:root {
  --bg: #070b0a;
  --bg-lift: #0d1512;
  --ink: #ecfdf5;
  --muted: #8fb3a8;
  --accent: #5eead4;
  --accent-soft: #a7f3d0;
  --line: rgba(94, 234, 212, 0.16);
  --glow: rgba(94, 234, 212, 0.28);
  --display: "Syne", "Segoe UI", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--ink);
  font-family: var(--body);
  background:
    radial-gradient(900px 560px at 85% -5%, rgba(94, 234, 212, 0.16), transparent 55%),
    radial-gradient(700px 480px at 0% 30%, rgba(45, 120, 100, 0.14), transparent 50%),
    linear-gradient(180deg, #0a1210 0%, var(--bg) 42%, #050807 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.035;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.top {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 24px 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand-link img {
  border-radius: 9px;
}

.top nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.top nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.lang select {
  appearance: none;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  font: inherit;
  cursor: pointer;
}

main { position: relative; z-index: 1; }

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  min-height: calc(100dvh - 72px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-soft);
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  animation: rise 0.7s ease both;
}

.brand-name {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: clamp(3.6rem, 8vw, 5.8rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.92;
  background: linear-gradient(120deg, #fff 8%, var(--accent-soft) 48%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: rise 0.7s ease 0.05s both;
}

.headline {
  margin: 0 0 14px;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  animation: rise 0.7s ease 0.1s both;
}

.lede {
  margin: 0 0 28px;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
  animation: rise 0.7s ease 0.15s both;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  animation: rise 0.7s ease 0.2s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 12px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn.primary {
  background: linear-gradient(105deg, var(--accent), #7ef0d8 55%, var(--accent-soft));
  color: #04110e;
  box-shadow: 0 14px 40px var(--glow);
}

.btn.primary img {
  border-radius: 7px;
  background: #0b1210;
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  border-color: var(--line);
}

.meta {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  animation: rise 0.7s ease 0.26s both;
}

.meta a { color: var(--accent-soft); text-decoration: none; }

.hero-visual { animation: rise 0.8s ease 0.18s both; }

.stage {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
  gap: 28px;
}

.keycap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  width: min(100%, 340px);
  padding: 28px 24px 22px;
  border-radius: 36px;
  border: 1.5px solid var(--line);
  background:
    linear-gradient(160deg, rgba(94, 234, 212, 0.08), transparent 50%),
    var(--bg-lift);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 30px 80px rgba(0, 0, 0, 0.45);
  animation: float 5.5s ease-in-out infinite;
}

.key-face {
  position: relative;
  width: 168px;
  height: 168px;
  border-radius: 28px;
  border: 2px solid var(--accent);
  background: #0b1210;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.legend-primary {
  position: absolute;
  top: 22px;
  left: 28px;
  font-family: var(--display);
  font-weight: 800;
  font-size: 4.2rem;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent);
  animation: pulse-soft 2.8s ease-in-out infinite;
}

.legend-secondary {
  position: absolute;
  right: 26px;
  bottom: 22px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 2.1rem;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent-soft);
  animation: pulse-soft 2.8s ease-in-out 1.4s infinite;
}

.key-caption {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.ticker {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 1.05rem;
}

.ticker code {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
}

#demo-wrong { color: #f0a8a8; }
#demo-right { color: var(--accent-soft); }
.tick-arrow { color: var(--muted); }

.band {
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px 24px;
  border-top: 1px solid var(--line);
}

.band h2 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-lede {
  margin: 0 0 36px;
  color: var(--muted);
  max-width: 36rem;
  font-size: 1.05rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding-top: 8px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.steps strong,
.feat-list strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.steps span,
.feat-list span {
  color: var(--muted);
  line-height: 1.5;
}

.feat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 36px;
}

.asset-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.asset-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.asset-list a:hover {
  border-color: var(--accent);
  background: rgba(94, 234, 212, 0.06);
}

.asset-list .size {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

footer a {
  color: var(--accent-soft);
  text-decoration: none;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 36px;
  }
  .steps { grid-template-columns: 1fr; }
  .feat-list { grid-template-columns: 1fr; }
  .top nav a:not(:last-of-type) { display: none; }
}