:root {
  --bg: #10110f;
  --bg-soft: #161815;
  --surface: #1b1e1a;
  --surface-2: #22251f;
  --paper: #f1f0e9;
  --paper-soft: #d7d7cc;
  --muted: #a4a79d;
  --line: rgba(241, 240, 233, .15);
  --line-strong: rgba(241, 240, 233, .28);
  --accent: #96bd62;
  --accent-2: #b9d992;
  --accent-dark: #6f9444;
  --ink: #121410;
  --radius: 26px;
  --shadow: 0 28px 80px rgba(0, 0, 0, .35);
  --shell: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--paper);
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .14;
  z-index: 50;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
::selection { background: var(--accent); color: var(--ink); }

.shell { width: var(--shell); margin-inline: auto; }
.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; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 12px 18px; background: var(--paper); color: var(--ink); border-radius: 8px; text-decoration: none; transition: top .2s; }
.skip-link:focus { top: 16px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s, backdrop-filter .25s;
}
.site-header.is-scrolled { background: rgba(16, 17, 15, .88); border-color: var(--line); backdrop-filter: blur(18px); }
.header-inner { min-height: 86px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-size: 1.08rem; font-weight: 600; letter-spacing: -.025em; }
.brand img { width: 45px; height: 45px; object-fit: cover; border-radius: 10px; border: 1px solid rgba(255,255,255,.18); }
.brand strong { color: var(--accent); }
.main-nav { display: flex; justify-content: center; align-items: center; gap: clamp(18px, 2.4vw, 34px); }
.main-nav a { color: var(--paper-soft); text-decoration: none; font-size: .88rem; transition: color .2s; }
.main-nav a:hover, .main-nav a:focus-visible { color: var(--paper); }
.menu-toggle { display: none; background: transparent; color: inherit; border: 0; padding: 8px; }
.menu-toggle > span:not(.sr-only) { display: block; width: 25px; height: 1px; background: currentColor; margin: 6px 0; transition: transform .2s, opacity .2s; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 54px; padding: 0 23px; border: 1px solid var(--accent); border-radius: 999px; background: var(--accent); color: var(--ink); text-decoration: none; font-size: .92rem; font-weight: 700; transition: transform .2s, background .2s, border-color .2s; }
.button:hover, .button:focus-visible { transform: translateY(-2px); background: var(--accent-2); border-color: var(--accent-2); }
.button-small { min-height: 43px; padding-inline: 18px; font-size: .82rem; }
.button-light { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.button-light:hover, .button-light:focus-visible { background: white; border-color: white; }
.text-link { display: inline-flex; gap: 10px; align-items: center; color: var(--paper); text-decoration: none; font-weight: 650; font-size: .94rem; }
.text-link span { color: var(--accent); font-size: 1.3em; transition: transform .2s; }
.text-link:hover span, .text-link:focus-visible span { transform: translate(3px, 3px); }
.text-link-light span { color: var(--paper); }

.hero { position: relative; min-height: 100vh; padding: 154px 0 64px; overflow: clip; }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--line); }
.hero-glow { position: absolute; width: 720px; height: 720px; border-radius: 50%; right: -220px; top: -250px; background: radial-gradient(circle, rgba(150,189,98,.13), transparent 67%); filter: blur(18px); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(430px, .96fr); gap: clamp(44px, 7vw, 105px); align-items: center; }
.eyebrow, .section-label { margin: 0 0 24px; color: var(--accent); font-size: .74rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(3.4rem, 7vw, 7.25rem); line-height: .94; letter-spacing: -.072em; font-weight: 680; }
.hero h1 em { color: var(--accent); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.hero-lead { max-width: 680px; margin: 34px 0 0; color: var(--paper-soft); font-size: clamp(1.05rem, 1.5vw, 1.28rem); line-height: 1.65; }
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.availability { margin: 22px 0 0; color: var(--muted); font-size: .78rem; }

