:root {
  color-scheme: dark;
  --bg: #07100d;
  --surface: #0d1a16;
  --surface-strong: #132720;
  --text: #eef7f1;
  --muted: #a8bdb2;
  --line: rgba(238, 247, 241, 0.14);
  --accent: #73f2a7;
  --accent-strong: #37cf7d;
  --accent-soft: rgba(115, 242, 167, 0.12);
  --shadow: rgba(0, 0, 0, 0.36);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(55, 207, 125, 0.18), transparent 28rem),
    radial-gradient(circle at 80% 10%, rgba(115, 242, 167, 0.1), transparent 22rem),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
}

.brand,
.nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: inline-grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--accent-soft);
  color: var(--accent);
}

.nav {
  gap: 0.4rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 16, 13, 0.72);
}

.nav a {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.section-shell {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 5rem 0;
}

.hero {
  display: grid;
  min-height: calc(100vh - 5rem);
  align-content: center;
  padding-top: 7rem;
}

.eyebrow,
.section-kicker {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 960px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.2rem, 10vw, 7.6rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}

h2 {
  max-width: 820px;
  margin-bottom: 1.25rem;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

h3 {
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
  line-height: 1.25;
}

.hero-copy {
  max-width: 780px;
  color: var(--muted);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin: 2rem 0 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent);
  color: #06100c;
  box-shadow: 0 1rem 2rem var(--shadow);
}

.button.secondary {
  border-color: var(--line);
  background: rgba(13, 26, 22, 0.74);
  color: var(--text);
}

.microcopy {
  max-width: 620px;
  color: var(--muted);
  font-size: 0.95rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
}

.prose {
  color: var(--muted);
  font-size: 1.08rem;
}

.callout {
  margin-top: 1.5rem;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--accent-soft);
  color: var(--text);
  font-weight: 800;
}

.steps,
.cards {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.steps article,
.cards article,
.principles li {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: linear-gradient(180deg, rgba(19, 39, 32, 0.92), rgba(13, 26, 22, 0.82));
  box-shadow: 0 1rem 2rem var(--shadow);
}

.steps article,
.cards article {
  padding: 1.2rem;
}

.steps span {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 900;
}

.steps p,
.cards p,
.principles li {
  color: var(--muted);
}

.cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principles {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.principles li {
  padding: 1.2rem;
}

.principles strong {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.closing {
  max-width: 900px;
  text-align: center;
}

.closing p {
  color: var(--muted);
  font-size: 1.12rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    max-width: 70vw;
    flex-wrap: wrap;
    justify-content: flex-end;
    border-radius: 1.2rem;
  }

  .split,
  .steps,
  .cards,
  .principles {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 5rem;
  }
}

@media (max-width: 620px) {
  .site-header {
    position: static;
    flex-direction: column;
  }

  .nav {
    max-width: none;
    justify-content: flex-start;
  }

  .section-shell {
    padding: 3.5rem 0;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 4.8rem);
  }
}