/* ==========================================================================
   Genius Bit Academy: site.css
   tokens → base → layout → components → utilities
   ========================================================================== */

/* 1. Fonts & tokens ======================================================== */

@font-face { font-family: "Lexend"; src: url("/assets/fonts/lexend-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Inter"; src: url("/assets/fonts/inter-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900; font-display: swap; }

:root {
  /* Logo palette (measured from assets/images/logo-*.png): fills, borders, illustrations ONLY */
  --c-blue:#3399ff; --c-yellow:#ffcc00; --c-red:#ff0000; --c-green:#009966; --c-purple:#993399; --c-orange:#ff6600;
  /* AA-safe text variants (>= 4.5:1 on #fff and #f6f8fc) */
  --c-blue-text:#2774c2; --c-yellow-text:#8a6e00; --c-red-text:#e60000;
  --c-green-text:#008257; --c-purple-text:#993399; --c-orange-text:#c24e00;
  /* Neutrals */
  --c-ink:#0b1b33;     /* 17.2:1 on white: body text, primary buttons, footer background */
  --c-ink-2:#334155;   /* 10.4:1: secondary text */
  --c-muted:#475569;   /* 7.1:1 on --c-bg-soft: captions/meta (#64748b fails at 4.48) */
  --c-bg:#ffffff; --c-bg-soft:#f6f8fc; --c-line:#e2e8f0;

  --font-head:"Lexend", system-ui, "Segoe UI", Roboto, sans-serif;
  --font-body:"Inter", system-ui, "Segoe UI", Roboto, sans-serif;
  --fs-body:clamp(1rem, .96rem + .2vw, 1.0625rem);
  --fs-h1:clamp(2.1rem, 1.5rem + 3vw, 3.75rem);
  --fs-h2:clamp(1.6rem, 1.3rem + 1.5vw, 2.5rem);
  --fs-h3:clamp(1.2rem, 1.1rem + .5vw, 1.5rem);
  --radius-s:8px; --radius-m:16px; --radius-l:28px; --radius-pill:999px;
  --shadow-s:0 1px 2px rgb(11 27 51 / .06), 0 1px 3px rgb(11 27 51 / .08);
  --shadow-m:0 8px 24px rgb(11 27 51 / .10);
  --ease:cubic-bezier(.4,0,.2,1);
  --container:1200px;
  --space-section:clamp(3.5rem, 2.5rem + 5vw, 7rem);

  --gutter:clamp(1rem, .5rem + 2.5vw, 2rem);
  --header-h:76px;
}

/* 2. Base ================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--c-ink-2);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

body.no-scroll { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--c-ink);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

a { color: var(--c-blue-text); text-underline-offset: .2em; }
a:hover { color: var(--c-ink); }

ul[role="list"], ol[role="list"] { list-style: none; margin: 0; padding: 0; }

button, input, textarea, select { font: inherit; color: inherit; }

:focus-visible { outline: 3px solid var(--c-blue-text); outline-offset: 2px; }
main:focus { outline: none; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  padding: .75rem 1rem;
  border-radius: var(--radius-s);
  background: var(--c-ink);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; color: #fff; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .svg-blink, .svg-spin, .svg-float { animation: none !important; }
  html.js .reveal { opacity: 1; transform: none; }
}

/* 3. Layout ================================================================ */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--space-section); }
.section--soft { background: var(--c-bg-soft); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: clamp(1rem, .75rem + 1vw, 1.75rem);
}

.split {
  display: grid;
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: center;
}
@media (min-width: 992px) {
  .split { grid-template-columns: 1fr 1fr; }
}

.section-head { max-width: 48rem; margin: 0 auto clamp(2rem, 1.5rem + 2vw, 3rem); }
.section-head__sub { font-size: 1.125rem; color: var(--c-ink-2); }

.lead { font-size: clamp(1.1rem, 1rem + .4vw, 1.3rem); color: var(--c-ink-2); }

.eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: .35rem .9rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: var(--c-bg);
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-blue-text);
}

.hl {
  background: linear-gradient(transparent 60%, var(--c-yellow) 60% 90%, transparent 90%);
  padding-inline: .08em;
}

