* {
    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 Content */
main {
    max-width: 80%;
    margin: 0 auto 8% auto;
    text-align: left;
}

/* Page title: PROJECTS*/
main h1 {
    font-size: 2vw;
    margin-bottom: 5%;
}

/* project title: JS calculator*/
main h3 {
    font-size: 2vw;
    margin: 1% auto;
    color: white;
}
/* Calculator Section */
#input {
    margin-top: 3%;
    padding: 3%;
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    background-color: red;
}

/* Inputs */
#input input[type="text"] {  /* source from https://www.w3schools.com/css/css_form.asp */
    width: 40%;
    padding: 2vw;
    margin: 2% 1%;
    font-size: 2vw;
    background-color: white;
    color: black;
    border: 1vw solid black;
}

/* Buttons container */
#buttons {
    margin-top: 2%;
    text-align: center;
    background-color: green;
}

/* Buttons */
#buttons button {
    padding: 1.2vw 2.5vw;
    margin: 2% 1%;
    font-size: 1.1vw;
    background-color: white;
    color: black;
}

#buttons button:hover {
    background-color: black;
    color: white;
}

/* Output */
#output {
    margin-top: 3%;
    font-size: 1.5vw;
    min-height: 3vw;
    padding-top: 2%;
}

footer {
    text-align: center;
    font-size: 1vw;
    margin-top: 5%;
}
@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 h3 {
        font-size: 3.5vw;
    }

    #input {
        max-width: 95%;
        padding: 5%;
        background-color: red;
    }

    #input input[type="text"] {
        width: 80%;
        padding: 3vw;
        margin: 3% 1%;
        font-size: 3.5vw;
        border: 0.5vw solid black;
        border-radius: 1vw;
    }

    #buttons {
        max-width: 95%;
        padding: 4%;
        background-color: green; /* keep same bg color */
        margin-top: 4%;
    }

    #buttons button {
        padding: 3vw 5vw;
        margin: 3% 2%;
        font-size: 3vw;
        border-radius: 1vw;
    }

    #output {
        font-size: 3.5vw;
        min-height: 5vw;
        padding-top: 4%;
    }

    footer {
        font-size: 2.5vw;
        margin-top: 8%;
    }
}