:root {
    --bg: #ffffff;
    --bg2: #f4f4f5;
    --surface: #ececee;
    --border: #e4e4e7;
    --accent: #236cff;
    --accent2: #1a52cc;
    --text: #18181b;
    --mid: #3c4348;
    --muted: #5e5e66;
    --sans: "IBM Plex Sans", system-ui, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, monospace;
    --serif: "Instrument Serif", serif;
    /* Height the fixed header actually occupies. The content offset and
       hash-jump scroll-padding both derive from this so nothing hides
       under the header. Kept in sync with `nav` padding per breakpoint. */
    --header-h: 5.25rem;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    /* Hash jumps (#cs-01, #about) land below the fixed header, not under it. */
    scroll-padding-top: var(--header-h);
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-weight: 400;
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav-name {
    font-family: var(--serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text);
}
.nav-links {
    display: flex;
    gap: 3rem;
    list-style: none;
}
.nav-links a {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--mid);
    text-decoration: none;
    transition: color 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}
.nav-links a:hover {
    color: var(--accent);
}

.hero {
    padding: 16rem 4rem 10rem;
    max-width: 1100px;
    margin: 0 auto;
}
.hero-eyebrow {
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    margin-bottom: 3rem;
    animation: fadeUp 0.5s ease both 0.1s;
}
.hero h1 {
    font-family: var(--serif);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 600;
    line-height: 1.02;
    letter-spacing: -0.035em;
    margin-bottom: 3rem;
    color: var(--text);
    animation: fadeUp 0.6s ease both 0.2s;
}
.hero h1 em {
    font-style: italic;
    color: var(--accent);
    font-weight: 600;
    text-decoration: underline;
}
.hero-desc {
    font-size: 1.05rem;
    color: var(--mid);
    max-width: 620px;
    line-height: 1.75;
    margin-bottom: 3.5rem;
    font-weight: 400;
    animation: fadeUp 0.6s ease both 0.35s;
}
.hero-desc strong {
    color: var(--text);
    font-weight: 500;
}
.hero-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    animation: fadeUp 0.6s ease both 0.5s;
}
.pill {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0.45rem 0.9rem;
    border-radius: 0;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--mid);
    letter-spacing: 0.02em;
}
.pill.accent {
    background: transparent;
    border-color: var(--text);
    color: var(--text);
}

hr {
    border: none;
    border-top: 1px solid var(--border);
}

.section {
    padding: 8rem 4rem;
    max-width: 1100px;
    margin: 0 auto;
}
.section-label {
    font-family: var(--serif);
    font-size: 2.3rem;
    color: var(--accent);
    font-weight: 400;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    align-items: baseline;
}
.section-label::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

.about-layout {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 6rem;
    align-items: start;
}
.about-text h2 {
    font-family: var(--serif);
    font-size: clamp(1.9rem, 3.4vw, 2.75rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.025em;
    margin-bottom: 2rem;
    color: var(--text);
}
.about-text p {
    color: var(--mid);
    margin-bottom: 1.25rem;
    font-size: 0.97rem;
    line-height: 1.8;
    font-weight: 400;
}
.about-text p strong {
    color: var(--text);
    font-weight: 500;
}

.stats {
    display: flex;
    flex-direction: column;
}
.stat {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
}
.stat:first-child {
    border-top: 1px solid var(--border);
}
.stat-n {
    font-family: var(--serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--accent);
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}
.stat-h {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.3;
    margin-bottom: 0.35rem;
}
.stat-d {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--muted);
    line-height: 1.55;
    letter-spacing: 0.01em;
}

.cs {
    padding: 6rem 0;
    border-top: 1px solid var(--border);
}
.cs:first-child {
    border-top: none;
}

.cs-top {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2rem;
    align-items: start;
    margin-bottom: 3rem;
}
.cs-num {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    font-weight: 500;
    margin-bottom: 1rem;
}
.cs h2 {
    font-family: var(--serif);
    font-size: clamp(1.9rem, 3.6vw, 2.85rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
    color: var(--accent);
}
.cs-sub {
    font-size: 0.95rem;
    color: var(--muted);
    font-weight: 400;
    line-height: 1.55;
    max-width: 540px;
}
.cs-tags {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    align-items: flex-end;
    min-width: 200px;
}
.cs-tag {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--muted);
    text-align: right;
    letter-spacing: 0.02em;
}

