:root {
  --ink: #07100b;
  --paper: #f3f2ec;
  --muted: #656a66;
  --line: rgba(7, 16, 11, .14);
  --lime: #a8f51a;
  --lime-dark: #76b500;
  --white: #fff;
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
.page-top-anchor { display: block; width: 0; height: 0; overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.site-header {
  position: fixed;
  z-index: 20;
  inset: 0 0 auto;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(7, 16, 11, .9);
  border-color: rgba(255, 255, 255, .1);
  backdrop-filter: blur(18px);
}
.nav-shell {
  width: min(1320px, calc(100% - 64px));
  height: 92px;
  margin: auto;
  display: flex;
  align-items: center;
}
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  font-family: "Space Grotesk", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.7px;
}
.brand { color: var(--white); }
.brand-mark {
  margin-left: 6px;
  padding: 4px 7px 3px;
  color: var(--ink);
  background: var(--lime);
  letter-spacing: 1px;
}
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 36px; }
.site-nav a {
  position: relative;
  color: rgba(255,255,255,.72);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
}
.site-nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -8px;
  height: 2px; background: var(--lime); transition: right .25s;
}
.site-nav a:hover, .site-nav a.active { color: white; }
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }
.site-nav .nav-cta {
  padding: 13px 18px; color: var(--ink); background: var(--lime);
  border-radius: 999px;
}
.menu-toggle { display: none; }

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  align-items: end;
  color: var(--white);
  background: var(--ink);
}
.hero-slides, .hero-slide, .hero-shade { position: absolute; inset: 0; }
.hero-slide {
  opacity: 0;
  background-position: center;
  background-size: cover;
  transform: scale(1.035);
  transition: opacity .9s ease, transform 7s ease;
}
.hero-slide.active { opacity: 1; transform: scale(1); }
.hero-slide:nth-child(2) { background-position: center; }
.hero-shade {
  background:
    linear-gradient(90deg, rgba(1,7,4,.9) 0%, rgba(1,7,4,.55) 44%, rgba(1,7,4,.08) 72%),
    linear-gradient(0deg, rgba(1,7,4,.72), transparent 48%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(1320px, calc(100% - 64px));
  margin: 0 auto;
  padding: 170px 0 115px;
}
.eyebrow {
  display: flex; align-items: center; gap: 11px; margin: 0 0 24px;
  font-size: 11px; font-weight: 800; letter-spacing: 2.2px; text-transform: uppercase;
}
.eyebrow span { width: 34px; height: 2px; background: var(--lime); }
.hero h1, .section-heading h2, .manifesto h2 {
  margin: 0;
  font: 600 clamp(54px, 7.3vw, 112px)/.9 "Space Grotesk", sans-serif;
  letter-spacing: -5px;
}
em { color: var(--lime); font-style: normal; }
.hero-copy {
  width: min(560px, 100%);
  margin: 35px 0 38px;
  color: rgba(255,255,255,.72);
  font-size: 17px;
  line-height: 1.75;
}
.hero-actions { display: flex; gap: 12px; align-items: center; }
.button {
  min-height: 54px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .4px;
  cursor: pointer;
  transition: transform .2s, background .2s, color .2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--ink); background: var(--lime); }
.button-primary:hover { background: white; }
.button-ghost { color: white; background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.25); }
.button-ghost:hover { background: white; color: var(--ink); }
.slide-nav {
  position: absolute;
  z-index: 3;
  right: max(32px, calc((100% - 1320px) / 2));
  bottom: 56px;
  display: flex;
  gap: 8px;
}
.slide-dot {
  width: 42px; height: 4px; padding: 0; border: 0;
  background: rgba(255,255,255,.35); cursor: pointer; transition: background .2s;
}
.slide-dot.active { background: var(--lime); }
.scroll-cue {
  position: absolute; z-index: 3; right: 50px; top: 50%;
