/* ==========================================================================
   OhMyCode Academy public site - plain CSS, no build step, no external requests.
   Identity: "Ink & Highlighter" (ink-indigo surfaces, one yellow highlighter, Bricolage Grotesque for
   headings, Figtree for text). Tokens mirror frontend/src/styles.scss on purpose: this site is served as
   static files outside the Angular bundle, so they are duplicated here (see docs/PRODUCTION_DEPLOYMENT.md,
   "Public landing site"). Fonts are self-hosted (frontend/landing/fonts, SIL OFL) because the site's
   Content-Security-Policy only allows font-src 'self'.
   ========================================================================== */
@font-face { font-family: 'Bricolage Grotesque Variable'; font-style: normal; font-display: swap; font-weight: 200 800; src: url('/fonts/bricolage-grotesque-latin-wght-normal.woff2') format('woff2-variations'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: 'Figtree Variable'; font-style: normal; font-display: swap; font-weight: 300 900; src: url('/fonts/figtree-latin-wght-normal.woff2') format('woff2-variations'); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  --font-display: 'Bricolage Grotesque Variable', 'Bricolage Grotesque', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Figtree Variable', 'Figtree', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'SF Mono', Consolas, 'Liberation Mono', monospace;

  --ink: #1c1b4d; --ink-raised: #29287a; --ink-line: rgba(255, 255, 255, .13);
  --on-ink: #f1f0ff; --on-ink-muted: #bcbbe6;
  --highlighter: #ffe14d; --on-highlighter: #1c1b4d;
  --brand: #4f46e5; --brand-strong: #4338ca; --brand-soft: #eef0ff;
  --text-primary: #4338ca;

  --page: #f4f5fb; --surface: #ffffff; --surface-subtle: #f7f8fc;
  --text: #171a2e; --text-muted: #565e75;
  --border: #dfe3ee; --border-strong: #c7cddd;
  --focus: #6366f1;
  --shadow-card: 0 1px 2px rgba(20, 26, 48, .06);
  --shadow-lift: 0 24px 56px rgba(20, 22, 60, .28);