/* 4. Components ============================================================ */

/* --- Illustrations ------------------------------------------------------- */

.ill { width: 100%; height: auto; overflow: visible; }

@keyframes svg-blink { 0%, 55%, 100% { opacity: 1; } 70%, 85% { opacity: .2; } }
@keyframes svg-spin { 50% { transform: scaleX(.15); } }
@keyframes svg-float { 50% { transform: translateY(-6px); } }
.svg-blink { animation: svg-blink 2.2s ease-in-out infinite; }
.svg-spin { transform-box: fill-box; transform-origin: center; animation: svg-spin .3s linear infinite; }
.svg-float { animation: svg-float 4s var(--ease) infinite; }

/* --- Header & navigation ------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.site-header.is-scrolled { border-color: var(--c-line); box-shadow: var(--shadow-m); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand { display: inline-block; flex-shrink: 0; border-radius: var(--radius-s); }
.brand img { width: auto; height: 56px; }

.nav__link,
.nav__group {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .6rem .8rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: none;
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-ink);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.nav__link:hover, .nav__group:hover { background: var(--c-bg-soft); color: var(--c-ink); }
.nav__link[aria-current="page"], .nav__group.is-active {
  background: var(--c-bg-soft);
  box-shadow: inset 0 -3px 0 var(--c-blue);
}

.nav__chevron { width: 12px; height: 12px; transition: transform .2s var(--ease); }
.nav__group[aria-expanded="true"] .nav__chevron { transform: rotate(180deg); }

.nav__menu a {
  display: block;
  padding: .55rem .75rem;
  border-radius: var(--radius-s);
  color: var(--c-ink);
  text-decoration: none;
}
.nav__menu a:hover { background: var(--c-bg-soft); color: var(--c-ink); }
.nav__menu a[aria-current="page"] { background: var(--c-bg-soft); font-weight: 600; box-shadow: inset 3px 0 0 var(--c-blue); }

.social { display: flex; gap: .25rem; }
.social a {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: var(--c-ink);
}
.social a:hover { background: var(--c-bg-soft); color: var(--c-blue-text); }
.social svg { width: 20px; height: 20px; }

.nav-toggle { display: none; }

@media (min-width: 992px) {
  .nav { display: flex; align-items: center; gap: 1rem; }
  .nav__list { display: flex; align-items: center; gap: .15rem; }
  .nav__item--group { position: relative; }
  .nav__menu {
    position: absolute;
    top: calc(100% + .5rem);
    left: 0;
    min-width: 16rem;
    padding: .5rem;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-m);
    background: var(--c-bg);
    box-shadow: var(--shadow-m);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
  }
  .nav__menu::before { content: ""; position: absolute; inset: -.6rem 0 auto; height: .6rem; }
  .nav__item--group:hover > .nav__menu,
  .nav__item--group:focus-within > .nav__menu,
  .nav__group[aria-expanded="true"] + .nav__menu { opacity: 1; visibility: visible; transform: none; }
}

@media (min-width: 992px) and (max-width: 1199.98px) {
  .nav__social { display: none; }
}

@media (max-width: 991.98px) {
  html.js .nav-toggle {
    display: inline-grid;
    place-content: center;
    gap: 5px;
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: var(--radius-s);
    background: var(--c-bg-soft);
    cursor: pointer;
  }
  .nav-toggle__bar {
    display: block;
    width: 22px;
    height: 2.5px;
    border-radius: 2px;
    background: var(--c-ink);
    transition: transform .25s var(--ease), opacity .2s;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  html.js .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem var(--gutter) 2rem;
    overflow-y: auto;
    background: var(--c-bg);
    border-top: 1px solid var(--c-line);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .3s var(--ease), visibility .3s;
  }
  html.js .nav.is-open { transform: none; visibility: visible; }

  .nav__link, .nav__group {
    width: 100%;
    justify-content: space-between;
    padding: .85rem .75rem;
    border-radius: var(--radius-s);
    font-size: 1.05rem;
  }
  .nav__menu { padding: 0 0 .5rem 1rem; }
  html.js .nav__menu { display: none; }
  html.js .nav__group[aria-expanded="true"] + .nav__menu { display: block; }

  /* Without JS the menu is a plain expanded list below the logo. */
  html:not(.js) .site-header { position: static; }
  html:not(.js) .site-header__inner { flex-wrap: wrap; padding-block: .5rem; }
  html:not(.js) .nav { flex-basis: 100%; }
}

