:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --ink: #1d1d1f;
  --muted: rgba(29, 29, 31, .68);
  --dark: #000000;
  --dark-soft: #1d1d1f;
  --dark-card: #242426;
  --white: #ffffff;
  --blue: #0071e3;
  --blue-hover: #0066cc;
  --blue-light: #2997ff;
  --max: 1100px;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(0, 0, 0, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
a:hover { text-decoration-thickness: 2px; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: .75rem;
  z-index: 100;
  transform: translateY(-160%);
  padding: .7rem 1rem;
  border-radius: 999px;
  color: var(--white);
  background: var(--blue);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(0, 0, 0, .78);
  backdrop-filter: saturate(180%) blur(20px);
}
.nav {
  width: min(var(--max), calc(100% - 2rem));
  min-height: 48px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(255, 255, 255, .92);
}
.brand {
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: -.02em;
  text-decoration: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.5rem);
}
.nav-links a {
  color: rgba(255, 255, 255, .82);
  font-size: .76rem;
  text-decoration: none;
  transition: color .2s ease;
}
.nav-links a:hover,
.nav-links a.is-active { color: var(--white); }
.nav-toggle { display: none; }

.dark-scene {
  color: var(--white);
  background: var(--dark);
}
.light-scene { background: var(--bg); }
.white-scene { background: var(--surface); }

.hero {
  min-height: calc(100svh - 48px);
  display: grid;
  place-items: center;
  text-align: center;
  padding: clamp(5rem, 10vw, 8rem) 0;
}
.hero-inner { max-width: 980px; }
.kicker {
  margin: 0 0 1rem;
  color: rgba(29, 29, 31, .58);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.dark-scene .kicker { color: rgba(255, 255, 255, .58); }

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 1.1rem;
  font-size: clamp(3.4rem, 10vw, 7rem);
  line-height: .92;
  letter-spacing: -.075em;
}
h2 {
  margin-bottom: 1.1rem;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1;
  letter-spacing: -.06em;
}
h3 {
  margin-bottom: .75rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}
.hero-lead {
  max-width: 760px;
  margin-inline: auto;
  color: rgba(255, 255, 255, .68);
  font-size: clamp(1.2rem, 2.5vw, 1.75rem);
  line-height: 1.22;
  letter-spacing: -.03em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .8rem;
  margin-top: 2rem;
}
.pill {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: .78rem 1.15rem;
  font-size: .98rem;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.pill:hover { transform: translateY(-1px); }
.blue { color: var(--white); background: var(--blue); }
.blue:hover { background: var(--blue-hover); }
.outline { color: var(--blue-hover); border: 1px solid currentColor; }
.outline.light { color: var(--blue-light); }

.section { padding: clamp(5rem, 10vw, 9rem) 0; }
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .9fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: center;
}
.reverse { grid-template-columns: minmax(280px, .9fr) minmax(0, 1fr); }
.copy-block {
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
}
.copy-block a { color: var(--blue-hover); }
.center-heading {
  max-width: 850px;
  margin: 0 auto clamp(2rem, 5vw, 4rem);
  text-align: center;
}
.dark-scene .center-heading p,
.dark-scene .card p { color: rgba(255, 255, 255, .68); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  padding: clamp(1.35rem, 3vw, 1.8rem);
  background: var(--dark-card);
}
.card-number {
  margin-bottom: auto;
  color: rgba(255, 255, 255, .45);
  font-size: .8rem;
}
.card a {
  margin-top: auto;
  color: var(--blue-light);
  text-decoration: none;
}
.card a:hover { text-decoration: underline; }

.statement-panel {
  min-height: 430px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  box-shadow: var(--shadow);
}
.dark-panel {
  color: var(--white);
  background: radial-gradient(circle at 30% 25%, rgba(255, 255, 255, .16), transparent 30%), linear-gradient(145deg, #1d1d1f, #000);
}
.statement-panel span {
  margin-bottom: auto;
  color: rgba(255, 255, 255, .58);
  font-size: .9rem;
}
.statement-panel strong {
  max-width: 520px;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: .98;
  letter-spacing: -.06em;
}

.stack-list { display: grid; gap: .75rem; }
.stack-list div,
.link-card {
  border-radius: 22px;
  padding: 1.15rem;
  background: var(--bg);
}
.stack-list strong,
.stack-list span,
.link-card span,
.link-card strong { display: block; }
.stack-list span,
.link-card span { color: var(--muted); }
.link-card {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--ink);
  text-decoration: none;
  transition: transform .2s ease, background .2s ease;
}
.link-card:hover { transform: translateY(-2px); background: #ececf0; }
.link-card strong {
  color: var(--blue-hover);
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  letter-spacing: -.03em;
}

.contact-inner {
  max-width: 900px;
  text-align: center;
}
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
  padding: 2rem 0;
  color: var(--muted);
  font-size: .9rem;
}
.footer p { margin: 0; }
.footer a { color: var(--blue-hover); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

@media (max-width: 860px) {
  .nav-toggle {
    width: 44px;
    height: 44px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    border: 0;
    background: transparent;
    color: var(--white);
  }
  .nav-toggle span:not(.sr-only) {
    width: 20px;
    height: 1px;
    background: currentColor;
  }
  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 48px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem calc((100% - min(var(--max), calc(100% - 2rem))) / 2) 1.35rem;
    background: rgba(0, 0, 0, .94);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    font-size: 1rem;
  }
  .hero { text-align: left; place-items: center start; }
  .hero-lead { margin-inline: 0; }
  .actions { justify-content: flex-start; }
  .split, .reverse, .grid { grid-template-columns: 1fr; }
  .center-heading { text-align: left; }
  .statement-panel { min-height: 320px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; scroll-behavior: auto !important; }
}