/* ── Variables ─────────────────────────────────────────────── */
:root {
    --base-hue: 215;
    --brand-color: hsl(var(--base-hue), 65%, 40%);
    --action-color: hsl(var(--base-hue), 75%, 30%);
    --highlight-color: hsl(25, 65%, 30%);

    --text-color: hsl(30, 5%, 15%);
    --text-secondary: hsl(30, 3%, 38%);
    --muted-color: hsl(30, 3%, 45%);
    --border-color: hsl(30, 5%, 85%);

    --tip-hue: 145;
    --tip-bg-color: hsl(var(--tip-hue), 30%, 95%);
    --tip-border-color: hsl(var(--tip-hue), 40%, 40%);
    --tip-text-color: hsl(var(--tip-hue), 40%, 28%);

    --info-hue: 200;
    --info-bg-color: hsl(var(--info-hue), 35%, 95%);
    --info-border-color: hsl(var(--info-hue), 55%, 40%);
    --info-text-color: hsl(var(--info-hue), 55%, 30%);

    --cuisine-hue: 45;
    --cuisine-color: hsl(var(--cuisine-hue), 80%, 38%);
    --category-hue: 0;
    --category-color: hsl(var(--category-hue), 0%, 45%);
    --diet-hue: 130;
    --diet-color: hsl(var(--diet-hue), 45%, 30%);
}

/* ── Base ──────────────────────────────────────────────────── */
body {
    font-family: "Source Serif 4", "Iowan Old Style", Charter, Georgia, serif;
    color: var(--text-color);
}

@font-face {
    font-family: "BerkeleyMono";
    src: url("../fonts/BerkeleyMono-Regular.woff2"),
         url("../fonts/BerkeleyMono-Regular.woff");
    font-weight: bold;
    font-style: italic, oblique;
}
@font-face {
    font-family: "BerkeleyMono";
    src: url("../fonts/BerkeleyMono-Italic.woff2"),
         url("../fonts/BerkeleyMono-Italic.woff");
    font-style: italic, oblique;
}
@font-face {
    font-family: "BerkeleyMono";
    src: url("../fonts/BerkeleyMono-Bold.woff2"),
         url("../fonts/BerkeleyMono-Bold.woff");
    font-weight: bold;
}
@font-face {
    font-family: "BerkeleyMono";
    src: url("../fonts/BerkeleyMono-Regular.woff2"),
         url("../fonts/BerkeleyMono-Regular.woff");
}

.container {
    max-width: 700px;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

strong {
    font-weight: 700;
}

/* ── Links ─────────────────────────────────────────────────── */
a {
    color: var(--brand-color);
    text-decoration: underline;
}

h1 a, h2 a, h3 a, h4 a, h5 a, h6 a {
    text-decoration: none;
}

a:hover {
    color: var(--action-color);
    text-decoration: underline;
}

/* ── Navigation ────────────────────────────────────────────── */
#nav-border {
    border-bottom: none;
}

#nav {
    padding: 0.5rem 0;
    gap: 1.25rem;
    flex-wrap: nowrap;
}

#nav a {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--muted-color);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1;
    padding: 0.15rem 0;
    transition: color 0.15s ease;
}

#nav a:hover {
    color: var(--action-color);
}

#nav a:visited,
#nav a.active {
    color: var(--muted-color);
}

/* ── Typography ────────────────────────────────────────────── */
#main {
    font-weight: 400;
    font-size: 1.1rem;
    margin-top: 1.5rem;
    margin-bottom: 2rem;
}

#main p {
    line-height: 1.75;
}

#main :is(h1, h2, h3, h4, h5, h6) {
    font-family: "Rubik", sans-serif;
    font-weight: 600;
    padding-bottom: 0.75rem;
    padding-top: 1.3rem;
}

#main > h1:first-child,
#main > header > h1:first-child {
    padding-top: 0.5rem;
}

#main h2 {
    font-size: 1.9rem;
}

header h1 {
    padding-bottom: 0.25rem;
    margin-bottom: 0;
}

/* Heading anchor links */
h1, h2, h3, h4, h5, h6 {
    display: flex;
    flex-wrap: nowrap;
    align-items: baseline;
}