  display: flex; align-items: center; gap: 14px; transform: rotate(90deg);
  transform-origin: right; color: rgba(255,255,255,.5);
  font-size: 10px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase;
}
.scroll-cue i { display: block; width: 52px; height: 1px; background: currentColor; }

.section { width: min(1320px, calc(100% - 64px)); margin: auto; padding: 130px 0 145px; }
.section-heading {
  display: grid;
  grid-template-columns: 1.7fr .7fr;
  align-items: end;
  gap: 80px;
  margin-bottom: 72px;
}
.eyebrow.dark { color: var(--muted); }
.section-heading h2 {
  font-size: clamp(46px, 6vw, 86px);
  line-height: .98;
}
.section-heading h2 em { color: var(--lime-dark); }
.section-heading > p {
  margin: 0 0 8px; color: var(--muted); font-size: 16px; line-height: 1.8;
}
.filters {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0 28px;
  margin-bottom: 30px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}
.filters::-webkit-scrollbar { display: none; }
.filter {
  flex: 0 0 auto;
  padding: 12px 17px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.filter sup { margin-left: 3px; color: #929792; font-size: 8px; }
.filter:hover, .filter.active { color: white; background: var(--ink); }
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 55px 24px;
}
.course-card { min-width: 0; transition: opacity .25s, transform .25s; }
.course-card.hidden { display: none; }
.card-image {
  position: relative;
  aspect-ratio: 1.38 / 1;
  overflow: hidden;
  display: block;
  border-radius: var(--radius);
  background: #d9d9d3;
}
.card-image::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 62%, rgba(0,0,0,.32));
}
.card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.course-card:hover .card-image img { transform: scale(1.045); }
.card-arrow {
  position: absolute; z-index: 2; right: 18px; bottom: 18px;
  width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 50%; color: var(--ink); background: var(--lime);
  font-size: 20px; transition: transform .25s, background .25s;
}
.course-card:hover .card-arrow { transform: rotate(10deg); background: white; }
.card-body { padding: 22px 5px 0; }
.card-meta {
  display: flex; justify-content: space-between; margin: 0 0 14px;
  color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: 1.2px;
  text-transform: uppercase;
}
.card-meta b { color: var(--lime-dark); }
.card-body h3 {
  min-height: 58px;
  margin: 0 0 12px;
  font: 600 24px/1.2 "Space Grotesk", sans-serif;
  letter-spacing: -.6px;
}
.card-body h3 a { transition: color .2s; }
.card-body h3 a:hover { color: var(--lime-dark); }
.card-body > p:last-child { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.video-section {
  padding: 130px 0 145px;
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 90% 10%, rgba(168,245,26,.12), transparent 32%),
    var(--ink);
}
.video-shell { width: min(1320px, calc(100% - 64px)); margin: auto; }
.video-heading {
  display: grid;
  grid-template-columns: 1.55fr .7fr;
  align-items: end;
  gap: 80px;
  margin-bottom: 65px;
}
.video-heading h2 {
  margin: 0;
  font: 600 clamp(46px, 5.7vw, 82px)/.96 "Space Grotesk", sans-serif;
  letter-spacing: -4px;
}
.video-intro { padding-bottom: 5px; }
.video-intro p {
  margin: 0 0 28px;
  color: rgba(255,255,255,.6);
  font-size: 15px;
  line-height: 1.8;
}
.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--lime);
  color: white;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .5px;
  transition: color .2s, gap .2s;
}
.channel-link:hover { gap: 24px; color: var(--lime); }
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.video-card {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  background: rgba(255,255,255,.045);
}
.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
}
.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-meta { padding: 25px 27px 28px; }
.video-meta > span {