.img-ph {
    width: 100%;
    aspect-ratio: 16/7;
    background: var(--bg2);
    border: 1px solid var(--border);
    position: relative;
    margin: 3rem 0;
    border-radius: 0;
    overflow: hidden;
    cursor: zoom-in;
}
.img-ph::after {
    content: attr(data-label);
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    pointer-events: none;
}
.img-ph.has-image::after {
    content: none;
}
/* Once a real image loads, let the box size to the image (no letterboxing). */
.img-ph.has-image {
    aspect-ratio: auto;
    background: transparent;
}
.img-ph img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.img-ph.has-image img {
    position: static;
    height: auto;
}
.img-ph img[src=""],
.img-ph img:not([src]) {
    display: none;
}
/* broken/missing image: hide the broken <img>, keep the labeled placeholder box */
.img-ph.missing {
    cursor: default;
}
.img-ph.missing img {
    display: none;
}
.img-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 3rem 0;
    align-items: start;
}
/* Small UI chip (e.g. the plugin rating card): keep it at natural size, centered,
   so it doesn't get blown up to full width and go blurry. */
.img-ph.rating-card {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
    cursor: default;
}

.img-grid .img-ph {
    aspect-ratio: 4/3;
    margin: 0;
}
.img-grid .img-ph.has-image {
    aspect-ratio: auto;
}
.caption {
    font-family: var(--sans);
    font-size: 0.85rem;
    font-style: italic;
    line-height: 1.6;
    color: var(--muted);
    margin: 0.85rem 0 3rem;
    text-align: center;
}
/* pull up under a preceding image so it reads as that image's caption */
.caption.under-image {
    margin-top: -1.75rem;
}

/* ── CODE BLOCK (AGENTS.md etc.) ── */
.code-block {
    margin: 3rem 0;
    border-radius: 12px;
    overflow: hidden;
    background: #1e2430;
    border: 1px solid #2a3140;
    box-shadow: 0 12px 30px rgba(24, 40, 90, 0.12);
}
.code-block-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0.75rem 1rem;
    background: #161b24;
    position: relative;
}
.code-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    display: inline-block;
}
.code-dot-r {
    background: #ff5f57;
}
.code-dot-y {
    background: #febc2e;
}
.code-dot-g {
    background: #28c840;
}
.code-block-name {
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: #8b95a7;
    pointer-events: none;
}
.code-block pre {
    margin: 0;
    padding: 1.5rem 1.75rem;
    overflow-x: auto;
}
.code-block code {
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.75;
    color: #cdd6e5;
    white-space: pre;
}
.code-block .c-cm {
    color: #6b7688;
}
.code-block .c-str {
    color: #7dd3a8;
}

/* ── ARTIFACT CALLOUT (guide, doc references) ── */
.artifact {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin: 1.5rem 0;
    padding: 1.15rem 1.35rem;
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    background: var(--bg2);
}
.artifact-icon {
    font-family: var(--mono);
    font-size: 1rem;
    color: var(--accent);
    line-height: 1.6;
    flex-shrink: 0;
}
.artifact-title {
    font-family: var(--sans);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}
.artifact-desc {
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--muted);
    line-height: 1.6;
    margin: 0;
}
.artifact-desc strong {
    color: var(--text);
    font-weight: 600;
}
/* small proof-of-existence thumbnail for a document */
.doc-thumb {
    margin: 1.75rem auto 0;
    max-width: 680px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(24, 40, 90, 0.08);
}
.doc-thumb img {
    display: block;
    width: 100%;
    height: auto;
}