.hero-visual { position: relative; min-height: 585px; }
.chalk-card { position: relative; min-height: 585px; border: 1px solid rgba(255,255,255,.12); border-radius: 38px; overflow: hidden; background: radial-gradient(circle at 50% 46%, rgba(60,65,55,.42), transparent 40%), linear-gradient(145deg, #1b1d1a, #0c0d0c); box-shadow: var(--shadow); transform: rotate(1.3deg); }
.chalk-card::after { content: ""; position: absolute; inset: 14px; border: 1px solid rgba(255,255,255,.055); border-radius: 28px; pointer-events: none; }
.chalk-noise { position: absolute; inset: 0; opacity: .38; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.5' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E"); }
.orbit { position: absolute; left: 50%; top: 48%; border: 1px dashed rgba(241,240,233,.2); border-radius: 50%; transform: translate(-50%,-50%); }
.orbit-one { width: 73%; aspect-ratio: 1; }
.orbit-two { width: 52%; aspect-ratio: 1; border-color: rgba(150,189,98,.22); }
.visual-brand { position: absolute; left: 50%; top: 48%; transform: translate(-50%, -50%) rotate(-1.3deg); text-align: center; z-index: 2; }
.chalk-c { display: block; color: #f4f3eb; font-family: Georgia, serif; font-size: 8.7rem; line-height: .72; font-style: italic; text-shadow: 1px 0 rgba(255,255,255,.5), -1px 1px rgba(255,255,255,.32); }
.visual-wordmark { display: block; margin-top: 18px; font-size: 1.7rem; font-weight: 650; letter-spacing: -.04em; white-space: nowrap; }
.visual-wordmark strong { color: var(--accent); }
.feature-node { position: absolute; z-index: 3; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--paper-soft); font-size: .72rem; font-weight: 650; text-align: center; transform: rotate(-1.3deg); }
.node-icon { width: 63px; height: 63px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; background: rgba(10,11,10,.76); box-shadow: 0 10px 30px rgba(0,0,0,.2); }
.node-icon svg { width: 29px; fill: none; stroke: currentColor; stroke-width: 1.35; stroke-linecap: round; stroke-linejoin: round; }
.node-courses { left: 42%; top: 7%; color: #9bc46e; }
.node-content { right: 8%; top: 23%; color: #83b9dd; }
.node-tests { right: 5%; bottom: 18%; color: #e2b95d; }
.node-grades { left: 42%; bottom: 6%; color: #8ed2cf; }
.node-messages { left: 5%; bottom: 20%; color: #b7a1df; }
.node-shield { left: 7%; top: 22%; color: #e2917d; }
.chalk-caption { position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%) rotate(-1.3deg); width: 100%; color: rgba(241,240,233,.5); font-family: Georgia, serif; font-style: italic; font-size: .8rem; text-align: center; }
.hero-facts { position: relative; margin-top: 80px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-facts > div { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; padding: 24px clamp(16px, 3vw, 36px); border-right: 1px solid var(--line); }
.hero-facts > div:last-child { border-right: 0; }
.hero-facts strong { color: var(--accent); font-family: Georgia, serif; font-weight: 400; font-size: 1.28rem; }
.hero-facts span { color: var(--paper-soft); font-size: .8rem; line-height: 1.4; }

