:root {
  --bg: #0a0a0c;
  --panel: #111116;
  --text: #f5f5f2;
  --muted: #a7a7ae;
  --accent: #d8ff38;
  --line: #27272e;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }

.site-header {
  height: 78px;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10,10,12,.92);
  backdrop-filter: blur(14px);
}
.logo { font-size: 17px; font-weight: 800; letter-spacing: .12em; }
.logo span, h2 span, h1 em { color: var(--accent); font-style: normal; }
nav { display: flex; gap: 30px; align-items: center; font-size: 14px; }
nav a:hover { color: var(--accent); }
.nav-button, .button {
  border: 1px solid var(--accent);
  padding: 11px 18px;
  display: inline-block;
  font-weight: 700;
  font-size: 13px;
  transition: .2s ease;
}
.nav-button:hover, .button.primary:hover {
  background: var(--accent);
  color: #000;
}
.menu-toggle { display: none; background: none; border: 0; color: white; font-size: 25px; }

.hero {
  min-height: 720px;
  max-width: var(--max);
  margin: auto;
  padding: 100px 5vw;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  align-items: center;
  gap: 50px;
}
.eyebrow { color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .2em; margin: 0 0 18px; }
h1 { font-size: clamp(55px, 8vw, 105px); line-height: .95; letter-spacing: -.055em; margin: 0 0 30px; }
h2 { font-size: clamp(40px, 5vw, 68px); line-height: 1.02; letter-spacing: -.045em; margin: 0 0 25px; }
h3 { margin: 10px 0 8px; font-size: 20px; }
.hero-text, .intro > p, .feature-copy > p, .about-copy p, .contact-box > p {
  color: var(--muted);
  max-width: 620px;
  font-size: 17px;
}
.hero-actions { display: flex; gap: 12px; margin-top: 32px; }
.button.secondary { border-color: var(--line); }
.hero-orb {
  width: min(420px, 80vw);
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  margin: auto;
  background: radial-gradient(circle, #24242a 0 18%, #15151a 19% 45%, transparent 46%);
  box-shadow: 0 0 120px rgba(216,255,56,.08);
}
.orb-ring { position: absolute; inset: 10%; border: 1px solid #37373e; border-radius: 50%; }
.ring2 { inset: 25%; border-style: dashed; }
.orb-core { position: absolute; inset: 43%; border-radius: 50%; background: var(--accent); box-shadow: 0 0 50px rgba(216,255,56,.35); }

.intro, .services, .about, .contact { padding: 120px 5vw; max-width: var(--max); margin: auto; }
.intro { border-top: 1px solid var(--line); }
.intro > p:last-child { max-width: 750px; }

.feature-section {
  max-width: 1300px;
  margin: auto;
  padding: 100px 5vw;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 70px;
  background: var(--panel);
}
.course-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--line); }
.course-grid article { background: var(--panel); padding: 28px; min-height: 170px; }
.course-grid b, .service-number { color: var(--accent); font-size: 12px; letter-spacing: .15em; }
.course-grid p, .service-card p { color: var(--muted); font-size: 14px; margin: 0; }

.section-heading { margin-bottom: 45px; }
.service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.service-card { border: 1px solid var(--line); padding: 32px; min-height: 230px; }
.service-card:hover { border-color: #55555d; }

.about { border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.about-copy { padding-top: 12px; }

.contact { padding-bottom: 150px; }
.contact-box {
  border: 1px solid var(--line);
  padding: 70px;
  background: var(--panel);
}
.small-note { font-size: 11px !important; margin-top: 18px; }

footer {
  border-top: 1px solid var(--line);
  padding: 35px 5vw;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 800px) {
  nav { display: none; position: absolute; top: 78px; left: 0; right: 0; background: var(--bg); padding: 25px 5vw; flex-direction: column; align-items: flex-start; }
  nav.open { display: flex; }
  .menu-toggle { display: block; }
  .hero, .feature-section, .about { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 80px; padding-bottom: 100px; }
  .hero-orb { width: 280px; order: -1; }
  .course-grid, .service-grid { grid-template-columns: 1fr; }
  .intro, .services, .about, .contact { padding-top: 80px; padding-bottom: 80px; }
  .contact-box { padding: 35px; }
  footer { flex-direction: column; gap: 12px; }
}