/* ------------------------------------------------------------------
   zuhaitz.dev — strict monochrome
   ink on paper, hairline rules, generous whitespace
   ------------------------------------------------------------------ */

@font-face {
    font-family: 'Fraunces';
    font-style: normal;
    font-weight: 100 900;
    src: url('../fonts/fraunces.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'Fraunces';
    font-style: italic;
    font-weight: 100 900;
    src: url('../fonts/fraunces-italic.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    font-style: normal;
    font-weight: 400;
    src: url('../fonts/plex-mono-400.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    font-style: italic;
    font-weight: 400;
    src: url('../fonts/plex-mono-400i.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    font-style: normal;
    font-weight: 700;
    src: url('../fonts/plex-mono-700.woff2') format('woff2');
    font-display: swap;
}

:root {
    color-scheme: light;

    --paper: #ffffff;
    --paper-soft: #f4f4f2;
    --ink: #121211;
    --ink-2: #3d3d3a;
    --ink-3: #7a7a72;
    --rule: #e4e4df;
    --rule-2: #c3c3bb;

    --serif: 'Fraunces', Georgia, 'Times New Roman', serif;
    --sans: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --measure: 40rem;
    --gap: 1.5rem;

    /* code only: the one place the monochrome rule is relaxed */
    --code-kw: #9c2f5e;
    --code-str: #2f6b47;
    --code-num: #6a4ca8;
    --code-fn: #2a5c86;
    --code-type: #8a5a12;
    --code-var: #2a5c86;
    --code-comment: #8a8a80;
}

:root[data-theme="dark"] {
    color-scheme: dark;

    --paper: #0e0e0d;
    --paper-soft: #191918;
    --ink: #eceae5;
    --ink-2: #b7b7b0;
    --ink-3: #807f78;
    --rule: #262624;
    --rule-2: #3e3e3a;

    --code-kw: #e58aa8;
    --code-str: #86c9a5;
    --code-num: #bda6ea;
    --code-fn: #8cc3e8;
    --code-type: #e0b978;
    --code-var: #8cc3e8;
    --code-comment: #7f7f76;
}

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 1.0625rem;
    line-height: 1.7;
    letter-spacing: -0.005em;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

::selection { background: var(--ink); color: var(--paper); }

a {
    color: inherit;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
    text-decoration-color: var(--rule-2);
    transition: text-decoration-color 120ms ease;
}
a:hover { text-decoration-color: currentColor; }

:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 3px;
    border-radius: 1px;
}

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

hr {
    border: 0;
    border-top: 1px solid var(--rule);
    margin: 2.5rem 0;
}

/* ---------- shell ---------- */

.wrap {
    width: 100%;
    max-width: var(--measure);
    margin-inline: auto;
    padding-inline: var(--gap);
}

.site-main {
    flex: 1 0 auto;
    padding-block: 4rem 5rem;
}

.site-header {
    padding-block: 2rem;
}
.header-inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem 2rem;
    flex-wrap: wrap;
}

.wordmark {
    font-family: var(--serif);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-decoration: none;
}
.wordmark::after {
    content: '.';
    color: var(--ink-3);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem 1.1rem;
}
.nav-link,
.theme-toggle {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    color: var(--ink-3);
    text-decoration: none;
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
}
.nav-link:hover,
.theme-toggle:hover { color: var(--ink); }
.nav-link.is-active {
    color: var(--ink);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.3em;
}

.site-footer {
    padding-block: 1.75rem 3rem;
    border-top: 1px solid var(--rule);
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem 1.5rem;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
    color: var(--ink-3);
}
.footer-links {
    display: flex;
    gap: 1.1rem;
}
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

/* ---------- typography ---------- */

h1, h2, h3, h4 {
    font-family: var(--serif);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    text-wrap: balance;
    margin: 0;
}

.page-title,
.prose > h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: 2.25rem;
}

.page-head { margin-bottom: 2.5rem; }
.page-intro {
    margin: 0 0 2.5rem;
    font-size: 1.0625rem;
    color: var(--ink-2);
}
.page-intro p { margin: 0 0 1rem; }
.page-meta {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    color: var(--ink-3);
    margin: 0.75rem 0 0;
    text-transform: lowercase;
}

/* ---------- home ---------- */

.kicker {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin: 0 0 1rem;
}

.home-title {
    font-size: clamp(2.5rem, 8vw, 3.75rem);
    line-height: 1;
    letter-spacing: -0.04em;
    margin: 0 0 1.25rem;
}
.home-title::after {
    content: '.';
    color: var(--ink-3);
}

