body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f4f8;
    color: #4a4a4a; 
    text-align: center;
    margin: 0;
    padding: 20px;
}

h1 {
    color: #34495e;
    margin-bottom: 20px;
    font-size: 2.5em; 
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1); 
}

p {
    font-size: 18px;
    line-height: 1.6; 
}

a {
    text-decoration: none;
    color: #2980b9;
    font-weight: bold;
    transition: color 0.3s; 
}

a:hover {
    color: #3498db;
    text-decoration: underline;
    }

form {
    margin: 20px 0;
    background-color: #ffffff; 
    padding: 20px; 
    border-radius: 10px; 
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1); 
}

input[type="number"] {
    padding: 10px;
    font-size: 16px;
    width: 100px;
    border: 2px solid #2980b9;
    border-radius: 5px;
    transition: border-color 0.3s;
}

input[type="number"]:focus {
    border-color: #3498db; 
    outline: none; 
}

button {
    padding: 10px 15px;
    font-size: 16px;
    background-color: #2980b9;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s; 
}

button:hover {
    background-color: #3498db;
    transform: translateY(-2px); 
}

h2 {
    color: #e74c3c;
    margin-top: 20px;
    font-size: 2em; 
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1); 
}