:root {
    --ink: #12211f;
    --muted: #596965;
    --paper: #fcfbf7;
    --soft: #eaf0eb;
    --line: #d7e0d9;
    --forest: #0c4b3c;
    --leaf: #9bd66f;
    --orange: #ef9e4f;
    --surface: #ffffff;
    --on-accent: #ffffff;
    --on-primary: #ffffff;
    --on-leaf: #12211f;
    --accent-bg: #0c4b3c;
    --header-bg: rgb(252 251 247 / 94%);
    --header-line: rgb(215 224 217 / 80%);
    --fine-print: rgb(255 255 255 / 78%);
    --caution: #8d4a0e;
    --hero-start: #f8fbf5;
    --hero-end: #e3f1df;
    --review-bg: #fff0dc;
    --radius: 1.25rem;
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    color: var(--ink);
    background: var(--paper);
}

:root[data-theme="dark"] {
    --ink: #e7f0ec;
    --muted: #b4c4bd;
    --paper: #101916;
    --soft: #17261f;
    --line: #2c4037;
    --forest: #8ed0ae;
    --leaf: #c3ea85;
    --orange: #f5bb78;
    --surface: #18231f;
    --on-accent: #e7f0ec;
    --on-primary: #10231a;
    --on-leaf: #18231f;
    --accent-bg: #203b2e;
    --header-bg: rgb(16 25 22 / 96%);
    --header-line: rgb(231 240 236 / 16%);
    --fine-print: rgb(231 240 236 / 78%);
    --caution: #f5bb78;
    --hero-start: #12231c;
    --hero-end: #1d3529;
    --review-bg: #3a2d20;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); line-height: 1.75; }
a { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: clamp(2.5rem, 7vw, 5rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); }
h3 { font-size: 1.25rem; }

.shell { width: min(1120px, calc(100% - 2.5rem)); margin-inline: auto; }
.narrow { width: min(760px, 100%); }
.site-header { position: sticky; top: 0; z-index: 10; background: var(--header-bg); border-bottom: 1px solid var(--header-line); backdrop-filter: blur(12px); }
.navigation { display: flex; align-items: center; justify-content: space-between; min-height: 4.75rem; gap: 1rem; }
.site-controls { display: flex; align-items: center; gap: .75rem; }
.language-link, .theme-toggle { color: var(--forest); background: transparent; border: 1px solid var(--line); border-radius: 999px; font: inherit; font-size: .9rem; font-weight: 800; line-height: 1; text-decoration: none; }
.language-link { padding: .55rem .8rem; }
.theme-toggle { display: grid; place-items: center; width: 2.35rem; height: 2.35rem; cursor: pointer; }
.language-link:hover, .theme-toggle:hover { color: var(--on-accent); background: var(--accent-bg); border-color: var(--accent-bg); }
.brand { display: flex; flex-direction: column; align-items: flex-start; gap: .1rem; color: var(--forest); font-size: 1.2rem; font-weight: 800; line-height: 1.4; text-decoration: none; }
.brand span { color: var(--muted); font-size: .77rem; font-weight: 700; }
nav { display: flex; gap: 1.25rem; }
nav a { color: var(--muted); font-size: .95rem; font-weight: 700; text-decoration: none; }
nav a:hover { color: var(--forest); }

.hero { padding: clamp(4rem, 10vw, 8rem) 0; background: linear-gradient(135deg, var(--hero-start) 0%, var(--hero-end) 100%); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); align-items: center; gap: clamp(2rem, 7vw, 7rem); }
.eyebrow, .card-label, .stage-number { color: var(--forest); font-size: .8rem; font-weight: 800; letter-spacing: .07em; }
.eyebrow { margin-bottom: 1rem; }
.hero h1 { max-width: 20ch; margin-bottom: 1.25rem; font-size: clamp(2.4rem, 5vw, 4rem); }
.hero h1 span { color: var(--forest); }
.hero-grid > div > p:not(.eyebrow) { max-width: 58ch; color: var(--muted); font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.home-page .hero { padding-block: clamp(2.5rem, 5vw, 4rem); }
.home-page .hero-grid { gap: clamp(1.5rem, 5vw, 4rem); }
.home-page .hero h1 { max-width: 21ch; font-size: clamp(2.25rem, 4vw, 3.5rem); }
.home-page .section { padding-block: clamp(2rem, 4vw, 3.5rem); }