  --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem; --space-5: 1.5rem; --space-6: 2rem; --space-8: 3rem; --space-10: 4.5rem; --space-12: 6.5rem;
  --radius-sm: .5rem; --radius-md: .875rem; --radius-lg: 1.5rem;
  --ease-out: cubic-bezier(.23, 1, .32, 1);
  --shell: 72rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --brand: #818cf8; --brand-strong: #97a1fa; --brand-soft: #1d2247; --text-primary: #a5b4fc;
    --page: #0c0e1d; --surface: #151a2e; --surface-subtle: #1a2037; --text: #e9ecf6; --text-muted: #a0a9c2;
    --border: #2a3250; --border-strong: #3a4468; --focus: #a5b4fc; --shadow-card: 0 1px 2px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --brand: #818cf8; --brand-strong: #97a1fa; --brand-soft: #1d2247; --text-primary: #a5b4fc;
  --page: #0c0e1d; --surface: #151a2e; --surface-subtle: #1a2037; --text: #e9ecf6; --text-muted: #a0a9c2;
  --border: #2a3250; --border-strong: #3a4468; --focus: #a5b4fc; --shadow-card: 0 1px 2px rgba(0, 0, 0, .4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; font-family: var(--font-body); font-size: 1.0625rem; line-height: 1.65; background: var(--page); color: var(--text); -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: var(--text-primary); text-underline-offset: .18em; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: .25rem; }
h1, h2, h3 { font-family: var(--font-display); color: var(--text); margin: 0; letter-spacing: -.025em; text-wrap: balance; }
h1 { font-size: clamp(2.5rem, 6.4vw, 4.75rem); line-height: 1.02; font-weight: 800; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.08; font-weight: 750; }
h3 { font-size: 1.25rem; line-height: 1.25; font-weight: 700; letter-spacing: -.015em; }
p { margin: 0; }
.shell { width: min(100% - 2rem, var(--shell)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: .75rem; top: -4rem; z-index: 100; padding: .6rem 1rem; border-radius: var(--radius-sm); background: var(--highlighter); color: var(--on-highlighter); font-weight: 700; text-decoration: none; transition: top .15s var(--ease-out); }
.skip-link:focus { top: .75rem; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 2.75rem; padding: 0 1.25rem; border-radius: 999px; border: 1px solid transparent; font: 650 1rem/1 var(--font-body); text-decoration: none; cursor: pointer; transition: transform .12s var(--ease-out), background-color .15s ease, border-color .15s ease, box-shadow .15s ease; }
.btn:active { transform: scale(.97); }
.btn-lg { min-height: 3.25rem; padding: 0 1.75rem; font-size: 1.0625rem; }
.btn-primary { background: var(--highlighter); color: var(--on-highlighter); }
.btn-primary:hover { box-shadow: 0 8px 22px rgba(255, 225, 77, .34); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: var(--brand); color: var(--text-primary); }
.btn-ghost-ink { background: transparent; color: var(--on-ink); border-color: var(--ink-line); }
.btn-ghost-ink:hover { background: var(--ink-raised); }
.btn-ink { background: var(--ink); color: var(--on-ink); }
.btn-ink:hover { background: var(--ink-raised); }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--ink) 94%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--ink-line); }
.site-header__row { display: flex; align-items: center; gap: var(--space-5); min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font: 800 1.25rem/1 var(--font-display); letter-spacing: -.03em; color: var(--on-ink); text-decoration: none; }
.brand em { font-style: normal; color: var(--highlighter); }
.brand__mark { width: 2rem; height: 2rem; }
.nav { margin-inline-start: auto; }
.nav__links { display: flex; align-items: center; gap: var(--space-5); list-style: none; margin: 0; padding: 0; }
.nav__links a { color: var(--on-ink-muted); font-weight: 600; font-size: .9375rem; text-decoration: none; transition: color .15s ease; }
.nav__links a:hover { color: var(--on-ink); }
.nav__links-cta { display: none; }
.nav__actions { display: flex; align-items: center; gap: var(--space-2); }
.nav__actions .btn { min-height: 2.5rem; padding: 0 1rem; font-size: .9375rem; }
.lang { color: var(--on-ink-muted); font-weight: 700; font-size: .875rem; text-decoration: none; padding: .35rem .6rem; border-radius: 999px; border: 1px solid var(--ink-line); }
.lang:hover { color: var(--on-ink); background: var(--ink-raised); }
.theme-toggle, .nav-toggle { display: inline-grid; place-items: center; width: 2.5rem; height: 2.5rem; border-radius: 999px; border: 1px solid var(--ink-line); background: transparent; color: var(--on-ink); cursor: pointer; transition: background-color .15s ease; }
.theme-toggle:hover, .nav-toggle:hover { background: var(--ink-raised); }
.theme-toggle svg, .nav-toggle svg { width: 1.2rem; height: 1.2rem; }
.nav-toggle { display: none; }
.site-header .btn-secondary { color: var(--on-ink); border-color: var(--ink-line); }
.site-header .btn-secondary:hover { background: var(--ink-raised); color: var(--on-ink); }

/* ---------- hero ---------- */
.hero { position: relative; isolation: isolate; background: var(--ink); color: var(--on-ink); overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, .11) 1px, transparent 0) 0 0 / 24px 24px; mask-image: linear-gradient(100deg, transparent 10%, #000 90%); -webkit-mask-image: linear-gradient(100deg, transparent 10%, #000 90%); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: var(--space-10); align-items: center; padding-block: var(--space-12) var(--space-12); }
.hero h1 { color: #fff; max-width: 14ch; }
.mark { background: linear-gradient(var(--highlighter), var(--highlighter)) 0 88% / 100% .42em no-repeat; color: inherit; padding-inline: .08em; margin-inline: -.08em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.hero .mark { color: #fff; }
.hero__lead { margin-top: var(--space-5); max-width: 34rem; font-size: 1.1875rem; color: var(--on-ink-muted); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
.hero__meta { margin-top: var(--space-6); display: flex; flex-wrap: wrap; gap: .5rem var(--space-5); color: var(--on-ink-muted); font-size: .9375rem; }
.hero__meta span::before { content: ''; display: inline-block; width: .5rem; height: .5rem; margin-inline-end: .5rem; border-radius: 2px; background: var(--highlighter); }