  color: var(--lime);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.6px;
  text-transform: uppercase;
}
.video-meta h3 {
  max-width: 540px;
  margin: 9px 0 0;
  font: 600 22px/1.3 "Space Grotesk", sans-serif;
  letter-spacing: -.4px;
}
.video-meta h3 b { color: rgba(255,255,255,.45); font-weight: 500; }

.manifesto {
  min-height: 660px;
  padding: 110px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: white;
  background:
    radial-gradient(circle at 50% 130%, rgba(168,245,26,.23), transparent 45%),
    var(--ink);
}
.manifesto > p {
  margin: 0 0 28px; color: rgba(255,255,255,.55);
  font-size: 11px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase;
}
.manifesto h2 { font-size: clamp(52px, 7vw, 102px); }
.manifesto .button { margin-top: 45px; }
.contact-section {
  padding: 120px 32px;
  color: var(--ink);
  background:
    radial-gradient(circle at 4% 0%, rgba(168,245,26,.2), transparent 24rem),
    #f3f1e9;
}
.contact-shell {
  width: min(1180px, 100%);
  margin: auto;
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(500px, 1.15fr);
  gap: clamp(60px, 9vw, 130px);
  align-items: start;
}
.contact-shell > *, .contact-form, .contact-field { min-width: 0; }
.contact-heading { overflow-wrap: anywhere; }
.contact-heading h2 {
  max-width: 620px;
  margin: 24px 0 28px;
  font-size: clamp(45px, 5vw, 76px);
  letter-spacing: -4px;
}
.contact-heading > p:not(.eyebrow) { max-width: 520px; margin: 0; color: #59605a; font-size: 16px; line-height: 1.85; }
.contact-detail { margin-top: 48px; padding-top: 22px; border-top: 1px solid rgba(7,16,11,.14); }
.contact-detail span { display: block; color: #697169; font-size: 10px; font-weight: 800; letter-spacing: 1.8px; text-transform: uppercase; }
.contact-detail strong { display: block; margin-top: 8px; font: 600 18px/1.4 "Space Grotesk", sans-serif; }
.contact-form {
  position: relative;
  width: 100%;
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 18px;
  border: 1px solid rgba(7,16,11,.1);
  border-radius: 28px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 30px 80px rgba(7,16,11,.08);
}
.contact-field-wide { grid-column: 1 / -1; }
.contact-field label { display: block; margin-bottom: 9px; font-size: 10px; font-weight: 800; letter-spacing: 1.4px; text-transform: uppercase; }
.contact-field input, .contact-field textarea {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(7,16,11,.22);
  border-radius: 0;
  padding: 12px 0 14px;
  color: var(--ink);
  background: transparent;
  font: 500 15px/1.6 "Manrope", sans-serif;
  outline: none;
  transition: border-color .2s;
}
.contact-field textarea { min-height: 135px; resize: vertical; }
.contact-field input:focus, .contact-field textarea:focus { border-color: #5b8700; }
.contact-field input::placeholder, .contact-field textarea::placeholder { color: #919891; }
.contact-honeypot { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.contact-submit { grid-column: 1 / -1; display: flex; align-items: flex-start; flex-direction: column; gap: 16px; }
.contact-submit > p { max-width: none; margin: 0; color: #747b74; font-size: 11px; line-height: 1.55; }
.contact-submit .button { flex: none; }
.contact-status { grid-column: 1 / -1; min-height: 20px; margin: -6px 0 0; font-size: 12px; font-weight: 700; }
.contact-status[data-state="success"] { color: #4f7900; }
.contact-status[data-state="error"] { color: #b42318; }
.contact-status[data-state="working"] { color: #5d655e; }
.site-footer { padding: 85px max(32px, calc((100% - 1320px) / 2)) 30px; color: white; background: #030704; }
.footer-brand { font-size: clamp(34px, 5vw, 72px); }
.footer-brand .brand-mark { margin-left: 13px; padding: 5px 12px; }
.footer-brand .dot { margin-left: 5px; color: rgba(255,255,255,.5); font-size: .5em; }
.footer-bottom {
  display: grid; grid-template-columns: 1fr 1fr auto;