.home-page .section-heading { margin-bottom: 1.5rem; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: .4rem; border-radius: 999px; padding: .75rem 1.2rem; font-weight: 800; text-decoration: none; transition: transform .15s ease, box-shadow .15s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--on-primary); background: var(--forest); box-shadow: 0 8px 18px rgb(12 75 60 / 18%); }
.button-secondary { color: var(--forest); border: 1px solid var(--forest); }
.hero-card { padding: 1.8rem; color: var(--on-accent); background: var(--accent-bg); border-radius: var(--radius); box-shadow: 18px 22px 0 var(--leaf); }
.hero-card h2 { margin-bottom: 1.4rem; font-size: 1.5rem; direction: ltr; text-align: right; }
html[dir="ltr"] .hero-card h2 { text-align: left; }
.hero-card .card-label { color: var(--leaf); }
.hero-card ol { display: grid; gap: .85rem; padding: 0; margin: 0; list-style: none; }
.hero-card li { display: flex; align-items: center; gap: .75rem; }
.hero-card li span { display: grid; place-items: center; width: 1.7rem; height: 1.7rem; color: var(--on-leaf); background: var(--leaf); border-radius: 50%; font-size: .8rem; font-weight: 900; }

.section { padding-block: clamp(3.5rem, 7vw, 6rem); }
.section-heading { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 2.5rem; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { max-width: 38ch; margin: 0; color: var(--muted); }
.compact { align-items: center; }
.feature-grid, .stage-grid, .path-grid, .course-grid, .methodology-grid { display: grid; gap: 1.25rem; }
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.feature-card, .stage-card, .course-card, .methodology-grid article { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.feature-card { padding: 1.6rem; }
.feature-number { display: block; margin-bottom: 1.5rem; color: var(--orange); font-weight: 900; letter-spacing: .07em; }
.feature-card p, .stage-card p, .course-card p, .methodology-grid p { color: var(--muted); }
.path-preview { border-top: 1px solid var(--line); scroll-margin-top: 6rem; }
.path-preview .section-heading { display: block; }
.path-preview .section-heading > p { max-width: 42rem; margin: .75rem 0 0; }
.path-grid { grid-template-columns: repeat(2, 1fr); }
.path-card { display: flex; flex-direction: column; gap: .75rem; padding: 1.35rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.path-card h3 { max-width: 28ch; margin-bottom: 0; color: var(--forest); font-size: clamp(1.3rem, 2.2vw, 1.6rem); }
.path-card > p { margin-bottom: 0; color: var(--muted); }
.path-card .eyebrow { letter-spacing: 0; }
.path-card .text-link { margin-top: 0; }
.path-reassurance { margin: 1rem 0 0; color: var(--muted); font-size: .9rem; }
.path-reassurance a { color: var(--forest); text-underline-offset: .2rem; }
.path-outcome { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .92rem; }
.stage-grid { grid-template-columns: repeat(5, 1fr); }
.stage-card { display: flex; flex-direction: column; min-height: 250px; padding: 1.3rem; }
.stage-card h3 { min-height: 4rem; }
.stage-card a, .text-link { margin-top: auto; color: var(--forest); font-weight: 800; text-decoration: none; }
.stage-card a span, .text-link span { display: inline-block; transition: transform .15s ease; }
.stage-card a:hover span, .text-link:hover span { transform: translateX(-.25rem); }
.learning-summary { display: flex; align-items: center; gap: 1.5rem; padding-block: 1.25rem; border-block: 1px solid var(--line); }
.learning-summary h2 { flex: 0 0 auto; margin: 0; font-size: 1rem; }
.home-faq-action { margin-top: 1.5rem; }

.page-intro { padding: clamp(3rem, 8vw, 6rem) 0 3.2rem; background: var(--soft); }
.stage-layout { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 2rem; align-items: start; }
.stage-navigation { position: sticky; top: 6rem; padding: 1rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); }
