body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1d1d1d; /* Dark mode background */
    color: #ffffff;
}

header {
    background-color: #333333;
    color: #ffffff;
    padding: 20px 0;
    text-align: center;
    position: relative;
}

nav {
    position: relative;
}

.hamburger {
    display: inline-block;
    cursor: pointer;
    font-size: 24px;
    color: #ffffff;
    position: absolute;
    right: 20px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul.active {
    display: block;
}

main {
    padding: 20px;
}

h2 {
    color: #4a90e2;
    animation: fadeIn 0.5s ease-in;
    opacity: 0;
    animation-fill-mode: forwards;
}

section {
    opacity: 0;
    animation: slideIn 0.5s ease forwards;
}

footer {
    text-align: center;
    padding: 15px;
    background: #333333;
    color: #ffffff;
}

button {
    background-color: #4a90e2;
    color: #ffffff;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    margin: 10px 0;
    border-radius: 5px;
}

button:hover {
    background-color: #357ab8;
}

hr {
    border: 1px solid #444444;
    margin: 20px 0;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #4a90e2;
    }

    nav ul li {
        display: block;
        margin: 10px 0;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: inline;
    }

    nav ul {
        display: none;
    }

    nav ul.active {
        display: block;
    }
}

#hero {
    background-color: #2a2a2a;
    padding: 40px;
    text-align: center;
}

#ai-assistant, #premium-modules, #global-community, #future-careers {
    background: #333333;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    transition: background 0.3s ease;
}

#ai-assistant:hover, #premium-modules:hover, #global-community:hover, #future-careers:hover {
    background: #4a90e2;
}