/* the code review window: the one memorable element */
.codewin { margin: 0; position: relative; border-radius: var(--radius-md); background: #12113a; border: 1px solid var(--ink-line); box-shadow: var(--shadow-lift); overflow: hidden; }
.codewin__bar { display: flex; align-items: center; gap: .5rem; padding: .7rem 1rem; border-bottom: 1px solid var(--ink-line); background: rgba(255, 255, 255, .03); }
.codewin__dot { width: .65rem; height: .65rem; border-radius: 50%; background: rgba(255, 255, 255, .22); }
.codewin__file { margin-inline-start: .5rem; font: 600 .8125rem/1 var(--font-mono); color: var(--on-ink-muted); }
.codewin__tag { margin-inline-start: auto; font-size: .75rem; font-weight: 700; padding: .25rem .6rem; border-radius: 999px; background: rgba(255, 255, 255, .08); color: var(--on-ink-muted); }
.codewin pre { margin: 0; padding: 1.1rem 0 1.25rem; font: 500 .9375rem/1.85 var(--font-mono); color: #e7e6ff; overflow-x: auto; }
.codewin code { display: block; }
.ln { display: grid; grid-template-columns: 2.75rem 1fr; padding-inline-end: 1rem; }
.ln > b { text-align: end; padding-inline-end: 1rem; font-weight: 400; color: rgba(255, 255, 255, .32); user-select: none; }
.ln--flag { background: linear-gradient(90deg, rgba(255, 225, 77, .26), rgba(255, 225, 77, .1)); box-shadow: inset 3px 0 0 var(--highlighter); }
.k { color: #c4b5fd; } .f { color: #7dd3fc; } .s { color: #86efac; } .c { color: #a3a3d4; font-style: italic; } .n { color: #fcd34d; }
.review { margin: .25rem 1rem 1rem 3.75rem; padding: .85rem 1rem; border-radius: var(--radius-sm); background: var(--highlighter); color: var(--on-highlighter); font: 600 .9375rem/1.45 var(--font-body); box-shadow: 0 10px 28px rgba(0, 0, 0, .3); }
.review small { display: block; margin-bottom: .2rem; font-weight: 700; font-size: .75rem; letter-spacing: .02em; opacity: .75; }
.codewin__foot { display: flex; flex-wrap: wrap; gap: .5rem; padding: .75rem 1rem 1rem; border-top: 1px solid var(--ink-line); }
.chip { display: inline-flex; align-items: center; gap: .4rem; padding: .3rem .7rem; border-radius: 999px; background: rgba(255, 255, 255, .07); color: var(--on-ink-muted); font-size: .8125rem; font-weight: 650; }
.chip--hot { background: rgba(255, 225, 77, .16); color: var(--highlighter); }
@keyframes line-in { from { opacity: 0; transform: translateY(6px); } }
@keyframes sweep { from { background-size: 0 100%; } }
@keyframes note-in { from { opacity: 0; transform: translateY(-8px) scale(.98); } }
.codewin .ln { animation: line-in .5s var(--ease-out) both; }
.codewin .ln:nth-child(2) { animation-delay: .08s; } .codewin .ln:nth-child(3) { animation-delay: .16s; } .codewin .ln:nth-child(4) { animation-delay: .24s; } .codewin .ln:nth-child(5) { animation-delay: .32s; }
.codewin .ln--flag { animation: line-in .5s var(--ease-out) .32s both, sweep .7s var(--ease-out) .8s both; background-repeat: no-repeat; background-size: 100% 100%; }
.codewin .review { animation: note-in .5s var(--ease-out) 1.25s both; }

/* ---------- sections ---------- */
section { padding-block: var(--space-12); }
.section-head { max-width: 40rem; margin-bottom: var(--space-8); }
.section-head p { margin-top: var(--space-4); color: var(--text-muted); font-size: 1.125rem; }
.section-head--tight { margin-bottom: var(--space-5); }
section.flush-top { padding-top: 0; }
.spot__lead { margin-top: var(--space-4); color: var(--text-muted); font-size: 1.125rem; }
.timeline__note { margin-top: var(--space-4); font-size: .8125rem; color: var(--on-ink-muted); }
.tint { background: var(--surface-subtle); border-block: 1px solid var(--border); }