.stage-navigation summary { font-size: .95rem; }
.stage-navigation ol { margin: 1rem 0 0; padding: 0; list-style: none; }
.stage-navigation li + li { margin-top: .5rem; }
.stage-navigation a { display: flex; gap: .5rem; padding: .55rem; border-radius: .5rem; font-size: .85rem; text-decoration: none; color: var(--muted); }
.stage-navigation a[aria-current="step"] { background: var(--soft); color: var(--forest); font-weight: 800; border-inline-start: 3px solid var(--forest); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; color: var(--muted); font-size: .85rem; }
.stage-identity { margin-bottom: 1.5rem; }
.stage-identity p { margin: .5rem 0 0; }
.stage-details { min-width: 0; }
.stage-details .fact-strip { grid-template-columns: 1fr; margin-bottom: 1.5rem; }
.support-material { padding: 1rem; margin-block: 1rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); scroll-margin-top: 6rem; }
.support-material[open] > summary { margin-bottom: 1rem; }
.course-usage + .course-usage { margin-top: 2rem; }
.execution-options { margin-top: 1.5rem; }
.page-intro h1 { margin-bottom: 1rem; color: var(--forest); }
.about-content { max-width: 760px; }
.about-content h2:not(:first-child) { margin-top: 2rem; }
.page-intro > div > p:last-child { max-width: 56ch; color: var(--muted); font-size: 1.1rem; }
.path-facts, .fact-strip { display: grid; gap: 1rem; margin-top: 2rem; }
.path-facts { grid-template-columns: repeat(2, 1fr); }
.path-facts div, .fact-strip > div { padding: 1rem 1.2rem; background: var(--surface); border-radius: .75rem; }
.path-facts span, .fact-strip span { display: block; margin-bottom: .35rem; color: var(--forest); font-size: .8rem; font-weight: 800; }
.timeline { max-width: 880px; }
.timeline-item { display: grid; grid-template-columns: 3.8rem 1fr; column-gap: 1.5rem; position: relative; padding-bottom: 2.5rem; }
.timeline-item:not(:last-child)::before { position: absolute; inset-block: 3.5rem 0; inset-inline-start: 1.75rem; width: 1px; background: var(--line); content: ""; }
.timeline-marker { display: grid; place-items: center; width: 3.5rem; height: 3.5rem; color: var(--on-leaf); background: var(--leaf); border-radius: 50%; font-weight: 900; }
.timeline-content { padding: .25rem 0; }
.timeline-content h2 { margin-bottom: .75rem; }
.timeline-content > p { color: var(--muted); }
.timeline-content dl, .course-summary dl, .course-metadata { display: grid; gap: .6rem; }
.timeline-content dl { grid-template-columns: repeat(2, 1fr); margin: 1.25rem 0; }
dt { color: var(--forest); font-size: .78rem; font-weight: 800; }
dd { margin: .1rem 0 0; color: var(--muted); }
.back-link { color: var(--forest); font-weight: 800; text-decoration: none; }
.fact-strip { grid-template-columns: repeat(3, 1fr); margin: 0 0 3.5rem; }
.course-grid { grid-template-columns: repeat(3, 1fr); }
.course-card { display: flex; flex-direction: column; padding: 1.45rem; }
.course-card-top { display: flex; justify-content: space-between; gap: 1rem; color: var(--forest); font-size: .85rem; font-weight: 800; }
.course-card h3 { min-height: 3.5rem; margin: 1rem 0; }
.course-metadata { margin: 0 0 1rem; padding: 1rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.course-metadata div { display: flex; justify-content: space-between; gap: 1rem; }
.course-metadata dd { text-align: left; }
.course-detail-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); align-items: start; gap: 2rem; }
.assessment-card, .course-summary, .review-note { border-radius: var(--radius); }
.assessment-card { padding: clamp(1.5rem, 4vw, 3rem); background: var(--surface); border: 1px solid var(--line); }
.assessment-card > p:not(.eyebrow) { color: var(--muted); font-size: 1.15rem; }
.assessment-row { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding: 1.2rem 0; border-top: 1px solid var(--line); }
