.article-page {
    --article-width: 46rem;
    background: linear-gradient(180deg, #fff 0, #f7faff 46rem, var(--paper) 70rem);
}

.article-page .breadcrumbs { padding-top: 1rem; }

.article-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(20rem, .92fr);
    align-items: center;
    gap: clamp(2rem, 6vw, 5.5rem);
    min-height: min(47rem, calc(100svh - 8rem));
    padding-block: clamp(2.5rem, 7vw, 6rem);
}

.article-kicker { display: flex; flex-wrap: wrap; gap: .55rem; margin: 0 0 1.4rem; }
.article-kicker span { padding: .4rem .7rem; border-radius: 999px; color: var(--blue-700); background: var(--soft-blue); font-size: .75rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.article-hero h1 { max-width: 19ch; margin: 0; color: var(--navy-950); font-size: clamp(2.45rem, 5.6vw, 5.15rem); line-height: .97; letter-spacing: -.055em; text-wrap: balance; }
.article-hero__lede { max-width: 43rem; margin: 1.6rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.45vw, 1.3rem); line-height: 1.66; text-wrap: pretty; }

.article-byline { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1rem; margin-top: 2rem; }
.article-byline__avatar { display: grid; flex: 0 0 2.7rem; width: 2.7rem; height: 2.7rem; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(145deg, var(--blue-500), var(--navy-950)); font-weight: 850; }
.article-byline > p { display: grid; gap: .15rem; margin: 0 1rem 0 0; font-size: .84rem; }
.article-byline > p a { color: var(--navy-950); text-decoration: none; }
.article-byline > p a:hover { text-decoration: underline; }
.article-byline > p span { color: var(--muted); }
.article-byline dl { display: flex; flex-wrap: wrap; gap: .75rem 1.2rem; margin: 0; }
.article-byline dl div { display: grid; gap: .12rem; }
.article-byline dt { color: var(--muted); font-size: .68rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.article-byline dd { margin: 0; color: var(--ink); font-size: .8rem; font-weight: 700; }

.article-hero__media { overflow: hidden; margin: 0; border: .65rem solid #fff; border-radius: clamp(1rem, 2.3vw, 2rem); background: var(--soft-blue); box-shadow: var(--shadow); transform: rotate(1.15deg); }
.article-hero__media img { width: 100%; aspect-ratio: 1200 / 630; object-fit: cover; }

.article-layout { display: grid; grid-template-columns: minmax(11rem, 15rem) minmax(0, var(--article-width)) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; padding-block: clamp(4rem, 8vw, 8rem); }
.article-toc { position: sticky; top: 6rem; grid-column: 1; padding: 1.1rem 0 1.1rem 1rem; border-left: 2px solid var(--line); }
.article-toc > p { margin: 0 0 .75rem; color: var(--navy-950); font-size: .72rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.article-toc ol { display: grid; gap: .28rem; margin: 0; padding: 0; list-style: none; }
.article-toc li { font-size: .8rem; line-height: 1.35; }
.article-toc__level-3 { padding-left: .8rem; }
.article-toc a { display: block; padding: .32rem 0; color: var(--muted); text-decoration: none; transition: color .18s, transform .18s; }
.article-toc a:hover { color: var(--blue-700); transform: translateX(.18rem); }

