:root {
    --bg: #090b0f;
    --panel: #0f1318;
    --panel-2: #12171d;
    --line: #27313b;
    --line-strong: #3a4a59;
    --text: #d5dde6;
    --muted: #7f8b97;
    --accent: #9bb8cf;
    --accent-strong: #c8d8e6;
    --page-width: 1040px;
    --content-width: 760px;
}

* {
    box-sizing: border-box;
}

html {
    margin: 0;
    padding: 0;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: "IBM Plex Sans", sans-serif;
    line-height: 1.72;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: var(--accent-strong);
}

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

.page-shell {
    width: min(var(--page-width), calc(100vw - 28px));
    margin: 0 auto;
    padding: 20px 0 40px;
}

.site-header,
.site-main {
    width: 100%;
}

.site-header {
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
}

.site-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    padding: 0 0 14px;
}

.brand,
.site-header__meta,
.entry-meta,
.breadcrumbs,
.series-list,
.article-nav__link span {
    font-family: "IBM Plex Mono", monospace;
}

.brand {
    color: var(--accent-strong);
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
}

.site-header__meta {
    color: var(--muted);
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.site-main {
    padding: 0;
}

.home-section,
.article-page {
    border: 1px solid var(--line);
    background: var(--panel);
}

.home-section {
    padding: 0;
}

.entry-stack {
    display: grid;
}

.entry-card {
    padding: 22px 24px 24px;
    border-top: 1px solid var(--line);
    background: var(--panel);
}

.entry-card:first-child {
    border-top: 0;
}

.entry-card--series {
    background: var(--panel-2);
}

.entry-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin-bottom: 12px;
    color: var(--muted);
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.entry-card h3,
.article-header h1,
.series-panel h2 {
    margin: 0;
    font-size: clamp(1.35rem, 3vw, 2rem);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.08;
}

.entry-card h3 {
    margin-bottom: 10px;
}

.entry-copy {
    max-width: 44rem;
    margin: 0;
    color: var(--muted);
    font-size: 0.98rem;
}

.series-more {
    margin: 14px 0 0;
    color: var(--muted);
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.series-list {
    list-style: none;
    margin: 20px 0 0;
    padding: 0;
    display: grid;
    gap: 0;
    border-top: 1px solid var(--line);
}

.series-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 20px;
    padding: 11px 0;
    border-top: 1px solid var(--line);
    font-size: 0.88rem;
}

.series-list li:first-child {
    border-top: 0;
}

.series-list li span:last-child {
    color: var(--muted);
    white-space: nowrap;
}

.series-list .is-current span:first-child {
    color: var(--accent-strong);
}

.article-page {
    max-width: 920px;
    margin: 0 auto;
    padding: 28px 28px 32px;
}

.breadcrumbs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    color: var(--muted);
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.article-header {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 0 24px;
    border-bottom: 1px solid var(--line);
}

.article-header h1 {
    font-size: clamp(2rem, 6vw, 3.6rem);
    line-height: 1.02;
}

.series-panel {
    max-width: var(--content-width);
    margin: 24px auto 0;
    padding: 18px 20px;
    border: 1px solid var(--line);
    background: var(--panel-2);
}

.series-panel h2 {
    margin-bottom: 14px;
    font-size: 1.1rem;
}

.article-content {
    max-width: var(--content-width);
    margin: 32px auto 0;
    font-size: 1.08rem;
}

.article-content p,
.article-content ul,
.article-content ol,
.article-content blockquote,
.article-content table {
    margin: 0 0 1.45rem;
}

.article-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 0.15em;
}

.article-content a:hover {
    color: var(--accent-strong);
}

.article-content blockquote {
    padding-left: 16px;
    border-left: 2px solid var(--line-strong);
    color: var(--muted);
    font-style: italic;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    font-family: "IBM Plex Sans", sans-serif;
    font-size: 0.95rem;
}

.article-content th,
.article-content td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}

.article-nav {
    max-width: var(--content-width);
    margin: 40px auto 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.article-nav__link {
    display: block;
    padding: 16px 18px;
    border: 1px solid var(--line);
    background: var(--panel-2);
}

.article-nav__link span {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.article-nav__link strong {
    font-size: 1rem;
    font-weight: 500;
}

.article-nav__link--right {
    text-align: right;
}

@media (max-width: 780px) {
    .page-shell {
        width: min(var(--page-width), calc(100vw - 18px));
        padding-top: 14px;
    }

    .site-header__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .entry-card,
    .article-page {
        padding-left: 18px;
        padding-right: 18px;
    }

    .series-list li {
        flex-direction: column;
        gap: 3px;
    }

    .article-nav {
        grid-template-columns: 1fr;
    }

    .article-nav__link--right {
        text-align: left;
    }

    .article-content {
        font-size: 1rem;
    }
}