/* CSS Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #5E6AD2;
    --color-primary-hover: #4C56C4;
    --color-background: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text-primary: #1B1B1F;
    --color-text-secondary: #6E6E80;
    --color-text-muted: #9B9BAA;
    --color-border-light: #E5E5E7;
    --color-border: #E5E5E7;
    --color-border-strong: #D1D1D6;
    
    /* Status Colors */
    --color-success: #22C55E;
    --color-success-bg: #F0FDF4;
    --color-success-border: #BBF7D0;
    --color-error: #EF4444;
    --color-error-bg: #FEF2F2;
    --color-error-border: #FECACA;
    --color-info: #3B82F6;
    --color-info-bg: #EFF6FF;
    --color-info-border: #DBEAFE;
    
    /* Spacing Scale (8px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.5;
    font-size: 16px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout Components */
.page-container {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-6);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.page-header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-4) 0;
}

.brand-logo {
    height: 40px;
    width: auto;
    opacity: 0.7;
}

.download-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-12);
    margin: auto 0;
}

/* Product Hero Section */
.product-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    margin-bottom: var(--space-10);
    text-align: center;
}

.product-image-container {
    position: relative;
    width: 160px;
    height: 232px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
}

.product-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.2;
    margin: 0;
}

.download-counter {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    align-items: center;
}

.counter-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.counter-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* Download Status */
.download-status {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-8);
    transition: all 0.2s ease;
}

.download-status.downloading {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    color: var(--color-info);
}

.download-status.success {
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success);
}

.download-status.error {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    color: var(--color-error);
}

.status-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.status-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.status-title {
    font-weight: 600;
    font-size: 16px;
}

.status-message {
    font-size: 14px;
    opacity: 0.8;
}

/* Manual Download Section */
.manual-download {
    display: none;
    text-align: center;
    padding: var(--space-6);
    background: var(--color-background);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.manual-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-primary);
    color: white;
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.download-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

/* Footer */
.page-footer {
    text-align: center;
    padding: var(--space-4) 0;
    margin-top: auto;
}

.support-text {
    font-size: 14px;
    color: var(--color-text-muted);
}

.support-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.support-link:hover {
    text-decoration: underline;
}

/* Spinner Animation */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Error Page Styles */
.error-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    margin-bottom: var(--space-10);
    text-align: center;
}

.error-icon-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: var(--radius-xl);
    color: var(--color-error);
}

.error-icon {
    flex-shrink: 0;
}

.error-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
    max-width: 400px;
}

.error-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.2;
    margin: 0;
}

.error-message {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
}

.primary-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-primary);
    color: white;
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.primary-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .page-container {
        padding: var(--space-4);
        gap: var(--space-6);
    }
    
    .download-card {
        padding: var(--space-8);
    }
    
    .product-image-container {
        width: 120px;
        height: 120px;
    }
    
    .product-title {
        font-size: 20px;
    }
    
    .error-title {
        font-size: 20px;
    }
    
    .error-icon-container {
        width: 64px;
        height: 64px;
    }
    
    .error-icon-container svg {
        width: 48px;
        height: 48px;
    }
    
    .download-status {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
    }
}

@media (max-width: 480px) {
    .page-container {
        padding: var(--space-3);
    }
    
    .download-card {
        padding: var(--space-6);
    }
    
    .product-image-container {
        width: 100px;
        height: 100px;
    }
    
    .error-hero {
        gap: var(--space-4);
        margin-bottom: var(--space-8);
    }
    
    .error-content {
        gap: var(--space-2);
    }
}