:root {
    --bg: #fff;
    --fg: #1a1a1a;
    --muted: #6b6b6b;
    --link: #1a1a1a;
    --rule: #e5e5e5;
    --border: #c4c4c4;
    --code-bg: #f5f5f5;
    --accent: #c4262e;

    --measure: 42rem;
    --font: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
    --font-mono: "Source Code Pro", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;

    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111;
        --fg: #e6e6e6;
        --muted: #8f8f8f;
        --link: #e6e6e6;
        --rule: #2a2a2a;
        --border: #3d3d3d;
        --code-bg: #1b1b1b;
        --accent: #ff6b6b;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 4rem 1.25rem;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    overflow-wrap: break-word;
}

.page {
    max-width: var(--measure);
    margin-inline: auto;
}

a {
    color: var(--link);
    text-decoration: underline;
    text-decoration-color: var(--muted);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
}

a:hover {
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--fg);
    font-weight: 600;
    line-height: 1.3;
    margin: 2em 0 0.4em;
    scroll-margin-top: 1.5rem;
}

h1 {
    font-family: var(--font-display);
    font-size: 2.1em;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin-top: 0;
}

h2 { font-size: 1.15em; }
h3,
h4,
h5,
h6 { font-size: 1em; }

p,
ul,
ol,
pre,
blockquote,
table {
    margin: 0 0 0.75em;
}

.muted,
time {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

hr {
    border: none;
    border-top: 1px solid var(--rule);
    margin: 2.5em 0;
}

/* header */

.masthead {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    column-gap: 1rem;
    row-gap: 0.1rem;
}

.masthead h1 {
    margin: 0;
}

.roles {
    margin: 0;
    font-size: 0.95em;
    font-weight: 600;
    color: var(--fg);
}

.roles .sep {
    margin: 0 0.3em;
    font-weight: 400;
    color: var(--border);
}

.tagline {
    margin: 0.3em 0 0;
    font-family: var(--font-mono);
    font-size: 0.8em;
    color: var(--muted);
}

/* post lists */

.list {
    list-style: none;
    padding: 0;
}

.list li {
    display: grid;
    grid-template-columns: 6.5em minmax(0, 1fr);
    column-gap: 1em;
    margin-bottom: 0.15em;
}

.list--detailed li {
    margin-bottom: 0.8em;
}

.list--detailed li:last-child {
    margin-bottom: 0;
}

.entry {
    min-width: 0;
}

.entry > a {
    font-weight: 600;
}

.entry-desc {
    margin: 0.1em 0 0;
    font-size: 0.9em;
    color: var(--muted);
}

.entry-meta {
    margin: 0.1em 0 0;
    font-size: 0.8em;
    color: var(--muted);
    opacity: 0.8;
}

.entry-meta .tag {
    white-space: nowrap;
}

.list-group {
    margin: 1.25em 0 0.2em;
    font-family: var(--font-mono);
    font-size: 0.75em;
    font-weight: 400;
    color: var(--muted);
    text-transform: lowercase;
}

.list .is-current .entry > a,
.list .is-current > a {
    font-weight: 600;
    text-decoration: none;
}

.list .is-current .entry > a::after,
.list .is-current > a::after {
    content: "  \2190  you are here";
    font-weight: 400;
    color: var(--accent);
}

.more {
    margin-top: 1rem;
}

/* boxes */

.box {
    position: relative;
    margin: 2.25rem 0 0;
    padding: 1.4rem 1.25rem 1rem;
    border: 1px solid var(--border);
}

.box > .box-title {
    position: absolute;
    top: 0;
    left: 1rem;
    transform: translateY(-50%);
    margin: 0;
    padding: 0 0.5rem;
    background: var(--bg);
    font-family: var(--font-mono);
    font-size: 0.72em;
    font-weight: 600;
    letter-spacing: 0.12em;
    line-height: 1.4;
    text-transform: uppercase;
    color: var(--fg);
}

.box > .box-title + .list-group {
    margin-top: 0;
}

.box > :last-child,
.box .list:last-child {
    margin-bottom: 0;
}

/* on phones just a line on top */
@media (max-width: 40rem) {
    .box {
        padding: 1.5rem 0 0;
        border-left: none;
        border-right: none;
        border-bottom: none;
    }

    .box > .box-title {
        left: 0;
        padding-left: 0;
    }
}

/* contact */

.contact {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    column-gap: 1.5em;
    row-gap: 0.35em;
    margin: 0;
}

