body {
    font-family: Arial, sans-serif;
    padding: 0;
    line-height: 1.6;
    background-color: #efe1c4;
    color: #333;
    width: 100%;
}
    header {
        position: relative;
        width: 100vw;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 10px 0;
        background-color: #0073e6;        
        color: #ffffff;
        box-sizing: border-box;
        margin:0;
    }
        header h1 {
            margin: 50px 0 50px 0;
            font-size: 2.5em;
        }
        header p {
            align-items:bottom;
            margin: 0px 0 0;
        }
    footer {
        text-align: center;
        padding: 10px;
        line-height: 0.5;
        background-color: #858585;
        color: white;
        position: fixed;
        bottom: 0;
        margin:0;
        width: 100%;
    }

#summary {
    /*display: inline-block; */
    display: grid;
    grid-template-columns: 30% 70%;
    list-style: none;
    max-width: 800px;
    margin: 20px auto 10px auto;
    padding: 0;
}
    #summary li {
        display: block;
    }

#main_body p {
    border: 0pt;
    margin-top: 0pt;
    padding: 10px 20px;
}

img {
    width: 100%;
    height: auto;
}

/* The floating hints when the mouse hovers over elements */
.floating_hint {
    visibility: hidden; 
    background: #fff; 
    color: #333; 
    border: 1px solid #ccc; 
    border-radius: 4px; 
    padding: 6px 10px; 
    position: absolute; 
    left: 50%; 
    top: 10%; 
    transform: translateX(-50%); 
    z-index: 10; 
    font-size: 1em; 
    box-shadow: 0 2px 8px rgba(0,0,0,0.1); 
    text-align: center;
}
span:hover .floating_hint {
    visibility: visible;
}
.void_line {
    height: 2em;
    list-style-type: none;
    border: none;
    background-color: #efe1c4;
    padding: 0;
    margin: 0;
}