/* ========================================================================
   adpsagent.com  ·  style.css   v0.1
   Agent Design Patterns Society — research community site.
   Cool palette (deep blue + brass) for institutional / society feel.
   Structural CSS forked from kage-ai.com v0.7, colors re-themed.
   ======================================================================== */

:root {
    --color-bg: #fafaf9;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-text-faint: #94a3b8;
    --color-link: #0f3a5f;
    --color-link-hover: #1e5a8a;
    --color-rule: #e2e8f0;
    --color-quote-bg: #f1f5f9;
    --color-badge: #b8842b;
    --color-badge-bg: #fdf6e3;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
        "Noto Sans SC", Helvetica, Arial, sans-serif;
    --font-serif: "Iowan Old Style", "Apple Garamond", Baskerville,
        "Times New Roman", "Droid Serif", Times, "Source Serif Pro",
        serif;
    --font-mono: "SF Mono", "Fira Code", Menlo, Consolas, monospace;

    --measure: 38rem;       /* ~640px reading width */
    --container: 56rem;     /* ~896px outer */
}

/* --- reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; }
@media (min-width: 768px) { html { font-size: 18px; } }

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; display: block; }

a {
    color: var(--color-link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.15s ease;
}
a:hover { color: var(--color-link-hover); }

ul, ol { list-style: none; }

hr {
    border: 0;
    border-top: 1px solid var(--color-rule);
    margin: 2.5rem 0;
}

::selection { background: var(--color-badge-bg); color: var(--color-text); }

/* --- layout --- */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* --- header --- */
.site-header {
    border-bottom: 1px solid var(--color-rule);
    padding: 1rem 0;
    margin-bottom: 2.5rem;
}
.site-header .container {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.site-brand {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.01em;
}
.site-brand:hover { color: var(--color-link); }
.site-nav {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}
.site-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
}
.site-nav a:hover { color: var(--color-link); }
.site-nav .lang-switch {
    border-left: 1px solid var(--color-rule);
    padding-left: 1.25rem;
}

/* --- intro / blocks --- */
.content { padding-bottom: 4rem; }

/* EN homepage widens .intro / .block to container width to align with /zh/.
   Writing/about/books pages keep --measure (narrow reading column). */
.page-home .intro,
.page-home .block { max-width: var(--container); }

/* Research pages widen .writing-index to container width — research has
   matrices, heatmaps, framework cards that need horizontal room. */
.page-research .writing-index { max-width: var(--container); }
.page-research .writing-list li { max-width: 50rem; }
.page-training .block,
.page-training .training-hero,
.page-training .training-visual { max-width: var(--container); }

/* Writing pages: bump essay + writing-index from the narrow --measure
   to a roomier 52rem. Still readable prose, but no longer cramped. */
.page-essay article.essay { max-width: 52rem; }
.page-essay .writing-index { max-width: 52rem; }

/* Dual-axis page: lift article.essay's default narrow column (38rem) up
   to the container width, so the 7x6 matrix and prose sit at the same
   width as the other research detail pages. */
.page-dualaxis article.essay { max-width: var(--container); }

.intro {
    margin-bottom: 3rem;
    max-width: var(--measure);
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 1.25rem;
    align-items: start;
}
.intro-avatar {
    width: 80px; height: 80px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-quote-bg);
    border: 2px solid var(--color-rule);
}
.intro-avatar img,
.intro-avatar svg { width: 100%; height: 100%; object-fit: cover; }
.intro-text { min-width: 0; }
.intro-text h1 {
    font-size: 1.85rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
    line-height: 1.15;
}
.intro-role {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}
.lede {
    font-size: 1.02rem;
    color: var(--color-text);
    margin-bottom: 1rem;
    line-height: 1.65;
}
.lede em a {
    color: var(--color-link);
    font-style: italic;
}
.lede strong {
    color: var(--color-text);
    font-weight: 600;
}

@media (max-width: 600px) {
    .intro { grid-template-columns: 64px 1fr; gap: 1rem; }
    .intro-avatar { width: 64px; height: 64px; }
    .intro-text h1 { font-size: 1.55rem; }
}

.block {
    margin-bottom: 3rem;
    max-width: var(--measure);
}
.block h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-rule);
    padding-bottom: 0.4rem;
}
.block p { margin-bottom: 1rem; line-height: 1.65; }

/* --- post list --- */
.post-list { margin-bottom: 1rem; }
.post-list li {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 0.75rem;
    padding: 0.55rem 0;
    border-bottom: 1px dotted var(--color-rule);
    align-items: baseline;
}
.post-list li:last-child { border-bottom: 0; }
.post-date {
    font-size: 0.85rem;
    color: var(--color-text-faint);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}
.post-list a {
    color: var(--color-text);
    text-decoration: none;
}
.post-list a:hover {
    color: var(--color-link);
    text-decoration: underline;
}
.post-list .post-blurb {
    grid-column: 2;
    color: var(--color-text-muted);
    font-size: 0.92rem;
    margin-top: 0.2rem;
    line-height: 1.5;
}
.more-link {
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

@media (max-width: 600px) {
    .post-list li { grid-template-columns: 1fr; }
    .post-list .post-blurb { grid-column: 1; }
}

/* --- book list --- */
.book-list li {
    padding: 0.65rem 0;
    border-bottom: 1px dotted var(--color-rule);
    line-height: 1.55;
}
.book-list li:last-child { border-bottom: 0; }
.book-list strong { font-weight: 600; }

.badge {
    display: inline-block;
    font-size: 0.74rem;
    font-weight: 500;
    background: var(--color-badge-bg);
    color: var(--color-badge);
    padding: 0.12rem 0.5rem;
    border-radius: 3px;
    margin-left: 0.4rem;
    vertical-align: middle;
    letter-spacing: 0.02em;
}

/* --- subscribe block --- */
.subscribe {
    background: var(--color-quote-bg);
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--color-rule);
}
.subscribe h2 {
    border-bottom: 0;
    padding-bottom: 0;
    margin-bottom: 0.6rem;
}
.subscribe-iframe-wrap {
    margin-top: 1rem;
    background: #fff;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--color-rule);
}
.subscribe-iframe-wrap iframe {
    border: 0;
    width: 100%;
    height: 320px;
    display: block;
}
.cta {
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px solid var(--color-link);
    padding-bottom: 1px;
}
.cta:hover { border-bottom-color: var(--color-link-hover); }

