body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #f5f5f5;
}
.container {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}
.section {
    margin: 20px 0;
    padding: 15px;
    border: 1px solid #eee;
    border-radius: 8px;
}
h3 {
    color: #333;
    border-bottom: 2px solid #007bff;
    padding-bottom: 5px;
}
.input-group {
    margin: 15px 0;
}
label {
    display: block;
    margin-bottom: 8px;
    color: #666;
}
input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}
button {
    background: #28a745;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}
button:hover {
    background: #218838;
}
#result {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
}
.safe { background: #d4edda; color: #155724; }
.warning { background: #fff3cd; color: #856404; }
.danger { background: #f8d7da; color: #721c24; }