:root {
  color-scheme: dark;
  --ink: #f4f8fb;
  --muted: #a7b8c5;
  --navy: #07111d;
  --teal: #35c8c9;
  --paper: #f4f5f3;
  --paper-ink: #102233;
  --line: rgba(150, 185, 204, 0.22);
  font-family: "Segoe UI", Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--navy);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
}
a { color: inherit; }
h1, h2, p { margin-top: 0; }

.presentation-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 14px clamp(22px, 5vw, 84px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: #06101b;
}

.presentation-brand {
  display: grid;
  text-decoration: none;
  line-height: 1.15;
}

.presentation-brand strong {
  font-size: clamp(18px, 2vw, 24px);
  letter-spacing: 0.05em;
}

.presentation-brand span {
  margin-top: 5px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.presentation-nav-actions,
.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.text-link {
  color: #c5d4df;
  font-weight: 650;
  text-decoration: none;
}
.text-link:hover { color: #fff; }

.download-button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid #46dfe0;
  border-radius: 7px;
  background: #27b8bd;
  box-shadow: 0 12px 34px rgba(0, 188, 194, 0.24);
  color: #031216;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.download-button:hover {
  transform: translateY(-2px);
  background: #48d3d3;
  box-shadow: 0 16px 40px rgba(0, 188, 194, 0.32);
}

.download-button:focus-visible,
.text-link:focus-visible,
.presentation-brand:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 4px;
}

.download-button.compact {
  min-height: 42px;
  padding-inline: 18px;
}

.download-button.secondary {
  border-color: rgba(167, 184, 197, 0.7);
  background: transparent;
  box-shadow: none;
  color: #f4f8fb;
}

.download-button.secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.presentation-hero {
  min-height: min(790px, calc(100vh - 76px));
  display: grid;
  align-items: center;
  padding: clamp(56px, 8vw, 112px) clamp(22px, 5vw, 84px);
  background-image:
    linear-gradient(90deg, rgba(3, 10, 18, 0.98) 0%, rgba(3, 10, 18, 0.88) 36%, rgba(3, 10, 18, 0.15) 70%, rgba(3, 10, 18, 0.05) 100%),
    url("/assets/presentation-hero.png");
  background-position: center;
  background-size: cover;
}

.presentation-hero-copy { width: min(650px, 52vw); }

.hero-signature,
.section-heading > p,
.presentation-cta > div > p {
  margin: 0 0 16px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(46px, 6vw, 84px);
  font-weight: 820;
  letter-spacing: -0.045em;
  line-height: 0.98;
  text-wrap: balance;
}

.hero-intro {
  max-width: 610px;
  margin-bottom: 32px;
  color: #d6e0e7;
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.55;
}

.hero-actions {
  align-items: flex-start;
  flex-direction: column;
}

.hero-actions > span {
  color: #93a7b6;
  font-size: 13px;
}

.hero-benefits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: clamp(44px, 7vh, 76px) 0 0;
  border-top: 1px solid var(--line);
}

.hero-benefits > div { padding: 20px 22px 0 0; }
.hero-benefits > div + div {
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.hero-benefits dt {
  margin-bottom: 8px;
  color: #f7fbfd;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-benefits dd {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.journey-section,
.use-section,
.presentation-cta {
  padding: clamp(68px, 8vw, 112px) clamp(22px, 5vw, 84px);
}

.journey-section {
  background: var(--paper);
  color: var(--paper-ink);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 48px;
}

.section-heading h2,
.presentation-cta h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 52px);
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-wrap: balance;
}

.journey-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(16, 34, 51, 0.17);
  border-bottom: 1px solid rgba(16, 34, 51, 0.17);
  list-style: none;
}

.journey-steps li {
  min-height: 250px;
  padding: 30px 30px 30px 0;
}

.journey-steps li + li {
  padding-left: 30px;
  border-left: 1px solid rgba(16, 34, 51, 0.17);
}

.journey-steps span {
  display: block;
  margin-bottom: 38px;
  color: #1aa7b1;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.journey-steps strong,
.use-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.journey-steps p {
  margin: 0;
  color: #526271;
}

.use-section { background: #0b1d2b; }
.section-heading.light h2 { color: #f3f8fb; }

.use-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.use-grid article {
  min-height: 190px;
  padding: 28px 26px 20px 0;
}

.use-grid article + article {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.use-grid p {
  margin: 0;
  color: var(--muted);
}

.presentation-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #07121d;
}

.presentation-cta > div { max-width: 760px; }

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

footer {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px clamp(22px, 5vw, 84px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #040b12;
  color: #8194a3;
  font-size: 13px;
}

@media (max-width: 900px) {
  .presentation-nav { align-items: flex-start; }
  .presentation-nav-actions .text-link { display: none; }
  .presentation-hero {
    min-height: auto;
    padding-top: 86px;
    background-image:
      linear-gradient(180deg, rgba(3, 10, 18, 0.28) 0%, rgba(3, 10, 18, 0.78) 38%, rgba(3, 10, 18, 1) 72%),
      url("/assets/presentation-hero.png");
    background-position: 68% center;
  }
  .presentation-hero-copy {
    width: 100%;
    padding-top: min(48vw, 380px);
  }
  .hero-benefits,
  .journey-steps,
  .use-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-benefits > div:nth-child(3),
  .journey-steps li:nth-child(3),
  .use-grid article:nth-child(3) { border-left: 0; }
  .presentation-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .presentation-nav { min-height: 68px; }
  .presentation-nav-actions .download-button {
    min-height: 40px;
    padding-inline: 13px;
    font-size: 13px;
  }
  .presentation-brand span { display: none; }
  h1 { font-size: clamp(42px, 14vw, 62px); }
  .hero-benefits,
  .journey-steps,
  .use-grid { grid-template-columns: 1fr; }
  .hero-benefits > div,
  .hero-benefits > div + div,
  .journey-steps li,
  .journey-steps li + li,
  .use-grid article,
  .use-grid article + article {
    padding: 20px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
  .hero-benefits > div:first-child,
  .journey-steps li:first-child,
  .use-grid article:first-child { border-top: 0; }
  .journey-steps li { min-height: auto; }
  .journey-steps span { margin-bottom: 18px; }
  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .download-button { transition: none; }
}