/* --- training / cases pages --- */
.training-hero {
    margin: 2.5rem 0 2rem;
}
.eyebrow {
    color: var(--color-link);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.55rem;
    text-transform: uppercase;
}
.training-hero h1 {
    font-size: 2.1rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    max-width: 44rem;
}
.training-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}
.btn {
    background: var(--color-link);
    border: 1px solid var(--color-link);
    border-radius: 4px;
    color: #fff;
    display: inline-block;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.58rem 0.95rem;
    text-decoration: none;
}
.btn:hover {
    background: var(--color-link-hover);
    border-color: var(--color-link-hover);
    color: #fff;
    text-decoration: none;
}
.btn-secondary {
    background: transparent;
    color: var(--color-link);
}
.btn-secondary:hover {
    background: var(--color-badge-bg);
    color: var(--color-link-hover);
}
.training-visual {
    margin: 1.5rem 0 2.5rem;
}
.training-visual img,
.training-card img,
.training-split img {
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    width: 100%;
}
.training-section {
    margin-top: 2.5rem;
}
.training-grid {
    display: grid;
    gap: 1.2rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1.25rem;
}
.training-card {
    border-top: 1px solid var(--color-rule);
    padding-top: 1rem;
}
.training-card h3 {
    font-size: 1.05rem;
    margin: 0.9rem 0 0.45rem;
}
.training-card p {
    font-size: 0.94rem;
    line-height: 1.58;
    margin-bottom: 0.55rem;
}
.pattern-line {
    color: var(--color-text-muted);
    font-size: 0.88rem !important;
}
.training-split {
    align-items: start;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    margin-top: 1rem;
}
.compact-list li {
    margin-bottom: 0.8rem;
}
.domain-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1.25rem;
}
.domain-card,
.demo-link-card {
    border-top: 1px solid var(--color-rule);
    padding-top: 1rem;
}
.domain-card h2,
.demo-link-card h2,
.demo-link-card h3 {
    border-bottom: 0;
    font-size: 1.08rem;
    margin-bottom: 0.35rem;
    padding-bottom: 0;
}
.domain-card p,
.demo-link-card p {
    color: var(--color-text-muted);
    font-size: 0.94rem;
    line-height: 1.58;
}
.case-library-groups {
    display: grid;
    gap: 2rem;
    grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.6fr);
}
.case-library-group {
    border-top: 1px solid var(--color-rule);
    padding-top: 1rem;
}
.case-library-group > h2 {
    border-bottom: 0;
    margin-bottom: 0.35rem;
    padding-bottom: 0;
}
.case-library-group > p:not(.eyebrow) {
    color: var(--color-text-muted);
    font-size: 0.96rem;
    line-height: 1.6;
    margin-bottom: 0.2rem;
}
.domain-grid-technical {
    grid-template-columns: 1fr;
}
.technical-card {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    padding: 1rem;
}
.demo-link-card a {
    color: var(--color-text);
    text-decoration: none;
}
.demo-link-card a:hover {
    color: var(--color-link);
    text-decoration: underline;
}
.demo-detail-header {
    margin: 1rem 0 2rem;
}
.demo-detail-header h1 {
    font-size: 1.85rem;
    line-height: 1.25;
    margin-bottom: 0.8rem;
    max-width: 46rem;
}
.demo-meta {
    color: var(--color-text-muted);
    font-size: 0.94rem;
    margin-top: 0.5rem;
}
.demo-shot-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 1rem;
}
.demo-shot {
    margin: 0;
}
.demo-shot img {
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    width: 100%;
}
.demo-shot figcaption {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.45;
    margin-top: 0.35rem;
}
.run-box {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    margin: 1rem 0;
    padding: 1rem;
}
.run-box code {
    font-family: var(--font-mono);
    font-size: 0.86rem;
    white-space: pre-wrap;
}
.pattern-table {
    border-collapse: collapse;
    font-size: 0.92rem;
    margin-top: 1rem;
    width: 100%;
}
.pattern-table th,
.pattern-table td {
    border-bottom: 1px solid var(--color-rule);
    padding: 0.55rem 0.45rem;
    text-align: left;
    vertical-align: top;
}
.pattern-table th {
    color: var(--color-text-muted);
    font-weight: 600;
}
.case-blueprint {
    margin: 1.25rem 0 2rem;
}
.case-blueprint img,
.flow-visual img {
    background: #07101e;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    width: 100%;
}
.case-read-map {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 1rem;
    padding: 1rem;
}
.read-step {
    border-left: 3px solid var(--color-link);
    padding-left: 0.75rem;
}
.read-step strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}
.read-step span {
    color: var(--color-text-muted);
    display: block;
    font-size: 0.84rem;
    line-height: 1.45;
}
.flow-steps {
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1rem;
}
.flow-step {
    border-top: 1px solid var(--color-rule);
    padding-top: 0.8rem;
}
.flow-step .step-num {
    color: var(--color-link);
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}
.flow-step h3 {
    font-size: 1rem;
    line-height: 1.25;
    margin-bottom: 0.35rem;
}
.flow-step p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.4rem;
}
.pattern-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 0.75rem;
}
.pattern-chip {
    background: var(--color-badge-bg);
    border: 1px solid var(--color-rule);
    border-radius: 999px;
    color: var(--color-link);
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1;
    padding: 0.35rem 0.55rem;
}
.insight-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1rem;
}
.insight-card {
    border-top: 1px solid var(--color-rule);
    padding-top: 0.85rem;
}
.insight-card h3 {
    font-size: 1rem;
    margin-bottom: 0.35rem;
}
.insight-card p {
    color: var(--color-text-muted);
    font-size: 0.91rem;
    line-height: 1.52;
}
.artifact-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 1rem;
}
.artifact-card {
    background: #fff;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    padding: 1rem;
}
.artifact-card strong {
    display: block;
    margin-bottom: 0.35rem;
}
.artifact-card code {
    color: var(--color-text-muted);
    font-size: 0.82rem;
    white-space: normal;
}
.live-demo {
    background: #07101e;
    border: 1px solid #33516f;
    border-radius: 6px;
    color: #f3f8ff;
    padding: 1.2rem;
}
.live-demo .section-heading {
    align-items: start;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 0.8rem;
}
.live-demo h2,
.live-demo h3 {
    color: #f3f8ff;
}
.live-demo h2 {
    border-bottom: 0;
    margin-bottom: 0;
    padding-bottom: 0;
}
.live-demo .eyebrow {
    color: #21d6ff;
}
.sim-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: flex-end;
}
.sim-controls select,
.sim-controls button {
    background: #050b14;
    border: 1px solid #33516f;
    border-radius: 6px;
    color: #f3f8ff;
    font: inherit;
    font-size: 0.84rem;
    min-height: 2.2rem;
    padding: 0.4rem 0.6rem;
}
.sim-controls button {
    cursor: pointer;
    font-weight: 700;
}
.sim-controls button:first-of-type {
    border-color: #3cde97;
    color: #3cde97;
}
.sim-note {
    color: #a8bbd2;
    font-size: 0.92rem;
}
.sim-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    margin-top: 1rem;
}
.sim-grid > * {
    min-width: 0;
}
.interactive-steps {
    display: grid;
    gap: 0.55rem;
}
.interactive-step {
    background: #101f34;
    border: 1px solid #33516f;
    border-radius: 6px;
    color: #f3f8ff;
    cursor: pointer;
    display: grid;
    gap: 0.2rem;
    grid-template-columns: 2.2rem minmax(0, 1fr) minmax(5rem, auto);
    padding: 0.7rem;
    text-align: left;
    width: 100%;
}
.interactive-step.done {
    border-color: #3cde97;
}
.interactive-step.active {
    border-color: #ffdd5a;
    box-shadow: 0 0 0 2px rgba(255, 221, 90, 0.16);
}
.interactive-step .idx {
    color: #ffa940;
    font-family: var(--font-mono);
    font-weight: 800;
}
.interactive-step .name {
    font-weight: 800;
    min-width: 0;
}
.interactive-step .pattern {
    color: #21d6ff;
    font-size: 0.75rem;
    justify-self: end;
    max-width: 100%;
    overflow-wrap: anywhere;
    text-align: right;
}
.interactive-step .mini {
    color: #a8bbd2;
    font-size: 0.78rem;
    grid-column: 2 / 4;
    min-width: 0;
}
.state-view,
.terminal-log,
.output-view {
    background: #050b14;
    border: 1px solid #33516f;
    border-radius: 6px;
    min-height: 15rem;
    padding: 0.85rem;
}
.state-view {
    color: #3cde97;
    font-size: 0.76rem;
    overflow: auto;
}
.terminal-log {
    color: #a8bbd2;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    overflow: auto;
}
.terminal-log div {
    margin-bottom: 0.45rem;
}
.terminal-log .active-line {
    color: #ffdd5a;
}
.output-view {
    display: grid;
    gap: 0.65rem;
}
.output-headline {
    color: #f3f8ff;
    font-size: 1rem;
    font-weight: 800;
}
.verdict {
    border: 1px solid #3cde97;
    border-radius: 999px;
    color: #3cde97;
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 0.2rem 0.55rem;
    width: max-content;
}
.verdict.warn {
    border-color: #ffdd5a;
    color: #ffdd5a;
}
.output-cards {
    display: grid;
    gap: 0.55rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.output-card {
    background: #172b46;
    border: 1px solid #33516f;
    border-radius: 6px;
    padding: 0.65rem;
}
.output-card strong {
    color: #a8bbd2;
    display: block;
    font-size: 0.72rem;
    margin-bottom: 0.15rem;
}
.output-card span {
    color: #f3f8ff;
    font-weight: 700;
}