.heading-anchor {
    opacity: 0;
    margin-left: 0.5rem;
    font-size: 0.8em;
    font-weight: 400;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
}

h1:hover .heading-anchor,
h2:hover .heading-anchor,
h3:hover .heading-anchor,
h4:hover .heading-anchor,
h5:hover .heading-anchor,
h6:hover .heading-anchor {
    opacity: 1;
}

/* ── Homepage intro ────────────────────────────────────────── */
.home-intro {
    margin-bottom: 1.5rem;
}

.home-intro h1 {
    font-family: "Rubik", sans-serif;
    font-weight: 600;
    font-size: 2rem;
    margin-bottom: 0.25rem;
    padding: 0;
}

.home-intro p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.home-intro a {
    color: var(--brand-color);
}

/* ── Section labels (shared) ──────────────────────────────── */
.section-label,
.featured-section h2,
.recent-section h2 {
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted-color);
    margin-bottom: 0.75rem;
    padding-top: 0;
    padding-bottom: 0;
}

/* ── Featured writing ──────────────────────────────────────── */
.featured-section {
    margin-bottom: 3rem;
}

.featured-grid {
    display: grid;
    gap: 1rem;
}

.featured-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.featured-item:hover {
    text-decoration: none;
    color: inherit;
}

.featured-item:hover .featured-title {
    color: var(--brand-color);
}

.featured-thumb {
    width: 72px;
    height: 48px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.featured-text {
    min-width: 0;
    padding-top: 0.1rem;
}

.featured-title {
    display: block;
    font-family: "Rubik", sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
    transition: color 0.15s ease;
    line-height: 1.3;
}

.featured-date {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 0.75rem;
    color: var(--muted-color);
}

.featured-summary {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

/* ── Article listings ──────────────────────────────────────── */
.article-listing {
    margin-bottom: 1.5rem;
}

.article-listing-title {
    font-size: 1.05rem;
    font-weight: 600;
}

.article-listing-section {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted-color);
    margin-left: 0.5rem;
    text-decoration: none;
}

.article-listing-section:hover {
    color: var(--action-color);
    text-decoration: none;
}

.article-listing-date {
    color: var(--muted-color);
    font-size: 0.85rem;
}

.article-listing-summary {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

/* Recent section on homepage */
.recent-section {
    margin-top: 0;
}

.all-writing-link {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--muted-color);
    text-decoration: none;
}

.all-writing-link:hover {
    color: var(--action-color);
}

/* ── Article meta on single pages ──────────────────────────── */
.article-meta {
    margin-bottom: 1.5rem;
}

.article-meta time {
    display: inline;
    color: var(--muted-color);
    font-size: 0.9rem;
}

.article-meta .tag-list {
    margin-top: 0.5rem;
}

.article-meta .tag-list a {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 0.8rem;
    color: var(--muted-color);
    text-decoration: none;
    margin-right: 0.5rem;
}

.article-meta .tag-list a:hover {
    color: var(--action-color);
    text-decoration: underline;
}

/* Content type badge on single pages */
.content-type-badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Section badge in related posts */
.badge.badge-secondary {
    background-color: transparent;
    color: var(--muted-color);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 400;
    vertical-align: baseline;
    padding: 0;
}

/* ── Abstract/summary box ──────────────────────────────────── */
#abstract {
    border-radius: 3px;
    background-color: hsl(30, 10%, 97%);
    border-left: 3px solid var(--border-color);
    padding: 1rem 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

/* ── Blockquotes ───────────────────────────────────────────── */
#main blockquote {
    font-weight: 300;
    font-style: italic;
    padding-left: 1rem;
    margin-left: 1rem;
    border-left: 3px solid var(--border-color);
}

#main blockquote.tip,
#main blockquote.info {
    font-style: normal;
    font-weight: 400;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 3px;
    position: relative;
}

#main blockquote.tip {
    background-color: var(--tip-bg-color);
    border-left: 3px solid var(--tip-border-color);
}

