:root {
    --jazz-ground: #eee9de;
    --jazz-paper: #fffdf7;
    --jazz-paper-soft: #f8f3e8;
    --jazz-ink: #211e1a;
    --jazz-muted: #6a635a;
    --jazz-navy: #273c4e;
    --jazz-navy-soft: rgba(39, 60, 78, 0.075);
    --jazz-brass: #8a5e22;
    --jazz-brass-soft: rgba(138, 94, 34, 0.085);
    --jazz-rust: #795047;
    --jazz-line: rgba(48, 43, 36, 0.16);
}

html {
    scroll-behavior: smooth;
}

.jazz-page {
    color: var(--jazz-ink);
    background: var(--jazz-ground);
}

.jazz-page .navbar {
    background: rgba(255, 253, 247, 0.94);
    border-bottom: 1px solid var(--jazz-line);
    backdrop-filter: blur(16px);
}

.jazz-page .navbar a,
.jazz-page .nav-brand {
    color: var(--jazz-ink);
}

.skip-link {
    position: fixed;
    z-index: 10000;
    top: 0.7rem;
    left: 0.7rem;
    padding: 0.65rem 0.85rem;
    border-radius: 0.25rem;
    background: var(--jazz-navy);
    color: #fff;
    transform: translateY(-180%);
}

.skip-link:focus {
    transform: translateY(0);
}

.jazz-main {
    min-height: 100vh;
    padding: 7.25rem 0 5rem;
}

.reading-shell {
    display: grid;
    grid-template-columns: 10rem minmax(0, 1fr);
    gap: 2.25rem;
    width: min(calc(100% - 2.5rem), 78rem);
    margin: 0 auto;
}

.article-toc {
    position: sticky;
    top: 6.5rem;
    align-self: start;
    padding-top: 2.85rem;
    color: var(--jazz-muted);
    font-size: 0.82rem;
}

.toc-label {
    margin: 0 0 0.65rem;
    color: var(--jazz-ink);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.article-toc ol,
.mobile-toc ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

.article-toc li {
    border-left: 1px solid var(--jazz-line);
}

.article-toc a {
    display: block;
    padding: 0.45rem 0 0.45rem 0.85rem;
    color: inherit;
    line-height: 1.45;
    text-decoration: none;
}

.article-toc a:hover,
.article-toc a[aria-current="location"] {
    border-left: 2px solid var(--jazz-brass);
    color: var(--jazz-navy);
    font-weight: 700;
    transform: translateX(-1px);
}

.reading-column {
    min-width: 0;
}

.back-link {
    display: inline-flex;
    margin-bottom: 2rem;
    color: var(--jazz-navy);
    font-size: 0.84rem;
    font-weight: 700;
    text-decoration: none;
}

.mobile-toc {
    display: none;
}

.post {
    color: var(--jazz-ink);
    font-size: 1rem;
    line-height: 1.84;
}

.post-header {
    margin-bottom: 2.75rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--jazz-line);
}

.eyebrow,
.section-kicker,
.matrix-label {
    margin: 0 0 0.7rem;
    color: var(--jazz-brass);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.post h1,
.post h2,
.post h3 {
    color: var(--jazz-ink);
    font-family: ui-serif, "Iowan Old Style", "Songti SC", "STSong", serif;
}

.post h1 {
    max-width: 12ch;
    margin: 0;
    font-size: clamp(2.7rem, 7vw, 4.15rem);
    font-weight: 680;
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.title-note {
    margin: 1rem 0 0;
    color: var(--jazz-navy);
    font-family: ui-serif, "Iowan Old Style", "Songti SC", serif;
    font-size: 1.14rem;
    font-weight: 650;
}

.original-title {
    margin: 0.75rem 0 0;
    color: var(--jazz-muted);
    font-size: 0.77rem;
}

.book-page--dek {
    margin-top: 2rem;
}

.dek {
    max-width: 36rem;
    margin: 0;
    color: #3e3a34;
    font-family: ui-serif, "Iowan Old Style", "Songti SC", "STSong", serif;
    font-size: 1.17rem;
    line-height: 1.82;
}

.post-meta {
    margin: 1.1rem 0 0;
    color: var(--jazz-muted);
    font-size: 0.78rem;
}

