/* YamaStudio developer blog — same visual system as the studio site. */
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600&family=Barlow:wght@400;500;600&family=JetBrains+Mono:wght@400;600&family=Zen+Kaku+Gothic+New:wght@400;500;700&display=swap');

:root {
    --bg: #090909;
    --ink: #f4f3ef;
    --muted: #c4c0b6;
    --text-muted: #c4c0b6;
    --text-primary: #f4f3ef;
    --text-secondary: #c4c0b6;
    --line: rgba(244, 243, 239, 0.16);
    --border-color: rgba(244, 243, 239, 0.16);
    --signal: #e4ff4a;
    --accent-green: #e4ff4a;
    --accent-cyan: #f4f3ef;
    --accent-yellow: #e4ff4a;
    --accent-orange: #ffb4a8;
    --bg-primary: #090909;
    --bg-secondary: #141414;
    --bg-tertiary: #1c1c1c;
    --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    padding: 72px 0 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Zen Kaku Gothic New", "Barlow", sans-serif;
    font-weight: 400;
    line-height: 1.75;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
a:hover { color: var(--signal); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
::selection { background: var(--signal); color: #141414; }

.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 {
    position: absolute;
    left: 16px;
    top: -48px;
    z-index: 40;
    background: var(--signal);
    color: #141414;
    padding: 8px 12px;
    text-decoration: none;
}
.skip:focus { top: 12px; }

.wrap { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 20;
    height: var(--header-h);
    background: rgba(9, 9, 9, 0.96);
    border-bottom: 1px solid var(--line);
}
.header-bar {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: "Barlow Condensed", sans-serif;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 1.7rem;
    line-height: 1;
    color: var(--ink);
    text-decoration: none;
}
.wordmark img { width: 40px; height: 40px; flex: none; border: 0; background: transparent; }
.wordmark:hover { color: var(--ink); opacity: 0.75; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a {
    text-decoration: none;
    font-family: "Barlow", sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
}
.site-nav a[aria-current="page"] { color: var(--signal); }
.nav-toggle {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}
.nav-toggle-label { display: none; }

.blog-subnav {
    border-bottom: 1px solid var(--line);
    background: #0c0c0c;
}
.blog-subnav .wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    padding: 12px 0;
}
.blog-subnav a { text-decoration: none; font-size: 0.92rem; color: var(--muted); font-weight: 500; }
.blog-subnav a:hover { color: var(--signal); }

.hero, .topic-nav { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.hero { padding: 56px 0 36px; }
.hero-eyebrow, .kicker, .section-heading {
    margin: 0 0 12px;
    font-family: "Barlow", sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--signal);
}
.hero h1 {
    margin: 0 0 16px;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.12;
    letter-spacing: -0.03em;
    font-weight: 700;
}
.highlight { color: var(--signal); }
.hero-desc, .hero-lead { margin: 0; max-width: 40rem; color: var(--muted); }
.hero .summary { margin-top: 18px; }
.hero .summary a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 16px;
    background: transparent;
    border: 1px solid var(--line);
    text-decoration: none;
    font-weight: 700;
}
.hero .summary a:hover { border-color: var(--signal); color: var(--signal); }

.topic-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 28px;
}
.topic-nav a {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-height: 72px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    text-decoration: none;
    background: #101010;
}
.topic-nav a:hover { border-color: var(--signal); color: var(--ink); }
.topic-nav span { font-weight: 700; }
.topic-nav small { color: var(--muted); font-size: 0.82rem; }

.container {
    width: min(1120px, calc(100% - 48px));
    margin: 12px auto 72px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: start;
}
.page-container {
    width: min(760px, calc(100% - 48px));
    margin: 48px auto 80px;
}
.page-container h1, .article-content h1 {
    margin: 0 0 18px;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.25;
    letter-spacing: -0.03em;
}
.page-container h2, .article-content h2 {
    margin: 2.2rem 0 0.7rem;
    font-size: 1.35rem;
    line-height: 1.35;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--line);
}
.page-container h3, .article-content h3 { margin: 1.6rem 0 0.45rem; font-size: 1.08rem; }
.page-container p, .page-container li,
.article-content p, .article-content li { color: var(--muted); }
.article-content { max-width: 68ch; }
.article-content strong, .page-container strong { color: var(--ink); }
.article-content a, .page-container a, .breadcrumb a { text-underline-offset: 0.18em; }
.breadcrumb { margin: 0 0 18px; color: var(--muted); font-size: 0.88rem; }
.date { color: var(--muted); font-family: "Barlow", sans-serif; font-size: 0.92rem; letter-spacing: 0.03em; }
.summary { color: var(--muted); }
.lead { color: var(--muted); }

