main {
    width: 100%;
}

.staff {
    background-color: rgb(235, 235, 235);
    border-radius: 50px;
    box-shadow: -20px -20px 50px rgba(255, 255, 255, 0.75), 20px 20px 50px rgba(0, 0, 0, 0.25);
    display: flex;
    height: 200px;
    margin: 70px auto;
    width: 500px;
    max-width: calc(100% - 20px);
}

.staff_icon {
    margin: 25px 50px;
    width: 150px;
}

.staff_icon img {
    border-radius: 100%;
}

.staff_name {
    margin: auto;
}

.staff_name h1 {
    font-size: 24px;
}

.staff_name h2 {
    color: rgb(179, 145, 240);
    font-size: 20px;
}

.about {
    background-color: rgb(235, 235, 235);
    border-radius: 50px;
    box-shadow: -20px -20px 50px rgba(255, 255, 255, 0.75), 20px 20px 50px rgba(0, 0, 0, 0.25);
    display: flex;
    min-height: 200px;
    margin: 70px auto;
    width: 500px;
    max-width: calc(100% - 20px);
}

.about_memo {
    margin: auto;
    padding: 25px;
    max-width: 150px;
}

.about_list {
    margin: auto;
    padding: 25px;
    max-width: 150px;
}

.about_list table {
    border-collapse: collapse;
}

.about_list tr {
    border-bottom: solid 2px rgb(215, 215, 215);;
}

.about_list th {
    width: 30%;
}

.about_list td {
    width: 70%;
}

.portfolio {
    background-color: rgb(235, 235, 235);
    border-radius: 50px;
    box-shadow: -20px -20px 50px rgba(255, 255, 255, 0.75), 20px 20px 50px rgba(0, 0, 0, 0.25);
    min-height: 200px;
    margin: 70px auto;
    width: 500px;
    max-width: calc(100% - 20px);
}

.portfolio_name {
    margin: 0 25px;
    padding: 25px 0;
}

.portfolio span {
    display: block;
    height: 5px;
    width: calc(100% - 50px);
    margin: auto;
    border-radius: 50px;
    background: linear-gradient(135deg, rgb(179, 145, 240), rgb(255, 169, 108));
}

.portfolio_list {
    margin: 0 25px;
    padding: 25px 0;
}

.portfolio_list ul {
    display: flex;
    flex-wrap: wrap;
}

.portfolio_list li {
    margin: 10px;
    width: calc(100% / 3 - 20px);
}

.portfolio_list img {
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: center;
}

.portfolio_list video {
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: center;
    width: 100%;
}

.material_back {
    height: 100%;
    position: fixed;
    top: 0%;
    width: 100%;
    z-index: -10;
}

.material_back img {
    height: 100%;
    width: auto;
}