body {
    background-color: #222831;
    text-align: center;
}

header {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    width: 100%;
    height: 50px;
    line-height: 50px;
    left: 0px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 300ms;
    background-color: #313842;
}

header:hover {
    background-color: #5b6a80;
    box-shadow: 0px 0px 4px #5b6a80;
}

#footer {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    position: fixed;
    width: 100%;
    height: auto;
    left: 0px;
    bottom: 0px;
    transition: all 300ms;
    background-color: #313842;
}

h1 {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    position: absolute;
    text-align: left;
    left: 15px;
    font-size: 150%;
}

h2 {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    text-align: center;
    position: relative;
    left: 15px;
}

a {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    text-decoration: none;
    font-size: 20px;
    text-align: center;
}

p {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    text-decoration: none;
    font-size: 20px;
}

table.center_table {
    margin-left: auto;
    margin-right: auto;
}

th,
td {
    font-family: Tahoma, Calibri, Verdana, Geneva, sans-serif;
    color: #F1F3F1;
    padding: 1em;
    border: 1px solid rgb(255, 255, 255);
    border-radius: 10px 100px / 120px;
}

#login,
#signup {
    position: relative;
    width: 150px;
    padding: 1px;
    border-radius: 10px 100px / 120px;
    text-align: match-parent;
    text-decoration: none;
    display: inline-block;
}

.signupLine a {
    color: #fff8cf;
    text-decoration: none;
}

.signupLine a:hover {
    text-decoration: underline;
}

#registro {
    position: sticky;
    display: block;
}