body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    backdrop-filter: blur(10px);
}

.language-content {
    display: none;
}

.language-content.active {
    display: block;
}

h1 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #333;
}

p {
    font-size: 1.1em;
    margin: 15px 0;
    line-height: 1.6;
    color: #555;
}

.progress-bar {
    width: 100%;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    margin: 25px 0;
    height: 20px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
}

.progress {
    width: 75%;
    height: 100%;
    background: linear-gradient(90deg, #4CAF50, #45a049);
    transition: width 1s ease-in-out;
    border-radius: 10px;
}

.percent {
    font-weight: bold;
    font-size: 1.3em;
    color: #4CAF50;
    margin: 10px 0;
}

.language-selector {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.lang-btn {
    padding: 10px 20px;
    border: 2px solid #4CAF50;
    background: transparent;
    color: #4CAF50;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: #4CAF50;
    color: white;
}

.lang-btn.active {
    background: #4CAF50;
    color: white;
}

@media (max-width: 600px) {
    .container {
        padding: 25px 20px;
        margin: 20px;
    }
    
    h1 {
        font-size: 1.6em;
    }
    
    p {
        font-size: 1em;
    }
    
    .language-selector {
        flex-direction: column;
        align-items: center;
    }
    
    .lang-btn {
        width: 80%;
        margin: 5px 0;
    }
}