/* Console theme: --ink is foreground, --paper is the machine substrate. */
:root {
    --ink: #dfe6e9;
    --paper: #07090b;
    --panel: #0c1013;
    --panel-hi: #171c1e;
    --muted: #a5afb3;
    --signal: #ff4d3d;
    --cyan: #45e6d4;
    --cyan-text: #45e6d4;
    --yellow: #ffb020;
    --line: #303638;
    --line-hi: #536064;
    /* Avenir Next is macOS-only and fell back to Trebuchet MS everywhere else;
       Courier New carried the chrome. Both dated the product regardless of the
       layout around them. These two stacks match app/portal/src/style.mjs so
       signing in does not change typeface, and both resolve locally -- a
       webfont here would be a request that can fail and a reflow when it does. */
    --sans: "Segoe UI", "Helvetica Neue", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    --max: 1220px;
}

* {
    box-sizing: border-box;
    letter-spacing: 0;
}

html {
    color-scheme: dark;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background-color: var(--paper);
    background-image:
        linear-gradient(rgba(165, 175, 179, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(165, 175, 179, 0.025) 1px, transparent 1px);
    background-size: 64px 64px;
    font-family: var(--sans);
    font-size: 18px;
    line-height: 1.65;
    overflow-wrap: anywhere;
    -webkit-font-smoothing: antialiased;
}

@keyframes boot-in {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
}

@keyframes led-pulse {
    0%, 45% {
        opacity: 1;
        box-shadow: 0 0 10px var(--cyan);
    }
    55%, 100% {
        opacity: 0.28;
        box-shadow: none;
    }
}

.site-header,
.status-strip,
.command-copy {
    animation: boot-in 560ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.status-strip { animation-delay: 110ms; }
.command-copy { animation-delay: 210ms; }

a {
    color: inherit;
    text-decoration-thickness: 2px;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--cyan);
}

a:focus-visible,
summary:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    z-index: 30;
    top: 12px;
    left: 12px;
    padding: 12px 16px;
    color: var(--paper);
    background: var(--cyan);
    font-family: var(--sans);
    font-weight: 700;
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: none;
}

.site-header {
    position: relative;
    z-index: 10;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    border-top: 3px solid var(--signal);
}

.header-inner,
.shell {
    width: min(calc(100% - 40px), var(--max));
    margin-inline: auto;
}

.header-inner {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    font-family: var(--sans);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0;
    text-decoration: none;
}

.wordmark::before {
    content: "";
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    background-image: url("/assets/cyberdyne-mark.svg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    filter: drop-shadow(0 0 7px rgba(255, 77, 61, 0.5));
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 22px;
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 700;
}

.site-nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    text-decoration: none;
}

.site-nav a::before {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: 0;
    height: 2px;
    background: var(--cyan);
    transition: right 180ms ease;
}

.site-nav a:hover::before,
.site-nav a:focus-visible::before {
    right: 0;
}

.site-nav a[aria-current="page"] {
    color: var(--signal);
}

.site-nav a[aria-current="page"]::before {
    right: 0;
    background: var(--signal);
}

.status-strip {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 22px;
    width: min(calc(100% - 40px), var(--max));
    margin-inline: auto;
    padding-block: 9px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-family: var(--sans);
    font-size: 11px;
    letter-spacing: 0;
    text-transform: none;
}

.ok {
    color: var(--cyan-text);
}

.led {
    width: 8px;
    height: 8px;
    flex: none;
    border-radius: 50%;
    background: var(--cyan);
    animation: led-pulse 2.4s steps(1, end) 2;
}

.hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: var(--paper);
}

.hero-art {
    position: absolute;
    z-index: -2;
    top: 0;
    left: 50%;
    width: max(100%, 1180px);
    height: 100%;
    transform: translateX(-50%);
    object-fit: contain;
    object-position: center;
}

.hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    top: 5%;
    left: 54%;
    width: 30%;
    height: 1px;
    background: var(--signal);
    box-shadow: 0 0 12px var(--signal);
    opacity: 0;
    animation: optical-scan 3.6s ease-out 600ms;
    pointer-events: none;
}

