body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0;
}

.container {
    width: 84%;
    align-self: center;
    text-align: center;
}

.rectangle {
    background: white;
    width: 100%;
    margin: 10px 0;
    padding: 30px;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.rectangle.top {
    font-size: 3em;
    background: white;
    width: 100%;
    margin: 10px 0 10px 0;
    padding: 30px;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.rectangle.result {
    background: white;
    width: 100%;
    _height: 200px;
    min-height: 100px;
    vertical-align: middle;
    margin: 10px 0px 10px 0;
    padding: 30px;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
.rectangle.form {
    display: flex;
    width: 100%;
    vertical-align: middle;
    margin: 10px 0px 10px 0;
    padding: 30px;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    background: #e0e0c0;
    justify-content: space-evenly;

}


.rectangle.bottom {
    background: white;
    width: 100%;
    margin: 10px 0 10px 0;
    padding: 30px;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.menu {
    display: flex;
    justify-content: space-around;
    background: #e0e0c0;
}

.menu a {
    text-decoration: none;
    color: black;
}

.hr {
    margin: 20px 0;
    border: 0;
    border-top: 3px solid #e0e0c0;
    width: 100%;
    horiz-align: center;
    align-content: center;

}