*,
::after,
::before {
    box-sizing: border-box;
    margin: 0;
}

:root {
    color-scheme: light dark;
    overflow-y: scroll;
    --bold: 600;
    --focus: orange;
    --btn-blue: rgb(64, 92, 245);

    --bg: black;
    --fg: white;
    --bg-main: rgb(0, 100, 0);
    --ui-bg: var(--bg);
    background-color: var(--bg);
    color: var(--fg);
    --shadow: 0.1875rem 0.1875rem 0.3125rem 0rem rgba(0, 0, 0, 1);
    --opacity-disabled: 0.75;
}

.lightmode {
    --bg: white;
    --fg: black;
    --ui-bg: var(--bg);
    --shadow: 0.1875rem 0.1875rem 0.3125rem 0rem rgba(0, 0, 0, 0.33);
    background-color: var(--bg);
    color: var(--fg);
    --opacity-disabled: 0.5;
}

body {
    line-height: 1.5;
    font-family: system-ui, sans-serif;
    font-size: clamp(1rem, 0.8995rem + 0.4673vw, 1.25rem);
    position: relative;
}

:focus-visible {
    outline: 0.125rem solid var(--focus);
    outline-offset: 0.125rem;
}
abbr[title] {
    text-decoration: none;
    border-bottom: 0.0625rem dotted var(--fg);
}

input {
    font-family: inherit;
    font-size: inherit;
}

h1,
h2,
h3 {
    font-weight: normal;
}

h1,
.h1 {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    line-height: 1;
    align-items: center;
    justify-content: center;
    font-size: clamp(1.25rem, 0.9486rem + 1.4019vw, 2rem);

    & img {
        max-width: 4.6875rem;
        height: auto;
    }
}

h2 {
    line-height: normal;
}

button {
    all: unset;
    cursor: pointer;
    padding: 0.3125rem 0.9375rem;
    box-shadow: var(--shadow);
    border-radius: 0.3125rem;
    background-color: goldenrod;
    color: black;
    font-weight: 600;

    @media (hover: hover) {
        &:hover {
            opacity: 0.8;
        }
    }

    &[disabled] {
        cursor: not-allowed;
        opacity: var(--opacity-disabled);
    }
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

details {
    padding: 0.625rem 1.25rem;
    background-color: var(--bg);
}

details summary {
    cursor: pointer;
    transition: margin 500ms ease-out;
}

details[open] summary {
    margin-block-end: 0.625rem;
}

.bold {
    font-weight: var(--bold);
}

.link-external {
    color: var(--fg);
    text-decoration: none;
    white-space: nowrap;

    &:hover {
        text-decoration: underline;
    }

    &::after {
        content: " \27F6";
    }
}

.theme-toggler {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.3125rem 0.625rem;

    & button {
        font-size: clamp(0.875rem, 0.8248rem + 0.2336vw, 1rem);
        font-family: inherit;
        background-color: var(--bg-main);
        width: 1.5625rem;
        height: 0.8125rem;
        border-radius: 1.25rem;
        display: flex;
        justify-content: flex-end;
        align-items: center;
        padding: 0.125rem;

        & span {
            height: 0.8125rem;
            width: 0.8125rem;
            background-color: white;
            border-radius: 50%;
        }
    }

    & p {
        font-size: 0.875rem;
        font-weight: var(--bold);
        color: currentColor;

        &.light {
            opacity: 0.75;
        }

        &.dark {
            opacity: 1;
        }
    }
}

.lightmode {
    & .theme-toggler button {
        justify-content: flex-start;
    }

    & p {
        &.light {
            opacity: 1;
        }

        &.dark {
            opacity: 0.5;
        }
    }
}

.page-container {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100dvh;
    height: 100vh;
}

.main-content {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    gap: 1.25rem;
    padding-block: 2.5rem;
    background-color: var(--bg-main);

    /** 
    Hack to make ensure nested grid works correctly.
    For an explanation, see: 
    https://github.com/chrisnajman/code-snippets?tab=readme-ov-file#nested-grid-unusual-behaviour-fixed-by-min-width0
  */
    min-width: 0;
}

