:root {
  --bg: #0B0D10;
  --bg-alt: #0F1216;
  --panel: #14171C;
  --line: #23272F;
  --ink: #F2F0EA;
  --muted: #9097A1;
  --acc: #C6FF3D;
  --acc-ink: #0B0D10;
  --radius: 20px;
  --sans: 'Space Grotesk', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 56px 56px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
.acc { color: var(--acc); }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 6px; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--acc); color: var(--acc-ink); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 16px; }

.wrap { width: min(1160px, 100% - 48px); margin-inline: auto; }
.wrap--narrow { width: min(820px, 100% - 48px); }

/* ---------- Type ---------- */
h1 { font-size: clamp(46px, 7.4vw, 92px); line-height: .98; letter-spacing: -.035em; font-weight: 700; }
h2 { font-size: clamp(36px, 5vw, 60px); line-height: 1.02; letter-spacing: -.03em; font-weight: 700; margin-bottom: 40px; }
h3 { font-size: 22px; line-height: 1.25; letter-spacing: -.01em; font-weight: 700; }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 60ch; margin-top: 22px; }
.tag {
  display: inline-block; font: 500 13px/1 var(--mono); color: var(--acc);
  border: 1.5px solid var(--acc); border-radius: 100px; padding: 8px 14px; margin-bottom: 22px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--acc); color: var(--acc-ink); font: 700 16px/1 var(--sans);
  padding: 16px 26px; border-radius: 100px; border: 0; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(198,255,61,.25); }
.btn--ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn--ghost:hover { border-color: var(--ink); box-shadow: none; }
.btn--sm { padding: 11px 18px; font-size: 14px; }
.btn--full { width: 100%; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,16,.8); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; gap: 32px; height: 68px; }
.logo { font: 700 22px var(--mono); letter-spacing: -.04em; }
.nav__links { display: flex; gap: 28px; margin-left: auto; font-size: 15px; color: var(--muted); }
.nav__links a:hover { color: var(--ink); }
.nav__actions { display: flex; align-items: center; gap: 12px; }
.lang {
  background: none; color: var(--ink); border: 1.5px solid var(--line); border-radius: 100px;
  font: 500 13px var(--mono); padding: 9px 12px; cursor: pointer;
}
.lang:hover { border-color: var(--ink); }
.burger { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; }
.burger span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--ink); transition: transform .2s ease; }
.burger span:first-child { top: 15px; }
.burger span:last-child { top: 23px; }
.burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 96px 0 104px; overflow: hidden; }
.glow { position: absolute; border-radius: 50%; pointer-events: none; background: radial-gradient(circle, rgba(198,255,61,.14), transparent 65%); }
.glow--hero { width: 900px; height: 900px; right: -300px; top: -380px; }
.hero__inner { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.stats { display: flex; flex-wrap: wrap; gap: 20px 44px; margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--line); }
.stats strong { display: block; font: 700 24px var(--mono); color: var(--ink); }
.stats span { font-size: 14px; color: var(--muted); }

.terminal { background: #07080A; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: 0 40px 100px rgba(0,0,0,.55); }
.terminal__bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.terminal__bar i { width: 12px; height: 12px; border-radius: 50%; background: #FF5F57; }
.terminal__bar i:nth-child(2) { background: #FEBC2E; }
.terminal__bar i:nth-child(3) { background: #28C840; }
.terminal__bar span { margin-left: 10px; font: 13px var(--mono); color: var(--muted); }
.terminal__body { padding: 24px 26px; font: 14.5px/1.9 var(--mono); color: var(--ink); white-space: pre; overflow-x: auto; }
.hash { color: #FEBC2E; }
.cursor { display: inline-block; width: 9px; height: 18px; background: var(--acc); vertical-align: -3px; margin-left: 6px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
.section { padding: 104px 0; border-top: 1px solid var(--line); }
.section--alt { background: rgba(15,18,22,.7); }
.section__note { margin-top: 36px; font-size: 20px; }

.problems { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.problem { display: flex; align-items: baseline; gap: 22px; padding: 24px 26px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.problem b { font: 700 20px var(--mono); color: var(--acc); min-width: 110px; }
.problem span { color: var(--muted); }