/* ── CASE STUDY VIDEO ── */
.cs-video {
    margin: 3rem 0;
}
.cs-video-frame {
    position: relative;
    line-height: 0;
}
.cs-video video {
    display: block;
    width: 100%;
    height: auto;
    background: var(--bg2);
    border: 1px solid var(--border);
}
.cs-video-play {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.9rem;
    background: rgba(24, 24, 27, 0.35);
    border: none;
    color: #fff;
    cursor: pointer;
    transition: background 0.15s;
    line-height: 1.4;
}
.cs-video-play:hover {
    background: rgba(24, 24, 27, 0.5);
}
.cs-video-play svg {
    width: 34px;
    height: 34px;
    padding: 1rem;
    box-sizing: content-box;
    border: 1.5px solid rgba(255, 255, 255, 0.85);
    border-radius: 50%;
    transition:
        transform 0.15s,
        border-color 0.15s;
}
.cs-video-play:hover svg {
    transform: scale(1.06);
    border-color: #fff;
}
.cs-video-play span {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.cs-video-frame.playing .cs-video-play {
    display: none;
}
/* ── SEGMENT TABLE ── */
.segment-table {
    width: 100%;
    border-collapse: collapse;
    margin: 3rem 0;
    border-top: 1px solid var(--text);
    border-bottom: 1px solid var(--text);
}
.segment-table caption {
    font-family: var(--sans);
    font-size: 0.85rem;
    font-style: italic;
    color: var(--muted);
    text-align: left;
    margin-bottom: 1rem;
}
.segment-table th,
.segment-table td {
    text-align: left;
    vertical-align: top;
    padding: 1rem 1.25rem 1rem 0;
    border-bottom: 1px solid var(--border);
}
.segment-table thead th {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}
.segment-table tbody th {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    width: 1%;
}
.segment-table tbody td {
    font-family: var(--sans);
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--muted);
}
.segment-table tbody tr:last-child th,
.segment-table tbody tr:last-child td {
    border-bottom: none;
}

/* ── FINDING LIST ── */
.finding-list {
    margin: 1.25rem 0;
    padding-left: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.finding-list li {
    line-height: 1.65;
}
.finding-list strong {
    color: var(--text);
}

@media (max-width: 720px) {
    .segment-table th,
    .segment-table td {
        padding: 0.85rem 0.75rem 0.85rem 0;
    }
    .segment-table tbody th {
        white-space: normal;
    }
}

/* ── ACT LABEL ── */
.act-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 4rem 0 2.5rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border);
}

/* Audit table (4 columns — let row headers wrap, tighten cells) */
.audit-table tbody th {
    white-space: normal;
    width: auto;
}
.audit-table th,
.audit-table td {
    padding: 0.9rem 1rem 0.9rem 0;
    font-size: 0.85rem;
}

/* Inline code (within case-study prose) */
.cs-cols code,
.segment-table code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--surface);
    padding: 0.1em 0.35em;
    border-radius: 3px;
    color: var(--text);
}

/* ── INLINE DIAGRAMS ── */
.diagram {
    margin: 2.5rem 0;
}
.diagram figcaption {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1.1rem;
}
.diagram-table {
    margin: 0;
}
.diagram-note {
    font-size: 0.85rem;
    font-style: italic;
    color: var(--muted);
    margin-top: 1rem;
}

/* Bar chart (survey highlights) */
.bar-chart {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border-top: 1px solid var(--text);
    border-bottom: 1px solid var(--text);
    padding: 1.5rem 0;
}
.bar-chart li {
    display: grid;
    grid-template-columns: minmax(0, 15rem) 1fr auto;
    align-items: center;
    gap: 1rem;
}
.bar-label {
    font-size: 0.9rem;
    color: var(--text);
}
.bar-track {
    height: 0.5rem;
    background: var(--surface);
    border-radius: 999px;
    overflow: hidden;
}
.bar-fill {
    display: block;
    height: 100%;
    background: var(--accent);
    border-radius: 999px;
}
.bar-val {
    font-family: var(--mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    text-align: right;
    min-width: 3.5rem;
}

@media (max-width: 720px) {
    .bar-chart li {
        grid-template-columns: 1fr auto;
        grid-template-areas:
            "label val"
            "track track";
        gap: 0.5rem 1rem;
    }
    .bar-label {
        grid-area: label;
    }
    .bar-val {
        grid-area: val;
    }
    .bar-track {
        grid-area: track;
    }
}

