:root {
  --bg: #050a16;
  --bg-soft: #091326;
  --card: rgba(255,255,255,.07);
  --card-border: rgba(255,255,255,.14);
  --text: #f6f8ff;
  --muted: #aab6ce;
  --blue: #2ea8ff;
  --violet: #6336ff;
  --cyan: #61e2ff;
  --shadow: 0 24px 70px rgba(0,0,0,.38);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(46,168,255,.20), transparent 34rem),
    radial-gradient(circle at 80% 15%, rgba(99,54,255,.22), transparent 38rem),
    linear-gradient(180deg, #071021 0%, var(--bg) 45%, #030711 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
  pointer-events: none;
}

body.lang-en .cz { display: none; }
body:not(.lang-en) .en { display: none; }

a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem clamp(1.2rem, 5vw, 5rem);
  backdrop-filter: blur(18px);
  background: rgba(5,10,22,.68);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand img { width: 170px; display: block; filter: drop-shadow(0 8px 22px rgba(46,168,255,.18)); }
.nav { display: flex; gap: 1.4rem; color: var(--muted); font-size: .95rem; }
.nav a:hover { color: var(--text); }
.lang-toggle {
  border: 1px solid var(--card-border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 999px;
  padding: .75rem 1rem;
  cursor: pointer;
}

.section { width: min(1160px, calc(100% - 2rem)); margin: 0 auto; padding: 6rem 0; position: relative; }
.hero { min-height: 82vh; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 4rem; padding-top: 5rem; }
.eyebrow { color: var(--cyan); text-transform: uppercase; letter-spacing: .18em; font-size: .78rem; font-weight: 800; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(3rem, 7vw, 6.5rem); line-height: .95; letter-spacing: -.075em; margin-bottom: 1.6rem; }
h2 { font-size: clamp(2rem, 4vw, 4rem); line-height: 1; letter-spacing: -.055em; margin-bottom: 1.4rem; }
h3 { font-size: 1.35rem; margin-bottom: .8rem; }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.35rem); color: var(--muted); line-height: 1.7; max-width: 680px; }
.muted { color: var(--muted); line-height: 1.75; font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; padding: 1rem 1.35rem; font-weight: 800; }
.btn.primary { background: linear-gradient(135deg, var(--blue), var(--violet)); box-shadow: 0 16px 40px rgba(72,94,255,.34); }
.btn.ghost { border: 1px solid var(--card-border); background: rgba(255,255,255,.055); }

.hero-card { min-height: 510px; position: relative; border-radius: 2rem; background: linear-gradient(145deg, rgba(255,255,255,.12), rgba(255,255,255,.035)); border: 1px solid var(--card-border); box-shadow: var(--shadow); overflow: hidden; }
.orb { position: absolute; width: 310px; height: 310px; border-radius: 50%; background: linear-gradient(135deg, var(--blue), var(--violet)); filter: blur(5px); top: 45px; right: -75px; opacity: .82; }
.code-window { position: absolute; left: 8%; right: 8%; top: 28%; border: 1px solid rgba(255,255,255,.16); border-radius: 1.25rem; background: rgba(4,10,22,.78); backdrop-filter: blur(16px); overflow: hidden; }
.dots { display: flex; gap: .4rem; padding: 1rem; border-bottom: 1px solid rgba(255,255,255,.08); }
.dots i { width: .7rem; height: .7rem; border-radius: 50%; background: linear-gradient(135deg, var(--blue), var(--violet)); }
pre { margin: 0; padding: 1.2rem; color: #dce8ff; white-space: pre-wrap; line-height: 1.6; }
.metric-card { position: absolute; padding: 1rem 1.15rem; border-radius: 1.2rem; background: rgba(255,255,255,.09); border: 1px solid var(--card-border); backdrop-filter: blur(16px); }
.metric-card strong { display: block; font-size: 1.5rem; }
.metric-card span { color: var(--muted); font-size: .85rem; }
.metric-card.one { left: 8%; bottom: 12%; }
.metric-card.two { right: 8%; bottom: 20%; }

.section-head { max-width: 850px; margin-bottom: 2rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { min-height: 310px; padding: 1.45rem; border-radius: 1.5rem; background: var(--card); border: 1px solid var(--card-border); box-shadow: 0 18px 60px rgba(0,0,0,.22); }
.card p { color: var(--muted); line-height: 1.7; }
.icon { width: 3.1rem; height: 3.1rem; display: grid; place-items: center; border-radius: 1rem; margin-bottom: 1.4rem; background: linear-gradient(135deg, rgba(46,168,255,.22), rgba(99,54,255,.22)); border: 1px solid rgba(255,255,255,.12); color: var(--cyan); font-weight: 900; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 3rem; align-items: center; }
.features { display: grid; gap: .9rem; }
.features div { display: flex; align-items: center; gap: 1rem; padding: 1.1rem; border-radius: 1.1rem; background: rgba(255,255,255,.065); border: 1px solid var(--card-border); }
.features strong { color: var(--cyan); }

.tech { padding-top: 2rem; }
.tech-list { display: flex; gap: .85rem; flex-wrap: wrap; }
.tech-list span { padding: .85rem 1rem; border-radius: 999px; border: 1px solid rgba(255,255,255,.13); background: rgba(255,255,255,.06); color: #dfe8ff; }

.contact { display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem; align-items: center; border-radius: 2rem; padding: 3rem; margin-bottom: 5rem; background: linear-gradient(135deg, rgba(46,168,255,.14), rgba(99,54,255,.14)); border: 1px solid var(--card-border); }
.contact-box { display: grid; gap: .8rem; padding: 1.4rem; border-radius: 1.4rem; background: rgba(5,10,22,.48); border: 1px solid var(--card-border); }
.contact-box a { font-size: 1.1rem; font-weight: 800; color: var(--text); }
.contact-box a:hover { color: var(--cyan); }
.contact-box p { margin: .7rem 0 0; color: var(--muted); }

footer { width: min(1160px, calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0 3rem; display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); border-top: 1px solid rgba(255,255,255,.09); }
.reveal { opacity: 0; transform: translateY(22px); transition: .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: .12s; }
.delay-2 { transition-delay: .24s; }

@media (max-width: 900px) {
  .nav { display: none; }
  .brand img { width: 145px; }
  .hero, .split, .contact { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; gap: 2rem; }
  .hero-card { min-height: 390px; }
  .cards { grid-template-columns: 1fr; }
  .contact { padding: 1.5rem; }
  footer { flex-direction: column; }
}

@media (max-width: 520px) {
  .section { padding: 4rem 0; }
  h1 { font-size: 3.2rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .code-window { left: 1rem; right: 1rem; }
  pre { font-size: .85rem; }
}