* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f5f5f5;
}

.container {
    text-align: center;
    padding: 20px;
}

h1 {
    margin-bottom: 30px;
    color: #333;
}

.result {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    margin: 40px 0;
    min-height: 50px;
}

.start-button {
    padding: 15px 40px;
    font-size: 18px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.start-button:hover {
    background-color: #45a049;
}

.start-button:active {
    background-color: #3d8b40;
}