.grid { display: grid; gap: 18px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card { padding: 30px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); transition: border-color .2s ease, transform .2s ease; }
.card:hover { border-color: rgba(198,255,61,.5); transform: translateY(-3px); }
.card__n { font: 500 13px var(--mono); color: var(--acc); }
.card h3 { margin: 14px 0 8px; }
.card p { color: var(--muted); font-size: 16px; }

/* ---------- Journey ---------- */
.exp { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.exp__item { padding: 28px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.exp__item h3 { margin: 10px 0 8px; }
.exp__item p { color: var(--muted); font-size: 16px; }
.date { font: 500 13px var(--mono); color: var(--acc); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; margin-bottom: 18px; }
.chips li { font: 500 12.5px var(--mono); padding: 6px 12px; border: 1px solid var(--line); border-radius: 100px; color: var(--ink); background: rgba(255,255,255,.02); }
.chips--lg li { font-size: 15px; padding: 10px 16px; }
.chips li.is-key { background: var(--acc); color: var(--acc-ink); border-color: var(--acc); font-weight: 700; }

/* ---------- Process ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.steps li { position: relative; padding: 30px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.steps__n { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--acc); color: var(--acc-ink); font: 700 18px var(--mono); margin-bottom: 18px; }
.steps p { color: var(--muted); font-size: 16px; margin-top: 6px; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: start; }
.about h2 { margin-bottom: 0; }
.checks { margin-top: 30px; display: grid; gap: 12px; }
.checks li { padding-left: 32px; position: relative; }
.checks li::before { content: '✓'; position: absolute; left: 0; color: var(--acc); font-weight: 700; }
.stack { padding: 32px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.stack__title { font: 500 14px var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.stack__note { color: var(--muted); font-size: 15px; }

/* ---------- FAQ ---------- */
.faq { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 24px 40px 24px 0; font-size: 20px; font-weight: 500; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font: 400 28px var(--mono); color: var(--acc); transition: transform .2s ease; }
.faq[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq p { color: var(--muted); padding: 0 40px 26px 0; max-width: 65ch; }

/* ---------- Contact ---------- */
.contact { position: relative; overflow: hidden; }
.glow--contact { width: 1000px; height: 1000px; left: -420px; bottom: -520px; }
.contact__inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact__title { font-size: clamp(46px, 7vw, 84px); margin-bottom: 0; }
.channels { margin-top: 36px; display: grid; gap: 10px; }
.channels a { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 18px 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); font: 500 15px var(--mono); transition: border-color .2s ease; overflow-wrap: anywhere; }
.channels a:hover { border-color: var(--acc); }
.channels span { font-family: var(--sans); font-weight: 700; color: var(--acc); font-size: 16px; }

.form { display: grid; gap: 18px; padding: 32px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.form label { display: grid; gap: 8px; font-size: 14px; color: var(--muted); }
.form input, .form select, .form textarea {
  width: 100%; background: var(--bg); color: var(--ink); border: 1.5px solid var(--line); border-radius: 12px;
  padding: 14px 16px; font: 16px var(--sans); resize: vertical;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--acc); }
.form__hint { font-size: 13px; color: var(--muted); text-align: center; }
.form__error { font-size: 14px; color: #FF8A7A; text-align: center; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 36px 0; color: var(--muted); font-size: 14px; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer .logo { color: var(--ink); font-size: 18px; }
.footer__links { display: flex; gap: 22px; }
.footer__links a:hover { color: var(--ink); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .hero__inner, .about, .contact__inner { grid-template-columns: 1fr; }
  .exp { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .burger { display: block; }
  .nav__links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; gap: 0; margin: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 24px 20px;
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .nav__links.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__links a { padding: 14px 0; font-size: 18px; color: var(--ink); border-bottom: 1px solid var(--line); }
  .nav__actions { margin-left: auto; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap, .wrap--narrow { width: calc(100% - 32px); }
  .hero { padding: 64px 0 72px; }
  .section { padding: 72px 0; }
  .grid--3, .steps, .problems, .exp { grid-template-columns: 1fr; }
  .problem { flex-direction: column; gap: 4px; }
  .nav__actions .btn { display: none; }
  .terminal__body { font-size: 12.5px; padding: 20px; }
  .card, .exp__item, .steps li, .stack, .form { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}