:root {
  color-scheme: dark;
  --bg: #050a16;
  --bg-alt: #0b152a;
  --bg-card: #101f3d;
  --bg-card-soft: rgba(16, 31, 61, 0.7);
  --border: rgba(122, 168, 255, 0.2);
  --accent: #7aa8ff;
  --accent-strong: #b3cbff;
  --text: #f2f5ff;
  --text-muted: rgba(242, 245, 255, 0.75);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top right, rgba(122, 168, 255, 0.08), transparent 35%), var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: var(--accent-strong);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #041022;
  box-shadow: 0 12px 24px rgba(122, 168, 255, 0.25);
}

.btn.primary:hover,
.btn.primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(122, 168, 255, 0.35);
}

.btn.ghost {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--accent-strong);
}

.btn.ghost:hover,
.btn.ghost:focus-visible {
  border-color: var(--accent);
  color: #fff;
}

.btn.outline {
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--accent-strong);
  background: rgba(4, 10, 22, 0.45);
}

.btn.outline:hover,
.btn.outline:focus-visible {
  border-color: var(--accent);
  color: #fff;
}

.ai-hero {
  position: relative;
  min-height: 90vh;
  padding: 2.5rem clamp(1.5rem, 5vw, 4rem) 4rem;
  overflow: hidden;
}

.ai-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto 4rem;
}

.ai-logo {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--text);
}

.ai-hero-content {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  display: grid;
  gap: 1.5rem;
}

.ai-hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 3.8rem);
  letter-spacing: -0.02em;
  margin: 0;
}

.ai-hero-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin: 0;
}

.ai-hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.ai-hero-visual {
  position: absolute;
  inset: 0;
  background: linear-gradient(130deg, rgba(122, 168, 255, 0.08), transparent 55%),
    radial-gradient(circle at 20% 20%, rgba(81, 118, 199, 0.22), transparent 45%);
  mix-blend-mode: screen;
  pointer-events: none;
}

main {
  padding: 4rem clamp(1.5rem, 5vw, 4rem) 6rem;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
  display: grid;
  gap: 1rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0;
}

.section-header p {
  margin: 0;
  color: var(--text-muted);
}

.overview-grid,
.card-grid,
.benefit-grid,
.program-grid,
.testimonial-grid {
  display: grid;
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.overview-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.overview-grid article {
  background: var(--bg-card-soft);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 2.25rem 2rem;
  backdrop-filter: blur(12px);
}

.overview-grid h2,
.overview-grid h3 {
  font-family: var(--font-display);
  margin-top: 0;
}

.overview-grid ul {
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.card-grid,
.benefit-grid,
.program-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card,
.program,
.benefit-grid article,
.testimonial-grid article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card::before,
.program::before,
.benefit-grid article::before,
.testimonial-grid article::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(122, 168, 255, 0.08), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover::before,
.program:hover::before,
.benefit-grid article:hover::before,
.testimonial-grid article:hover::before {
  opacity: 1;
}

.card:hover,
.program:hover,
.benefit-grid article:hover,
.testimonial-grid article:hover {
  transform: translateY(-6px);
  border-color: rgba(122, 168, 255, 0.45);
  box-shadow: 0 18px 36px rgba(5, 10, 22, 0.45);
}

.card h3,
.program h3,
.benefit-grid h3 {
  font-family: var(--font-display);
  margin-top: 0;
}

.card p,
.program p,
.benefit-grid p,
.testimonial-grid p {
  color: var(--text-muted);
}

.program ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.program ul li {
  padding-left: 1.4rem;
  position: relative;
  color: var(--text-muted);
}

.program ul li::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  left: 0;
  top: 0.55rem;
}

.testimonial-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.testimonial-grid span {
  color: var(--accent-strong);
  font-weight: 500;
}

.ai-cta {
  padding: 4rem 0;
}

.ai-cta-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem;
  background: linear-gradient(135deg, rgba(16, 31, 61, 0.85), rgba(8, 18, 36, 0.85));
  border: 1px solid rgba(122, 168, 255, 0.35);
  border-radius: 1.5rem;
  text-align: center;
  display: grid;
  gap: 1.5rem;
  box-shadow: 0 20px 50px rgba(2, 8, 20, 0.55);
}

.ai-cta-card h2 {
  font-family: var(--font-display);
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.ai-cta-card p {
  margin: 0;
  color: var(--text-muted);
}

.ai-cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.ai-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem clamp(1.5rem, 5vw, 4rem) 4rem;
  text-align: center;
  background: rgba(5, 10, 22, 0.85);
}

.ai-footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.ai-footer a {
  color: var(--accent-strong);
  text-decoration: none;
  font-weight: 500;
}

.ai-footer p {
  margin: 0;
  color: var(--text-muted);
}

@media (max-width: 720px) {
  .ai-hero {
    min-height: auto;
    padding-top: 2rem;
  }

  .ai-nav {
    margin-bottom: 2.5rem;
  }

  .ai-hero-content {
    text-align: left;
    align-items: flex-start;
  }

  .ai-hero-cta {
    justify-content: flex-start;
  }

  .ai-hero-content {
    gap: 1.25rem;
  }
}

@media (max-width: 560px) {
  .ai-hero {
    padding: 1.75rem 1.25rem 3rem;
  }

  main {
    padding: 3rem 1.25rem 4rem;
  }

  .ai-cta-card {
    padding: 2.5rem 1.75rem;
  }
}