.section { position: relative; padding: clamp(96px, 11vw, 170px) 0; }
.section + .section { border-top: 1px solid var(--line); }
.two-column-heading { display: grid; grid-template-columns: .44fr 1.56fr; gap: clamp(36px, 8vw, 120px); align-items: start; }
.two-column-heading h2, .mentor-support h2, .institution h2, .proctoring h2, .ownership h2, .faq h2, .cta h2 { margin: 0; font-size: clamp(2.55rem, 5vw, 5.1rem); line-height: 1.02; letter-spacing: -.06em; font-weight: 620; }
.two-column-heading > div > p, .institution-copy > p, .proctoring-copy > p { max-width: 770px; color: var(--paper-soft); font-size: 1.1rem; }
.feature-grid { margin-top: 84px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-card { position: relative; min-height: 340px; padding: 32px 28px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .25s, transform .25s; }
.feature-card:hover { background: rgba(255,255,255,.025); transform: translateY(-4px); }
.card-number { color: var(--muted); font-family: Georgia, serif; font-size: .8rem; }
.card-icon { width: 52px; height: 52px; display: grid; place-items: center; margin: 50px 0 34px; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--accent); }
.card-icon svg { width: 24px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.feature-card h3 { margin: 0 0 15px; font-size: 1.24rem; letter-spacing: -.03em; }
.feature-card p { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.65; }


.mentor-support { overflow: hidden; background: linear-gradient(145deg, #e9eadf, #f4f2e9); color: var(--ink); }
.mentor-support::before { content: ""; position: absolute; width: 620px; height: 620px; right: -220px; top: -250px; border-radius: 50%; background: radial-gradient(circle, rgba(111,148,68,.18), transparent 67%); }
.mentor-support .section-label { color: var(--accent-dark); }
.mentor-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(55px, 9vw, 135px); align-items: center; }
.mentor-copy > p { max-width: 720px; color: #555a50; font-size: 1.02rem; }
.mentor-copy .mentor-lead { margin-top: 30px; color: #30342e; font-size: 1.18rem; }
.mentor-support .check-list { margin-top: 36px; }
.mentor-support .check-list li { border-color: rgba(18,20,16,.18); color: #555a50; }
.mentor-support .check-list li:last-child { border-color: rgba(18,20,16,.18); }
.mentor-support .check-list li::before { color: var(--accent-dark); }
.mentor-visual { position: relative; min-height: 610px; display: grid; place-items: center; }
.mentor-visual::before { content: ""; position: absolute; width: 68%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(111,148,68,.15), transparent 67%); filter: blur(5px); }
.mentor-orbit { position: absolute; border: 1px dashed rgba(18,20,16,.23); border-radius: 50%; }
.orbit-large { width: 470px; height: 470px; }
.orbit-small { width: 310px; height: 310px; border-color: rgba(111,148,68,.42); }
.mentor-core { position: relative; z-index: 3; width: 225px; height: 225px; padding: 30px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 10px; border-radius: 50%; background: var(--bg); color: var(--paper); text-align: center; box-shadow: 0 30px 70px rgba(18,20,16,.25); }
.mentor-play { width: 62px; height: 62px; display: grid; place-items: center; border-radius: 50%; background: var(--accent); color: var(--ink); }
.mentor-play svg { width: 28px; fill: currentColor; }
.mentor-core strong { max-width: 150px; font-size: 1rem; line-height: 1.3; }
.mentor-core small { max-width: 145px; color: var(--muted); font-size: .68rem; line-height: 1.45; }
.mentor-message { position: absolute; z-index: 4; min-width: 230px; display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: center; padding: 15px 18px; border: 1px solid rgba(18,20,16,.13); border-radius: 16px; background: rgba(255,255,255,.82); box-shadow: 0 20px 55px rgba(18,20,16,.13); backdrop-filter: blur(12px); }
.mentor-message > span { color: var(--accent-dark); font-family: Georgia, serif; font-size: .88rem; }
.mentor-message strong, .mentor-message small { display: block; }
.mentor-message strong { color: var(--ink); font-size: .83rem; }
.mentor-message small { margin-top: 2px; color: #666b61; font-size: .67rem; }
.mentor-message-one { left: 0; top: 17%; }
.mentor-message-two { right: -3%; top: 39%; }
.mentor-message-three { left: 5%; bottom: 12%; }
.mentor-pulse { position: absolute; z-index: 2; width: 9px; height: 9px; border-radius: 50%; background: var(--accent-dark); box-shadow: 0 0 0 8px rgba(111,148,68,.12); }
.pulse-one { left: 20%; top: 32%; }
.pulse-two { right: 17%; top: 29%; }
.pulse-three { right: 23%; bottom: 19%; }