@media (max-width: 600px) {
    .training-hero h1 { font-size: 1.65rem; }
    .training-grid,
    .training-split,
    .domain-grid,
    .case-library-groups,
    .demo-shot-grid,
    .case-read-map,
    .flow-steps,
    .insight-grid,
    .artifact-grid,
    .sim-grid,
    .output-cards { grid-template-columns: 1fr; }
    .live-demo .section-heading { flex-direction: column; }
    .sim-controls { justify-content: stretch; }
    .sim-controls select,
    .sim-controls button { flex: 1 1 auto; }
    .interactive-step { grid-template-columns: 2rem minmax(0, 1fr); }
    .interactive-step .pattern {
        grid-column: 2;
        justify-self: start;
        text-align: left;
    }
    .interactive-step .mini { grid-column: 2; }
}

/* --- writing index page --- */
.writing-index {
    max-width: var(--measure);
    margin: 0 auto;
}
.writing-index h1 {
    font-size: 1.7rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.015em;
}
.writing-index .lede { margin-bottom: 2rem; }

.writing-list li {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-rule);
}
.writing-list li:last-child { border-bottom: 0; }
.writing-list .post-date { display: block; margin-bottom: 0.2rem; }
.writing-list a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.05rem;
}
.writing-list a:hover { color: var(--color-link); text-decoration: underline; }
.writing-list .post-blurb {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-top: 0.35rem;
    line-height: 1.55;
}

/* --- writing article page --- */
article.essay {
    max-width: var(--measure);
    margin: 0 auto;
}
article.essay header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-rule);
}
article.essay h1 {
    font-size: 1.85rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.6rem;
    letter-spacing: -0.015em;
}
article.essay .essay-meta {
    color: var(--color-text-faint);
    font-size: 0.9rem;
}
article.essay .essay-meta a { color: var(--color-text-muted); }

article.essay h2 {
    font-size: 1.32rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    line-height: 1.3;
    font-family: var(--font-sans);
}
article.essay h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    font-family: var(--font-sans);
}
article.essay p {
    margin-bottom: 1.1rem;
    font-family: var(--font-serif);
    font-size: 1.075rem;
    line-height: 1.72;
}
article.essay ul,
article.essay ol {
    margin: 0 0 1.1rem 1.5rem;
    list-style: disc;
    font-family: var(--font-serif);
    font-size: 1.075rem;
    line-height: 1.7;
}
article.essay ol { list-style: decimal; }
article.essay li { margin-bottom: 0.4rem; }
article.essay strong { font-weight: 600; }
article.essay em { font-style: italic; }
article.essay blockquote {
    margin: 1.5rem 0;
    padding: 0.5rem 1.25rem;
    border-left: 3px solid var(--color-link);
    color: var(--color-text-muted);
    font-style: italic;
    font-family: var(--font-serif);
}
article.essay code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--color-quote-bg);
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
}
article.essay pre {
    background: var(--color-quote-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1.25rem 0;
}
article.essay pre code {
    background: transparent;
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.5;
}
/* Markdown-rendered tables inside essays (pattern white papers). Scoped so
   existing pages are untouched. */
article.essay table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.55;
}
article.essay thead th {
    background: var(--color-quote-bg);
    border-bottom: 2px solid var(--color-rule);
    font-weight: 600;
}
article.essay th,
article.essay td {
    border: 1px solid var(--color-rule);
    padding: 0.5rem 0.75rem;
    text-align: left;
    vertical-align: top;
}
article.essay hr {
    border: 0;
    text-align: center;
    margin: 2.5rem 0;
    height: 0;
}
article.essay hr::after {
    content: "* * *";
    color: var(--color-text-faint);
    letter-spacing: 0.5em;
}

article.essay footer {
    margin-top: 3rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-rule);
    color: var(--color-text-muted);
    font-size: 0.95rem;
}
article.essay footer a { color: var(--color-link); }