.signal-chain {
    display: flex;
    flex-wrap: wrap;
    gap: 0.42rem;
    align-items: center;
    margin-top: 1.35rem;
}

.signal-chain span {
    padding: 0.24rem 0.5rem;
    border-bottom: 1px solid rgba(138, 94, 34, 0.4);
    color: var(--jazz-navy);
    font-size: 0.78rem;
    font-weight: 720;
}

.signal-chain i,
.voice-chain i {
    color: var(--jazz-brass);
    font-style: normal;
}

.overview-card {
    margin: 0 0 3rem;
    padding: 1.6rem;
    border: 1px solid var(--jazz-line);
    border-left: 4px solid var(--jazz-brass);
    border-radius: 0.4rem;
    background: var(--jazz-paper-soft);
}

.overview-card h2 {
    margin: 0;
    font-size: 1.55rem;
    line-height: 1.38;
}

.overview-grid > div:last-child p:first-child {
    margin-top: 0;
}

.overview-grid > div:last-child p:last-child {
    margin-bottom: 0;
}

.thesis-grid {
    display: grid;
    gap: 0.8rem;
    margin-top: 1.4rem;
}

.thesis-grid article {
    padding: 1rem;
    border-top: 1px solid var(--jazz-line);
}

.thesis-grid article > span,
.five-grid article > span {
    color: var(--jazz-brass);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.thesis-grid h3,
.five-grid h2 {
    margin: 0.32rem 0 0.4rem;
    font-size: 1.04rem;
}

.thesis-grid p,
.five-grid p {
    margin: 0;
    color: #514b43;
    font-size: 0.88rem;
    line-height: 1.68;
}

.story-chapter {
    margin: 2rem 0;
    overflow: clip;
    border: 1px solid var(--jazz-line);
    border-radius: 0.65rem;
    background: var(--jazz-paper);
    box-shadow: 0 1px 2px rgba(48, 43, 36, 0.035);
}

.story-chapter > summary {
    position: relative;
    display: grid;
    grid-template-columns: 2.25rem minmax(0, 1fr);
    gap: 0 0.85rem;
    min-height: 5rem;
    padding: 1.25rem 3.5rem 1.25rem 1.5rem;
    cursor: pointer;
    list-style: none;
}

.story-chapter > summary::-webkit-details-marker,
.mobile-toc > summary::-webkit-details-marker {
    display: none;
}

.story-chapter > summary::after,
.mobile-toc > summary::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 1.35rem;
    color: var(--jazz-brass);
    font-size: 1.35rem;
    font-weight: 400;
    line-height: 1;
    transform: translateY(-50%);
    transition: transform 160ms ease;
}

.story-chapter[open] > summary::after,
.mobile-toc[open] > summary::after {
    transform: translateY(-50%) rotate(45deg);
}

.story-chapter[open] > summary {
    border-bottom: 1px solid var(--jazz-line);
    background: var(--jazz-brass-soft);
}

.chapter-number {
    grid-row: 1 / span 2;
    color: var(--jazz-brass);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.chapter-title {
    color: var(--jazz-ink);
    font-family: ui-serif, "Iowan Old Style", "Songti SC", "STSong", serif;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.35;
}

.chapter-meta {
    margin-top: 0.18rem;
    color: var(--jazz-muted);
    font-size: 0.8rem;
    line-height: 1.5;
}

.story-chapter > .chapter-body {
    padding: 0.8rem 1.75rem 2.5rem;
}

.chapter-prose {
    width: min(100%, 50rem);
    margin-inline: auto;
}

.chapter-prose > h2 {
    margin: 2.35rem 0 0.85rem;
    font-size: 1.42rem;
    line-height: 1.45;
}

.chapter-prose > h3 {
    margin: 1.5rem 0 0.65rem;
}

.chapter-prose p {
    margin: 0.95rem 0;
}

.chapter-prose ul,
.chapter-prose ol {
    padding-inline-start: 1.35rem;
}

.chapter-prose li {
    margin: 0.48rem 0;
    padding-left: 0.2rem;
}

.chapter-intro {
    margin: 1.25rem 0 2rem !important;
    color: #5a534b;
    font-size: 0.96rem;
}

