body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background-color: #f5f5f5;
}

h1 {
    text-align: center;
    color: #333;
}

.example {
    margin: 30px 0;
    padding: 20px;
    background-color: white;
    border-radius: 5px;
}

h2 {
    color: #666;
    margin-bottom: 15px;
}

.flex-container {
    display: flex;
    gap: 10px;
}

.flex-container-vertical {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.flex-space {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.box {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
    text-align: center;
    border-radius: 5px;
    flex: 1;
}