.article-prose { grid-column: 2; color: #2f4357; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.05rem, 1.25vw, 1.18rem); line-height: 1.82; }
.article-prose > :first-child { margin-top: 0; }
.article-prose :is(h2, h3) { color: var(--navy-950); font-family: Inter, ui-sans-serif, "Segoe UI", sans-serif; line-height: 1.16; letter-spacing: -.035em; scroll-margin-top: 6rem; text-wrap: balance; }
.article-prose h2 { margin: 3.8rem 0 1.25rem; font-size: clamp(1.75rem, 3vw, 2.65rem); }
.article-prose h3 { margin: 2.6rem 0 .9rem; font-size: clamp(1.35rem, 2vw, 1.75rem); }
.article-prose p { margin: 0 0 1.45rem; }
.article-prose a { color: var(--blue-700); text-decoration-thickness: .09em; text-underline-offset: .14em; }
.article-prose strong { color: var(--navy-950); }
.article-prose :is(ul, ol) { margin: 0 0 1.65rem; padding-left: 1.45rem; }
.article-prose li { margin-block: .45rem; padding-left: .2rem; }
.article-prose blockquote { margin: 2rem 0; padding: .15rem 0 .15rem 1.35rem; border-left: .28rem solid var(--blue-500); color: var(--navy-900); font-size: 1.12em; font-style: italic; }
.article-prose blockquote p:last-child { margin-bottom: 0; }
.article-prose table { display: block; width: 100%; margin: 2rem 0; overflow-x: auto; border-collapse: collapse; font-family: Inter, ui-sans-serif, "Segoe UI", sans-serif; font-size: .9rem; line-height: 1.5; }
.article-prose th, .article-prose td { min-width: 8rem; padding: .75rem .85rem; border: 1px solid var(--line); text-align: left; }
.article-prose th { color: var(--navy-950); background: var(--soft-blue); }
.article-prose :not(pre) > code { padding: .16em .38em; border: 1px solid var(--line); border-radius: .35rem; color: #9b3057; background: #fff; font: .86em/1.45 "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

.article-code { overflow: hidden; margin: 2rem 0; border: 1px solid rgba(255, 255, 255, .12); border-radius: .9rem; color: #e8f1ff; background: #071a33; box-shadow: 0 1.1rem 2.5rem rgba(5, 32, 68, .15); font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.article-code__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 2.65rem; padding: .45rem .55rem .45rem 1rem; border-bottom: 1px solid rgba(255, 255, 255, .1); color: #9bb4d1; background: rgba(255, 255, 255, .035); font-size: .7rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.article-code__copy { min-height: 1.85rem; padding: .35rem .65rem; border: 1px solid rgba(255, 255, 255, .16); border-radius: .45rem; color: #dcecff; background: rgba(255, 255, 255, .06); cursor: pointer; font-size: .72rem; font-weight: 750; }
.article-code__copy:hover { background: rgba(255, 255, 255, .12); }
.article-code pre { margin: 0; overflow: auto; }
.article-code code { display: block; min-width: max-content; padding: 1.15rem 1.25rem 1.35rem; font: .82rem/1.72 "SFMono-Regular", Consolas, "Liberation Mono", monospace; tab-size: 4; }
.tok-keyword { color: #80bfff; }
.tok-string { color: #a6e3a1; }
.tok-number { color: #f6c177; }
.tok-comment { color: #8295ad; font-style: italic; }
.tok-function { color: #c4a7e7; }
.tok-tag { color: #eb6f92; }
.tok-property { color: #9ccfd8; }

.article-prose math { display: inline math; color: var(--navy-950); font-family: "Cambria Math", "STIX Two Math", serif; }
.article-prose math[display="block"] { display: block; max-width: 100%; margin: 2rem 0; padding: 1.2rem; overflow-x: auto; border: 1px solid var(--line); border-radius: .8rem; background: #fff; text-align: center; }

.article-page > .source-section, .article-page > .related-section { margin-top: clamp(1rem, 4vw, 3rem); }

@media (max-width: 64rem) {
    .article-layout { grid-template-columns: minmax(0, 1fr); }
    .article-toc { position: static; grid-column: 1; width: min(100%, var(--article-width)); margin-inline: auto; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: .8rem; background: #fff; }
    .article-toc ol { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1rem; }
    .article-prose { grid-column: 1; width: min(100%, var(--article-width)); margin-inline: auto; }
}

@media (max-width: 50rem) {
    .article-hero { grid-template-columns: 1fr; min-height: auto; padding-block: 2.5rem 4rem; }
    .article-hero h1 { max-width: 16ch; }
    .article-hero__media { width: min(100%, 36rem); transform: none; }
}

@media (max-width: 36rem) {
    .article-byline { align-items: flex-start; }
    .article-byline dl { width: 100%; padding-top: .5rem; }
    .article-layout { padding-block: 3.5rem 5rem; }
    .article-toc ol { grid-template-columns: 1fr; }
    .article-prose { font-size: 1.04rem; line-height: 1.76; }
    .article-code { margin-inline: -.35rem; }
}

@media (prefers-reduced-motion: reduce) {
    .article-toc a { transition: none; }
}