html {
    background-color: firebrick;
    font-family: sans-serif;
    color: whitesmoke;
}

body {
    margin: 0px;
}

main {
    margin: 20px;
}

header {
    background-color: black;
}

a:link {
    color: whitesmoke;
}

a:visited {
    color: gray;
}

.nav_bar {
    display: flex;
}

.up_menu {
    list-style: none;
    padding: 0px;
    margin: 0px;
    display: inline-flex
}

.up_menu a {
    text-align: center;
    text-decoration: none;
    padding: 15px;
    display: block;
}

.Logo {
    background-color: whitesmoke;
    width: auto;
    height: 50px;
}

figure img {
    max-width: 300px;
    height: auto;
}

h1 {
    margin-left: 35px;
}

.dos_columnas {
    outline-style: solid;
    outline-color: whitesmoke;
    border-radius: 10px;
    background-color: black;
    display: flex;
    gap: 20px;
    grid-template-columns: 1fr 1fr;
    justify-items: left;
    align-items: center;
}

h2 {
    margin-left: 35px;
}

h3 {
    margin-left: 35px;
}

.tres_columnas {
    outline-style: solid;
    outline-color: whitesmoke;
    border-radius: 10px;
    background-color: black;
    display: flex;
    gap: 20px;
    grid-template-columns: 1fr 1fr 1fr;
}

.en-curso {
    outline-style: solid;
    outline-color: whitesmoke;
    border-radius: 10px;
    background-color: black;
    display: block;
}

.foot-nav ul {
    list-style: none;
    outline-style: solid;
    outline-color: whitesmoke;
    border-radius: 10px;
    background-color: black;
    display: inline-flex;
}

.foot-nav a {
    text-align: center;
    text-decoration: none;
    padding: 15px;
    display: block;
}

footer {
    margin: 30px;
    font-size: 9pt;
    font-weight: bold;
}