* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #080c17;
  --panel: rgba(255, 255, 255, 0.065);
  --panel-strong: rgba(255, 255, 255, 0.11);
  --text: #f3f7ff;
  --muted: #9ca8bd;
  --line: rgba(255, 255, 255, 0.14);
  --accent: #77e4ff;
  --accent-2: #b79cff;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.38);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    Meiryo,
    sans-serif;
  background:
    radial-gradient(circle at 14% 8%, rgba(119, 228, 255, 0.17), transparent 32rem),
    radial-gradient(circle at 80% 12%, rgba(183, 156, 255, 0.16), transparent 34rem),
    linear-gradient(135deg, #070a12 0%, #0d1224 48%, #080c17 100%);
  color: var(--text);
}

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

.site {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background:
    linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 32px rgba(119, 228, 255, 0.35);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

.nav-cta {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text) !important;
  background: var(--panel);
}

.hero {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 80px);
  padding: 58px 0 92px;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 26px;
  font-size: clamp(52px, 8vw, 104px);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

.lead {
  max-width: 620px;
  color: #d7dfef;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.95;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

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

.primary {
  color: #06111d;
  background: linear-gradient(135deg, var(--accent), #e0d7ff);
  box-shadow: 0 18px 46px rgba(119, 228, 255, 0.22);
}

.secondary {
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--panel);
}

.large {
  min-width: 170px;
}

.note,
.video-caption {
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
}

.video-shell {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(119, 228, 255, 0.12), rgba(183, 156, 255, 0.09)),
    #0c1222;
  box-shadow: var(--shadow);
}

.video-shell::before {
  content: "";
  position: absolute;
  inset: 16px;
  z-index: 1;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 24px;
}

.hero-video {
  width: 100%;
  height: 520px;
  display: block;
  object-fit: cover;
  opacity: 0.96;
}

.video-overlay {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.video-overlay span {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8, 12, 23, 0.55);
  color: #d9f8ff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  backdrop-filter: blur(12px);
}

.video-caption {
  margin-top: 12px;
  text-align: center;
}

code {
  color: #c8f5ff;
}

.section {
  padding: 92px 0;
  border-top: 1px solid var(--line);
}

.split {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 52px;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.section-text,
.cta-section p {
  color: #d5deed;
  font-size: 17px;
  line-height: 2;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 32px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  min-height: 260px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
}

.card-number {
  display: inline-flex;
  margin-bottom: 46px;
  color: var(--accent);
  font-weight: 900;
  letter-spacing: 0.12em;
}

.card h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.card p,
.usecase-list span {
  color: var(--muted);
  line-height: 1.8;
}

.usecase-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.usecase-list li {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.usecase-list strong {
  font-size: 20px;
}

.cta-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 76px;
  margin: 70px 0 50px;
  border: 1px solid var(--line);
  border-radius: 36px;
  background:
    radial-gradient(circle at 18% 10%, rgba(119, 228, 255, 0.2), transparent 26rem),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

.cta-section p {
  max-width: 720px;
  margin-bottom: 0;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 34px 0 48px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 900px) {
  .site {
    width: min(100% - 28px, 1180px);
  }

  .nav-links a:not(.nav-cta) {
    display: none;
  }

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

  .hero {
    gap: 34px;
    min-height: auto;
    padding-top: 38px;
  }

  .video-shell,
  .hero-video {
    min-height: 340px;
    height: 340px;
  }

  .usecase-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .cta-section {
    align-items: flex-start;
    flex-direction: column;
    padding: 34px;
  }
}