.assessment-row span { font-weight: 800; }
.assessment-row p { margin: 0; color: var(--muted); }
.positive span { color: var(--forest); }
.caution span { color: var(--caution); }
.course-summary { padding: 1.5rem; background: var(--accent-bg); color: var(--on-accent); }
.course-summary dl { margin: 0 0 1.5rem; }
.course-summary dl > div { display: flex; justify-content: space-between; gap: 1rem; padding: .75rem 0; border-bottom: 1px solid rgb(255 255 255 / 18%); }
.course-summary dt, .course-summary dd { color: inherit; }
.course-summary dd { text-align: left; }
.full-width { width: 100%; color: var(--on-leaf); background: var(--leaf); }
.fine-print { margin: 1rem 0 0; color: var(--fine-print); font-size: .83rem; line-height: 1.6; }
.methodology-grid { grid-template-columns: repeat(2, 1fr); }
.methodology-grid article { padding: 1.8rem; }
.review-note { max-width: 760px; padding: clamp(1.5rem, 5vw, 3rem); background: var(--review-bg); }
.review-note p:not(.eyebrow) { max-width: 62ch; color: var(--muted); }
.site-footer { background: var(--paper); }
.footer-content { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding-block: 2rem; border-top: 1px solid var(--line); }
.footer-brand { display: inline-flex; align-items: center; gap: .9rem; color: var(--ink); text-decoration: none; border-radius: .5rem; }
.footer-mark { display: inline-flex; align-items: baseline; justify-content: center; flex-shrink: 0; width: 3.5rem; padding-block: .8rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--soft); color: var(--forest); font-size: .95rem; font-weight: 800; letter-spacing: -.04em; }
.footer-mark-dot { width: .3rem; height: .3rem; margin-inline-start: .12rem; border-radius: 50%; background: var(--forest); }
.footer-identity { display: grid; gap: .15rem; }
.footer-name { font-size: 1.1rem; font-weight: 750; line-height: 1.4; }
.footer-tagline { color: var(--muted); font-size: .85rem; }
.footer-meta { display: grid; gap: .4rem; justify-items: end; }
.footer-links { flex-wrap: wrap; justify-content: flex-end; gap: .25rem 1.5rem; }
.footer-links a { display: inline-flex; align-items: center; min-height: 2.75rem; color: var(--muted); font-size: .85rem; font-weight: 500; text-underline-offset: .3em; }
.footer-links a:hover { color: var(--forest); text-decoration: underline; }
.footer-brand:focus-visible, .footer-links a:focus-visible { outline: 2px solid var(--forest); outline-offset: 4px; }
.footer-brand:hover .footer-name { color: var(--forest); }
.footer-copyright { margin: 0; color: var(--muted); font-size: .75rem; }

html[lang="ar"] h1, html[lang="ar"] h2, html[lang="ar"] h3 { letter-spacing: 0; line-height: 1.5; }
html[lang="ar"] .eyebrow { letter-spacing: 0; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible { outline: 3px solid var(--forest); outline-offset: 4px; }
.project-preview { min-width: 0; margin: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); box-shadow: 0 14px 40px rgb(0 0 0 / 10%); }
.project-preview figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; padding: .8rem 1.2rem; color: var(--forest); font-size: .85rem; font-weight: 700; border-bottom: 1px solid var(--line); }
.project-preview figcaption span { direction: ltr; font-family: Consolas, monospace; }
.project-page { padding: 1.8rem; background: #fff; color: #1d2520; font-family: Georgia, "Times New Roman", serif; }
.project-page h2 { font-size: 1.8rem; margin-bottom: .8rem; }
.project-page h3 { font-size: 1.2rem; margin-bottom: .5rem; }
.project-page ul { padding-inline-start: 1.5rem; }
.preview-link { color: #174baa; text-decoration: underline; margin-bottom: 0; }
.preview-note { padding: 1rem 1.2rem; margin: 0; color: var(--muted); font-size: .85rem; }
.home-browser-preview { width: 100%; max-width: 480px; justify-self: center; }
