:root {
  --bg: #0b0d11;
  --bg-deep: #080a0e;
  --panel: rgba(17, 20, 27, 0.82);
  --panel-strong: rgba(22, 26, 36, 0.9);
  --ink: #f5f6f8;
  --muted: #a2abb8;
  --accent: #6aa5ff;
  --accent-soft: #3b6bb3;
  --stroke: rgba(255, 255, 255, 0.08);
  --glow: rgba(106, 165, 255, 0.35);
  --font-display: "SF Pro Display", "Segoe UI", "Tahoma", "Geneva", "Verdana", sans-serif;
  --font-body: "SF Pro Text", "Segoe UI", "Tahoma", "Geneva", "Verdana", sans-serif;
  --size-xxl: clamp(2.4rem, 3vw + 1.4rem, 4rem);
  --size-xl: 1.35rem;
  --size-lg: 1.05rem;
  --size-md: 0.95rem;
  --size-sm: 0.8rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: radial-gradient(circle at 12% 18%, rgba(106, 165, 255, 0.18), transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(132, 99, 255, 0.14), transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg-deep));
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(0);
  opacity: 0.75;
  animation: float 12s ease-in-out infinite;
}

.orb-one {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(106, 165, 255, 0.45), transparent 65%);
  top: -120px;
  left: -80px;
}

.orb-two {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(132, 99, 255, 0.38), transparent 70%);
  bottom: -140px;
  right: -80px;
  animation-delay: -4s;
}

.grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.16;
  mix-blend-mode: screen;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 8vw 12px;
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8, 10, 14, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.brand {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.08em;
}

.tag {
  font-size: var(--size-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 16, 24, 0.4);
  transition: color 0.2s ease, border 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--ink);
  border-color: rgba(106, 165, 255, 0.5);
  background: rgba(12, 16, 24, 0.7);
}

.lang-toggle {
  border: 1px solid var(--stroke);
  background: transparent;
  color: var(--ink);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
  transition: border 0.2s ease, transform 0.2s ease;
}

.lang-toggle:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

main {
  padding: 12px 10vw 80px;
  max-width: 1360px;
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(340px, 1.2fr) minmax(300px, 1fr);
  gap: 28px;
  align-items: start;
  padding: 48px 0 32px;
}

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: var(--size-xxl);
  margin: 12px 0 18px;
  line-height: 1.05;
  letter-spacing: 0.04em;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: var(--size-sm);
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 640px;
  margin: 0 0 22px;
}

.download-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.download-btn {
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.95rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--ink);
  transition: transform 0.2s ease, border 0.2s ease, background 0.2s ease;
}

.download-btn.primary {
  background: rgba(106, 165, 255, 0.18);
  border-color: rgba(106, 165, 255, 0.6);
  box-shadow: 0 12px 26px -18px rgba(106, 165, 255, 0.7);
}

.download-btn.ghost:hover {
  border-color: rgba(106, 165, 255, 0.5);
}

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

.vision-block {
  margin: 64px 0 42px;
}

.guide {
  margin: 64px 0 42px;
}

.guide-card {
  padding: 28px 28px 30px;
  border-radius: 18px;
  border: 1px solid rgba(106, 165, 255, 0.2);
  background: linear-gradient(150deg, rgba(12, 18, 28, 0.9), rgba(10, 14, 20, 0.85));
  box-shadow: 0 24px 60px -42px rgba(0, 0, 0, 0.8);
}

.guide-head h2 {
  margin: 6px 0 12px;
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: 0.08em;
}

.guide-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  max-width: 640px;
}

.guide-label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
}

.guide-steps {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: 16px;
  counter-reset: guide;
}

.guide-step {
  padding: 18px 18px 20px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 14, 20, 0.65);
  position: relative;
}

.guide-step::before {
  counter-increment: guide;
  content: "0" counter(guide);
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: rgba(106, 165, 255, 0.7);
}

.guide-step h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
}

.guide-step p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.demo {
  margin: 56px 0 28px;
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(520px, 1.4fr);
  gap: 26px;
  align-items: center;
}

.demo-copy h2 {
  margin: 6px 0 12px;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.06em;
}

.demo-label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.demo-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.demo-media {
  border-radius: 16px;
  border: 1px solid rgba(106, 165, 255, 0.2);
  background: rgba(12, 16, 24, 0.8);
  padding: 10px;
  box-shadow: 0 24px 60px -44px rgba(0, 0, 0, 0.8);
}

.demo-media video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #0a0d12;
}

.vision-card {
  padding: 28px 28px 30px;
  border-radius: 18px;
  border: 1px solid rgba(106, 165, 255, 0.25);
  background: linear-gradient(135deg, rgba(18, 24, 36, 0.92), rgba(10, 14, 20, 0.8));
  box-shadow: 0 24px 60px -40px rgba(0, 0, 0, 0.8);
}

.vision-label {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
}

.vision-card h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: 0.08em;
}

.vision-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.faq {
  margin-top: 56px;
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(12, 16, 24, 0.7);
}

.faq-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq details {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 14px 16px;
  background: rgba(10, 14, 20, 0.6);
  transition: border 0.2s ease, background 0.2s ease;
}

.faq details[open] {
  border-color: rgba(106, 165, 255, 0.4);
  background: rgba(16, 20, 30, 0.8);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.98rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  font-size: 1.1rem;
  color: var(--muted);
  transition: transform 0.2s ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
  animation: faq-in 0.2s ease;
}


@keyframes faq-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

 

.footer {
  display: flex;
  justify-content: space-between;
  padding: 22px 6vw 32px;
  color: var(--muted);
  font-size: 0.82rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(18px);
  }
}

@keyframes lift {
  from {
    transform: translateY(16px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 980px) {
  .nav {
    padding: 20px 6vw 10px;
  }

  main {
    padding: 12px 6vw 70px;
  }

  .hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav {
    padding: 18px 6vw 8px;
  }

  .hero {
    padding-top: 28px;
  }

  .faq {
    padding: 20px 16px;
  }

  .vision-card {
    padding: 22px 18px;
  }

  .demo {
    grid-template-columns: 1fr;
  }

  .guide-card {
    padding: 22px 18px;
  }

  .guide-steps {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    gap: 8px;
  }

  .footer {
    flex-direction: column;
    gap: 6px;
  }
}