body {
    font-family: sans-serif;
    text-align: center;
    background-color: #f4f4f9;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 600px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.title {
    color: #555;
    font-size: 1.2em;
    margin-bottom: 20px;
}
#word-display {
    font-size: 3em;
    font-weight: bold;
    margin-bottom: 30px;
    color: #2c3e50;
}
.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.option-btn {
    padding: 15px;
    font-size: 1.2em;
    cursor: pointer;
    border: 2px solid #ddd;
    background: #fff;
    border-radius: 8px;
    transition: all 0.2s ease;
}
.option-btn:hover:not(:disabled) {
    background: #f0f0f0;
    border-color: #aaa;
}
.option-btn.correct {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
}
.option-btn.wrong {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}
#status-msg {
    margin-top: 20px;
    font-weight: bold;
    font-size: 1.3em;
    height: 30px;
}
#next-btn {
    display: none;
    margin-top: 20px;
    padding: 12px 25px;
    font-size: 1.2em;
    cursor: pointer;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    transition: background 0.2s;
}
#next-btn:hover {
    background: #2980b9;
}
.back-link {
    display: inline-block;
    margin-top: 20px;
    text-decoration: none;
    color: #7f8c8d;
}