  gap: 20px; margin-top: 80px; padding-top: 25px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.48); font-size: 11px; letter-spacing: .5px;
}
.footer-bottom p { margin: 0; }
.footer-bottom a { color: white; font-weight: 700; }

/* Página interna: Curso */
.course-page { background: var(--paper); }
.course-header {
  background: rgba(7, 16, 11, .88);
  border-color: rgba(255, 255, 255, .1);
  backdrop-filter: blur(18px);
}
.course-hero {
  position: relative;
  min-height: 790px;
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 72% 28%, rgba(168, 245, 26, .12), transparent 29%),
    linear-gradient(130deg, #07100b 0%, #0b1710 54%, #050a07 100%);
}
.course-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .14;
  background-image:
    linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(90deg, black, transparent 72%);
}
.course-hero-glow {
  position: absolute;
  width: 420px;
  height: 420px;
  right: -160px;
  bottom: -190px;
  border-radius: 50%;
  border: 80px solid rgba(168, 245, 26, .08);
}
.course-hero-shell {
  position: relative;
  z-index: 2;
  width: min(1320px, calc(100% - 64px));
  min-height: 790px;
  margin: auto;
  padding: 158px 0 78px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, .75fr);
  align-items: center;
  gap: clamp(55px, 8vw, 130px);
}
.course-back {
  display: inline-flex;
  margin-bottom: 45px;
  color: rgba(255,255,255,.58);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  transition: color .2s, transform .2s;
}
.course-back:hover { color: var(--lime); transform: translateX(-4px); }
.course-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.course-tags span {
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 999px;
  color: rgba(255,255,255,.72);
  background: rgba(255,255,255,.05);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}
.course-intro .eyebrow { margin-bottom: 28px; }
.course-intro h1 {
  max-width: 850px;
  margin: 0;
  font: 600 clamp(50px, 6.2vw, 92px)/.92 "Space Grotesk", sans-serif;
  letter-spacing: -4.5px;
}
.course-lead {
  max-width: 625px;
  margin: 30px 0 34px;
  color: rgba(255,255,255,.65);
  font-size: 16px;
  line-height: 1.75;
}
.course-primary-action { min-height: 60px; padding-inline: 28px; }
.external-note { margin: 13px 0 0 5px; color: rgba(255,255,255,.38); font-size: 10px; }
.course-cover {
  position: relative;
  margin: 0;
  aspect-ratio: .83 / 1;
  overflow: hidden;
  border-radius: 28px;
  box-shadow: 0 35px 90px rgba(0,0,0,.42);
  transform: rotate(1.4deg);
}
.course-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 52%, rgba(1,7,4,.82));
}
.course-cover img { width: 100%; height: 100%; object-fit: cover; }
.course-cover figcaption {
  position: absolute;
  z-index: 2;
  inset: auto 28px 27px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}
.course-cover figcaption span {
  color: rgba(255,255,255,.58);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.course-cover figcaption b { font: 600 17px "Space Grotesk", sans-serif; }
.course-content-section { padding: 125px 0 135px; }
.course-content-shell {
  width: min(1160px, calc(100% - 64px));
  margin: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: start;
  gap: clamp(65px, 10vw, 150px);
}
.course-description > h2 {
  margin: 0 0 50px;
  font: 600 clamp(43px, 5vw, 70px)/1 "Space Grotesk", sans-serif;
  letter-spacing: -3px;
}
.course-description > h2 em { color: var(--lime-dark); }
.course-description-text {
  color: #454b47;
  font-size: 17px;
  line-height: 1.95;
}
.course-description-text > *:first-child { margin-top: 0; }
.course-description-text > *:last-child { margin-bottom: 0; }
.course-description-text p { margin: 0 0 1.25em; }
.course-description-text h2, .course-description-text h3 {
  margin: 1.5em 0 .65em;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -1px;
}
.course-description-text h2 { font-size: 30px; }
.course-description-text h3 { font-size: 24px; }
