body, html {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    background-image: url(../public/images/grass.webp);
    background-size: auto;
    background-repeat: no-repeat;
    font: 71%/1.5 Verdana, Sans-Serif;
}

.numpad-container {
    text-align: center;
}

#pinInput {
    width: 200px;
    height: 50px;
    margin-bottom: 20px;
    font-size: 20px;
    border-radius: 8px;
    border: none;
}

.numpad {
    display: inline-block;
    vertical-align: top;
}

.row {
    margin-bottom: 10px;
}

.num-btn {
    float: left;  
        margin: 0 5px 5px 0;  
        width: 60px;  
        height: 60px;  
        font-size: 24px;
        line-height: 60px;  
        text-align: center;  
        background: #fff;  
        border: 1px solid #f9f9f9;  
        border-radius: 5px;
}

.num-btn:hover {
    background-color: #f0f0f0;
}

.clear {
    color: #EE4E4E;
}

.ok {
    color: #006769;
}