.institution { background: #f0efe7; color: var(--ink); }
.institution .section-label { color: var(--accent-dark); }
.institution-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(50px, 10vw, 150px); }
.institution-copy { position: sticky; top: 135px; align-self: start; }
.institution-copy > p { color: #51554c; }
.institution .text-link { margin-top: 24px; color: var(--ink); }
.institution-list { border-top: 1px solid rgba(18,20,16,.18); }
.institution-list article { display: grid; grid-template-columns: 55px 1fr; gap: 22px; padding: 31px 0 34px; border-bottom: 1px solid rgba(18,20,16,.18); }
.institution-list article > span { color: var(--accent-dark); font-family: Georgia, serif; }
.institution-list h3 { margin: 0 0 10px; font-size: 1.25rem; letter-spacing: -.025em; }
.institution-list p { margin: 0; color: #62665d; font-size: .92rem; }

.proctoring { overflow: hidden; background: linear-gradient(180deg, #171916, #10110f); }
.proctoring-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 10vw, 130px); align-items: center; }
.proctoring-visual { position: relative; min-height: 570px; display: grid; place-items: center; }
.proctoring-visual::before, .proctoring-visual::after { content: ""; position: absolute; border: 1px dashed rgba(150,189,98,.24); border-radius: 50%; }
.proctoring-visual::before { width: 430px; height: 430px; }
.proctoring-visual::after { width: 310px; height: 310px; }
.shield-mark { position: relative; width: 180px; color: var(--accent); z-index: 2; filter: drop-shadow(0 20px 40px rgba(0,0,0,.3)); }
.shield-mark svg { fill: rgba(150,189,98,.06); stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.signal { position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 8px rgba(150,189,98,.08); }
.signal-a { left: 12%; top: 21%; }.signal-b { right: 9%; top: 35%; }.signal-c { left: 18%; bottom: 15%; }
.security-note { position: absolute; padding: 11px 15px; border: 1px solid var(--line); border-radius: 999px; background: rgba(16,17,15,.86); color: var(--paper-soft); font-size: .73rem; box-shadow: 0 15px 40px rgba(0,0,0,.25); }
.note-one { left: 3%; top: 35%; }.note-two { right: 0; top: 18%; }.note-three { right: 5%; bottom: 20%; }
.proctoring-copy p { color: var(--paper-soft); }
.check-list { list-style: none; padding: 0; margin: 32px 0 0; }
.check-list li { position: relative; padding: 17px 0 17px 38px; border-top: 1px solid var(--line); color: var(--paper-soft); font-size: .92rem; }
.check-list li:last-child { border-bottom: 1px solid var(--line); }
.check-list li::before { content: "✓"; position: absolute; left: 5px; color: var(--accent); font-weight: 700; }
.fine-print { margin-top: 22px; color: var(--muted) !important; font-size: .72rem !important; }

.roles { background: #141613; }
.role-grid { margin-top: 78px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.role-card { min-height: 490px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(160deg, rgba(255,255,255,.025), rgba(255,255,255,.005)); }
.role-top { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: .68rem; letter-spacing: .11em; }
.role-top strong { color: var(--accent); font-family: Georgia, serif; font-size: 1rem; font-weight: 400; }
.role-card h3 { margin: 100px 0 20px; font-size: 2rem; letter-spacing: -.045em; }
.role-card > p { color: var(--paper-soft); font-size: .9rem; }
.role-card ul { margin: 30px 0 0; padding: 0; list-style: none; }
.role-card li { padding: 10px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .78rem; }

