:root {
  --bg: #090B0D;
  --bg-2: #0D1114;
  --panel: #14181B;
  --panel-2: #1B2226;
  --panel-3: #101417;
  --text: #F4F0E7;
  --muted: #A7B6B8;
  --teal: #00C7CF;
  --teal-bright: #19F0F2;
  --teal-deep: #007C84;
  --cream-line: rgba(244, 240, 231, 0.16);
  --line: rgba(0, 199, 207, 0.35);
  --line-soft: rgba(0, 199, 207, 0.18);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.52);
  --glow: 0 0 34px rgba(0, 199, 207, 0.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 4%, rgba(25, 240, 242, 0.16), transparent 30rem),
    radial-gradient(circle at 82% 12%, rgba(0, 199, 207, 0.12), transparent 28rem),
    linear-gradient(135deg, rgba(255,255,255,.035) 0 1px, transparent 1px 34px),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: rgba(9, 11, 13, 0.88);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(18px);
}

.brand { display: flex; gap: .75rem; align-items: center; text-decoration: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: .95rem;
  background: linear-gradient(135deg, var(--teal-bright), var(--teal));
  color: #050708;
  font-weight: 950;
  letter-spacing: -0.08em;
  border: 2px solid rgba(244, 240, 231, .82);
  box-shadow: var(--glow);
  overflow: hidden;
}
.brand-mark-image { background: #050708; padding: .1rem; }
.brand-mark-image img { width: 100%; height: 100%; object-fit: cover; border-radius: .8rem; }
.brand-copy { display: grid; }
.brand-copy strong { color: var(--text); }
.brand-copy small { color: var(--muted); }

.nav { display: flex; gap: .35rem; flex-wrap: wrap; justify-content: flex-end; }
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 800;
  font-size: .9rem;
  padding: .55rem .75rem;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav a:hover {
  color: var(--text);
  background: rgba(0, 199, 207, .09);
  border-color: var(--line-soft);
}

.nav a.active {
  color: var(--text);
  background: rgba(0, 199, 207, .13);
  border-color: var(--line-soft);
}
.page-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 10%, rgba(25,240,242,.16), transparent 26rem),
    linear-gradient(180deg, rgba(0,199,207,.045), rgba(244,240,231,.018));
  border-bottom: 1px solid var(--line-soft);
}
.compact-hero { min-height: 42vh; display: grid; align-content: center; }
.page-hero h1 { max-width: 12ch; }
.page-hero .lead { max-width: 48rem; }
.card-link { color: var(--teal-bright); font-weight: 950; }

.section-pad { padding: clamp(3.5rem, 8vw, 7rem) clamp(1rem, 4vw, 3rem); }
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, .75fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  min-height: 78vh;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 4vw 7vh auto;
  width: min(34rem, 72vw);
  height: min(34rem, 72vw);
  border: 1px solid rgba(25, 240, 242, .22);
  border-radius: 50%;
  box-shadow: inset 0 0 0 1rem rgba(0, 199, 207, .035), var(--glow);
  opacity: .75;
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 5rem 2rem auto auto;
  width: 28rem;
  height: 28rem;
  background: radial-gradient(circle, rgba(25,240,242,.24), transparent 70%);
  pointer-events: none;
}
.hero-content, .hero-card, .action-card, .info-card, .course-card, .checklist-card, .stats-card, .contact-card {
  position: relative;
}
.eyebrow {
  margin: 0 0 .75rem;
  color: var(--teal-bright);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .75rem;
  font-weight: 950;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 12ch;
  font-size: clamp(3.1rem, 12vw, 7.4rem);
  line-height: .88;
  letter-spacing: -.08em;
  margin-bottom: 1.25rem;
  text-shadow: 0 0 28px rgba(0,199,207,.16);
}
h2 { font-size: clamp(2rem, 5vw, 4rem); line-height: 1; letter-spacing: -.055em; margin-bottom: 1rem; }
h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.lead { max-width: 43rem; color: #E7F7F4; font-size: clamp(1.1rem, 2vw, 1.35rem); }
p { color: var(--muted); }
strong { color: var(--text); }

.hero-actions, .inline-actions, .chainledger-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: .8rem 1.05rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 950;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--teal-bright), var(--teal));
  color: #050708;
  box-shadow: 0 10px 32px rgba(0,199,207,.22);
}
.btn-secondary {
  background: rgba(244,240,231,.07);
  color: var(--text);
  border-color: var(--cream-line);
}
.btn-secondary:hover { border-color: rgba(244,240,231,.34); }
.btn-ghost {
  color: var(--teal-bright);
  border-color: var(--line);
  background: rgba(0,199,207,.045);
}

