* {
    box-sizing: border-box;
}

body {
    padding: 0;
    margin: 0;
}

a {
    text-decoration: none;
}

.main-block {
    width: 800px;
    height: 1280px;
    background: #CCC;
    display: flex;
    flex-direction: column;
}

.main-block.with-side-menu {
    flex-direction: row;
}


.green-box {
    position: relative;
    padding: 16px;
    background: #0b2d27CC;
    color: #e5c68c;
}

.green-box:before {
    content: "";
    position: absolute;
    width: calc(100% - 32px);
    height: calc(100% - 32px);
    top: 15px;
    left: 15px;
    border: 1px solid #e5c68c;
}

.side-menu {
    width: 100px;
    background: #0b2d27;
    display: flex;
    flex-direction: column;
}

.side-menu-list {
    height: 100%;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.side-menu-item {
    position: relative;
    height: 120px;
    border: 2px solid #e5c68c;
}

.side-menu-item a {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 60px;
    bottom: -2px;
    left: 58px;
    text-align: center;
    transform: rotate(-90deg);
    transform-origin: bottom left;
    color: #e5c68c;
}

.home-button {
    text-align: center;
    font-size: 40px;
    padding: 20px;
}

.main-content {
    width: 700px;
    background: #001210;
}