body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
}

#generateTab {
    max-width: 600px;
    margin: 20px auto;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

h2 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: #34495e;
    font-size: 16px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="range"],
.form-group input[type="color"],
.form-group select,
.form-group input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #bdc3c7;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus,
.form-group input[type="range"]:focus,
.form-group input[type="color"]:focus,
.form-group select:focus,
.form-group input[type="file"]:focus {
    border-color: #3498db;
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.5);
}

.form-group input[type="color"] {
    height: 50px;
    padding: 5px;
}

.form-group input[type="range"] {
    -webkit-appearance: none;
    height: 10px;
    background: #ecf0f1;
    border-radius: 5px;
    outline: none;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.form-group input[type="range"]:hover {
    opacity: 1;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    background: #3498db;
    cursor: pointer;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 25px;
    height: 25px;
    background: #3498db;
    cursor: pointer;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.generate-btn, .telegram-btn {
    display: block;
    width: 100%;
    padding: 15px;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    margin-top: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.generate-btn {
    background-color: #2ecc71;
}

.generate-btn:hover {
    background-color: #27ae60;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.telegram-btn {
    background-color: #3498db;
}

.telegram-btn:hover {
    background-color: #2980b9;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.qr-result {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    padding: 20px;
    background-color: #ecf0f1;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#qrSizeValue, #dotScaleValue, #backgroundImageAlphaValue {
    display: inline-block;
    margin-left: 10px;
    font-weight: bold;
    color: #2c3e50;
    font-size: 16px;
}

.form-group input[type="file"] {
    padding: 12px;
    background-color: #f8f9fa;
    border: 2px solid #bdc3c7;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-group input[type="file"]:focus {
    border-color: #3498db;
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.5);
}

.form-group input[type="file"]::-webkit-file-upload-button {
    visibility: hidden;
    width: 0;
}

.form-group input[type="file"]::before {
    content: 'Выберите файл';
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 10px 16px;
    outline: none;
    white-space: nowrap;
    cursor: pointer;
    font-weight: 700;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-group input[type="file"]:hover::before {
    background-color: #2980b9;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.file-input-wrapper {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.file-input-wrapper input[type="file"] {
    flex: 0 0 auto;
    margin-right: 10px;
}

.file-info {
    flex: 1 1 auto;
    margin-top: 5px;
    font-size: 14px;
    color: #7f8c8d;
}

@media (min-width: 768px) {
    .file-input-wrapper {
        flex-wrap: nowrap;
    }

    .file-info {
        margin-top: 0;
    }
}

/* Дополнительные стили для улучшения читаемости */
select {
    background-color: #fff;
    color: #2c3e50;
}

input[type="number"] {
    color: #2c3e50;
}

#qrcode {
    margin-top: 30px;
    text-align: center;
}

#qrcode img {
    max-width: 100%;
    height: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}