/* --- about & books pages --- */
.about-content,
.books-content {
    max-width: 52rem;
    margin: 0 auto;
}
.about-content h1,
.books-content h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    letter-spacing: -0.015em;
}
.about-content p,
.books-content p {
    margin-bottom: 1.1rem;
    font-family: var(--font-serif);
    font-size: 1.075rem;
    line-height: 1.7;
}
.about-content h2,
.books-content h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    font-family: var(--font-sans);
    border-bottom: 1px solid var(--color-rule);
    padding-bottom: 0.4rem;
}
.about-content h3,
.books-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    font-family: var(--font-sans);
}
.book-entry {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-rule);
}
.book-entry:last-child { border-bottom: 0; }
.book-entry h3 { margin-top: 0; }
.book-entry .book-meta {
    color: var(--color-text-faint);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* --- footer --- */
.site-footer {
    border-top: 1px solid var(--color-rule);
    padding: 1.5rem 0;
    color: var(--color-text-faint);
    font-size: 0.9rem;
    margin-top: 4rem;
}
.site-footer a { color: var(--color-text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--color-link); text-decoration: underline; }

/* --- ======================================================================
   ZH SECTION (preserves card-grid Chinese homepage layout from V1)
   ====================================================================== */

.navbar {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,0.95);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--color-rule);
    padding: 0.65rem 0;
}
.nav-container {
    max-width: var(--container); margin: 0 auto; padding: 0 1.25rem;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
    font-weight: 700; color: var(--color-text); text-decoration: none;
    font-size: 1.05rem;
}
.nav-toggle {
    display: none;
    background: none; border: 0; cursor: pointer;
    flex-direction: column; gap: 4px;
}
.nav-toggle span {
    display: block; width: 24px; height: 2px; background: var(--color-text);
}
.nav-menu {
    display: flex; gap: 1.25rem; list-style: none;
}
.nav-menu a {
    color: var(--color-text-muted); text-decoration: none; font-size: 0.95rem;
}
.nav-menu a:hover { color: var(--color-link); }
.nav-lang {
    border-left: 1px solid var(--color-rule); padding-left: 1.25rem;
}

.hero {
    background: #1a1a2e; color: #f0f0f0;
    padding: 3rem 0 3.5rem;
}
.hero-content {
    display: grid; grid-template-columns: 96px 1fr; gap: 1.5rem;
    align-items: center; max-width: var(--container); margin: 0 auto;
    padding: 0 1.25rem;
}
@media (max-width: 600px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-avatar { margin: 0 auto; }
}
.hero-avatar { width: 96px; height: 96px; border-radius: 50%; overflow: hidden; background: #333; }
.avatar-img { width: 100%; height: 100%; object-fit: cover; }
.hero-name { font-size: 1.8rem; font-weight: 700; margin-bottom: 0.25rem; }
.hero-subtitle { color: #c8702a; font-size: 1.05rem; margin-bottom: 0.5rem; }
.hero-tagline { color: rgba(255,255,255,0.85); margin-bottom: 0.75rem; }
.hero-intro { color: rgba(255,255,255,0.7); font-size: 0.95rem; line-height: 1.6; max-width: 36rem; }
.hero-links { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.hero-link {
    display: inline-flex; align-items: center; gap: 0.4rem;
    color: rgba(255,255,255,0.85); text-decoration: none;
    border: 1px solid rgba(255,255,255,0.25); padding: 0.4rem 0.85rem;
    border-radius: 4px; font-size: 0.92rem;
}
.hero-link:hover { background: rgba(255,255,255,0.08); color: #fff; }

.section { padding: 3rem 0; border-bottom: 1px solid var(--color-rule); }
.section:last-of-type { border-bottom: 0; }
.section-header {
    margin-bottom: 1.5rem;
    max-width: var(--container); margin-left: auto; margin-right: auto;
    padding: 0 1.25rem;
}
.section-title { font-size: 1.4rem; font-weight: 600; margin-bottom: 0.4rem; }
.section-subtitle { color: var(--color-text-muted); font-size: 0.98rem; }
.section-stat { color: var(--color-text-muted); font-size: 0.95rem; margin-top: 0.4rem; }

.card-grid {
    max-width: var(--container); margin: 0 auto; padding: 0 1.25rem;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}
.card {
    background: #fff; border: 1px solid var(--color-rule); border-radius: 6px;
    padding: 1.1rem; transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover { border-color: var(--color-link); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.book-cover {
    background: linear-gradient(135deg, #faf4eb, #f0e4d0);
    height: 220px; border-radius: 4px; margin-bottom: 0.85rem;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden; padding: 0.5rem;
}
.book-cover img {
    max-height: 100%; max-width: 100%; width: auto; height: auto;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(60, 30, 10, 0.18));
}
.book-cover img.flat-cover {
    /* Flat 2D scans (e.g. SAP 2005) — fake a subtle 3D tilt */
    box-shadow: 4px 5px 10px rgba(60, 30, 10, 0.22);
    transform: perspective(500px) rotateY(-7deg);
    filter: none;
}