/* ── LIGHTBOX ── */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(24, 24, 27, 0.78);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    padding: 2rem;
}
.lightbox.open {
    display: flex;
}
.lightbox img {
    max-width: 92vw;
    max-height: 88vh;
    object-fit: contain;
    border-radius: 0;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
    animation: lbIn 0.2s ease both;
    cursor: zoom-in;
}
/* Zoomed state: switch to block layout so overflow scrolls in BOTH axes to pan. */
.lightbox.zoomed {
    display: block;
    overflow: auto;
    cursor: grab;
    padding: 0;
    text-align: center;
}
.lightbox.zoomed:active {
    cursor: grabbing;
}
.lightbox.zoomed img {
    max-width: none;
    max-height: none;
    height: auto;
    /* width set inline by JS to a real multiple of the fitted size */
    cursor: grab;
    margin: 0 auto;
    animation: none;
    display: block;
}
.lightbox.zoomed:active img {
    cursor: grabbing;
}
.lightbox-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition:
        color 0.15s,
        border-color 0.15s,
        background 0.15s;
}
.lightbox-close:hover {
    color: #fff;
    border-color: #fff;
    background: rgba(255, 255, 255, 0.08);
}
.lightbox-close svg {
    width: 16px;
    height: 16px;
}
@keyframes lbIn {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.cs-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}
.cs-cols.full {
    grid-template-columns: 1fr;
}
.cs-cols.reconcile > div {
    background: var(--bg2);
    border-top: 2px solid var(--accent);
    padding: 1.5rem 1.75rem 0.5rem;
}
.cs-cols.reconcile .finding-list {
    margin-top: 0;
}
.col-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    font-weight: 500;
    margin-bottom: 1rem;
}
.cs-cols h3 {
    font-family: var(--sans);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.015em;
    margin-bottom: 1rem;
    color: var(--text);
}
.cs-cols p {
    font-size: 0.95rem;
    color: var(--mid);
    line-height: 1.75;
    margin-bottom: 1rem;
    font-weight: 400;
}
.cs-cols p strong {
    color: var(--text);
    font-weight: 500;
}

.pullquote {
    margin: 3rem 0;
    padding: 2rem 2.25rem;
    background: transparent;
    border-left: 2px solid var(--text);
    border-radius: 0;
}
.pullquote p {
    font-family: var(--serif);
    font-style: italic;
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text);
    line-height: 1.5;
    letter-spacing: -0.01em;
    margin: 0 0 0.75rem;
}
.pullquote cite {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--muted);
    font-style: normal;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.impact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--text);
    border-bottom: 1px solid var(--text);
    margin: 3rem 0;
    background: transparent;
}
.impact-item {
    padding: 2rem 1.5rem;
    border-right: 1px solid var(--border);
}
.impact-item:last-child {
    border-right: none;
}
.impact-n {
    font-family: var(--serif);
    color: var(--accent);
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
}
.impact-d {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--muted);
    line-height: 1.55;
    letter-spacing: 0.01em;
}

.reflection {
    padding: 2rem 2.25rem;
    border-left: 2px solid var(--border);
    background: transparent;
    margin-top: 2.5rem;
}
.reflection-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    font-weight: 500;
    margin-bottom: 1rem;
}
.reflection p {
    font-size: 0.95rem;
    color: var(--mid);
    line-height: 1.75;
    font-style: italic;
    font-family: var(--sans);
    font-weight: 400;
}

/* ── CASE STUDY FOOTER NAV ── */
/* ── CASE STUDY TOP BAR (breadcrumb home + compact prev/next) ── */
.cs-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}
.cs-top-home,
.cs-top-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 44px;
    background: transparent;
    border: none;
    padding: 0.4rem 0.6rem;
    margin: -0.4rem -0.6rem;
    cursor: pointer;
    color: var(--mid);
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    transition: color 0.15s;
}
.cs-top-home:hover,
.cs-top-btn:hover {
    color: var(--accent);
}
.cs-top-pager {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-width: 0;
}
.cs-top-num {
    color: var(--muted);
    flex-shrink: 0;
}
.cs-top-title::before {
    content: ": ";
    color: var(--muted);
}
.cs-top-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 16ch;
}
.cs-top-arrow {
    font-size: 1rem;
    flex-shrink: 0;
    transition: transform 0.15s;
}
.cs-top-home:hover .cs-top-arrow,
.cs-top-btn.prev:hover .cs-top-arrow {
    transform: translateX(-3px);
}
.cs-top-btn.next:hover .cs-top-arrow {
    transform: translateX(3px);
}

