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

* {
    margin: 0;
}

html {
    -moz-text-size-adjust: none;
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
    tab-size: 4;
    font-size: 1.2em;
}

body {
    margin: 0;
}

:root {
    color-scheme: light dark;
    --color-black: black;
    --color-white: white;
    --color-fg: light-dark(var(--color-black), var(--color-white));
    --color-bg: light-dark(var(--color-white), var(--color-black));
    --color-accent: light-dark(
	color-mix(in hsl, rebeccapurple, black 10%),
	color-mix(in hsl, rebeccapurple, white 30%)
    );
    --color-red: #CC0000;
    --color-border: light-dark(#d0d0d0, #555555);
    --color-bg-box: light-dark(#f6f6f6, #101010);
    --font-family-serif-cn: "Noto Serif SC", serif;
    --font-family-serif: "Alegreya Variable", "Noto Serif SC", serif;
    --font-family-sans: "Cabin Variable", "Noto Sans SC", system-ui, --apple-system, sans-serif;
    --font-family-mono: "Ubuntu Sans Mono Variable", monospace;

    --sidebar-width: 15rem;
    --border-dashed: dashed 0.1rem var(--color-border);
    @media (prefers-contrast: less) {
	--_color-black: hsl(0, 0%, 10%);
	--_color-white: hsl(0, 0%, 85%);
    }
}

.font-cn {
    font-family: "Noto Serif SC", serif;
}

body {
    font-family: var(--font-family-serif);
    text-spacing-trim: trim-start;
    width: clamp(10rem, 90%, 55rem);
    margin-inline: auto;
    color: var(--color-fg);
    background-color: var(--color-bg);

    counter-reset: sidenote;
}

main {
    container-type: inline-size;
    container-name: wide;
    max-width: 32rem;
    line-height: 1.4;
    padding-block-end: 8rem;
}

@container wide (16rem <= inline-size) {
    article:lang(zh-CN), section:lang(zh-CN) {
        text-align: justify;
    }
}

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

h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
    text-wrap: balance;
    text-align: left;
    font-weight: 500;
    line-height: 1;
}

h1 {
    margin-block-start: 3.0rem;
    margin-block-end: 1.3rem;
    font-size: 2.6rem;
}

h2 {
    margin-block-start: 2.1rem;
    margin-block-end: 1.2rem;
    font-size: 2.0rem;
}

h3 {
    margin-block-start: 1.4rem;
    margin-block-end: 1.2rem;
    font-size: 1.3rem;
}

p {
    overflow-wrap: break-word;
    line-height: 1.4;
    margin-block-end: 0.8rem;
}

p:has(+ :is(ul, ol)) {
    margin-block-end: 0.2rem;
}

ul, ol {
    padding-inline-start: 1rem;
    margin-block-end: 0.8rem;
}

li {
    ul, ol {
        margin-block-end: 0;
    }
}

pre,
code {
    font-family: var(--font-family-mono);
    font-weight: 450;
    background-color: var(--color-bg-box);
    font-size: 0.75rem;
}

pre {
    margin-block-end: 0.5rem;
    padding: 0.5rem;
    overflow-inline: scroll;
}

header {
    margin-block-start: 1rem;
    margin-block-end: 2rem;
}

footer {
    font-size: 0.875rem;
    text-align: center;
}

blockquote {
    margin-block-end: 0.8rem;
    padding: 0 1rem;
    border-inline-start: solid 0.1rem var(--color-border);
}

:where(p, ul, ol, pre, blockquote):last-child {
    margin-block-end: 0;
}

.note, aside {
    font-family: var(--font-family-sans);
    font-size: 0.75em;
    font-weight: 300;

    padding-block: 0.1rem;

    border-block: solid 0.1rem #dee9ed;
}

.note {
    float: inline-start;
    clear: inline-start;
    width: 100%;
}

aside {
    margin-block-end: 0.8rem;
}

span.sidenote-indicator {
    font-variant-position: super;
    color: var(--color-red);
    font-family: var(--font-family-serif);
}

span.side.note .sidenote-indicator {
    font-variant-position: normal;
    margin-inline-end: 0.3rem;
}

@media (width >= 72rem) {
    .note {
        float: inline-end;
        clear: inline-end;
        width: var(--sidebar-width);
        margin-inline-end: calc(-1 * var(--sidebar-width) - 2rem);
        margin-block-start: 0;
        margin-block-end: 0.8rem;
    }

    h1, h2, h3, h4, h5, h6 {
        margin-inline-end: -17rem;
    }
}

article.tweet {
    + article.tweet {
        border-top: 0;
    }

    border: var(--border-dashed);

    time {
        font-size: 0.75em;
        font-family: var(--font-family-mono);
        margin-inline-end: 0.4rem;
    }
    padding: 0.4rem 0.5rem 0.4rem 0.6rem;
}