:root {
  --bg: #e8ecf0;
  --surface: #f4f6f8;
  --elevated: #ffffff;
  --ink: #1a2330;
  --muted: #5a6675;
  --accent: #3a5f7a;
  --accent-hover: #2e4d64;
  --on-accent: #ffffff;
  --border: #c5ced8;
  --bubble-out: #d5e3ee;
  --night: #0b1016;
  --night-elev: #1a2330;
  --night-text: #e8eef4;
  --night-muted: #9aa8b8;
  --night-accent: #8fb4c9;
  --radius: 22px;
  --shadow: 0 18px 40px rgba(26, 35, 48, 0.1);
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.55;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, .brand, .nav a, .btn {
  font-family: Outfit, "Source Sans 3", sans-serif;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.wrap {
  width: min(var(--max), calc(100% - 2.4rem));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  padding: 0.5rem 0.8rem;
  z-index: 20;
}

header.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-weight: 650;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand svg { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-links a {
  color: var(--muted);
  font-weight: 560;
  font-size: 0.94rem;
}
.nav-links a:hover { color: var(--ink); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 0;
  border-radius: 999px;
  padding: 0.78rem 1.25rem;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost {
  background: transparent;
  color: var(--night-text);
  border: 1px solid color-mix(in srgb, #fff 22%, transparent);
}
.btn-ghost:hover { background: color-mix(in srgb, #fff 8%, transparent); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }

.hero {
  background:
    radial-gradient(900px 420px at 82% -8%, rgba(143, 180, 201, 0.16), transparent 52%),
    var(--night);
  color: var(--night-text);
  padding: 3.4rem 0 3rem;
}
.hero-grid {
  display: block;
  max-width: 40rem;
}
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--night-accent);
  margin: 0 0 0.8rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  font-weight: 650;
  margin: 0 0 0.9rem;
}
.lede {
  font-size: 1.18rem;
  color: var(--night-muted);
  max-width: 34rem;
  margin: 0 0 1.5rem;
}
.note {
  margin: 1rem 0 0;
  color: var(--night-muted);
  font-size: 0.92rem;
}

.band { padding: 3.6rem 0; }
.band-alt { background: var(--elevated); }
.band h2 {
  font-size: clamp(1.65rem, 2.8vw, 2.3rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.6rem;
}
.sub {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 38rem;
  margin: 0 0 1.7rem;
}

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.4rem;
  align-items: center;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.card {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.2rem 1.35rem;
}
.band-alt .card { background: var(--surface); }
.card h3 { margin: 0 0 0.4rem; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); }
.icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--bubble-out);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 0.75rem;
}
.icon svg { width: 18px; height: 18px; }

.plat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}
.plat-tile {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.25rem 1rem 1.3rem;
  text-align: center;
}
.plat-tile h3 { margin: 0 0 0.25rem; font-size: 1.02rem; }
.plat-tile p { margin: 0; color: var(--muted); font-size: 0.88rem; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  counter-reset: step;
}
.step {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-family: Outfit, sans-serif;
  font-weight: 650;
  margin-bottom: 0.7rem;
  font-size: 0.9rem;
}
.step h3 { margin: 0 0 0.35rem; }
.step p { margin: 0; color: var(--muted); }

.faq details {
  border-top: 1px solid var(--border);
  padding: 0.95rem 0;
}
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer;
  font-weight: 650;
  font-family: Outfit, sans-serif;
  font-size: 1.02rem;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--muted); margin: 0.55rem 0 0; }

.download-panel {
  background: var(--night);
  color: var(--night-text);
  border-radius: 24px;
  padding: 2.1rem;
}
.download-panel h2 { color: #fff; }
.download-panel .sub { color: var(--night-muted); }
.platforms {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 0.9rem;
}
.plat {
  background: var(--night-elev);
  border-radius: 16px;
  padding: 1.1rem;
}
.plat h3 { margin: 0 0 0.3rem; }
.plat p { margin: 0 0 0.9rem; color: var(--night-muted); font-size: 0.92rem; }
.soon {
  display: inline-block;
  color: var(--night-accent);
  font-weight: 650;
  font-size: 0.88rem;
}

.legal, .tech {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.6rem 0 5rem;
}
.legal h1, .tech h1 {
  letter-spacing: -0.03em;
  font-size: clamp(1.9rem, 3.5vw, 2.6rem);
  margin: 0 0 0.5rem;
}
.legal h2, .tech h2 { margin-top: 2rem; font-size: 1.22rem; letter-spacing: -0.02em; }
.legal h3, .tech h3 { margin-top: 1.3rem; font-size: 1.05rem; }
.legal .meta, .tech .muted { color: var(--muted); }
.legal ul, .tech ul { color: var(--ink); }
.legal li + li, .tech li + li { margin-top: 0.3rem; }
.legal .lede, .tech .lede { color: var(--muted); max-width: none; font-size: 1.12rem; }
.toc {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem 1.2rem;
  margin: 1.4rem 0 1.8rem;
}
.toc h2 { margin: 0 0 0.45rem; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc a { color: var(--ink); }
.callout {
  background: var(--bubble-out);
  border-radius: 14px;
  padding: 0.95rem 1.1rem;
  margin: 1.1rem 0;
}
.callout p { margin: 0; }
.table-wrap { overflow-x: auto; margin: 1rem 0 1.3rem; }
table.tech-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
.tech-table th, .tech-table td {
  text-align: left;
  padding: 0.6rem 0.65rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.tech-table th { color: var(--muted); font-weight: 650; font-family: Outfit, sans-serif; }
.flow { display: grid; gap: 0.6rem; margin: 1.1rem 0 1.4rem; }
.flow-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.45rem;
  align-items: center;
}
.flow-box {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem 0.8rem;
  text-align: center;
  font-family: Outfit, sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
}
.flow-box small {
  display: block;
  font-weight: 500;
  color: var(--muted);
  font-family: "Source Sans 3", sans-serif;
  margin-top: 0.15rem;
}
.flow-arrow { color: var(--muted); }

footer {
  background: var(--night);
  color: var(--night-muted);
  padding: 1.7rem 0;
  font-size: 0.92rem;
}
.foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}
.foot a { color: var(--night-accent); }
.foot nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }

@media (max-width: 860px) {
  .hero-grid, .split, .card-grid, .steps, .platforms, .plat-row {
    grid-template-columns: 1fr 1fr;
  }
  .hero-grid, .split, .steps, .platforms { grid-template-columns: 1fr; }
  .nav-links .hide-sm { display: none; }
  .hero { padding-top: 2.1rem; }
  .flow-row { grid-template-columns: 1fr; text-align: center; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; }
}
@media (max-width: 520px) {
  .plat-row { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}