/* audiences: three plain columns divided by rules, not cards */
.audiences { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.audience { padding: 0 var(--space-6); border-inline-start: 2px solid var(--border-strong); }
.audience:first-child { padding-inline-start: var(--space-6); }
.audience h3 { margin-bottom: var(--space-2); }
.audience p { color: var(--text-muted); }

/* course index: typographic rows */
.index { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--text); }
.index li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: var(--space-5) var(--space-8); align-items: baseline; padding: var(--space-5) 0; border-bottom: 1px solid var(--border-strong); }
.index__name { font: 750 clamp(1.4rem, 2.4vw, 1.9rem)/1.15 var(--font-display); letter-spacing: -.02em; }
.index li.core .index__name { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.index__core { margin-inline-start: .75rem; vertical-align: middle; font: 700 .75rem/1 var(--font-body); padding: .3rem .6rem; border-radius: 999px; background: var(--highlighter); color: var(--on-highlighter); letter-spacing: 0; }
.index p { color: var(--text-muted); }
.note { margin-top: var(--space-5); max-width: 40rem; font-size: .9375rem; color: var(--text-muted); }

/* journey: a real sequence, so it is numbered */
.journey { counter-reset: step; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--space-5); }
.journey li { counter-increment: step; position: relative; padding-top: var(--space-6); border-top: 3px solid var(--text); }
.journey li::before { content: counter(step); position: absolute; top: -1.4rem; inset-inline-start: 0; display: grid; place-items: center; width: 2.2rem; height: 2.2rem; border-radius: 50%; background: var(--highlighter); color: var(--on-highlighter); font: 800 1rem/1 var(--font-display); }
.journey h3 { font-size: 1.125rem; margin-bottom: var(--space-2); }
.journey p { color: var(--text-muted); font-size: .9688rem; }

/* code lab spotlight */
.spot { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: var(--space-10); align-items: start; }
.spot ul { list-style: none; margin: var(--space-5) 0 0; padding: 0; display: grid; gap: var(--space-4); }
.spot li { padding-inline-start: 1.6rem; position: relative; }
.spot li::before { content: ''; position: absolute; inset-inline-start: 0; top: .6em; width: .65rem; height: .65rem; border-radius: 2px; background: var(--highlighter); outline: 2px solid var(--ink); outline-offset: -2px; }
.spot li strong { display: block; font-family: var(--font-display); font-size: 1.125rem; }
.spot li span { color: var(--text-muted); }
.timeline { background: var(--ink); color: var(--on-ink); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-lift); }
.timeline h3 { color: #fff; margin-bottom: var(--space-4); }
.rev { display: grid; grid-template-columns: auto 1fr; gap: .25rem var(--space-4); padding: var(--space-4) 0; border-top: 1px solid var(--ink-line); }
.rev:first-of-type { border-top: 0; padding-top: 0; }
.rev b { grid-row: span 2; display: grid; place-items: center; width: 2.4rem; height: 2.4rem; border-radius: 50%; background: var(--ink-raised); font: 800 .9375rem/1 var(--font-display); }
.rev strong { font-weight: 700; }
.rev span { color: var(--on-ink-muted); font-size: .9375rem; }
.rev--ok b { background: var(--highlighter); color: var(--on-highlighter); }

/* parents */
.parents { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-6) var(--space-10); }
.parents div { padding-block: var(--space-4); border-top: 2px solid var(--text); }
.parents h3 { margin-bottom: var(--space-2); }
.parents p { color: var(--text-muted); }

