div {
    width: 830px;
    margin: auto;
}

.blockbleu {
    width: 800px;
    height: 150px;
    background: #093844;
    margin-left: auto;
    margin-right: auto;
}

.blockmenu {
    display: flex;


}

nav {
    width: 166px;
    height: 39px;
    margin-bottom: 15px;
    margin-top: 15px
}

.btn1 {
    background: #f9f89b;
}

.btn2 {
    background: #f1f084;
}

.btn3 {
    background: #e6e573;
}

.btn4 {
    background: #dedd5e;
}

.btn5 {
    background: #d2d155;
}


.blockvert {
    display: flex;
    width: 880px;
}

.block1 {
    width: 550px;
    height: 500px;
    background: #80a894;
}

.block2 {
    width: 250px;
    height: 500px;
    background: #52736b;
    margin-left: 30px;
}

.blockmauve {
    width: 700px;
    height: 100px;
    background: #532736;
    margin-top: 15px;
    margin-left: auto;
    margin-right: auto;
}