@media (max-width: 720px) {
    .cs-topbar {
        margin-bottom: 2rem;
        padding-bottom: 1rem;
        gap: 0.75rem;
    }
    .cs-top-pager {
        gap: 1rem;
    }
    /* Titles get long on small screens — show just the arrows + number cue.
       The full titled prev/next still lives in the footer nav. */
    .cs-top-title {
        display: none;
    }
    .cs-top-home,
    .cs-top-btn {
        font-size: 0.66rem;
    }
}

.cs-footer-nav {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 1rem;
    margin-top: 5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border);
}
.cs-nav-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 60%;
    background: transparent;
    border: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    color: var(--text);
    transition:
        border-color 0.15s,
        background 0.15s;
}
.cs-nav-btn.next {
    text-align: right;
}
.cs-nav-btn:hover {
    border-color: var(--text);
    background: var(--bg2);
}
.cs-nav-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}
.cs-nav-btn.next .cs-nav-text {
    align-items: flex-end;
}
.cs-nav-label {
    font-family: var(--mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
}
.cs-nav-title {
    font-family: var(--sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.25;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}
.cs-nav-arrow {
    font-size: 1.35rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform 0.15s;
}
.cs-nav-btn:hover .cs-nav-arrow {
    transform: translateX(-3px);
}
.cs-nav-btn.next:hover .cs-nav-arrow {
    transform: translateX(3px);
}

@media (max-width: 720px) {
    .cs-footer-nav {
        gap: 0.6rem;
    }
    .cs-nav-btn {
        flex: 1 1 0;
        max-width: none;
        min-width: 0;
        padding: 0.85rem 0.9rem;
        gap: 0.5rem;
    }
    .cs-nav-title {
        font-size: 0.85rem;
    }
    .cs-nav-label {
        font-size: 0.62rem;
    }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* ── SCROLL NAV ── */
.scroll-nav {
    position: fixed;
    top: 50%;
    right: 2.5rem;
    z-index: 200;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-end;
}
.scroll-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    text-decoration: none;
}
.scroll-nav-label {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0;
    transform: translateX(4px);
    transition:
        opacity 0.2s,
        transform 0.2s,
        color 0.2s;
    white-space: nowrap;
    pointer-events: none;
}
.scroll-nav-item:hover .scroll-nav-label,
.scroll-nav-item.active .scroll-nav-label {
    opacity: 1;
    transform: translateX(0);
}
.scroll-nav-item.active .scroll-nav-label {
    color: var(--accent);
}
.scroll-nav-dot {
    width: 7px;
    height: 7px;
    border-radius: 0;
    border: 1.5px solid var(--muted);
    background: transparent;
    transition:
        border-color 0.2s,
        background 0.2s,
        transform 0.2s;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
.scroll-nav-item:hover .scroll-nav-dot {
    border-color: var(--accent);
    transform: scale(1.2);
}
.scroll-nav-item.active .scroll-nav-dot {
    border-color: var(--accent);
    background: var(--accent);
}
.scroll-nav-dot-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--accent);
    height: 0%;
    transition: height 0.1s linear;
}
.scroll-nav-item.active .scroll-nav-dot-fill {
    background: var(--accent);
}

@media (max-width: 1100px) {
    .scroll-nav {
        display: none;
    }
}

@media (max-width: 720px) {
    :root {
        /* Nav padding + name line-height shrink here — keep the reserved
           header height in sync. */
        --header-h: 4.25rem;
    }
    nav {
        padding: 1.25rem 1.25rem;
    }
    .nav-name {
        font-size: 1.25rem;
    }
    .nav-links {
        display: flex;
        gap: 1.25rem;
    }
    .nav-links a {
        font-size: 0.66rem;
        letter-spacing: 0.1em;
    }
    .hero {
        padding: 10rem 1.5rem 6rem;
    }
    .section {
        padding: 5rem 1.5rem;
    }
    .about-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .cs-top {
        grid-template-columns: 1fr;
    }
    .cs-tags {
        align-items: flex-start;
        min-width: 0;
    }
    .cs-cols {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .img-grid {
        grid-template-columns: 1fr;
    }
    .impact {
        grid-template-columns: 1fr 1fr;
    }
    .impact-item:nth-child(2) {
        border-right: none;
    }
    .impact-item:nth-child(3) {
        border-top: 1px solid var(--border);
        grid-column: 1/-1;
    }
}