/* --- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 48px;
  padding: .7rem 1.4rem;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--c-ink); color: #fff; }
.btn--primary:hover { background: #1c3257; color: #fff; }
.btn--accent { background: var(--c-yellow); color: var(--c-ink); }
.btn--accent:hover { background: #ffd83d; color: var(--c-ink); }
.btn--ghost { border-color: var(--c-ink); background: transparent; color: var(--c-ink); }
.btn--ghost:hover { background: var(--c-ink); color: #fff; }

/* --- Hero (homepage) ----------------------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.5rem, 1.5rem + 4vw, 5.5rem) clamp(4rem, 3rem + 5vw, 8rem);
  background: var(--c-bg-soft) url("/assets/images/circuit-trace.svg") center / 240px repeat;
}
.hero__inner { display: grid; gap: clamp(2.5rem, 2rem + 3vw, 4rem); align-items: center; }
@media (min-width: 992px) {
  .hero__inner { grid-template-columns: 1.05fr .95fr; }
}
.hero__title { margin-bottom: .6em; }
.hero__lead { margin-bottom: 1.75rem; }

.hero__visual { position: relative; width: 100%; max-width: 34rem; margin-inline: auto; }
.hero__blob {
  aspect-ratio: 1;
  overflow: hidden;
  border: 6px solid var(--c-bg);
  border-radius: 46% 54% 42% 58% / 52% 44% 56% 48%;
  background: var(--c-yellow);
  box-shadow: var(--shadow-m);
}
.hero__blob img { width: 100%; height: 100%; object-fit: cover; }
.hero__robot { position: absolute; left: -4%; bottom: -8%; width: 38%; }
.hero__dot { position: absolute; border-radius: 50%; }
.hero__dot--blue { top: 4%; right: 6%; width: 18px; height: 18px; background: var(--c-blue); }
.hero__dot--red { top: 18%; left: -2%; width: 12px; height: 12px; background: var(--c-red); }
.hero__dot--green { bottom: 10%; right: -3%; width: 22px; height: 22px; background: var(--c-green); }

/* --- Page hero + breadcrumb ---------------------------------------------- */

.page-hero {
  padding-block: clamp(2.5rem, 1.75rem + 3vw, 4.5rem);
  border-bottom: 1px solid var(--c-line);
  background: var(--c-bg-soft) url("/assets/images/circuit-trace.svg") center / 240px repeat;
}
.page-hero__inner { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 768px) {
  .page-hero__inner--art { grid-template-columns: 1.5fr 1fr; }
}
.page-hero h1 { margin-bottom: .35em; }
.page-hero__art { width: 100%; max-width: 18rem; margin-inline: auto; }

.breadcrumb ol { display: flex; flex-wrap: wrap; gap: .25rem .5rem; margin: 0 0 .9rem; padding: 0; list-style: none; font-size: .9rem; color: var(--c-muted); }
.breadcrumb li + li::before { content: "›"; margin-right: .5rem; color: var(--c-muted); }
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-ink); }
.breadcrumb [aria-current="page"] { font-weight: 600; color: var(--c-ink); }

/* --- Cards & chips ------------------------------------------------------- */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-s);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.card::before { content: ""; display: block; height: 4px; background: var(--card-accent, var(--c-blue)); }
.card:nth-child(6n+1) { --card-accent: var(--c-blue); }
.card:nth-child(6n+2) { --card-accent: var(--c-yellow); }
.card:nth-child(6n+3) { --card-accent: var(--c-red); }
.card:nth-child(6n+4) { --card-accent: var(--c-green); }
.card:nth-child(6n+5) { --card-accent: var(--c-purple); }
.card:nth-child(6n+6) { --card-accent: var(--c-orange); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.card:focus-within { outline: 3px solid var(--c-blue-text); outline-offset: 2px; }