/* --- Manning-style mock cover (CSS-only, NOT using Manning's exact engraving or MEAP stamp) --- */
.book-cover-mock {
    position: relative;
    padding: 0;
    display: block;
    background: #f4ecde;
    overflow: hidden;
    box-shadow: 4px 5px 10px rgba(60, 30, 10, 0.22);
    transform: perspective(500px) rotateY(-7deg);
}
.book-cover-mock .mock-dark-strip {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 38%;
    background: #423f3b;
}
.book-cover-mock .mock-content {
    position: absolute; inset: 0; z-index: 1;
}
.mock-title-block {
    /* Constrain title block to the dark strip + a little cream overlap.
       Stops "Designing AI Agents" from sprawling across the cream area,
       so visually the title sits next to the figure rather than reaching it. */
    position: absolute;
    left: 12px; top: 14px;
    width: 52%;
}
.mock-title {
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 700;
    font-size: 1.45rem;
    color: #c96838;
    line-height: 0.96;
    letter-spacing: -0.01em;
    margin: 0 0 0.35rem 0;
}
.mock-subtitle {
    color: #f5f1e6;
    font-style: italic;
    font-size: 0.55rem;
    line-height: 1.35;
    margin: 0;
    max-width: 28%;
}
.mock-author {
    position: absolute;
    left: 12px; top: 122px;
    color: #ddd;
    font-style: italic;
    font-size: 0.72rem;
    margin: 0;
}
.mock-figure-area {
    /* Anchor figure left-of-center (left:42%, width:30%) so it crosses just past
       the dark strip and the cream right-edge becomes the whitespace zone. */
    position: absolute;
    left: 42%; top: 20px;
    width: 30%; height: 180px;
}
.mock-figure-img {
    width: 100%; height: 100%;
    object-fit: contain;
}
.mock-figure-svg {
    width: 100%; height: 100%;
    fill: #6a5638;
    opacity: 0.88;
}
.mock-publisher-line {
    position: absolute;
    left: 12px; bottom: 8px;
    display: flex; align-items: center; gap: 5px;
}
.mock-manning-bars {
    display: inline-flex; flex-direction: column; gap: 2px;
}
.mock-manning-bars span {
    display: block; width: 12px; height: 2px;
    background: #fff;
}
.mock-manning-label {
    font-family: Arial, "Helvetica Neue", sans-serif;
    font-weight: 700;
    letter-spacing: 0.1em;
    font-size: 0.5rem;
    color: #fff;
}
.book-cover-placeholder { color: #a85a1e; font-weight: 600; }
.book-year { font-weight: 700; color: #a85a1e; font-size: 1.2rem; }
.card-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem; line-height: 1.35; }
.card-desc { color: var(--color-text-muted); font-size: 0.92rem; line-height: 1.55; margin-bottom: 0.6rem; }
.card-meta { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin-bottom: 0.5rem; }
.meta-publisher { color: var(--color-text-faint); font-size: 0.85rem; }
.badge-new { background: #d4442a; color: #fff; }
.badge-rating { background: var(--color-badge-bg); color: var(--color-badge); }
.badge-high { background: #2d8a4e; color: #fff; }
.badge-free { background: #2d8a4e; color: #fff; }

.btn {
    display: inline-block; padding: 0.35rem 0.9rem; border-radius: 4px;
    font-size: 0.88rem; text-decoration: none;
    background: var(--color-quote-bg); color: var(--color-link);
    border: 1px solid var(--color-rule);
}
.btn:hover { background: var(--color-badge-bg); }
.btn-sm { padding: 0.25rem 0.75rem; font-size: 0.82rem; }
.btn-primary { background: var(--color-link); color: #fff; border-color: var(--color-link); }
.btn-primary:hover { background: var(--color-link-hover); color: #fff; }

.course-list {
    max-width: var(--container); margin: 0 auto; padding: 0 1.25rem;
    display: grid; gap: 0.75rem;
}
.course-card {
    display: grid; grid-template-columns: 48px 1fr auto; gap: 1rem;
    align-items: center; text-decoration: none; color: inherit;
}
.course-icon { color: var(--color-link); }
.course-arrow { color: var(--color-text-faint); font-size: 1.4rem; }

.wechat-content,
.planet-content {
    max-width: var(--container); margin: 0 auto; padding: 0 1.25rem;
    display: grid; grid-template-columns: 200px 1fr; gap: 3rem; align-items: start;
}
.wechat-info h3, .planet-info h3 { margin-top: 0; }
@media (max-width: 600px) {
    .wechat-content, .planet-content { grid-template-columns: 1fr; gap: 1.5rem; }
}
.qr-placeholder {
    width: 200px; height: 200px; background: var(--color-quote-bg);
    border-radius: 6px; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 0.5rem;
    color: var(--color-text-muted);
}
.qr-image {
    width: 200px; height: 200px; object-fit: contain;
    border-radius: 6px; background: #fff;
    border: 1px solid var(--color-rule);
    padding: 6px;
}

/* --- Course group sub-headers --- */
.course-group-title {
    max-width: var(--container); margin: 1.75rem auto 0.75rem;
    padding: 0 1.25rem;
    font-size: 1.05rem; font-weight: 600;
    color: var(--color-link);
    border-left: 3px solid var(--color-link);
    padding-left: 0.85rem;
}
.course-group-title:first-of-type { margin-top: 0; }

/* --- Knowledge Planet 5-series grid (A-E) --- */
.planet-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.planet-card {
    display: block; text-decoration: none; color: inherit;
    position: relative; padding-top: 1.4rem;
}
.planet-card-tag {
    position: absolute; top: -10px; left: 14px;
    width: 32px; height: 32px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem; color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.12);
}
.planet-card-a .planet-card-tag { background: #b87333; }   /* warm copper (思考复盘) */
.planet-card-b .planet-card-tag { background: #2b4a6f; }   /* deep blue (Agent 工程手札) */
.planet-card-c .planet-card-tag { background: #6a4c93; }   /* purple (模式图鉴) */
.planet-card-d .planet-card-tag { background: #2d2d2d; }   /* near-black (框架点评) */
.planet-card-e .planet-card-tag { background: #8a6342; }   /* sepia (造物者日志) */
.planet-card-hashtag {
    display: inline-block; margin-top: 0.4rem;
    color: var(--color-text-faint); font-size: 0.82rem;
    font-family: var(--font-mono, ui-monospace, SFMono-Regular, monospace);
}
.planet-cta-wrap {
    max-width: var(--container); margin: 1.5rem auto 0;
    padding: 0 1.25rem; text-align: center;
}

/* --- Interviews teaser on homepage --- */
.interview-feature {
    max-width: var(--container); margin: 0 auto;
    padding: 1.2rem 1.4rem;
    display: grid; grid-template-columns: 1fr auto;
    align-items: center; gap: 1rem;
    text-decoration: none; color: inherit;
}
.interview-source {
    display: inline-block; margin-bottom: 0.35rem;
    color: var(--color-link); font-size: 0.82rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.02em;
}
.interviews-more {
    max-width: var(--container); margin: 1rem auto 0;
    padding: 0 1.25rem; text-align: center;
}