.home-browser-preview figcaption { padding: .65rem 1rem; background: var(--soft); }
.preview-browser-bar { display: flex; align-items: center; gap: .75rem; padding: .5rem .85rem; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .7rem; direction: ltr; }
.preview-browser-dots { display: flex; gap: .3rem; }
.preview-browser-dots i { width: .4rem; height: .4rem; border-radius: 50%; background: var(--muted); opacity: .65; }
.preview-browser-address { flex: 1; padding: .15rem .6rem; border-radius: .25rem; background: var(--soft); font: .75rem Consolas, monospace; }
.home-browser-preview .project-page { padding: 1.1rem 1.25rem; font-size: .93rem; line-height: 1.55; }
.home-browser-preview .project-page h2 { margin-bottom: .5rem; font-size: 1.5rem; overflow-wrap: anywhere; }
.home-browser-preview .project-page h3 { margin-bottom: .4rem; font-size: 1.05rem; }
.home-browser-preview .project-page p { margin-bottom: .7rem; }
.home-browser-preview .project-page p:last-child { margin-bottom: 0; }
.home-browser-preview .project-page ul { margin-block: .6rem; }
.preview-personalise { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: .6rem; padding: .8rem 1rem .45rem; }
.preview-personalise label { color: var(--forest); font-size: .8rem; font-weight: 700; }
.preview-personalise input { min-width: 0; width: 100%; padding: .4rem .65rem; border: 1px solid var(--line); border-radius: .4rem; color: var(--ink); background: var(--paper); font: inherit; font-size: .9rem; }
.home-browser-preview .preview-note { padding: .2rem 1rem .75rem; font-size: .75rem; }
.learning-cycle { display: flex; flex-wrap: wrap; gap: .5rem .75rem; padding: 0; margin: 0; list-style: none; }
.learning-cycle li { display: flex; align-items: center; gap: .75rem; color: var(--forest); font-size: .95rem; font-weight: 700; }
.learning-cycle .learning-arrow { color: var(--muted); font-weight: 400; }
.beginner-faq { max-width: 850px; border-top: 1px solid var(--line); }
.beginner-faq details { padding-block: 1.2rem; border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 700; color: var(--forest); }
details > p { margin: .8rem 0 0; color: var(--muted); }
.guide-nav { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; padding-block: 1rem; border-block: 1px solid var(--line); }
.guide-nav a { color: var(--forest); font-weight: 700; text-underline-offset: .3rem; }
.guide-block { padding-block: 2.5rem; border-bottom: 1px solid var(--line); scroll-margin-top: 6rem; }
.guide-block > p { max-width: 80ch; }
.csharp-playground { display: block; width: 100%; height: 540px; margin-block: 1.5rem; border: 1px solid var(--line); border-radius: .75rem; background: #ffffff; color-scheme: light; }
.playground-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.5rem; }
.playground-actions button { font: inherit; font-weight: 800; cursor: pointer; }
.playground-actions .button-primary { border: 1px solid var(--forest); }
.playground-actions .button-secondary { background: transparent; }
.web-preview { display: block; width: 100%; height: 320px; border: 1px solid var(--line); border-radius: .75rem; background: #ffffff; color-scheme: light; }
.lesson-steps { max-width: 80ch; padding-inline-start: 1.5rem; }
.lesson-steps li { margin-bottom: .8rem; padding-inline-start: .3rem; }
.example-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 1.5rem; align-items: start; margin-block: 1.5rem; }
.code-example { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--soft); }
.code-example > p { margin: 0; padding: .8rem 1rem; color: var(--forest); font-size: .85rem; font-weight: 700; }
.code-example pre { margin: 0; padding: 1.2rem; overflow-x: auto; text-align: left; line-height: 1.65; font-size: .9rem; color: var(--ink); }
code { font-family: Consolas, "Courier New", monospace; overflow-wrap: anywhere; }
pre code { overflow-wrap: normal; }