.contact dt {
    font-weight: 600;
}

.contact dt .muted {
    font-weight: 400;
    font-size: 0.9em;
}

.contact dd {
    margin: 0;
}

@media (max-width: 40rem) {
    .contact {
        grid-template-columns: minmax(0, 1fr);
        row-gap: 0;
    }

    .contact dd + dt {
        margin-top: 0.6em;
    }
}

.site-footer {
    margin-top: 4rem;
    font-size: 0.85em;
    color: var(--muted);
}

.site-footer a {
    color: var(--muted);
}

.site-footer p {
    margin: 0 0 0.4em;
}

.site-footer .tagline {
    margin-top: 0.8em;
}

/* articles table */

.table-wrap {
    overflow-x: auto;
    margin: -0.25rem -0.25rem 0;
    padding: 0 0.25rem;
}

.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95em;
}

.data th,
.data td {
    padding: 0.45em 0.75em 0.45em 0;
    border-bottom: 1px solid var(--rule);
    text-align: left;
    vertical-align: top;
}

.data th:last-child,
.data td:last-child {
    padding-right: 0;
}

.data thead th {
    border-bottom-color: var(--border);
    font-family: var(--font-mono);
    font-size: 0.72em;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: lowercase;
    white-space: nowrap;
    color: var(--muted);
}

.data .num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data .col-date,
.data .col-cat {
    white-space: nowrap;
}

.data td.col-cat {
    font-family: var(--font-mono);
    font-size: 0.8em;
    color: var(--muted);
    padding-top: 0.65em;
}

.data .col-date,
.data .num {
    color: var(--muted);
}

.row-title {
    font-weight: 600;
}

.row-desc {
    margin-top: 0.1em;
    font-size: 0.88em;
    line-height: 1.45;
    color: var(--muted);
}

.row-tags {
    font-size: 0.8em;
    color: var(--muted);
    opacity: 0.8;
}

.data tfoot td {
    border-bottom: none;
    padding-top: 0.75em;
    font-family: var(--font-mono);
    font-size: 0.75em;
    color: var(--muted);
}

@media (max-width: 40rem) {
    .data .col-cat,
    .data .col-pages {
        display: none;
    }
}

/* article page */

.progress {
    position: fixed;
    inset: 0 0 auto 0;
    height: 3px;
    z-index: 10;
    pointer-events: none;
}

.progress span {
    display: block;
    height: 100%;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: 0 50%;
}

.back {
    display: inline-block;
    margin-bottom: 3rem;
    font-size: 0.9em;
    color: var(--muted);
    text-decoration: none;
}

.back:hover {
    color: var(--fg);
}

.meta {
    margin-bottom: 0;
    font-size: 0.9em;
    color: var(--muted);
}

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

.prose ul,
.prose ol {
    padding-left: 1.25em;
}

.prose blockquote {
    margin-left: 0;
    padding-left: 1em;
    border-left: 2px solid var(--rule);
    color: var(--muted);
}

.prose code {
    font-family: var(--font-mono);
    font-size: 0.88em;
}

.prose :not(pre) > code {
    padding: 0.1em 0.3em;
    background: var(--code-bg);
    border-radius: 3px;
}

.prose pre {
    padding: 1em;
    overflow-x: auto;
    background: var(--code-bg);
    border-radius: 4px;
    line-height: 1.35;
}

.prose table {
    display: block;
    overflow-x: auto;
    border-collapse: collapse;
    font-size: 0.92em;
}

.prose th,
.prose td {
    padding: 0.35em 0.9em 0.35em 0;
    border-bottom: 1px solid var(--rule);
    text-align: left;
    vertical-align: top;
}

.prose .footnotes {
    font-size: 0.9em;
    color: var(--muted);
}

/* obsidian callouts */

.prose blockquote.callout {
    padding: 0.7em 1em 0.2em;
    border-left: 3px solid var(--fg);
    background: var(--code-bg);
    color: var(--fg);
}

.callout-title {
    margin: 0 0 0.35em;
    font-weight: 600;
}

.callout-kind {
    margin-right: 0.6em;
    font-family: var(--font-mono);
    font-size: 0.75em;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.callout--warning,
.callout--caution,
.callout--danger,
.callout--important {
    --callout: var(--accent);
}

.prose blockquote.callout--warning,
.prose blockquote.callout--caution,
.prose blockquote.callout--danger,
.prose blockquote.callout--important {
    border-left-color: var(--callout);
}

