* {
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
    background-color: black;
    color: white;
    padding: 3%;
}

header {
    text-align: center;
    margin-bottom: 5%;
}

header h1 {
    font-size: 2.5vw;
    margin-bottom: 1%;
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 5%;
    margin-top: 2%;
}

nav a {
    text-decoration: none;
    color: white;
    font-size: 1.2vw;
}


/* Nav Hover Effects from stack overflow */
#nav-red:hover {
    color: red;
    font-weight: bold;
}
#nav-orange:hover {
    color: orange;
    font-weight: bold;
}
#nav-yellow:hover {
    color: yellow;
    font-weight: bold;
}
#nav-green:hover {
    color: green;
    font-weight: bold;
}
#nav-blue:hover {
    color: blue;
    font-weight: bold;
}
#nav-indigo:hover {
    color: indigo;
    font-weight: bold;
}

/* Main */
main {
    max-width: 80%;
    margin: 0 auto 8% auto;
}

main h1 {
    font-size: 2vw;
    margin-bottom: 1%;
    margin-left: 5%;
    text-align: left;
}

/* Certificate Images */
main img {
    display: block;
    margin: 5% auto;
    max-width: 40%;
    height: auto;
    border: 2px solid white;
}

/* Footer */
footer {
    text-align: center;
    font-size: 1vw;
    margin-top: 5%;
}

/* Responsive */
@media screen and (max-width: 1000px) {
    main, nav {
        width: 100%;
    }

    nav ul {
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
    }

    nav a {
        font-size: 2vw;
    }

    main h1 {
        font-size: 5vw;
        text-align: center;
    }

    main img {
        max-width: 100%;
    }

    footer {
        font-size: 2.2vw;
    }
}