/* Blog styles. Tokens, nav, buttons and footer mirror the inline styles in
   /index.html so the blog reads as the same site; keep them in step. */

:root {
    --bone:     #F2F0EA;
    --paper:    #FBFAF6;
    --card:     #FFFFFF;
    --ink:      #111317;
    --ink-2:    #5C5F69;
    --ink-3:    #9B9DA4;
    --body:     #2B2E35;
    --line:     rgba(17,19,23,0.12);
    --line-2:   rgba(17,19,23,0.06);
    --accent:   #2438FF;
    --accent-2: #1B2BD6;
    --warm:     #FF6A3D;
    --font-display: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-body:    'Inter', 'Helvetica Neue', Arial, sans-serif;
    --font-mono:    ui-monospace, 'SF Mono', Menlo, monospace;
    --r-card: 22px;
    --r-pill: 100px;
    --nav-h: 76px;
    --maxw: 1280px;
    --postw: 1120px;
    --ease: cubic-bezier(.2,.8,.2,1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body {
    background: var(--bone); color: var(--ink);
    font-family: var(--font-body); font-weight: 400; line-height: 1.6;
    overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 2.5rem; }
.wrap-post { max-width: calc(var(--postw) + 5rem); margin: 0 auto; padding: 0 2.5rem; }

body::after {
    content: ''; position: fixed; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    opacity: 0.035; mix-blend-mode: multiply; pointer-events: none; z-index: 9999;
}

.skip {
    position: absolute; left: 1rem; top: -100px; z-index: 2000;
    background: var(--ink); color: var(--bone); padding: 0.6rem 1rem; border-radius: var(--r-pill);
    font-family: var(--font-display); font-weight: 700; font-size: 0.75rem;
}
.skip:focus { top: 1rem; }

/* ─── TYPE HELPERS ─── */
.display { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; line-height: 0.98; }
.eyebrow {
    font-family: var(--font-display); font-weight: 700; font-size: 0.7rem;
    letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-2);
    display: inline-flex; align-items: center; gap: 0.6rem;
}
.eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--ink); }
.accent { color: var(--accent); }

/* ─── NAV ─── */
nav#nav {
    position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 1000;
    display: flex; align-items: center;
    transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
    border-bottom: 1px solid transparent;
}
nav#nav.scrolled {
    background: rgba(242,240,234,0.72);
    backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
    border-bottom: 1px solid var(--line-2);
}
.nav-inner { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 2.5rem; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.02em; }
.nav-logo .dot, .footer-logo .dot { color: var(--accent); }
.nav-links { display: flex; gap: 0.35rem; }
.nav-links a {
    font-family: var(--font-display); font-weight: 700; font-size: 0.72rem; letter-spacing: 0.04em;
    text-transform: uppercase; color: var(--ink-2); padding: 0.5rem 0.9rem; border-radius: var(--r-pill);
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--accent); }
.nav-cta {
    font-family: var(--font-display); font-weight: 700; font-size: 0.72rem; letter-spacing: 0.04em;
    text-transform: uppercase; background: var(--ink); color: var(--bone);
    padding: 0.7rem 1.3rem; border-radius: var(--r-pill);
    transition: transform 0.25s, background 0.25s, box-shadow 0.25s;
}
.nav-cta:hover { background: var(--accent); transform: translateY(-1px); box-shadow: 0 10px 30px rgba(36,56,255,0.28); }

.progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 1001; pointer-events: none; }
.progress span { display: block; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }

/* ─── BUTTONS ─── */
.btn {
    font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.03em; text-transform: uppercase;
    display: inline-flex; align-items: center; gap: 0.6rem; padding: 1rem 1.8rem; border-radius: var(--r-pill);
    transition: transform 0.25s, background 0.25s, color 0.25s, box-shadow 0.25s, border-color 0.25s;
    cursor: pointer; border: 1px solid transparent;
}
.btn .arr { transition: transform 0.3s; }
.btn:hover .arr { transform: translate(3px,-3px); }
.btn-fill { background: var(--ink); color: var(--bone); }
.btn-fill:hover { background: var(--accent); transform: translateY(-2px); box-shadow: 0 16px 40px rgba(36,56,255,0.3); }
.btn-line { border-color: var(--line); color: var(--ink); }
.btn-line:hover { border-color: var(--ink); transform: translateY(-2px); }

