:root {
  --bg: #ffffff;
  --bg-soft: #f1f4f7;
  --bg-dark: #08111f;
  --bg-dark-2: #0d1b30;
  --ink: #152236;
  --muted: #58687a;
  --line: rgba(21, 34, 54, 0.13);
  --line-dark: rgba(255, 255, 255, 0.12);
  --accent: #50dbc5;
  --accent-dark: #087d70;
  --max-width: 1160px;
  --radius: 20px;
  --shadow: 0 28px 80px rgba(4, 13, 28, 0.2);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, svg { max-width: 100%; }
button, input, textarea { font: inherit; }

.skip-link {
  position: fixed;
  left: -9999px;
  top: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--ink);
  background: #fff;
  border-radius: 8px;
}
.skip-link:focus { left: 1rem; }

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 17, 31, 0.94);
  border-bottom: 1px solid var(--line-dark);
  backdrop-filter: blur(16px);
}

.nav-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: #fff;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--bg-dark);
  background: var(--accent);
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.brand-text { display: grid; line-height: 1.15; }
.brand-text strong { font-size: 0.96rem; }
.brand-text small { margin-top: 0.2rem; color: #91a3b8; font-size: 0.72rem; }

.site-navigation {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.site-navigation a {
  color: #adbbcb;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 160ms ease;
}
.site-navigation a:hover,
.site-navigation a:focus-visible { color: #fff; }

.menu-button {
  display: none;
  padding: 0.55rem 0.8rem;
  color: #fff;
  background: transparent;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  cursor: pointer;
}

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  padding: 7rem 0;
  color: #fff;
  background:
    radial-gradient(circle at 82% 18%, rgba(80, 219, 197, 0.18), transparent 28%),
    radial-gradient(circle at 10% 90%, rgba(43, 92, 145, 0.16), transparent 32%),
    linear-gradient(145deg, var(--bg-dark), #10213a);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(310px, 0.65fr);
  gap: 5rem;
  align-items: center;
}

.eyebrow,
.section-label,
.card-kicker {
  margin: 0 0 1rem;
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero .eyebrow,
.hero .card-kicker,
.section-label.light { color: var(--accent); }

h1, h2, h3 {
  margin-top: 0;
  line-height: 1.12;
}

h1 {
  max-width: 900px;
  margin-bottom: 1.6rem;
  font-size: clamp(3.3rem, 7.2vw, 6.3rem);
  letter-spacing: -0.06em;
}

h2 {
  margin-bottom: 1.4rem;
  font-size: clamp(2.2rem, 4.4vw, 3.7rem);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.17rem;
  letter-spacing: -0.01em;
}

p { color: var(--muted); }

.hero-intro {
  max-width: 780px;
  color: #b9c5d3;
  font-size: clamp(1.05rem, 1.8vw, 1.22rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin: 2.2rem 0 1.5rem;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
}

.button-primary {
  color: var(--bg-dark);
  background: var(--accent);
}
.button-primary:hover { background: #7be6d5; }

.button-ghost {
  color: #fff;
  border: 1px solid var(--line-dark);
}
.button-ghost:hover { border-color: var(--accent); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  color: #8fa1b6;
  font-size: 0.86rem;
}

.hero-meta span { position: relative; }
.hero-meta span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -0.8rem;
  top: 50%;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
}

.system-card {
  padding: 2rem;
  background: rgba(13, 27, 48, 0.82);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.system-layer {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-top: 1px solid var(--line-dark);
}

.system-layer > span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 900;
}

.system-layer div { display: grid; }
.system-layer strong { font-size: 0.96rem; }
.system-layer small { margin-top: 0.25rem; color: #91a3b8; line-height: 1.45; }

.section { padding: 7rem 0; }
.section-muted { background: var(--bg-soft); }

.intro-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
  align-items: start;
}

.prose p { margin-top: 0; font-size: 1.06rem; }

.section-heading {
  max-width: 800px;
  margin-bottom: 3rem;
}
.section-heading > p:last-child { max-width: 680px; font-size: 1.04rem; }

