body {

    font-family: Arial;
    color: #333;
    padding-top: 200px; /* Adjusted to prevent content from being hidden under the fixed header */

}

header {

    background: rgba(217, 217, 217, 0.9);
    width: 100%;
    position: fixed; /* Fixed the header at the top of the page */
    top: 0;
    height: 160px;

}

header h1 {

    text-align: center;
}

p {
    line-height: 1.5em;
}

img {
    display: block;
    max-width: 100%;

}

section {
    width: 95%;
    margin: 0 auto 150px auto;
    padding: 25px;
    box-shadow: 0px 0px 8px 1px rgba(0, 0, 0, 0.75);

}

/* Navigation Styles */
header nav {
    width: 95%;
    margin: auto;

}

header nav ul {
    display: flex;
    list-style-type: none;
    margin: 0;
    padding: 0;

}

header nav ul li {
    width: 20%;
    box-sizing: border-box;
    border-left: 2px solid #666;

}

header nav ul li:first-of-type {
    border-left: none;
}

header nav ul li a {
    text-decoration: none;
    display: block;
    color: #fff;
    text-transform: uppercase;
    font-weight: bold;
    padding: 10px;
    background: #9C9C9C;
    white-space: nowrap;
    overflow: hidden;
    text-align: center;
    text-overflow: ellipsis;

}

.selected {

    background: rgba(254, 0, 187, 1.00); /* Highlight the selected navigation link */
    transition: all 1s;

}

/* Responsive Styles */

@media only screen and (min-width: 700px) {

    /* First Section Styles */
    #first article {
        display: flex;
        align-items: flex-start;

    }

    #first article img {
        margin-left: 25px;

    }

    /* Second Section Styles */
    #second div,
    #fifth div {
        display: flex;
        justify-content: space-between;

    }

    #second article {
        width: 30%;

    }

    /* Third Section Styles */
    #third article {
        display: flex;
        align-items: flex-start;

    }

    #third article img {
        margin-right: 25px;

    }

    /* Fifth Section Styles */
    #fifth article {
        width: 47%;

    }

    #fifth {
        margin-bottom: 500px;

    }

}

@media only screen and (min-width: 1000px) {

    section,
    header nav {
        width: 960px;
    }
    
}