/* --- /zh/interviews/ page --- */
.page-header {
    max-width: var(--container); margin: 0 auto;
    padding: 3rem 1.25rem 1rem;
}
.page-title {
    font-size: 1.9rem; font-weight: 700; margin-bottom: 0.4rem;
    color: var(--color-text);
}
.page-subtitle {
    color: var(--color-text-muted); font-size: 1rem; line-height: 1.55;
    max-width: 42rem;
}
.nav-link-active { color: var(--color-link) !important; font-weight: 600; }

.interview-list {
    max-width: var(--container); margin: 0 auto;
    padding: 0 1.25rem;
    list-style: none;
}
.interview-item {
    border-bottom: 1px solid var(--color-rule);
    padding: 1.2rem 0;
}
.interview-item:first-child { padding-top: 0.5rem; }
.interview-item:last-child { border-bottom: 0; }
.interview-item a {
    text-decoration: none; color: inherit;
    display: block;
}
.interview-item a:hover .interview-title { color: var(--color-link); }
.interview-meta {
    display: flex; gap: 0.85rem; align-items: center;
    margin-bottom: 0.4rem; flex-wrap: wrap;
}
.interview-date {
    color: var(--color-text-faint); font-size: 0.85rem;
}
.interview-title {
    font-size: 1.15rem; font-weight: 600;
    line-height: 1.45; margin-bottom: 0.4rem;
    color: var(--color-text);
    transition: color 0.15s;
}
.interview-blurb {
    color: var(--color-text-muted); font-size: 0.95rem;
    line-height: 1.6;
}

.video-stub {
    max-width: var(--container); margin: 0 auto;
    padding: 1.5rem 1.4rem;
    background: var(--color-quote-bg);
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    color: var(--color-text-muted);
}
.video-stub p { line-height: 1.65; margin-bottom: 0.7rem; }
.video-stub strong { color: var(--color-text); }
.video-stub-note {
    font-size: 0.9rem; color: var(--color-text-faint);
    border-left: 2px solid var(--color-rule);
    padding-left: 0.8rem; margin-top: 0.4rem;
}
.interview-list-video { margin-top: 1.2rem; padding: 0; }
.interview-item-stub {
    display: flex; gap: 0.85rem; align-items: center;
    color: var(--color-text-muted); font-size: 0.92rem;
    padding: 0.6rem 0;
}
.interview-stub-text { line-height: 1.5; }
.wechat-info ul, .planet-info ul {
    list-style: disc; margin: 0.75rem 0 1rem 1.25rem;
    color: var(--color-text-muted); font-size: 0.95rem;
}
.wechat-info li, .planet-info li { margin-bottom: 0.25rem; }
.wechat-cta { margin-top: 0.75rem; color: var(--color-text); }

.footer {
    background: #1a1a2e; color: rgba(255,255,255,0.6);
    padding: 2rem 0; margin-top: 3rem; text-align: center;
}
.footer-brand { color: #f0f0f0; font-weight: 600; margin-bottom: 0.5rem; }
.footer-links { display: flex; justify-content: center; gap: 1.25rem; margin-bottom: 0.5rem; flex-wrap: wrap; }
.footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.9rem; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: 0.85rem; color: rgba(255,255,255,0.4); }

@media (max-width: 600px) {
    .nav-menu.no-mobile { display: none; }
    .nav-toggle { display: flex; }
}

/* ========================================================================
   Pattern Ancestors · hover research page
   ======================================================================== */