.page-header,
.page-footer {
    padding: 2.5rem 1.25rem;
    text-align: center;

    border-style: solid;
    border-color: var(--fg);
}

.page-header {
    display: flex;
    flex-direction: column;
    gap: 0.9375rem;
    border-width: 0 0 0.125rem 0;
}

.page-footer {
    border-width: 0.125rem 0 0 0;
    & a {
        color: var(--fg);
        text-decoration: none;

        &:hover {
            text-decoration: underline;
        }

        &::after {
            content: " \27F6";
        }
    }
}

.rules {
    cursor: pointer;
    width: fit-content;
    margin-inline: auto;
    text-align: center;
    background-color: var(--ui-bg);
    border: 0.125rem solid var(--fg);
    border-radius: 0.625rem;

    & ul {
        text-align: left;
    }

    & li {
        margin-block-end: 0.625rem;
        text-wrap: balance;
    }

    .close-button {
        padding-block: 1.25rem;
    }
}

.game-ui {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: var(--ui-bg);
    border: 0.125rem solid var(--fg);
    border-radius: 0.625rem;
    padding: 2.5rem 1.25rem;
    text-align: center;
    & h2,
    & p {
        font-size: clamp(1.25rem, 0.9988rem + 1.1682vw, 1.875rem);
    }

    & .buttons {
        display: flex;
        flex-direction: column;
        gap: 0.9375rem;

        & button {
            max-width: fit-content;
            margin-inline: auto;
        }
    }
}

.dialog-ace {
    background-color: transparent;
    margin: 0;
    border: 0;
    width: 100%;
    z-index: 100;
    top: 0;
}

.dialog-content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    width: fit-content;
    margin-inline: auto;
    padding: 1.25rem;
    background-color: var(--bg);
    border: 0.125rem solid goldenrod;
    border-radius: 0.625rem;
    box-shadow: var(--shadow);
    color: var(--fg);

    & form {
        display: flex;
        flex-direction: column;
        gap: 0.625rem;
    }
    & img {
        width: clamp(3.75rem, 3.2477rem + 2.3364vw, 5rem);
        width: 3.125rem;
        margin-inline: auto;
    }
    & p {
        font-size: clamp(1rem, 0.8995rem + 0.4673vw, 1.25rem);
        text-wrap: balance;
        max-width: 40ch;
    }
    & button {
        width: fit-content;
        margin-inline: auto;
    }

    .radios {
        display: flex;
        flex-wrap: wrap;
        margin-inline: auto;
        gap: 1.25rem;
        align-items: center;
        justify-content: center;

        & span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
    }
}

.cards-sum {
    opacity: var(--opacity-disabled);
}

.container {
    --_content-max-width: 37.5rem;
    --_content-space-outside: 1.25rem;
    width: min(var(--_content-max-width), 100% - var(--_content-space-outside) * 2);
    margin: 0 auto;
}

/** Text flow */
.flow > * + * {
    margin-block-start: 1em;
    /* em NOT rem & margin-top NOT margin bottom */
}

/** Skip link */
.skip-link {
    color: var(--fg);
    text-decoration: none;
    font-weight: 600;
    padding: 0.3125rem 0.625rem;
    margin-inline-end: 0.625rem;

    &::after {
        content: " \2193";
    }
}
.element-invisible {
    clip: rect(0.0625rem, 0.0625rem, 0.0625rem, 0.0625rem);
    height: 0.0625rem;
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 200;
    &.element-focusable:active,
    &.element-focusable:focus {
        clip: auto;
        height: auto;
        overflow: visible;
    }
}

/* Screenreader only */
.visually-hidden {
    position: absolute;
    width: 0.0625rem;
    height: 0.0625rem;
    padding: 0;
    margin: -0.0625rem;
    overflow: hidden;
    clip-path: inset(0);
    border: 0;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
    html,
    html:focus-within {
        scroll-behavior: auto;
    }
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
        transition-delay: 0ms !important;
    }
}

/* Always comes last **/
.hide {
    display: none;
}