.lede {
    font-size: 1.125rem;
    line-height: 1.65;
    color: var(--ink-2);
    max-width: 34rem;
}
.lede p { margin: 0; }

.home-section {
    margin-top: 4rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
}

.section-label,
.block-label {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin: 0 0 1rem;
}

.more {
    margin: 1.25rem 0 0;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}
.more a { text-decoration: none; color: var(--ink-3); }
.more a:hover { color: var(--ink); text-decoration: underline; }

.inline-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

/* ---------- entry lists (posts, notes, sources, concepts, search) ---------- */

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

.entry-list li {
    padding-block: 1.1rem;
    border-top: 1px solid var(--rule);
}
.entry-list li:first-child { border-top: 0; padding-top: 0; }

.entry-list .idx { display: none; }

.entry-list .date,
.entry-list .node-type {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    color: var(--ink-3);
    margin-right: 0.75rem;
}
.entry-list .node-type { color: var(--ink-3); opacity: 0.75; }
.entry-list .date + .node-type::before { content: '· '; }

.entry-list li > a {
    display: block;
    font-family: var(--serif);
    font-size: 1.0625rem;
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: -0.015em;
    text-decoration: none;
    text-wrap: pretty;
}
.entry-list li > a:hover {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

.entry-list .summary {
    margin: 0.4rem 0 0;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--ink-3);
    max-width: 34rem;
}

/* ---------- article ---------- */

.entry-head { margin-bottom: 2.5rem; }
.entry-head h1 { margin-bottom: 0.9rem; }

.meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.4rem 0.75rem;
    margin: 0;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    color: var(--ink-3);
}
.meta .dot { color: var(--rule-2); }
.meta a { color: var(--ink-3); text-decoration: none; }
.meta a:hover { color: var(--ink); text-decoration: underline; }

.prose { max-width: var(--measure); }

.prose > p,
.prose > ul,
.prose > ol,
.prose > blockquote,
.prose > table,
.prose > figure { margin-block: 0 1.35rem; }

.prose p { margin: 0 0 1.35rem; }

.prose h2 {
    font-size: 1.4375rem;
    margin: 3rem 0 1rem;
}
.prose h3 {
    font-size: 1.125rem;
    margin: 2.25rem 0 0.75rem;
}
.prose h4 {
    font-size: 1rem;
    font-family: var(--mono);
    font-weight: 700;
    letter-spacing: 0.02em;
    margin: 1.75rem 0 0.5rem;
}

.prose ul, .prose ol { padding-left: 1.35rem; margin: 0 0 1.35rem; }
.prose li { margin-block: 0.35rem; }
.prose li > ul, .prose li > ol { margin-block: 0.35rem; }

.prose strong { font-weight: 650; }

.prose blockquote {
    margin: 2rem 0;
    padding: 0.1rem 0 0.1rem 1.4rem;
    border-left: 1px solid var(--rule-2);
    color: var(--ink-2);
    font-family: var(--serif);
    font-style: italic;
    font-size: 1.0625rem;
}
.prose blockquote p:last-child { margin-bottom: 0; }

.prose img {
    margin-block: 2rem;
    border: 1px solid var(--rule);
}

.prose figure { margin-block: 2rem; }
.prose figcaption {
    margin-top: 0.6rem;
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--ink-3);
}

.prose code {
    font-family: var(--mono);
    font-size: 0.875em;
    background: var(--paper-soft);
    padding: 0.12em 0.34em;
    border-radius: 2px;
}

.prose pre {
    background: var(--paper-soft);
    border: 1px solid var(--rule);
    padding: 1.15rem 1.5rem 1.15rem 0.85rem;
    overflow-x: auto;
    margin: 0 0 1.75rem;
    line-height: 1.7;
    font-size: 0.875rem;
    tab-size: 4;
    -moz-tab-size: 4;
    font-variant-ligatures: none;
    scrollbar-width: thin;
    scrollbar-color: var(--rule-2) transparent;
}

.prose pre::-webkit-scrollbar { height: 8px; }
.prose pre::-webkit-scrollbar-thumb { background: var(--rule-2); border-radius: 4px; }
.prose pre::-webkit-scrollbar-track { background: transparent; }
.prose pre code {
    background: none;
    padding: 0;
    font-size: inherit;
    border-radius: 0;
}

.prose table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    margin: 0 0 1.75rem;
}
.prose th, .prose td {
    text-align: left;
    padding: 0.5rem 0.75rem 0.5rem 0;
    border-bottom: 1px solid var(--rule);
}
.prose th {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-3);
    border-bottom-color: var(--rule-2);
}

