header {
    width: 100%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    margin-bottom: 20px;
}
button {
    width: 95%;
    max-width: 500px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    height: 60px;
    text-align: center;
    margin: 5px;
    background-color: rgb(146, 199, 245);
    border-color: rgb(146, 199, 245);
    border-radius: 0px;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    font-size: 16px;
    color: black;
}
form {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    width: 100%;
}
#additional_materials {
    display: flex;
    align-items: center;
    flex-direction: column;
    width: 100%;
}
label {
    width: 95%;
    height: 30px;
    text-align: center;
    font-size: 16px;
    max-width: 500px;
}
input {
    width: 95%;
    height: 30px;
    text-align: center;
    max-width: 500px;
    border-radius: 0px;
    border-width: 1px;
    border-color: rgb(146, 199, 245);
    font-size: 16px;
}
select {
    width: 95%;
    height: 30px;
    text-align: center;
    max-width: 500px;
    border-radius: 0px;
    border-color: rgb(146, 199, 245);
    border-width: 1px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    color: black;
}
option {
    height: 30px;
    text-align: center;
    max-width: 500px;
    border-radius: 0px;
    border-color: rgb(146, 199, 245);
    border-width: 1px;
    color: black;
}
li {
    font-size: 18px;
}
textarea {
    width: 95%;
    height: 60px;
    text-align: center;
    max-width: 500px;
    border-radius: 0px;
    border-color: rgb(146, 199, 245);
    border-width: 1px;
    color: black;
    font-size: 16px;
}
span {
    margin-bottom: 20px;
}
.button_form {
    width: 95%;
    max-width: 500px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    height: 60px;
    text-align: center;
    margin: 5px;
    background-color: rgb(146, 199, 245);
    border-color: rgb(146, 199, 245);
    border-radius: 0px;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    font-size: 16px;
    color: black;
}
.button-menu {
    width: 95%;
    max-width: 245px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    height: 45px;
    text-align: center;
    margin: 5px;
    margin-bottom: 20;
    background-color: rgb(146, 199, 245);
    border-color: rgb(146, 199, 245);
    border-radius: 0px;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    font-size: 14px;
    color: black;
}
.flex_column {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
}
.form_input {
    margin-bottom: 20px;
}