.ancestor-hero {
    margin-bottom: 2rem;
}
.page-pattern-ancestors .container {
    max-width: 72rem;
}
.page-pattern-ancestors article.essay,
.page-pattern-ancestors .block {
    max-width: 72rem;
}
.ancestor-hero h1 {
    max-width: 52rem;
}
.ancestor-layout {
    align-items: start;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(0, 1.15fr) minmax(20rem, 0.85fr);
    margin: 1.5rem 0 2rem;
}
.ancestor-layout.ancestor-panel-closed {
    grid-template-columns: 1fr;
}
.ancestor-layout.ancestor-panel-closed .ancestor-detail-panel,
.ancestor-detail-panel[hidden] {
    display: none;
}
.ancestor-panel-show {
    margin-top: 0.2rem;
}
.pattern-ancestor-grid {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.ancestor-pattern-card {
    background: #fff;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    color: var(--color-text);
    cursor: pointer;
    display: block;
    font: inherit;
    min-height: 6.2rem;
    padding: 0.85rem;
    text-align: left;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
    width: 100%;
}
.ancestor-pattern-card:hover,
.ancestor-pattern-card:focus,
.ancestor-pattern-card.active {
    border-color: var(--color-link);
    box-shadow: 0 8px 20px rgba(56, 104, 91, 0.12);
    outline: none;
    transform: translateY(-1px);
}
.ancestor-pattern-card .pattern-name {
    display: block;
    font-weight: 700;
    line-height: 1.25;
}
.ancestor-pattern-card .pattern-meta {
    color: var(--color-text-muted);
    display: block;
    font-size: 0.78rem;
    margin-top: 0.35rem;
}
.ancestor-pattern-card .pattern-ancestor {
    color: var(--color-text-faint);
    display: block;
    font-size: 0.78rem;
    line-height: 1.35;
    margin-top: 0.45rem;
}
.ancestor-detail-panel {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    padding: 1.2rem;
    position: sticky;
    top: 6rem;
}
.ancestor-detail-panel h2 {
    border-bottom: 0;
    margin-bottom: 0.35rem;
    padding-bottom: 0;
}
.ancestor-detail-panel h3 {
    font-size: 0.92rem;
    margin: 1rem 0 0.35rem;
}
.ancestor-detail-panel p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.62;
}
.ancestor-tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin: 0.75rem 0 0.2rem;
}
.ancestor-tag {
    background: #fff;
    border: 1px solid var(--color-rule);
    border-radius: 999px;
    color: var(--color-text-muted);
    font-size: 0.76rem;
    padding: 0.2rem 0.5rem;
}
.ancestor-more {
    margin-top: 1rem;
}
.ancestor-catalog-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1rem;
}
.ancestor-catalog-card {
    border-top: 1px solid var(--color-rule);
    padding-top: 1rem;
}
.ancestor-catalog-card h3 {
    font-size: 1rem;
    margin-bottom: 0.35rem;
}
.ancestor-catalog-card p {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
}
.lineage-table-wrap {
    margin-top: 1rem;
    overflow-x: auto;
}
.lineage-table {
    border-collapse: collapse;
    min-width: 980px;
    table-layout: fixed;
    width: 100%;
}
.lineage-table th:nth-child(1) { width: 18%; }
.lineage-table th:nth-child(2) { width: 16%; }
.lineage-table th:nth-child(3) { width: 31%; }
.lineage-table th:nth-child(4) { width: 35%; }
.lineage-table th,
.lineage-table td {
    border-top: 1px solid var(--color-rule);
    font-size: 0.88rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
    padding: 0.65rem 0.7rem;
    text-align: left;
    vertical-align: top;
}
.lineage-table th {
    background: #f0f6f4;
    color: var(--color-text);
    font-weight: 700;
}
.lineage-table td {
    color: var(--color-text-muted);
}
.lineage-table td:first-child {
    color: var(--color-text);
    font-weight: 700;
}
.lineage-table .position {
    color: var(--color-text-faint);
    white-space: nowrap;
}
.source-grid {
    columns: 2 18rem;
    margin-top: 1rem;
}
.source-grid li {
    break-inside: avoid;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 0.6rem;
}
.matrix-figure {
    margin: 2rem 0 1.5rem;
    text-align: center;
}
.matrix-figure img {
    border: 1px solid var(--color-rule);
    border-radius: 4px;
    height: auto;
    max-width: 100%;
}
.matrix-figure figcaption {
    color: var(--color-text-muted);
    font-size: 0.86rem;
    margin-top: 0.7rem;
}
.matrix-reference-layout {
    align-items: start;
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.45fr);
    margin: 1.5rem 0;
}
.matrix-reference-layout.matrix-panel-closed {
    grid-template-columns: 1fr;
}
.matrix-reference-layout.matrix-panel-closed .matrix-hover-panel {
    display: none;
}
.matrix-hover-panel[hidden] {
    display: none;
}
.matrix-scroll {
    overflow-x: auto;
}
.matrix-hover-panel {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    padding: 1rem;
    position: sticky;
    top: 6rem;
}
.matrix-hover-panel h3 {
    font-size: 1.05rem;
    line-height: 1.25;
    margin: 0.2rem 0 0.55rem;
}
.matrix-hover-panel p,
.matrix-hover-panel dd {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}
.matrix-hover-panel dl {
    margin: 0.8rem 0 0;
}
.matrix-hover-panel dt {
    color: var(--color-text);
    font-size: 0.78rem;
    font-weight: 700;
    margin-top: 0.7rem;
    text-transform: uppercase;
}
.matrix-hover-panel dd {
    margin: 0.2rem 0 0;
}
.matrix-hover-panel .ancestor-more {
    font-size: 0.88rem;
}
.matrix-panel-close {
    background: #fff;
    border: 1px solid var(--color-rule);
    border-radius: 999px;
    color: var(--color-text-muted);
    cursor: pointer;
    float: right;
    font: inherit;
    font-size: 0.8rem;
    line-height: 1;
    padding: 0.25rem 0.5rem;
}
.matrix-panel-close:hover,
.matrix-panel-show:hover {
    border-color: var(--color-link);
    color: var(--color-link);
}
.matrix-panel-show {
    background: #f0f6f4;
    border: 1px solid var(--color-rule);
    border-radius: 999px;
    color: var(--color-text-muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
    margin: 0.5rem 0 0;
    padding: 0.35rem 0.75rem;
}
.matrix-panel-show[hidden] {
    display: none;
}

@media (max-width: 760px) {
    .ancestor-layout,
    .ancestor-catalog-grid,
    .matrix-reference-layout {
        grid-template-columns: 1fr;
    }
    .pattern-ancestor-grid {
        grid-template-columns: 1fr;
    }
    .ancestor-detail-panel {
        position: static;
    }
}

/* ========================================================================
   Dual-Axis Framework · Interactive Matrix + Pattern Pages
   Added 2026-05-14
   ======================================================================== */

/* Interactive matrix — replaces static .matrix-table */
.matrix-interactive {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}
.matrix-interactive th,
.matrix-interactive td {
    border: 1px solid #d4c4b0;
    padding: 0;
    vertical-align: top;
    text-align: left;
    background: #fff;
}
.matrix-interactive th {
    background: #f5e6d3;
    font-weight: 600;
    font-size: 0.85rem;
}
.matrix-interactive thead th { text-align: center; }
.matrix-interactive .corner-cell {
    background: #ead4b8;
    font-size: 0.75rem;
    line-height: 1.3;
    color: #6a4a1e;
    padding: 0.55rem 0.65rem;
}
.matrix-interactive .row-header,
.matrix-interactive .col-header {
    transition: background 0.15s ease;
}
.matrix-interactive .row-header a,
.matrix-interactive .col-header a {
    display: block;
    padding: 0.6rem 0.7rem;
    color: #6a4a1e;
    text-decoration: none;
    border-bottom: 2px solid transparent;
}
.matrix-interactive .row-header a:hover,
.matrix-interactive .col-header a:hover {
    background: #ead4b8;
    color: var(--color-link);
    border-bottom-color: var(--color-link);
}
.matrix-interactive .pattern-cell a {
    display: block;
    padding: 0.55rem 0.65rem;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.88rem;
    transition: background 0.15s ease, color 0.15s ease;
    border-left: 3px solid transparent;
}
.matrix-interactive .pattern-cell a:hover {
    background: #faf4ec;
    color: var(--color-link);
    border-left-color: var(--color-link);
}
.matrix-interactive .pattern-cell .pattern-name {
    font-weight: 500;
}
.matrix-interactive .pattern-cell .pattern-hint {
    display: block;
    font-size: 0.72rem;
    color: var(--color-text-faint);
    margin-top: 0.15rem;
    line-height: 1.3;
}
.matrix-interactive td.empty {
    color: #b8a68a;
    text-align: center;
    padding: 0.55rem 0.65rem;
    background: #fafaf7;
}
.matrix-interactive td.has-page a {
    font-weight: 600;
}
.matrix-interactive td.has-page a::after {
    content: " →";
    color: var(--color-link);
    opacity: 0.6;
}

/* Coordinate badge — used on pattern + aggregation pages */
.coord-badge {
    display: inline-block;
    background: #faf4ec;
    border: 1px solid #d4c4b0;
    border-radius: 4px;
    padding: 0.35rem 0.7rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #6a4a1e;
    margin: 0.5rem 0 1rem;
}
.coord-badge strong {
    color: var(--color-link);
}