.card__img { width: 100%; aspect-ratio: 416 / 247; object-fit: cover; }
.card__body { display: flex; flex: 1; flex-direction: column; gap: .85rem; padding: 1.25rem; }
.card__title { margin: 0; font-size: 1.125rem; line-height: 1.3; }
.card__title a { color: var(--c-ink); text-decoration: none; }
.card__title a::after { content: ""; position: absolute; inset: 0; }
.card__title a:focus-visible { outline: none; }
.card__foot { margin-top: auto; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: .25rem .7rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: var(--c-bg-soft);
  font-size: .8125rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-ink);
}
.chip--blue { border-color: transparent; background: var(--c-blue); color: var(--c-ink); }
.chip--yellow { border-color: transparent; background: var(--c-yellow); color: var(--c-ink); }
.chip--orange { border-color: transparent; background: var(--c-orange); color: var(--c-ink); }
.chip--green { border-color: transparent; background: var(--c-green); color: var(--c-ink); }
.chip--purple { border-color: transparent; background: var(--c-purple); color: #fff; }
.chip--red { border-color: transparent; background: var(--c-red-text); color: #fff; }

/* --- Counters ------------------------------------------------------------ */

.section--stats { position: relative; z-index: 1; margin-top: calc(-1 * clamp(2.5rem, 2rem + 3vw, 4.5rem)); padding-block: 0; }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(.75rem, .5rem + 1vw, 1.25rem); }
@media (min-width: 768px) {
  .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.stat {
  position: relative;
  padding: 1.5rem 1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-m);
  text-align: center;
}
.stat::before { content: ""; position: absolute; inset: 0 30% auto; height: 4px; border-radius: 0 0 4px 4px; background: var(--stat-accent, var(--c-blue)); }
.stat:nth-child(4n+2) { --stat-accent: var(--c-yellow); }
.stat:nth-child(4n+3) { --stat-accent: var(--c-green); }
.stat:nth-child(4n+4) { --stat-accent: var(--c-orange); }
.stat__num {
  margin: 0 0 .35rem;
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 1.7rem + 2vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
}
.stat__num [data-count-to] { display: inline-block; text-align: right; }
.stat__label { margin: 0; font-weight: 500; color: var(--c-muted); }

/* --- Photo stack (about blocks) ------------------------------------------ */

.photo-stack { position: relative; padding: 0 14% 14% 0; }
.photo-stack__main { width: 100%; border-radius: var(--radius-l); box-shadow: var(--shadow-m); }
.photo-stack__sm {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46%;
  border: 6px solid var(--c-bg);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-m);
}
.photo-stack__deco { position: absolute; top: -6%; right: 2%; width: 30%; }

/* --- Video cards --------------------------------------------------------- */

.video-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-s);
  text-align: left;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.video-card__thumb { position: relative; display: block; aspect-ratio: 16 / 9; background: var(--c-ink); }
.video-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.video-card__play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: auto;
  border-radius: 50%;
  background: var(--c-yellow);
  color: var(--c-ink);
  box-shadow: 0 0 0 8px rgb(255 255 255 / .35);
  transition: transform .25s var(--ease);
}
.video-card__play svg { width: 26px; height: 26px; margin-left: 4px; }
.video-card:hover .video-card__play { transform: scale(1.08); }
.video-card__title { display: block; padding: 1rem 1.25rem; font-family: var(--font-head); font-weight: 600; line-height: 1.35; color: var(--c-ink); }

.video-grid { display: grid; gap: clamp(1rem, .75rem + 1vw, 1.75rem); }
@media (min-width: 992px) {
  .video-grid { grid-template-columns: 1.4fr 1fr; }
  .video-card--large { grid-row: span 2; }
  .video-card--large .video-card__thumb { flex: 1; aspect-ratio: auto; min-height: 18rem; }
  .video-card--large .video-card__title { font-size: 1.25rem; }
}

/* --- Photo gallery ------------------------------------------------------- */

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 9rem), 1fr)); gap: .75rem; }
@media (min-width: 768px) {
  .gallery { grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr)); }
}
.gallery-item {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-s);
  background: var(--c-bg-soft);
  cursor: zoom-in;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s var(--ease); }
.gallery-item:hover img { transform: scale(1.05); }