/* ── TWO-COLUMN LAYOUT ── */
.layout-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 5rem;
    max-width: 1500px;
    margin: 0 auto;
    /* Reserve the header height + a deliberate gap so content never tucks
       under the fixed nav. */
    padding: calc(var(--header-h) + 2.5rem) 4rem 4rem;
    align-items: start;
}
.layout-left {
    position: sticky;
    top: calc(var(--header-h) + 1rem);
    align-self: start;
    padding: 1.5rem 0 2rem;
}
.layout-right {
    min-width: 0;
    padding-top: 4rem;
}

/* Compact hero inside left column */
.layout-left .hero {
    padding: 0;
    max-width: none;
    margin: 0 0 3rem;
}
.layout-left .hero-eyebrow {
    margin-bottom: 1.75rem;
}
.layout-left .hero h1 {
    font-size: clamp(2rem, 3.6vw, 3.1rem);
    margin-bottom: 2rem;
    line-height: 1.05;
}
.layout-left .hero-desc {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: none;
}
.layout-left .hero-pills {
    margin-bottom: 0;
}

/* Overexplain toggle */
.oe-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-top: 2rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    transition: color 0.15s;
}
.oe-toggle:hover {
    color: var(--accent);
}
.oe-switch {
    position: relative;
    display: inline-flex;
    width: 32px;
    height: 18px;
    border-radius: 999px;
    background: var(--border);
    transition: background 0.2s ease;
    flex-shrink: 0;
}
.oe-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease;
}
.oe-toggle[aria-pressed="true"] .oe-switch {
    background: var(--accent);
}
.oe-toggle[aria-pressed="true"] .oe-thumb {
    transform: translateX(14px);
}

/* Inline overexplain asides */
.oe-aside {
    display: none;
    color: var(--muted);
    font-style: italic;
}
body.overexplain .oe-aside {
    display: inline;
    animation: oeFade 0.35s ease both;
}
@keyframes oeFade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ── CARD INDEX (stacked Option B cells) ── */
.work-index {
    display: block;
}
.work-index .section-label {
    margin-bottom: 2.5rem;
}
.card-list {
    display: flex;
    flex-direction: column;
}
.card-cell {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2.5rem 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.18s ease;
}
.card-cell:hover .card-title {
    color: var(--accent);
}
.card-thumb {
    aspect-ratio: 16 / 9;
    background: var(--bg2);
    border: 1px solid var(--border);
    overflow: hidden;
    position: relative;
}
.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.card-thumb img[src=""],
.card-thumb img:not([src]) {
    display: none;
}
.card-thumb-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    text-align: center;
    padding: 0.5rem;
    pointer-events: none;
}
.card-thumb.has-image .card-thumb-text {
    display: none;
}
.card-cell-body {
    min-width: 0;
}
.card-title {
    font-family: var(--sans);
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 0.55rem;
    transition: color 0.15s;
}
.card-sub {
    font-size: 0.94rem;
    color: var(--mid);
    line-height: 1.55;
}
.card-cell-foot {
    display: flex;
    justify-content: flex-start;
}

/* ── WORK CONTENT + ABOUT PAGE (SPA swap) ── */
.work-content,
.about-page {
    display: none;
}
body.cs-view .work-index,
body.about-view .work-index {
    display: none;
}
body.cs-view .work-content {
    display: block;
}
body.about-view .about-page {
    display: block;
}

/* Detail views (case study or about) — hide left aside, full width */
body.cs-view .layout-left,
body.about-view .layout-left {
    display: none;
}
body.cs-view .layout-grid,
body.about-view .layout-grid {
    grid-template-columns: 1fr;
    max-width: 1100px;
    gap: 0;
}

.work-content .cs {
    display: none;
    padding: 0 0 4rem;
    border-top: none;
}
.work-content .cs.active {
    display: block;
}
a.nav-name {
    text-decoration: none;
    transition: color 0.15s;
    font-family: var(--serif);
}
a.nav-name:hover {
    color: var(--accent);
}

/* About page (full-width view) */
.about-page .section-label {
    margin-bottom: 3rem;
}

/* Hide sidebar dots in new layout */
.scroll-nav {
    display: none !important;
}

