:root {
  --bg: #0b0d14;
  --bg-2: #10131c;
  --card: rgba(255, 255, 255, 0.04);
  --card-line: rgba(255, 255, 255, 0.09);
  --ink: #eef0f6;
  --muted: #a3a9ba;
  --accent: #7c9cff;
  --accent-2: #41e0c3;
  --ok: #6fe0a7;
  --bad: #ff8a80;
  --field: rgba(255, 255, 255, 0.05);
  --radius: 18px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* top bar */
.top { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(14px); background: rgba(11, 13, 20, 0.72); border-bottom: 1px solid var(--card-line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: -0.01em; font-size: 18px; }
.logo { width: 32px; height: 32px; border-radius: 10px; display: inline-grid; place-items: center; font-weight: 900; color: #0b0d14; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
nav { display: flex; align-items: center; gap: 22px; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 600; }
nav a:hover { color: var(--ink); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer; font: inherit; font-weight: 700; text-decoration: none; color: #0b0d14; background: linear-gradient(135deg, var(--accent), var(--accent-2)); padding: 13px 22px; border-radius: 14px; box-shadow: 0 10px 30px rgba(124, 156, 255, 0.25); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 36px rgba(124, 156, 255, 0.35); }
.btn.ghost { color: var(--ink); background: transparent; border: 1px solid var(--card-line); box-shadow: none; }
.btn.small { padding: 8px 14px; font-size: 14px; color: #0b0d14; }
.btn[disabled] { opacity: 0.6; cursor: default; transform: none; }

/* hero */
.hero { position: relative; overflow: hidden; padding: 96px 0 88px; }
.hero-in { position: relative; display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 12.5px; font-weight: 700; color: var(--accent-2); margin: 0 0 14px; }
h1 { font-size: clamp(36px, 5.6vw, 60px); line-height: 1.05; letter-spacing: -0.035em; margin: 0 0 18px; }
h2 { font-size: clamp(28px, 3.6vw, 40px); letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 28px; }
h3 { font-size: 18px; margin: 0 0 6px; letter-spacing: -0.01em; }
.grad { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); font-size: 18.5px; max-width: 560px; margin: 0 0 28px; }
.lead.small { font-size: 17px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }

.aurora span { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; animation: drift 18s ease-in-out infinite alternate; }
.aurora span:nth-child(1) { width: 520px; height: 520px; background: #3d55d6; top: -180px; left: -120px; }
.aurora span:nth-child(2) { width: 460px; height: 460px; background: #0fb39a; top: 40px; right: -160px; animation-duration: 22s; }
.aurora span:nth-child(3) { width: 380px; height: 380px; background: #7a3bd6; bottom: -220px; left: 35%; animation-duration: 26s; opacity: 0.35; }
@keyframes drift { from { transform: translate(0, 0) scale(1); } to { transform: translate(60px, 40px) scale(1.15); } }
.grid-bg { position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px); background-size: 44px 44px; mask-image: radial-gradient(ellipse at 60% 40%, black 30%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse at 60% 40%, black 30%, transparent 75%); }

.hero-art { margin: 0; }
.arch { width: 100%; height: auto; display: block; filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.45)); }
.arch .links path { stroke: url(#g1); stroke-width: 2; fill: none; opacity: 0.55; stroke-dasharray: 6 8; animation: dash 6s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -140; } }
.arch .pulses circle { fill: #ffffff; filter: drop-shadow(0 0 6px #7c9cff); }
.arch .nodes rect { fill: rgba(16, 19, 28, 0.92); stroke: rgba(124, 156, 255, 0.55); stroke-width: 1.5; }
.arch .nodes text { fill: var(--ink); font-size: 15px; font-weight: 700; text-anchor: middle; font-family: inherit; }
.arch .shield path { fill: rgba(65, 224, 195, 0.14); stroke: var(--accent-2); stroke-width: 1.8; }
.arch .shield .tick { fill: none; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

/* sections */
.section { padding: 88px 16px; }
.band { background: linear-gradient(180deg, var(--bg-2), var(--bg)); border-top: 1px solid var(--card-line); border-bottom: 1px solid var(--card-line); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius); padding: 26px; transition: border-color 0.2s ease, transform 0.2s ease; }
.cards .card:hover { border-color: rgba(124, 156, 255, 0.45); transform: translateY(-3px); }
.card p { color: var(--muted); margin: 0 0 14px; }
.card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: 14.5px; }
.card li::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); margin: 0 10px 2px 0; }
.icon { width: 40px; height: 40px; padding: 8px; border-radius: 12px; background: rgba(124, 156, 255, 0.12); fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 16px; }

.steps { list-style: none; padding: 0; margin: 0 0 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: s; }
.steps li { position: relative; padding: 22px 20px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--card-line); }
.steps span { font-weight: 900; font-size: 13px; letter-spacing: 0.1em; color: var(--accent-2); }
.steps p { color: var(--muted); margin: 0; font-size: 15px; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 32px; }
.principles div { padding: 4px 0 0 16px; border-left: 2px solid var(--accent); }
.principles p { color: var(--muted); margin: 0; font-size: 15px; }
.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chips li { padding: 7px 14px; border-radius: 999px; border: 1px solid var(--card-line); background: rgba(255, 255, 255, 0.03); font-size: 14px; font-weight: 600; color: var(--muted); }

/* contact */
.contact { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
.form { display: grid; gap: 14px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.opt { color: var(--muted); font-weight: 400; }
input, textarea { font: inherit; color: var(--ink); background: var(--field); border: 1px solid var(--card-line); border-radius: 12px; padding: 12px 14px; width: 100%; }
textarea { min-height: 150px; resize: vertical; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .btn { justify-self: start; }
.status { font-size: 15px; min-height: 1.6em; margin: 0; }
.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }
.fine { color: var(--muted); font-size: 13px; margin: 0; }

/* footer */
.foot { border-top: 1px solid var(--card-line); padding: 32px 0 40px; }
.foot-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.foot-in > div { display: flex; align-items: center; gap: 10px; }
.foot .logo { width: 26px; height: 26px; border-radius: 8px; font-size: 13px; }
.foot dl { display: flex; flex-wrap: wrap; gap: 6px 24px; margin: 0; }
.foot dl div { display: flex; gap: 8px; }
.foot dt { color: var(--muted); }
.foot dd { margin: 0; }

/* responsive */
@media (max-width: 900px) {
  .hero { padding: 64px 0 56px; }
  .hero-in, .contact { grid-template-columns: 1fr; }
  .hero-art { max-width: 460px; }
  .cards, .principles { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  nav a:not(.btn) { display: none; }
  .steps, .row { grid-template-columns: 1fr; }
  .section { padding: 64px 16px; }
  .foot dl { flex-direction: column; gap: 4px; }
}

/* motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .aurora span, .arch .links path { animation: none; }
  .arch .pulses { display: none; }
  .btn, .card { transition: none; }
}