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

/* Body styles */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
    background-color: #f0f0f0;  /* Light grey background */
    color: #333;  /* Darker text for better contrast */
}

/* Headline styles */
.headline {
    text-align: center;
    color: #333;
    margin-bottom: 5px;
    font-size: 28px;
}

.tagline {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
    font-size: 16px;
}

/* Main container styles */
.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #ffffff;  /* White container background */
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid #ddd;
}

/* Tab navigation styles */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-button {
    padding: 10px 20px;
    border: 1px solid #ddd;
    background-color: #ffffff;
    color: #333;
    cursor: pointer;
    border-radius: 4px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.tab-button:hover {
    background-color: #f5f5f5;
}

.tab-button.active {
    background-color: #333;
    color: #ffffff;
    border-color: #333;
}

/* Form styles */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

input, 
select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    background-color: #ffffff;
    color: #333;
    transition: all 0.3s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: #333;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

/* Button styles */
button {
    background-color: #333;
    color: #ffffff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    transition: all 0.3s ease;
    font-weight: bold;
}

button:hover {
    background-color: #444;
}

button:active {
    transform: translateY(1px);
}

/* QR code container styles */
#qrcode {
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #ffffff;
}

/* Tab content styles */
.tab-content {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tab-content.active {
    display: block;
    opacity: 1;
}

/* Logo size control styles */
.logo-size-control {
    display: flex;
    align-items: center;
    margin-top: 8px;
    flex-wrap: wrap;
}

.logo-size-control label {
    flex: 0 0 100px;
    margin-bottom: 0;
}

.logo-size-control input[type="range"] {
    flex: 1;
    margin-right: 10px;
}

.logo-size-control span {
    width: 40px;
    text-align: right;
}

/* File info styles */
.file-info {
    font-size: 12px;
    color: #666;
    margin-top: 4px;
    margin-bottom: 8px;
}

/* Error message styles */
.error-message {
    color: #e74c3c;
    font-size: 13px;
    margin-top: 5px;
    font-weight: bold;
    min-height: 20px;
}

/* Download button styles */
#download-container {
    margin-top: 20px;
}

#download-btn {
    background-color: #4CAF50;
    max-width: 200px;
    margin: 0 auto;
}

#download-btn:hover {
    background-color: #45a049;
}

/* Responsive styles */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .tabs {
        flex-direction: column;
        gap: 5px;
    }
    
    .tab-button {
        width: 100%;
    }
    
    .logo-size-control {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo-size-control input[type="range"] {
        width: 100%;
        margin: 5px 0;
    }
}