@keyframes optical-scan {
    15%, 70% { opacity: 0.65; }
    100% { top: 87%; opacity: 0; }
}

.command-content {
    min-height: 510px;
    display: flex;
    align-items: center;
    padding-block: 42px;
}

.command-copy {
    max-width: 580px;
}

.hero h1 {
    font-size: 88px;
    line-height: 1.3;
    margin-bottom: 26px;
    color: #f2f5f5;
    text-shadow: none;
}

.hero h1 span {
    display: block;
    margin-top: 12px;
    font-size: 32px;
    line-height: 1.3;
    color: var(--muted);
}

.hero-directive {
    margin: 0 0 12px;
    font-size: 24px;
    font-weight: 600;
}

.hero .lede {
    max-width: 44ch;
    margin: 0;
    color: var(--muted);
    font-size: 18px;
}

.command-rail {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 24px;
    padding-block: 16px;
    border-top: 1px solid var(--line);
    font-family: var(--sans);
    font-size: 11px;
    text-transform: none;
    color: var(--muted);
}

.eyebrow,
.kicker,
.meta,
.label {
    margin: 0 0 13px;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: none;
}

.eyebrow {
    color: var(--signal);
}

.kicker {
    color: var(--cyan-text);
}

/* Titles stay in Title Case: no text-transform here. */
h1,
h2,
h3 {
    margin-top: 0;
    font-family: var(--sans);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0;
}

h1 {
    max-width: 16ch;
    margin-bottom: 24px;
    font-size: 64px;
}

h2 {
    font-size: 34px;
}

h3 {
    font-size: 22px;
}

.lede {
    max-width: 58ch;
    font-size: 21px;
    line-height: 1.5;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    padding: 12px 18px;
    border: 1px solid var(--line-hi);
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: border-color 160ms linear, color 160ms linear, box-shadow 160ms linear;
}

.button:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 24px rgba(69, 230, 212, 0.22);
}

.button--primary {
    color: var(--paper);
    background: var(--signal);
    border-color: var(--signal);
}

.button--primary:hover {
    color: var(--paper);
    background: #ff6b5c;
    border-color: #ff6b5c;
    box-shadow: 0 0 28px rgba(255, 77, 61, 0.4);
}

.band {
    border-block: 1px solid var(--line);
    background:
        linear-gradient(rgba(165, 175, 179, 0.035) 1px, transparent 1px) 0 0 / 100% 34px,
        var(--panel);
}

.band .shell {
    padding-block: 34px 42px;
}

.path-list,
.lesson-grid,
.term-grid,
.tip-list {
    display: grid;
    gap: 1px;
    margin: 34px 0 0;
    padding: 0;
    list-style: none;
    border: 1px solid var(--line);
    background: var(--line);
}

.path-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.path-list li {
    min-height: 216px;
    padding: 24px;
    background: var(--paper);
}

.path-list li,
.lesson-grid article,
.term-grid article,
.tip-list article {
    position: relative;
    transition: background 200ms linear;
}

.path-list li::after,
.lesson-grid article::after,
.tip-list article::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--cyan);
    transition: width 260ms cubic-bezier(0.16, 1, 0.3, 1);
}

.path-list li:hover,
.path-list li:focus-within,
.lesson-grid article:hover,
.lesson-grid article:focus-within,
.term-grid article:hover,
.tip-list article:hover {
    background: var(--panel-hi);
}

.path-list li:hover::after,
.path-list li:focus-within::after,
.lesson-grid article:hover::after,
.lesson-grid article:focus-within::after,
.tip-list article:hover::after {
    width: 100%;
}

.path-list a,
.lesson-grid a {
    display: block;
    font-family: var(--sans);
    font-size: 20px;
    font-weight: 700;
}

.section {
    padding-block: 60px;
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(0, 0.7fr) minmax(280px, 1.3fr);
    gap: 48px;
    align-items: end;
}

.section-heading p {
    max-width: 58ch;
    margin: 0;
    color: var(--muted);
}

.lesson-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.lesson-grid article {
    min-height: 210px;
    padding: 26px;
    background: var(--paper);
}

