/* Alibek Kaliyev: serif reading text, plain navigation, and a rust link accent. */

:root {
    --paper: #f7f3ec;
    --paper-edge: #efe9de;
    --ink: #26221c;
    --ink-soft: #575046;
    --ink-faint: #8a8175;
    --rule: #d8d0c2;
    --accent: #9a4e2e;
    --accent-soft: rgba(154, 78, 46, 0.22);
    --sans: 'Helvetica Neue', Arial, sans-serif;
    --serif: 'Newsreader', Georgia, 'Times New Roman', serif;
    --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
    --max: 800px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--serif);
    font-size: 19px;
    line-height: 1.6;
    font-feature-settings: "liga", "kern", "onum";
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    position: relative;
    min-height: 100vh;
}

/* subtle paper grain */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
    background-image:
        radial-gradient(rgba(87, 73, 55, 0.05) 1px, transparent 1.2px),
        radial-gradient(rgba(60, 50, 38, 0.04) 1px, transparent 1.4px);
    background-size: 3px 3px, 7px 7px;
    background-position: 0 0, 1px 2px;
    mix-blend-mode: multiply;
}

/* faint edge vignette */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(ellipse at center, transparent 60%, var(--paper-edge) 100%);
    opacity: 0.5;
}

main {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
    padding: 72px 28px 80px;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-soft);
    transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover { color: var(--ink); border-bottom-color: var(--ink); }

a:focus-visible, summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

strong { font-weight: 600; }

/* ---- intro ---- */

h1 {
    font-family: var(--serif);
    font-optical-sizing: auto;
    font-size: clamp(44px, 8vw, 64px);
    font-weight: 500;
    letter-spacing: -0.015em;
    line-height: 1.05;
    margin: 0 0 10px;
}

.role {
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin: 0 0 36px;
}

.intro-row {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 44px;
    align-items: start;
}

.intro-text p { margin: 0 0 16px; max-width: 62ch; }

.portrait img {
    width: 180px;
    height: 180px;
    object-fit: cover;
    display: block;
    border: 1px solid var(--rule);
    filter: contrast(1.02) saturate(0.94);
}

.contact {
    font-family: var(--mono);
    font-size: 12.5px;
    line-height: 2;
    letter-spacing: 0.02em;
    color: var(--ink-faint);
    margin-top: 20px;
}

.contact a { color: var(--ink-soft); border-bottom-color: var(--accent-soft); }
.contact a:hover { color: var(--ink); }

/* ---- sections ---- */

.section-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    margin-top: 24px;
    font-family: var(--mono);
    font-size: 12.5px;
}

section { margin-top: 64px; scroll-margin-top: 24px; }

.section-intro {
    margin: 16px 0 0;
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 1.5;
}

h2 {
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 6px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--rule);
}

/* ---- news ---- */

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

.news li {
    display: grid;
    grid-template-columns: 92px 1fr;
    gap: 24px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--rule);
    align-items: baseline;
    font-size: 17px;
    line-height: 1.5;
}

.news .date {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.03em;
    color: var(--ink-faint);
    text-align: right;
    white-space: nowrap;
}

.news .what { color: var(--ink); }

.news-more { margin: 0; }

.news-more summary {
    list-style: none;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
    padding: 12px 0 2px;
    user-select: none;
}

.news-more summary::-webkit-details-marker { display: none; }

.news-more summary::before {
    content: "+";
    display: inline-block;
    width: 16px;
    color: var(--accent);
}

.news-more[open] summary::before { content: "−"; }

.news-more summary:hover { color: var(--accent); }

.news-more[open] .when-closed { display: none; }
.news-more:not([open]) .when-open { display: none; }

.news-more[open] summary { padding-bottom: 0; }

/* ---- selected work ---- */

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

.work li {
    padding: 22px 0;
    border-bottom: 1px dashed var(--rule);
}

.venue {
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 6px;
}

.work h3, .writing-list h2 {
    font-family: var(--serif);
    font-size: 21px;
    font-weight: 500;
    line-height: 1.3;
    margin: 0 0 6px;
}

.work h3 a, .writing-list h2 a { color: var(--ink); border-bottom: none; }
.work h3 a:hover, .writing-list h2 a:hover { color: var(--accent); }

.project-description {
    margin: 0;
    max-width: 68ch;
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 1.5;
}

.authors {
    font-size: 16px;
    font-style: italic;
    color: var(--ink-soft);
    line-height: 1.45;
    margin: 0;
}

