:root {
  --bg: #f6f7fb;
  --bg-2: #eceef6;
  --fg: #12141a;
  --muted: #4a5060;
  --line: #d9dcea;
  --card: #ffffff;
  --accent: #3448d1;
  --accent-2: #8a3fd1;
  --on-accent: #ffffff;
  --glow-a: rgba(80, 100, 255, 0.22);
  --glow-b: rgba(170, 70, 230, 0.16);
  --shadow: 0 1px 2px rgba(20, 24, 40, 0.06), 0 8px 24px rgba(20, 24, 40, 0.06);
  --radius: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0c11;
    --bg-2: #10131b;
    --fg: #eceef4;
    --muted: #a6acbd;
    --line: #232837;
    --card: #131722;
    --accent: #93b0ff;
    --accent-2: #c79bff;
    --on-accent: #0a0c11;
    --glow-a: rgba(90, 120, 255, 0.28);
    --glow-b: rgba(180, 90, 255, 0.20);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 1.0625rem/1.65 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, sans-serif; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 16px; top: -100px; z-index: 100; background: var(--card); color: var(--fg); padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); }
.skip:focus { top: 16px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 650; font-size: 1.05rem; }
.brand-soft { color: var(--muted); font-weight: 450; }
.logo { width: 32px; height: 32px; }
.logo-bg { fill: var(--accent); }
.logo-wave { stroke: var(--on-accent); stroke-width: 2.4; stroke-linecap: round; fill: none; }
nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; flex-wrap: wrap; }
nav a { display: block; padding: 8px 12px; border-radius: 10px; color: var(--fg); text-decoration: none; font-weight: 500; }
nav a:hover { background: var(--bg-2); }

/* Hero */
.hero { position: relative; padding: 96px 0 72px; overflow: hidden; isolation: isolate; }
.glow {
  position: absolute; inset: -20% -10% auto; height: 640px; z-index: -1;
  background:
    radial-gradient(40% 50% at 25% 35%, var(--glow-a), transparent 70%),
    radial-gradient(35% 45% at 75% 25%, var(--glow-b), transparent 70%);
  filter: blur(10px);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0.5;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(60% 60% at 50% 30%, #000 10%, transparent 75%);
  mask-image: radial-gradient(60% 60% at 50% 30%, #000 10%, transparent 75%);
}
.eyebrow { display: inline-block; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
h1 { font-size: clamp(2.3rem, 6vw, 4.2rem); font-weight: 700; max-width: 16ch; }
h1, .grad {
  background: linear-gradient(110deg, var(--fg) 30%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--muted); max-width: 60ch; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 56px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 12px; font-weight: 600; text-decoration: none;
  border: 1px solid transparent; transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent); box-shadow: 0 6px 20px var(--glow-a); }
.btn-ghost { background: var(--card); color: var(--fg); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); }

.pillars { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.pillars li { display: flex; gap: 14px; align-items: flex-start; background: color-mix(in srgb, var(--card) 75%, transparent); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; color: var(--muted); }
.pillars strong { color: var(--fg); }
.pillars svg, .icon { flex: none; width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Sections */
section { padding: 88px 0; }
.band { background: var(--bg-2); border-block: 1px solid var(--line); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; max-width: 22ch; }
.note { color: var(--muted); max-width: 70ch; }

/* Relay */
.relay { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.relay-copy p { color: var(--muted); }
.ticks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 32px; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 0.3em; width: 20px; height: 20px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M10 0a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm4.6 7.2-5.5 6a1 1 0 0 1-1.5 0l-2.3-2.5 1.4-1.4 1.6 1.7 4.8-5.2z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M10 0a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm4.6 7.2-5.5 6a1 1 0 0 1-1.5 0l-2.3-2.5 1.4-1.4 1.6 1.7 4.8-5.2z'/%3E%3C/svg%3E") center / contain no-repeat;
}
.plans { display: grid; gap: 16px; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.plan:first-of-type { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); }
.plan h4 { font-size: 1.3rem; margin-bottom: 4px; }
.price { font-size: 1.05rem; font-weight: 600; color: var(--accent); margin-bottom: 10px; }
.plan p:not(.price) { color: var(--muted); }
.plan .btn { width: 100%; }

/* Downloads */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin-top: 36px; }
.card {
  display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); transform: translateY(-2px); }
.card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.card-head h3 { flex: 1; min-width: 0; }
.card-head .icon { width: 40px; height: 40px; padding: 8px; border-radius: 12px; background: color-mix(in srgb, var(--accent) 12%, transparent); }
.card h3 { font-size: 1.3rem; margin: 0; }
.ver { flex: none; white-space: nowrap; font-size: 0.8rem; font-weight: 600; color: var(--muted); background: var(--bg-2); border: 1px solid var(--line); padding: 3px 10px; border-radius: 999px; }
.card > p { color: var(--muted); }
.dl { list-style: none; padding: 0; margin: auto 0 12px; display: grid; gap: 8px; }
.btn-dl { width: 100%; justify-content: space-between; background: var(--bg-2); color: var(--fg); border-color: var(--line); }
.btn-dl:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--bg-2)); }
.size { font-weight: 450; color: var(--muted); font-size: 0.9rem; }
.links { display: flex; gap: 16px; font-size: 0.95rem; }
details { border-top: 1px solid var(--line); padding-top: 10px; font-size: 0.9rem; color: var(--muted); }
summary { cursor: pointer; font-weight: 500; }
dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 10px 0 0; }
dt { font-weight: 600; color: var(--fg); }
dd { margin: 0; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.78rem; word-break: break-all; }

/* Contact and footer */
.contact p { color: var(--muted); font-size: 1.1rem; }
.foot { padding: 32px 0 48px; color: var(--muted); font-size: 0.9rem; }

/* 404 */
.lost { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 64px 0; }
.lost h1 { margin-inline: auto; }
.center { justify-content: center; }

@media (max-width: 860px) {
  .relay { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 64px 0 48px; }
  section { padding: 64px 0; }
}
@media (max-width: 420px) {
  .wrap { padding: 0 16px; }
  .grid { grid-template-columns: 1fr; }
  .brand-soft { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .btn:hover, .card:hover { transform: none; }
}
@media (forced-colors: active) {
  h1, .grad { background: none; color: CanvasText; }
  .btn, .card, .plan, .pillars li { border: 1px solid CanvasText; }
  .ticks li::before { background: CanvasText; }
  .logo-bg { fill: CanvasText; }
  .logo-wave { stroke: Canvas; }
}
@media print {
  .top, .glow, .hero::after, .cta { display: none; }
  body { background: #fff; color: #000; }
}