.ownership { background: var(--accent); color: var(--ink); }
.ownership .section-label { color: rgba(18,20,16,.65); }
.ownership-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(60px, 11vw, 160px); }
.ownership-details > p { margin: 0 0 45px; font-size: 1.15rem; color: rgba(18,20,16,.77); }
.ownership-points { border-top: 1px solid rgba(18,20,16,.25); }
.ownership-points > div { display: grid; grid-template-columns: 145px 1fr; gap: 24px; padding: 23px 0; border-bottom: 1px solid rgba(18,20,16,.25); }
.ownership-points strong { font-size: .87rem; }
.ownership-points span { color: rgba(18,20,16,.7); font-size: .85rem; }

.process-line { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 85px; border-top: 1px solid var(--line); }
.process-line article { padding: 30px 28px 10px 0; }
.process-line article::before { content: ""; position: absolute; top: -5px; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.process-line span { color: var(--accent); font-family: Georgia, serif; }
.process-line h3 { margin: 54px 0 15px; font-size: 1.25rem; }
.process-line p { margin: 0; color: var(--muted); font-size: .82rem; padding-right: 20px; }

.faq { background: #f0efe7; color: var(--ink); }
.faq .section-label { color: var(--accent-dark); }
.faq-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(60px, 10vw, 150px); }
.accordion { border-top: 1px solid rgba(18,20,16,.2); }
.accordion-item { border-bottom: 1px solid rgba(18,20,16,.2); }
.accordion-item button { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 26px 0; border: 0; background: transparent; color: inherit; text-align: left; cursor: pointer; font-weight: 650; }
.accordion-item .plus { color: var(--accent-dark); font-size: 1.7rem; font-weight: 300; transition: transform .25s; }
.accordion-item button[aria-expanded="true"] .plus { transform: rotate(45deg); }
.accordion-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s ease; }
.accordion-panel > p { min-height: 0; overflow: hidden; margin: 0; color: #5e6258; font-size: .9rem; }
.accordion-item.is-open .accordion-panel { grid-template-rows: 1fr; }
.accordion-item.is-open .accordion-panel > p { padding: 0 40px 26px 0; }

.cta { position: relative; padding: clamp(90px, 12vw, 170px) 0; background: #1e211c; overflow: hidden; }
.cta::before { content: "C"; position: absolute; right: -2vw; bottom: -18vw; color: rgba(255,255,255,.025); font-family: Georgia, serif; font-size: 55vw; line-height: 1; font-style: italic; }
.cta-inner { position: relative; max-width: 990px; margin: 0 auto; text-align: center; }
.cta h2 { max-width: 930px; margin-inline: auto; }
.cta-inner > p:not(.section-label) { max-width: 760px; margin: 30px auto 0; color: var(--paper-soft); }
.cta-actions { margin-top: 40px; display: flex; justify-content: center; align-items: center; gap: 28px; flex-wrap: wrap; }

