* {
    background-color: darkslategray;
    color: white;
}

a:hover {
    color: green;
}

article {
    overflow: auto;
    width: 100%;
}

article * {
    background-color: midnightblue;
    margin: 2%;
}

/*-----------------sections------------------*/
#numpadNotation, #botones, #inputs {
    border: 2px dashed #837913;
    border-radius: 15px;
    background-color: midnightblue;
    overflow: auto;
    width: 500px;
}

/*-----------------imágenes------------------*/
figure {
    margin: 0px;
    border: 2px solid black;
    background-color: purple;
}

img {
    width: 100%;
    margin: 0px;
}

figcaption {
    text-align: center;
    font-style: italic;
    background-color: purple;
}

header {
    margin-left: 150px;
    padding-top: 40px;
    width: 100%;
}

#numpad_img, #GBFV_botones, #AirDasher_botones, #Smash_botones, #GG_botones {
    float: right;
    width: 40%;
}

/*-----------------header------------------*/
#header_menu * {
    background-color: purple;
    margin: 5px;
}

#header_menu {
    font-size: larger;
    position: fixed;
    margin: 0px;
    top: 0px;
    left: 0px;
    width: 100%;
    text-align: center;
    background-color: purple;
    border-top: 2px solid black;
    border-bottom: 2px solid black;
}

#header_menu li {
    display: inline;
    margin: 5%;
}

/*-----------------nav------------------*/
#nav_botones li, #nav_inputs li {
    list-style-type: square;
    overflow: auto;
}

/*-----------------footer------------------*/
footer * {
    background-color: purple;
    margin: 5px;
}

footer {
    position: fixed;
    margin: 0px;
    bottom: 0px;
    left: 0px;
    width: 100%;
    text-align: center;
    background-color: purple;
    border-top: 2px solid black;
    border-bottom: 2px solid black;
}

footer li {
    display: inline;
    margin: 5%;
}