* {
    margin: 0;
    padding: 0;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    color: #A7D129;
    text-align: center;
}

body {
    background-color: black;
    justify-content: center;
    align-items: center;
}

h1 {
    margin-top: 1%;
    font-size: 36px;
}

h2 {
    font-size: 30px;
}

h3 {
    font-size: 22px;
}

hr {
    border-color: #A7D129;
    margin: 2%;
}

div {
    display: flex;
    margin: 2% 2% 2% 2%;
    /* border-style: ridge;
    border-width: 2px;
    border-color: red; */
    justify-content: center;
}

/* ####################-HEADER-#################### */

/* ####################-NAVIGATION-#################### */
a.nav_button:link, a.nav_button:visited {
    display: block;
    width: 10%;
    margin: 5px;
    /* border-style: ridge;
    border-width: 2px;
    border-color: red; */
    padding: 14px;
    background-color: #3E432E;
    font-size: 16px;
    text-decoration: none;
}

a.nav_button:hover {
    display: block;
    width: 10%;
    margin: 5px;
    border-style: ridge;
    border-width: 2px;
    border-color: #616F39;
    padding: 12px;
    background-color: black;
    font-size: 16px;
    text-decoration: none;
}

/* ####################-CONTENT-#################### */

/* +++++++++++++++ TOP LOGO +++++++++++++++ */
img.page_logo {
    display: block;
    margin: 0px auto 2% auto;
}

/* +++++++++++++++ Table of Contents +++++++++++++++ */
#contents_area {
    display: flex;
    margin: 2% 15% 2% 15%;
    /* border-style: ridge;
    border-width: 2px;
    border-color: red; */
    justify-content: left;
}

li.obj {
    background-color: #3E432E;
    font-size: 20px;
    font-weight: bold;
    text-align: left;
    text-decoration: none;
}

div.subjects_area {
    margin: 0;
    /* border-style: ridge;
    border-width: 2px;
    border-color: red; */
    padding: 0;
    justify-content: left;
}

div.subjects_area div {
    margin: 0 10px 0 3%;
}

li.non-active_sub {
    color: lightgray;
    font-size: 16px;
    text-align: left;
}

a.active_sub:link, :visited {
    color: #A7D129;
    font-size: 16px;
    text-align: left;
    text-decoration: underline;
}

a.active_sub:hover {
    background-color: #3E432E;
    color: #A7D129;
    font-size: 16px;
    text-align: left;
    text-decoration: underline;
}

/* +++++++++++++++ SUBJECT AREAS +++++++++++++++ */
section.section_area {
    width: 95%;
    /* border-style: ridge;
    border-width: 2px;
    border-color: red; */
}

h2.section_header {
    margin-bottom: 1%;
    background-color: #3E432E;
    font-size: 20px;
}

div.subject_area {
    display: block;
    margin: 2% 6% 0 6%;
    border-style: ridge;
    border-width: 2px;
    border-color: #616F39;
    padding: 1%;
}

h3.subject_header {
    font-size: 20px;
    text-align: center;
    /* text-decoration: underline; */
}

div.subject_area p {
    text-align: center;
}

div.subject_area li {
    text-align: left;
}

.details_heading {
    margin: 5px 0 5px 0;
    color: lightgray;
    text-decoration: underline;
}

li.details {
    color: lightgray;
}

li.details u {
    color: lightgray;
}

/* ####################-FOOTER-#################### */
p.footer {
    margin: 2% 2% 2% 2%;
    padding-left: 5px;
    font-size: 14px;
    text-align: left;
    background-color: #3E432E;
}