.course-description-text ul, .course-description-text ol { margin: 1em 0 1.3em; padding-left: 1.5em; }
.course-description-text li { margin: .35em 0; }
.course-description-text blockquote { margin: 1.4em 0; padding-left: 1.2em; border-left: 3px solid var(--lime-dark); color: #626963; }
.course-description-text a { color: #4f7900; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.course-description-text pre { max-width: 100%; overflow-x: auto; padding: 18px; border-radius: 12px; background: #eaeae3; font: 500 14px/1.7 ui-monospace, SFMono-Regular, Consolas, monospace; }
.course-description-text hr { margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.course-summary {
  position: sticky;
  top: 120px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #eaeae3;
}
.course-summary-label {
  margin: 0 0 23px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.course-summary dl { margin: 0 0 25px; }
.course-summary dl div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.course-summary dt { color: var(--muted); font-size: 12px; }
.course-summary dd { margin: 0; font-size: 12px; font-weight: 800; text-align: right; }
.button-dark { width: 100%; color: white; background: var(--ink); }
.button-dark:hover { color: var(--ink); background: var(--lime); }
.course-summary small { display: block; margin-top: 17px; color: var(--muted); font-size: 10px; line-height: 1.65; }
.related-courses-section {
  width: min(1320px, calc(100% - 64px));
  margin: auto;
  padding: 115px 0 130px;
  border-top: 1px solid var(--line);
}
.related-heading {
  display: grid;
  grid-template-columns: 1.45fr .55fr;
  align-items: end;
  gap: 80px;
  margin-bottom: 62px;
}
.related-heading h2 {
  margin: 0;
  font: 600 clamp(44px, 5.4vw, 76px)/.98 "Space Grotesk", sans-serif;
  letter-spacing: -3.5px;
}
.related-heading h2 em { color: var(--lime-dark); }
.related-heading > p {
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.related-course-grid .card-meta span {
  max-width: 72%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.course-next-step {
  min-height: 560px;
  padding: 95px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  background:
    radial-gradient(circle at 50% 120%, rgba(168,245,26,.2), transparent 43%),
    var(--ink);
}
.course-next-step > p {
  margin: 0 0 25px;
  color: rgba(255,255,255,.48);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.8px;
  text-transform: uppercase;
}
.course-next-step h2 {
  margin: 0;
  font: 600 clamp(45px, 6vw, 82px)/.98 "Space Grotesk", sans-serif;
  letter-spacing: -4px;
}
.course-next-step .button { margin-top: 40px; }

/* Página interna: Institucional */
.institutional-page { background: var(--paper); }
.institutional-header {
  background: rgba(7, 16, 11, .92);
  border-color: rgba(255, 255, 255, .1);
  backdrop-filter: blur(18px);
}
.institutional-nav { margin-left: auto; }
.institutional-nav a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.72);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color .2s;
}
.institutional-nav a:hover { color: var(--lime); }
.institutional-nav b { font: inherit; }
.institutional-hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  display: flex;
  align-items: end;
  color: white;
  background:
    radial-gradient(circle at 80% 20%, rgba(168,245,26,.13), transparent 30%),
    linear-gradient(135deg, #07100b 0%, #0b1710 58%, #050a07 100%);
}
.institutional-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .13;
  background-image:
    linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(90deg, black, transparent 75%);
}
.institutional-hero-shell {
  position: relative;
  z-index: 1;
  width: min(1160px, calc(100% - 64px));
  margin: 0 auto;
  padding: 190px 0 95px;
}
.institutional-hero h1 {
  max-width: 1040px;
  margin: 0;
  font: 600 clamp(58px, 8.5vw, 126px)/.88 "Space Grotesk", sans-serif;
  letter-spacing: -6px;