.pill {
    display: inline-flex; align-items: center;
    font-family: var(--font-display); font-weight: 700; font-size: 0.64rem; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--ink-2); border: 1px solid var(--line); border-radius: var(--r-pill); padding: 0.35rem 0.8rem;
    transition: color 0.3s, border-color 0.3s;
}

/* ─── INDEX ─── */
.blog-head { padding: calc(var(--nav-h) + 5rem) 2.5rem 3rem; }
.blog-head-grid { margin-top: 1.8rem; display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 3rem; align-items: end; }
.blog-title { font-size: clamp(2.6rem, 6.4vw, 5.4rem); max-width: 13ch; }
.blog-intro { color: var(--ink-2); font-size: 0.98rem; line-height: 1.75; max-width: 38ch; padding-bottom: 0.4rem; }

.filters { margin-top: 3.2rem; display: flex; flex-wrap: wrap; gap: 0.55rem; }
.filter {
    font-family: var(--font-display); font-weight: 700; font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--ink-2); background: transparent; border: 1px solid var(--line); border-radius: var(--r-pill);
    padding: 0.6rem 1.05rem; cursor: pointer; display: inline-flex; gap: 0.5rem; align-items: center;
    transition: color 0.2s, background 0.2s, border-color 0.2s;
}
.filter span { color: var(--ink-3); font-weight: 700; transition: color 0.2s; }
.filter:hover { color: var(--ink); border-color: var(--ink); }
.filter.is-on { background: var(--ink); border-color: var(--ink); color: var(--bone); }
.filter.is-on span { color: rgba(242,240,234,0.55); }

.post-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.card-item { display: flex; }
.card-item[hidden] { display: none; }
.post-card {
    position: relative; overflow: hidden; flex: 1;
    display: flex; flex-direction: column; gap: 1.1rem;
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card);
    padding: 2.2rem 2.2rem 1.8rem; min-height: 320px;
    transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.4s;
}
.post-card::after {
    content: ''; position: absolute; left: 0; top: 0; height: 100%; width: 3px;
    background: linear-gradient(var(--accent), var(--warm));
    transform: scaleY(0); transform-origin: top; transition: transform 0.45s ease;
}
.post-card:hover { transform: translateY(-6px); box-shadow: 0 30px 60px rgba(17,19,23,0.10); border-color: transparent; }
.post-card:hover::after { transform: scaleY(1); }
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.card-flag {
    font-family: var(--font-display); font-weight: 700; font-size: 0.64rem; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--accent); display: inline-flex; align-items: center; gap: 0.45rem;
}
.card-flag::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.card-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.35rem, 2.1vw, 1.7rem); letter-spacing: -0.02em; line-height: 1.12; }
.card-excerpt { color: var(--ink-2); font-size: 0.92rem; line-height: 1.7; }
.card-foot {
    margin-top: auto; padding-top: 1.1rem; border-top: 1px solid var(--line-2);
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
    font-family: var(--font-display); font-weight: 700; font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2);
}
.card-go {
    flex-shrink: 0; width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
    border: 1px solid var(--line); color: var(--ink); font-size: 0.95rem;
    transition: background 0.35s, color 0.35s, border-color 0.35s, transform 0.35s;
}
.post-card:hover .card-go { background: var(--accent); border-color: var(--accent); color: #fff; transform: rotate(45deg); }

/* Newest post spans the row while the grid is unfiltered. */
.post-grid:not(.is-filtered) .is-featured { grid-column: 1 / -1; }
.post-grid:not(.is-filtered) .is-featured .post-card {
    background: var(--ink); color: var(--bone); border-color: var(--ink); min-height: 360px; padding: 2.8rem 3rem 2.2rem;
}
.post-grid:not(.is-filtered) .is-featured .card-title { font-size: clamp(1.9rem, 3.6vw, 3.1rem); line-height: 1.02; letter-spacing: -0.03em; max-width: 22ch; }
.post-grid:not(.is-filtered) .is-featured .card-excerpt { color: rgba(242,240,234,0.68); font-size: 1rem; max-width: 60ch; }
.post-grid:not(.is-filtered) .is-featured .pill { color: rgba(242,240,234,0.8); border-color: rgba(242,240,234,0.22); }
.post-grid:not(.is-filtered) .is-featured .card-flag { color: #8896ff; }
.post-grid:not(.is-filtered) .is-featured .card-flag::before { background: #8896ff; }
.post-grid:not(.is-filtered) .is-featured .card-foot { color: rgba(242,240,234,0.6); border-color: rgba(242,240,234,0.14); }
.post-grid:not(.is-filtered) .is-featured .card-go { color: var(--bone); border-color: rgba(242,240,234,0.25); }
.post-grid:not(.is-filtered) .is-featured .post-card:hover { box-shadow: 0 30px 70px rgba(17,19,23,0.28); }