.glossary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; margin-block: 1.5rem; }
.glossary div { padding: 1rem; border-inline-start: 3px solid var(--forest); background: var(--soft); }
.glossary dt { font-size: 1rem; }
.lesson-note { padding: 1.2rem; border-inline-start: 3px solid var(--forest); background: var(--soft); }
.readiness-list { display: grid; gap: .8rem; margin-block: 1.5rem; }
.readiness-list label { display: flex; align-items: baseline; gap: .7rem; cursor: pointer; }
.readiness-list input { flex: 0 0 auto; accent-color: var(--forest); width: 1.1rem; height: 1.1rem; }
.source-note { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }
.recommendation-context { grid-column: 1 / -1; margin: 0; padding: 1rem 1.2rem; color: var(--muted); background: var(--soft); border-radius: .75rem; }

.learning-screen { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 2rem; align-items: start; padding-block: 1.75rem 2.5rem; }
.learning-sidebar { position: sticky; top: 6rem; }
.learning-back-link { display: inline-block; margin-bottom: 1rem; color: var(--forest); font-size: .9rem; text-underline-offset: .2rem; }
.lesson-progress { margin-bottom: .75rem; padding: .85rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); }
.lesson-progress p { margin: 0; color: var(--muted); font-size: .8rem; }
.lesson-progress progress { display: block; width: 100%; height: .5rem; margin-block: .55rem; accent-color: var(--forest); }
.lesson-progress .learning-text-button { font-size: .85rem; }
.lesson-progress .lesson-progress-note { margin-top: .45rem; font-size: .72rem; }
.learning-navigation { padding: 1rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); }
.learning-navigation nav { display: block; }
.learning-navigation ol { list-style: none; margin: .75rem 0 0; padding: 0; }
.learning-navigation li + li { margin-top: .3rem; }
.learning-navigation a { display: flex; align-items: baseline; gap: .7rem; padding: .65rem .5rem; border-radius: .4rem; font-size: .9rem; }
.learning-navigation a[aria-current="step"] { color: var(--on-accent); background: var(--accent-bg); }
.learning-number { flex: 0 0 1rem; }
.lesson-complete-indicator { margin-inline-start: auto; color: var(--forest); font-size: .72rem; font-weight: 700; }
.learning-content { min-width: 0; }
.learning-header { margin-bottom: 1.2rem; }
.learning-header .eyebrow { margin-bottom: .5rem; letter-spacing: 0; }
.learning-header h1 { margin-bottom: .65rem; font-size: clamp(1.6rem, 3vw, 2rem); letter-spacing: 0; }
.learning-header p:not(.eyebrow) { max-width: 62ch; margin-bottom: 0; color: var(--muted); }
.learning-screen code[dir="ltr"], .learning-reference-page code[dir="ltr"] { display: inline-block; unicode-bidi: isolate; }
.learning-workspace h2 { font-size: 1rem; margin-bottom: .2rem; color: var(--forest); }
.learning-task { max-width: 62ch; margin-bottom: .85rem; }
.hero-actions [hidden] { display: none; }
.learning-project-note { margin-block: 0 .85rem; }
.learning-project-files { margin-top: .75rem; font-size: .85rem; }
.learning-project-files textarea { margin-block: .4rem .75rem; }
.learning-workspace-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.learning-workspace-panels > div { min-width: 0; }
.learning-code-panel > label, .learning-result-panel > h3 { display: block; margin: 0 0 .5rem; color: var(--muted); font-size: .85rem; font-weight: 700; }
.learning-code-panel textarea { display: block; width: 100%; height: 220px; min-height: 170px; padding: .9rem; border: 1px solid var(--line); border-radius: .6rem; color: var(--ink); background: var(--soft); font: .9rem/1.6 Consolas, "Courier New", monospace; resize: vertical; text-align: left; tab-size: 2; }
.learning-code-panel textarea:focus-visible { outline: 2px solid var(--forest); outline-offset: 2px; }