.pull-quote {
    margin: 2.3rem 0;
    padding: 0.25rem 0 0.25rem 1.35rem;
    border-left: 3px solid var(--jazz-brass);
    color: var(--jazz-navy);
    font-family: ui-serif, "Iowan Old Style", "Songti SC", "STSong", serif;
    font-size: 1.22rem;
    font-weight: 650;
    line-height: 1.72;
}

.book-spread--two,
.goal-matrix,
.method-spread,
.sense-cards,
.practice-pair,
.stage-spread {
    display: grid;
    gap: 0.85rem;
}

.goal-matrix {
    margin: 1.4rem 0 2.5rem;
}

.goal-matrix section,
.method-spread section,
.sense-cards section,
.practice-pair section,
.stage-spread section {
    padding: 1.2rem 1.25rem;
    border: 1px solid var(--jazz-line);
    border-radius: 0.35rem;
    background: #fbf8f0;
}

.goal-matrix h2,
.method-spread h2,
.practice-pair h2,
.stage-spread h2 {
    margin: 0.3rem 0 0.7rem;
    font-size: 1.16rem;
}

.goal-matrix p,
.method-spread p,
.sense-cards p,
.practice-pair p,
.stage-spread p,
.stage-spread li {
    color: #504a43;
    font-size: 0.92rem;
    line-height: 1.75;
}

.five-grid {
    display: grid;
    gap: 0.7rem;
    margin: 1.5rem 0 2.5rem;
}

.five-grid article {
    padding: 1rem;
    border-top: 2px solid rgba(39, 60, 78, 0.28);
    background: var(--jazz-navy-soft);
}

.five-grid .five-grid-emphasis {
    border-color: var(--jazz-brass);
    background: var(--jazz-brass-soft);
}

.flow-line,
.large-line {
    color: var(--jazz-navy) !important;
    font-family: ui-serif, "Iowan Old Style", "Songti SC", "STSong", serif;
    font-weight: 650;
}

.hearing-note,
.source-boundary,
.omitted-source-note {
    margin: 2rem 0;
    padding: 1.15rem 1.25rem;
    border-left: 3px solid var(--jazz-navy);
    border-radius: 0.25rem;
    background: var(--jazz-navy-soft);
    color: #4f4a44;
}

.hearing-note h2 {
    margin: 0.2rem 0 0.65rem;
    font-size: 1.18rem;
}

.source-boundary,
.omitted-source-note {
    color: #5a534b;
    font-size: 0.88rem;
    line-height: 1.72;
}

.source-boundary strong,
.omitted-source-note strong {
    color: var(--jazz-navy);
}

.source-boundary p,
.omitted-source-note p {
    margin: 0.35rem 0 0;
}

.voice-chain {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    justify-content: center;
    margin: 2rem 0 0;
    padding: 1.15rem;
    border-top: 1px solid var(--jazz-line);
    border-bottom: 1px solid var(--jazz-line);
}

.voice-chain span {
    min-width: 7rem;
    color: var(--jazz-navy);
    font-weight: 750;
    text-align: center;
}

.voice-chain small {
    color: var(--jazz-muted);
    font-size: 0.72rem;
    font-weight: 500;
}

.sense-cards {
    margin: 1.4rem 0 2.5rem;
}

.sense-cards section > span {
    color: var(--jazz-brass);
    font-size: 0.72rem;
    font-weight: 800;
}

.sense-cards h3 {
    margin: 0.35rem 0 0.55rem;
    font-size: 1.08rem;
}

.level-card ol {
    margin-bottom: 0;
}

.course-ladder {
    display: grid;
    gap: 0;
    margin: 1.4rem 0 2.7rem;
    border-top: 1px solid var(--jazz-line);
}

.course-ladder section {
    display: grid;
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--jazz-line);
}

.course-ladder span {
    color: var(--jazz-brass);
    font-size: 0.84rem;
    font-weight: 820;
}

.course-ladder p {
    margin: 0;
    color: #504a43;
    font-size: 0.91rem;
    line-height: 1.7;
}

.stage-spread h3 {
    margin: 1.25rem 0 0.45rem;
    color: var(--jazz-navy);
    font-size: 0.95rem;
}

