.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    background-color: #0b3d5f;
    color: #fff;
}

.nav-links a {
    color: #fff;
}

.nav-links {
    list-style-type: none;
}

.menu {
    display: flex;
    gap: 1em;
    font-size: 18px;
}

.menu li:hover {
    background-color: #427496;
    border-radius: 5px;
    transition: 0.3s ease;
}

.menu li {
    padding: 5px 14px;
}

.subcategory {
    position: relative;
}

.dropdown {
    background-color: rgb(76, 128, 163);
    padding: 1em 0;
    position: absolute;
    display: none;
    border-radius: 8px;
    top: 35px;
}

.dropdown li+li {
    margin-top: 10px;
}

.dropdown li {
    padding: 0.5em 1em;
    width: 8em;
    text-align: left;
}

.dropdown li:hover {
    background-color: #5083a5;
}

.subcategory:hover .dropdown {
    display: block;
}

.menu li a {
    text-decoration: none;
}

.arrow {
    border: solid white;
    border-width: 0 3px 3px 0;
    display: inline-block;
    padding: 3px;
    margin-bottom: 3px;
    margin-left: 2px;
}

.down {
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
}

body {
    background-repeat: no-repeat;
    background-size: cover;
    height: 100vh;
}

h1 {
    text-align: left;
    color: #1a695c;
    word-wrap: break-word;
    background-color: rgb(164, 198, 221);
    backface-visibility: hidden;
}

ul {
    color: rgb(6, 134, 91);
}

.left {
    text-align: justify;
    width: 55%;
    float: left;

}

.right {
    text-align: right;
}

.btn {
    width: 150px;
    height: 50px;
    border: none;
    color: rgb(11, 52, 80);
    border-radius: 4px;
    transition: ease-out 0.3s;
    font-size: 1.5rem;
    outline: none;
    border: 3px solid rgb(23, 87, 112);
    position: relative;
    z-index: 1;

}

.btn:hover {
    color: #fff;
    cursor: pointer;
}

.btn::before {
    transition: 0.5s all ease;
    position: absolute;
    top: 0;
    left: 50%;
    right: 50%;
    bottom: 0;
    opacity: 0;
    content: "";
    background-color: #5083a5;

}

.btn:hover:before {
    transition: 0.5s all ease;
    left: 0;
    right: 0;
    opacity: 1;
    z-index: -1;

}