:root {
    --bg-color: hsl(0, 0%, 95%);
    --font-color: hsl(0, 0%, 20%);
    --bg-overlay: hsl(0, 0%, 100%);

    --color-1: hsl(0, 50%, 45%);
    --color-2: hsl(60, 50%, 45%);
    --color-3: hsl(113, 50%, 45%);
    --color-4: hsl(216, 50%, 45%);
    --color-5: hsl(298, 50%, 45%);

    --font-size: 4vh;
    --corner-radius: 5px;
    --box-shaow-color: hsl(0, 0%, 50%);
}

* {
    box-sizing: border-box;
    touch-action: manipulation;
    /* disable double tap to zoom */
}

html {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    margin: 0;
    padding: 0;
    /* mobile viewport bug fix */
    height: -webkit-fill-available;
}

body {
    background-color: var(--bg-color);
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    margin: 0;
    padding: 0;
    color: var(--font-color);
    font-size: 100%;
    display: flex;
    justify-content: center;
    font-size: var(--font-size);
    font-family: "Lilita One", sans-serif;
    font-weight: 400;
    min-height: 100vh;
    /* mobile viewport bug fix */
    min-height: -webkit-fill-available;
}

main {
    width: 100vw;
    padding: 0 3vw;
    max-width: 960px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-transform: uppercase;
}

h1 {
    text-align: center;
    margin: 0;
    font-size: clamp(5rem, 12vmin, 8rem);
}

h2 {
    text-align: center;
    margin: 0;
    font-size: 2rem;
    margin: 0 0 1.5rem 0;
}

h3 {
    margin: 0;
    font-size: 1.5rem;
    margin: 1.5rem 0 0 0;
}

p {
    font-size: 1.2rem;
    margin: 0.5rem 0 0 0;
}

strong {
    font-weight: 600;
}

.hidden {
    display: none;
}

/*
-------------------------------------------------------------------
Word List
-------------------------------------------------------------------
*/

main ol {
    list-style: none;
    counter-reset: words;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    flex: 1 0 auto;
}

main ol li {
    counter-increment: words;
    background-color: hsl(0, 0%, 100%);
    position: relative;
    border: 3px solid black;
    margin: 2vmin 0 2vmin 10vh;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--corner-radius);
    height: 7vh;
}

main ol li::before {
    content: counter(words);
    border: 3px solid black;
    border-radius: 50%;
    background-color: hsl(0, 0%, 100%);
    position: absolute;
    left: -10vh;
    width: 7vh;
    height: 7vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--font-size);
}

main ol li:nth-of-type(1) {
    border-color: var(--color-1);
}

main ol li:nth-of-type(1)::before {
    border-color: var(--color-1);
}

main ol li:nth-of-type(2) {
    border-color: var(--color-2);
}

main ol li:nth-of-type(2)::before {
    border-color: var(--color-2);
}

main ol li:nth-of-type(3) {
    border-color: var(--color-3);
}

main ol li:nth-of-type(3)::before {
    border-color: var(--color-3);
}

main ol li:nth-of-type(4) {
    border-color: var(--color-4);
}

ol li:nth-of-type(4)::before {
    border-color: var(--color-4);
}

main ol li:nth-of-type(5) {
    border-color: var(--color-5);
}

main ol li:nth-of-type(5)::before {
    border-color: var(--color-5);
}

main ol div {
    width: 100%;
    height: 100%;
    overflow: hidden;
    padding: 0 1vmin;
    display: flex;
    flex-direction: column;
    justify-content: start;
    align-items: center;
}

main span {
    display: flex;
    align-items: center;
    flex: 0 0 100%;
    height: 100%;
}

main .animate {
    animation: slideUp 0.25s;
}

@keyframes slideUp {
    0% {
        transform: translateY(0%);
    }

    100% {
        transform: translateY(-100%);
    }
}

/*
-------------------------------------------------------------------
Navigation Buttons
-------------------------------------------------------------------
*/

nav {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 8vh;
    margin: 2vh 0 4vh 0;
    gap: 3vmin;
}

button {
    font-family: "Lilita One", sans-serif;
    text-transform: uppercase;
    font-size: var(--font-size);
    border: 3px solid black;
    border-radius: 999px;
    background-color: hsl(0, 0%, 100%);
    color: var(--font-color);
    cursor: pointer;
    height: 100%;
    flex: 0 1 auto;
}

button:hover {
    box-shadow: 0vmin 0.5vmin 0.5vmin hsl(0, 0%, 65%);
    transform: translateY(-0.2vmin);
}

button:active {
    transform: translateY(0.3vmin);
    background-color: hsl(0, 0%, 100%);
    box-shadow: none;
}

#help {
    width: 30%;
}

#newCard {
    width: 70%;
}

/*
-------------------------------------------------------------------
Overlay
-------------------------------------------------------------------
*/

#helpOverlay {
    font-family: "Raleway", sans-serif;
    font-size: 1.2rem;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 94vw;
    max-width: 800px;
    height: 70vh;
    border-radius: var(--corner-radius);
    box-shadow: 0vmin 0.5vmin 1vmin var(--box-shaow-color);
    background-color: var(--bg-overlay);
    justify-content: center;
    padding: 1rem;
    z-index: 10;
    overflow-y: scroll;
    line-height: 1.3;
}

#helpOverlay ul,
#helpOverlay ol {
    margin: 0.5rem 0 0 1rem;
    padding-left: 0;
}

#helpOverlay li {
    margin: 0.35rem 0;
}

/*
-------------------------------------------------------------------
MEDIA QUERIES
-------------------------------------------------------------------
*/

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: hsl(0, 0%, 20%);
        --font-color: hsl(0, 0%, 90%);
        --bg-overlay: hsl(0, 0%, 30%);
        --box-shaow-color: hsl(0, 0%, 10%);
    }

    main ol li:nth-of-type(1) {
        background-color: var(--color-1);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(1)::before {
        background-color: var(--color-1);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(2) {
        background-color: var(--color-2);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(2)::before {
        background-color: var(--color-2);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(3) {
        background-color: var(--color-3);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(3)::before {
        background-color: var(--color-3);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(4) {
        background-color: var(--color-4);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(4)::before {
        background-color: var(--color-4);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(5) {
        background-color: var(--color-5);
        border-color: var(--font-color);
    }

    main ol li:nth-of-type(5)::before {
        background-color: var(--color-5);
        border-color: var(--font-color);
    }

    button {
        border: 3px solid white;
        background-color: hsl(0, 0%, 40%);
        color: var(--font-color);
    }

    button:hover {
        box-shadow: 0vmin 0.5vmin 0.5vmin hsl(0, 0%, 0%);
    }

    button:active {
        background-color: hsl(0, 0%, 40%);
        box-shadow: none;
    }
}