/* --- Media dialog (video + lightbox) ------------------------------------- */

.media-dialog {
  width: min(100% - 2rem, 1100px);
  max-width: none;
  max-height: 100dvh;
  padding: 0;
  overflow: visible;
  border: 0;
  background: transparent;
  color: #fff;
}
.media-dialog::backdrop { background: rgb(11 27 51 / .9); }
.media-dialog__stage { padding-block: 1rem; }
.media-dialog__bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .75rem; }
.media-dialog__counter { margin: 0; font-family: var(--font-head); font-weight: 600; color: #fff; }
.media-dialog__btn {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--c-bg);
  color: var(--c-ink);
  cursor: pointer;
}
.media-dialog__btn:hover { background: var(--c-yellow); }
.media-dialog__btn svg { width: 22px; height: 22px; }
.media-dialog__close { margin-left: auto; }
.media-dialog__content { position: relative; display: grid; place-items: center; }
.media-dialog__frame { position: relative; width: 100%; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius-m); background: #000; }
.media-dialog__frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.media-dialog__figure { margin: 0; }
.media-dialog__img { width: auto; max-height: calc(100dvh - 7rem); margin-inline: auto; border-radius: var(--radius-s); }
.media-dialog__error {
  min-width: min(80vw, 28rem);
  padding: 3rem 1.5rem;
  border: 1px dashed rgb(255 255 255 / .45);
  border-radius: var(--radius-m);
  background: var(--c-ink);
  font-weight: 600;
  color: #fff;
  text-align: center;
}
.media-dialog__nav { position: absolute; top: 50%; transform: translateY(-50%); box-shadow: var(--shadow-m); }
.media-dialog__nav--prev { left: .5rem; }
.media-dialog__nav--next { right: .5rem; }

/* --- Accordion ----------------------------------------------------------- */

.accordion { overflow: hidden; border: 1px solid var(--c-line); border-radius: var(--radius-m); background: var(--c-bg); }
.accordion + .accordion { margin-top: .75rem; }
.accordion > summary {
  position: relative;
  padding: 1rem 3.25rem 1rem 1.25rem;
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--c-ink);
  list-style: none;
  cursor: pointer;
}
.accordion > summary::-webkit-details-marker { display: none; }
.accordion > summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 1.35rem;
  width: .6rem;
  height: .6rem;
  border-right: 2.5px solid currentColor;
  border-bottom: 2.5px solid currentColor;
  transform: translateY(-70%) rotate(45deg);
  transition: transform .2s var(--ease);
}
.accordion[open] > summary { border-bottom: 1px solid var(--c-line); background: var(--c-bg-soft); }
.accordion[open] > summary::after { transform: translateY(-25%) rotate(-135deg); }
.accordion__body { padding: 1rem 1.25rem 1.25rem; }
.accordion__body ul { margin: 0; padding-left: 1.2rem; }

/* --- Team ---------------------------------------------------------------- */

.team-card { padding: 1rem 1rem 1.25rem; border: 1px solid var(--c-line); border-radius: var(--radius-m); background: var(--c-bg); text-align: center; }
.grid--team { grid-template-columns: repeat(auto-fill, minmax(min(100%, 10rem), 1fr)); }
@media (min-width: 768px) {
  .grid--team { grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); }
}
.team-card img { width: 100%; aspect-ratio: 327 / 423; margin-bottom: 1rem; border-radius: var(--radius-s); object-fit: cover; }
.team-card__name { margin: 0 0 .25rem; font-family: var(--font-head); font-size: 1.05rem; font-weight: 600; color: var(--c-ink); }
.team-card__role { margin: 0; font-size: .9rem; color: var(--c-muted); }

/* --- Events -------------------------------------------------------------- */

.timeline { display: grid; gap: 1.25rem; }
.event-card { display: grid; gap: 1rem; padding: 1rem; border: 1px solid var(--c-line); border-radius: var(--radius-m); background: var(--c-bg); }
@media (min-width: 768px) {
  .event-card { grid-template-columns: 16rem 1fr; align-items: center; }
}
.event-card__title { margin: 0 0 .35rem; font-size: 1.15rem; }
.event-card__meta { margin: 0; font-size: .95rem; color: var(--c-muted); }

/* --- Article prose ------------------------------------------------------- */

.article { max-width: 70ch; margin-inline: auto; }
.article h2 { margin-top: 2em; font-size: clamp(1.35rem, 1.2rem + .8vw, 1.85rem); }
.article h3 { margin-top: 1.6em; }
.article img { margin-block: 1.5rem; border-radius: var(--radius-m); }
.article ul, .article ol { padding-left: 1.25rem; }
.article__meta { font-size: .95rem; color: var(--c-muted); }