/* Pattern page sections */
.pattern-section {
    margin: 2rem 0;
    padding-top: 1rem;
}
.pattern-section h2 {
    color: #6a4a1e;
    margin-bottom: 0.75rem;
    font-size: 1.35rem;
}
.pattern-section .section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-faint);
    margin-bottom: 0.25rem;
}

/* Mini-matrix highlight (shows pattern position) */
.mini-matrix {
    display: grid;
    grid-template-columns: 1.2fr repeat(6, 1fr);
    gap: 2px;
    margin: 1rem 0;
    font-size: 0.7rem;
    max-width: 36rem;
}
.mini-matrix .mm-cell {
    background: #f5e6d3;
    padding: 0.3rem 0.4rem;
    text-align: center;
    line-height: 1.2;
    color: #6a4a1e;
}
.mini-matrix .mm-row-head {
    background: #ead4b8;
    text-align: left;
    font-weight: 600;
}
.mini-matrix .mm-col-head {
    background: #ead4b8;
    font-weight: 600;
}
.mini-matrix .mm-empty { background: #fafaf7; color: #b8a68a; }
.mini-matrix .mm-active {
    background: var(--color-link);
    color: #fff;
    font-weight: 600;
}
.mini-matrix .mm-row-active,
.mini-matrix .mm-col-active {
    background: #c8702a;
    color: #fff;
}

/* Resource list (engineering blog + papers) */
.resource-list {
    list-style: none;
    margin: 1rem 0;
}
.resource-list li {
    border-left: 3px solid #d4c4b0;
    padding: 0.6rem 0 0.6rem 1rem;
    margin: 0.5rem 0;
    background: #faf4ec;
}
.resource-list li:hover {
    border-left-color: var(--color-link);
    background: #f5ebe0;
}
.resource-list .res-title {
    display: block;
    font-weight: 500;
    color: var(--color-text);
}
.resource-list .res-title a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid #d4c4b0;
}
.resource-list .res-title a:hover {
    color: var(--color-link);
    border-bottom-color: var(--color-link);
}
.resource-list .res-meta {
    display: block;
    font-size: 0.78rem;
    color: var(--color-text-faint);
    margin-top: 0.2rem;
    font-family: var(--font-mono);
}
.resource-list .res-blurb {
    display: block;
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin-top: 0.3rem;
    line-height: 1.5;
}

/* Related patterns navigation */
.related-patterns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
    margin: 1.5rem 0;
}
.related-patterns a {
    border: 1px solid #d4c4b0;
    border-radius: 4px;
    padding: 0.7rem 0.9rem;
    background: #fff;
    text-decoration: none;
    color: var(--color-text);
    transition: border-color 0.15s ease, background 0.15s ease;
}
.related-patterns a:hover {
    border-color: var(--color-link);
    background: #faf4ec;
}
.related-patterns .rp-coord {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-faint);
    margin-bottom: 0.2rem;
}
.related-patterns .rp-name {
    display: block;
    font-weight: 500;
    color: var(--color-link);
}

/* Why three layers preamble box (matrix page) */
.three-layers-box {
    background: #faf4ec;
    border: 1px solid #d4c4b0;
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0 2rem;
}
.three-layers-box h3 {
    margin-top: 0;
    color: #6a4a1e;
    font-size: 1.05rem;
}
.three-layers-box ol {
    list-style: decimal;
    margin: 0.5rem 0 0 1.25rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}
.three-layers-box ol li { margin-bottom: 0.35rem; }

/* Aggregation page · pattern list within a row/column */
.aggregation-patterns {
    margin: 1.5rem 0;
}
.aggregation-patterns .agg-pattern {
    border-left: 3px solid var(--color-link);
    padding: 1rem 0 1rem 1.25rem;
    margin: 1.25rem 0;
}
.aggregation-patterns .agg-pattern h3 {
    margin: 0 0 0.3rem 0;
    font-size: 1.1rem;
}
.aggregation-patterns .agg-pattern h3 a {
    color: var(--color-link);
    text-decoration: none;
    border-bottom: 1px dashed transparent;
}
.aggregation-patterns .agg-pattern h3 a:hover {
    border-bottom-color: var(--color-link);
}
.aggregation-patterns .agg-pattern .agg-coord {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-text-faint);
    margin-bottom: 0.5rem;
}
.aggregation-patterns .agg-pattern p {
    margin: 0.5rem 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* 2026 frontier deep reads — pattern page */
.frontier-intro {
    background: linear-gradient(to right, #faf4ec, #fafaf7);
    border-left: 4px solid var(--color-link);
    padding: 0.9rem 1.1rem;
    margin: 0.4rem 0 1.5rem;
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}
.deep-read {
    background: #fff;
    border: 1px solid #e6d8c4;
    border-radius: 4px;
    padding: 1rem 1.2rem 1.1rem;
    margin: 1.3rem 0;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.deep-read:hover {
    border-color: var(--color-link);
    box-shadow: 0 1px 4px rgba(168, 90, 30, 0.08);
}
.deep-read .dr-num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-link);
    background: var(--color-badge-bg);
    padding: 0.1rem 0.5rem;
    border-radius: 3px;
    margin-bottom: 0.4rem;
    letter-spacing: 0.05em;
}
.deep-read h3 {
    font-size: 1.05rem;
    color: var(--color-text);
    margin: 0.1rem 0 0.3rem 0;
    line-height: 1.4;
}
.deep-read h3 a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid #d4c4b0;
}
.deep-read h3 a:hover {
    color: var(--color-link);
    border-bottom-color: var(--color-link);
}
.deep-read .dr-meta {
    font-size: 0.78rem;
    color: var(--color-text-faint);
    font-family: var(--font-mono);
    margin-bottom: 0.7rem;
}
.deep-read .dr-take {
    font-size: 0.93rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin: 0.4rem 0 0.9rem 0;
}
.deep-read .dr-take strong {
    color: var(--color-text);
}
.paper-flow {
    background: #faf4ec;
    border: 1px solid #ece1cf;
    border-radius: 4px;
    padding: 0.9rem 0.6rem 0.5rem;
    margin: 0.8rem 0 0.3rem;
    overflow-x: auto;
}
.paper-flow svg {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
}
.flow-caption {
    font-size: 0.78rem;
    color: var(--color-text-faint);
    font-family: var(--font-mono);
    text-align: center;
    margin-top: 0.4rem;
    padding: 0 0.3rem;
}