.prose hr {
    border: 0;
    height: 1px;
    background: var(--rule);
    margin: 3rem 0;
}

/* ---------- table of contents ---------- */

.toc {
    margin: 0 0 2.5rem;
    padding: 0 0 0.25rem;
    border-bottom: 1px solid var(--rule);
}
.toc > summary {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-3);
    cursor: pointer;
    padding-bottom: 0.75rem;
    list-style: none;
}
.toc > summary::-webkit-details-marker { display: none; }
.toc > summary::before { content: '+ '; }
.toc[open] > summary::before { content: '− '; }
.toc nav ul {
    list-style: none;
    margin: 0;
    padding: 0 0 1rem;
    font-size: 0.9375rem;
}
.toc nav ul ul { padding-left: 1rem; }
.toc nav li { margin: 0.3rem 0; }
.toc nav a { text-decoration: none; color: var(--ink-2); }
.toc nav a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- connection blocks ---------- */

.block {
    margin-top: 3rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
}

/* ---------- post footer nav ---------- */

.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    margin-top: 3rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
    font-size: 0.9375rem;
}
.post-nav a { text-decoration: none; color: var(--ink-2); }
.post-nav a:hover { color: var(--ink); text-decoration: underline; }
.post-nav .next { text-align: right; }

.back-link {
    display: inline-block;
    margin-top: 2.5rem;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-decoration: none;
    color: var(--ink-3);
}
.back-link:hover { color: var(--ink); text-decoration: underline; }

/* ---------- projects ---------- */

.projects-list {
    list-style: none;
    margin: 2rem 0 0;
    padding: 0;
}
.projects-list li {
    padding-block: 1.4rem;
    border-top: 1px solid var(--rule);
}
.project-title {
    font-family: var(--serif);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    text-decoration: none;
}
.project-title:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.project-desc {
    margin: 0.5rem 0 0;
    color: var(--ink-2);
    font-size: 0.9375rem;
    line-height: 1.6;
}
.project-stack {
    margin: 0.6rem 0 0;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
    color: var(--ink-3);
}

/* ---------- search ---------- */

.search-field {
    width: 100%;
    font-family: var(--mono);
    font-size: 1rem;
    color: var(--ink);
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--rule-2);
    padding: 0.6rem 0;
    margin-bottom: 0.5rem;
}
.search-field::placeholder { color: var(--ink-3); }
.search-field:focus {
    outline: none;
    border-bottom-color: var(--ink);
}

.search-hint {
    margin: 0 0 2.5rem;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
    color: var(--ink-3);
}

/* ---------- 404 ---------- */

.notfound { padding-block: 3rem; }
.notfound h1 {
    font-size: clamp(3rem, 12vw, 5rem);
    line-height: 1;
    letter-spacing: -0.05em;
    margin-bottom: 1.5rem;
}
.notfound p { color: var(--ink-3); margin: 0 0 0.75rem; }

/* ---------- misc ---------- */

.empty {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-3);
}

@media (max-width: 34rem) {
    .site-main { padding-block: 2.5rem 3.5rem; }
    .site-header { padding-block: 1.5rem; }
    .entry-list .date { display: block; margin-bottom: 0.25rem; }
    .post-nav { flex-direction: column; }
    .post-nav .next { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}

/* ---------- code blocks: copy button ---------- */

.code-block { position: relative; }

.code-tools {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    opacity: 0;
    transition: opacity 120ms ease;
}

.code-block:hover .code-tools,
.code-tools:focus-within { opacity: 1; }

@media (hover: none) { .code-tools { opacity: 1; } }

.copy-btn,
.lang-chip {
    font-family: var(--mono);
    font-size: 0.625rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-3);
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 2px;
    padding: 0.15rem 0.45rem;
    cursor: pointer;
}

.lang-chip { cursor: default; }

.copy-btn:hover { color: var(--ink); border-color: var(--rule-2); }

/* ---------- heading anchors ---------- */

.prose h2, .prose h3, .prose h4 { position: relative; }

.prose .anchor {
    position: absolute;
    left: -1.1em;
    top: 0;
    color: var(--rule-2);
    text-decoration: none;
    opacity: 0;
    font-weight: 400;
}

.prose h2:hover .anchor,
.prose h3:hover .anchor,
.prose h4:hover .anchor,
.prose .anchor:focus-visible { opacity: 1; color: var(--ink-3); }

/* ---------- caption line from the image render hook ---------- */

.post-caption {
    display: block;
    margin-top: 0.5rem;
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--ink-3);
}