/* ============================================================================
   The Librarian — website
   "The Reading Room", told as a story. Inherits the product's design system.
   Light = Manuscript (default) · Dark = Scriptorium.
   ========================================================================== */

/* ---- Tokens ---------------------------------------------------------------- */
:root {
    /* Manuscript (light) */
    --paper-body: #f5f1e8;
    --paper-surface: #faf7f0;
    --ink: #1a1612;
    --ink-soft: #4a4339;
    --mono-fill: #ede7d8;
    --accent: #3f9c8e; /* verdigris — the rubric */
    --accent-ink: #14322d; /* readable ink-on-accent */
    --on-accent: #11201d; /* text on a filled accent button */
    --copper: #b87333;
    --copper-soft: rgba(184, 115, 51, 0.34);
    --hairline: rgba(26, 22, 18, 0.14);
    --hairline-strong: rgba(26, 22, 18, 0.26);
    --scrim: 245, 241, 232; /* paper-body as rgb, for hero scrim */
    --shadow-plate: none;

    --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
    --font-body: 'Newsreader', Georgia, 'Times New Roman', serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;

    --fs-hero: clamp(2.6rem, 1.4rem + 4.6vw, 5rem);
    --fs-h2: clamp(1.85rem, 1.1rem + 2.7vw, 2.85rem);
    --fs-body: clamp(1.06rem, 1rem + 0.32vw, 1.22rem);
    --fs-lede: clamp(1.18rem, 1.05rem + 0.7vw, 1.5rem);
    --lh-body: 1.62;

    --measure: 62ch;
    --content-max: 1180px;
    --section-y: clamp(3rem, 2rem + 5vw, 6rem);
    --gutter: clamp(1.25rem, 0.5rem + 4vw, 4rem);

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --z-nav: 100;

    color-scheme: light;
}

[data-theme='dark'] {
    /* Scriptorium (dark) */
    --paper-body: #0e2a36;
    --paper-surface: #163847;
    --ink: #e8d9b8;
    --ink-soft: #b9ac90;
    --mono-fill: #1a3a48;
    --accent: #7dd3c0; /* cyan — the rubric */
    --accent-ink: #9fe0d0;
    --on-accent: #0a2129; /* text on a filled accent button */
    --copper: #d49872;
    --copper-soft: rgba(212, 152, 114, 0.4);
    --hairline: rgba(232, 217, 184, 0.16);
    --hairline-strong: rgba(232, 217, 184, 0.3);
    --scrim: 14, 42, 54; /* teal-body as rgb */

    color-scheme: dark;
}

/* ---- Reset / base ---------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}
* {
    margin: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: no-preference) {
    html:focus-within {
        scroll-behavior: smooth;
    }
}

body {
    background: var(--paper-body);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: var(--lh-body);
    font-optical-sizing: auto;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
}
a:not(.btn):not(.brand) {
    color: var(--accent-ink);
    text-decoration-color: var(--copper-soft);
    text-underline-offset: 0.18em;
}
a:not(.btn):not(.brand):hover {
    text-decoration-color: var(--accent);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 0;
}

/* ---- Typography ------------------------------------------------------------ */
h1,
h2,
h3 {
    font-family: var(--font-display);
    font-weight: 460;
    line-height: 1.08;
    letter-spacing: -0.02em;
    text-wrap: balance;
    color: var(--ink);
}
h1 {
    font-size: var(--fs-hero);
}
h2 {
    font-size: var(--fs-h2);
}
p {
    text-wrap: pretty;
}

.measure {
    max-width: var(--measure);
    margin-inline: auto;
}
.measure > * + * {
    margin-top: 1.1em;
}