#main blockquote.info {
    background-color: var(--info-bg-color);
    border-left: 3px solid var(--info-border-color);
}

#main blockquote.tip::before,
#main blockquote.info::before {
    content: "";
    font-weight: 700;
    font-style: normal;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

#main blockquote.tip::before {
    content: "TIP";
    color: var(--tip-text-color);
}

#main blockquote.info::before {
    content: "INFO";
    color: var(--info-text-color);
}

#main blockquote.tip p,
#main blockquote.info p {
    margin: 0;
}

/* ── Code ──────────────────────────────────────────────────── */
code, pre {
    font-family: "BerkeleyMono", monospace;
}

pre {
    overflow-x: scroll;
    max-width: 100%;
    font-size: 0.85em;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
    white-space: pre;
}

pre::-webkit-scrollbar {
    height: 12px;
    -webkit-appearance: none;
}

pre::-webkit-scrollbar-track {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

pre::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
}

pre::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.5);
}

code {
    color: var(--highlight-color);
}

.highlight {
    overflow: hidden;
    max-width: 100%;
    margin-bottom: 1.5rem;
}

.highlight::-webkit-scrollbar {
    height: 12px;
    -webkit-appearance: none;
}

.highlight::-webkit-scrollbar-track {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

.highlight::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
}

.highlight::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.5);
}

.highlight code {
    font-size: 1em;
}

p code,
li code {
    font-size: 0.85em;
}

code.has-jax {
    -webkit-font-smoothing: antialiased;
    background: inherit !important;
    border: none !important;
    font-size: 100%;
}

/* ── Lists ─────────────────────────────────────────────────── */
article ol,
article ul {
    margin-left: 0.5rem;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-left: 1.6rem;
}

article ol li,
article ul li {
    padding-top: 0.6rem;
    margin-left: 0;
    padding-left: 0;
}

article > dl > dd {
    padding-left: 2rem;
}

/* ── Tables ────────────────────────────────────────────────── */
article table {
    margin: 2rem 0;
    border: 1px solid var(--border-color);
    border-collapse: collapse;
}

article table td,
article table th {
    padding: 0.4rem 1rem;
    border: 1px solid var(--border-color);
}

article table th {
    text-align: center;
}

/* ── Images & figures ──────────────────────────────────────── */
figure img {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

figcaption h4 {
    font-family: inherit;
    font-weight: 400;
    font-size: 0.9rem;
    text-align: center;
    font-style: italic;
    padding-top: 0.75rem;
    padding-bottom: 1rem;
    color: var(--muted-color);
}

.figures-side-by-side {
    display: flex;
    gap: 2rem;
    margin: 0 0 2rem 0;
    align-items: flex-start;
}

.figures-side-by-side figure {
    flex: 0 1 auto;
    margin: 0;
    display: flex;
    flex-direction: column;
    position: relative;
}

.figures-side-by-side figure img {
    width: auto;
    max-height: 400px;
    object-fit: contain;
}

.figures-side-by-side figure::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    pointer-events: none;
}

.figures-side-by-side figcaption {
    margin-top: 0.5rem;
}

.figures-side-by-side figcaption h4 {
    padding-top: 0.5rem;
    padding-bottom: 0;
}

/* ── D2 diagrams ───────────────────────────────────────────── */
figure.d2-diagram {
    margin: 2rem 0;
}

figure.d2-diagram img {
    max-width: 100%;
    height: auto;
    width: 90%;
}

figure.d2-diagram figcaption {
    font-size: 0.9rem;
    text-align: center;
    font-style: italic;
    padding-top: 0.5rem;
}

/* ── TOC ───────────────────────────────────────────────────── */
aside.toc ul > li {
    list-style-type: none;
    padding-left: 1.5rem;
}

aside.toc ul {
    padding-left: 0;
}

/* ── Search ────────────────────────────────────────────────── */
.search-inline {
    margin-top: 1rem;
}

.form-inline #search-query {
    margin-right: 0.5rem;
    border: 1px solid var(--border-color);
}

