body {
    margin: 0px;
    padding: 0px;
    font-family: sans-serif;
    background-color: #F8F9FA;
}

header {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    background-color: lightskyblue;
    padding-inline: 50px;
}

#header-main-menu {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 50px;
}

header a {
    text-decoration: none;
    color: black;
}

header h1 {
    font-weight: bold;
    font-size: xx-large;
    margin: 10px;
}

header #btn-logout {
    background-color: #D93025;
    color: white;
}

header #btn-logout:hover {
    background-color: red;
}

#header-main-menu > div {
    font-size: large;
    border: 2px solid black;
    border-radius: 3px;
    padding: 5px 10px;
    background-color: lightgray;
}


main {
    padding: 15px;
}

ul li {
    margin-bottom: 10px;
}

input, select, button {
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 3px;
    background: #fff;
    font-size: large;
}

.solid-gray-block {
    border: 3px solid black;
    background-color: lightgray;
    padding: 10px;
}

button:hover {
    background: #f0f0f0;
}