.kicker,
.chapter-mark,
.flow-label,
.verb dt,
.nav-links a,
.brand-name,
.nav-actions .btn-sm,
.flow-note,
.copy-label {
    font-family: var(--font-mono);
}
.scene-text code,
.plate-text code,
.measure code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    color: var(--accent-ink);
    background: var(--mono-fill);
    padding: 0.1em 0.4em;
    border-radius: 2px;
    white-space: nowrap;
}
.kicker {
    font-size: 0.8rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 1rem;
}
.chapter-mark {
    font-size: 1rem;
    letter-spacing: 0.1em;
    color: var(--copper);
    margin-bottom: 0.9rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* ---- Skip link ------------------------------------------------------------- */
.skip-link {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    transform: translateY(-110%);
    background: var(--ink);
    color: var(--paper-body);
    padding: 0.7rem 1.1rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: transform 0.2s var(--ease);
}
.skip-link:focus {
    transform: translateY(0);
}

/* ---- Buttons --------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    font-family: var(--font-mono);
    font-size: 0.92rem;
    line-height: 1;
    padding: 0.85em 1.3em;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition:
        background 0.25s var(--ease),
        color 0.25s var(--ease),
        border-color 0.25s var(--ease),
        transform 0.25s var(--ease);
}
.btn .icon {
    transition: transform 0.25s var(--ease);
}
.btn-primary {
    background: var(--accent);
    color: var(--on-accent);
    border-color: var(--accent);
    font-weight: 500;
}
.btn-primary:hover {
    transform: translateY(-2px);
}
.btn-primary:hover .icon {
    transform: translate(2px, -2px);
}
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--hairline-strong);
}
.btn-ghost:hover {
    border-color: var(--ink);
}
.btn-ghost:hover .icon {
    transform: translate(2px, -2px);
}
.btn-sm {
    padding: 0.6em 1em;
    font-size: 0.82rem;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.8rem;
}

.icon-btn {
    display: inline-grid;
    place-items: center;
    width: 2.4rem;
    height: 2.4rem;
    background: transparent;
    border: 1px solid var(--hairline-strong);
    color: var(--ink);
    cursor: pointer;
    transition:
        border-color 0.25s var(--ease),
        color 0.25s var(--ease);
}
.icon-btn:hover {
    border-color: var(--ink);
    color: var(--accent-ink);
}
.icon-moon {
    display: none;
}
[data-theme='dark'] .icon-sun {
    display: none;
}
[data-theme='dark'] .icon-moon {
    display: block;
}

/* ---- Nav ------------------------------------------------------------------- */
.site-nav {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.85rem var(--gutter);
    background: color-mix(in srgb, var(--paper-body) 88%, transparent);
    border-bottom: 1px solid transparent;
    transition:
        border-color 0.3s var(--ease),
        background 0.3s var(--ease);
}
@supports (backdrop-filter: blur(8px)) {
    .site-nav {
        backdrop-filter: blur(10px) saturate(1.1);
    }
}
.site-nav[data-elevate='true'] {
    border-bottom-color: var(--hairline);
    background: color-mix(in srgb, var(--paper-body) 94%, transparent);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--ink);
    margin-right: auto;
}
.brand-name {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.04em;
}
.brand-orb {
    width: 0.62rem;
    height: 0.62rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow:
        0 0 0 1px color-mix(in srgb, var(--accent) 50%, transparent),
        0 0 12px color-mix(in srgb, var(--accent) 65%, transparent);
}
.nav-links {
    display: flex;
    gap: 1.4rem;
}
.nav-links a {
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    text-decoration: none;
    color: var(--ink-soft);
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
    transition:
        color 0.2s var(--ease),
        border-color 0.2s var(--ease);
}
.nav-links a:hover {
    color: var(--ink);
    border-bottom-color: var(--accent);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

