html {
    background-color: rgb(200, 200, 200);
}

* {
    margin: 0;
    padding: 0;
}

/* MENU */

header {
    height: 5.5em;
}

.menu {
    background-color: rgb(100, 100, 100);
    position: fixed;
    display: flex;
    justify-content: left;
    align-content: center;
    width: 100%;
    height: 5.5em; /* same as the height of header */
    z-index: 1;
}

.logo {
    height: 100%;
}

.menu a {
    margin-left: 0;
}

.menu ul li {
    list-style: none;
    display: inline-block;
    line-height: 5.5em; /* same as the height of header */
}

.menu > ul > li > a {
    display: block;
    text-decoration: none;
    font-size: 1.5em;
    font-family: Arial, Helvetica, sans-serif;
    color: rgb(30, 30, 30);
    padding: 0 1em;
}

.brand-title {
    display: none;
    position: absolute;
    align-self: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.4rem;
    width: 100%;
    text-align: center;
    z-index: -1;
}

.toggle-button {
    position: absolute;
    align-self: center;
    right: 1rem;
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
}

.toggle-button .bar {
    height: 3px;
    width: 100%;
    background-color: white;
    border-radius: 10px;
}

.mobile-menu {
    background-color: aliceblue; /* rgb(240, 248, 255) */
    position: relative;
    width: 70vw;
    height: 100vh;
    flex-direction: column;
    z-index: 1;
    display: none;
}

.mobile-menu .beginner-tutorial-overlay {
    position: fixed;
    top: 0;
    right: 0;
    width: 30vw;
    height: 100vh;
    background-color: rgb(0, 0, 0);
    opacity: 0.7;
    display: none;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu .object {
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgb(150, 150, 150);
    width: 100%;
}

.mobile-menu .object1 {
    position: relative;
    line-height: 3rem;
}

.mobile-menu .object2 {
    line-height: 2.5rem;
}

.mobile-menu #beginner-tutorial-mobile #arrow {
    position: absolute;
    height: 15%;
    right: 1rem;
    z-index: -1;
}

.mobile-menu a {
    text-decoration: none;
    color: black;
    width: 100%;
    height: 100%;
}

.mobile-menu .object1 a {
    padding-left: 1rem;
    font-size: 1.3rem;
}

.mobile-menu .object2 a {
    background-color: rgb(225, 233, 240);
    padding-left: 2rem;
    font-size: 1.2rem;
}

.mobile-menu #beginner-tutorial-list {
    display: none;
    flex-direction: column;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu.active .beginner-tutorial-overlay {
    display: block;
}

.mobile-menu #beginner-tutorial-list.active {
    display: flex;
}

/* DROPDOWN */

.dropdown {
    position: relative;
    z-index: 0;
}

.dropdown-menu {
    position: absolute;
    display: flex;
    flex-direction: column;
    left: 15%;
    top: calc(100% - .25rem);
    background-color: white;
    padding: .25rem;
    border-radius: .25rem;
    box-shadow: 0 2px 5px 0 rgba(0, 0, 0, .1);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 150ms ease-in-out, transform 150ms ease-in-out;
    transition-delay: 100ms;
}

.dropdown:hover .dropdown-menu {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.dropdown-menu li {
    display: block;
    margin: 0;
    padding: 0;
}

.dropdown-menu li a {
    display: block;
    text-decoration: none;
    line-height: 3em;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.1rem;
    color: rgb(30, 30, 30);
    padding: 0 1em;
    border-radius: .25rem;
}

#first-block {
    background-color: rgb(240, 240, 240);
}

#cpdf-edge {
    background-color: rgb(240, 240, 240);
}