.hero-card, .action-card, .info-card, .course-card, .checklist-card, .stats-card, .contact-card {
  background: linear-gradient(180deg, rgba(27,34,38,.94), rgba(16,20,23,.94));
  border: 1px solid var(--line-soft);
  border-radius: 1.6rem;
  padding: 1.35rem;
  box-shadow: var(--shadow);
}
.hero-card {
  border-color: var(--line);
  box-shadow: var(--shadow), var(--glow);
}
.status-pill, .tag {
  display: inline-flex;
  width: fit-content;
  padding: .35rem .6rem;
  border-radius: 999px;
  background: rgba(0,199,207,.13);
  border: 1px solid rgba(25,240,242,.18);
  color: var(--teal-bright);
  font-size: .75rem;
  font-weight: 950;
  margin-bottom: 1rem;
}

.quick-actions, .grid { display: grid; gap: 1rem; }
.quick-actions { grid-template-columns: repeat(3, 1fr); padding-top: 0; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.action-card span { color: var(--teal); font-weight: 950; }
.action-card a, .info-card a { color: var(--teal-bright); font-weight: 950; }

.split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(18rem, .65fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: center; }
ul { padding-left: 1.1rem; color: var(--muted); }
li + li { margin-top: .45rem; }
li::marker { color: var(--teal); }
.section-heading { max-width: 48rem; margin-bottom: 1.4rem; }
.feature-section {
  background: linear-gradient(180deg, rgba(0,199,207,.035), rgba(244,240,231,.025));
  border-block: 1px solid var(--cream-line);
}
.course-card { min-height: 15rem; }
.muted-card { opacity: .78; }
.chainledger-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background:
    radial-gradient(circle at 12% 50%, rgba(25,240,242,.14), transparent 28rem),
    linear-gradient(135deg, rgba(0,199,207,.10), rgba(244,240,231,.035));
  border-block: 1px solid var(--line-soft);
}
.stats-card dl { margin: 0; display: grid; gap: .8rem; }
.stats-card div { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line-soft); padding-bottom: .75rem; }
dt { color: var(--muted); } dd { margin: 0; font-weight: 950; color: var(--text); }
.sponsor-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.sponsor-strip span, .sponsor-logo {
  min-height: 7rem;
  display: grid;
  place-items: center;
  border: 1px dashed var(--line);
  border-radius: 1.2rem;
  color: var(--muted);
  background: rgba(244,240,231,.035);
  text-decoration: none;
  text-align: center;
}
.chainledger-sponsor {
  place-items: center start;
  padding: 1.25rem;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(124,247,162,.34);
  background:
    linear-gradient(90deg, rgba(124,247,162,.95) 0%, rgba(50,213,131,.62) 42%, rgba(50,213,131,.18) 72%, rgba(20,24,27,.10) 100%);
  color: #041007;
  box-shadow: 0 18px 48px rgba(50,213,131,.16);
}
.chainledger-sponsor::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0 48%, rgba(9,11,13,.20) 72%, rgba(9,11,13,.44));
  pointer-events: none;
}
.chainledger-sponsor strong,
.chainledger-sponsor small { position: relative; z-index: 1; }
.chainledger-sponsor strong { display: block; font-size: clamp(1.35rem, 3vw, 2.1rem); line-height: 1; letter-spacing: -.055em; font-weight: 950; }
.chainledger-sponsor small { display: block; margin-top: .45rem; color: rgba(4,16,7,.78); font-weight: 850; }
.contact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, .55fr); gap: 2rem; align-items: center; }
.contact-card { display: grid; gap: .85rem; }
.contact-card a { color: var(--teal-bright); font-weight: 850; }
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  background: rgba(5,7,8,.42);
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--teal-bright); }

@media (max-width: 880px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .nav { justify-content: flex-start; }
  .hero, .split, .contact { grid-template-columns: 1fr; }
  .quick-actions, .grid.three, .sponsor-strip { grid-template-columns: 1fr; }
  .chainledger-band { display: block; }
  h1 { max-width: 9ch; }
}

@media (max-width: 520px) {
  .brand-copy small { display: none; }
  .nav a { padding: .45rem .55rem; font-size: .82rem; }
  .section-pad { padding-inline: 1rem; }
  .hero-actions .btn, .inline-actions .btn, .chainledger-actions .btn { width: 100%; }
}

.hero-logo-card { display: grid; align-content: start; gap: .75rem; overflow: hidden; }
.hero-shark {
  width: min(100%, 20rem);
  margin: -1.2rem auto .4rem;
  display: block;
  filter: drop-shadow(0 18px 42px rgba(0,199,207,.18));
}
.course-card .tag { margin-bottom: .8rem; }