:root {
  --black: #050505;
  --ink: #0b0d08;
  --panel: #11140d;
  --panel-strong: #171c10;
  --acid: #d7ff00;
  --acid-soft: #edff78;
  --white: #f7f9ef;
  --muted: #a8ad9a;
  --line: rgba(215, 255, 0, 0.24);
  --shadow: 0 28px 90px rgba(215, 255, 0, 0.12);
  color: var(--white);
  background: var(--black);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(140deg, rgba(215, 255, 0, 0.12), transparent 34rem),
    linear-gradient(180deg, #050505 0%, #090b08 45%, #050505 100%);
}

a { color: inherit; text-underline-offset: 0.22em; }
a:hover { color: var(--acid-soft); }

.site-header,
main,
.footer {
  width: min(100% - 40px, 1080px);
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--acid);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0;
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.brand span span { color: var(--white); }

.nav {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav a { text-decoration: none; }

.hero {
  min-height: 72svh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: 54px;
  padding: 76px 0 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--acid);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 0 0 22px;
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  line-height: 0.94;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 0;
  color: #dfe5cf;
  font-size: clamp(1.06rem, 2vw, 1.28rem);
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--acid);
  border-radius: 8px;
  background: var(--acid);
  color: var(--black);
  font-weight: 850;
  text-decoration: none;
}

.button:hover {
  color: var(--black);
  background: var(--acid-soft);
}

.button.ghost {
  background: transparent;
  color: var(--acid);
}

.button.ghost:hover {
  background: rgba(215, 255, 0, 0.08);
  color: var(--acid-soft);
}

.app-visual {
  margin: 0;
  display: grid;
  place-items: center;
}

.app-visual img {
  width: min(100%, 360px);
  aspect-ratio: 1;
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 0 0 80px;
}

.tile {
  min-height: 230px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 92%, var(--acid) 8%);
  color: var(--white);
  text-decoration: none;
}

.tile:hover {
  border-color: rgba(215, 255, 0, 0.64);
  color: var(--white);
  transform: translateY(-2px);
}

.tile span {
  display: block;
  color: var(--acid);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tile strong {
  display: block;
  margin: 18px 0 10px;
  font-size: 1.25rem;
  line-height: 1.15;
}

.tile p {
  margin: 0;
  color: var(--muted);
  line-height: 1.52;
}

.page {
  max-width: 820px;
  padding: 64px 0 86px;
}

.page h1 {
  font-size: clamp(2.6rem, 8vw, 5rem);
}

.page h2 {
  margin: 42px 0 10px;
  color: var(--acid-soft);
  font-size: 1.28rem;
  letter-spacing: 0;
}

.page h3 {
  margin: 26px 0 8px;
  font-size: 1.02rem;
}

.page p,
.page li,
.contact {
  color: #d8dec9;
  line-height: 1.66;
}

.page ul { padding-left: 22px; }

.notice {
  margin: 28px 0 8px;
  padding: 18px;
  border: 1px solid rgba(215, 255, 0, 0.42);
  border-radius: 8px;
  background: rgba(215, 255, 0, 0.08);
}

.notice h2 {
  margin-top: 0;
}

.contact {
  padding-left: 18px;
  border-left: 3px solid var(--acid);
  font-style: normal;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.steps article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

.steps span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--acid);
  color: var(--black);
  font-weight: 900;
}

.steps h2 {
  margin-top: 18px;
}

.footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 26px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 860px) {
  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 34px;
    padding-top: 58px;
  }

  .app-visual {
    justify-content: start;
  }

  .app-visual img {
    width: min(72vw, 280px);
    border-radius: 24px;
  }

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

@media (max-width: 620px) {
  .site-header,
  main,
  .footer {
    width: min(100% - 30px, 1080px);
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  h1,
  .page h1 {
    font-size: clamp(2.35rem, 13vw, 3.8rem);
  }

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

  .tile {
    min-height: 170px;
  }
}