}
.institutional-hero-shell > p:last-child {
  max-width: 680px;
  margin: 38px 0 0;
  color: rgba(255,255,255,.68);
  font-size: 18px;
  line-height: 1.8;
}
.institutional-content-section { padding: 125px 0 145px; }
.institutional-content-shell {
  width: min(1160px, calc(100% - 64px));
  margin: auto;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  align-items: start;
  gap: clamp(60px, 10vw, 145px);
}
.institutional-aside {
  position: sticky;
  top: 125px;
  padding-top: 20px;
  border-top: 2px solid var(--lime-dark);
}
.institutional-aside span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.7px;
  text-transform: uppercase;
}
.institutional-aside strong {
  display: block;
  margin-top: 20px;
  font: 600 22px/1.35 "Space Grotesk", sans-serif;
}
.institutional-content {
  color: #454b47;
  font-size: 18px;
  line-height: 1.95;
}
.institutional-content > *:first-child { margin-top: 0; }
.institutional-content > *:last-child { margin-bottom: 0; }
.institutional-content p { margin: 0 0 1.35em; }
.institutional-content h2, .institutional-content h3 {
  margin: 1.55em 0 .65em;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 650;
  line-height: 1.18;
  letter-spacing: -1.5px;
}
.institutional-content h2 { font-size: clamp(38px, 5vw, 62px); }
.institutional-content h3 { font-size: 29px; }
.institutional-content ul, .institutional-content ol { margin: 1em 0 1.4em; padding-left: 1.5em; }
.institutional-content li { margin: .4em 0; }
.institutional-content blockquote { margin: 1.5em 0; padding: 4px 0 4px 1.25em; border-left: 3px solid var(--lime-dark); color: #626963; }
.institutional-content a { color: #4f7900; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.institutional-content pre { max-width: 100%; overflow-x: auto; padding: 18px; border-radius: 12px; background: #eaeae3; font: 500 14px/1.7 ui-monospace, SFMono-Regular, Consolas, monospace; }
.institutional-content hr { margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.institutional-return {
  min-height: 510px;
  padding: 90px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  background:
    radial-gradient(circle at 50% 120%, rgba(168,245,26,.2), transparent 43%),
    var(--ink);
}
.institutional-return > p {
  margin: 0 0 25px;
  color: rgba(255,255,255,.48);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.8px;
  text-transform: uppercase;
}
.institutional-return h2 {
  margin: 0;
  font: 600 clamp(43px, 5.8vw, 78px)/.98 "Space Grotesk", sans-serif;
  letter-spacing: -4px;
}
.institutional-return .button { margin-top: 40px; }

@media (max-width: 980px) {
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading, .video-heading { grid-template-columns: 1fr; gap: 30px; }
  .section-heading > p { max-width: 560px; }
  .video-intro { max-width: 560px; }
  .scroll-cue { display: none; }
  .course-hero-shell { grid-template-columns: minmax(0, 1fr) 330px; gap: 50px; }
  .course-content-shell { grid-template-columns: minmax(0, 1fr) 290px; gap: 55px; }
  .related-heading { grid-template-columns: 1fr; gap: 28px; }
  .related-heading > p { max-width: 560px; }
  .contact-shell { grid-template-columns: minmax(0, 1fr); gap: 55px; }
  .contact-heading > p:not(.eyebrow) { max-width: 650px; }
  .institutional-content-shell { grid-template-columns: 210px minmax(0, 1fr); gap: 60px; }
}

@media (max-width: 720px) {
  .nav-shell, .hero-content, .section, .video-shell { width: calc(100% - 36px); }
  .nav-shell { height: 74px; }
  .site-nav {
    position: fixed; inset: 0; z-index: -1;
    padding: 130px 28px 40px;
    flex-direction: column; align-items: flex-start; gap: 30px;
    opacity: 0; pointer-events: none;
    background: var(--ink);
    transition: opacity .25s;
  }
  .menu-open .site-nav { opacity: 1; pointer-events: auto; }
  .site-nav a { font: 600 32px/1 "Space Grotesk", sans-serif; text-transform: none; }
