:root {
  --bg: #0d1117;
  --bg-alt: #111823;
  --card: #161d27;
  --line: #24303e;
  --text: #e6edf3;
  --muted: #93a4b8;
  --accent: #38d9a9;
  --accent-2: #4dabf7;
  --radius: 14px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.wrap.narrow { max-width: 760px; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(13, 17, 23, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 62px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .04em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06231c;
  font-weight: 800;
}

.nav {
  display: flex;
  gap: 20px;
  margin-left: auto;
  font-size: 15px;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  transition: color .15s;
}

.nav a:hover { color: var(--text); }

.lang-switch {
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

.lang-switch:hover { color: var(--text); border-color: var(--accent); }

/* hero */
.hero {
  padding: 96px 0 80px;
  background:
    radial-gradient(900px 380px at 15% -10%, rgba(56, 217, 169, .16), transparent 65%),
    radial-gradient(700px 340px at 90% 0%, rgba(77, 171, 247, .14), transparent 60%);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -.02em;
}

.lead {
  margin: 0 0 30px;
  max-width: 620px;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--muted);
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .12s, background .15s, border-color .15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06231c;
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover { border-color: var(--accent); }

/* sections */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-title {
  margin: 0 0 34px;
  font-size: .82rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.product-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}

.card h3, .card h4 { margin: 0 0 10px; }
.card h3 { font-size: 1.5rem; letter-spacing: -.01em; }
.card h4 { font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }
.card-feature p + p { margin-top: 14px; }

.lead-sm { font-size: 1.08rem; color: var(--text) !important; }

.feature-list {
  display: grid;
  gap: 16px;
}

/* timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line);
}

.timeline-item { position: relative; padding-bottom: 30px; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(56, 217, 169, .14);
}

.timeline-item time {
  display: block;
  font-size: 12.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.timeline-item h3 { margin: 0 0 6px; font-size: 1.15rem; }
.timeline-item p { margin: 0; color: var(--muted); }

/* contact */
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.contact-list li {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
}

.contact-label {
  min-width: 92px;
  font-size: 12.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
}

.contact-list a { color: var(--text); text-decoration: none; }
.contact-list a:hover { text-decoration: underline; }

/* footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  font-size: 14px;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
}

/* responsive */
@media (max-width: 820px) {
  .product-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero { padding: 68px 0 56px; }
  .section { padding: 58px 0; }
}