/* ---- Hero (overlaid) ------------------------------------------------------- */
.hero {
    position: relative;
    min-height: min(92vh, 880px);
    display: grid;
    isolation: isolate;
    overflow: hidden;
}
.hero-img {
    position: absolute;
    inset: 0;
    z-index: -2;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 72% center;
}
.hero-scrim {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(
            100deg,
            rgba(var(--scrim), 0.97) 0%,
            rgba(var(--scrim), 0.92) 26%,
            rgba(var(--scrim), 0.55) 50%,
            rgba(var(--scrim), 0.05) 74%
        ),
        linear-gradient(
            to top,
            rgba(var(--scrim), 0.85) 0%,
            rgba(var(--scrim), 0) 28%
        );
}
.hero-inner {
    align-self: center;
    max-width: 40rem;
    padding: clamp(5rem, 9vh, 8rem) var(--gutter) clamp(3rem, 6vh, 5rem);
}
#hero-title {
    letter-spacing: -0.03em;
}
.hero-lede {
    font-family: var(--font-body);
    font-size: var(--fs-lede);
    line-height: 1.45;
    color: var(--ink-soft);
    margin-top: 1.3rem;
    max-width: 34rem;
}
.scroll-cue {
    position: absolute;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    width: 1.7rem;
    height: 2.7rem;
    border: 1px solid var(--hairline-strong);
    border-radius: 1rem;
    display: grid;
    place-items: start center;
    padding-top: 0.45rem;
}
.scroll-cue span {
    width: 0.28rem;
    height: 0.55rem;
    border-radius: 1rem;
    background: var(--accent);
    animation: cue 1.8s var(--ease) infinite;
}
@keyframes cue {
    0% {
        opacity: 0;
        transform: translateY(-3px);
    }
    40% {
        opacity: 1;
    }
    80%,
    100% {
        opacity: 0;
        transform: translateY(7px);
    }
}

/* ---- Chapter rhythm -------------------------------------------------------- */
.chapter {
    padding: var(--section-y) var(--gutter);
    position: relative;
}
.chapter + .chapter {
    padding-top: 0;
}
.chapter p {
    color: var(--ink-soft);
}
.chapter h2 + p,
.chapter .roadmap {
    margin-top: 1.1rem;
}

/* Section divider ornament between chapters */
.chapter:not(.plate):not(.closing)::before,
.plate::before {
    content: '';
    display: block;
    width: 1px;
    height: clamp(2.5rem, 6vw, 4rem);
    background: linear-gradient(var(--copper-soft), transparent);
    margin: 0 auto;
}

/* ---- Figures / plates (gilt-mounted) -------------------------------------- */
figure {
    margin: 0;
}
.scene-figure,
.plate-figure,
.closing-figure,
.inset {
    background: var(--paper-surface);
    padding: clamp(7px, 0.8vw, 13px);
    border: 1px solid var(--copper-soft);
}
.scene-figure img,
.plate-figure img,
.closing-figure img {
    width: 100%;
}

/* ---- Scene (two-column spread) -------------------------------------------- */
.scene {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 1rem + 4vw, 5rem);
    align-items: center;
    max-width: var(--content-max);
    margin-inline: auto;
}
.scene-text {
    max-width: 34rem;
}
.scene-text > * + * {
    margin-top: 1.1rem;
}
/* the chapter divider ::before is a grid item here — keep it on its own full row */
.scene::before {
    grid-column: 1 / -1;
}
.scene-figure {
    order: 2;
}
.scene-text {
    order: 1;
}
.scene--reverse .scene-figure {
    order: 1;
}
.scene--reverse .scene-text {
    order: 2;
}

/* ---- Plate (full-width art + centred text) -------------------------------- */
.plate {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(2rem, 4vw, 3.4rem);
}
.plate-figure {
    width: min(100%, 760px);
}
.plate-figure--wide {
    width: min(100%, var(--content-max));
}
.plate-text {
    text-align: center;
}
.plate-text .chapter-mark {
    text-align: center;
}

/* claude-code inset */
.inset {
    width: min(100%, 760px);
}
.inset figcaption {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin-top: 0.7rem;
    text-align: center;
}

/* ---- How it works (flow) -------------------------------------------------- */
.how {
    max-width: var(--content-max);
    margin-inline: auto;
}
.how-head {
    text-align: center;
}
.how-head .chapter-mark {
    text-align: center;
}