.callout--warning .callout-kind,
.callout--caution .callout-kind,
.callout--danger .callout-kind,
.callout--important .callout-kind {
    color: var(--callout);
}

/* colophon */

.colophon {
    margin-top: 2.5em;
    padding-top: 0.9em;
    border-top: 1px dashed var(--border);
    font-family: var(--font-mono);
    font-size: 0.75em;
    line-height: 1.6;
    color: var(--muted);
}

.colophon-title {
    display: block;
    margin-bottom: 0.2em;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg);
}

/* headings + numbering */

.prose {
    counter-reset: h1;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
    position: relative;
    color: var(--fg);
}

.prose h1,
.prose h2,
.prose h3 {
    font-family: var(--font-display);
    letter-spacing: -0.01em;
}

.prose h1 {
    font-size: 1.55em;
    font-weight: 700;
    margin: 2.5em 0 0.5em;
    padding-top: 1em;
    border-top: 1px solid var(--rule);
}

.prose > h1:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.prose h2 {
    font-size: 1.25em;
    font-weight: 700;
    margin: 1.75em 0 0.4em;
}

.prose h3 {
    font-size: 1.08em;
    font-weight: 600;
    margin: 1.5em 0 0.3em;
}

.prose h4,
.prose h5,
.prose h6 {
    font-size: 1em;
    font-weight: 600;
    margin: 1.25em 0 0.25em;
}

.prose h1 { counter-increment: h1; counter-reset: h2; }
.prose h2 { counter-increment: h2; counter-reset: h3; }
.prose h3 { counter-increment: h3; counter-reset: h4; }
.prose h4 { counter-increment: h4; counter-reset: h5; }
.prose h5 { counter-increment: h5; counter-reset: h6; }
.prose h6 { counter-increment: h6; }

.prose h1::before { content: counter(h1) "."; }
.prose h2::before { content: counter(h1) "." counter(h2) "."; }
.prose h3::before { content: counter(h1) "." counter(h2) "." counter(h3) "."; }
.prose h4::before { content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) "."; }
.prose h5::before { content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "."; }
.prose h6::before { content: counter(h1) "." counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "." counter(h6) "."; }

.prose h1::before,
.prose h2::before,
.prose h3::before,
.prose h4::before,
.prose h5::before,
.prose h6::before {
    margin-right: 0.45em;
    font-family: var(--font);
    font-size: 0.72em;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

/* toc */

.toc {
    font-size: 0.85em;
    line-height: 1.35;
}

.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc;
}

.toc ul ul {
    padding-left: 1em;
}

.toc li {
    margin: 0.15em 0;
    counter-increment: toc;
}

.toc a {
    color: var(--muted);
    text-decoration: none;
}

.toc a::before {
    content: counters(toc, ".") ".";
    margin-right: 0.5em;
    font-variant-numeric: tabular-nums;
}

.toc code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.toc-scroll > ul > li > a {
    color: var(--fg);
    font-weight: 600;
}

.toc-scroll > ul > li + li {
    margin-top: 0.5em;
}

.toc a:hover {
    color: var(--fg);
}

.toc a.highlight {
    color: var(--accent);
}

@media (min-width: 76rem) {
    /* desktop: toc on the left */
    .article-layout {
        display: grid;
        grid-template-columns: minmax(18rem, 24rem) var(--measure) minmax(0, 16rem);
        grid-template-rows: repeat(5, auto);
        justify-content: center;
        column-gap: 3rem;
        max-width: none;
    }

    .article-layout > * {
        grid-column: 2;
    }

    .article-layout > .toc {
        grid-column: 1;
        grid-row: 1 / -1;
        position: sticky;
        top: 1.5rem;
        align-self: start;
        max-height: calc(100vh - 3rem);
        margin: 0;
        padding: 1.5rem 1rem 1rem;
        display: flex;
        flex-direction: column;
    }

    .toc-scroll {
        min-height: 0;
        overflow-y: auto;
        overscroll-behavior: contain;
        scrollbar-width: thin;
        scrollbar-color: var(--rule) transparent;
    }

    /* hang the numbers in the left margin */
    .article-layout > .prose {
        padding-left: 4.25rem;
    }

    .prose h1::before,
    .prose h2::before,
    .prose h3::before,
    .prose h4::before {
        position: absolute;
        right: 100%;
        margin-right: 0.9rem;
        white-space: nowrap;
        line-height: 1.806; /* 1.3 / 0.72, keeps numbers level with the heading */
    }
}