.pull-quote--end {
    margin-bottom: 0;
}

.read-next {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: min(100%, 50rem);
    margin: 3rem auto 0;
    padding: 1rem 1.15rem;
    border: 1px solid rgba(39, 60, 78, 0.25);
    border-radius: 0.35rem;
    background: var(--jazz-navy-soft);
    color: var(--jazz-navy);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    text-align: left;
}

.read-next:hover {
    border-color: var(--jazz-navy);
    background: rgba(39, 60, 78, 0.12);
}

.source-note {
    margin: 3.25rem 0 0;
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--jazz-line);
    border-left: 3px solid var(--jazz-navy);
    border-radius: 0.35rem;
    background: rgba(255, 253, 247, 0.88);
    color: #565049;
    font-size: 0.9rem;
    line-height: 1.76;
}

.source-note h2 {
    margin: 0 0 0.75rem;
    font-size: 1.18rem;
}

.source-note p {
    margin: 0.65rem 0 0;
}

.end-note {
    margin: 2rem 0 0;
    color: var(--jazz-muted);
    font-size: 0.8rem;
    text-align: right;
}

.post :where(a, summary, button):focus-visible {
    border-radius: 0.25rem;
    outline: 3px solid rgba(39, 60, 78, 0.34);
    outline-offset: 4px;
}

.jazz-footer {
    border-top: 1px solid var(--jazz-line);
    background: var(--jazz-paper);
}

@media (min-width: 1280px) {
    .jazz-page {
        background:
            repeating-linear-gradient(180deg, transparent 0 2.5rem, rgba(39, 60, 78, 0.025) 2.5rem calc(2.5rem + 1px)),
            var(--jazz-ground);
    }

    .jazz-main {
        padding: 7.5rem 0 6rem;
    }

    .reading-shell {
        grid-template-columns: 10.75rem minmax(0, 1fr);
        gap: clamp(2.5rem, 3.5vw, 3.75rem);
        width: min(calc(100% - 4rem), 94rem);
    }

    .reading-column {
        padding: 2.25rem clamp(2.75rem, 4vw, 4.25rem) 4rem;
        border: 1px solid rgba(48, 43, 36, 0.13);
        border-radius: 0.15rem;
        background: var(--jazz-paper);
        box-shadow: 0 2.2rem 5rem rgba(48, 43, 36, 0.1);
    }

    .post {
        font-size: 1.075rem;
        line-height: 1.92;
    }

    .book-spread--header {
        position: relative;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: clamp(4rem, 6vw, 6rem);
        align-items: start;
        min-height: 23rem;
        margin: 0 -0.5rem 3.5rem;
        padding: 2.25rem 0.5rem 2.8rem;
    }

    .book-spread--header::after {
        content: "";
        position: absolute;
        top: 2rem;
        bottom: 2.75rem;
        left: 50%;
        width: 1px;
        background: linear-gradient(transparent, rgba(48, 43, 36, 0.22) 12%, rgba(48, 43, 36, 0.22) 88%, transparent);
        box-shadow: 0 0 1.25rem rgba(48, 43, 36, 0.08);
    }

    .book-page--title {
        display: flex;
        flex-direction: column;
        min-height: 17.5rem;
    }

    .post h1 {
        max-width: 10ch;
        font-size: clamp(3rem, 3.6vw, 3.9rem);
    }

    .title-note {
        margin-top: auto;
    }

    .book-page--dek {
        align-self: end;
        margin-top: 0;
        padding-bottom: 0.35rem;
    }

    .overview-card {
        margin-bottom: 3.5rem;
        padding: 2rem 2.25rem;
        border-left-width: 1px;
        border-radius: 0.15rem;
    }

    .overview-grid {
        display: grid;
        grid-template-columns: 0.72fr 1.28fr;
        gap: clamp(3rem, 5vw, 5rem);
    }

    .overview-card h2 {
        font-size: 1.8rem;
    }

    .thesis-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        padding-top: 1.45rem;
        border-top: 1px solid var(--jazz-line);
    }

    .thesis-grid article {
        border-top: 0;
        border-left: 1px solid var(--jazz-line);
    }

    .story-chapter {
        margin: 2.75rem 0;
        border-radius: 0.15rem;
    }

    .story-chapter > summary {
        min-height: 6rem;
        padding: 1.55rem 4rem 1.55rem 2rem;
    }