.flow {
    margin-top: clamp(2.5rem, 6vw, 4rem);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: clamp(1.5rem, 4vw, 2.6rem) 0;
}
.flow-track {
    list-style: none;
    padding: 0;
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0.4rem;
    flex-wrap: nowrap;
}
.flow-stage {
    flex: 1 1 0;
    min-width: 0;
    padding: 0.4rem clamp(0.6rem, 1.5vw, 1.2rem);
    border-top: 2px solid var(--copper-soft);
}
.flow-stage--curator {
    border-top-color: var(--accent);
    background: linear-gradient(var(--mono-fill), transparent 70%);
}
.flow-label {
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink);
    font-weight: 500;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}
.flow-orb {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 70%, transparent);
    animation: pulse 3.2s var(--ease) infinite;
}
@keyframes pulse {
    0%,
    100% {
        opacity: 0.55;
    }
    50% {
        opacity: 1;
    }
}
.flow-items {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 0.7rem;
}
.flow-items li {
    display: grid;
    gap: 0.1rem;
}
.flow-items .ft {
    font-family: var(--font-body);
    font-size: 1.02rem;
    color: var(--ink);
    line-height: 1.2;
}
.flow-items .fd {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
}
.flow-note {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--accent-ink);
    margin-top: 0.8rem;
    text-transform: uppercase;
}
.flow-link {
    flex: 0 0 1.4rem;
    align-self: center;
    position: relative;
    height: 1px;
    background: var(--copper-soft);
}
.flow-link::after {
    content: '';
    position: absolute;
    right: -1px;
    top: 50%;
    transform: translateY(-50%);
    border-left: 6px solid var(--copper);
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
}
.flow-feedback {
    margin-top: 1.6rem;
    padding-top: 1.2rem;
    border-top: 1px dashed var(--hairline);
    font-size: 0.95rem;
    color: var(--ink-soft);
    text-align: center;
    max-width: 60ch;
    margin-inline: auto;
}
.flow-feedback-mark {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    margin-right: 0.3rem;
}

/* verb legend */
.verbs {
    margin-top: clamp(2rem, 4vw, 3rem);
    display: grid;
    gap: 0;
}
.verb {
    display: grid;
    grid-template-columns: minmax(8rem, 16rem) 1fr;
    gap: 1.2rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--hairline);
}
.verb:first-child {
    border-top: 1px solid var(--hairline);
}
.verb dt {
    font-size: 0.85rem;
    color: var(--ink);
    font-weight: 500;
}
.verb dd {
    color: var(--ink-soft);
}

/* ---- Gallery / carousel --------------------------------------------------- */
.gallery-head {
    text-align: center;
}
.gallery-head .chapter-mark {
    text-align: center;
}
.carousel {
    position: relative;
    margin-top: clamp(2rem, 5vw, 3.4rem);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.6rem;
    max-width: var(--content-max);
    margin-inline: auto;
}
.carousel-track {
    list-style: none;
    padding: 0.5rem 0.25rem;
    margin: 0;
    display: flex;
    gap: clamp(1rem, 2vw, 1.6rem);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
}
.carousel-track::-webkit-scrollbar {
    display: none;
}
.slide {
    flex: 0 0 min(86%, 780px);
    scroll-snap-align: center;
}
.slide figure {
    background: var(--paper-surface);
    padding: clamp(7px, 0.8vw, 12px);
    border: 1px solid var(--copper-soft);
}
.slide img {
    width: 100%;
    border: 1px solid var(--hairline);
}
.slide figcaption {
    font-size: 0.92rem;
    color: var(--ink-soft);
    margin-top: 0.8rem;
    padding: 0 0.2rem;
}
.slide figcaption b {
    color: var(--ink);
    font-weight: 500;
}
.carousel-btn {
    display: inline-grid;
    place-items: center;
    width: 2.6rem;
    height: 2.6rem;
    background: var(--paper-surface);
    border: 1px solid var(--hairline-strong);
    color: var(--ink);
    cursor: pointer;
    transition:
        border-color 0.2s var(--ease),
        color 0.2s var(--ease),
        opacity 0.2s var(--ease);
}
.carousel-btn:hover {
    border-color: var(--ink);
    color: var(--accent-ink);
}
.carousel-btn[disabled] {
    opacity: 0.3;
    cursor: default;
}
.carousel-dots {
    list-style: none;
    padding: 0;
    margin: 1.4rem auto 0;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}
.carousel-dots button {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    padding: 0;
    cursor: pointer;
    background: transparent;
    border: 1px solid var(--hairline-strong);
    transition:
        background 0.2s var(--ease),
        border-color 0.2s var(--ease);
}
.carousel-dots button[aria-current='true'] {
    background: var(--accent);
    border-color: var(--accent);
}