/* Responsive: stack at <=1024px */
@media (max-width: 1024px) {
    .layout-grid {
        display: block;
        max-width: 1100px;
        padding: calc(var(--header-h) + 2rem) 1.5rem 2rem;
    }
    .layout-left {
        position: static;
        height: auto;
        overflow: visible;
        padding: 1rem 0 3rem;
        margin-bottom: 1rem;
    }
    .layout-left .hero h1 {
        font-size: clamp(2.5rem, 7vw, 4.5rem);
    }
    .layout-right {
        padding-top: 0;
    }
    .card-cell {
        padding: 2rem 0;
        gap: 1.25rem;
    }
}

@media (max-width: 720px) {
    .card-cell {
        padding: 1.75rem 0;
        gap: 1rem;
    }
    .card-title {
        font-size: 1.15rem;
    }
    .card-sub {
        font-size: 0.86rem;
    }
    .card-impact {
        font-size: 1.25rem;
    }
}

/* ── EXPERTISE ── */
.expertise {
    margin-top: 5rem;
}
.expertise-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border-top: 1px solid var(--text);
}
.exp-item {
    padding: 2.25rem 1.35rem 2.5rem;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}
.exp-item:first-child {
    padding-left: 0;
}
.exp-item:last-child {
    border-right: none;
    padding-right: 0;
}
.exp-num {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.14em;
    margin-bottom: 1.25rem;
}
.exp-title {
    font-family: var(--sans);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.3;
    letter-spacing: -0.015em;
    margin-bottom: 1rem;
}
.exp-desc {
    font-family: var(--sans);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--muted);
    line-height: 1.65;
}

@media (max-width: 720px) {
    .expertise {
        margin-top: 3rem;
    }
    .expertise-row {
        grid-template-columns: 1fr;
    }
    .exp-item {
        padding: 1.75rem 0;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .exp-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
}

/* ── STACK STRIP ── */
.stack {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.stack-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}
.stack-groups {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.stack-group {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.stack-cat {
    font-family: var(--serif);
    font-style: italic;
    font-size: 1.15rem;
    color: var(--text);
}
.stack-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.stack-tag {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    color: var(--muted);
    letter-spacing: 0.02em;
}

@media (max-width: 720px) {
    .stack-groups {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }
}

/* ── EXPERIENCE + EDUCATION ── */
.experience,
.education {
    margin-top: 5rem;
}
.role-list {
    border-top: 1px solid var(--text);
}
.role {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 2.5rem;
    padding: 2rem 0 2.25rem;
    border-bottom: 1px solid var(--border);
}
.role-list .role:last-child {
    border-bottom: 1px solid var(--text);
}
.role-meta {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding-top: 0.25rem;
}
.role-dates {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.role-loc {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--muted);
    letter-spacing: 0.04em;
}
.role-content {
    min-width: 0;
}
.role-title {
    font-family: var(--sans);
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.3;
    letter-spacing: -0.015em;
    margin-bottom: 0.85rem;
}
.role-title .role-company {
    color: var(--muted);
    font-weight: 400;
}
.role-desc {
    font-family: var(--sans);
    font-size: 0.92rem;
    color: var(--mid);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}
.role-desc sup {
    color: var(--accent);
    font-size: 0.7em;
}
.role-footnote {
    font-family: var(--sans);
    font-style: italic;
    font-size: 0.7rem;
    color: var(--muted);
    line-height: 1.6;
    margin-top: 0.85rem;
}
.role-footnote sup {
    color: var(--accent);
    font-style: normal;
    font-size: 0.65em;
    margin-right: 0.15rem;
}
.role-bullets {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
}
.role-bullets li {
    font-family: var(--sans);
    font-size: 0.88rem;
    color: var(--mid);
    line-height: 1.65;
    padding: 0.18rem 0 0.18rem 1rem;
    position: relative;
}
.role-bullets li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--muted);
}
.role-ref {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--muted);
    letter-spacing: 0.01em;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.15s;
}
a.role-ref {
    text-underline-offset: 2px;
}
a.role-ref:hover {
    color: var(--accent);
    text-decoration: underline;
}

@media (max-width: 720px) {
    .experience,
    .education {
        margin-top: 3rem;
    }
    .role {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        padding: 1.5rem 0 1.75rem;
    }
    .role-meta {
        flex-direction: row;
        gap: 1rem;
        padding-top: 0;
    }
    .role-title {
        font-size: 1.05rem;
    }
}