.status {
    color: var(--cyan-text);
}

.principle {
    max-width: 32ch;
    border-left: 3px solid var(--signal);
    padding: 4px 0 4px 24px;
    font-family: var(--sans);
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    text-shadow: 0 0 26px rgba(255, 77, 61, 0.24);
}

.page-intro {
    position: relative;
    padding-block: 48px 40px;
    border-bottom: 1px solid var(--line);
    border-left: 4px solid var(--signal);
    background: var(--paper) url("/assets/machine-core.webp") right center / 950px auto no-repeat;
}

.page-intro .shell {
    padding-right: 26%;
}

.page-intro h1 {
    max-width: 22ch;
    font-size: 48px;
    line-height: 1.3;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    padding-block: 56px 84px;
}

.article-nav {
    align-self: start;
    position: sticky;
    top: 24px;
    padding-top: 12px;
    border-top: 2px solid var(--signal);
    color: var(--muted);
    font-family: var(--sans);
    font-size: 13px;
    border-left: 1px solid var(--line);
    padding-left: 18px;
}

.article-nav a {
    display: flex;
    align-items: center;
    min-height: 44px;
    margin-block: 2px;
}

.prose {
    max-width: 68ch;
}

.prose :is(h2, .exercise),
#curriculum {
    scroll-margin-top: 24px;
}

.prose li + li {
    margin-top: 10px;
}

.section-intro {
    max-width: 64ch;
    color: var(--muted);
}

.back-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    margin-bottom: 16px;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 14px;
}

.lesson-outcome {
    max-width: 62ch;
    margin: 24px 0 0;
    padding-left: 18px;
    border-left: 2px solid var(--cyan);
    font-size: 16px;
    color: var(--muted);
}

.lesson-outcome strong {
    display: block;
    margin-bottom: 4px;
    color: var(--ink);
}

.lesson-pagination {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    margin-top: 48px;
    padding-top: 28px;
    border-top: 1px solid var(--line-hi);
}

.lesson-pagination a {
    display: block;
    padding: 18px;
    border: 1px solid var(--line);
    font-size: 16px;
    font-weight: 600;
}

.lesson-pagination a:last-child {
    border-color: var(--cyan);
}

.lesson-pagination .meta {
    display: block;
    margin-bottom: 8px;
    font-size: 11px;
}

.lesson-companion {
    border-top: 1px solid var(--line);
}

.lesson-companion p {
    max-width: 64ch;
    color: var(--muted);
}

.document-layout {
    padding-block: 48px 72px;
}

.document-layout .prose {
    margin-inline: auto;
}

.prose h2 {
    margin-top: 56px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.prose h2:first-child {
    margin-top: 0;
}

.callout,
.exercise {
    margin-block: 34px;
    padding: 24px;
    border-block: 1px solid var(--line);
    border-left: 3px solid var(--yellow);
    background: var(--panel);
}

.callout .label {
    color: var(--yellow);
}

.exercise {
    border-left-color: var(--cyan);
}

.exercise .label {
    color: var(--cyan-text);
}

.callout > :last-child,
.exercise > :last-child {
    margin-bottom: 0;
}

code {
    padding: 0.14em 0.4em;
    border: 1px solid var(--line-hi);
    background: var(--panel-hi);
    color: var(--cyan-text);
    font-family: var(--sans);
    font-size: 0.86em;
}

.tip-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tip-list article,
.term-grid article {
    padding: 26px;
    background: var(--paper);
}

.tip-list h2,
.term-grid h2,
.tip-list h3,
.term-grid h3 {
    margin-bottom: 10px;
    font-size: 19px;
    line-height: 1.45;
}

.jump-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 700;
}

.jump-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    text-decoration-color: var(--line-hi);
}

.jump-nav a:hover {
    text-decoration-color: var(--cyan);
}

.glossary-search {
    max-width: 560px;
    margin-top: 26px;
}

.glossary-search label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 700;
}

.glossary-search input {
    width: 100%;
    min-height: 52px;
    padding: 12px 16px;
    border: 1px solid var(--line-hi);
    background: var(--panel);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
}