.post-grid.is-compact .post-card { min-height: 0; padding: 1.8rem 1.8rem 1.5rem; }
.post-grid.is-compact .card-title { font-size: 1.3rem; }

.blog-foot { margin: 3rem 0 7rem; color: var(--ink-2); font-size: 0.9rem; }
.blog-foot a, .empty a { color: var(--accent); font-weight: 600; border-bottom: 1px solid currentColor; }
.empty { border: 1px solid var(--line); border-radius: var(--r-card); background: var(--paper); padding: 4rem 2rem; text-align: center; display: grid; gap: 1rem; justify-items: center; color: var(--ink-2); }

/* ─── ARTICLE ─── */
.post-head { padding-top: calc(var(--nav-h) + 4rem); padding-bottom: 3.5rem; }
.crumbs {
    display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap;
    font-family: var(--font-display); font-weight: 700; font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3);
}
.crumbs a { color: var(--ink-2); transition: color 0.2s; }
.crumbs a:hover { color: var(--accent); }
.post-title { margin-top: 1.6rem; font-size: clamp(2.2rem, 5.2vw, 4.4rem); line-height: 1.0; max-width: 20ch; text-wrap: balance; }
.post-dek { margin-top: 1.6rem; font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--ink-2); max-width: 46ch; line-height: 1.55; text-wrap: pretty; }
.post-meta {
    margin-top: 2.6rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
    display: flex; justify-content: space-between; align-items: center; gap: 1.6rem 3rem; flex-wrap: wrap;
}
.byline { display: inline-flex; align-items: center; gap: 0.85rem; }
.byline-name { display: block; font-weight: 600; font-size: 0.92rem; }
.byline-role { display: block; font-size: 0.8rem; color: var(--ink-2); }
.byline:hover .byline-name { color: var(--accent); }
.avatar {
    flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%;
    background: var(--ink); color: var(--bone); display: grid; place-items: center;
    font-family: var(--font-display); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.02em;
    box-shadow: inset 0 -3px 0 var(--accent);
}
.avatar.is-lg { width: 60px; height: 60px; font-size: 1rem; }
.meta-list { display: flex; gap: 2.4rem; flex-wrap: wrap; }
.meta-list dt {
    font-family: var(--font-display); font-weight: 700; font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3);
}
.meta-list dd { font-size: 0.88rem; font-weight: 500; margin-top: 0.15rem; }

.post-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 5rem; align-items: start; padding-bottom: 5rem; }
.toc { position: sticky; top: calc(var(--nav-h) + 2rem); padding-top: 0.4rem; }
.toc-label { font-family: var(--font-display); font-weight: 700; font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 1rem; }
.toc ol { border-left: 1px solid var(--line); }
.toc a {
    display: block; margin-left: -1px; padding: 0.42rem 0 0.42rem 1rem; border-left: 1px solid transparent;
    font-size: 0.8rem; line-height: 1.4; color: var(--ink-2);
    transition: color 0.2s, border-color 0.2s;
}
.toc a:hover { color: var(--ink); }
.toc a.is-current { color: var(--accent); border-left-color: var(--accent); }

