:root {
  --bg: #07111f;
  --surface: rgba(9, 23, 40, 0.72);
  --surface-strong: rgba(12, 29, 50, 0.92);
  --border: rgba(187, 211, 255, 0.12);
  --text: #ecf3ff;
  --muted: #a7b8d6;
  --accent: #78c8ff;
  --accent-strong: #e7b65e;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(78, 133, 255, 0.18), transparent 28rem),
    radial-gradient(circle at bottom right, rgba(231, 182, 94, 0.16), transparent 22rem),
    linear-gradient(180deg, #07111f 0%, #091826 100%);
  color: var(--text);
  min-height: 100vh;
}

.ambient {
  position: fixed;
  inset: auto;
  width: 28rem;
  height: 28rem;
  filter: blur(60px);
  opacity: 0.3;
  pointer-events: none;
}

.ambient-one {
  top: -10rem;
  right: -8rem;
  background: rgba(120, 200, 255, 0.2);
}

.ambient-two {
  bottom: -8rem;
  left: -10rem;
  background: rgba(231, 182, 94, 0.18);
}

.shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  padding: 5rem 0 2rem;
}

.hub-logo {
  display: inline-flex;
  width: min(100%, 28rem);
  margin-bottom: 1.5rem;
}

.hub-logo img {
  display: block;
  width: 100%;
  height: auto;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: "Fraunces", serif;
  line-height: 0.98;
  margin: 0;
}

h1 {
  max-width: 11ch;
  font-size: clamp(3rem, 8vw, 5.6rem);
}

h2 {
  max-width: 14ch;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.hero-copy,
.footer p {
  max-width: 52rem;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button,
.text-link {
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  background: linear-gradient(135deg, var(--accent) 0%, #9ae6ff 100%);
  color: #08121b;
}

.button.secondary {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.button:hover,
.text-link:hover {
  transform: translateY(-2px);
}

.section {
  padding: 3rem 0;
}

.section-head {
  margin-bottom: 1.8rem;
}

.card-grid,
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.concept-card,
.check-card {
  padding: 1.6rem;
  border-radius: 1.6rem;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.concept-label {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(120, 200, 255, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.concept-card p,
.check-card li {
  color: var(--muted);
  line-height: 1.7;
}

.concept-card ul,
.check-card ul {
  margin: 1rem 0 1.25rem;
  padding-left: 1rem;
}

.text-link {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 700;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
}

.footer {
  padding: 1rem 0 4rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms ease, transform 600ms ease;
}

@media (max-width: 860px) {
  .card-grid,
  .checklist-grid {
    grid-template-columns: 1fr;
  }
}