body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    overflow: hidden;
}

header {
    background-color: #333;
    color: white;
    padding: 15px 0;
    text-align: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

.background-container {
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.7);
    transition: background-image 1s ease-in-out;
}

.overlay-text {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 5px;
}