.search-button {
    background-color: var(--brand-color);
    color: white;
    border: 1px solid var(--brand-color);
    padding: 0.375rem 1rem;
}

.search-button:hover {
    background-color: var(--action-color);
    border-color: var(--action-color);
    color: white;
}

mark {
    background-color: var(--tip-bg-color);
    color: var(--tip-text-color);
    font-weight: 600;
    padding: 0.1em 0.2em;
    border-radius: 2px;
}

/* ── Home page hr ──────────────────────────────────────────── */
#main hr {
    margin-top: 2rem;
    margin-bottom: 2rem;
    border-color: var(--border-color);
}

/* ── View source link ──────────────────────────────────────── */
.view-source {
    margin-top: 2rem;
    font-size: 0.9rem;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
    margin-top: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-links nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--muted-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--action-color);
}

.footer-links .icon {
    width: 16px;
    height: 16px;
    margin-right: 0.4rem;
}

.icon {
    width: 24px;
    height: 24px;
    margin-right: 5px;
}

/* ── Resume ────────────────────────────────────────────────── */
article.section-resume h3 {
    position: relative;
}

article.section-resume h3::before {
    content: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="hsl(215, 65%25, 40%25)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M3 21h18"/%3E%3Cpath d="M5 21V7l8-4v18"/%3E%3Cpath d="M19 21V10l-6-3"/%3E%3Cpath d="M9 9v.01"/%3E%3Cpath d="M9 12v.01"/%3E%3Cpath d="M9 15v.01"/%3E%3C/svg%3E');
    position: absolute;
    left: -28px;
    top: 1.35rem;
    display: block;
}

article.section-resume h4 {
    position: relative;
}

article.section-resume h4::before {
    content: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="hsl(215, 65%25, 40%25)" stroke-width="2"%3E%3Crect x="5" y="2" width="14" height="20" rx="2"/%3E%3Ccircle cx="12" cy="8" r="3"/%3E%3Cpath d="M8 15h8"/%3E%3Cpath d="M8 18h8"/%3E%3C/svg%3E');
    position: absolute;
    left: -25px;
    top: 1.4rem;
    display: block;
}

/* ── List page content separator ───────────────────────────── */
.list-intro {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* ── Accessibility ─────────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--brand-color);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
}

.skip-to-main:focus {
    top: 0;
    color: white;
    outline: 3px solid var(--action-color);
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--action-color);
    outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
input:focus:not(:focus-visible) {
    outline: none;
}

nav a:focus-visible {
    outline: 3px solid var(--action-color);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ── Print ─────────────────────────────────────────────────── */
.print-only {
    display: none;
}

@media print {
    .no-print, nav, footer, .content-type-badge, .skip-to-main {
        display: none !important;
    }

    .print-only {
        display: block !important;
    }

    body {
        font-size: 11pt;
    }

    h1 { font-size: 20pt; }
    h2, h3 { font-size: 16pt; }

    figure {
        display: none;
    }
}

/* ── Mobile ────────────────────────────────────────────────── */
@media (max-width: 576px) {
    article.section-resume h3::before,
    article.section-resume h4::before {
        display: none;
    }

    .form-inline {
        flex-wrap: nowrap !important;
        gap: 0.25rem;
    }

    .form-inline #search-query {
        margin-right: 0.25rem;
        flex: 1 1 auto;
        min-width: 0;
        font-size: 0.9rem;
    }

    .search-button {
        flex: 0 0 auto;
        padding: 0.375rem 0.75rem;
        font-size: 0.9rem;
        white-space: nowrap;
    }

    #nav {
        gap: 0.75rem;
        padding: 0.4rem 0;
    }

    #nav a {
        font-size: 0.85rem;
        white-space: nowrap;
    }

    .home-intro h1 {
        font-size: 1.6rem;
    }

    .home-intro p {
        font-size: 1rem;
    }

    .figures-side-by-side {
        flex-direction: column;
        gap: 1rem;
    }

    .figures-side-by-side figure img {
        max-height: 250px;
        width: 100%;
    }

    .footer-links nav {
        gap: 1rem;
    }
}