.authors .me {
    font-style: normal;
    font-weight: 500;
    color: var(--ink);
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.links {
    font-family: var(--mono);
    font-size: 12.5px;
    margin: 8px 0 0;
}

.links a { color: var(--accent); border-bottom-color: transparent; }
.links a:hover { color: var(--ink); }

/* ---- footer ---- */

/* ---- writing ---- */

.section-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--rule);
}
.section-heading h2 { border: 0; margin: 0; }
.section-heading > a { font-family: var(--mono); font-size: 11px; white-space: nowrap; border: 0; }
.page-nav { display: flex; flex-wrap: wrap; gap: 12px 24px; font-family: var(--mono); font-size: 12px; margin-bottom: 56px; }
.page-nav a:first-child { margin-right: auto; }
.writing-header h1 { font-size: clamp(38px, 6vw, 52px); line-height: 1.12; max-width: 20ch; }
.writing-header .dek { font-size: 21px; line-height: 1.5; color: var(--ink-soft); margin: 22px 0; }
.post-meta { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); line-height: 1.8; }
.article-body { margin-top: 40px; }
.article-body h2 { font-family: var(--serif); font-size: 27px; line-height: 1.25; font-weight: 500; text-transform: none; letter-spacing: 0; color: var(--ink); border: 0; margin: 48px 0 18px; padding: 0; scroll-margin-top: 24px; }
.article-body h3 { font-size: 21px; font-weight: 500; line-height: 1.35; margin: 30px 0 12px; }
.article-body p { margin: 0 0 20px; }
.article-body code { font-family: var(--mono); font-size: 0.75em; overflow-wrap: anywhere; }
.article-body pre { padding: 22px; background: var(--paper-edge); border: 1px solid var(--rule); overflow-x: auto; line-height: 1.7; margin: 26px 0; }
.article-body pre code { font-size: 12px; overflow-wrap: normal; }
.article-body .caption { font-size: 15px; color: var(--ink-soft); line-height: 1.5; }
.article-toc { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 20px 0; margin: 30px 0; }
.article-toc p { margin: 0 0 10px; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; }
.article-toc ol { margin: 0; padding-left: 22px; font-size: 16px; columns: 2; column-gap: 32px; }
.article-toc li { padding: 3px 0; break-inside: avoid; }
.pipeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 28px 0 12px; padding: 24px 0; border-block: 1px solid var(--rule); list-style: none; }
.pipeline li { font-size: 16px; line-height: 1.4; }
.pipeline span { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.07em; color: var(--accent); margin-bottom: 8px; }
.article-sources { font-size: 15px; line-height: 1.7; padding-left: 22px; overflow-wrap: anywhere; }
.article-end { border-top: 1px solid var(--rule); margin-top: 40px; padding-top: 20px; font-size: 16px; }

@media (max-width: 640px) {
    .page-nav { margin-bottom: 38px; }
    .writing-header .dek { font-size: 19px; }
    .article-toc ol { columns: 1; }
    .pipeline { grid-template-columns: 1fr 1fr; gap: 24px; }
    .article-body pre { padding: 16px; }
}

.site-footer {
    margin-top: 72px;
}

.site-footer p {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--ink-faint);
    margin: 0;
}

.site-footer .site-disclaimer {
    margin-top: 12px;
    max-width: 64ch;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.6;
    letter-spacing: 0;
    color: var(--ink-soft);
}

/* ---- mobile ---- */

@media (max-width: 640px) {
    body { font-size: 18px; }
    main { padding: 48px 20px 64px; }

    .intro-row { grid-template-columns: 1fr; gap: 28px; }
    .portrait { order: -1; justify-self: center; }

    .news li { grid-template-columns: 1fr; gap: 2px; padding: 12px 0; }
    .news .date { text-align: left; }
}

.writing-list h2 { text-transform: none; letter-spacing: 0; border: 0; padding: 0; color: var(--ink); }

/* Reading navigation and keyboard access. */
.page-nav { padding-bottom: 20px; border-bottom: 1px solid var(--rule); margin-bottom: 40px; }
.page-nav a, .section-nav a { padding-block: 6px; }
.page-nav a[aria-current] { color: var(--ink); border-bottom-color: var(--ink); }
.section-heading > a { font-size: 14px; }
.news .date { font-size: 13px; font-variant-numeric: tabular-nums; }
h1, h2, h3 { text-wrap: pretty; }
.skip-link { position: absolute; left: 20px; top: -100px; z-index: 2; padding: 12px 16px; background: var(--paper); }
.skip-link:focus { top: 12px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; } }
main[tabindex="-1"]:focus, #article-text:focus { outline: none; }