.post-list-item {
    padding: 22px 0;
    border-top: 1px solid var(--line);
}
.post-list-item h3 { margin: 0 0 8px; font-size: 1.15rem; line-height: 1.4; }
.post-list-item h3 a { text-decoration: none; }
.read-more { display: inline-block; margin-top: 8px; font-weight: 700; text-decoration: none; }

.container > aside {
    position: sticky;
    top: 88px;
    padding: 8px 0 24px;
    font-size: 0.92rem;
}
.container > aside h3 {
    margin: 28px 0 10px;
    font-family: "Barlow", sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--signal);
}
.container > aside ul { list-style: none; margin: 0; padding: 0; }
.container > aside li { margin: 0; padding: 7px 0; border-bottom: 1px solid var(--line); }
.container > aside a { text-decoration: none; }
.container > aside img {
    width: 72px;
    height: auto;
    border: 0;
    background: transparent;
    margin-bottom: 10px;
}

.article-content img, .article-content figure img { width: auto; max-width: 100%; height: auto; border: 0; }
.article-content figure { margin: 1.4rem 0; }
.article-content figcaption { margin-top: 8px; color: var(--muted); font-size: 0.88rem; }
.article-content ul, .article-content ol, .page-container ul, .page-container ol { padding-left: 1.2rem; }
.article-content pre, .page-container pre {
    overflow-x: auto;
    padding: 14px 16px;
    background: #141414;
    border: 1px solid var(--line);
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.86rem;
    line-height: 1.6;
    color: var(--ink);
}
.article-content code, .page-container code {
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.9em;
}
.article-content :not(pre) > code, .page-container :not(pre) > code {
    padding: 0.1em 0.35em;
    background: #161616;
    border: 1px solid var(--line);
}
.article-content table, .page-container table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0 1.4rem;
    font-size: 0.95rem;
}
.article-content th, .article-content td,
.page-container th, .page-container td {
    padding: 8px 10px;
    border: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}
.article-content th, .page-container th { background: #141414; color: var(--ink); }
.callout {
    margin: 1.2rem 0 1.6rem;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-left: 3px solid var(--signal);
    background: #141414;
}
aside.callout { position: static; width: auto; max-width: none; }
.article-author, .related-articles {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}
.related-articles ul { list-style: none; padding-left: 0; }
.related-articles li { margin: 0.4rem 0; }

.site-footer { border-top: 1px solid var(--line); margin-top: 24px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1.4fr 0.8fr;
    gap: 32px;
    padding: 56px 0 28px;
}
.footer-grid p { margin: 0; color: var(--muted); }
.footer-label {
    margin: 0 0 10px;
    font-family: "Barlow", sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--signal);
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid a { display: inline-block; padding: 4px 0; text-decoration: none; }
.footer-base {
    border-top: 1px solid var(--line);
    padding: 18px 0 36px;
    color: var(--muted);
    font-size: 0.88rem;
}
.footer-base p { margin: 0 0 6px; }
.footer-base a { font-weight: 700; }

@media (max-width: 900px) {
    .wrap, .hero, .topic-nav, .container, .page-container { width: min(1120px, calc(100% - 32px)); }
    .topic-nav, .footer-grid, .container { grid-template-columns: 1fr 1fr; }
    .container > aside { position: static; }
}
@media (max-width: 720px) {
    .nav-toggle-label {
        display: grid;
        width: 44px;
        height: 44px;
        place-content: center;
        gap: 5px;
        cursor: pointer;
    }
    .nav-toggle-label span:not(.sr-only) {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--ink);
    }
    .nav-toggle:checked + .nav-toggle-label span:nth-child(2) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle:checked + .nav-toggle-label span:nth-child(3) { opacity: 0; }
    .nav-toggle:checked + .nav-toggle-label span:nth-child(4) { transform: translateY(-7px) rotate(-45deg); }
    .site-nav {
        display: none;
        position: fixed;
        inset: var(--header-h) 0 0 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 12px 24px 32px;
        background: #090909;
        overflow: auto;
    }
    .nav-toggle:checked ~ .site-nav { display: flex; }
    .site-nav a { font-size: 1.7rem; padding: 12px 0; }
    body:has(.nav-toggle:checked) { overflow: hidden; }
    .topic-nav, .footer-grid, .container { grid-template-columns: 1fr; }
    .article-content table, .page-container table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}