body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

h1, h2, h3 {
    color: #2c3e50;
    margin-top: 0;
}

.btn {
    display: inline-block;
    background: #27ae60;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
}

.btn:hover {
    background: #219150;
}

.btn-secondary {
    background: #2980b9;
}

.btn-secondary:hover {
    background: #2471a3;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 12px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

.situation-box {
    background: #ecf0f1;
    padding: 20px;
    border-left: 5px solid #3498db;
    margin-bottom: 20px;
}

.options label {
    display: block;
    background: #fff;
    padding: 15px;
    margin-bottom: 10px;
    border: 1px solid #bdc3c7;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.options label:hover {
    background: #eaf2f8;
}

.result-box {
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 4px;
    color: #fff;
}

.result-success {
    background: #2ecc71;
}

.result-error {
    background: #e74c3c;
}

.score-display {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 4px;
}