:root {
  --bg: #0b0d0f;
  --bg-elev: #12161a;
  --bg-soft: #181d22;
  --line: rgba(255, 255, 255, 0.08);
  --text: #eef2f4;
  --muted: #8d969e;
  --teal: #2ad4c8;
  --teal-dim: rgba(42, 212, 200, 0.16);
  --teal-glow: rgba(42, 212, 200, 0.35);
  --spark: linear-gradient(135deg, #7dd3fc 0%, #c4b5fd 42%, #f9a8d4 100%);
  --radius: 18px;
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --max: 1080px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(900px 520px at 50% -10%, rgba(42, 212, 200, 0.12), transparent 60%),
    radial-gradient(700px 420px at 85% 15%, rgba(196, 181, 253, 0.08), transparent 55%),
    var(--bg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  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='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 15, 0.78);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.nav {
  display: none;
  gap: 1.25rem;
  margin-left: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
}

.lang-btn {
  padding: 0.28rem 0.7rem;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-btn.is-active {
  color: var(--bg);
  background: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.2rem;
  border-radius: 12px;
  font-weight: 600;
  transition: transform 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}

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

.btn:focus-visible,
.lang-btn:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.btn-sm {
  min-height: 2.2rem;
  padding: 0.4rem 0.95rem;
  font-size: 0.9rem;
}

.btn-lg {
  min-height: 3.15rem;
  padding: 0.85rem 1.45rem;
  font-size: 1.05rem;
}

.btn-primary {
  color: #061112;
  background: var(--text);
}

.btn-primary:hover {
  background: #fff;
}

.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(42, 212, 200, 0.45);
  background: var(--teal-dim);
}

.btn-meta {
  opacity: 0.55;
  font-size: 0.82rem;
  font-weight: 500;
}

.hero {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 10vw, 6.5rem) 1.5rem 2.5rem;
  text-align: center;
}

.hero-glow {
  position: absolute;
  left: 50%;
  top: 12%;
  width: min(720px, 90vw);
  height: 280px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--teal-glow), transparent 70%);
  filter: blur(18px);
  opacity: 0.55;
  pointer-events: none;
}

.hero-logo {
  position: relative;
  width: clamp(88px, 16vw, 128px);
  height: auto;
  margin: 0 auto 1.1rem;
  border-radius: 28px;
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.06);
  animation: logo-in 700ms var(--ease) both;
}

.hero-brand {
  position: relative;
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--teal);
}

.hero h1 {
  position: relative;
  margin: 0 auto;
  max-width: 15ch;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 4.6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.hero-accent {
  background: var(--spark);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  position: relative;
  max-width: 38rem;
  margin: 1.35rem auto 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.hero-cta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.85rem;
}

.hero-meta {
  position: relative;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.demo,
.features,
.how,
.require,
.download,
.faq {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
}

.section-head {
  max-width: 40rem;
  margin: 0 auto 2.25rem;
  text-align: center;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section-head p {
  margin: 0.85rem 0 0;
  color: var(--muted);
}

.demo-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%),
    var(--bg-elev);
  box-shadow:
    0 0 0 1px rgba(42, 212, 200, 0.08),
    0 30px 80px rgba(0, 0, 0, 0.45);
}

.demo-frame::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto;
  height: 55%;
  background: radial-gradient(closest-side, rgba(42, 212, 200, 0.18), transparent 70%);
  pointer-events: none;
}

.demo-placeholder {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.85rem;
  padding: 1.5rem;
  text-align: center;
}

.demo-play {
  display: grid;
  place-items: center;
  width: 4.25rem;
  height: 4.25rem;
  border-radius: 16px;
  color: #061112;
  background: var(--text);
  box-shadow: 0 0 0 12px rgba(255, 255, 255, 0.06);
  animation: pulse 2.8s var(--ease) infinite;
}

.demo-label {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
}

.demo-hint {
  margin: 0;
  max-width: 28rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.demo-embed,
.demo-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-list li {
  padding: 1.35rem 1.4rem;
  background: var(--bg-elev);
}

.feature-list h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.flow {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.flow li {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(42, 212, 200, 0.05), transparent 55%), var(--bg-elev);
}

.flow-step {
  display: inline-block;
  margin-bottom: 0.55rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.flow h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.flow p {
  margin: 0;
  color: var(--muted);
}

.shot {
  margin: 0;
}

.shot img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.shot figcaption {
  margin-top: 0.75rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.req-grid {
  display: grid;
  gap: 1rem;
}

.req-grid > div {
  padding: 1.35rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

.req-grid h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.req-grid ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.req-grid li + li {
  margin-top: 0.4rem;
}

.download-panel {
  padding: clamp(1.8rem, 4vw, 2.6rem);
  border-radius: calc(var(--radius) + 6px);
  border: 1px solid rgba(42, 212, 200, 0.28);
  background:
    radial-gradient(600px 220px at 20% 0%, rgba(42, 212, 200, 0.16), transparent 60%),
    var(--bg-elev);
  text-align: center;
}

.download-panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}

.download-panel > p {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.download-note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.faq-list {
  max-width: 44rem;
  margin: 0 auto;
  display: grid;
  gap: 0.65rem;
}

details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-elev);
  padding: 0.2rem 1rem 0.2rem;
}

summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
}

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

details p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
  border-top: 1px solid var(--line);
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.footer-brand img {
  border-radius: 7px;
}

.site-footer > p {
  margin: 0.7rem 0 1.1rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--teal);
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 12px rgba(255, 255, 255, 0.06);
  }
  50% {
    box-shadow: 0 0 0 18px rgba(42, 212, 200, 0.12);
  }
}

@keyframes logo-in {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (min-width: 760px) {
  .nav {
    display: flex;
  }

  .feature-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow {
    grid-template-columns: repeat(3, 1fr);
  }

  .req-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 980px) {
  .feature-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .demo-play,
  .hero-logo {
    transition: none;
    animation: none;
  }

  .btn:hover {
    transform: none;
  }
}