qr.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.contain {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 400px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#txt {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    outline: none;
}

#txt:focus {
    border-color: #667eea;
}

#txt::placeholder {
    color: #999;
}

#image {
    max-width: 150px;
    margin: 0 auto;
    display: none;
}

#image[src] {
    display: block;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background: #764ba2;
}

#downloadLink {
    display: none;
    text-decoration: none;
    color: #667eea;
    font-weight: 500;
    padding: 10px 20px;
    border: 2px solid #667eea;
    border-radius: 8px;
    transition: all 0.3s ease;
}

#downloadLink:hover {
    background: #667eea;
    color: white;
}

@media (max-width: 480px) {
    .contain {
        width: 95%;
        padding: 1.5rem;
    }
    
    button, #downloadLink {
        width: 100%;
    }
}