.learning-workspace .web-preview { height: 220px; border-radius: .6rem; }
[data-learning-lesson="heading-paragraph"] .learning-code-panel textarea, [data-learning-lesson="heading-paragraph"] .web-preview { height: 175px; min-height: 175px; }
[data-learning-lesson="personal-page"] .learning-code-panel textarea, [data-learning-lesson="personal-page"] .web-preview { height: 300px; }
.learning-run-actions { margin-block: .8rem 1rem; align-items: center; }
.learning-run-actions .button { padding: .55rem 1.1rem; font-size: .95rem; }
.learning-text-button { border: 0; background: transparent; padding: 0; color: var(--forest); font: inherit; cursor: pointer; text-decoration: underline; text-underline-offset: .2rem; }
.learning-next { padding-block: 1rem; border-top: 1px solid var(--line); }
.learning-next p { max-width: 62ch; margin-bottom: .7rem; }
.learning-next .button { padding: .6rem 1.1rem; font-size: .95rem; }
.learning-support-links { display: flex; flex-wrap: wrap; align-items: baseline; gap: .7rem 1.2rem; font-size: .85rem; }
.learning-support-links > a { color: var(--forest); text-underline-offset: .2rem; }
.learning-help summary, .learning-save summary { text-decoration: underline; text-underline-offset: .2rem; }
.learning-help[open], .learning-save[open] { flex-basis: 100%; }
.learning-save textarea { display: block; width: 100%; height: 180px; margin-top: .5rem; padding: .75rem; border: 1px solid var(--line); border-radius: .4rem; background: var(--soft); color: var(--ink); font: .85rem/1.6 Consolas, "Courier New", monospace; resize: vertical; text-align: left; }
.learning-help-content { max-width: 62ch; padding: 1rem; margin-top: .5rem; border: 1px solid var(--line); border-radius: .6rem; background: var(--surface); }
.learning-help-content p:last-child { margin-bottom: 0; }
.learning-help-content pre { overflow-x: auto; text-align: left; }
.learning-edit-note { margin-block: .6rem 0; max-width: 72ch; color: var(--muted); font-size: .78rem; }
.learning-check-actions { margin-block: 1rem; gap: .5rem; }
.learning-check-actions [hidden], .exercise-feedback[hidden] { display: none; }
.learning-check-actions .source-note { flex-basis: 100%; margin: 0; font-size: .85rem; }
.exercise-feedback { margin-block: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: .6rem; background: var(--surface); }
.exercise-feedback h3 { margin: 0 0 .5rem; font-size: 1rem; }
.exercise-feedback ul { margin-block: .75rem 0; padding-inline-start: 1.3rem; }
.exercise-feedback li + li { margin-top: .5rem; }
.exercise-feedback li { unicode-bidi: plaintext; }
.exercise-feedback [data-passed="true"] strong { color: var(--forest); }
.exercise-check-frame { position: fixed; left: -10000px; top: 0; width: 480px; height: 300px; visibility: hidden; pointer-events: none; border: 0; }
.learning-image-picker { margin-bottom: .85rem; padding: .8rem; border: 1px solid var(--line); border-radius: .6rem; background: var(--surface); }
.learning-image-picker label { display: block; margin-bottom: .4rem; font-size: .9rem; }
.learning-image-picker input { max-width: 100%; color: var(--ink); font: inherit; font-size: .85rem; }
.learning-image-picker .source-note { margin: .5rem 0 0; font-size: .8rem; }
.learning-local-setup, .learning-project-check { margin-block: 1rem; font-size: .9rem; }
.learning-local-setup ol { max-width: 62ch; padding-inline-start: 1.3rem; }
.learning-project-check .guide-block { padding-block: 1rem; border: 0; }
.learning-project-check h2 { font-size: 1.1rem; }
.learning-project-check .eyebrow { display: none; }
.learning-reference-page { max-width: 900px; padding-block: 1.75rem 3rem; }
.learning-reference-page .guide-block h2 { font-size: 1.5rem; }
.learning-workspace-tabs { display: none; }
.learning-preview-status { margin-block: 0 .75rem; color: var(--caution); font-size: .9rem; overflow-wrap: anywhere; }