/* --- Forms --------------------------------------------------------------- */

.form { display: grid; gap: 1.25rem; }
.field { display: grid; gap: .4rem; }
.field label { font-weight: 600; color: var(--c-ink); }
.field input, .field textarea {
  width: 100%;
  min-height: 48px;
  padding: .75rem 1rem;
  border: 1.5px solid #64748b;
  border-radius: var(--radius-s);
  background: var(--c-bg);
  color: var(--c-ink);
}
.field textarea { min-height: 9rem; resize: vertical; }
.field [aria-invalid="true"] { border-color: var(--c-red-text); }
.field-error { min-height: 1.2em; margin: 0; font-size: .9rem; color: var(--c-red-text); }
.form-status--success, .form-status--error { margin: 0; padding: 1rem 1.25rem; border-radius: var(--radius-s); background: var(--c-bg-soft); color: var(--c-ink); }
.form-status--success { border-left: 4px solid var(--c-green); }
.form-status--error { border-left: 4px solid var(--c-red-text); }

/* --- Call to action band ------------------------------------------------- */

.cta {
  display: grid;
  gap: 1.75rem;
  align-items: center;
  padding: clamp(2rem, 1.5rem + 3vw, 3.75rem);
  border-radius: var(--radius-l);
  background: var(--c-ink) url("/assets/images/circuit-trace.svg") center / 240px repeat;
  background-blend-mode: soft-light;
  color: #cbd5e1;
}
@media (min-width: 992px) {
  .cta { grid-template-columns: 1.4fr 1fr; }
}
.cta__title { margin: 0; color: #fff; }
.cta__accent { color: var(--c-yellow); }
.cta__info { display: grid; gap: .5rem; justify-items: start; }
.cta__label { margin: 0; color: #cbd5e1; }
.cta__phone { margin-bottom: .75rem; font-family: var(--font-head); font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem); font-weight: 700; color: #fff; text-decoration: none; }
.cta__phone:hover { color: var(--c-yellow); }
.cta :focus-visible { outline-color: var(--c-yellow); }

/* --- 404 ----------------------------------------------------------------- */

.notfound { display: grid; justify-items: center; text-align: center; }
.notfound .breadcrumb ol { justify-content: center; }
.notfound__art { width: min(100%, 17rem); margin-bottom: 1.5rem; }

/* --- Footer -------------------------------------------------------------- */

.site-footer { background: var(--c-ink); color: #cbd5e1; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { color: var(--c-yellow); text-decoration: underline; }
.site-footer :focus-visible { outline-color: var(--c-yellow); }
.site-footer__grid { display: grid; gap: 2.5rem; padding-block: clamp(3rem, 2.5rem + 3vw, 4.5rem); }
@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 1.5fr 1fr 1.2fr; }
}
.site-footer__logo img { width: auto; height: 64px; margin-bottom: 1rem; }
.site-footer__title { margin-bottom: 1rem; font-size: 1rem; letter-spacing: .04em; text-transform: uppercase; color: #fff; }
.site-footer__links { display: grid; gap: .6rem; }
.site-footer__contact { display: grid; gap: .8rem; }
.site-footer__contact li { display: flex; gap: .75rem; align-items: flex-start; }
.site-footer__contact svg { flex-shrink: 0; width: 20px; height: 20px; margin-top: .2rem; color: var(--c-yellow); }
.site-footer .social { margin-top: 1rem; margin-left: -.6rem; }
.site-footer .social a { color: #fff; }
.site-footer .social a:hover { background: rgb(255 255 255 / .1); color: var(--c-yellow); text-decoration: none; }
.site-footer__bottom { padding-block: 1.25rem; border-top: 1px solid rgb(255 255 255 / .12); font-size: .9rem; text-align: center; }

/* --- About pages --------------------------------------------------------- */

.photo-pair { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(.75rem, .5rem + 1vw, 1.25rem); align-items: start; }
.photo-pair img { width: 100%; border-radius: var(--radius-l); box-shadow: var(--shadow-m); }
.photo-pair img:last-child { margin-top: clamp(1.5rem, 1rem + 3vw, 3.5rem); }

