body {
    font-family: Assistant, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background-color: white;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 500px;
}

h1 {
    color: #1a73e8;
}

button {
    background-color: #1a73e8;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:disabled {
    background-color: #a0c3ff;
    cursor: not-allowed;
}

button:hover:not(:disabled) {
    background-color: #1558b3;
}

.results-container {
    margin-top: 25px;
    text-align: right;
    font-size: 18px;
    line-height: 1.8;
}

.final-score {
    margin-top: 20px;
    font-size: 24px;
    font-weight: bold;
    padding: 15px;
    border-radius: 8px;
}

.score-good {
    color: #1e8e3e;
    background-color: #e6f4ea;
}

.score-ok {
    color: #f29900;
    background-color: #fff8e1;
}

.score-bad {
    color: #d93025;
    background-color: #fce8e6;
}