.site-nav .nav-enrol{
    color:var(--paper);background:var(--cyan);
    padding:.35rem .85rem;border-radius:0;
}
.site-nav .nav-enrol:hover,.site-nav .nav-enrol:focus-visible{
    background:var(--ink);color:var(--paper);
}
.glossary-search input::placeholder {

    color: var(--muted);
}

.glossary-search input:focus-visible {
    border-color: var(--cyan);
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
}

.glossary-search p {
    margin: 10px 0 0;
    color: var(--muted);
    font-family: var(--sans);
    font-size: 13px;
}

mark {
    padding: 0 2px;
    background: var(--cyan);
    color: var(--paper);
}

.tip-list p,
.term-grid p,
.path-list p,
.lesson-grid p {
    color: var(--muted);
    font-size: 16px;
}

.term-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.site-footer {
    padding-block: 34px;
    border-top: 1px solid var(--line);
    background: var(--panel);
    color: var(--muted);
    font-family: var(--sans);
    font-size: 12px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.reveal {
    opacity: 1;
}

.reveal.is-visible {
    animation: content-arrive 500ms ease;
}

@keyframes content-arrive {
    from { transform: translateY(10px); }
}

@media (max-width: 1000px) {
    .path-list,
    .lesson-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .command-copy {
        max-width: 500px;
    }

    .hero-art {
        left: 56%;
    }

    .page-intro {
        background-position: right -150px center;
    }

    .page-intro .shell {
        padding-right: 18%;
    }
}

@media (max-width: 800px) {
    body {
        font-size: 17px;
    }

    .header-inner,
    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
        padding-block: 18px;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .status-strip {
        font-size: 10px;
        letter-spacing: 0;
    }

    .section-heading,
    .article-layout {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 68px;
    }

    .hero-art {
        left: 64%;
        opacity: 0.42;
    }

    .page-intro {
        background-image: none;
    }

    .page-intro .shell {
        padding-right: 0;
    }

    .page-intro h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
    }

    .path-list,
    .lesson-grid,
    .tip-list,
    .term-grid {
        grid-template-columns: 1fr;
    }

    .path-list li,
    .lesson-grid article,
    .tip-list article,
    .term-grid article {
        min-height: auto;
    }

    .article-nav {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 0 20px;
    }

    .article-nav strong { flex-basis: 100%; }

    .principle {
        max-width: none;
        font-size: 26px;
    }
}

@media (max-width: 540px) {
    .lesson-pagination { grid-template-columns: 1fr; }

    .article-layout { padding-block: 32px 48px; }

    .document-layout { padding-block: 32px 48px; }

    .header-inner {
        gap: 10px;
        padding-block: 12px;
    }

    .site-nav {
        gap: 0 17px;
        font-size: 12px;
    }

    .status-strip {
        gap: 6px 12px;
    }

    .status-strip > :last-child {
        display: none;
    }

    .command-content {
        min-height: 470px;
        padding-block: 68px 26px;
    }

    .command-copy {
        width: 100%;
    }

    .hero-art {
        top: -75px;
        left: auto;
        right: -70px;
        width: 560px;
        height: 299px;
        opacity: 1;
        transform: none;
    }

    .hero::after {
        left: 50%;
        animation-name: none;
    }

    .hero .eyebrow {
        max-width: 16ch;
        font-size: 10px;
    }

    .hero h1 {
        font-size: 60px;
        margin-bottom: 20px;
    }

    .hero h1 span {
        font-size: 23px;
        margin-top: 5px;
    }

    .hero-directive {
        font-size: 17px;
    }

    .hero .lede {
        font-size: 16px;
    }

    .actions {
        margin-top: 22px;
        gap: 9px;
    }

    .hero .button {
        width: 100%;
        min-height: 46px;
    }

    .hero .button:not(.button--primary) {
        min-height: 40px;
        padding-block: 8px;
    }

    .command-rail {
        font-size: 10px;
    }

    .command-rail > :nth-child(2) {
        display: none;
    }

    .band .shell,
    .section {
        padding-block: 28px;
    }
}

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

    *,
    *::before,
    *::after {
        animation: none !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .site-header,
    .status-strip,
    .command-copy {
        opacity: 1;
        transform: none;
    }