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.expertise-card {
  min-height: 360px;
  padding: 1.65rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.expertise-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 42px rgba(21, 34, 54, 0.09);
}

.card-index {
  display: block;
  margin-bottom: 2.1rem;
  color: var(--accent-dark);
  font-size: 0.74rem;
  font-weight: 900;
}

.expertise-card ul {
  margin: 1.4rem 0 0;
  padding: 1.2rem 0 0 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.expertise-card li + li { margin-top: 0.4rem; }

.approach-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 5rem;
  align-items: center;
}

.approach-copy p { font-size: 1.04rem; }

.lifecycle { display: grid; }
.lifecycle-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}
.lifecycle-item > span {
  grid-row: 1 / span 2;
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 900;
}
.lifecycle-item strong { font-size: 0.98rem; }
.lifecycle-item small { margin-top: 0.18rem; color: var(--muted); }

.learning-section {
  color: #fff;
  background:
    radial-gradient(circle at 88% 20%, rgba(80, 219, 197, 0.13), transparent 28%),
    var(--bg-dark);
}

.learning-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 5rem;
  align-items: start;
}

.learning-section p { color: #afbdcd; }

.learning-map {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.learning-map article {
  padding: 1.5rem;
  background: var(--bg-dark-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}

.learning-map article > span {
  display: block;
  margin-bottom: 1.4rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.learning-map h3 { color: #fff; }
.learning-map p { margin-bottom: 0; font-size: 0.92rem; }

.interest-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem 2.5rem;
}

.interest-grid article {
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.interest-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 1.3rem;
  color: var(--accent-dark);
  background: #e5f8f4;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 900;
}

.contact-section { background: var(--bg-soft); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 5rem;
  align-items: start;
}

.contact-panel {
  display: grid;
  gap: 0.75rem;
  padding: 1.7rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.contact-note {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
}

.contact-link {
  display: grid;
  gap: 0.1rem;
  padding: 0.9rem 0;
  text-decoration: none;
  border-top: 1px solid var(--line);
}
.contact-link span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.contact-link strong {
  color: var(--accent-dark);
  overflow-wrap: anywhere;
}

.site-footer {
  padding: 1.6rem 0;
  background: var(--bg-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
}
.footer-grid p {
  margin: 0;
  color: #8ea0b4;
  font-size: 0.82rem;
}
.footer-grid p:nth-child(2) { text-align: center; }
.footer-grid a {
  color: #b7c5d4;
  text-decoration: none;
  font-size: 0.82rem;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: reveal 600ms ease forwards;
}
.delay-one { animation-delay: 120ms; }
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 920px) {
  .menu-button { display: inline-flex; }

  .site-navigation {
    display: none;
    position: absolute;
    inset: 76px 0 auto;
    padding: 1.25rem max(1rem, calc((100% - var(--max-width)) / 2));
    flex-direction: column;
    align-items: flex-start;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--line-dark);
  }
  .site-navigation.is-open { display: flex; }

  .hero-grid,
  .intro-grid,
  .approach-grid,
  .learning-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero { min-height: auto; }

  .expertise-grid,
  .interest-grid { grid-template-columns: repeat(2, 1fr); }

  .system-card { max-width: 620px; }
}

@media (max-width: 620px) {
  .brand-text small { display: none; }
  .hero { padding: 5rem 0; }
  h1 { font-size: clamp(3rem, 16vw, 4.6rem); }
  .section { padding: 5rem 0; }

  .expertise-grid,
  .interest-grid,
  .learning-map { grid-template-columns: 1fr; }

  .expertise-card { min-height: auto; }

  .hero-meta { display: grid; gap: 0.4rem; }
  .hero-meta span::after { display: none; }

  .footer-grid { grid-template-columns: 1fr; gap: 0.5rem; }
  .footer-grid p:nth-child(2) { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; animation: none; }
}