.prose { max-width: 680px; font-size: 1.075rem; line-height: 1.78; color: var(--body); }
.prose > * + * { margin-top: 1.25em; }
.prose h2 {
    font-family: var(--font-display); font-weight: 700; color: var(--ink);
    font-size: clamp(1.55rem, 2.8vw, 2.1rem); line-height: 1.1; letter-spacing: -0.025em;
    margin-top: 2.2em; text-wrap: balance; scroll-margin-top: calc(var(--nav-h) + 1.5rem);
}
.prose h3 {
    font-family: var(--font-display); font-weight: 700; color: var(--ink);
    font-size: 1.2rem; line-height: 1.3; letter-spacing: -0.01em; margin-top: 2em;
    scroll-margin-top: calc(var(--nav-h) + 1.5rem);
}
.prose h2 + *, .prose h3 + * { margin-top: 0.7em; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color 0.2s, text-decoration-color 0.2s; }
.prose a:hover { color: var(--accent-2); text-decoration-thickness: 2px; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose ul { list-style: none; }
.prose ul li { position: relative; }
.prose ul li::before { content: ''; position: absolute; left: -1.15rem; top: 0.78em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.prose ol { list-style: decimal; }
.prose ol li::marker { font-family: var(--font-display); font-weight: 700; color: var(--accent); }
.prose li + li { margin-top: 0.6em; }
.prose code { font-family: var(--font-mono); font-size: 0.86em; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 0.08em 0.4em; color: var(--ink); }
.prose em { font-style: italic; }

.prose .answer {
    position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 18px;
    padding: 1.7rem 1.9rem 1.7rem 2.1rem; font-size: 1.12rem; line-height: 1.72; color: var(--ink);
    box-shadow: 0 20px 50px rgba(17,19,23,0.05);
}
.prose .answer::before { content: ''; position: absolute; left: 0; top: 1.6rem; bottom: 1.6rem; width: 3px; border-radius: 0 3px 3px 0; background: linear-gradient(var(--accent), var(--warm)); }
.prose .answer > strong:first-child {
    display: block; margin-bottom: 0.55rem;
    font-family: var(--font-display); font-weight: 700; font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
}

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
.prose table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 0.88rem; line-height: 1.5; }
.prose th {
    text-align: left; padding: 0.95rem 1.1rem; background: var(--paper); border-bottom: 1px solid var(--line);
    font-family: var(--font-display); font-weight: 700; font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2);
}
.prose td { padding: 0.95rem 1.1rem; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.prose tr:last-child td { border-bottom: none; }
.prose td:first-child { font-weight: 600; color: var(--ink); }

.post-faq { margin-top: 3.4em; padding-top: 0.2em; }
.post-faq h2 { margin-top: 0; }
.faq-entry { padding: 1.5rem 0; border-top: 1px solid var(--line); }
.faq-entry:last-child { border-bottom: 1px solid var(--line); }
.faq-entry h3 { margin-top: 0; font-size: 1.1rem; }
.faq-entry p { margin-top: 0.5em; color: var(--ink-2); font-size: 0.98rem; line-height: 1.75; }

.signoff { margin-top: 2.4rem; color: var(--ink-2); font-size: 1rem; }
.signoff em { font-style: normal; }

.author-card {
    margin-top: 2.6rem; display: flex; gap: 1.2rem; align-items: flex-start;
    background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 1.6rem 1.7rem;
}
.author-name { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--ink); }
.author-bio { margin-top: 0.3rem; font-size: 0.9rem; line-height: 1.65; color: var(--ink-2); }
.author-bio a { font-weight: 600; text-decoration: none; }

.cta-card { margin-bottom: 5rem; }
.cta-inner {
    display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: end;
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 3.4rem;
    position: relative; overflow: hidden;
}
.cta-inner::before { content: ''; position: absolute; width: 520px; height: 520px; right: -160px; top: -260px; border-radius: 50%; background: radial-gradient(circle, rgba(36,56,255,0.10), transparent 62%); pointer-events: none; }
.cta-title { margin-top: 1.3rem; font-size: clamp(2.2rem, 5vw, 4rem); }
.cta-side { position: relative; }
.cta-side p { color: var(--ink-2); line-height: 1.7; max-width: 42ch; }
.cta-actions { margin-top: 1.6rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }
.cta-mail { display: inline-block; margin-top: 1.3rem; color: var(--accent); font-weight: 600; font-size: 0.9rem; border-bottom: 1px solid currentColor; }