.accent-cards { display: grid; gap: 1rem; margin-top: 2rem; }
@media (min-width: 576px) {
  .accent-cards { grid-template-columns: 1fr 1fr; }
}
.accent-card {
  padding: 1.5rem;
  border: 1px solid var(--c-line);
  border-top: 4px solid var(--accent, var(--c-blue));
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-s);
}
.accent-card--blue { --accent: var(--c-blue); }
.accent-card--green { --accent: var(--c-green); }
.accent-card h3 { font-size: 1.25rem; }

.icon-list { display: grid; gap: 1rem; }
@media (min-width: 768px) {
  .icon-list { grid-template-columns: 1fr 1fr; }
}
.icon-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
}
.icon-list__icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--icon-bg, var(--c-blue));
  color: var(--c-ink);
}
.icon-list__icon svg { width: 20px; height: 20px; }
.icon-list li:nth-child(6n+2) { --icon-bg: var(--c-yellow); }
.icon-list li:nth-child(6n+3) { --icon-bg: var(--c-green); }
.icon-list li:nth-child(6n+4) { --icon-bg: var(--c-orange); }
.icon-list li:nth-child(6n+5) .icon-list__icon { --icon-bg: var(--c-purple); color: #fff; }
.icon-list li:nth-child(6n+6) .icon-list__icon { --icon-bg: var(--c-red-text); color: #fff; }

.md { display: grid; gap: clamp(2rem, 1rem + 3vw, 4rem); align-items: start; }
@media (min-width: 992px) {
  .md { grid-template-columns: 1fr 2fr; }
  .md__aside { position: sticky; top: calc(var(--header-h) + 1.5rem); }
}
.md__aside { display: grid; gap: 1rem; justify-items: center; }
.md__photo { width: 100%; max-width: 290px; border-radius: var(--radius-l); box-shadow: var(--shadow-m); }
.md__sign { width: 75%; max-width: 220px; }
.md__body { font-size: 1.0625rem; }
.md__closing {
  padding-left: 1rem;
  border-left: 4px solid var(--c-yellow);
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--c-ink);
}

/* --- Genius Lab ---------------------------------------------------------- */

.callout {
  padding: clamp(1.25rem, 1rem + 1.5vw, 2rem);
  border-radius: var(--radius-m);
  background: var(--c-ink);
  font-size: 1.1rem;
  color: #e2e8f0;
}
.chip-nav { display: flex; flex-wrap: wrap; gap: .5rem; margin-block: 2rem; }
a.chip { min-height: 44px; padding-inline: 1rem; font-size: .9rem; text-decoration: none; }
a.chip:hover { border-color: var(--c-ink); color: var(--c-ink); }
.panel-grid { display: grid; gap: 1.25rem; }
@media (min-width: 768px) {
  .panel-grid { grid-template-columns: 1fr 1fr; }
}
.panel { padding: 1.5rem; border: 1px solid var(--c-line); border-radius: var(--radius-m); background: var(--c-bg); box-shadow: var(--shadow-s); }
.panel h3 { font-size: 1.2rem; }
.bullets { display: grid; gap: .6rem; margin: 0; padding-left: 1.2rem; }
.bullets ul { display: grid; gap: .4rem; margin: .5rem 0 0; padding-left: 1.2rem; list-style: circle; }
.bullets li::marker { color: var(--c-blue-text); }
.bullets strong { color: var(--c-ink); }
.gallery--wide { grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.gallery--portrait .gallery-item { aspect-ratio: 3 / 4; }
.gallery--portrait { grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 16rem)); justify-content: center; }

/* --- Courses ------------------------------------------------------------- */

.course-layout { display: grid; gap: clamp(2rem, 1.5rem + 2vw, 3rem); align-items: start; }
@media (min-width: 992px) {
  .course-layout { grid-template-columns: minmax(0, 1fr) 22rem; }
  .course-aside { position: sticky; top: calc(var(--header-h) + 1.5rem); }
}
.course-banner { width: 100%; margin-bottom: 2rem; border-radius: var(--radius-l); box-shadow: var(--shadow-m); }
.course-main > h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 2rem); }
.accordion__sub { margin: 1.1rem 0 .4rem; font-size: 1rem; color: var(--c-ink); }
.accordion__sub:first-child { margin-top: 0; }
.accordion__body li + li { margin-top: .35rem; }
.accordion__body ul ul { margin-top: .4rem; list-style: circle; }
.accordion__body li::marker { color: var(--c-blue-text); }

