@font-face {
  font-family: Archivo;
  src: url("../fonts/Archivo-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #08140e;
  --moss: #0f2418;
  --lime: #c8f54a;
  --ink: #102018;
  --paper: #f7f8f4;
  --mut: #5d6a60;
  --line: #dce4d8;
  --max: 1100px;
  --nav-h: 68px;
  --font: Archivo, ui-sans-serif, system-ui, Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: #eef5ea;
  background: var(--bg);
  line-height: 1.55;
  letter-spacing: -0.02em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
.wrap { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.skip { position: absolute; left: 12px; top: -40px; z-index: 80; background: var(--lime); color: var(--bg); padding: 8px 12px; }
.skip:focus { top: 12px; }

.nav {
  position: sticky; top: 0; z-index: 40; height: var(--nav-h);
  background: rgba(8, 20, 14, 0.82);
  backdrop-filter: blur(16px);
}
.nav.scrolled { border-bottom: 1px solid #1d3a28; }
.nav-inner { display: flex; align-items: center; gap: 14px; height: var(--nav-h); }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 750; letter-spacing: -0.05em; font-size: 20px; }
.logo-mark { width: 22px; height: 22px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 6px; font-size: 14px; }
.nav-links > a { padding: 8px 10px; color: #c5d4c8; border-radius: 6px; }
.nav-links > a:hover { color: #fff; }
.menu-toggle {
  display: none; margin-left: auto; width: 42px; height: 42px; border-radius: 6px;
  border: 1px solid #2c4a38; background: transparent; cursor: pointer;
}
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
  display: block; width: 16px; height: 2px; background: #eef5ea; margin: 0 auto; position: relative;
}
.menu-toggle span::before, .menu-toggle span::after { content: ""; position: absolute; left: 0; }
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: 6px; padding: 10px 16px; font-weight: 750; font-size: 14px; cursor: pointer;
  transition: transform 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-l { background: var(--lime); color: var(--bg); }
.btn-g { background: transparent; border: 1px solid #2c4a38; color: #eef5ea; }

.hero {
  padding: 72px 0 40px;
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(200, 245, 74, 0.14), transparent 50%),
    linear-gradient(#0a1a12, #08140e);
}
.hero h1 { font-size: clamp(2.6rem, 6.2vw, 4.6rem); letter-spacing: -0.055em; line-height: 1.02; margin: 12px 0 16px; }
.hero .lead { color: #c5d4c8; max-width: 38rem; margin: 0 auto 24px; font-size: 1.15rem; }
.kicker { color: var(--lime); font-size: 13px; font-weight: 650; letter-spacing: 0.04em; }
.graph {
  height: min(46vw, 380px);
  margin: 32px auto 0;
  max-width: 920px;
  border: 1px solid #1d3a28;
  border-radius: 16px;
  background: url("../img/nodes.svg") center / cover no-repeat, #06140c;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  position: relative;
  overflow: hidden;
}
.graph p {
  position: absolute; left: 16px; bottom: 12px;
  margin: 0; font-size: 12px; color: #9bb; letter-spacing: 0.04em;
}

.paper { background: var(--paper); color: var(--ink); padding: 88px 0; }
.paper h1, .paper h2 { letter-spacing: -0.04em; }
.paper h1 { font-size: clamp(2rem, 4vw, 3rem); margin: 0 0 16px; }
.paper h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); margin: 0 0 16px; }
.note { color: var(--mut); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  background: #fff;
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(16, 32, 24, 0.08); }
.stat { font-size: 1.8rem; font-weight: 750; letter-spacing: -0.05em; color: var(--ink); display: block; margin-bottom: 6px; }

.dark { padding: 88px 0; text-align: center; background: var(--moss); }
.footer { padding: 36px 0; color: #9bb; font-size: 14px; border-top: 1px solid #1d3a28; }
.form { display: grid; gap: 12px; max-width: 520px; }
.form label { display: grid; gap: 6px; font-size: 14px; }
.form input, .form textarea, .form select {
  padding: 12px; border-radius: 8px; border: 1px solid #cdd; font: inherit; color: var(--ink); background: #fff;
}
.cookie {
  position: fixed; bottom: 16px; left: 16px; max-width: 420px; z-index: 30;
  background: #102018; border: 1px solid #2c4a38; padding: 14px; border-radius: 10px;
  display: flex; gap: 10px; align-items: center; font-size: 13px;
}
.cookie[hidden] { display: none; }
.js [data-reveal] { opacity: 0; transform: translateY(16px); }
.js [data-reveal].in { animation: rise 0.75s var(--ease) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: var(--bg); padding: 16px; border-bottom: 1px solid #1d3a28;
  }
  .menu-toggle { display: block; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { animation: none !important; opacity: 1; transform: none; }
}