/* ---- Roadmap list --------------------------------------------------------- */
.roadmap {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 0.9rem;
}
.roadmap li {
    position: relative;
    padding-left: 1.6rem;
    color: var(--ink-soft);
}
.roadmap li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 0.5rem;
    height: 0.5rem;
    border: 1px solid var(--copper);
    background: transparent;
}

/* ---- Closing -------------------------------------------------------------- */
.closing {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(2rem, 4vw, 3.4rem);
}
.closing-figure {
    width: min(100%, var(--content-max));
}
.closing-text {
    text-align: center;
}
.closing-text .chapter-mark {
    text-align: center;
}

.command {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin: 1.8rem auto 0;
    max-width: 32rem;
    border: 1px solid var(--hairline-strong);
    background: var(--mono-fill);
    text-align: left;
}
.command pre {
    flex: 1;
    margin: 0;
    padding: 0.9rem 1rem;
    overflow-x: auto;
}
.command code {
    font-family: var(--font-mono);
    font-size: 0.86rem;
    color: var(--ink);
    white-space: pre;
}
.command .prompt {
    color: var(--accent-ink);
}
.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0 1rem;
    background: transparent;
    border: none;
    border-left: 1px solid var(--hairline-strong);
    color: var(--ink-soft);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    cursor: pointer;
    transition:
        color 0.2s var(--ease),
        background 0.2s var(--ease);
}
.copy-btn:hover {
    color: var(--ink);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.copy-btn.copied {
    color: var(--accent-ink);
}

/* ---- Security note (get started) ---------------------------------------- */
.note {
    margin: 1.8rem auto 0;
    text-align: left;
    background: var(--mono-fill);
    border: 1px solid var(--hairline);
    padding: clamp(1rem, 3vw, 1.4rem);
}
.note-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--copper);
    margin: 0 0 0.5rem;
}
.note-text {
    color: var(--ink-soft);
    font-size: 0.96rem;
    line-height: 1.55;
    margin: 0;
}

/* ---- Footer --------------------------------------------------------------- */
.site-foot {
    padding: 3rem var(--gutter) 4rem;
    text-align: center;
}
.foot-rule {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--copper-soft),
        transparent
    );
    max-width: var(--content-max);
    margin: 0 auto 2rem;
}
.site-foot p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--ink-soft);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}
.site-foot .brand-orb {
    width: 0.5rem;
    height: 0.5rem;
}

/* ---- Motion: scroll reveal ------------------------------------------------ */
.reveal {
    transition:
        opacity 0.7s var(--ease),
        transform 0.7s var(--ease);
}
.js .reveal:not(.is-visible) {
    opacity: 0;
    transform: translateY(20px);
}
/* stagger inner blocks of a scene/plate */
.js .reveal:not(.is-visible) .scene-text > *,
.js .reveal:not(.is-visible) .plate-text > * {
    opacity: 0;
}
.reveal.is-visible .scene-text > *,
.reveal.is-visible .plate-text > * {
    opacity: 1;
    transition: opacity 0.6s var(--ease);
}

/* ---- Anchors clear the sticky nav ----------------------------------------- */
.chapter,
#hero {
    scroll-margin-top: clamp(5rem, 8vh, 6.5rem);
}
#get-started {
    scroll-margin-top: clamp(6rem, 11vh, 8rem);
}

