:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #f6ad55;
    --light: #f7fafc;
    --dark: #2d3748;
    --success: #48bb78;
    --radius: 12px;
    --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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

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

/* Header */
header {
    text-align: center;
    padding: 2rem 0;
}

header h1 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    color: #666;
}

/* Hero */
.hero {
    text-align: center;
    padding: 3rem 1rem;
    background: white;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.hero h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.product-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.product-content {
    padding: 1.5rem;
}

.product-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.product-description {
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
}

.price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn.secondary {
    background: var(--light);
    color: var(--dark);
    border: 2px solid var(--primary);
}

/* Info Section */
.info-section {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    margin: 3rem 0;
    box-shadow: var(--shadow);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step {
    text-align: center;
    padding: 1.5rem;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin: 0 auto 1rem;
}

/* Success Page */
.success-container {
    max-width: 600px;
}

.success-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 2rem 0;
    text-align: center;
}

.download-box {
    background: #f0f9ff;
    padding: 2rem;
    border-radius: var(--radius);
    margin: 2rem 0;
}

.download-btn {
    display: inline-block;
    background: var(--success);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    margin: 1rem 0;
    transition: var(--transition);
}

.download-btn:hover {
    background: #38a169;
    transform: scale(1.05);
}

.instructions {
    text-align: left;
    margin: 2rem 0;
    padding: 1.5rem;
    background: #fffaf0;
    border-radius: var(--radius);
}

.instructions ol {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.instructions li {
    margin-bottom: 0.5rem;
}

.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.note {
    color: #666;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Loading Spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: #666;
    font-size: 0.9rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    position: relative;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Error States */
.error {
    border-left: 4px solid #f56565;
}

/* Responsive */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .success-card {
        padding: 1.5rem;
    }
}