    .led {
        opacity: 1;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* The companion is a distinct learning workflow, not a second lesson index. */
.companion-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 32px;
}
.companion-grid article {
    padding: 26px;
    border: 1px solid var(--line);
    border-top: 2px solid var(--cyan);
    border-radius: 0 0 12px 12px;
    background: var(--panel);
}
.companion-grid h3 { font-size: 21px; line-height: 1.3; }
.companion-grid p:last-child { margin-bottom: 0; color: var(--muted); font-size: 16px; }
.companion-invite {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    margin-top: 24px;
    padding: 26px;
    border: 1px solid var(--line-hi);
    border-radius: 12px;
    background: var(--paper);
}
.companion-invite h3 { font-size: 20px; line-height: 1.3; }
.companion-invite p { max-width: 60ch; margin: 0; font-size: 16px; color: var(--muted); }
.companion-invite .button { flex-shrink: 0; }
@media (max-width: 800px) {
    .companion-grid { grid-template-columns: 1fr; }
    .companion-invite { align-items: flex-start; flex-direction: column; }
}

.footer-links{display:flex;gap:24px;flex-wrap:wrap;margin-top:20px;font-family:var(--sans);font-size:14px}
.footer-links a{display:inline-flex;align-items:center;min-height:44px}
.agent-note{margin-top:12px;font-family:var(--mono);font-size:12px;letter-spacing:.02em;color:var(--muted)}
.agent-note a{color:var(--cyan-text);text-underline-offset:3px}

/* Calm editorial typography; monospace is reserved for literal code. */
code, pre, kbd, samp { font-family: var(--mono); }
h1, h2, h3 { font-weight: 600; letter-spacing: -.025em; line-height: 1.35; }
.site-nav, .wordmark { font-weight: 600; }
.eyebrow, .kicker, .meta, .label { font-size: 14px; font-weight: 500; }
.prose { line-height: 1.8; }

.reading-controls{padding-block:1.25rem;font-family:var(--sans);font-size:16px}
.reading-controls summary{cursor:pointer;min-height:44px;padding-block:.65rem;color:var(--cyan-text)}
.reading-controls form{max-width:42rem;padding:1.25rem;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.reading-controls label{display:block;margin:.75rem 0 .35rem}
.reading-controls select,.reading-controls button{font:inherit;min-height:44px;padding:.65rem 1rem;background:var(--panel);color:var(--ink);border:1px solid var(--line-hi);border-radius:8px;max-width:100%}
.reading-controls button{display:block;margin-top:1rem;color:var(--cyan-text)}
.reading-controls :is(select,button):focus-visible{outline:2px solid var(--cyan-text);outline-offset:3px}
body.reading-light{color-scheme:light;--paper:#f6f7f9;--panel:#fff;--panel-hi:#e8edf0;--ink:#172b34;--muted:#465862;--line:#bac8ce;--line-hi:#667b86;--cyan:#006b62;--cyan-text:#006b62;--signal:#b52c24;--yellow:#805600}
:is(.reading-light,.reading-prism) .button--primary{color:#fff}
.reading-large .prose p,.reading-large .prose li,.reading-large .lede,.reading-large .card p,.reading-large .term-grid p{font-size:1.2em;line-height:1.8}

/* The artwork is dark in either reading theme; keep its overlaid copy legible. */
:is(.reading-light,.reading-prism) .hero{color:var(--ink);--paper:#07090b;--panel:#0c1013;--panel-hi:#171c1e;--ink:#dfe6e9;--muted:#a5afb3;--line:#303638;--line-hi:#536064;--cyan:#45e6d4;--cyan-text:#45e6d4;--signal:#ff4d3d}
:is(.reading-light,.reading-prism) .hero .button--primary{color:var(--paper)}

/* Match portal controls while keeping the native select's keyboard semantics. */
.reading-controls select{display:block;width:100%;min-height:48px;appearance:none;padding-inline-end:3rem;line-height:1.5;
 background-image:linear-gradient(45deg,transparent 43%,var(--muted) 43% 57%,transparent 57%),linear-gradient(135deg,transparent 43%,var(--muted) 43% 57%,transparent 57%);
 background-position:calc(100% - 1.5rem) center,calc(100% - 1rem) center;background-size:.5rem .5rem;background-repeat:no-repeat}
.reading-controls select:hover{border-color:var(--cyan-text)}
.reading-controls option{color:var(--ink);background:var(--panel)}
.reading-controls label:first-child{margin-top:0}
@media (forced-colors:active){.reading-controls select{appearance:auto;background-image:none;padding-inline-end:1rem}}

