:root{
    --c_background: #FFFFFF;
    --c_wrapper: #FFFFFF;
    --c_header: #D9D9D9;
    --c_text_bright: #D9D9D9;
    --c_dark_grey: #999999;
    --c_text_dark: black;
    --c_accent1: #3C6E71;
    --c_accent2: #284B63;
    color: var(--c_text);
    font-size: 62.5%;
}

/*general site attributes*/

body {
    background-color: var(--c_background);
}

main {
    width: 100%;
    margin-top: 70px;
}

a, button{
    cursor: pointer;
}

/*header*/

.header_main{
    position: fixed;
    top: 0;
    width: 100%;
    height: 60px;
    background-color: var(--c_header);
    display: flex;
    justify-content: space-around;
    z-index: 1000;
}

.header_main-logo{
    width: 100px;
    height: 100%;
    padding: 0 20px;
}

.header_main-logo img{
    padding: 10% 0;
    height: 100%;
    align-self: center;
}

.header_nav{
    flex-basis: 150 px;
    flex-grow: 3;
    height: 100%;
}

.header_nav ul{
    display: flex;
    justify-content: space-around;
}

.header_nav ul li{
    width: 60px;
    display: inline;
}

.header_nav ul li a{
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    color: var(--c_accent2);
    font-size: 2rem;
    line-height: 60px;
    display: block;
    height: 100%;
}

.header_nav ul li a:hover{
    color: var(--c_accent1);
    font-weight: 550;
}

/*main*/

.wrapper_main {
    min-width: 800px;
    width: 80vw;
    max-width: 1100px;
    margin: 0 auto;
    background-color: var(--c_wrapper);
    display: flex;
    justify-content: center;
    flex-direction: column; /* Add this line */
}

.wrapper_footer{
    width: 1100px;
    margin: 0 auto 0 auto;
    color: var(--c_text_dark);
}

/* formatting back the form elements */

textarea, input, select {
    border: 1px solid var(--c_text_dark);
    font-size: 1.6rem;
    width: 40ch;
    padding: 1rem;
    border-radius: .5rem;
    margin: .5rem;
}

textarea:focus, input:focus {
    border: 1px solid var(--c_accent1);
    outline: 2px solid var(--c_accent1);
}

input[type="checkbox"] {
    appearance: checkbox;
    width: unset;
}

button{
    background-color: var(--c_accent1);
    padding: 1rem;
    border-radius: 5px;
    color: var(--c_header);
}

button.add:hover,
button.search:hover,
button.submit:hover,
button.sciebo-button:hover,
button.add_iteration:hover{
    background-color: var(--c_accent2);
}

/*text*/

h2 {
    font-size: 2.2rem;
    font-weight: bold;
    text-align: left;
    color: var(--c_accent2);
    padding-left: 2rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

h3 {
    font-size: 1.8rem;
    text-align: left;
    color: var(--c_accent2);
    padding-left: 2rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.warning {
    color: red;
    font-size: 1.6rem;
    text-align: left;
    padding-left: 2rem;
    padding-top: 3rem;
}