.learning-preview-status:empty { display: none; }
.learning-csharp-panels { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
.learning-csharp-panels .csharp-playground { height: 475px; margin-block: 0; }
.learning-csharp-panels .source-note { font-size: .8rem; }
.learning-csharp-instruction { margin-block: 0 .65rem; }
[data-csharp-status]:empty { display: none; }
[data-practice-language="csharp"] .learning-code-panel textarea { height: 250px; }
[data-learning-lesson="task-list"] .learning-code-panel textarea { height: 365px; }
[data-learning-lesson="personal-page-style"] .learning-code-panel textarea,
[data-learning-lesson="personal-page-interaction"] .learning-code-panel textarea,
[data-learning-lesson="personal-page-interaction"] .web-preview { height: 325px; }
.learning-reference-page .support-material pre { overflow-x: auto; text-align: left; }

@media (max-width: 1100px) {
    .learning-csharp-panels { grid-template-columns: 1fr; }
}

@media (max-width: 850px) {
    .learning-screen { grid-template-columns: 1fr; gap: 1.2rem; padding-top: 1rem; }
    .learning-sidebar { position: static; }
    .learning-back-link { margin-bottom: .65rem; }
    .learning-navigation { padding: .65rem .8rem; }
}

@media (max-width: 700px) {
    .learning-workspace-tabs { display: flex; margin-bottom: .6rem; border-bottom: 1px solid var(--line); }
    .learning-workspace-tabs button { border: 0; border-bottom: 3px solid transparent; padding: .5rem 1.2rem; color: var(--muted); background: transparent; font: inherit; cursor: pointer; }
    .learning-workspace-tabs button[aria-selected="true"] { border-bottom-color: var(--forest); color: var(--forest); font-weight: 700; }
    .learning-workspace-panels { grid-template-columns: 1fr; }
    .learning-workspace [hidden] { display: none; }
    .learning-header { margin-bottom: .9rem; }
}

@media (max-width: 850px) {
    .stage-layout { grid-template-columns: 1fr; }
    .stage-navigation { position: static; }
    .example-grid { grid-template-columns: 1fr; }
    .learning-summary { flex-direction: column; align-items: flex-start; gap: .6rem; }
    .hero-grid, .course-detail-grid { grid-template-columns: 1fr; }
    .hero-card { max-width: 520px; }
    .stage-grid { grid-template-columns: repeat(2, 1fr); }
    .stage-card h3 { min-height: auto; }
    .course-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    .shell { width: min(100% - 1.5rem, 1120px); }
    .navigation { display: grid; grid-template-columns: 1fr auto; padding-block: .65rem; gap: .65rem; }
    .navigation > nav { grid-column: 1 / -1; grid-row: 2; justify-content: center; flex-wrap: wrap; }
    .navigation > nav a { white-space: nowrap; }
    .brand span { display: none; }
    .brand { font-size: 1.05rem; }
    nav { gap: .75rem; }
    .site-controls { gap: .4rem; }
    nav a { font-size: .84rem; }
    .hero { padding-block: 3.5rem; }
    .hero h1 { max-width: 20ch; }
    .glossary { grid-template-columns: 1fr; }
    .preview-personalise { grid-template-columns: 1fr; }
    .section-heading { display: block; }
    .footer-content { flex-direction: column; gap: 1rem; padding-block: 1.75rem; text-align: center; }
    .footer-meta { justify-items: center; gap: .5rem; }
    .footer-links { justify-content: center; gap: .1rem 1rem; }
    .section-heading > p { margin-top: 1rem; }
    .feature-grid, .stage-grid, .path-grid, .methodology-grid, .path-facts, .fact-strip, .timeline-content dl { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 3rem 1fr; column-gap: 1rem; }
    .timeline-marker { width: 2.75rem; height: 2.75rem; }
    .timeline-item:not(:last-child)::before { inset-block-start: 2.75rem; inset-inline-start: 1.375rem; }
    .fact-strip { margin-bottom: 2.5rem; }
    .assessment-row { grid-template-columns: 1fr; gap: .3rem; }
}