/* ---- Harness rail (cross-harness section) --------------------------------- */
.harness-rail {
    width: min(100%, var(--content-max));
    margin-inline: auto;
    text-align: center;
}
.harness-lead {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 1.5rem;
}
.harness-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(1.6rem, 1rem + 3vw, 3.4rem);
}
.harness {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
}
.harness-mark {
    height: 2rem;
    display: grid;
    place-items: center;
    color: var(--ink);
    transition:
        color 0.25s var(--ease),
        transform 0.25s var(--ease);
}
.harness-mark svg {
    height: 100%;
    width: auto;
    max-width: 2.5rem;
}
.harness:hover .harness-mark {
    color: var(--accent-ink);
    transform: translateY(-2px);
}
.harness-name {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: var(--ink-soft);
}

/* ---- Get-started commands ------------------------------------------------- */
.commands {
    margin-top: 1.9rem;
    display: grid;
    gap: 1.5rem;
    text-align: left;
}
.cmd-label {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    color: var(--copper);
    margin-bottom: 0.55rem;
}
.cmd-note {
    font-size: 0.92rem;
    color: var(--ink-soft);
    margin-top: 0.55rem;
}
.commands .command {
    margin: 0;
    max-width: none;
}

/* ---- npm downloads widget ------------------------------------------------- */
.downloads {
    width: fit-content;
    margin: 1.7rem 0 0;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.5rem 0.95rem;
    border: 1px solid var(--hairline);
}
.downloads .dl-spark {
    width: 150px;
    height: 30px;
    display: block;
    overflow: visible;
}
.dl-line {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    stroke-linejoin: round;
    stroke-linecap: round;
}
.dl-area {
    fill: color-mix(in srgb, var(--accent) 14%, transparent);
    stroke: none;
}
.dl-dot {
    fill: var(--accent);
    filter: drop-shadow(
        0 0 4px color-mix(in srgb, var(--accent) 70%, transparent)
    );
}
.downloads figcaption {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--ink-soft);
}
.downloads .dl-num {
    color: var(--ink);
    font-weight: 500;
}

/* ---- Responsive ----------------------------------------------------------- */
@media (max-width: 860px) {
    .nav-links {
        display: none;
    }
    .scene {
        grid-template-columns: 1fr;
        gap: clamp(1.5rem, 5vw, 2.5rem);
    }
    .scene-figure,
    .scene--reverse .scene-figure {
        order: 0;
    }
    .scene-text,
    .scene--reverse .scene-text {
        order: 1;
        max-width: var(--measure);
    }
    .hero-img {
        object-position: 68% center;
    }
    .site-nav {
        background: color-mix(in srgb, var(--paper-body) 93%, transparent);
    }
    .hero-scrim {
        background:
            linear-gradient(
                to bottom,
                rgba(var(--scrim), 0.94) 0%,
                rgba(var(--scrim), 0) 20%
            ),
            linear-gradient(
                to top,
                rgba(var(--scrim), 0.98) 0%,
                rgba(var(--scrim), 0.9) 40%,
                rgba(var(--scrim), 0.32) 68%,
                rgba(var(--scrim), 0) 100%
            );
    }
    .hero-inner {
        align-self: end;
    }
    .scroll-cue {
        display: none;
    }
    .flow-track {
        flex-direction: column;
        gap: 0;
    }
    .flow-stage {
        border-top: none;
        border-left: 2px solid var(--copper-soft);
        padding: 1rem 1.1rem;
    }
    .flow-stage--curator {
        border-left-color: var(--accent);
        background: linear-gradient(90deg, var(--mono-fill), transparent 70%);
    }
    .flow-link {
        flex-basis: 1.4rem;
        width: 1px;
        height: 1.4rem;
        background: var(--copper-soft);
        margin-left: calc(1.1rem - 0.5px);
        align-self: flex-start;
    }
    .flow-link::after {
        right: auto;
        left: 50%;
        top: auto;
        bottom: -1px;
        transform: translateX(-50%);
        border-left: 4px solid transparent;
        border-right: 4px solid transparent;
        border-top: 6px solid var(--copper);
        border-bottom: none;
    }
    .verb {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }
    .verb dt {
        color: var(--accent-ink);
    }
}