    .chapter-title {
        font-size: 1.58rem;
    }

    .story-chapter > .chapter-body {
        padding: 1rem clamp(2.4rem, 4vw, 4.25rem) 3.5rem;
    }

    .chapter-prose {
        width: 100%;
        max-width: none;
    }

    .chapter-prose > :where(p, h2, h3, ul, ol, blockquote, .hearing-note, .voice-chain, .source-boundary, .omitted-source-note) {
        width: min(100%, 50rem);
        margin-left: auto;
        margin-right: auto;
    }

    .book-spread--two,
    .goal-matrix,
    .method-spread,
    .sense-cards,
    .practice-pair,
    .stage-spread {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .five-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .course-ladder {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0 1.5rem;
        border-top: 0;
    }

    .course-ladder section {
        grid-template-columns: 6.5rem minmax(0, 1fr);
        border-top: 1px solid var(--jazz-line);
    }
}

@media (max-width: 1100px) {
    .reading-shell {
        grid-template-columns: minmax(0, 1fr);
        width: min(calc(100% - 2.5rem), 52rem);
    }

    .article-toc {
        display: none;
    }

    .mobile-toc {
        position: relative;
        display: block;
        margin: 0 0 2rem;
        border-top: 1px solid var(--jazz-line);
        border-bottom: 1px solid var(--jazz-line);
    }

    .mobile-toc > summary {
        position: relative;
        min-height: 3.25rem;
        padding: 0.85rem 2.75rem 0.85rem 0;
        color: var(--jazz-navy);
        cursor: pointer;
        font-weight: 750;
        list-style: none;
    }

    .mobile-toc > summary::after {
        right: 0.35rem;
    }

    .mobile-toc ol {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.25rem 1rem;
        padding: 0 0 1rem;
    }

    .mobile-toc a {
        display: block;
        padding: 0.35rem 0;
        color: var(--jazz-muted);
        font-size: 0.84rem;
        text-decoration: none;
    }
}

@media (max-width: 768px) {
    .jazz-main {
        padding: 6.2rem 0 4rem;
    }

    .reading-shell {
        width: min(calc(100% - 2.25rem), 52rem);
    }

    .post {
        font-size: 1rem;
        line-height: 1.84;
    }

    .post h1 {
        font-size: 2.45rem;
    }

    .overview-card {
        padding: 1.25rem;
    }

    .thesis-grid,
    .five-grid,
    .book-spread--two,
    .goal-matrix,
    .method-spread,
    .sense-cards,
    .practice-pair,
    .stage-spread {
        grid-template-columns: minmax(0, 1fr);
    }

    .story-chapter > summary {
        min-height: 4.75rem;
        padding: 1.1rem 3rem 1.1rem 1.05rem;
    }

    .story-chapter > .chapter-body {
        padding: 0.6rem 1.05rem 2rem;
    }

    .chapter-title {
        font-size: 1.18rem;
    }

    .voice-chain {
        display: grid;
        grid-template-columns: 1fr;
    }

    .voice-chain i {
        transform: rotate(90deg);
        text-align: center;
    }

    .course-ladder section {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }
}

@media (max-width: 520px) {
    .mobile-toc ol {
        grid-template-columns: 1fr;
    }

    .signal-chain {
        gap: 0.28rem;
    }

    .signal-chain span {
        padding-inline: 0.28rem;
    }

    .chapter-number {
        grid-row: auto;
    }

    .story-chapter > summary {
        grid-template-columns: 1fr;
    }

    .chapter-meta {
        padding-right: 0.25rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .story-chapter > summary::after,
    .mobile-toc > summary::after,
    .article-toc a {
        transition: none;
    }
}

@media print {
    .jazz-page {
        background: #fff;
    }

    .jazz-page .navbar,
    .article-toc,
    .mobile-toc,
    .back-link,
    .read-next,
    .jazz-footer {
        display: none !important;
    }

    .jazz-main {
        padding: 0;
    }

    .reading-shell,
    .reading-column {
        display: block;
        width: 100%;
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    .story-chapter {
        break-inside: avoid-page;
        border-color: #bbb;
        box-shadow: none;
    }

    .story-chapter > summary::after {
        display: none;
    }

    .book-spread--two,
    .goal-matrix,
    .method-spread,
    .sense-cards,
    .practice-pair,
    .stage-spread {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}