  .site-nav .nav-cta { margin-top: auto; font: 800 13px/1 "Manrope", sans-serif; text-transform: uppercase; }
  .menu-toggle {
    width: 44px; height: 44px; padding: 12px; margin-left: auto;
    display: flex; flex-direction: column; justify-content: center; gap: 7px;
    border: 0; border-radius: 50%; background: rgba(255,255,255,.1);
  }
  .menu-toggle span:not(.sr-only) { width: 100%; height: 2px; background: white; transition: transform .2s; }
  .menu-open .menu-toggle span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-open .menu-toggle span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }
  .hero-content { padding: 140px 0 90px; }
  .hero h1, .section-heading h2, .manifesto h2 { letter-spacing: -2.5px; }
  .hero-copy { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; max-width: 310px; }
  .slide-nav { right: 18px; bottom: 30px; }
  .section { padding: 95px 0; }
  .section-heading { margin-bottom: 45px; }
  .course-grid { grid-template-columns: 1fr; gap: 48px; }
  .card-body h3 { min-height: 0; font-size: 23px; }
  .video-section { padding: 95px 0; }
  .video-heading { margin-bottom: 44px; }
  .video-heading h2 { letter-spacing: -2.5px; }
  .video-grid { grid-template-columns: 1fr; gap: 20px; }
  .video-meta { padding: 20px 20px 23px; }
  .video-meta h3 { font-size: 19px; }
  .manifesto { min-height: 540px; }
  .contact-section { padding: 85px 18px; }
  .contact-heading h2 { letter-spacing: -2.5px; }
  .contact-form { grid-template-columns: 1fr; border-radius: 20px; }
  .contact-field-wide { grid-column: auto; }
  .contact-submit { grid-column: auto; align-items: stretch; flex-direction: column; }
  .contact-submit .button { width: 100%; }
  .contact-status { grid-column: auto; }
  .site-footer { padding-top: 65px; }
  .footer-bottom { grid-template-columns: 1fr; margin-top: 55px; }
  .course-hero-shell, .course-content-shell, .related-courses-section { width: calc(100% - 36px); }
  .course-hero-shell {
    min-height: auto;
    padding: 125px 0 70px;
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .course-back { margin-bottom: 32px; }
  .course-intro h1 { font-size: clamp(45px, 14vw, 66px); letter-spacing: -2.8px; }
  .course-lead { font-size: 15px; }
  .course-primary-action { width: 100%; }
  .external-note { text-align: center; }
  .course-cover { width: min(100%, 430px); margin: auto; transform: none; }
  .course-content-section { padding: 90px 0 100px; }
  .course-content-shell { grid-template-columns: 1fr; gap: 55px; }
  .course-description > h2 { margin-bottom: 35px; letter-spacing: -2px; }
  .course-description-text { font-size: 15px; line-height: 1.85; }
  .course-summary { position: static; padding: 25px; }
  .related-courses-section { padding: 85px 0 95px; }
  .related-heading { margin-bottom: 42px; }
  .related-heading h2 { letter-spacing: -2.3px; }
  .course-next-step { min-height: 500px; }
  .course-next-step h2 { letter-spacing: -2.5px; }
  .institutional-nav a { min-width: 44px; justify-content: center; font-size: 16px; }
  .institutional-nav b { display: none; }
  .institutional-hero-shell, .institutional-content-shell { width: calc(100% - 36px); }
  .institutional-hero { min-height: 570px; }
  .institutional-hero-shell { padding: 150px 0 70px; }
  .institutional-hero h1 { font-size: clamp(50px, 16vw, 76px); letter-spacing: -3px; }
  .institutional-hero-shell > p:last-child { margin-top: 28px; font-size: 15px; }
  .institutional-content-section { padding: 85px 0 100px; }
  .institutional-content-shell { grid-template-columns: 1fr; gap: 50px; }
  .institutional-aside { position: static; }
  .institutional-content { font-size: 16px; line-height: 1.85; }
  .institutional-content h2 { letter-spacing: -2px; }
  .institutional-return { min-height: 470px; }
  .institutional-return h2 { letter-spacing: -2.5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}