: scale(1.02);
}

.upload-area i {
    font-size: 64px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.upload-area p {
    font-size: 18px;
    color: var(--text-color);
    margin-bottom: 10px;
}

.file-formats {
    font-size: 14px;
    color: #95a5a6;
}

/* Language Selector */
.language-selector {
    margin: 30px 0;
}

.language-selector label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--dark-color);
}

.language-selector select {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--light-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    background: white;
    cursor: pointer;
    transition: var(--transition);
}

.language-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    margin: 10px 5px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background: var(--light-color);
    color: var(--dark-color);
}

.btn-secondary:hover {
    background: #bdc3c7;
}

.btn-success {
    background: var(--secondary-color);
    color: white;
}

.btn-success:hover {
    background: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(46, 204, 113, 0.3);
}

.btn-paypal {
    background: #0070ba;
    color: white;
}

.btn-paypal:hover {
    background: #005ea6;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--light-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

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

/* Preview Section */
.preview-notice {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: #fff3cd;
    border-left: 4px solid var(--warning-color);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.preview-notice i {
    font-size: 24px;
    color: var(--warning-color);
}

.preview-container {
    margin: 30px 0;
    border: 1px solid var(--light-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.preview-container iframe {
    border: none;
    width: 100%;
}

/* Preview Mode Toggle */
.preview-mode-toggle {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.mode-btn {
    padding: 12px 24px;
    border: 2px solid #007bff;
    background: white;
    color: #007bff;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mode-btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}

.mode-btn.active {
    background: #007bff;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

/* Price Box */
.price-box {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--border-radius);
    color: white;
    margin: 30px 0;
}

.price {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
}

.currency {
    font-size: 32px;
}

/* Payment Buttons */
.payment-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 30px 0;
}

/* Success Section */
.success-icon {
    text-align: center;
    margin: 30px 0;
}

.success-icon i {
    font-size: 80px;
    color: var(--secondary-color);
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.feature i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature p {
    color: var(--text-color);
    font-size: 14px;
}

/* Footer */
footer {
    background: var(--dark-color);
    color: white;
    padding: 30px 20px;
    margin-top: 60px;
    text-align: center;
}

.footer-links {
    margin-top: 15px;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-color);
}

#card-element {
    margin: 30px 0;
    padding: 15px;
    border: 2px solid var(--light-color);
    border-radius: var(--border-radius);
}

#card-errors {
    color: var(--danger-color);
    margin: 15px 0;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo h1 {
        font-size: 28px;
    }
    
    .tagline {
        font-size: 16px;
    }
    
    .card {
        padding: 20px;
    }
    
    .upload-area {
        padding: 40px 20px;
    }
    
    .upload-area i {
        font-size: 48px;
    }
    
    .price {
        font-size: 36px;
    }
    
    .payment-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        padding: 20px;
    }
}

/* Print Styles */
@media print {
    .language-switch,
    header,
    .step-indicator,
    .btn,
    footer {
        display: none !important;
    }
}

/* Accessibility */
.btn:focus,
select:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Animation for hover effects */
.btn,
.feature,
.upload-area {
    will-change: transform;
}

/* Loading state overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Margin Controls Styles */
.margin-controls {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 30px;
    margin: 30px 0;
    transition: var(--transition);
}

.margin-controls h3 {
    color: var(--dark-color);
    margin-bottom: 10px;
    font-size: 20px;
    text-align: center;
}

.margin-description {
    color: var(--text-color);
    opacity: 0.8;
    text-align: center;
    margin-bottom: 25px;
    font-size: 14px;
}

.margin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.margin-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.margin-control label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 14px;
}

.margin-slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.margin-slider {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.margin-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.margin-slider::-webkit-slider-thumb:hover {
    background: #2980b9;
    transform: scale(1.1);
}

.margin-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.margin-slider::-moz-range-thumb:hover {
    background: #2980b9;
    transform: scale(1.1);
}

.margin-value {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 60px;
    text-align: right;
    font-size: 14px;
}

.margin-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-info {
    background-color: #17a2b8;
    color: white;
}

.btn-info:hover {
    background-color: #138496;
}

.btn-info:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}

/* Responsive adjustments for margin controls */
@media (max-width: 768px) {
    .margin-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .margin-slider-container {
        gap: 10px;
    }

    .margin-value {
        min-width: 50px;
        font-size: 13px;
    }

    .margin-actions {
        flex-direction: column;
        align-items: center;
    }

    .margin-actions .btn {
        width: 100%;
        max-width: 200px;
    }
}