::-webkit-scrollbar-thumb {
    background: #aca9bb;
}

::-webkit-scrollbar-thumb:hover {
    background: #aca9bb;
}

html,
body {
    width: 100vw;
    height: 100vh;
    font-family: "Arial", sans-serif;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

header {
    width: 100vw;
    background-color: #fff;
    color: #003399;
    position: fixed;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 3rem;
    padding: 1rem;
}

.nav-links {
    padding: 0;
    list-style: none;
    display: flex;
    gap: 1rem;
}

.nav-links a {
    transition: 0.4s;
    color: #003399;
    text-decoration: none;
}

.nav-links a:hover {
    transition: 0.4s;
    color: #0272ef;
}

.presentation {
    background-color: #000;
    color: #fff;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.presentation-content p {
    padding: 0.5rem 0;
}

.btn {
    transition: 0.4s !important;
    background-color: #003399;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 2rem;
    text-decoration: none;
    font-size: 1rem;
    display: flex;
    justify-content: center;
}

.btn:hover {
    transition: 0.4s !important;
    background-color: #0272ef;
    cursor: pointer;
}

#about-us,
#services,
#contact {
    padding: 7rem 0;
    text-align: center;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #003399;
}

.items-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    color: #fff;
}

.item {
    width: 100%;
    background-color: #000;
    padding: 2rem;
}

.contact-container {
    padding: 1rem;
    background-color: #000;
    color: #fff;
}

.contact-container ul {
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.contact-container ul li {
    list-style: none;
}

.social-nw-icon {
    transition: 0.3s;
    filter: invert(0);
    width: 2rem;
}

.social-nw-icon:hover {
    transition: 0.3s;
    filter: invert(49%) sepia(0%) saturate(0%) hue-rotate(319deg) brightness(86%) contrast(91%);
}

footer {
    background-color: #000;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

@media (max-width: 550px) {
    nav {
        flex-direction: column;
    }
}