@media (max-width: 520px) {
    .command {
        flex-direction: column;
    }
    .copy-btn {
        border-left: none;
        border-top: 1px solid var(--hairline-strong);
        padding: 0.6rem;
        justify-content: center;
    }
}

/* Keep "Get started" persistent on phones (G3); reclaim room from the wordmark. */
@media (max-width: 400px) {
    .brand-name {
        display: none;
    }
    .nav-actions {
        gap: 0.5rem;
    }
    .btn-sm {
        padding: 0.55em 0.85em;
        font-size: 0.78rem;
    }
}

/* Large screens / 4K: use the space, keep the measure readable. */
@media (min-width: 1800px) {
    :root {
        --content-max: 1340px;
        --measure: 66ch;
        --fs-hero: 5.5rem;
        --fs-h2: 3.15rem;
        --fs-lede: 1.6rem;
        --section-y: clamp(4.5rem, 5vw, 7rem);
    }
    .hero {
        min-height: min(90vh, 1040px);
    }
    .hero-inner {
        max-width: 46rem;
    }
}

/* ---- Lightbox ------------------------------------------------------------- */
.slide img {
    cursor: zoom-in;
}
.lightbox {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    max-width: 100vw;
    max-height: 100dvh;
    margin: 0;
    padding: 0;
    border: 0;
    overflow: hidden;
    background: rgba(12, 10, 8, 0.96);
    color: #f3ecdd;
}
.lightbox:not([open]) {
    display: none;
}
.lightbox::backdrop {
    background: rgba(12, 10, 8, 0.7);
}
.lb-figure {
    margin: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.lb-stage {
    flex: 1 1 auto;
    min-height: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: none;
    padding: clamp(3rem, 8vh, 5rem) clamp(0.75rem, 6vw, 5.5rem) 0.5rem;
}
.lb-img {
    max-width: 100%;
    max-height: 100%;
    transform-origin: center center;
    will-change: transform;
    user-select: none;
    -webkit-user-drag: none;
    cursor: zoom-in;
}
.lb-img.zoomed {
    cursor: grab;
}
.lb-cap {
    flex: 0 0 auto;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #cfc4ad;
    padding: 0.85rem 1.5rem 0.4rem;
}
.lb-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.05rem;
}
.lb-count {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #cfc4ad;
}
.lb-close,
.lb-nav {
    display: grid;
    place-items: center;
    background: rgba(243, 236, 221, 0.08);
    border: 1px solid rgba(243, 236, 221, 0.24);
    color: #f3ecdd;
    cursor: pointer;
    transition:
        background 0.2s var(--ease),
        border-color 0.2s var(--ease),
        opacity 0.2s var(--ease);
}
.lb-close {
    width: 2.6rem;
    height: 2.6rem;
}
.lb-close:hover,
.lb-nav:hover {
    background: rgba(243, 236, 221, 0.16);
    border-color: rgba(243, 236, 221, 0.55);
}
.lb-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 3rem;
    height: 3rem;
}
.lb-prev {
    left: clamp(0.5rem, 2vw, 1.5rem);
}
.lb-next {
    right: clamp(0.5rem, 2vw, 1.5rem);
}
.lb-hint {
    position: absolute;
    bottom: 0.7rem;
    left: 0;
    right: 0;
    z-index: 3;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(243, 236, 221, 0.5);
    pointer-events: none;
    padding: 0 1rem;
}
@media (max-width: 560px) {
    .lb-hint {
        display: none;
    }
    .lb-nav {
        width: 2.6rem;
        height: 2.6rem;
    }
}

/* ---- Reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    html:focus-within {
        scroll-behavior: auto;
    }
    .js .reveal:not(.is-visible) {
        opacity: 1;
        transform: none;
    }
    .js .reveal:not(.is-visible) .scene-text > *,
    .js .reveal:not(.is-visible) .plate-text > * {
        opacity: 1;
    }
    .scroll-cue {
        display: none;
    }
}