/* Opt-in palettes: retain the shared layout, typography, and brand artwork. */
body.reading-accessible{color-scheme:dark;--paper:#080a0c;--panel:#101418;--panel-hi:#1b232b;--ink:#ffffff;--muted:#d0d9e2;--line:#8093a3;--line-hi:#b4c4d2;--cyan:#82c5ff;--signal:#ffd875;--yellow:#ffd875;--green:#82c5ff;--cyan-text:#82c5ff;background-image:none}
body.reading-matrix{color-scheme:dark;--paper:#050a07;--panel:#0c1710;--panel-hi:#172a1d;--ink:#e4f5e8;--muted:#b1c6b7;--line:#3e5845;--line-hi:#718e78;--cyan:#7cf2a2;--signal:#ffb38c;--yellow:#ecd483;--green:#7cf2a2;--cyan-text:#7cf2a2;background-image:none}
body.reading-ocean{color-scheme:dark;--paper:#08131e;--panel:#0e2030;--panel-hi:#193348;--ink:#e7f3ff;--muted:#b1c7da;--line:#3f5c72;--line-hi:#718fa6;--cyan:#79cfff;--signal:#ffa99e;--yellow:#f5d188;--green:#8ee0ba;--cyan-text:#79cfff;background-image:none}
body.reading-aurora{color-scheme:dark;--paper:#140e21;--panel:#211830;--panel-hi:#332644;--ink:#f3eafa;--muted:#c9b9dc;--line:#615072;--line-hi:#9981ac;--cyan:#d0adff;--signal:#ffb0c4;--yellow:#f5d38b;--green:#9cdec9;--cyan-text:#d0adff;background-image:none}
body.reading-sunset{color-scheme:dark;--paper:#1c1115;--panel:#2b1b21;--panel-hi:#402b33;--ink:#fff0e8;--muted:#d9beb7;--line:#76565b;--line-hi:#ae8589;--cyan:#ffbd96;--signal:#ffabb6;--yellow:#f8d38b;--green:#a7dfbf;--cyan-text:#ffbd96;background-image:none}
body.reading-accessible a{text-decoration:underline;text-underline-offset:.2em}
body.reading-accessible :is(a,button,input,select,textarea,summary):focus-visible{outline:3px solid var(--yellow);outline-offset:4px}

/* Prism: a bright, multicolor workspace with dark reading text. */
body.reading-prism{color-scheme:light;--paper:#faf7ff;--panel:#fff;--panel-hi:#e7ddf6;--ink:#28193f;--muted:#51466a;--line:#cec3e6;--line-hi:#84749d;--cyan:#6333bf;--cyan-text:#6333bf;--signal:#a72766;--yellow:#765100;--green:#116747;--prism-lilac:#eee5ff;--prism-rose:#ffe7ef;--prism-mint:#dbf5ed;--prism-sky:#e0efff;background-image:none}
.reading-prism :is(.path-list > li,.companion-grid > article,.lesson-grid > article,.term-grid > article,.tip-list > article){--tile-surface:var(--prism-lilac);--tile-accent:#6333bf;background:var(--tile-surface);border-top:4px solid var(--tile-accent)}
.reading-prism :is(.path-list > li,.companion-grid > article,.lesson-grid > article,.term-grid > article,.tip-list > article):nth-child(4n+2){--tile-surface:var(--prism-rose);--tile-accent:#a72766}
.reading-prism :is(.path-list > li,.companion-grid > article,.lesson-grid > article,.term-grid > article,.tip-list > article):nth-child(4n+3){--tile-surface:var(--prism-mint);--tile-accent:#116747}
.reading-prism :is(.path-list > li,.companion-grid > article,.lesson-grid > article,.term-grid > article,.tip-list > article):nth-child(4n){--tile-surface:var(--prism-sky);--tile-accent:#195bb5}

.reading-prism .button--primary:hover{background:var(--ink);border-color:var(--ink)}