/* begin */
.begin { background: var(--ink); color: var(--on-ink); border-radius: var(--radius-lg); padding: clamp(2rem, 6vw, 4.5rem); position: relative; isolation: isolate; overflow: hidden; }
.begin::after { content: '</>'; position: absolute; inset-inline-end: 1.5rem; bottom: -2.6rem; z-index: -1; font: 800 clamp(7rem, 20vw, 14rem)/1 var(--font-display); letter-spacing: -.06em; color: var(--ink-raised); }
.begin h2 { color: #fff; max-width: 18ch; }
.begin p { margin-top: var(--space-4); max-width: 34rem; color: var(--on-ink-muted); font-size: 1.125rem; }
.begin .hero__actions { margin-top: var(--space-6); }
.begin ol { margin: var(--space-6) 0 0; padding-inline-start: 1.25rem; max-width: 36rem; color: var(--on-ink); display: grid; gap: var(--space-2); }
.faq { max-width: 46rem; }
.faq details { border-bottom: 1px solid var(--border-strong); }
.faq details:first-child { border-top: 2px solid var(--text); }
.faq summary { cursor: pointer; list-style: none; padding: var(--space-4) 0; font: 700 1.125rem/1.3 var(--font-display); display: flex; justify-content: space-between; gap: var(--space-4); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; flex: none; font-size: 1.5rem; line-height: 1; color: var(--text-primary); transition: transform .2s var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { padding-bottom: var(--space-4); color: var(--text-muted); max-width: 40rem; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: var(--on-ink-muted); padding-block: var(--space-10) var(--space-6); font-size: .9688rem; }
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.footer__grid h3 { font: 700 .875rem/1.2 var(--font-body); color: #fff; letter-spacing: 0; margin-bottom: var(--space-3); }
.footer__grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.footer__grid a, .site-footer a { color: var(--on-ink-muted); text-decoration: none; }
.footer__grid a:hover, .site-footer a:hover { color: #fff; text-decoration: underline; }
.footer__grid p { margin-top: var(--space-3); max-width: 20rem; }
.footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-8); padding-top: var(--space-5); border-top: 1px solid var(--ink-line); font-size: .875rem; }

/* ---------- legal pages (privacy / terms) ---------- */
body.legal main { width: min(100% - 2rem, 46rem); margin: 0 auto; padding-block: var(--space-10); }
body.legal h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: var(--space-4); }
body.legal p { margin-top: var(--space-4); color: var(--text); }
body.legal .site-footer { padding-block: var(--space-5); }
body.legal .footer__bottom { margin-top: 0; padding-top: 0; border-top: 0; }

/* ---------- responsive ---------- */
@media (max-width: 64rem) {
  .hero__grid, .spot { grid-template-columns: minmax(0, 1fr); gap: var(--space-8); }
  .hero__grid { padding-block: var(--space-10); }
  .hero h1 { max-width: 18ch; }
  .journey { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-8) var(--space-6); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 56rem) {
  .nav { position: absolute; inset-inline: 0; top: 100%; display: none; background: var(--ink); border-bottom: 1px solid var(--ink-line); padding: var(--space-4) 1rem var(--space-5); }
  .site-header.nav-open .nav { display: block; }
  .nav__links { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .nav__links a { font-size: 1.0625rem; }
  .nav__links-cta { display: list-item; }
  .nav-toggle { display: inline-grid; }
  .nav__actions .btn { display: none; }
  .nav__actions { margin-inline-start: auto; }
  .nav { margin-inline-start: 0; }
  .site-header__row { gap: var(--space-3); }
  .audiences { grid-template-columns: minmax(0, 1fr); gap: var(--space-6); }
  .audience, .audience:first-child { padding-inline-start: var(--space-5); padding-inline-end: 0; }
  .index li { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
  .parents { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
}
@media (max-width: 36rem) {
  section { padding-block: var(--space-10); }
  .journey { grid-template-columns: minmax(0, 1fr); }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .review { margin-inline-start: 1rem; }
  .ln { grid-template-columns: 2.25rem 1fr; }
  .codewin pre { font-size: .8438rem; }
  .btn-lg { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .codewin .ln, .codewin .ln--flag, .codewin .review { animation: none; }
  .btn, .faq summary::after, .skip-link { transition: none; }
  .btn:active { transform: none; }
}
@media print { .site-header, .nav-toggle, .theme-toggle { display: none; } .hero, .begin, .site-footer { background: #fff; color: #000; } }