.course-aside { display: grid; gap: 1.25rem; }
.course-aside__title { font-size: 1.25rem; }
.features { display: grid; gap: .9rem; margin: 0; }
.features div { display: grid; gap: .15rem; padding-bottom: .9rem; border-bottom: 1px solid var(--c-line); }
.features div:last-child { padding-bottom: 0; border-bottom: 0; }
.features dt { font-size: .8125rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--c-muted); }
.features dd { margin: 0; font-weight: 600; color: var(--c-ink); }

.cta--card { padding: 1.75rem; }
@media (min-width: 992px) {
  .cta.cta--card { grid-template-columns: 1fr; }
}
.cta--card .cta__title { font-family: var(--font-head); font-size: 1.2rem; font-weight: 700; line-height: 1.3; }

.pager { display: grid; gap: 1rem; }
@media (min-width: 768px) {
  .pager { grid-template-columns: 1fr 1fr; }
}
.pager__link {
  display: grid;
  gap: .25rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-s);
  color: var(--c-ink);
  text-decoration: none;
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}
.pager__link:hover { border-color: var(--c-ink); color: var(--c-ink); transform: translateY(-2px); }
.pager__link--next { text-align: right; }
.pager__label { font-size: .85rem; font-weight: 600; color: var(--c-muted); }
.pager__title { font-family: var(--font-head); font-size: 1.1rem; font-weight: 600; }

/* --- Events -------------------------------------------------------------- */

.events-intro { max-width: 62rem; margin-inline: auto; text-align: center; }
.events-intro__accent { font-family: var(--font-head); font-weight: 600; color: var(--c-ink); }
.event-card .gallery-item { aspect-ratio: 484 / 419; }

/* --- Articles ------------------------------------------------------------ */

.article-meta { margin: 0; font-size: .9rem; font-weight: 500; color: var(--c-muted); }
.article .article__hero { width: 100%; margin: 0 0 2rem; border-radius: var(--radius-l); box-shadow: var(--shadow-m); }
.article__figure { margin: 2.5rem 0; }
.article .article__figure img { width: auto; max-height: 36rem; margin: 0 auto; }
.article__figure figcaption { margin-top: .75rem; font-size: .95rem; font-style: italic; color: var(--c-muted); text-align: center; }
.article__byline { font-weight: 600; color: var(--c-ink); }
.article .cta { margin-top: 2.5rem; }

/* --- Contact ------------------------------------------------------------- */

.info-card {
  padding: 2rem 1.5rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-bg);
  box-shadow: var(--shadow-s);
  text-align: center;
}
.info-card__icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--icon-bg, var(--c-blue));
  color: var(--c-ink);
}
.info-card:nth-child(2) { --icon-bg: var(--c-yellow); }
.info-card:nth-child(3) { --icon-bg: var(--c-green); }
.info-card__icon svg { width: 26px; height: 26px; }
.info-card h2 { margin-bottom: .35rem; font-size: 1.2rem; }
.info-card p { margin: 0; }
.info-card a { font-weight: 600; color: var(--c-ink); }

.contact-card {
  max-width: 48rem;
  margin-inline: auto;
  padding: clamp(1.5rem, 1rem + 3vw, 3rem);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-l);
  background: var(--c-bg);
  box-shadow: var(--shadow-m);
}
.contact-card__head { margin-bottom: 1.75rem; text-align: center; }
.form__row { display: grid; gap: 1.25rem; }
@media (min-width: 640px) {
  .form__row { grid-template-columns: 1fr 1fr; }
}
.form .btn { justify-self: start; }
.btn:disabled { opacity: .7; cursor: progress; transform: none; }

.map { height: clamp(20rem, 40vw, 28rem); background: var(--c-bg-soft); }
.map iframe { display: block; width: 100%; height: 100%; border: 0; }

/* --- Motion -------------------------------------------------------------- */

html.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
html.js .reveal.is-visible { opacity: 1; transform: none; }

/* 5. Utilities ============================================================= */

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.text-center { text-align: center; }
.stack > * + * { margin-top: var(--stack-space, 1rem); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cluster-space, .75rem); }
.cluster--center { justify-content: center; }