.site-footer { padding: 42px 0; border-top: 1px solid var(--line); }
.footer-inner { display: grid; grid-template-columns: auto 1fr auto; gap: 30px; align-items: center; }
.footer-inner > p { margin: 0; color: var(--muted); font-size: .74rem; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: var(--paper-soft); text-decoration: none; font-size: .74rem; }
.copyright { grid-column: 1 / -1; padding-top: 24px; border-top: 1px solid var(--line); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1080px) {
  .header-cta { display: none; }
  .header-inner { grid-template-columns: auto 1fr; }
  .main-nav { justify-content: flex-end; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 830px; }
  .hero-visual { width: min(690px, 100%); margin: 15px auto 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .mentor-grid { grid-template-columns: 1fr; }
  .mentor-copy { max-width: 820px; }
  .mentor-visual { width: min(680px, 100%); margin-inline: auto; }
  .institution-grid, .proctoring-grid, .ownership-grid { gap: 65px; }
  .role-card { min-height: 520px; }
  .footer-inner { grid-template-columns: auto 1fr; }
  .footer-links { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  :root { --shell: min(100% - 34px, 700px); }
  body { font-size: 16px; }
  .site-header { background: rgba(16,17,15,.92); backdrop-filter: blur(18px); }
  .header-inner { min-height: 75px; display: flex; justify-content: space-between; }
  .menu-toggle { display: block; z-index: 3; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .main-nav { position: fixed; inset: 75px 0 auto 0; display: grid; gap: 0; padding: 12px 17px 26px; background: rgba(16,17,15,.98); border-bottom: 1px solid var(--line); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: transform .25s, opacity .25s; }
  .main-nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 15px 8px; border-bottom: 1px solid var(--line); font-size: .95rem; }
  .hero { padding-top: 125px; }
  .hero h1 { font-size: clamp(3.2rem, 13vw, 5.7rem); }
  .hero-visual { min-height: 510px; }
  .chalk-card { min-height: 510px; }
  .node-icon { width: 54px; height: 54px; }
  .node-icon svg { width: 24px; }
  .chalk-c { font-size: 7.2rem; }
  .visual-wordmark { font-size: 1.4rem; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .hero-facts > div:last-child { border-bottom: 0; }
  .two-column-heading, .mentor-grid, .institution-grid, .proctoring-grid, .ownership-grid, .faq-grid { grid-template-columns: 1fr; }
  .institution-copy { position: static; }
  .role-grid { grid-template-columns: 1fr; }
  .role-card { min-height: auto; }
  .role-card h3 { margin-top: 65px; }
  .process-line { grid-template-columns: repeat(2, 1fr); row-gap: 42px; }
  .process-line article:nth-child(3)::before, .process-line article:nth-child(4)::before { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { grid-column: auto; flex-wrap: wrap; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 26px); --radius: 20px; }
  .brand span { font-size: .98rem; }
  .brand img { width: 40px; height: 40px; border-radius: 10px; }
  .hero { padding-bottom: 42px; }
  .hero h1 { font-size: clamp(3.05rem, 15vw, 4.5rem); letter-spacing: -.068em; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 19px; }
  .button { width: 100%; }
  .hero-visual { min-height: 450px; }
  .chalk-card { min-height: 450px; border-radius: 26px; }
  .orbit-one { width: 82%; }.orbit-two { width: 58%; }
  .chalk-c { font-size: 5.5rem; }
  .visual-wordmark { margin-top: 14px; font-size: 1.13rem; }
  .feature-node { font-size: .61rem; }
  .node-icon { width: 44px; height: 44px; }
  .node-icon svg { width: 20px; }
  .node-courses { top: 8%; left: 40%; }
  .node-content { right: 3%; top: 24%; }
  .node-tests { right: 3%; bottom: 20%; }
  .node-grades { bottom: 7%; left: 40%; }
  .node-messages { left: 2%; bottom: 22%; }
  .node-shield { left: 3%; top: 24%; }
  .chalk-caption { display: none; }
  .section { padding: 92px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .card-icon { margin: 42px 0 28px; }
  .mentor-visual { min-height: 520px; transform: scale(.88); margin: -22px auto; }
  .mentor-message { min-width: 210px; }
  .mentor-message-one { left: -4%; }
  .mentor-message-two { right: -5%; }
  .mentor-message-three { left: 0; }
  .proctoring-visual { min-height: 410px; transform: scale(.87); margin: -35px 0; }
  .security-note { font-size: .65rem; }
  .note-one { left: -4%; }.note-two { right: -4%; }.note-three { right: -3%; }
  .ownership-points > div { grid-template-columns: 1fr; gap: 8px; }
  .process-line { grid-template-columns: 1fr; border-top: 0; }
  .process-line article { border-top: 1px solid var(--line); }
  .process-line article::before { display: block !important; }
  .cta-actions { align-items: flex-start; flex-direction: column; }
  .cta .button { width: 100%; }
}