.section-label { margin-bottom: 1.6rem; }
.concepts, .related { margin-bottom: 5rem; }
.concept-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.concept {
    display: grid; gap: 0.2rem; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 0.6rem 0.6rem 1.1rem;
    transition: transform 0.4s var(--ease), box-shadow 0.4s;
}
.concept:hover { transform: translateY(-4px); box-shadow: 0 24px 50px rgba(17,19,23,0.10); }
.concept picture { display: block; aspect-ratio: 16 / 10; overflow: hidden; border-radius: 12px; margin-bottom: 0.8rem; background: var(--bone); }
.concept img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.concept-name { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; padding: 0 0.5rem; }
.concept-kind { font-size: 0.8rem; color: var(--ink-2); padding: 0 0.5rem; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; padding-bottom: 7rem; }
.pager-link { display: grid; gap: 0.5rem; padding: 1.6rem 0; border-top: 1px solid var(--ink); transition: color 0.2s; }
.pager-link.is-next { text-align: right; }
.pager-dir { font-family: var(--font-display); font-weight: 700; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); }
.pager-title { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.015em; line-height: 1.25; }
.pager-link:hover .pager-title { color: var(--accent); }

/* ─── FOOTER ─── */
footer { border-top: 1px solid var(--line); padding: 3rem 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.footer-logo { font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.06em; }
.footer-meta { font-size: 0.78rem; color: var(--ink-2); }
.footer-links { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.footer-links a {
    font-family: var(--font-display); font-weight: 700; font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2);
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

/* ─── REVEAL (JS only, so content never hides without it) ─── */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1000px) {
    .post-layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .post-layout { padding-bottom: 4rem; }
    .toc { display: none; }
    .prose { margin: 0 auto; }
    .blog-head-grid { grid-template-columns: 1fr; gap: 1.4rem; }
    .cta-inner { grid-template-columns: 1fr; gap: 1.6rem; padding: 2.6rem; }
}
@media (max-width: 720px) {
    .wrap, .wrap-post, .nav-inner { padding-left: 1.4rem; padding-right: 1.4rem; }
    .blog-head { padding: calc(var(--nav-h) + 2.6rem) 1.4rem 2rem; }
    .nav-links { display: none; }
    .post-grid { grid-template-columns: 1fr; gap: 1rem; }
    .post-card { padding: 1.7rem 1.5rem 1.4rem; min-height: 0; }
    .post-grid:not(.is-filtered) .is-featured .post-card { padding: 2rem 1.6rem 1.6rem; min-height: 0; }
    .post-head { padding-top: calc(var(--nav-h) + 2.4rem); padding-bottom: 2.4rem; }
    .post-meta { flex-direction: column; align-items: flex-start; }
    .meta-list { gap: 1.2rem 1.8rem; }
    .prose { font-size: 1.02rem; }
    .prose .answer { padding: 1.4rem 1.3rem 1.4rem 1.6rem; font-size: 1.04rem; }
    .concept-row { grid-template-columns: 1fr; }
    .concept { grid-template-columns: 120px 1fr; column-gap: 1rem; align-items: center; padding: 0.6rem; }
    .concept picture { grid-row: span 2; margin: 0; }
    .concept-name, .concept-kind { padding: 0; }
    .pager { grid-template-columns: 1fr; gap: 0; padding-bottom: 4.5rem; }
    .pager-link.is-next { text-align: left; }
    .cta-inner { padding: 2rem 1.5rem; }
    .cta-card, .concepts, .related { margin-bottom: 3.5rem; }
    .footer-inner { flex-direction: column; align-items: flex-start; gap: 1.4rem; }
    .filters { margin-top: 2.2rem; flex-wrap: nowrap; overflow-x: auto; margin-right: -1.4rem; padding-right: 1.4rem; scrollbar-width: none; }
    .filters::-webkit-scrollbar { display: none; }
    .filter { flex-shrink: 0; }
}
@media (max-width: 480px) {
    .nav-inner { padding-left: 1.1rem; padding-right: 1.1rem; }
    .nav-logo { font-size: 0.95rem; }
    .nav-cta { padding: 0.6rem 0.95rem; font-size: 0.66rem; }
    .btn { padding: 0.85rem 1.35rem; font-size: 0.74rem; }
    .card-foot { font-size: 0.62rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .js .reveal { opacity: 1; transform: none; transition: none; }
    .post-card, .post-card::after, .card-go, .concept, .btn, .nav-cta { transition: none !important; }
    .post-card:hover, .concept:hover, .btn:hover { transform: none !important; }
}