/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Main content */
main {
    flex: 1;
}

section {
    margin-bottom: 50px;
}

h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #2c3e50;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

/* Image cards */
.image-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 30px;
}

.image-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.logo {
    width: 100%;
    max-width: 500px;
    height: auto;
    display: block;
    margin: 0 auto;
    padding: 40px;
    background: white;
}

.image-info {
    padding: 30px;
    text-align: center;
}

.image-info h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.image-info p {
    color: #7f8c8d;
    margin-bottom: 20px;
}

/* Download buttons */
.download-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.download-btn {
    display: inline-block;
    padding: 12px 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

/* Placeholder text */
.placeholder {
    text-align: center;
    color: #95a5a6;
    font-style: italic;
    padding: 60px 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    color: #7f8c8d;
    border-top: 1px solid #ecf0f1;
    margin-top: 40px;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .logo {
        padding: 20px;
    }
    
    .image-info {
        padding: 20px;
    }
    
    .download-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 20px 0;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .download-links {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 200px;
    }
}